commit 637ac13df49ebc5a565041137096fbe7d03fdb8c
parent 05745ca52c11ad9905777fba1e4c95a9e461be83
Author: Jon Harmon <jonthegeek@gmail.com>
Date: Mon, 4 Aug 2025 11:45:02 -0500
Auto-create chapter indices based on slides and videos available (#81)
Diffstat:
191 files changed, 23880 insertions(+), 12258 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -4,10 +4,11 @@
.httr-oauth
.DS_Store
-# Ignore things during render.
+# Ignore things generated during render.
*.html
*.rmarkdown
/.quarto/
/_site/
/site_libs/
figure-revealjs
+/[0-9][0-9]*.qmd
diff --git a/01.qmd b/01.qmd
@@ -1,16 +0,0 @@
----
-title: "1. Introduction"
-listing:
- - contents: "slides/01.qmd"
- id: slides
- type: grid
- - contents: "videos/01"
- id: videos
- type: grid
- grid-columns: 2
- sort: "filename desc"
-header-includes:
- - '<script src="listing_new_window.js" defer></script>'
----
-
-{{< include _chapter_body.qmd >}}
diff --git a/02.qmd b/02.qmd
@@ -1,16 +0,0 @@
----
-title: "2. Names and values"
-listing:
- - contents: "slides/02.qmd"
- id: slides
- type: grid
- - contents: "videos/02"
- id: videos
- type: grid
- grid-columns: 2
- sort: "filename desc"
-header-includes:
- - '<script src="listing_new_window.js" defer></script>'
----
-
-{{< include _chapter_body.qmd >}}
diff --git a/DESCRIPTION b/DESCRIPTION
@@ -20,6 +20,7 @@ Imports:
DiagrammeR,
dplyr,
emoji,
+ fs,
ggbeeswarm,
ggplot2,
glue,
@@ -33,10 +34,12 @@ Imports:
purrr,
R6,
Rcpp,
+ readr,
reshape2,
rlang,
rmarkdown,
scales,
sloop,
tidyverse,
+ yaml,
zeallot
diff --git a/_chapter_body.qmd b/_chapter_body.qmd
@@ -1,7 +0,0 @@
-:::{#slides}
-:::
-
-## Meeting videos
-
-:::{#videos}
-:::
diff --git a/_freeze/site_libs/DiagrammeR-binding-1.0.11/DiagrammeR.js b/_freeze/site_libs/DiagrammeR-binding-1.0.11/DiagrammeR.js
@@ -0,0 +1,205 @@
+HTMLWidgets.widget({
+
+ name: 'DiagrammeR',
+
+ type: 'output',
+
+ initialize: function(el, width, height) {
+
+ /* wait to initialize until renderValue
+ since x not provided until then
+ and mermaid will try to build the diagram
+ as soon as class of the div is set to "mermaid"
+ */
+
+ /* to prevent auto init() by mermaid
+ not documented but
+ see lines https://github.com/knsv/mermaid/blob/master/src/main.js#L100-L109
+ mermaid_config in global with mermaid_config.startOnLoad = false
+ appears to turn off the auto init behavior
+ allowing us to callback after manually init and then callback
+ after complete
+ */
+ window.mermaid.startOnLoad = false;
+
+ // set config options for Gantt
+ // undocumented but these can be provided
+ // so from R
+ // m1 <- mermaid(spec)
+ // m1$x$config = list(ganttConfig = list( barHeight = 100 ) )
+ mermaid.ganttConfig = {
+ titleTopMargin:25,
+ barHeight:20,
+ barGap:4,
+ topPadding:50,
+ sidePadding:100,
+ gridLineStartPadding:35,
+ fontSize:11,
+ numberSectionStyles:4,
+ axisFormatter: [
+ // Within a day
+ ["%I:%M", function (d) {
+ return d.getHours();
+ }],
+ // Monday a week
+ ["w. %U", function (d) {
+ return d.getDay() == 1;
+ }],
+ // Day within a week (not monday)
+ ["%a %d", function (d) {
+ return d.getDay() && d.getDate() != 1;
+ }],
+ // within a month
+ ["%b %d", function (d) {
+ return d.getDate() != 1;
+ }],
+ // Month
+ ["%m-%y", function (d) {
+ return d.getMonth();
+ }]
+ ]
+ };
+
+ return {
+ // TODO: add instance fields as required
+ }
+
+ },
+
+ renderValue: function(el, x, instance) {
+
+ // if no diagram provided then assume
+ // that the diagrams are provided through htmltools tags
+ // and DiagrammeR was just used for dependencies
+ if ( x.diagram != "" ) {
+ el.innerHTML = x.diagram;
+ //if dynamic such as shiny remove data-processed
+ // so mermaid will reprocess and redraw
+ el.removeAttribute("data-processed");
+ el.classList.add('mermaid');
+ //make sure if shiny that we turn display back on
+ el.style.display = "";
+ //again if dynamic such as shiny
+ // explicitly run mermaid.init()
+ } else {
+ // set display to none
+ // should we remove instead??
+ el.style.display = "none";
+ }
+
+ // check for undocumented ganttConfig
+ // to override the defaults manually entered
+ // in initialize above
+ // note this is really sloppy and will not
+ // work well if multiple gantt charts
+ // with custom configs here
+ if( typeof x.config !== "undefined" &&
+ typeof x.config.ganttConfig !== "undefined" ){
+ Object.keys(x.config.ganttConfig).map(function(k){
+ window.mermaid.ganttConfig[k] = x.config.ganttConfig[k];
+ })
+ }
+
+
+ // use this to sort of make our diagram responsive
+ // or at a minimum fit within the bounds set by htmlwidgets
+ // for the parent container
+ function makeResponsive(el){
+ var svg = el.getElementsByTagName("svg")[0];
+ if(svg){
+ if(svg.width) {svg.removeAttribute("width")};
+ if(svg.height) {svg.removeAttribute("height")};
+ svg.style.width = "100%";
+ svg.style.height = "100%";
+ }
+ };
+
+
+ // get all DiagrammeR mermaids widgets
+ dg = document.getElementsByClassName("DiagrammeR");
+ // run mermaid.init
+ // but use try catch block
+ // to send error to the htmlwidget for display
+ try{
+ mermaid.init( el );
+
+ // sort of make our diagram responsive
+ // should we make this an option?
+ // if so, then could easily add to list of post process tasks
+ makeResponsive( el );
+
+ if (HTMLWidgets.shinyMode) {
+ // Get widget id
+ var id = el.id;
+
+ $("#" + id + " .node").click(function(e) {
+ // Build return object *obj* with node-id and node textContent
+ var obj = {
+ id: e.currentTarget.id,
+ nodeValues: e.currentTarget.textContent
+ };
+ // Send *obj* to Shiny's inputs (input$[id]+_click e.g.: input$vtree_click))
+ Shiny.setInputValue(id + "_click", obj, {priority: "event"});
+ });
+ }
+
+ /*
+ // change the id of our SVG assigned by mermaid to prevent conflict
+ // mermaid.init has a counter that will reset to 0
+ // and cause duplication of SVG id if multiple
+ d3.select(el).select("svg")
+ .attr("id", "mermaidChart-" + el.id);
+ // now we have to change the styling assigned by mermaid
+ // to point to our new id that we have assigned
+ // will add if since sequence diagrams do not have stylesheet
+ if(d3.select(el).select("svg").select("style")[0][0]){
+ d3.select(el).select("svg").select("style")[0][0].innerHTML = d3.select(el).select("svg")
+ .select("style")[0][0].innerHTML
+ */
+ /// sep comment for / in regex .replace(/mermaidChart[0-9]*/gi, "mermaidChart-" + el.id);
+ /*}
+ */
+
+ // set up a container for tasks to perform after completion
+ // one example would be add callbacks for event handling
+ // styling
+ if (!(typeof x.tasks === "undefined") ){
+ if ( (typeof x.tasks.length === "undefined") ||
+ (typeof x.tasks === "function" ) ) {
+ // handle a function not enclosed in array
+ // should be able to remove once using jsonlite
+ x.tasks = [x.tasks];
+ }
+ x.tasks.map(function(t){
+ // for each tasks add it to the mermaid.tasks with el
+ t.call(el);
+ })
+ }
+
+ } catch(e) {
+ // if error look for last processed DiagrammeR
+ // and send error to the container div
+ // with pre containing the errors
+ var processedDg = d3.selectAll(".DiagrammeR[data-processed=true]");
+ // select the last
+ processedDg = d3.select(processedDg[0][processedDg[0].length - 1])
+ // remove the svg
+ processedDg.select("svg").remove();
+
+ //if dynamic such as shiny remove data-processed
+ // so mermaid will reprocess and redraw
+ if (HTMLWidgets.shinyMode) {
+ el.removeAttribute("data-processed")
+ }
+
+ processedDg.append("pre").html( ["parse error with " + x.diagram, e.message].join("\n") )
+ }
+
+ },
+
+ resize: function(el, width, height, instance) {
+
+ }
+
+
+});
diff --git a/_freeze/site_libs/DiagrammeR-styles-0.2/styles.css b/_freeze/site_libs/DiagrammeR-styles-0.2/styles.css
@@ -0,0 +1,14 @@
+.DiagrammeR,.grViz pre {
+ white-space: pre-wrap; /* CSS 3 */
+ white-space: -moz-pre-wrap; /* Mozilla, since 1999 */
+ white-space: -pre-wrap; /* Opera 4-6 */
+ white-space: -o-pre-wrap; /* Opera 7 */
+ word-wrap: break-word; /* Internet Explorer 5.5+ */
+}
+
+.DiagrammeR g .label {
+ font-family: Helvetica;
+ font-size: 14px;
+ color: #333333;
+}
+
diff --git a/_freeze/site_libs/chromatography-0.1/LICENSE b/_freeze/site_libs/chromatography-0.1/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 We Are Visualizers
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
diff --git a/_freeze/site_libs/chromatography-0.1/chromatography.js b/_freeze/site_libs/chromatography-0.1/chromatography.js
@@ -0,0 +1,1105 @@
+(function () {
+
+ var Categories, Color, ColorScale, chromato, CSSColors, Ramp, root, type, _ref, _ref2, _ref3;
+ var __hasProp = Object.prototype.hasOwnProperty, __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor; child.__super__ = parent.prototype; return child; };
+
+ root = typeof exports !== 'undefined' && exports !== null ? exports : this;
+
+ chromato = (_ref = root.chromato) != null ? _ref : root.chromato = {};
+
+ if (typeof module !== 'undefined' && module !== null) module.exports = chromato;
+
+ Color = (function() {
+ function Color(x, y, z, m) {
+ var me, _ref2;
+ me = this;
+ if (!(x != null) && !(y != null) && !(z != null) && !(m != null)) {
+ x = [255, 0, 255];
+ }
+ if (type(x) === 'array' && x.length === 3) {
+ if (m == null) m = y;
+ _ref2 = x, x = _ref2[0], y = _ref2[1], z = _ref2[2];
+ }
+ if (type(x) === 'string') {
+ m = 'hex';
+ } else {
+ if (m == null) m = 'rgb';
+ }
+ if (m === 'rgb') {
+ me.rgb = [x, y, z];
+ } else if (m === 'hsl') {
+ me.rgb = Color.hsl2rgb(x, y, z);
+ } else if (m === 'hsv') {
+ me.rgb = Color.hsv2rgb(x, y, z);
+ } else if (m === 'hex') {
+ me.rgb = Color.hex2rgb(x);
+ } else if (m === 'lab') {
+ me.rgb = Color.lab2rgb(x, y, z);
+ } else if (m === 'hcl') {
+ me.rgb = Color.hcl2rgb(x, y, z);
+ } else if (m === 'hsi') {
+ me.rgb = Color.hsi2rgb(x, y, z);
+ }
+ }
+
+ Color.prototype.hex = function() {
+ return Color.rgb2hex(this.rgb);
+ };
+
+ Color.prototype.toString = function() {
+ return this.hex();
+ };
+
+ Color.prototype.hsl = function() {
+ return Color.rgb2hsl(this.rgb);
+ };
+
+ Color.prototype.hsv = function() {
+ return Color.rgb2hsv(this.rgb);
+ };
+
+ Color.prototype.lab = function() {
+ return Color.rgb2lab(this.rgb);
+ };
+
+ Color.prototype.hcl = function() {
+ return Color.rgb2hcl(this.rgb);
+ };
+
+ Color.prototype.hsi = function() {
+ return Color.rgb2hsi(this.rgb);
+ };
+
+ Color.prototype.interpolate = function(f, col, m) {
+ var dh, hue, hue0, hue1, lbv, lbv0, lbv1, me, sat, sat0, sat1, xyz0, xyz1;
+ me = this;
+ if (m == null) m = 'rgb';
+ if (type(col) === 'string') col = new Color(col);
+ if (m === 'hsl' || m === 'hsv' || m === 'hcl' || m === 'hsi') {
+ if (m === 'hsl') {
+ xyz0 = me.hsl();
+ xyz1 = col.hsl();
+ } else if (m === 'hsv') {
+ xyz0 = me.hsv();
+ xyz1 = col.hsv();
+ } else if (m === 'hcl') {
+ xyz0 = me.hcl();
+ xyz1 = col.hcl();
+ } else if (m === 'hsi') {
+ xyz0 = me.hsi();
+ xyz1 = col.hsi();
+ }
+ hue0 = xyz0[0], sat0 = xyz0[1], lbv0 = xyz0[2];
+ hue1 = xyz1[0], sat1 = xyz1[1], lbv1 = xyz1[2];
+ if (!isNaN(hue0) && !isNaN(hue1)) {
+ if (hue1 > hue0 && hue1 - hue0 > 180) {
+ dh = hue1 - (hue0 + 360);
+ } else if (hue1 < hue0 && hue0 - hue1 > 180) {
+ dh = hue1 + 360 - hue0;
+ } else {
+ dh = hue1 - hue0;
+ }
+ hue = hue0 + f * dh;
+ } else if (!isNaN(hue0)) {
+ hue = hue0;
+ if (lbv1 === 1 || lbv1 === 0) sat = sat0;
+ } else if (!isNaN(hue1)) {
+ hue = hue1;
+ if (lbv0 === 1 || lbv0 === 0) sat = sat1;
+ } else {
+ hue = void 0;
+ }
+ if (sat == null) sat = sat0 + f * (sat1 - sat0);
+ lbv = lbv0 + f * (lbv1 - lbv0);
+ return new Color(hue, sat, lbv, m);
+ } else if (m === 'rgb') {
+ xyz0 = me.rgb;
+ xyz1 = col.rgb;
+ return new Color(xyz0[0] + f * (xyz1[0] - xyz0[0]), xyz0[1] + f * (xyz1[1] - xyz0[1]), xyz0[2] + f * (xyz1[2] - xyz0[2]), m);
+ } else if (m === 'lab') {
+ xyz0 = me.lab();
+ xyz1 = col.lab();
+ return new Color(xyz0[0] + f * (xyz1[0] - xyz0[0]), xyz0[1] + f * (xyz1[1] - xyz0[1]), xyz0[2] + f * (xyz1[2] - xyz0[2]), m);
+ } else {
+ throw m + ' is not supported as a color mode';
+ }
+ };
+ return Color;
+ })();
+
+ Color.hex2rgb = function(hex) {
+ var b, g, r, u;
+ if (!hex.match(/^#?([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$/)) {
+ if ((chromato.colors != null) && chromato.colors[hex]) {
+ hex = chromato.colors[hex];
+ } else {
+ throw 'This color format is unknown: ' + hex;
+ }
+ }
+ if (hex.length === 4 || hex.length === 7) hex = hex.substr(1);
+ if (hex.length === 3) {
+ hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
+ }
+ u = parseInt(hex, 16);
+ r = u >> 16;
+ g = u >> 8 & 0xFF;
+ b = u & 0xFF;
+ return [r, g, b];
+ };
+
+ Color.rgb2hex = function(r, g, b) {
+ var str, u, _ref2;
+ if (r !== void 0 && r.length === 3) {
+ _ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
+ }
+ u = r << 16 | g << 8 | b;
+ str = '000000' + u.toString(16).toUpperCase();
+ return '#' + str.substr(str.length - 6);
+ };
+
+ Color.hsv2rgb = function(h, s, v) {
+ var b, f, g, i, l, p, q, r, t, _ref2, _ref3, _ref4, _ref5, _ref6, _ref7, _ref8;
+ if (type(h) === 'array' && h.length === 3) {
+ _ref2 = h, h = _ref2[0], s = _ref2[1], l = _ref2[2];
+ }
+ v *= 255;
+ if (s === 0 && isNaN(h)) {
+ r = g = b = v;
+ } else {
+ if (h === 360) h = 0;
+ if (h > 360) h -= 360;
+ if (h < 0) h += 360;
+ h /= 60;
+ i = Math.floor(h);
+ f = h - i;
+ p = v * (1 - s);
+ q = v * (1 - s * f);
+ t = v * (1 - s * (1 - f));
+ switch (i) {
+ case 0:
+ _ref3 = [v, t, p], r = _ref3[0], g = _ref3[1], b = _ref3[2];
+ break;
+ case 1:
+ _ref4 = [q, v, p], r = _ref4[0], g = _ref4[1], b = _ref4[2];
+ break;
+ case 2:
+ _ref5 = [p, v, t], r = _ref5[0], g = _ref5[1], b = _ref5[2];
+ break;
+ case 3:
+ _ref6 = [p, q, v], r = _ref6[0], g = _ref6[1], b = _ref6[2];
+ break;
+ case 4:
+ _ref7 = [t, p, v], r = _ref7[0], g = _ref7[1], b = _ref7[2];
+ break;
+ case 5:
+ _ref8 = [v, p, q], r = _ref8[0], g = _ref8[1], b = _ref8[2];
+ }
+ }
+ r = Math.round(r);
+ g = Math.round(g);
+ b = Math.round(b);
+ return [r, g, b];
+ };
+
+ Color.rgb2hsv = function(r, g, b) {
+ var delta, h, max, min, s, v, _ref2;
+ if (r !== void 0 && r.length === 3) {
+ _ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
+ }
+ min = Math.min(r, g, b);
+ max = Math.max(r, g, b);
+ delta = max - min;
+ v = max / 255.0;
+ s = delta / max;
+ if (s === 0) {
+ h = void 0;
+ s = 0;
+ } else {
+ if (r === max) h = (g - b) / delta;
+ if (g === max) h = 2 + (b - r) / delta;
+ if (b === max) h = 4 + (r - g) / delta;
+ h *= 60;
+ if (h < 0) h += 360;
+ }
+ return [h, s, v];
+ };
+
+ Color.hsl2rgb = function(h, s, l) {
+ var b, c, g, i, r, t1, t2, t3, _ref2, _ref3;
+ if (h !== void 0 && h.length === 3) {
+ _ref2 = h, h = _ref2[0], s = _ref2[1], l = _ref2[2];
+ }
+ if (s === 0) {
+ r = g = b = l * 255;
+ } else {
+ t3 = [0, 0, 0];
+ c = [0, 0, 0];
+ t2 = l < 0.5 ? l * (1 + s) : l + s - l * s;
+ t1 = 2 * l - t2;
+ h /= 360;
+ t3[0] = h + 1 / 3;
+ t3[1] = h;
+ t3[2] = h - 1 / 3;
+ for (i = 0; i <= 2; i++) {
+ if (t3[i] < 0) t3[i] += 1;
+ if (t3[i] > 1) t3[i] -= 1;
+ if (6 * t3[i] < 1) {
+ c[i] = t1 + (t2 - t1) * 6 * t3[i];
+ } else if (2 * t3[i] < 1) {
+ c[i] = t2;
+ } else if (3 * t3[i] < 2) {
+ c[i] = t1 + (t2 - t1) * ((2 / 3) - t3[i]) * 6;
+ } else {
+ c[i] = t1;
+ }
+ }
+ _ref3 = [Math.round(c[0] * 255), Math.round(c[1] * 255), Math.round(c[2] * 255)], r = _ref3[0], g = _ref3[1], b = _ref3[2];
+ }
+ return [r, g, b];
+ };
+
+ Color.rgb2hsl = function(r, g, b) {
+ var h, l, max, min, s, _ref2;
+ if (r !== void 0 && r.length === 3) {
+ _ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
+ }
+ r /= 255;
+ g /= 255;
+ b /= 255;
+ min = Math.min(r, g, b);
+ max = Math.max(r, g, b);
+ l = (max + min) / 2;
+ if (max === min) {
+ s = 0;
+ h = void 0;
+ } else {
+ s = l < 0.5 ? (max - min) / (max + min) : (max - min) / (2 - max - min);
+ }
+ if (r === max) {
+ h = (g - b) / (max - min);
+ } else if (g === max) {
+ h = 2 + (b - r) / (max - min);
+ } else if (b === max) {
+ h = 4 + (r - g) / (max - min);
+ }
+ h *= 60;
+ if (h < 0) h += 360;
+ return [h, s, l];
+ };
+
+ Color.lab2xyz = function(l, a, b) {
+ var finv, ill, sl, x, y, z, _ref2;
+ if (type(l) === 'array' && l.length === 3) {
+ _ref2 = l, l = _ref2[0], a = _ref2[1], b = _ref2[2];
+ }
+ finv = function(t) {
+ if (t > (6.0 / 29.0)) {
+ return t * t * t;
+ } else {
+ return 3 * (6.0 / 29.0) * (6.0 / 29.0) * (t - 4.0 / 29.0);
+ }
+ };
+ sl = (l + 0.16) / 1.16;
+ ill = [0.96421, 1.00000, 0.82519];
+ y = ill[1] * finv(sl);
+ x = ill[0] * finv(sl + (a / 5.0));
+ z = ill[2] * finv(sl - (b / 2.0));
+ return [x, y, z];
+ };
+
+ Color.xyz2rgb = function(x, y, z) {
+ var b, bl, clip, correct, g, gl, r, rl, _ref2, _ref3;
+ if (type(x) === 'array' && x.length === 3) {
+ _ref2 = x, x = _ref2[0], y = _ref2[1], z = _ref2[2];
+ }
+ rl = 3.2406 * x - 1.5372 * y - 0.4986 * z;
+ gl = -0.9689 * x + 1.8758 * y + 0.0415 * z;
+ bl = 0.0557 * x - 0.2040 * y + 1.0570 * z;
+ clip = Math.min(rl, gl, bl) < -0.001 || Math.max(rl, gl, bl) > 1.001;
+ if (clip) {
+ rl = rl < 0.0 ? 0.0 : rl > 1.0 ? 1.0 : rl;
+ gl = gl < 0.0 ? 0.0 : gl > 1.0 ? 1.0 : gl;
+ bl = bl < 0.0 ? 0.0 : bl > 1.0 ? 1.0 : bl;
+ }
+ if (clip) {
+ _ref3 = [void 0, void 0, void 0], rl = _ref3[0], gl = _ref3[1], bl = _ref3[2];
+ }
+ correct = function(cl) {
+ var a;
+ a = 0.055;
+ if (cl <= 0.0031308) {
+ return 12.92 * cl;
+ } else {
+ return (1 + a) * Math.pow(cl, 1 / 2.4) - a;
+ }
+ };
+ r = Math.round(255.0 * correct(rl));
+ g = Math.round(255.0 * correct(gl));
+ b = Math.round(255.0 * correct(bl));
+ return [r, g, b];
+ };
+
+ Color.lab2rgb = function(l, a, b) {
+ var x, y, z, _ref2, _ref3, _ref4;
+ if (l !== void 0 && l.length === 3) {
+ _ref2 = l, l = _ref2[0], a = _ref2[1], b = _ref2[2];
+ }
+ if (l !== void 0 && l.length === 3) {
+ _ref3 = l, l = _ref3[0], a = _ref3[1], b = _ref3[2];
+ }
+ _ref4 = Color.lab2xyz(l, a, b), x = _ref4[0], y = _ref4[1], z = _ref4[2];
+ return Color.xyz2rgb(x, y, z);
+ };
+
+ Color.hcl2lab = function(c, s, l) {
+ var L, tau_const, a, angle, b, r, _ref2;
+ if (type(c) === 'array' && c.length === 3) {
+ _ref2 = c, c = _ref2[0], s = _ref2[1], l = _ref2[2];
+ }
+ c /= 360.0;
+ tau_const = 6.283185307179586476925287;
+ L = l * 0.61 + 0.09;
+ angle = tau_const / 6.0 - c * tau_const;
+ r = (l * 0.311 + 0.125) * s;
+ a = Math.sin(angle) * r;
+ b = Math.cos(angle) * r;
+ return [L, a, b];
+ };
+
+ Color.hcl2rgb = function(c, s, l) {
+ var L, a, b, _ref2;
+ _ref2 = Color.hcl2lab(c, s, l), L = _ref2[0], a = _ref2[1], b = _ref2[2];
+ return Color.lab2rgb(L, a, b);
+ };
+
+ Color.rgb2xyz = function(r, g, b) {
+ var bl, correct, gl, rl, x, y, z, _ref2;
+ if (r !== void 0 && r.length === 3) {
+ _ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
+ }
+ correct = function(c) {
+ var a;
+ a = 0.055;
+ if (c <= 0.04045) {
+ return c / 12.92;
+ } else {
+ return Math.pow((c + a) / (1 + a), 2.4);
+ }
+ };
+ rl = correct(r / 255.0);
+ gl = correct(g / 255.0);
+ bl = correct(b / 255.0);
+ x = 0.4124 * rl + 0.3576 * gl + 0.1805 * bl;
+ y = 0.2126 * rl + 0.7152 * gl + 0.0722 * bl;
+ z = 0.0193 * rl + 0.1192 * gl + 0.9505 * bl;
+ return [x, y, z];
+ };
+
+ Color.xyz2lab = function(x, y, z) {
+ var a, b, f, ill, l, _ref2;
+ if (x !== void 0 && x.length === 3) {
+ _ref2 = x, x = _ref2[0], y = _ref2[1], z = _ref2[2];
+ }
+ ill = [0.96421, 1.00000, 0.82519];
+ f = function(t) {
+ if (t > Math.pow(6.0 / 29.0, 3)) {
+ return Math.pow(t, 1 / 3);
+ } else {
+ return (1 / 3) * (29 / 6) * (29 / 6) * t + 4.0 / 29.0;
+ }
+ };
+ l = 1.16 * f(y / ill[1]) - 0.16;
+ a = 5 * (f(x / ill[0]) - f(y / ill[1]));
+ b = 2 * (f(y / ill[1]) - f(z / ill[2]));
+ return [l, a, b];
+ };
+
+ Color.rgb2lab = function(r, g, b) {
+ var x, y, z, _ref2, _ref3;
+ if (r !== void 0 && r.length === 3) {
+ _ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
+ }
+ _ref3 = Color.rgb2xyz(r, g, b), x = _ref3[0], y = _ref3[1], z = _ref3[2];
+ return Color.xyz2lab(x, y, z);
+ };
+
+ Color.lab2hcl = function(l, a, b) {
+ var L, tau_const, angle, c, r, s, _ref2;
+ if (type(l) === 'array' && l.length === 3) {
+ _ref2 = l, l = _ref2[0], a = _ref2[1], b = _ref2[2];
+ }
+ L = l;
+ l = (l - 0.09) / 0.61;
+ r = Math.sqrt(a * a + b * b);
+ s = r / (l * 0.311 + 0.125);
+ tau_const = 6.283185307179586476925287;
+ angle = Math.atan2(a, b);
+ c = (tau_const / 6 - angle) / tau_const;
+ c *= 360;
+ if (c < 0) c += 360;
+ return [c, s, l];
+ };
+
+ Color.rgb2hcl = function(r, g, b) {
+ var a, l, _ref2, _ref3;
+ if (type(r) === 'array' && r.length === 3) {
+ _ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
+ }
+ _ref3 = Color.rgb2lab(r, g, b), l = _ref3[0], a = _ref3[1], b = _ref3[2];
+ return Color.lab2hcl(l, a, b);
+ };
+
+ Color.rgb2hsi = function(r, g, b) {
+ var pi_const_x2, h, i, min, s, _ref2;
+ if (type(r) === 'array' && r.length === 3) {
+ _ref2 = r, r = _ref2[0], g = _ref2[1], b = _ref2[2];
+ }
+ pi_const_x2 = Math.PI * 2;
+ r /= 255;
+ g /= 255;
+ b /= 255;
+ min = Math.min(r, g, b);
+ i = (r + g + b) / 3;
+ s = 1 - min / i;
+ if (s === 0) {
+ h = 0;
+ } else {
+ h = ((r - g) + (r - b)) / 2;
+ h /= Math.sqrt((r - g) * (r - g) + (r - b) * (g - b));
+ h = Math.acos(h);
+ if (b > g) h = pi_const_x2 - h;
+ h /= pi_const_x2;
+ }
+ return [h * 360, s, i];
+ };
+
+ Color.hsi2rgb = function(h, s, i) {
+ var pi_const_div3, pi_const_x2, b, cos, g, r, _ref2;
+ if (type(h) === 'array' && h.length === 3) {
+ _ref2 = h, h = _ref2[0], s = _ref2[1], i = _ref2[2];
+ }
+ pi_const_x2 = Math.PI * 2;
+ pi_const_div3 = Math.PI / 3;
+ cos = Math.cos;
+ if (h < 0) h += 360;
+ if (h > 360) h -= 360;
+ h /= 360;
+ if (h < 1 / 3) {
+ b = (1 - s) / 3;
+ r = (1 + s * cos(pi_const_x2 * h) / cos(pi_const_div3 - pi_const_x2 * h)) / 3;
+ g = 1 - (b + r);
+ } else if (h < 2 / 3) {
+ h -= 1 / 3;
+ r = (1 - s) / 3;
+ g = (1 + s * cos(pi_const_x2 * h) / cos(pi_const_div3 - pi_const_x2 * h)) / 3;
+ b = 1 - (r + g);
+ } else {
+ h -= 2 / 3;
+ g = (1 - s) / 3;
+ b = (1 + s * cos(pi_const_x2 * h) / cos(pi_const_div3 - pi_const_x2 * h)) / 3;
+ r = 1 - (g + b);
+ }
+ r = i * r * 3;
+ g = i * g * 3;
+ b = i * b * 3;
+ return [r * 255, g * 255, b * 255];
+ };
+
+ chromato.Color = Color;
+
+ chromato.hsl = function(h, s, l) {
+ return new Color(h, s, l, 'hsl');
+ };
+
+ chromato.hsv = function(h, s, v) {
+ return new Color(h, s, v, 'hsv');
+ };
+
+ chromato.rgb = function(r, g, b) {
+ return new Color(r, g, b, 'rgb');
+ };
+
+ chromato.hex = function(x) {
+ return new Color(x);
+ };
+
+ chromato.lab = function(l, a, b) {
+ return new Color(l, a, b, 'lab');
+ };
+
+ chromato.hcl = function(c, s, l) {
+ return new Color(c, s, l, 'hcl');
+ };
+
+ chromato.hsi = function(h, s, i) {
+ return new Color(h, s, i, 'hsi');
+ };
+
+ chromato.interpolate = function(a, b, f, m) {
+ if (type(a) === 'string') a = new Color(a);
+ if (type(b) === 'string') b = new Color(b);
+ return a.interpolate(f, b, m);
+ };
+
+ ColorScale = (function() {
+
+ function ColorScale(opts) {
+ var c, col, cols, me, _ref2, _ref3, _ref4, _ref5, _ref6, _ref7;
+ me = this;
+ me.colors = cols = (_ref2 = opts.colors) != null ? _ref2 : ['#ddd', '#222'];
+ for (c = 0, _ref3 = cols.length - 1; 0 <= _ref3 ? c <= _ref3 : c >= _ref3; 0 <= _ref3 ? c++ : c--) {
+ col = cols[c];
+ if (type(col) === 'string') cols[c] = new Color(col);
+ }
+ if (opts.positions != null) {
+ me.pos = opts.positions;
+ } else {
+ me.pos = [];
+ for (c = 0, _ref4 = cols.length - 1; 0 <= _ref4 ? c <= _ref4 : c >= _ref4; 0 <= _ref4 ? c++ : c--) {
+ me.pos.push(c / (cols.length - 1));
+ }
+ }
+ me.mode = (_ref5 = opts.mode) != null ? _ref5 : 'hsv';
+ me.nacol = (_ref6 = opts.nacol) != null ? _ref6 : '#ccc';
+ me.setClasses((_ref7 = opts.limits) != null ? _ref7 : [0, 1]);
+ me;
+ }
+
+ ColorScale.prototype.getColor = function(value) {
+ var c, f, f0, me;
+ me = this;
+ if (isNaN(value)) return me.nacol;
+ if (me.classLimits.length > 2) {
+ c = me.getClass(value);
+ f = c / (me.numClasses - 1);
+ } else {
+ f = f0 = (value - me.min) / (me.max - me.min);
+ f = Math.min(1, Math.max(0, f));
+ }
+ return me.fColor(f);
+ };
+
+ ColorScale.prototype.fColor = function(f) {
+ var col, cols, i, me, p, _ref2;
+ me = this;
+ cols = me.colors;
+ for (i = 0, _ref2 = me.pos.length - 1; 0 <= _ref2 ? i <= _ref2 : i >= _ref2; 0 <= _ref2 ? i++ : i--) {
+ p = me.pos[i];
+ if (f <= p) {
+ col = cols[i];
+ break;
+ }
+ if (f >= p && i === me.pos.length - 1) {
+ col = cols[i];
+ break;
+ }
+ if (f > p && f < me.pos[i + 1]) {
+ f = (f - p) / (me.pos[i + 1] - p);
+ col = chromato.interpolate(cols[i], cols[i + 1], f, me.mode);
+ break;
+ }
+ }
+ return col;
+ };
+
+ ColorScale.prototype.classifyValue = function(value) {
+ var i, limits, maxc, minc, n, self;
+ self = this;
+ limits = self.classLimits;
+ if (limits.length > 2) {
+ n = limits.length - 1;
+ i = self.getClass(value);
+ value = limits[i] + (limits[i + 1] - limits[i]) * 0.5;
+ minc = limits[0];
+ maxc = limits[n - 1];
+ value = self.min + ((value - minc) / (maxc - minc)) * (self.max - self.min);
+ }
+ return value;
+ };
+
+ ColorScale.prototype.setClasses = function(limits) {
+ var me;
+ if (limits == null) limits = [];
+ me = this;
+ me.classLimits = limits;
+ me.min = limits[0];
+ me.max = limits[limits.length - 1];
+ if (limits.length === 2) {
+ return me.numClasses = 0;
+ } else {
+ return me.numClasses = limits.length - 1;
+ }
+ };
+
+ ColorScale.prototype.getClass = function(value) {
+ var i, limits, n, self;
+ self = this;
+ limits = self.classLimits;
+ if (limits != null) {
+ n = limits.length - 1;
+ i = 0;
+ while (i < n && value >= limits[i]) {
+ i++;
+ }
+ return i - 1;
+ }
+ };
+
+ ColorScale.prototype.validValue = function(value) {
+ return !isNaN(value);
+ };
+ return ColorScale;
+ })();
+
+ chromato.ColorScale = ColorScale;
+
+ Ramp = (function() {
+ __extends(Ramp, ColorScale);
+
+ function Ramp(col0, col1, mode) {
+ if (col0 == null) col0 = '#fe0000';
+ if (col1 == null) col1 = '#feeeee';
+ if (mode == null) mode = 'hsl';
+ Ramp.__super__.constructor.call(this, [col0, col1], [0, 1], mode);
+ }
+ return Ramp;
+ })();
+
+ chromato.Ramp = Ramp;
+
+ Categories = (function() {
+ __extends(Categories, ColorScale);
+
+ function Categories(colors) {
+ var me;
+ me = this;
+ me.colors = colors;
+ }
+
+ Categories.prototype.parseData = function(data, data_col) {};
+
+ Categories.prototype.getColor = function(value) {
+ var me;
+ me = this;
+ if (me.colors.hasOwnProperty(value)) {
+ return me.colors[value];
+ } else {
+ return '#cccccc';
+ }
+ };
+
+ Categories.prototype.validValue = function(value) {
+ return this.colors.hasOwnProperty(value);
+ };
+ return Categories;
+ })();
+
+ chromato.Categories = Categories;
+
+ CSSColors = (function() {
+ __extends(CSSColors, ColorScale);
+
+ function CSSColors(name) {
+ var me;
+ me = this;
+ me.name = name;
+ me.setClasses(7);
+ me;
+ }
+
+ CSSColors.prototype.getColor = function(value) {
+ var c, me;
+ me = this;
+ c = me.getClass(value);
+ return me.name + ' l' + me.numClasses + ' c' + c;
+ };
+
+ return CSSColors;
+ })();
+
+ chromato.CSSColors = CSSColors;
+
+ if ((_ref2 = chromato.scales) == null) chromato.scales = {};
+
+ chromato.limits = function(data, mode, num, prop) {
+ var assignments, best, centroids, cluster, clusterSizes, dist, i, j, k, kClusters, limits, max, min, mindist, n, nb_iters, newCentroids, p, pb, pr, repeat, row, sum, tmpKMeansBreaks, val, value, values, _i, _j, _k, _len, _len2, _len3, _ref10, _ref11, _ref12, _ref13, _ref14, _ref15, _ref16, _ref3, _ref4, _ref5, _ref6, _ref7, _ref8, _ref9;
+ if (mode == null) mode = 'equal';
+ if (num == null) num = 7;
+ if (prop == null) prop = null;
+ min = Number.MAX_VALUE;
+ max = Number.MAX_VALUE * -1;
+ sum = 0;
+ values = [];
+ if (type(data) === 'array') {
+ if (type(data[0]) !== 'object' && type(data[0]) !== 'array') {
+ for (_i = 0, _len = data.length; _i < _len; _i++) {
+ val = data[_i];
+ if (!isNaN(val)) values.push(Number(val));
+ }
+ } else {
+ for (_j = 0, _len2 = data.length; _j < _len2; _j++) {
+ row = data[_j];
+ values.push(Number(row[prop]));
+ }
+ }
+ } else if (type(data) === 'object') {
+ for (k in data) {
+ val = data[k];
+ if (type(val) === 'object' && type(prop) === 'string') {
+ if (!isNaN(val[prop])) values.push(Number(val[prop]));
+ } else if (type(val) === 'array' && type(prop) === 'number') {
+ if (!isNaN(val[prop])) values.push(Number(val[prop]));
+ } else if (type(val) === 'number') {
+ if (!isNaN(val)) values.push(Number(val));
+ }
+ }
+ }
+ for (_k = 0, _len3 = values.length; _k < _len3; _k++) {
+ val = values[_k];
+ if (!!isNaN(val)) continue;
+ if (val < min) min = val;
+ if (val > max) max = val;
+ sum += val;
+ }
+ values = values.sort(function(a, b) {
+ return a - b;
+ });
+ limits = [];
+ if (mode.substr(0, 1) === 'c') {
+ limits.push(min);
+ limits.push(max);
+ }
+ if (mode.substr(0, 1) === 'e') {
+ limits.push(min);
+ for (i = 1, _ref3 = num - 1; 1 <= _ref3 ? i <= _ref3 : i >= _ref3; 1 <= _ref3 ? i++ : i--) {
+ limits.push(min + (i / num) * (max - min));
+ }
+ limits.push(max);
+ } else if (mode.substr(0, 1) === 'q') {
+ limits.push(min);
+ for (i = 1, _ref4 = num - 1; 1 <= _ref4 ? i <= _ref4 : i >= _ref4; 1 <= _ref4 ? i++ : i--) {
+ p = values.length * i / num;
+ pb = Math.floor(p);
+ if (pb === p) {
+ limits.push(values[pb]);
+ } else {
+ pr = p - pb;
+ limits.push(values[pb] * pr + values[pb + 1] * (1 - pr));
+ }
+ }
+ limits.push(max);
+ } else if (mode.substr(0, 1) === 'k') {
+ n = values.length;
+ assignments = new Array(n);
+ clusterSizes = new Array(num);
+ repeat = true;
+ nb_iters = 0;
+ centroids = null;
+ centroids = [];
+ centroids.push(min);
+ for (i = 1, _ref5 = num - 1; 1 <= _ref5 ? i <= _ref5 : i >= _ref5; 1 <= _ref5 ? i++ : i--) {
+ centroids.push(min + (i / num) * (max - min));
+ }
+ centroids.push(max);
+ while (repeat) {
+ for (j = 0, _ref6 = num - 1; 0 <= _ref6 ? j <= _ref6 : j >= _ref6; 0 <= _ref6 ? j++ : j--) {
+ clusterSizes[j] = 0;
+ }
+ for (i = 0, _ref7 = n - 1; 0 <= _ref7 ? i <= _ref7 : i >= _ref7; 0 <= _ref7 ? i++ : i--) {
+ value = values[i];
+ mindist = Number.MAX_VALUE;
+ for (j = 0, _ref8 = num - 1; 0 <= _ref8 ? j <= _ref8 : j >= _ref8; 0 <= _ref8 ? j++ : j--) {
+ dist = Math.abs(centroids[j] - value);
+ if (dist < mindist) {
+ mindist = dist;
+ best = j;
+ }
+ }
+ clusterSizes[best]++;
+ assignments[i] = best;
+ }
+ newCentroids = new Array(num);
+ for (j = 0, _ref9 = num - 1; 0 <= _ref9 ? j <= _ref9 : j >= _ref9; 0 <= _ref9 ? j++ : j--) {
+ newCentroids[j] = null;
+ }
+ for (i = 0, _ref10 = n - 1; 0 <= _ref10 ? i <= _ref10 : i >= _ref10; 0 <= _ref10 ? i++ : i--) {
+ cluster = assignments[i];
+ if (newCentroids[cluster] === null) {
+ newCentroids[cluster] = values[i];
+ } else {
+ newCentroids[cluster] += values[i];
+ }
+ }
+ for (j = 0, _ref11 = num - 1; 0 <= _ref11 ? j <= _ref11 : j >= _ref11; 0 <= _ref11 ? j++ : j--) {
+ newCentroids[j] *= 1 / clusterSizes[j];
+ }
+ repeat = false;
+ for (j = 0, _ref12 = num - 1; 0 <= _ref12 ? j <= _ref12 : j >= _ref12; 0 <= _ref12 ? j++ : j--) {
+ if (newCentroids[j] !== centroids[i]) {
+ repeat = true;
+ break;
+ }
+ }
+ centroids = newCentroids;
+ nb_iters++;
+ if (nb_iters > 200) repeat = false;
+ }
+ kClusters = {};
+ for (j = 0, _ref13 = num - 1; 0 <= _ref13 ? j <= _ref13 : j >= _ref13; 0 <= _ref13 ? j++ : j--) {
+ kClusters[j] = [];
+ }
+ for (i = 0, _ref14 = n - 1; 0 <= _ref14 ? i <= _ref14 : i >= _ref14; 0 <= _ref14 ? i++ : i--) {
+ cluster = assignments[i];
+ kClusters[cluster].push(values[i]);
+ }
+ tmpKMeansBreaks = [];
+ for (j = 0, _ref15 = num - 1; 0 <= _ref15 ? j <= _ref15 : j >= _ref15; 0 <= _ref15 ? j++ : j--) {
+ tmpKMeansBreaks.push(kClusters[j][0]);
+ tmpKMeansBreaks.push(kClusters[j][kClusters[j].length - 1]);
+ }
+ tmpKMeansBreaks = tmpKMeansBreaks.sort(function(a, b) {
+ return a - b;
+ });
+ limits.push(tmpKMeansBreaks[0]);
+ for (i = 1, _ref16 = tmpKMeansBreaks.length - 1; i <= _ref16; i += 2) {
+ if (!isNaN(tmpKMeansBreaks[i])) limits.push(tmpKMeansBreaks[i]);
+ }
+ }
+ return limits;
+ };
+
+ root = typeof exports !== 'undefined' && exports !== null ? exports : this;
+
+ type = (function() {
+ var classToType, name, _i, _len, _ref3;
+ classToType = {};
+ _ref3 = 'Boolean Number String Function Array Date RegExp Undefined Null'.split(' ');
+ for (_i = 0, _len = _ref3.length; _i < _len; _i++) {
+ name = _ref3[_i];
+ classToType['[object ' + name + ']'] = name.toLowerCase();
+ }
+ return function(obj) {
+ var strType;
+ strType = Object.prototype.toString.call(obj);
+ return classToType[strType] || 'object';
+ };
+ })();
+
+ if ((_ref3 = root.type) == null) root.type = type;
+
+ Array.max = function(array) {
+ return Math.max.apply(Math, array);
+ };
+
+ Array.min = function(array) {
+ return Math.min.apply(Math, array);
+ };
+
+}).call(this);
+
+var createPalette = {
+ generate: function(colorsCount, checkColor, forceMode, quality, ultra_precision){
+ if(colorsCount === undefined)
+ colorsCount = 8;
+ if(checkColor === undefined)
+ checkColor = function(x){return true;};
+ if(forceMode === undefined)
+ forceMode = false;
+ if(quality === undefined)
+ quality = 50;
+ ultra_precision = ultra_precision || false
+
+ if(forceMode){
+ var colors = [];
+ function checkLab(lab){
+ var color = chromato.lab(lab[0], lab[1], lab[2]);
+ return !isNaN(color.rgb[0]) && color.rgb[0] >= 0 && color.rgb[1] >= 0 && color.rgb[2] >= 0 && color.rgb[0] < 256 && color.rgb[1] < 256 && color.rgb[2] < 256 && checkColor(color);
+ }
+
+ var vectors = {};
+ for(i = 0; i < colorsCount; i++){
+ var color = [Math.random(), 2 * Math.random() - 1, 2 * Math.random() - 1];
+ while(!checkLab(color)){
+ color = [Math.random(), 2 * Math.random() - 1, 2 * Math.random() - 1];
+ }
+ colors.push(color);
+ }
+
+ var repulsion = 0.3;
+ var speed = 0.05;
+ var steps = quality * 20;
+ while(steps-- > 0){
+ for(i = 0; i < colors.length; i++){
+ vectors[i] = {dl:0, da:0, db:0};
+ }
+ for(i = 0; i < colors.length; i++){
+ var color_a = colors[i];
+ for(j = 0; j < i; j++){
+ var color_b = colors[j];
+ var dl = color_a[0] - color_b[0];
+ var da = color_a[1] - color_b[1];
+ var db = color_a[2] - color_b[2];
+ var d = Math.sqrt(Math.pow(dl, 2) + Math.pow(da, 2) + Math.pow(db, 2));
+ if(d > 0){
+ var force = repulsion / Math.pow(d, 2);
+ vectors[i].dl += dl * force / d;
+ vectors[i].da += da * force / d;
+ vectors[i].db += db * force / d;
+ vectors[j].dl -= dl * force / d;
+ vectors[j].da -= da * force / d;
+ vectors[j].db -= db * force / d;
+ } else {
+ vectors[j].dl += 0.02 - 0.04 * Math.random();
+ vectors[j].da += 0.02 - 0.04 * Math.random();
+ vectors[j].db += 0.02 - 0.04 * Math.random();
+ }
+ }
+ }
+ for(i = 0; i < colors.length; i++){
+ var color = colors[i];
+ var displacement = speed * Math.sqrt(Math.pow(vectors[i].dl, 2) + Math.pow(vectors[i].da, 2) + Math.pow(vectors[i].db, 2));
+ if(displacement>0){
+ var ratio = speed * Math.min(0.1, displacement)/displacement;
+ candidateLab = [color[0] + vectors[i].dl * ratio, color[1] + vectors[i].da * ratio, color[2] + vectors[i].db * ratio];
+ if(checkLab(candidateLab)){
+ colors[i] = candidateLab;
+ }
+ }
+ }
+ }
+ return colors.map(function(lab){return chromato.lab(lab[0], lab[1], lab[2]);});
+ } else {
+ function checkColor2(color){
+ var lab = color.lab();
+ var hcl = color.hcl();
+ return !isNaN(color.rgb[0]) && color.rgb[0] >= 0 && color.rgb[1] >= 0 && color.rgb[2] >= 0 && color.rgb[0]<256 && color.rgb[1]<256 && color.rgb[2]<256 && checkColor(color);
+ }
+ var kMeans = [];
+ for(i = 0; i < colorsCount; i++){
+ var lab = [Math.random(), 2 * Math.random() - 1, 2 * Math.random() - 1];
+ while(!checkColor2(chromato.lab(lab))){
+ lab = [Math.random(), 2 * Math.random() - 1, 2 * Math.random() - 1];
+ }
+ kMeans.push(lab);
+ }
+ var colorSamples = [];
+ var samplesClosest = [];
+ if(ultra_precision){
+ for(l = 0; l <= 1; l += 0.01){
+ for(a =- 1; a <= 1; a += 0.05){
+ for(b =- 1; b <= 1; b += 0.05){
+ if(checkColor2(chromato.lab(l, a, b))){
+ colorSamples.push([l, a, b]);
+ samplesClosest.push(null);
+ }
+ }
+ }
+ }
+ } else {
+ for(l = 0; l <= 1; l += 0.05){
+ for(a =- 1; a <= 1; a += 0.1){
+ for(b =- 1; b <= 1; b += 0.1){
+ if(checkColor2(chromato.lab(l, a, b))){
+ colorSamples.push([l, a, b]);
+ samplesClosest.push(null);
+ }
+ }
+ }
+ }
+ }
+ var steps = quality;
+ while(steps-- > 0){
+ for(i = 0; i < colorSamples.length; i++){
+ var lab = colorSamples[i];
+ var min_dist = 1000000;
+ for(j = 0; j < kMeans.length; j++){
+ var kMean = kMeans[j];
+ var distance = Math.sqrt(Math.pow(lab[0] - kMean[0], 2) + Math.pow(lab[1]-kMean[1], 2) + Math.pow(lab[2] - kMean[2], 2));
+ if(distance < min_dist){
+ min_dist = distance;
+ samplesClosest[i] = j;
+ }
+ }
+ }
+ var freeColorSamples = colorSamples.slice(0);
+ for(j = 0; j < kMeans.length; j++){
+ var count = 0;
+ var candidateKMean = [0, 0, 0];
+ for(i = 0; i < colorSamples.length; i++){
+ if(samplesClosest[i] == j){
+ count++;
+ candidateKMean[0] += colorSamples[i][0];
+ candidateKMean[1] += colorSamples[i][1];
+ candidateKMean[2] += colorSamples[i][2];
+ }
+ }
+ if(count != 0){
+ candidateKMean[0] /= count;
+ candidateKMean[1] /= count;
+ candidateKMean[2] /= count;
+ }
+ if(count != 0 && checkColor2(chromato.lab(candidateKMean[0], candidateKMean[1], candidateKMean[2])) && candidateKMean){
+ kMeans[j] = candidateKMean;
+ } else {
+ if(freeColorSamples.length>0){
+ var min_dist = 10000000000;
+ var closest = -1;
+ for(i = 0; i<freeColorSamples.length; i++){
+ var distance = Math.sqrt(Math.pow(freeColorSamples[i][0] - candidateKMean[0], 2) + Math.pow(freeColorSamples[i][1] - candidateKMean[1], 2) + Math.pow(freeColorSamples[i][2] - candidateKMean[2], 2));
+ if(distance < min_dist){
+ min_dist = distance;
+ closest = i;
+ }
+ }
+ kMeans[j] = colorSamples[closest];
+ } else {
+ var min_dist = 10000000000;
+ var closest = -1;
+ for(i = 0; i < colorSamples.length; i++){
+ var distance = Math.sqrt(Math.pow(colorSamples[i][0] - candidateKMean[0], 2) + Math.pow(colorSamples[i][1]-candidateKMean[1], 2) + Math.pow(colorSamples[i][2] - candidateKMean[2], 2));
+ if(distance < min_dist){
+ min_dist = distance;
+ closest = i;
+ }
+ }
+ kMeans[j] = colorSamples[closest];
+ }
+ }
+ freeColorSamples = freeColorSamples.filter(function(color){
+ return color[0] != kMeans[j][0]
+ || color[1] != kMeans[j][1]
+ || color[2] != kMeans[j][2];
+ });
+ }
+ }
+ return kMeans.map(function(lab){return chromato.lab(lab[0], lab[1], lab[2]);});
+ }
+ },
+
+ diffSort: function(colorsToSort){
+ var diffColors = [colorsToSort.shift()];
+ while(colorsToSort.length > 0){
+ var index = -1;
+ var maxDistance = -1;
+ for(candidate_index = 0; candidate_index < colorsToSort.length; candidate_index++){
+ var d = 1000000000;
+ for(i = 0; i < diffColors.length; i++){
+ var color_a = colorsToSort[candidate_index].lab();
+ var color_b = diffColors[i].lab();
+ var dl = color_a[0] - color_b[0];
+ var da = color_a[1] - color_b[1];
+ var db = color_a[2] - color_b[2];
+ d = Math.min(d, Math.sqrt(Math.pow(dl, 2)+Math.pow(da, 2)+Math.pow(db, 2)));
+ }
+ if(d > maxDistance){
+ maxDistance = d;
+ index = candidate_index;
+ }
+ }
+ var color = colorsToSort[index];
+ diffColors.push(color);
+ colorsToSort = colorsToSort.filter(function(c,i){return i != index;});
+ }
+ return diffColors;
+ }
+}
diff --git a/_freeze/site_libs/clipboard/clipboard.min.js b/_freeze/site_libs/clipboard/clipboard.min.js
@@ -0,0 +1,7 @@
+/*!
+ * clipboard.js v2.0.11
+ * https://clipboardjs.com/
+ *
+ * Licensed MIT © Zeno Rocha
+ */
+!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.ClipboardJS=e():t.ClipboardJS=e()}(this,function(){return n={686:function(t,e,n){"use strict";n.d(e,{default:function(){return b}});var e=n(279),i=n.n(e),e=n(370),u=n.n(e),e=n(817),r=n.n(e);function c(t){try{return document.execCommand(t)}catch(t){return}}var a=function(t){t=r()(t);return c("cut"),t};function o(t,e){var n,o,t=(n=t,o="rtl"===document.documentElement.getAttribute("dir"),(t=document.createElement("textarea")).style.fontSize="12pt",t.style.border="0",t.style.padding="0",t.style.margin="0",t.style.position="absolute",t.style[o?"right":"left"]="-9999px",o=window.pageYOffset||document.documentElement.scrollTop,t.style.top="".concat(o,"px"),t.setAttribute("readonly",""),t.value=n,t);return e.container.appendChild(t),e=r()(t),c("copy"),t.remove(),e}var f=function(t){var e=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{container:document.body},n="";return"string"==typeof t?n=o(t,e):t instanceof HTMLInputElement&&!["text","search","url","tel","password"].includes(null==t?void 0:t.type)?n=o(t.value,e):(n=r()(t),c("copy")),n};function l(t){return(l="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(t){return typeof t}:function(t){return t&&"function"==typeof Symbol&&t.constructor===Symbol&&t!==Symbol.prototype?"symbol":typeof t})(t)}var s=function(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:{},e=t.action,n=void 0===e?"copy":e,o=t.container,e=t.target,t=t.text;if("copy"!==n&&"cut"!==n)throw new Error('Invalid "action" value, use either "copy" or "cut"');if(void 0!==e){if(!e||"object"!==l(e)||1!==e.nodeType)throw new Error('Invalid "target" value, use a valid Element');if("copy"===n&&e.hasAttribute("disabled"))throw new Error('Invalid "target" attribute. 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+\ No newline at end of file
diff --git a/_freeze/site_libs/d3-3.3.8/LICENSE b/_freeze/site_libs/d3-3.3.8/LICENSE
@@ -0,0 +1,26 @@
+Copyright (c) 2010-2014, Michael Bostock
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+* The name Michael Bostock may not be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL MICHAEL BOSTOCK BE LIABLE FOR ANY DIRECT,
+INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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diff --git a/_freeze/site_libs/d3-3.5.6/LICENSE b/_freeze/site_libs/d3-3.5.6/LICENSE
@@ -0,0 +1,26 @@
+Copyright (c) 2010-2015, Michael Bostock
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+* The name Michael Bostock may not be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL MICHAEL BOSTOCK BE LIABLE FOR ANY DIRECT,
+INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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define&&define.amd?define(ta):"object"==typeof module&&module.exports&&(module.exports=ta),this.d3=ta}();
+\ No newline at end of file
diff --git a/_freeze/site_libs/dagre-0.4.0/LICENSE b/_freeze/site_libs/dagre-0.4.0/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2013 Chris Pettitt
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/_freeze/site_libs/dagre-0.4.0/dagre-d3.min.js b/_freeze/site_libs/dagre-0.4.0/dagre-d3.min.js
@@ -0,0 +1,27 @@
+!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.dagreD3=e()}}(function(){var define,module,exports;return function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({1:[function(require,module,exports){/**
+ * @license
+ * Copyright (c) 2012-2013 Chris Pettitt
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+module.exports={graphlib:require("./lib/graphlib"),dagre:require("./lib/dagre"),intersect:require("./lib/intersect"),render:require("./lib/render"),util:require("./lib/util"),version:require("./lib/version")}},{"./lib/dagre":8,"./lib/graphlib":9,"./lib/intersect":10,"./lib/render":23,"./lib/util":25,"./lib/version":26}],2:[function(require,module,exports){var util=require("./util");module.exports={"default":normal,normal:normal,vee:vee};function normal(parent,id,edge,type){var marker=parent.append("marker").attr("id",id).attr("viewBox","0 0 10 10").attr("refX",9).attr("refY",5).attr("markerUnits","strokeWidth").attr("markerWidth",8).attr("markerHeight",6).attr("orient","auto");var path=marker.append("path").attr("d","M 0 0 L 10 5 L 0 10 z").style("stroke-width",1).style("stroke-dasharray","1,0");util.applyStyle(path,edge[type+"Style"])}function vee(parent,id,edge,type){var marker=parent.append("marker").attr("id",id).attr("viewBox","0 0 10 10").attr("refX",9).attr("refY",5).attr("markerUnits","strokeWidth").attr("markerWidth",8).attr("markerHeight",6).attr("orient","auto");var path=marker.append("path").attr("d","M 0 0 L 10 5 L 0 10 L 4 5 z").style("stroke-width",1).style("stroke-dasharray","1,0");util.applyStyle(path,edge[type+"Style"])}},{"./util":25}],3:[function(require,module,exports){var util=require("./util");module.exports=createClusters;function createClusters(selection,g){var clusters=g.nodes().filter(function(v){return util.isSubgraph(g,v)}),svgClusters=selection.selectAll("g.cluster").data(clusters,function(v){return v});svgClusters.enter().append("g").attr("class","cluster").style("opacity",0).append("rect");util.applyTransition(svgClusters.exit(),g).style("opacity",0).remove();util.applyTransition(svgClusters,g).style("opacity",1);util.applyTransition(svgClusters.selectAll("rect"),g).attr("width",function(v){return g.node(v).width}).attr("height",function(v){return g.node(v).height}).attr("x",function(v){var node=g.node(v);return node.x-node.width/2}).attr("y",function(v){var node=g.node(v);return node.y-node.height/2})}},{"./util":25}],4:[function(require,module,exports){"use strict";var _=require("./lodash"),addLabel=require("./label/add-label"),util=require("./util"),d3=require("./d3");module.exports=createEdgeLabels;function createEdgeLabels(selection,g){var svgEdgeLabels=selection.selectAll("g.edgeLabel").data(g.edges(),function(e){return util.edgeToId(e)}).classed("update",true);svgEdgeLabels.selectAll("*").remove();svgEdgeLabels.enter().append("g").classed("edgeLabel",true).style("opacity",0);svgEdgeLabels.each(function(e){var edge=g.edge(e),label=addLabel(d3.select(this),g.edge(e),0,0).classed("label",true),bbox=label.node().getBBox();if(edge.labelId){label.attr("id",edge.labelId)}if(!_.has(edge,"width")){edge.width=bbox.width}if(!_.has(edge,"height")){edge.height=bbox.height}});util.applyTransition(svgEdgeLabels.exit(),g).style("opacity",0).remove();return svgEdgeLabels}},{"./d3":7,"./label/add-label":18,"./lodash":20,"./util":25}],5:[function(require,module,exports){"use strict";var _=require("./lodash"),intersectNode=require("./intersect/intersect-node"),util=require("./util"),d3=require("./d3");module.exports=createEdgePaths;function createEdgePaths(selection,g,arrows){var svgPaths=selection.selectAll("g.edgePath").data(g.edges(),function(e){return util.edgeToId(e)}).classed("update",true);enter(svgPaths,g);exit(svgPaths,g);util.applyTransition(svgPaths,g).style("opacity",1);svgPaths.each(function(e){var edge=g.edge(e);edge.elem=this;if(edge.id){d3.select(this).attr("id",edge.id)}});svgPaths.selectAll("path.path").each(function(e){var edge=g.edge(e);edge.arrowheadId=_.uniqueId("arrowhead");var domEdge=d3.select(this).attr("marker-end",function(){return"url(#"+edge.arrowheadId+")"}).style("fill","none");util.applyTransition(domEdge,g).attr("d",function(e){return calcPoints(g,e)});util.applyStyle(domEdge,edge.style)});svgPaths.selectAll("defs *").remove();svgPaths.selectAll("defs").each(function(e){var edge=g.edge(e),arrowhead=arrows[edge.arrowhead];arrowhead(d3.select(this),edge.arrowheadId,edge,"arrowhead")});return svgPaths}function calcPoints(g,e){var edge=g.edge(e),tail=g.node(e.v),head=g.node(e.w),points=edge.points.slice(1,edge.points.length-1);points.unshift(intersectNode(tail,points[0]));points.push(intersectNode(head,points[points.length-1]));return createLine(edge,points)}function createLine(edge,points){var line=d3.svg.line().x(function(d){return d.x}).y(function(d){return d.y});if(_.has(edge,"lineInterpolate")){line.interpolate(edge.lineInterpolate)}if(_.has(edge,"lineTension")){line.tension(Number(edge.lineTension))}return line(points)}function getCoords(elem){var bbox=elem.getBBox(),matrix=elem.getTransformToElement(elem.ownerSVGElement).translate(bbox.width/2,bbox.height/2);return{x:matrix.e,y:matrix.f}}function enter(svgPaths,g){var svgPathsEnter=svgPaths.enter().append("g").attr("class","edgePath").style("opacity",0);svgPathsEnter.append("path").attr("class","path").attr("d",function(e){var edge=g.edge(e),sourceElem=g.node(e.v).elem,points=_.range(edge.points.length).map(function(){return getCoords(sourceElem)});return createLine(edge,points)});svgPathsEnter.append("defs")}function exit(svgPaths,g){var svgPathExit=svgPaths.exit();util.applyTransition(svgPathExit,g).style("opacity",0).remove();util.applyTransition(svgPathExit.select("path.path"),g).attr("d",function(e){var source=g.node(e.v);if(source){var points=_.range(this.pathSegList.length).map(function(){return source});return createLine({},points)}else{return d3.select(this).attr("d")}})}},{"./d3":7,"./intersect/intersect-node":14,"./lodash":20,"./util":25}],6:[function(require,module,exports){"use strict";var _=require("./lodash"),addLabel=require("./label/add-label"),util=require("./util"),d3=require("./d3");module.exports=createNodes;function createNodes(selection,g,shapes){var simpleNodes=g.nodes().filter(function(v){return!util.isSubgraph(g,v)});var svgNodes=selection.selectAll("g.node").data(simpleNodes,function(v){return v}).classed("update",true);svgNodes.selectAll("*").remove();svgNodes.enter().append("g").attr("class","node").style("opacity",0);svgNodes.each(function(v){var node=g.node(v),thisGroup=d3.select(this),labelGroup=thisGroup.append("g").attr("class","label"),labelDom=addLabel(labelGroup,node),shape=shapes[node.shape],bbox=_.pick(labelDom.node().getBBox(),"width","height");node.elem=this;if(node.id){thisGroup.attr("id",node.id)}if(node.labelId){labelGroup.attr("id",node.labelId)}util.applyClass(thisGroup,node["class"],(thisGroup.classed("update")?"update ":"")+"node");if(_.has(node,"width")){bbox.width=node.width}if(_.has(node,"height")){bbox.height=node.height}bbox.width+=node.paddingLeft+node.paddingRight;bbox.height+=node.paddingTop+node.paddingBottom;labelGroup.attr("transform","translate("+(node.paddingLeft-node.paddingRight)/2+","+(node.paddingTop-node.paddingBottom)/2+")");var shapeSvg=shape(d3.select(this),bbox,node);util.applyStyle(shapeSvg,node.style);var shapeBBox=shapeSvg.node().getBBox();node.width=shapeBBox.width;node.height=shapeBBox.height});util.applyTransition(svgNodes.exit(),g).style("opacity",0).remove();return svgNodes}},{"./d3":7,"./label/add-label":18,"./lodash":20,"./util":25}],7:[function(require,module,exports){module.exports=window.d3},{}],8:[function(require,module,exports){var dagre;if(require){try{dagre=require("dagre")}catch(e){}}if(!dagre){dagre=window.dagre}module.exports=dagre},{dagre:27}],9:[function(require,module,exports){var graphlib;if(require){try{graphlib=require("graphlib")}catch(e){}}if(!graphlib){graphlib=window.graphlib}module.exports=graphlib},{graphlib:57}],10:[function(require,module,exports){module.exports={node:require("./intersect-node"),circle:require("./intersect-circle"),ellipse:require("./intersect-ellipse"),polygon:require("./intersect-polygon"),rect:require("./intersect-rect")}},{"./intersect-circle":11,"./intersect-ellipse":12,"./intersect-node":14,"./intersect-polygon":15,"./intersect-rect":16}],11:[function(require,module,exports){var intersectEllipse=require("./intersect-ellipse");module.exports=intersectCircle;function intersectCircle(node,rx,point){return intersectEllipse(node,rx,rx,point)}},{"./intersect-ellipse":12}],12:[function(require,module,exports){module.exports=intersectEllipse;function intersectEllipse(node,rx,ry,point){var cx=node.x;var cy=node.y;var px=cx-point.x;var py=cy-point.y;var det=Math.sqrt(rx*rx*py*py+ry*ry*px*px);var dx=Math.abs(rx*ry*px/det);if(point.x<cx){dx=-dx}var dy=Math.abs(rx*ry*py/det);if(point.y<cy){dy=-dy}return{x:cx+dx,y:cy+dy}}},{}],13:[function(require,module,exports){module.exports=intersectLine;function intersectLine(p1,p2,q1,q2){var a1,a2,b1,b2,c1,c2;var r1,r2,r3,r4;var denom,offset,num;var x,y;a1=p2.y-p1.y;b1=p1.x-p2.x;c1=p2.x*p1.y-p1.x*p2.y;r3=a1*q1.x+b1*q1.y+c1;r4=a1*q2.x+b1*q2.y+c1;if(r3!==0&&r4!==0&&sameSign(r3,r4)){return}a2=q2.y-q1.y;b2=q1.x-q2.x;c2=q2.x*q1.y-q1.x*q2.y;r1=a2*p1.x+b2*p1.yy+c2;r2=a2*p2.x+b2*p2.y+c2;if(r1!==0&&r2!==0&&sameSign(r1,r2)){return}denom=a1*b2-a2*b1;if(denom===0){return}offset=Math.abs(denom/2);num=b1*c2-b2*c1;x=num<0?(num-offset)/denom:(num+offset)/denom;num=a2*c1-a1*c2;y=num<0?(num-offset)/denom:(num+offset)/denom;return{x:x,y:y}}function sameSign(r1,r2){return r1*r2>0}},{}],14:[function(require,module,exports){module.exports=intersectNode;function intersectNode(node,point){return node.intersect(point)}},{}],15:[function(require,module,exports){var intersectLine=require("./intersect-line");module.exports=intersectPolygon;function intersectPolygon(node,polyPoints,point){var x1=node.x;var y1=node.y;var intersections=[];var minX=Number.POSITIVE_INFINITY,minY=Number.POSITIVE_INFINITY;polyPoints.forEach(function(entry){minX=Math.min(minX,entry.x);minY=Math.min(minY,entry.y)});var left=x1-node.width/2-minX;var top=y1-node.height/2-minY;for(var i=0;i<polyPoints.length;i++){var p1=polyPoints[i];var p2=polyPoints[i<polyPoints.length-1?i+1:0];var intersect=intersectLine(node,point,{x:left+p1.x,y:top+p1.y},{x:left+p2.x,y:top+p2.y});if(intersect){intersections.push(intersect)}}if(!intersections.length){console.log("NO INTERSECTION FOUND, RETURN NODE CENTER",node);return node}if(intersections.length>1){intersections.sort(function(p,q){var pdx=p.x-point.x,pdy=p.y-point.y,distp=Math.sqrt(pdx*pdx+pdy*pdy),qdx=q.x-point.x,qdy=q.y-point.y,distq=Math.sqrt(qdx*qdx+qdy*qdy);return distp<distq?-1:distp===distq?0:1})}return intersections[0]}},{"./intersect-line":13}],16:[function(require,module,exports){module.exports=intersectRect;function intersectRect(node,point){var x=node.x;var y=node.y;var dx=point.x-x;var dy=point.y-y;var w=node.width/2;var h=node.height/2;var sx,sy;if(Math.abs(dy)*w>Math.abs(dx)*h){if(dy<0){h=-h}sx=dy===0?0:h*dx/dy;sy=h}else{if(dx<0){w=-w}sx=w;sy=dx===0?0:w*dy/dx}return{x:x+sx,y:y+sy}}},{}],17:[function(require,module,exports){var util=require("../util");module.exports=addHtmlLabel;function addHtmlLabel(root,node){var fo=root.append("foreignObject").attr("width","100000");var div=fo.append("xhtml:div");var label=node.label;switch(typeof label){case"function":div.insert(label);break;case"object":div.insert(function(){return label});break;default:div.html(label)}util.applyStyle(div,node.labelStyle);div.style("display","inline-block");div.style("white-space","nowrap");var w,h;div.each(function(){w=this.clientWidth;h=this.clientHeight});fo.attr("width",w).attr("height",h);return fo}},{"../util":25}],18:[function(require,module,exports){var addTextLabel=require("./add-text-label"),addHtmlLabel=require("./add-html-label");module.exports=addLabel;function addLabel(root,node){var label=node.label;var labelSvg=root.append("g");if(typeof label!=="string"||node.labelType==="html"){addHtmlLabel(labelSvg,node)}else{addTextLabel(labelSvg,node)}var labelBBox=labelSvg.node().getBBox();labelSvg.attr("transform","translate("+-labelBBox.width/2+","+-labelBBox.height/2+")");return labelSvg}},{"./add-html-label":17,"./add-text-label":19}],19:[function(require,module,exports){var util=require("../util");module.exports=addTextLabel;function addTextLabel(root,node){var domNode=root.append("text");var lines=processEscapeSequences(node.label).split("\n");for(var i=0;i<lines.length;i++){domNode.append("tspan").attr("xml:space","preserve").attr("dy","1em").attr("x","1").text(lines[i])}util.applyStyle(domNode,node.labelStyle);return domNode}function processEscapeSequences(text){var newText="",escaped=false,ch;for(var i=0;i<text.length;++i){ch=text[i];if(escaped){switch(ch){case"n":newText+="\n";break;default:newText+=ch}escaped=false}else if(ch==="\\"){escaped=true}else{newText+=ch}}return newText}},{"../util":25}],20:[function(require,module,exports){var lodash;if(require){try{lodash=require("lodash")}catch(e){}}if(!lodash){lodash=window._}module.exports=lodash},{lodash:77}],21:[function(require,module,exports){"use strict";var util=require("./util"),d3=require("./d3"),_=require("./lodash");module.exports=positionEdgeLabels;function positionEdgeLabels(selection,g){var created=selection.filter(function(){return!d3.select(this).classed("update")});function translate(e){var edge=g.edge(e);return _.has(edge,"x")?"translate("+edge.x+","+edge.y+")":""}created.attr("transform",translate);util.applyTransition(selection,g).style("opacity",1).attr("transform",translate)}},{"./d3":7,"./lodash":20,"./util":25}],22:[function(require,module,exports){"use strict";var util=require("./util"),d3=require("./d3");module.exports=positionNodes;function positionNodes(selection,g){var created=selection.filter(function(){return!d3.select(this).classed("update")});function translate(v){var node=g.node(v);return"translate("+node.x+","+node.y+")"}created.attr("transform",translate);util.applyTransition(selection,g).style("opacity",1).attr("transform",translate)}},{"./d3":7,"./util":25}],23:[function(require,module,exports){var _=require("./lodash"),layout=require("./dagre").layout;module.exports=render;function render(){var createNodes=require("./create-nodes"),createClusters=require("./create-clusters"),createEdgeLabels=require("./create-edge-labels"),createEdgePaths=require("./create-edge-paths"),positionNodes=require("./position-nodes"),positionEdgeLabels=require("./position-edge-labels"),shapes=require("./shapes"),arrows=require("./arrows");var fn=function(svg,g){preProcessGraph(g);var outputGroup=createOrSelectGroup(svg,"output"),clustersGroup=createOrSelectGroup(outputGroup,"clusters"),edgePathsGroup=createOrSelectGroup(outputGroup,"edgePaths"),edgeLabels=createEdgeLabels(createOrSelectGroup(outputGroup,"edgeLabels"),g),nodes=createNodes(createOrSelectGroup(outputGroup,"nodes"),g,shapes);layout(g);positionNodes(nodes,g);positionEdgeLabels(edgeLabels,g);createEdgePaths(edgePathsGroup,g,arrows);createClusters(clustersGroup,g);postProcessGraph(g)};fn.createNodes=function(value){if(!arguments.length)return createNodes;createNodes=value;return fn};fn.createClusters=function(value){if(!arguments.length)return createClusters;createClusters=value;return fn};fn.createEdgeLabels=function(value){if(!arguments.length)return createEdgeLabels;createEdgeLabels=value;return fn};fn.createEdgePaths=function(value){if(!arguments.length)return createEdgePaths;createEdgePaths=value;return fn};fn.shapes=function(value){if(!arguments.length)return shapes;shapes=value;return fn};fn.arrows=function(value){if(!arguments.length)return arrows;arrows=value;return fn};return fn}var NODE_DEFAULT_ATTRS={paddingLeft:10,paddingRight:10,paddingTop:10,paddingBottom:10,rx:0,ry:0,shape:"rect"};var EDGE_DEFAULT_ATTRS={arrowhead:"normal",lineInterpolate:"linear"};function preProcessGraph(g){g.nodes().forEach(function(v){var node=g.node(v);if(!_.has(node,"label")){node.label=v}if(_.has(node,"paddingX")){_.defaults(node,{paddingLeft:node.paddingX,paddingRight:node.paddingX})}if(_.has(node,"paddingY")){_.defaults(node,{paddingTop:node.paddingY,paddingBottom:node.paddingY})}if(_.has(node,"padding")){_.defaults(node,{paddingLeft:node.padding,paddingRight:node.padding,paddingTop:node.padding,paddingBottom:node.padding})}_.defaults(node,NODE_DEFAULT_ATTRS);_.each(["paddingLeft","paddingRight","paddingTop","paddingBottom"],function(k){node[k]=Number(node[k])});if(_.has(node,"width")){node._prevWidth=node.width}if(_.has(node,"height")){node._prevHeight=node.height}});g.edges().forEach(function(e){var edge=g.edge(e);if(!_.has(edge,"label")){edge.label=""}_.defaults(edge,EDGE_DEFAULT_ATTRS)})}function postProcessGraph(g){_.each(g.nodes(),function(v){var node=g.node(v);if(_.has(node,"_prevWidth")){node.width=node._prevWidth}else{delete node.width}if(_.has(node,"_prevHeight")){node.height=node._prevHeight}else{delete node.height}delete node._prevWidth;delete node._prevHeight})}function createOrSelectGroup(root,name){var selection=root.select("g."+name);if(selection.empty()){selection=root.append("g").attr("class",name)}return selection}},{"./arrows":2,"./create-clusters":3,"./create-edge-labels":4,"./create-edge-paths":5,"./create-nodes":6,"./dagre":8,"./lodash":20,"./position-edge-labels":21,"./position-nodes":22,"./shapes":24}],24:[function(require,module,exports){"use strict";var intersectRect=require("./intersect/intersect-rect"),intersectEllipse=require("./intersect/intersect-ellipse"),intersectCircle=require("./intersect/intersect-circle");module.exports={rect:rect,ellipse:ellipse,circle:circle};function rect(parent,bbox,node){var shapeSvg=parent.insert("rect",":first-child").attr("rx",node.rx).attr("ry",node.ry).attr("x",-bbox.width/2).attr("y",-bbox.height/2).attr("width",bbox.width).attr("height",bbox.height);node.intersect=function(point){return intersectRect(node,point)};return shapeSvg}function ellipse(parent,bbox,node){var rx=bbox.width/2,ry=bbox.height/2,shapeSvg=parent.insert("ellipse",":first-child").attr("x",-bbox.width/2).attr("y",-bbox.height/2).attr("rx",rx).attr("ry",ry);node.intersect=function(point){return intersectEllipse(node,rx,ry,point)};return shapeSvg}function circle(parent,bbox,node){var r=Math.max(bbox.width,bbox.height)/2,shapeSvg=parent.insert("circle",":first-child").attr("x",-bbox.width/2).attr("y",-bbox.height/2).attr("r",r);node.intersect=function(point){return intersectCircle(node,r,point)};return shapeSvg}},{"./intersect/intersect-circle":11,"./intersect/intersect-ellipse":12,"./intersect/intersect-rect":16}],25:[function(require,module,exports){var _=require("./lodash");module.exports={isSubgraph:isSubgraph,edgeToId:edgeToId,applyStyle:applyStyle,applyClass:applyClass,applyTransition:applyTransition};function isSubgraph(g,v){return!!g.children(v).length}function edgeToId(e){return escapeId(e.v)+":"+escapeId(e.w)+":"+escapeId(e.name)}var ID_DELIM=/:/g;function escapeId(str){return str?String(str).replace(ID_DELIM,"\\:"):""}function applyStyle(dom,styleFn){if(styleFn){dom.attr("style",styleFn)}}function applyClass(dom,classFn,otherClasses){if(classFn){dom.attr("class",classFn).attr("class",otherClasses+" "+dom.attr("class"))}}function applyTransition(selection,g){var graph=g.graph();if(_.isPlainObject(graph)){var transition=graph.transition;if(_.isFunction(transition)){return transition(selection)}}return selection}},{"./lodash":20}],26:[function(require,module,exports){module.exports="0.4.0"},{}],27:[function(require,module,exports){module.exports={graphlib:require("./lib/graphlib"),layout:require("./lib/layout"),debug:require("./lib/debug"),util:{time:require("./lib/util").time,notime:require("./lib/util").notime},version:require("./lib/version")}},{"./lib/debug":32,"./lib/graphlib":33,"./lib/layout":35,"./lib/util":55,"./lib/version":56}],28:[function(require,module,exports){"use strict";var _=require("./lodash"),greedyFAS=require("./greedy-fas");module.exports={run:run,undo:undo};function run(g){var fas=g.graph().acyclicer==="greedy"?greedyFAS(g,weightFn(g)):dfsFAS(g);_.each(fas,function(e){var label=g.edge(e);g.removeEdge(e);label.forwardName=e.name;label.reversed=true;g.setEdge(e.w,e.v,label,_.uniqueId("rev"))});function weightFn(g){return function(e){return g.edge(e).weight}}}function dfsFAS(g){var fas=[],stack={},visited={};function dfs(v){if(_.has(visited,v)){return}visited[v]=true;stack[v]=true;_.each(g.outEdges(v),function(e){if(_.has(stack,e.w)){fas.push(e)}else{dfs(e.w)}});delete stack[v]}_.each(g.nodes(),dfs);return fas}function undo(g){_.each(g.edges(),function(e){var label=g.edge(e);if(label.reversed){g.removeEdge(e);var forwardName=label.forwardName;delete label.reversed;delete label.forwardName;g.setEdge(e.w,e.v,label,forwardName)}})}},{"./greedy-fas":34,"./lodash":36}],29:[function(require,module,exports){var _=require("./lodash"),util=require("./util");module.exports=addBorderSegments;function addBorderSegments(g){function dfs(v){var children=g.children(v),node=g.node(v);if(children.length){_.each(children,dfs)}if(_.has(node,"minRank")){node.borderLeft=[];node.borderRight=[];for(var rank=node.minRank,maxRank=node.maxRank+1;rank<maxRank;++rank){addBorderNode(g,"borderLeft","_bl",v,node,rank);addBorderNode(g,"borderRight","_br",v,node,rank)}}}_.each(g.children(),dfs)}function addBorderNode(g,prop,prefix,sg,sgNode,rank){var label={width:0,height:0,rank:rank},prev=sgNode[prop][rank-1],curr=util.addDummyNode(g,"border",label,prefix);sgNode[prop][rank]=curr;g.setParent(curr,sg);if(prev){g.setEdge(prev,curr,{weight:1})}}},{"./lodash":36,"./util":55}],30:[function(require,module,exports){"use strict";var _=require("./lodash");module.exports={adjust:adjust,undo:undo};function adjust(g){var rankDir=g.graph().rankdir.toLowerCase();if(rankDir==="lr"||rankDir==="rl"){swapWidthHeight(g)}}function undo(g){var rankDir=g.graph().rankdir.toLowerCase();if(rankDir==="bt"||rankDir==="rl"){reverseY(g)}if(rankDir==="lr"||rankDir==="rl"){swapXY(g);swapWidthHeight(g)}}function swapWidthHeight(g){_.each(g.nodes(),function(v){swapWidthHeightOne(g.node(v))});_.each(g.edges(),function(e){swapWidthHeightOne(g.edge(e))})}function swapWidthHeightOne(attrs){var w=attrs.width;attrs.width=attrs.height;attrs.height=w}function reverseY(g){_.each(g.nodes(),function(v){reverseYOne(g.node(v))});_.each(g.edges(),function(e){var edge=g.edge(e);_.each(edge.points,reverseYOne);if(_.has(edge,"y")){reverseYOne(edge)}})}function reverseYOne(attrs){attrs.y=-attrs.y}function swapXY(g){_.each(g.nodes(),function(v){swapXYOne(g.node(v))});_.each(g.edges(),function(e){var edge=g.edge(e);_.each(edge.points,swapXYOne);if(_.has(edge,"x")){swapXYOne(edge)}})}function swapXYOne(attrs){var x=attrs.x;attrs.x=attrs.y;attrs.y=x}},{"./lodash":36}],31:[function(require,module,exports){module.exports=List;function List(){var sentinel={};sentinel._next=sentinel._prev=sentinel;this._sentinel=sentinel}List.prototype.dequeue=function(){var sentinel=this._sentinel,entry=sentinel._prev;if(entry!==sentinel){unlink(entry);return entry}};List.prototype.enqueue=function(entry){var sentinel=this._sentinel;if(entry._prev&&entry._next){unlink(entry)}entry._next=sentinel._next;sentinel._next._prev=entry;sentinel._next=entry;entry._prev=sentinel};List.prototype.toString=function(){var strs=[],sentinel=this._sentinel,curr=sentinel._prev;while(curr!==sentinel){strs.push(JSON.stringify(curr,filterOutLinks));curr=curr._prev}return"["+strs.join(", ")+"]"};function unlink(entry){entry._prev._next=entry._next;entry._next._prev=entry._prev;delete entry._next;delete entry._prev}function filterOutLinks(k,v){if(k!=="_next"&&k!=="_prev"){return v}}},{}],32:[function(require,module,exports){var _=require("./lodash"),util=require("./util"),Graph=require("./graphlib").Graph;module.exports={debugOrdering:debugOrdering};function debugOrdering(g){var layerMatrix=util.buildLayerMatrix(g);var h=new Graph({compound:true,multigraph:true}).setGraph({});_.each(g.nodes(),function(v){h.setNode(v,{label:v});h.setParent(v,"layer"+g.node(v).rank)});_.each(g.edges(),function(e){h.setEdge(e.v,e.w,{},e.name)});_.each(layerMatrix,function(layer,i){var layerV="layer"+i;h.setNode(layerV,{rank:"same"});_.reduce(layer,function(u,v){h.setEdge(u,v,{style:"invis"});return v})});return h}},{"./graphlib":33,"./lodash":36,"./util":55}],33:[function(require,module,exports){module.exports=require(9)},{"/Users/cpettitt/projects/dagre-d3/lib/graphlib.js":9,graphlib:57}],34:[function(require,module,exports){var _=require("./lodash"),Graph=require("./graphlib").Graph,List=require("./data/list");module.exports=greedyFAS;var DEFAULT_WEIGHT_FN=_.constant(1);function greedyFAS(g,weightFn){if(g.nodeCount()<=1){return[]}var state=buildState(g,weightFn||DEFAULT_WEIGHT_FN);var results=doGreedyFAS(state.graph,state.buckets,state.zeroIdx);return _.flatten(_.map(results,function(e){return g.outEdges(e.v,e.w)}),true)}function doGreedyFAS(g,buckets,zeroIdx){var results=[],sources=buckets[buckets.length-1],sinks=buckets[0];var entry;while(g.nodeCount()){while(entry=sinks.dequeue()){removeNode(g,buckets,zeroIdx,entry)}while(entry=sources.dequeue()){removeNode(g,buckets,zeroIdx,entry)}if(g.nodeCount()){for(var i=buckets.length-2;i>0;--i){entry=buckets[i].dequeue();if(entry){results=results.concat(removeNode(g,buckets,zeroIdx,entry,true));break}}}}return results}function removeNode(g,buckets,zeroIdx,entry,collectPredecessors){var results=collectPredecessors?[]:undefined;_.each(g.inEdges(entry.v),function(edge){var weight=g.edge(edge),uEntry=g.node(edge.v);if(collectPredecessors){results.push({v:edge.v,w:edge.w})}uEntry.out-=weight;assignBucket(buckets,zeroIdx,uEntry)});_.each(g.outEdges(entry.v),function(edge){var weight=g.edge(edge),w=edge.w,wEntry=g.node(w);wEntry["in"]-=weight;assignBucket(buckets,zeroIdx,wEntry)});g.removeNode(entry.v);return results}function buildState(g,weightFn){var fasGraph=new Graph,maxIn=0,maxOut=0;_.each(g.nodes(),function(v){fasGraph.setNode(v,{v:v,"in":0,out:0})});_.each(g.edges(),function(e){var prevWeight=fasGraph.edge(e.v,e.w)||0,weight=weightFn(e),edgeWeight=prevWeight+weight;fasGraph.setEdge(e.v,e.w,edgeWeight);maxOut=Math.max(maxOut,fasGraph.node(e.v).out+=weight);maxIn=Math.max(maxIn,fasGraph.node(e.w)["in"]+=weight)});var buckets=_.range(maxOut+maxIn+3).map(function(){return new List});var zeroIdx=maxIn+1;_.each(fasGraph.nodes(),function(v){assignBucket(buckets,zeroIdx,fasGraph.node(v))});return{graph:fasGraph,buckets:buckets,zeroIdx:zeroIdx}}function assignBucket(buckets,zeroIdx,entry){if(!entry.out){buckets[0].enqueue(entry)}else if(!entry["in"]){buckets[buckets.length-1].enqueue(entry)}else{buckets[entry.out-entry["in"]+zeroIdx].enqueue(entry)}}},{"./data/list":31,"./graphlib":33,"./lodash":36}],35:[function(require,module,exports){"use strict";var _=require("./lodash"),acyclic=require("./acyclic"),normalize=require("./normalize"),rank=require("./rank"),normalizeRanks=require("./util").normalizeRanks,parentDummyChains=require("./parent-dummy-chains"),removeEmptyRanks=require("./util").removeEmptyRanks,nestingGraph=require("./nesting-graph"),addBorderSegments=require("./add-border-segments"),coordinateSystem=require("./coordinate-system"),order=require("./order"),position=require("./position"),util=require("./util"),Graph=require("./graphlib").Graph;module.exports=layout;function layout(g,opts){var time=opts&&opts.debugTiming?util.time:util.notime;time("layout",function(){var layoutGraph=time(" buildLayoutGraph",function(){return buildLayoutGraph(g)});time(" runLayout",function(){runLayout(layoutGraph,time)});time(" updateInputGraph",function(){updateInputGraph(g,layoutGraph)})})}function runLayout(g,time){time(" makeSpaceForEdgeLabels",function(){makeSpaceForEdgeLabels(g)});time(" removeSelfEdges",function(){removeSelfEdges(g)});time(" acyclic",function(){acyclic.run(g)});time(" nestingGraph.run",function(){nestingGraph.run(g)});time(" rank",function(){rank(util.asNonCompoundGraph(g))});time(" injectEdgeLabelProxies",function(){injectEdgeLabelProxies(g)});time(" removeEmptyRanks",function(){removeEmptyRanks(g)});time(" nestingGraph.cleanup",function(){nestingGraph.cleanup(g)});time(" normalizeRanks",function(){normalizeRanks(g)});time(" assignRankMinMax",function(){assignRankMinMax(g)});time(" removeEdgeLabelProxies",function(){removeEdgeLabelProxies(g)});time(" normalize.run",function(){normalize.run(g)});time(" parentDummyChains",function(){parentDummyChains(g)});time(" addBorderSegments",function(){addBorderSegments(g)});time(" order",function(){order(g)});time(" insertSelfEdges",function(){insertSelfEdges(g)});time(" adjustCoordinateSystem",function(){coordinateSystem.adjust(g)});time(" position",function(){position(g)});time(" positionSelfEdges",function(){positionSelfEdges(g)});time(" removeBorderNodes",function(){removeBorderNodes(g)});time(" normalize.undo",function(){normalize.undo(g)});time(" fixupEdgeLabelCoords",function(){fixupEdgeLabelCoords(g)});time(" undoCoordinateSystem",function(){coordinateSystem.undo(g)});time(" translateGraph",function(){translateGraph(g)});time(" assignNodeIntersects",function(){assignNodeIntersects(g)});time(" reversePoints",function(){reversePointsForReversedEdges(g)});time(" acyclic.undo",function(){acyclic.undo(g)})}function updateInputGraph(inputGraph,layoutGraph){_.each(inputGraph.nodes(),function(v){var inputLabel=inputGraph.node(v),layoutLabel=layoutGraph.node(v);if(inputLabel){inputLabel.x=layoutLabel.x;inputLabel.y=layoutLabel.y;if(layoutGraph.children(v).length){inputLabel.width=layoutLabel.width;inputLabel.height=layoutLabel.height}}});_.each(inputGraph.edges(),function(e){var inputLabel=inputGraph.edge(e),layoutLabel=layoutGraph.edge(e);inputLabel.points=layoutLabel.points;if(_.has(layoutLabel,"x")){inputLabel.x=layoutLabel.x;inputLabel.y=layoutLabel.y}});inputGraph.graph().width=layoutGraph.graph().width;inputGraph.graph().height=layoutGraph.graph().height}var graphNumAttrs=["nodesep","edgesep","ranksep","marginx","marginy"],graphDefaults={ranksep:50,edgesep:20,nodesep:50,rankdir:"tb"},graphAttrs=["acyclicer","ranker","rankdir","align"],nodeNumAttrs=["width","height"],nodeDefaults={width:0,height:0},edgeNumAttrs=["minlen","weight","width","height","labeloffset"],edgeDefaults={minlen:1,weight:1,width:0,height:0,labeloffset:10,labelpos:"r"},edgeAttrs=["labelpos"];function buildLayoutGraph(inputGraph){var g=new Graph({multigraph:true,compound:true}),graph=canonicalize(inputGraph.graph());g.setGraph(_.merge({},graphDefaults,selectNumberAttrs(graph,graphNumAttrs),_.pick(graph,graphAttrs)));_.each(inputGraph.nodes(),function(v){var node=canonicalize(inputGraph.node(v));g.setNode(v,_.defaults(selectNumberAttrs(node,nodeNumAttrs),nodeDefaults));g.setParent(v,inputGraph.parent(v))});_.each(inputGraph.edges(),function(e){var edge=canonicalize(inputGraph.edge(e));g.setEdge(e,_.merge({},edgeDefaults,selectNumberAttrs(edge,edgeNumAttrs),_.pick(edge,edgeAttrs)))});return g}function makeSpaceForEdgeLabels(g){var graph=g.graph();graph.ranksep/=2;_.each(g.edges(),function(e){var edge=g.edge(e);edge.minlen*=2;if(edge.labelpos.toLowerCase()!=="c"){if(graph.rankdir==="TB"||graph.rankdir==="BT"){edge.width+=edge.labeloffset}else{edge.height+=edge.labeloffset}}})}function injectEdgeLabelProxies(g){_.each(g.edges(),function(e){var edge=g.edge(e);if(edge.width&&edge.height){var v=g.node(e.v),w=g.node(e.w),label={rank:(w.rank-v.rank)/2+v.rank,e:e};util.addDummyNode(g,"edge-proxy",label,"_ep")}})}function assignRankMinMax(g){var maxRank=0;_.each(g.nodes(),function(v){var node=g.node(v);if(node.borderTop){node.minRank=g.node(node.borderTop).rank;node.maxRank=g.node(node.borderBottom).rank;maxRank=_.max(maxRank,node.maxRank)}});g.graph().maxRank=maxRank}function removeEdgeLabelProxies(g){_.each(g.nodes(),function(v){var node=g.node(v);if(node.dummy==="edge-proxy"){g.edge(node.e).labelRank=node.rank;g.removeNode(v)}})}function translateGraph(g){var minX=Number.POSITIVE_INFINITY,maxX=0,minY=Number.POSITIVE_INFINITY,maxY=0,graphLabel=g.graph(),marginX=graphLabel.marginx||0,marginY=graphLabel.marginy||0;function getExtremes(attrs){var x=attrs.x,y=attrs.y,w=attrs.width,h=attrs.height;
+minX=Math.min(minX,x-w/2);maxX=Math.max(maxX,x+w/2);minY=Math.min(minY,y-h/2);maxY=Math.max(maxY,y+h/2)}_.each(g.nodes(),function(v){getExtremes(g.node(v))});_.each(g.edges(),function(e){var edge=g.edge(e);if(_.has(edge,"x")){getExtremes(edge)}});minX-=marginX;minY-=marginY;_.each(g.nodes(),function(v){var node=g.node(v);node.x-=minX;node.y-=minY});_.each(g.edges(),function(e){var edge=g.edge(e);_.each(edge.points,function(p){p.x-=minX;p.y-=minY});if(_.has(edge,"x")){edge.x-=minX}if(_.has(edge,"y")){edge.y-=minY}});graphLabel.width=maxX-minX+marginX;graphLabel.height=maxY-minY+marginY}function assignNodeIntersects(g){_.each(g.edges(),function(e){var edge=g.edge(e),nodeV=g.node(e.v),nodeW=g.node(e.w),p1,p2;if(!edge.points){edge.points=[];p1=nodeW;p2=nodeV}else{p1=edge.points[0];p2=edge.points[edge.points.length-1]}edge.points.unshift(util.intersectRect(nodeV,p1));edge.points.push(util.intersectRect(nodeW,p2))})}function fixupEdgeLabelCoords(g){_.each(g.edges(),function(e){var edge=g.edge(e);if(_.has(edge,"x")){if(edge.labelpos==="l"||edge.labelpos==="r"){edge.width-=edge.labeloffset}switch(edge.labelpos){case"l":edge.x-=edge.width/2+edge.labeloffset;break;case"r":edge.x+=edge.width/2+edge.labeloffset;break}}})}function reversePointsForReversedEdges(g){_.each(g.edges(),function(e){var edge=g.edge(e);if(edge.reversed){edge.points.reverse()}})}function removeBorderNodes(g){_.each(g.nodes(),function(v){if(g.children(v).length){var node=g.node(v),t=g.node(node.borderTop),b=g.node(node.borderBottom),l=g.node(_.last(node.borderLeft)),r=g.node(_.last(node.borderRight));node.width=Math.abs(r.x-l.x);node.height=Math.abs(b.y-t.y);node.x=l.x+node.width/2;node.y=t.y+node.height/2}});_.each(g.nodes(),function(v){if(g.node(v).dummy==="border"){g.removeNode(v)}})}function removeSelfEdges(g){_.each(g.edges(),function(e){if(e.v===e.w){var node=g.node(e.v);if(!node.selfEdges){node.selfEdges=[]}node.selfEdges.push({e:e,label:g.edge(e)});g.removeEdge(e)}})}function insertSelfEdges(g){var layers=util.buildLayerMatrix(g);_.each(layers,function(layer){var orderShift=0;_.each(layer,function(v,i){var node=g.node(v);node.order=i+orderShift;_.each(node.selfEdges,function(selfEdge){util.addDummyNode(g,"selfedge",{width:selfEdge.label.width,height:selfEdge.label.height,rank:node.rank,order:i+ ++orderShift,e:selfEdge.e,label:selfEdge.label},"_se")});delete node.selfEdges})})}function positionSelfEdges(g){_.each(g.nodes(),function(v){var node=g.node(v);if(node.dummy==="selfedge"){var selfNode=g.node(node.e.v),x=selfNode.x+selfNode.width/2,y=selfNode.y,dx=node.x-x,dy=selfNode.height/2;g.setEdge(node.e,node.label);g.removeNode(v);node.label.points=[{x:x+2*dx/3,y:y-dy},{x:x+5*dx/6,y:y-dy},{x:x+dx,y:y},{x:x+5*dx/6,y:y+dy},{x:x+2*dx/3,y:y+dy}];node.label.x=node.x;node.label.y=node.y}})}function selectNumberAttrs(obj,attrs){return _.mapValues(_.pick(obj,attrs),Number)}function canonicalize(attrs){var newAttrs={};_.each(attrs,function(v,k){newAttrs[k.toLowerCase()]=v});return newAttrs}},{"./acyclic":28,"./add-border-segments":29,"./coordinate-system":30,"./graphlib":33,"./lodash":36,"./nesting-graph":37,"./normalize":38,"./order":43,"./parent-dummy-chains":48,"./position":50,"./rank":52,"./util":55}],36:[function(require,module,exports){module.exports=require(20)},{"/Users/cpettitt/projects/dagre-d3/lib/lodash.js":20,lodash:77}],37:[function(require,module,exports){var _=require("./lodash"),util=require("./util");module.exports={run:run,cleanup:cleanup};function run(g){var root=util.addDummyNode(g,"root",{},"_root"),depths=treeDepths(g),height=_.max(depths)-1,nodeSep=2*height+1;g.graph().nestingRoot=root;_.each(g.edges(),function(e){g.edge(e).minlen*=nodeSep});var weight=sumWeights(g)+1;_.each(g.children(),function(child){dfs(g,root,nodeSep,weight,height,depths,child)});g.graph().nodeRankFactor=nodeSep}function dfs(g,root,nodeSep,weight,height,depths,v){var children=g.children(v);if(!children.length){if(v!==root){g.setEdge(root,v,{weight:0,minlen:nodeSep})}return}var top=util.addBorderNode(g,"_bt"),bottom=util.addBorderNode(g,"_bb"),label=g.node(v);g.setParent(top,v);label.borderTop=top;g.setParent(bottom,v);label.borderBottom=bottom;_.each(children,function(child){dfs(g,root,nodeSep,weight,height,depths,child);var childNode=g.node(child),childTop=childNode.borderTop?childNode.borderTop:child,childBottom=childNode.borderBottom?childNode.borderBottom:child,thisWeight=childNode.borderTop?weight:2*weight,minlen=childTop!==childBottom?1:height-depths[v]+1;g.setEdge(top,childTop,{weight:thisWeight,minlen:minlen,nestingEdge:true});g.setEdge(childBottom,bottom,{weight:thisWeight,minlen:minlen,nestingEdge:true})});if(!g.parent(v)){g.setEdge(root,top,{weight:0,minlen:height+depths[v]})}}function treeDepths(g){var depths={};function dfs(v,depth){var children=g.children(v);if(children&&children.length){_.each(children,function(child){dfs(child,depth+1)})}depths[v]=depth}_.each(g.children(),function(v){dfs(v,1)});return depths}function sumWeights(g){return _.reduce(g.edges(),function(acc,e){return acc+g.edge(e).weight},0)}function cleanup(g){var graphLabel=g.graph();g.removeNode(graphLabel.nestingRoot);delete graphLabel.nestingRoot;_.each(g.edges(),function(e){var edge=g.edge(e);if(edge.nestingEdge){g.removeEdge(e)}})}},{"./lodash":36,"./util":55}],38:[function(require,module,exports){"use strict";var _=require("./lodash"),util=require("./util");module.exports={run:run,undo:undo};function run(g){g.graph().dummyChains=[];_.each(g.edges(),function(edge){normalizeEdge(g,edge)})}function normalizeEdge(g,e){var v=e.v,vRank=g.node(v).rank,w=e.w,wRank=g.node(w).rank,name=e.name,edgeLabel=g.edge(e),labelRank=edgeLabel.labelRank;if(wRank===vRank+1)return;g.removeEdge(e);var dummy,attrs,i;for(i=0,++vRank;vRank<wRank;++i,++vRank){edgeLabel.points=[];attrs={width:0,height:0,edgeLabel:edgeLabel,edgeObj:e,rank:vRank};dummy=util.addDummyNode(g,"edge",attrs,"_d");if(vRank===labelRank){attrs.width=edgeLabel.width;attrs.height=edgeLabel.height;attrs.dummy="edge-label";attrs.labelpos=edgeLabel.labelpos}g.setEdge(v,dummy,{weight:edgeLabel.weight},name);if(i===0){g.graph().dummyChains.push(dummy)}v=dummy}g.setEdge(v,w,{weight:edgeLabel.weight},name)}function undo(g){_.each(g.graph().dummyChains,function(v){var node=g.node(v),origLabel=node.edgeLabel,w;g.setEdge(node.edgeObj,origLabel);while(node.dummy){w=g.successors(v)[0];g.removeNode(v);origLabel.points.push({x:node.x,y:node.y});if(node.dummy==="edge-label"){origLabel.x=node.x;origLabel.y=node.y;origLabel.width=node.width;origLabel.height=node.height}v=w;node=g.node(v)}})}},{"./lodash":36,"./util":55}],39:[function(require,module,exports){var _=require("../lodash");module.exports=addSubgraphConstraints;function addSubgraphConstraints(g,cg,vs){var prev={},rootPrev;_.each(vs,function(v){var child=g.parent(v),parent,prevChild;while(child){parent=g.parent(child);if(parent){prevChild=prev[parent];prev[parent]=child}else{prevChild=rootPrev;rootPrev=child}if(prevChild&&prevChild!==child){cg.setEdge(prevChild,child);return}child=parent}})}},{"../lodash":36}],40:[function(require,module,exports){var _=require("../lodash");module.exports=barycenter;function barycenter(g,movable){return _.map(movable,function(v){var inV=g.inEdges(v);if(!inV.length){return{v:v}}else{var result=_.reduce(inV,function(acc,e){var edge=g.edge(e),nodeU=g.node(e.v);return{sum:acc.sum+edge.weight*nodeU.order,weight:acc.weight+edge.weight}},{sum:0,weight:0});return{v:v,barycenter:result.sum/result.weight,weight:result.weight}}})}},{"../lodash":36}],41:[function(require,module,exports){var _=require("../lodash"),Graph=require("../graphlib").Graph;module.exports=buildLayerGraph;function buildLayerGraph(g,rank,relationship){var root=createRootNode(g),result=new Graph({compound:true}).setGraph({root:root}).setDefaultNodeLabel(function(v){return g.node(v)});_.each(g.nodes(),function(v){var node=g.node(v),parent=g.parent(v);if(node.rank===rank||node.minRank<=rank&&rank<=node.maxRank){result.setNode(v);result.setParent(v,parent||root);_.each(g[relationship](v),function(e){var u=e.v===v?e.w:e.v,edge=result.edge(u,v),weight=!_.isUndefined(edge)?edge.weight:0;result.setEdge(u,v,{weight:g.edge(e).weight+weight})});if(_.has(node,"minRank")){result.setNode(v,{borderLeft:node.borderLeft[rank],borderRight:node.borderRight[rank]})}}});return result}function createRootNode(g){var v;while(g.hasNode(v=_.uniqueId("_root")));return v}},{"../graphlib":33,"../lodash":36}],42:[function(require,module,exports){"use strict";var _=require("../lodash");module.exports=crossCount;function crossCount(g,layering){var cc=0;for(var i=1;i<layering.length;++i){cc+=twoLayerCrossCount(g,layering[i-1],layering[i])}return cc}function twoLayerCrossCount(g,northLayer,southLayer){var southPos=_.zipObject(southLayer,_.map(southLayer,function(v,i){return i}));var southEntries=_.flatten(_.map(northLayer,function(v){return _.chain(g.outEdges(v)).map(function(e){return{pos:southPos[e.w],weight:g.edge(e).weight}}).sortBy("pos").value()}),true);var firstIndex=1;while(firstIndex<southLayer.length)firstIndex<<=1;var treeSize=2*firstIndex-1;firstIndex-=1;var tree=_.map(new Array(treeSize),function(){return 0});var cc=0;_.each(southEntries.forEach(function(entry){var index=entry.pos+firstIndex;tree[index]+=entry.weight;var weightSum=0;while(index>0){if(index%2){weightSum+=tree[index+1]}index=index-1>>1;tree[index]+=entry.weight}cc+=entry.weight*weightSum}));return cc}},{"../lodash":36}],43:[function(require,module,exports){"use strict";var _=require("../lodash"),initOrder=require("./init-order"),crossCount=require("./cross-count"),sortSubgraph=require("./sort-subgraph"),buildLayerGraph=require("./build-layer-graph"),addSubgraphConstraints=require("./add-subgraph-constraints"),Graph=require("../graphlib").Graph,util=require("../util");module.exports=order;function order(g){var maxRank=util.maxRank(g),downLayerGraphs=buildLayerGraphs(g,_.range(1,maxRank+1),"inEdges"),upLayerGraphs=buildLayerGraphs(g,_.range(maxRank-1,-1,-1),"outEdges");var layering=initOrder(g);assignOrder(g,layering);var bestCC=Number.POSITIVE_INFINITY,best;for(var i=0,lastBest=0;lastBest<4;++i,++lastBest){sweepLayerGraphs(i%2?downLayerGraphs:upLayerGraphs,i%4>=2);layering=util.buildLayerMatrix(g);var cc=crossCount(g,layering);if(cc<bestCC){lastBest=0;best=_.cloneDeep(layering);bestCC=cc}}assignOrder(g,best)}function buildLayerGraphs(g,ranks,relationship){return _.map(ranks,function(rank){return buildLayerGraph(g,rank,relationship)})}function sweepLayerGraphs(layerGraphs,biasRight){var cg=new Graph;_.each(layerGraphs,function(lg){var root=lg.graph().root;var sorted=sortSubgraph(lg,root,cg,biasRight);_.each(sorted.vs,function(v,i){lg.node(v).order=i});addSubgraphConstraints(lg,cg,sorted.vs)})}function assignOrder(g,layering){_.each(layering,function(layer){_.each(layer,function(v,i){g.node(v).order=i})})}},{"../graphlib":33,"../lodash":36,"../util":55,"./add-subgraph-constraints":39,"./build-layer-graph":41,"./cross-count":42,"./init-order":44,"./sort-subgraph":46}],44:[function(require,module,exports){"use strict";var _=require("../lodash");module.exports=initOrder;function initOrder(g){var visited={},simpleNodes=_.filter(g.nodes(),function(v){return!g.children(v).length}),maxRank=_.max(_.map(simpleNodes,function(v){return g.node(v).rank})),layers=_.map(_.range(maxRank+1),function(){return[]});function dfs(v){if(_.has(visited,v))return;visited[v]=true;var node=g.node(v);layers[node.rank].push(v);_.each(g.successors(v),dfs)}var orderedVs=_.sortBy(simpleNodes,function(v){return g.node(v).rank});_.each(orderedVs,dfs);return layers}},{"../lodash":36}],45:[function(require,module,exports){"use strict";var _=require("../lodash");module.exports=resolveConflicts;function resolveConflicts(entries,cg){var mappedEntries={};_.each(entries,function(entry,i){var tmp=mappedEntries[entry.v]={indegree:0,"in":[],out:[],vs:[entry.v],i:i};if(!_.isUndefined(entry.barycenter)){tmp.barycenter=entry.barycenter;tmp.weight=entry.weight}});_.each(cg.edges(),function(e){var entryV=mappedEntries[e.v],entryW=mappedEntries[e.w];if(!_.isUndefined(entryV)&&!_.isUndefined(entryW)){entryW.indegree++;entryV.out.push(mappedEntries[e.w])}});var sourceSet=_.filter(mappedEntries,function(entry){return!entry.indegree});return doResolveConflicts(sourceSet)}function doResolveConflicts(sourceSet){var entries=[];function handleIn(vEntry){return function(uEntry){if(uEntry.merged){return}if(_.isUndefined(uEntry.barycenter)||_.isUndefined(vEntry.barycenter)||uEntry.barycenter>=vEntry.barycenter){mergeEntries(vEntry,uEntry)}}}function handleOut(vEntry){return function(wEntry){wEntry["in"].push(vEntry);if(--wEntry.indegree===0){sourceSet.push(wEntry)}}}while(sourceSet.length){var entry=sourceSet.pop();entries.push(entry);_.each(entry["in"].reverse(),handleIn(entry));_.each(entry.out,handleOut(entry))}return _.chain(entries).filter(function(entry){return!entry.merged}).map(function(entry){return _.pick(entry,["vs","i","barycenter","weight"])}).value()}function mergeEntries(target,source){var sum=0,weight=0;if(target.weight){sum+=target.barycenter*target.weight;weight+=target.weight}if(source.weight){sum+=source.barycenter*source.weight;weight+=source.weight}target.vs=source.vs.concat(target.vs);target.barycenter=sum/weight;target.weight=weight;target.i=Math.min(source.i,target.i);source.merged=true}},{"../lodash":36}],46:[function(require,module,exports){var _=require("../lodash"),barycenter=require("./barycenter"),resolveConflicts=require("./resolve-conflicts"),sort=require("./sort");module.exports=sortSubgraph;function sortSubgraph(g,v,cg,biasRight){var movable=g.children(v),node=g.node(v),bl=node?node.borderLeft:undefined,br=node?node.borderRight:undefined,subgraphs={};if(bl){movable=_.filter(movable,function(w){return w!==bl&&w!==br})}var barycenters=barycenter(g,movable);_.each(barycenters,function(entry){if(g.children(entry.v).length){var subgraphResult=sortSubgraph(g,entry.v,cg,biasRight);subgraphs[entry.v]=subgraphResult;if(_.has(subgraphResult,"barycenter")){mergeBarycenters(entry,subgraphResult)}}});var entries=resolveConflicts(barycenters,cg);expandSubgraphs(entries,subgraphs);var result=sort(entries,biasRight);if(bl){result.vs=_.flatten([bl,result.vs,br],true);if(g.predecessors(bl).length){var blPred=g.node(g.predecessors(bl)[0]),brPred=g.node(g.predecessors(br)[0]);if(!_.has(result,"barycenter")){result.barycenter=0;result.weight=0}result.barycenter=(result.barycenter*result.weight+blPred.order+brPred.order)/(result.weight+2);result.weight+=2}}return result}function expandSubgraphs(entries,subgraphs){_.each(entries,function(entry){entry.vs=_.flatten(entry.vs.map(function(v){if(subgraphs[v]){return subgraphs[v].vs}return v}),true)})}function mergeBarycenters(target,other){if(!_.isUndefined(target.barycenter)){target.barycenter=(target.barycenter*target.weight+other.barycenter*other.weight)/(target.weight+other.weight);target.weight+=other.weight}else{target.barycenter=other.barycenter;target.weight=other.weight}}},{"../lodash":36,"./barycenter":40,"./resolve-conflicts":45,"./sort":47}],47:[function(require,module,exports){var _=require("../lodash"),util=require("../util");module.exports=sort;function sort(entries,biasRight){var parts=util.partition(entries,function(entry){return _.has(entry,"barycenter")});var sortable=parts.lhs,unsortable=_.sortBy(parts.rhs,function(entry){return-entry.i}),vs=[],sum=0,weight=0,vsIndex=0;sortable.sort(compareWithBias(!!biasRight));vsIndex=consumeUnsortable(vs,unsortable,vsIndex);_.each(sortable,function(entry){vsIndex+=entry.vs.length;vs.push(entry.vs);sum+=entry.barycenter*entry.weight;weight+=entry.weight;vsIndex=consumeUnsortable(vs,unsortable,vsIndex)});var result={vs:_.flatten(vs,true)};if(weight){result.barycenter=sum/weight;result.weight=weight}return result}function consumeUnsortable(vs,unsortable,index){var last;while(unsortable.length&&(last=_.last(unsortable)).i<=index){unsortable.pop();vs.push(last.vs);index++}return index}function compareWithBias(bias){return function(entryV,entryW){if(entryV.barycenter<entryW.barycenter){return-1}else if(entryV.barycenter>entryW.barycenter){return 1}return!bias?entryV.i-entryW.i:entryW.i-entryV.i}}},{"../lodash":36,"../util":55}],48:[function(require,module,exports){var _=require("./lodash");module.exports=parentDummyChains;function parentDummyChains(g){var postorderNums=postorder(g);_.each(g.graph().dummyChains,function(v){var node=g.node(v),edgeObj=node.edgeObj,pathData=findPath(g,postorderNums,edgeObj.v,edgeObj.w),path=pathData.path,lca=pathData.lca,pathIdx=0,pathV=path[pathIdx],ascending=true;while(v!==edgeObj.w){node=g.node(v);if(ascending){while((pathV=path[pathIdx])!==lca&&g.node(pathV).maxRank<node.rank){pathIdx++}if(pathV===lca){ascending=false}}if(!ascending){while(pathIdx<path.length-1&&g.node(pathV=path[pathIdx+1]).minRank<=node.rank){pathIdx++}pathV=path[pathIdx]}g.setParent(v,pathV);v=g.successors(v)[0]}})}function findPath(g,postorderNums,v,w){var vPath=[],wPath=[],low=Math.min(postorderNums[v].low,postorderNums[w].low),lim=Math.max(postorderNums[v].lim,postorderNums[w].lim),parent,lca;parent=v;do{parent=g.parent(parent);vPath.push(parent)}while(parent&&(postorderNums[parent].low>low||lim>postorderNums[parent].lim));lca=parent;parent=w;while((parent=g.parent(parent))!==lca){wPath.push(parent)}return{path:vPath.concat(wPath.reverse()),lca:lca}}function postorder(g){var result={},lim=0;function dfs(v){var low=lim;_.each(g.children(v),dfs);result[v]={low:low,lim:lim++}}_.each(g.children(),dfs);return result}},{"./lodash":36}],49:[function(require,module,exports){"use strict";var _=require("../lodash"),Graph=require("../graphlib").Graph,util=require("../util");module.exports={positionX:positionX,findType1Conflicts:findType1Conflicts,findType2Conflicts:findType2Conflicts,addConflict:addConflict,hasConflict:hasConflict,verticalAlignment:verticalAlignment,horizontalCompaction:horizontalCompaction,alignCoordinates:alignCoordinates,findSmallestWidthAlignment:findSmallestWidthAlignment,balance:balance};function findType1Conflicts(g,layering){var conflicts={};function visitLayer(prevLayer,layer){var k0=0,scanPos=0,prevLayerLength=prevLayer.length,lastNode=_.last(layer);_.each(layer,function(v,i){var w=findOtherInnerSegmentNode(g,v),k1=w?g.node(w).order:prevLayerLength;if(w||v===lastNode){_.each(layer.slice(scanPos,i+1),function(scanNode){_.each(g.predecessors(scanNode),function(u){var uLabel=g.node(u),uPos=uLabel.order;if((uPos<k0||k1<uPos)&&!(uLabel.dummy&&g.node(scanNode).dummy)){addConflict(conflicts,u,scanNode)}})});scanPos=i+1;k0=k1}});return layer}_.reduce(layering,visitLayer);return conflicts}function findType2Conflicts(g,layering){var conflicts={};function scan(south,southPos,southEnd,prevNorthBorder,nextNorthBorder){var v;_.each(_.range(southPos,southEnd),function(i){v=south[i];if(g.node(v).dummy){_.each(g.predecessors(v),function(u){var uNode=g.node(u);if(uNode.dummy&&(uNode.order<prevNorthBorder||uNode.order>nextNorthBorder)){addConflict(conflicts,u,v)}})}})}function visitLayer(north,south){var prevNorthPos=-1,nextNorthPos,southPos=0;_.each(south,function(v,southLookahead){if(g.node(v).dummy==="border"){var predecessors=g.predecessors(v);if(predecessors.length){nextNorthPos=g.node(predecessors[0]).order;scan(south,southPos,southLookahead,prevNorthPos,nextNorthPos);southPos=southLookahead;prevNorthPos=nextNorthPos}}scan(south,southPos,south.length,nextNorthPos,north.length)});return south}_.reduce(layering,visitLayer);return conflicts}function findOtherInnerSegmentNode(g,v){if(g.node(v).dummy){return _.find(g.predecessors(v),function(u){return g.node(u).dummy})}}function addConflict(conflicts,v,w){if(v>w){var tmp=v;v=w;w=tmp}var conflictsV=conflicts[v];if(!conflictsV){conflicts[v]=conflictsV={}}conflictsV[w]=true}function hasConflict(conflicts,v,w){if(v>w){var tmp=v;v=w;w=tmp}return _.has(conflicts[v],w)}function verticalAlignment(g,layering,conflicts,neighborFn){var root={},align={},pos={};_.each(layering,function(layer){_.each(layer,function(v,order){root[v]=v;align[v]=v;pos[v]=order})});_.each(layering,function(layer){var prevIdx=-1;_.each(layer,function(v){var ws=neighborFn(v);if(ws.length){ws=_.sortBy(ws,function(w){return pos[w]});var mp=(ws.length-1)/2;for(var i=Math.floor(mp),il=Math.ceil(mp);i<=il;++i){var w=ws[i];if(align[v]===v&&prevIdx<pos[w]&&!hasConflict(conflicts,v,w)){align[w]=v;align[v]=root[v]=root[w];prevIdx=pos[w]}}}})});return{root:root,align:align}}function horizontalCompaction(g,layering,root,align,reverseSep){var xs={},blockG=buildBlockGraph(g,layering,root,reverseSep);var visited={};function pass1(v){if(!_.has(visited,v)){visited[v]=true;xs[v]=_.reduce(blockG.inEdges(v),function(max,e){pass1(e.v);return Math.max(max,xs[e.v]+blockG.edge(e))},0)}}_.each(blockG.nodes(),pass1);function pass2(v){if(visited[v]!==2){visited[v]++;var min=_.reduce(blockG.outEdges(v),function(min,e){pass2(e.w);return Math.min(min,xs[e.w]-blockG.edge(e))},Number.POSITIVE_INFINITY);if(min!==Number.POSITIVE_INFINITY){xs[v]=Math.max(xs[v],min)}}}_.each(blockG.nodes(),pass2);_.each(align,function(v){xs[v]=xs[root[v]]});return xs}function buildBlockGraph(g,layering,root,reverseSep){var blockGraph=new Graph,graphLabel=g.graph(),sepFn=sep(graphLabel.nodesep,graphLabel.edgesep,reverseSep);_.each(layering,function(layer){var u;_.each(layer,function(v){var vRoot=root[v];blockGraph.setNode(vRoot);if(u){var uRoot=root[u],prevMax=blockGraph.edge(uRoot,vRoot);blockGraph.setEdge(uRoot,vRoot,Math.max(sepFn(g,v,u),prevMax||0))}u=v})});return blockGraph}function findSmallestWidthAlignment(g,xss){return _.min(xss,function(xs){var min=_.min(xs,function(x,v){return x-width(g,v)/2}),max=_.max(xs,function(x,v){return x+width(g,v)/2});return max-min})}function alignCoordinates(xss,alignTo){var alignToMin=_.min(alignTo),alignToMax=_.max(alignTo);_.each(["u","d"],function(vert){_.each(["l","r"],function(horiz){var alignment=vert+horiz,xs=xss[alignment],delta;if(xs===alignTo)return;delta=horiz==="l"?alignToMin-_.min(xs):alignToMax-_.max(xs);if(delta){xss[alignment]=_.mapValues(xs,function(x){return x+delta})}})})}function balance(xss,align){return _.mapValues(xss.ul,function(ignore,v){if(align){return xss[align.toLowerCase()][v]}else{var xs=_.sortBy(_.pluck(xss,v));return(xs[1]+xs[2])/2}})}function positionX(g){var layering=util.buildLayerMatrix(g),conflicts=_.merge(findType1Conflicts(g,layering),findType2Conflicts(g,layering));var xss={},adjustedLayering;_.each(["u","d"],function(vert){adjustedLayering=vert==="u"?layering:_.values(layering).reverse();_.each(["l","r"],function(horiz){if(horiz==="r"){adjustedLayering=_.map(adjustedLayering,function(inner){return _.values(inner).reverse()})}var neighborFn=_.bind(vert==="u"?g.predecessors:g.successors,g);var align=verticalAlignment(g,adjustedLayering,conflicts,neighborFn);var xs=horizontalCompaction(g,adjustedLayering,align.root,align.align,horiz==="r");if(horiz==="r"){xs=_.mapValues(xs,function(x){return-x})}xss[vert+horiz]=xs})});var smallestWidth=findSmallestWidthAlignment(g,xss);alignCoordinates(xss,smallestWidth);return balance(xss,g.graph().align)}function sep(nodeSep,edgeSep,reverseSep){return function(g,v,w){var vLabel=g.node(v),wLabel=g.node(w),sum=0,delta;sum+=vLabel.width/2;if(_.has(vLabel,"labelpos")){switch(vLabel.labelpos.toLowerCase()){case"l":delta=-vLabel.width/2;break;case"r":delta=vLabel.width/2;break}}if(delta){sum+=reverseSep?delta:-delta}delta=0;sum+=(vLabel.dummy?edgeSep:nodeSep)/2;sum+=(wLabel.dummy?edgeSep:nodeSep)/2;sum+=wLabel.width/2;if(_.has(wLabel,"labelpos")){switch(wLabel.labelpos.toLowerCase()){case"l":delta=wLabel.width/2;break;case"r":delta=-wLabel.width/2;break}}if(delta){sum+=reverseSep?delta:-delta}delta=0;return sum}}function width(g,v){return g.node(v).width}},{"../graphlib":33,"../lodash":36,"../util":55}],50:[function(require,module,exports){"use strict";var _=require("../lodash"),util=require("../util"),positionX=require("./bk").positionX;module.exports=position;function position(g){g=util.asNonCompoundGraph(g);positionY(g);_.each(positionX(g),function(x,v){g.node(v).x=x})}function positionY(g){var layering=util.buildLayerMatrix(g),rankSep=g.graph().ranksep,prevY=0;_.each(layering,function(layer){var maxHeight=_.max(_.map(layer,function(v){return g.node(v).height}));_.each(layer,function(v){g.node(v).y=prevY+maxHeight/2});prevY+=maxHeight+rankSep})}},{"../lodash":36,"../util":55,"./bk":49}],51:[function(require,module,exports){"use strict";var _=require("../lodash"),Graph=require("../graphlib").Graph,slack=require("./util").slack;module.exports=feasibleTree;function feasibleTree(g){var t=new Graph({directed:false});var start=g.nodes()[0],size=g.nodeCount();t.setNode(start,{});var edge,delta;while(tightTree(t,g)<size){edge=findMinSlackEdge(t,g);delta=t.hasNode(edge.v)?slack(g,edge):-slack(g,edge);shiftRanks(t,g,delta)}return t}function tightTree(t,g){function dfs(v){_.each(g.nodeEdges(v),function(e){var edgeV=e.v,w=v===edgeV?e.w:edgeV;if(!t.hasNode(w)&&!slack(g,e)){t.setNode(w,{});t.setEdge(v,w,{});dfs(w)}})}_.each(t.nodes(),dfs);return t.nodeCount()}function findMinSlackEdge(t,g){return _.min(g.edges(),function(e){if(t.hasNode(e.v)!==t.hasNode(e.w)){return slack(g,e)}})}function shiftRanks(t,g,delta){_.each(t.nodes(),function(v){g.node(v).rank+=delta})}},{"../graphlib":33,"../lodash":36,"./util":54}],52:[function(require,module,exports){"use strict";var rankUtil=require("./util"),longestPath=rankUtil.longestPath,feasibleTree=require("./feasible-tree"),networkSimplex=require("./network-simplex");module.exports=rank;function rank(g){switch(g.graph().ranker){case"network-simplex":networkSimplexRanker(g);break;case"tight-tree":tightTreeRanker(g);break;case"longest-path":longestPathRanker(g);break;default:networkSimplexRanker(g)}}var longestPathRanker=longestPath;function tightTreeRanker(g){longestPath(g);feasibleTree(g)}function networkSimplexRanker(g){networkSimplex(g)}},{"./feasible-tree":51,"./network-simplex":53,"./util":54}],53:[function(require,module,exports){"use strict";var _=require("../lodash"),feasibleTree=require("./feasible-tree"),slack=require("./util").slack,initRank=require("./util").longestPath,preorder=require("../graphlib").alg.preorder,postorder=require("../graphlib").alg.postorder,simplify=require("../util").simplify;module.exports=networkSimplex;networkSimplex.initLowLimValues=initLowLimValues;networkSimplex.initCutValues=initCutValues;networkSimplex.calcCutValue=calcCutValue;networkSimplex.leaveEdge=leaveEdge;networkSimplex.enterEdge=enterEdge;networkSimplex.exchangeEdges=exchangeEdges;function networkSimplex(g){g=simplify(g);initRank(g);var t=feasibleTree(g);initLowLimValues(t);initCutValues(t,g);var e,f;while(e=leaveEdge(t)){f=enterEdge(t,g,e);exchangeEdges(t,g,e,f)}}function initCutValues(t,g){var vs=postorder(t,t.nodes());vs=vs.slice(0,vs.length-1);_.each(vs,function(v){assignCutValue(t,g,v)})}function assignCutValue(t,g,child){var childLab=t.node(child),parent=childLab.parent;t.edge(child,parent).cutvalue=calcCutValue(t,g,child)}function calcCutValue(t,g,child){var childLab=t.node(child),parent=childLab.parent,childIsTail=true,graphEdge=g.edge(child,parent),cutValue=0;if(!graphEdge){childIsTail=false;graphEdge=g.edge(parent,child)}cutValue=graphEdge.weight;_.each(g.nodeEdges(child),function(e){var isOutEdge=e.v===child,other=isOutEdge?e.w:e.v;if(other!==parent){var pointsToHead=isOutEdge===childIsTail,otherWeight=g.edge(e).weight;cutValue+=pointsToHead?otherWeight:-otherWeight;if(isTreeEdge(t,child,other)){var otherCutValue=t.edge(child,other).cutvalue;cutValue+=pointsToHead?-otherCutValue:otherCutValue}}});return cutValue}function initLowLimValues(tree,root){if(arguments.length<2){root=tree.nodes()[0]}dfsAssignLowLim(tree,{},1,root)}function dfsAssignLowLim(tree,visited,nextLim,v,parent){var low=nextLim,label=tree.node(v);visited[v]=true;_.each(tree.neighbors(v),function(w){if(!_.has(visited,w)){nextLim=dfsAssignLowLim(tree,visited,nextLim,w,v)}});label.low=low;label.lim=nextLim++;if(parent){label.parent=parent}else{delete label.parent}return nextLim}function leaveEdge(tree){return _.find(tree.edges(),function(e){return tree.edge(e).cutvalue<0})}function enterEdge(t,g,edge){var v=edge.v,w=edge.w;if(!g.hasEdge(v,w)){v=edge.w;w=edge.v}var vLabel=t.node(v),wLabel=t.node(w),tailLabel=vLabel,flip=false;if(vLabel.lim>wLabel.lim){tailLabel=wLabel;flip=true}var candidates=_.filter(g.edges(),function(edge){return flip===isDescendant(t,t.node(edge.v),tailLabel)&&flip!==isDescendant(t,t.node(edge.w),tailLabel)});return _.min(candidates,function(edge){return slack(g,edge)})}function exchangeEdges(t,g,e,f){var v=e.v,w=e.w;t.removeEdge(v,w);t.setEdge(f.v,f.w,{});initLowLimValues(t);initCutValues(t,g);updateRanks(t,g)}function updateRanks(t,g){var root=_.find(t.nodes(),function(v){return!g.node(v).parent}),vs=preorder(t,root);vs=vs.slice(1);_.each(vs,function(v){var parent=t.node(v).parent,edge=g.edge(v,parent),flipped=false;if(!edge){edge=g.edge(parent,v);flipped=true}g.node(v).rank=g.node(parent).rank+(flipped?edge.minlen:-edge.minlen)})}function isTreeEdge(tree,u,v){return tree.hasEdge(u,v)}function isDescendant(tree,vLabel,rootLabel){return rootLabel.low<=vLabel.lim&&vLabel.lim<=rootLabel.lim}},{"../graphlib":33,"../lodash":36,"../util":55,"./feasible-tree":51,"./util":54}],54:[function(require,module,exports){"use strict";var _=require("../lodash");module.exports={longestPath:longestPath,slack:slack};function longestPath(g){var visited={};function dfs(v){var label=g.node(v);if(_.has(visited,v)){return label.rank}visited[v]=true;var rank=_.min(_.map(g.outEdges(v),function(e){return dfs(e.w)-g.edge(e).minlen}));if(rank===Number.POSITIVE_INFINITY){rank=0}return label.rank=rank}_.each(g.sources(),dfs)}function slack(g,e){return g.node(e.w).rank-g.node(e.v).rank-g.edge(e).minlen}},{"../lodash":36}],55:[function(require,module,exports){"use strict";var _=require("./lodash"),Graph=require("./graphlib").Graph;module.exports={addDummyNode:addDummyNode,simplify:simplify,asNonCompoundGraph:asNonCompoundGraph,successorWeights:successorWeights,predecessorWeights:predecessorWeights,intersectRect:intersectRect,buildLayerMatrix:buildLayerMatrix,normalizeRanks:normalizeRanks,removeEmptyRanks:removeEmptyRanks,addBorderNode:addBorderNode,maxRank:maxRank,partition:partition,time:time,notime:notime};function addDummyNode(g,type,attrs,name){var v;do{v=_.uniqueId(name)}while(g.hasNode(v));attrs.dummy=type;g.setNode(v,attrs);return v}function simplify(g){var simplified=(new Graph).setGraph(g.graph());_.each(g.nodes(),function(v){simplified.setNode(v,g.node(v))});_.each(g.edges(),function(e){var simpleLabel=simplified.edge(e.v,e.w)||{weight:0,minlen:1},label=g.edge(e);simplified.setEdge(e.v,e.w,{weight:simpleLabel.weight+label.weight,minlen:Math.max(simpleLabel.minlen,label.minlen)})});return simplified}function asNonCompoundGraph(g){var simplified=new Graph({multigraph:g.isMultigraph()}).setGraph(g.graph());_.each(g.nodes(),function(v){if(!g.children(v).length){simplified.setNode(v,g.node(v))}});_.each(g.edges(),function(e){simplified.setEdge(e,g.edge(e))});return simplified}function successorWeights(g){var weightMap=_.map(g.nodes(),function(v){var sucs={};_.each(g.outEdges(v),function(e){sucs[e.w]=(sucs[e.w]||0)+g.edge(e).weight});return sucs});return _.zipObject(g.nodes(),weightMap)}function predecessorWeights(g){var weightMap=_.map(g.nodes(),function(v){var preds={};_.each(g.inEdges(v),function(e){preds[e.v]=(preds[e.v]||0)+g.edge(e).weight});return preds});return _.zipObject(g.nodes(),weightMap)}function intersectRect(rect,point){var x=rect.x;var y=rect.y;var dx=point.x-x;var dy=point.y-y;var w=rect.width/2;var h=rect.height/2;if(!dx&&!dy){throw new Error("Not possible to find intersection inside of the rectangle")}var sx,sy;if(Math.abs(dy)*w>Math.abs(dx)*h){if(dy<0){h=-h}sx=h*dx/dy;sy=h}else{if(dx<0){w=-w}sx=w;sy=w*dy/dx}return{x:x+sx,y:y+sy}}function buildLayerMatrix(g){var layering=_.map(_.range(maxRank(g)+1),function(){return[]
+});_.each(g.nodes(),function(v){var node=g.node(v),rank=node.rank;if(!_.isUndefined(rank)){layering[rank][node.order]=v}});return layering}function normalizeRanks(g){var min=_.min(_.map(g.nodes(),function(v){return g.node(v).rank}));_.each(g.nodes(),function(v){var node=g.node(v);if(_.has(node,"rank")){node.rank-=min}})}function removeEmptyRanks(g){var offset=_.min(_.map(g.nodes(),function(v){return g.node(v).rank}));var layers=[];_.each(g.nodes(),function(v){var rank=g.node(v).rank-offset;if(!_.has(layers,rank)){layers[rank]=[]}layers[rank].push(v)});var delta=0,nodeRankFactor=g.graph().nodeRankFactor;_.each(layers,function(vs,i){if(_.isUndefined(vs)&&i%nodeRankFactor!==0){--delta}else if(delta){_.each(vs,function(v){g.node(v).rank+=delta})}})}function addBorderNode(g,prefix,rank,order){var node={width:0,height:0};if(arguments.length>=4){node.rank=rank;node.order=order}return addDummyNode(g,"border",node,prefix)}function maxRank(g){return _.max(_.map(g.nodes(),function(v){var rank=g.node(v).rank;if(!_.isUndefined(rank)){return rank}}))}function partition(collection,fn){var result={lhs:[],rhs:[]};_.each(collection,function(value){if(fn(value)){result.lhs.push(value)}else{result.rhs.push(value)}});return result}function time(name,fn){var start=_.now();try{return fn()}finally{console.log(name+" time: "+(_.now()-start)+"ms")}}function notime(name,fn){return fn()}},{"./graphlib":33,"./lodash":36}],56:[function(require,module,exports){module.exports="0.7.1"},{}],57:[function(require,module,exports){var lib=require("./lib");module.exports={Graph:lib.Graph,json:require("./lib/json"),alg:require("./lib/alg"),version:lib.version}},{"./lib":73,"./lib/alg":64,"./lib/json":74}],58:[function(require,module,exports){var _=require("../lodash");module.exports=components;function components(g){var visited={},cmpts=[],cmpt;function dfs(v){if(_.has(visited,v))return;visited[v]=true;cmpt.push(v);_.each(g.successors(v),dfs);_.each(g.predecessors(v),dfs)}_.each(g.nodes(),function(v){cmpt=[];dfs(v);if(cmpt.length){cmpts.push(cmpt)}});return cmpts}},{"../lodash":75}],59:[function(require,module,exports){var _=require("../lodash");module.exports=dfs;function dfs(g,vs,order){if(!_.isArray(vs)){vs=[vs]}var acc=[],visited={};_.each(vs,function(v){if(!g.hasNode(v)){throw new Error("Graph does not have node: "+v)}doDfs(g,v,order==="post",visited,acc)});return acc}function doDfs(g,v,postorder,visited,acc){if(!_.has(visited,v)){visited[v]=true;if(!postorder){acc.push(v)}_.each(g.neighbors(v),function(w){doDfs(g,w,postorder,visited,acc)});if(postorder){acc.push(v)}}}},{"../lodash":75}],60:[function(require,module,exports){var dijkstra=require("./dijkstra"),_=require("../lodash");module.exports=dijkstraAll;function dijkstraAll(g,weightFunc,edgeFunc){return _.transform(g.nodes(),function(acc,v){acc[v]=dijkstra(g,v,weightFunc,edgeFunc)},{})}},{"../lodash":75,"./dijkstra":61}],61:[function(require,module,exports){var _=require("../lodash"),PriorityQueue=require("../data/priority-queue");module.exports=dijkstra;var DEFAULT_WEIGHT_FUNC=_.constant(1);function dijkstra(g,source,weightFn,edgeFn){return runDijkstra(g,String(source),weightFn||DEFAULT_WEIGHT_FUNC,edgeFn||function(v){return g.outEdges(v)})}function runDijkstra(g,source,weightFn,edgeFn){var results={},pq=new PriorityQueue,v,vEntry;var updateNeighbors=function(edge){var w=edge.v!==v?edge.v:edge.w,wEntry=results[w],weight=weightFn(edge),distance=vEntry.distance+weight;if(weight<0){throw new Error("dijkstra does not allow negative edge weights. "+"Bad edge: "+edge+" Weight: "+weight)}if(distance<wEntry.distance){wEntry.distance=distance;wEntry.predecessor=v;pq.decrease(w,distance)}};g.nodes().forEach(function(v){var distance=v===source?0:Number.POSITIVE_INFINITY;results[v]={distance:distance};pq.add(v,distance)});while(pq.size()>0){v=pq.removeMin();vEntry=results[v];if(vEntry.distance===Number.POSITIVE_INFINITY){break}edgeFn(v).forEach(updateNeighbors)}return results}},{"../data/priority-queue":71,"../lodash":75}],62:[function(require,module,exports){var _=require("../lodash"),tarjan=require("./tarjan");module.exports=findCycles;function findCycles(g){return _.filter(tarjan(g),function(cmpt){return cmpt.length>1})}},{"../lodash":75,"./tarjan":69}],63:[function(require,module,exports){var _=require("../lodash");module.exports=floydWarshall;var DEFAULT_WEIGHT_FUNC=_.constant(1);function floydWarshall(g,weightFn,edgeFn){return runFloydWarshall(g,weightFn||DEFAULT_WEIGHT_FUNC,edgeFn||function(v){return g.outEdges(v)})}function runFloydWarshall(g,weightFn,edgeFn){var results={},nodes=g.nodes();nodes.forEach(function(v){results[v]={};results[v][v]={distance:0};nodes.forEach(function(w){if(v!==w){results[v][w]={distance:Number.POSITIVE_INFINITY}}});edgeFn(v).forEach(function(edge){var w=edge.v===v?edge.w:edge.v,d=weightFn(edge);results[v][w]={distance:d,predecessor:v}})});nodes.forEach(function(k){var rowK=results[k];nodes.forEach(function(i){var rowI=results[i];nodes.forEach(function(j){var ik=rowI[k];var kj=rowK[j];var ij=rowI[j];var altDistance=ik.distance+kj.distance;if(altDistance<ij.distance){ij.distance=altDistance;ij.predecessor=kj.predecessor}})})});return results}},{"../lodash":75}],64:[function(require,module,exports){module.exports={components:require("./components"),dijkstra:require("./dijkstra"),dijkstraAll:require("./dijkstra-all"),findCycles:require("./find-cycles"),floydWarshall:require("./floyd-warshall"),isAcyclic:require("./is-acyclic"),postorder:require("./postorder"),preorder:require("./preorder"),prim:require("./prim"),tarjan:require("./tarjan"),topsort:require("./topsort")}},{"./components":58,"./dijkstra":61,"./dijkstra-all":60,"./find-cycles":62,"./floyd-warshall":63,"./is-acyclic":65,"./postorder":66,"./preorder":67,"./prim":68,"./tarjan":69,"./topsort":70}],65:[function(require,module,exports){var topsort=require("./topsort");module.exports=isAcyclic;function isAcyclic(g){try{topsort(g)}catch(e){if(e instanceof topsort.CycleException){return false}throw e}return true}},{"./topsort":70}],66:[function(require,module,exports){var dfs=require("./dfs");module.exports=postorder;function postorder(g,vs){return dfs(g,vs,"post")}},{"./dfs":59}],67:[function(require,module,exports){var dfs=require("./dfs");module.exports=preorder;function preorder(g,vs){return dfs(g,vs,"pre")}},{"./dfs":59}],68:[function(require,module,exports){var _=require("../lodash"),Graph=require("../graph"),PriorityQueue=require("../data/priority-queue");module.exports=prim;function prim(g,weightFunc){var result=new Graph,parents={},pq=new PriorityQueue,v;function updateNeighbors(edge){var w=edge.v===v?edge.w:edge.v,pri=pq.priority(w);if(pri!==undefined){var edgeWeight=weightFunc(edge);if(edgeWeight<pri){parents[w]=v;pq.decrease(w,edgeWeight)}}}if(g.nodeCount()===0){return result}_.each(g.nodes(),function(v){pq.add(v,Number.POSITIVE_INFINITY);result.setNode(v)});pq.decrease(g.nodes()[0],0);var init=false;while(pq.size()>0){v=pq.removeMin();if(_.has(parents,v)){result.setEdge(v,parents[v])}else if(init){throw new Error("Input graph is not connected: "+g)}else{init=true}g.nodeEdges(v).forEach(updateNeighbors)}return result}},{"../data/priority-queue":71,"../graph":72,"../lodash":75}],69:[function(require,module,exports){var _=require("../lodash");module.exports=tarjan;function tarjan(g){var index=0,stack=[],visited={},results=[];function dfs(v){var entry=visited[v]={onStack:true,lowlink:index,index:index++};stack.push(v);g.successors(v).forEach(function(w){if(!_.has(visited,w)){dfs(w);entry.lowlink=Math.min(entry.lowlink,visited[w].lowlink)}else if(visited[w].onStack){entry.lowlink=Math.min(entry.lowlink,visited[w].index)}});if(entry.lowlink===entry.index){var cmpt=[],w;do{w=stack.pop();visited[w].onStack=false;cmpt.push(w)}while(v!==w);results.push(cmpt)}}g.nodes().forEach(function(v){if(!_.has(visited,v)){dfs(v)}});return results}},{"../lodash":75}],70:[function(require,module,exports){var _=require("../lodash");module.exports=topsort;topsort.CycleException=CycleException;function topsort(g){var visited={},stack={},results=[];function visit(node){if(_.has(stack,node)){throw new CycleException}if(!_.has(visited,node)){stack[node]=true;visited[node]=true;_.each(g.predecessors(node),visit);delete stack[node];results.push(node)}}_.each(g.sinks(),visit);if(_.size(visited)!==g.nodeCount()){throw new CycleException}return results}function CycleException(){}},{"../lodash":75}],71:[function(require,module,exports){var _=require("../lodash");module.exports=PriorityQueue;function PriorityQueue(){this._arr=[];this._keyIndices={}}PriorityQueue.prototype.size=function(){return this._arr.length};PriorityQueue.prototype.keys=function(){return this._arr.map(function(x){return x.key})};PriorityQueue.prototype.has=function(key){return _.has(this._keyIndices,key)};PriorityQueue.prototype.priority=function(key){var index=this._keyIndices[key];if(index!==undefined){return this._arr[index].priority}};PriorityQueue.prototype.min=function(){if(this.size()===0){throw new Error("Queue underflow")}return this._arr[0].key};PriorityQueue.prototype.add=function(key,priority){var 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"+"Key: "+key+" Old: "+this._arr[index].priority+" New: "+priority)}this._arr[index].priority=priority;this._decrease(index)};PriorityQueue.prototype._heapify=function(i){var arr=this._arr;var l=2*i,r=l+1,largest=i;if(l<arr.length){largest=arr[l].priority<arr[largest].priority?l:largest;if(r<arr.length){largest=arr[r].priority<arr[largest].priority?r:largest}if(largest!==i){this._swap(i,largest);this._heapify(largest)}}};PriorityQueue.prototype._decrease=function(index){var arr=this._arr;var priority=arr[index].priority;var parent;while(index!==0){parent=index>>1;if(arr[parent].priority<priority){break}this._swap(index,parent);index=parent}};PriorityQueue.prototype._swap=function(i,j){var arr=this._arr;var keyIndices=this._keyIndices;var origArrI=arr[i];var origArrJ=arr[j];arr[i]=origArrJ;arr[j]=origArrI;keyIndices[origArrJ.key]=i;keyIndices[origArrI.key]=j}},{"../lodash":75}],72:[function(require,module,exports){"use strict";var _=require("./lodash");module.exports=Graph;var DEFAULT_EDGE_NAME="\x00",GRAPH_NODE="\x00",EDGE_KEY_DELIM="";function Graph(opts){this._isDirected=_.has(opts,"directed")?opts.directed:true;this._isMultigraph=_.has(opts,"multigraph")?opts.multigraph:false;this._isCompound=_.has(opts,"compound")?opts.compound:false;this._label=undefined;this._defaultNodeLabelFn=_.constant(undefined);this._defaultEdgeLabelFn=_.constant(undefined);this._nodes={};if(this._isCompound){this._parent={};this._children={};this._children[GRAPH_NODE]={}}this._in={};this._preds={};this._out={};this._sucs={};this._edgeObjs={};this._edgeLabels={}}Graph.prototype._nodeCount=0;Graph.prototype._edgeCount=0;Graph.prototype.isDirected=function(){return this._isDirected};Graph.prototype.isMultigraph=function(){return this._isMultigraph};Graph.prototype.isCompound=function(){return this._isCompound};Graph.prototype.setGraph=function(label){this._label=label;return this};Graph.prototype.graph=function(){return this._label};Graph.prototype.setDefaultNodeLabel=function(newDefault){if(!_.isFunction(newDefault)){newDefault=_.constant(newDefault)}this._defaultNodeLabelFn=newDefault;return this};Graph.prototype.nodeCount=function(){return this._nodeCount};Graph.prototype.nodes=function(){return _.keys(this._nodes)};Graph.prototype.sources=function(){return _.filter(this.nodes(),function(v){return _.isEmpty(this._in[v])},this)};Graph.prototype.sinks=function(){return _.filter(this.nodes(),function(v){return _.isEmpty(this._out[v])},this)};Graph.prototype.setNodes=function(vs,value){var args=arguments;_.each(vs,function(v){if(args.length>1){this.setNode(v,value)}else{this.setNode(v)}},this);return this};Graph.prototype.setNode=function(v,value){if(_.has(this._nodes,v)){if(arguments.length>1){this._nodes[v]=value}return this}this._nodes[v]=arguments.length>1?value:this._defaultNodeLabelFn(v);if(this._isCompound){this._parent[v]=GRAPH_NODE;this._children[v]={};this._children[GRAPH_NODE][v]=true}this._in[v]={};this._preds[v]={};this._out[v]={};this._sucs[v]={};++this._nodeCount;return this};Graph.prototype.node=function(v){return this._nodes[v]};Graph.prototype.hasNode=function(v){return _.has(this._nodes,v)};Graph.prototype.removeNode=function(v){var self=this;if(_.has(this._nodes,v)){var removeEdge=function(e){self.removeEdge(self._edgeObjs[e])};delete this._nodes[v];if(this._isCompound){this._removeFromParentsChildList(v);delete this._parent[v];_.each(this.children(v),function(child){this.setParent(child)},this);delete this._children[v]}_.each(_.keys(this._in[v]),removeEdge);delete this._in[v];delete this._preds[v];_.each(_.keys(this._out[v]),removeEdge);delete this._out[v];delete this._sucs[v];--this._nodeCount}return this};Graph.prototype.setParent=function(v,parent){if(!this._isCompound){throw new Error("Cannot set parent in a non-compound graph")}if(_.isUndefined(parent)){parent=GRAPH_NODE}else{for(var ancestor=parent;!_.isUndefined(ancestor);ancestor=this.parent(ancestor)){if(ancestor===v){throw new Error("Setting "+parent+" as parent of "+v+" would create create a cycle")}}this.setNode(parent)}this.setNode(v);this._removeFromParentsChildList(v);this._parent[v]=parent;this._children[parent][v]=true;return this};Graph.prototype._removeFromParentsChildList=function(v){delete this._children[this._parent[v]][v]};Graph.prototype.parent=function(v){if(this._isCompound){var parent=this._parent[v];if(parent!==GRAPH_NODE){return parent}}};Graph.prototype.children=function(v){if(_.isUndefined(v)){v=GRAPH_NODE}if(this._isCompound){var children=this._children[v];if(children){return _.keys(children)}}else if(v===GRAPH_NODE){return this.nodes()}else if(this.hasNode(v)){return[]}};Graph.prototype.predecessors=function(v){var predsV=this._preds[v];if(predsV){return _.keys(predsV)}};Graph.prototype.successors=function(v){var sucsV=this._sucs[v];if(sucsV){return _.keys(sucsV)}};Graph.prototype.neighbors=function(v){var preds=this.predecessors(v);if(preds){return _.union(preds,this.successors(v))}};Graph.prototype.setDefaultEdgeLabel=function(newDefault){if(!_.isFunction(newDefault)){newDefault=_.constant(newDefault)}this._defaultEdgeLabelFn=newDefault;return this};Graph.prototype.edgeCount=function(){return this._edgeCount};Graph.prototype.edges=function(){return _.values(this._edgeObjs)};Graph.prototype.setPath=function(vs,value){var self=this,args=arguments;_.reduce(vs,function(v,w){if(args.length>1){self.setEdge(v,w,value)}else{self.setEdge(v,w)}return w});return this};Graph.prototype.setEdge=function(){var v,w,name,value,valueSpecified=false;if(_.isPlainObject(arguments[0])){v=arguments[0].v;w=arguments[0].w;name=arguments[0].name;if(arguments.length===2){value=arguments[1];valueSpecified=true}}else{v=arguments[0];w=arguments[1];name=arguments[3];if(arguments.length>2){value=arguments[2];valueSpecified=true}}v=""+v;w=""+w;if(!_.isUndefined(name)){name=""+name}var e=edgeArgsToId(this._isDirected,v,w,name);if(_.has(this._edgeLabels,e)){if(valueSpecified){this._edgeLabels[e]=value}return this}if(!_.isUndefined(name)&&!this._isMultigraph){throw new Error("Cannot set a named edge when isMultigraph = false")}this.setNode(v);this.setNode(w);this._edgeLabels[e]=valueSpecified?value:this._defaultEdgeLabelFn(v,w,name);var edgeObj=edgeArgsToObj(this._isDirected,v,w,name);v=edgeObj.v;w=edgeObj.w;Object.freeze(edgeObj);this._edgeObjs[e]=edgeObj;incrementOrInitEntry(this._preds[w],v);incrementOrInitEntry(this._sucs[v],w);this._in[w][e]=edgeObj;this._out[v][e]=edgeObj;this._edgeCount++;return 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diff --git a/_freeze/site_libs/highlight-11.10.0/LICENSE b/_freeze/site_libs/highlight-11.10.0/LICENSE
@@ -0,0 +1,24 @@
+Copyright (c) 2006, Ivan Sagalaev
+All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ * Neither the name of highlight.js nor the names of its contributors
+ may be used to endorse or promote products derived from this software
+ without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/_freeze/site_libs/highlight-11.10.0/highlight.min.js b/_freeze/site_libs/highlight-11.10.0/highlight.min.js
@@ -0,0 +1,334 @@
+/*!
+ Highlight.js v11.10.0 (git: 366a8bd012)
+ (c) 2006-2024 Josh Goebel <hello@joshgoebel.com> and other contributors
+ License: BSD-3-Clause
+ */
+var hljs=function(){"use strict";function e(t){
+return t instanceof Map?t.clear=t.delete=t.set=()=>{
+throw Error("map is read-only")}:t instanceof Set&&(t.add=t.clear=t.delete=()=>{
+throw Error("set is read-only")
+}),Object.freeze(t),Object.getOwnPropertyNames(t).forEach((n=>{
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+})),t}class t{constructor(e){
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+ignoreMatch(){this.isMatchIgnored=!0}}function n(e){
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+;return t.forEach((e=>{for(const t in e)n[t]=e[t]})),n}const s=e=>!!e.scope
+;class o{constructor(e,t){
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diff --git a/_freeze/site_libs/highlight-11.10.0/textmate.css b/_freeze/site_libs/highlight-11.10.0/textmate.css
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+.profvis-code span.hljs-operator,
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+ color: rgb(104, 118, 135)
+}
+
+.profvis-code span.hljs-literal {
+ color: rgb(88, 72, 246)
+}
+
+.profvis-code span.hljs-number {
+ color: rgb(0, 0, 205);
+}
+
+.profvis-code span.hljs-comment {
+ color: rgb(76, 136, 107);
+}
+
+.profvis-code span.hljs-keyword {
+ color: rgb(0, 0, 255);
+}
+
+.profvis-code span.hljs-identifier {
+ color: rgb(0, 0, 0);
+}
+
+.profvis-code span.hljs-string {
+ color: rgb(3, 106, 7);
+}
diff --git a/_freeze/site_libs/htmltools-fill-0.5.8.1/fill.css b/_freeze/site_libs/htmltools-fill-0.5.8.1/fill.css
@@ -0,0 +1,21 @@
+@layer htmltools {
+ .html-fill-container {
+ display: flex;
+ flex-direction: column;
+ /* Prevent the container from expanding vertically or horizontally beyond its
+ parent's constraints. */
+ min-height: 0;
+ min-width: 0;
+ }
+ .html-fill-container > .html-fill-item {
+ /* Fill items can grow and shrink freely within
+ available vertical space in fillable container */
+ flex: 1 1 auto;
+ min-height: 0;
+ min-width: 0;
+ }
+ .html-fill-container > :not(.html-fill-item) {
+ /* Prevent shrinking or growing of non-fill items */
+ flex: 0 0 auto;
+ }
+}
diff --git a/_freeze/site_libs/htmlwidgets-1.6.4/htmlwidgets.js b/_freeze/site_libs/htmlwidgets-1.6.4/htmlwidgets.js
@@ -0,0 +1,901 @@
+(function() {
+ // If window.HTMLWidgets is already defined, then use it; otherwise create a
+ // new object. This allows preceding code to set options that affect the
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+ window.HTMLWidgets = window.HTMLWidgets || {};
+
+ // See if we're running in a viewer pane. If not, we're in a web browser.
+ var viewerMode = window.HTMLWidgets.viewerMode =
+ /\bviewer_pane=1\b/.test(window.location);
+
+ // See if we're running in Shiny mode. If not, it's a static document.
+ // Note that static widgets can appear in both Shiny and static modes, but
+ // obviously, Shiny widgets can only appear in Shiny apps/documents.
+ var shinyMode = window.HTMLWidgets.shinyMode =
+ typeof(window.Shiny) !== "undefined" && !!window.Shiny.outputBindings;
+
+ // We can't count on jQuery being available, so we implement our own
+ // version if necessary.
+ function querySelectorAll(scope, selector) {
+ if (typeof(jQuery) !== "undefined" && scope instanceof jQuery) {
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+ }
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+ }
+ }
+
+ function asArray(value) {
+ if (value === null)
+ return [];
+ if ($.isArray(value))
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+ return [value];
+ }
+
+ // Implement jQuery's extend
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+ if (arguments.length == 1) {
+ return target;
+ }
+ for (var i = 1; i < arguments.length; i++) {
+ var source = arguments[i];
+ for (var prop in source) {
+ if (source.hasOwnProperty(prop)) {
+ target[prop] = source[prop];
+ }
+ }
+ }
+ return target;
+ }
+
+ // IE8 doesn't support Array.forEach.
+ function forEach(values, callback, thisArg) {
+ if (values.forEach) {
+ values.forEach(callback, thisArg);
+ } else {
+ for (var i = 0; i < values.length; i++) {
+ callback.call(thisArg, values[i], i, values);
+ }
+ }
+ }
+
+ // Replaces the specified method with the return value of funcSource.
+ //
+ // Note that funcSource should not BE the new method, it should be a function
+ // that RETURNS the new method. funcSource receives a single argument that is
+ // the overridden method, it can be called from the new method. The overridden
+ // method can be called like a regular function, it has the target permanently
+ // bound to it so "this" will work correctly.
+ function overrideMethod(target, methodName, funcSource) {
+ var superFunc = target[methodName] || function() {};
+ var superFuncBound = function() {
+ return superFunc.apply(target, arguments);
+ };
+ target[methodName] = funcSource(superFuncBound);
+ }
+
+ // Add a method to delegator that, when invoked, calls
+ // delegatee.methodName. If there is no such method on
+ // the delegatee, but there was one on delegator before
+ // delegateMethod was called, then the original version
+ // is invoked instead.
+ // For example:
+ //
+ // var a = {
+ // method1: function() { console.log('a1'); }
+ // method2: function() { console.log('a2'); }
+ // };
+ // var b = {
+ // method1: function() { console.log('b1'); }
+ // };
+ // delegateMethod(a, b, "method1");
+ // delegateMethod(a, b, "method2");
+ // a.method1();
+ // a.method2();
+ //
+ // The output would be "b1", "a2".
+ function delegateMethod(delegator, delegatee, methodName) {
+ var inherited = delegator[methodName];
+ delegator[methodName] = function() {
+ var target = delegatee;
+ var method = delegatee[methodName];
+
+ // The method doesn't exist on the delegatee. Instead,
+ // call the method on the delegator, if it exists.
+ if (!method) {
+ target = delegator;
+ method = inherited;
+ }
+
+ if (method) {
+ return method.apply(target, arguments);
+ }
+ };
+ }
+
+ // Implement a vague facsimilie of jQuery's data method
+ function elementData(el, name, value) {
+ if (arguments.length == 2) {
+ return el["htmlwidget_data_" + name];
+ } else if (arguments.length == 3) {
+ el["htmlwidget_data_" + name] = value;
+ return el;
+ } else {
+ throw new Error("Wrong number of arguments for elementData: " +
+ arguments.length);
+ }
+ }
+
+ // http://stackoverflow.com/questions/3446170/escape-string-for-use-in-javascript-regex
+ function escapeRegExp(str) {
+ return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
+ }
+
+ function hasClass(el, className) {
+ var re = new RegExp("\\b" + escapeRegExp(className) + "\\b");
+ return re.test(el.className);
+ }
+
+ // elements - array (or array-like object) of HTML elements
+ // className - class name to test for
+ // include - if true, only return elements with given className;
+ // if false, only return elements *without* given className
+ function filterByClass(elements, className, include) {
+ var results = [];
+ for (var i = 0; i < elements.length; i++) {
+ if (hasClass(elements[i], className) == include)
+ results.push(elements[i]);
+ }
+ return results;
+ }
+
+ function on(obj, eventName, func) {
+ if (obj.addEventListener) {
+ obj.addEventListener(eventName, func, false);
+ } else if (obj.attachEvent) {
+ obj.attachEvent(eventName, func);
+ }
+ }
+
+ function off(obj, eventName, func) {
+ if (obj.removeEventListener)
+ obj.removeEventListener(eventName, func, false);
+ else if (obj.detachEvent) {
+ obj.detachEvent(eventName, func);
+ }
+ }
+
+ // Translate array of values to top/right/bottom/left, as usual with
+ // the "padding" CSS property
+ // https://developer.mozilla.org/en-US/docs/Web/CSS/padding
+ function unpackPadding(value) {
+ if (typeof(value) === "number")
+ value = [value];
+ if (value.length === 1) {
+ return {top: value[0], right: value[0], bottom: value[0], left: value[0]};
+ }
+ if (value.length === 2) {
+ return {top: value[0], right: value[1], bottom: value[0], left: value[1]};
+ }
+ if (value.length === 3) {
+ return {top: value[0], right: value[1], bottom: value[2], left: value[1]};
+ }
+ if (value.length === 4) {
+ return {top: value[0], right: value[1], bottom: value[2], left: value[3]};
+ }
+ }
+
+ // Convert an unpacked padding object to a CSS value
+ function paddingToCss(paddingObj) {
+ return paddingObj.top + "px " + paddingObj.right + "px " + paddingObj.bottom + "px " + paddingObj.left + "px";
+ }
+
+ // Makes a number suitable for CSS
+ function px(x) {
+ if (typeof(x) === "number")
+ return x + "px";
+ else
+ return x;
+ }
+
+ // Retrieves runtime widget sizing information for an element.
+ // The return value is either null, or an object with fill, padding,
+ // defaultWidth, defaultHeight fields.
+ function sizingPolicy(el) {
+ var sizingEl = document.querySelector("script[data-for='" + el.id + "'][type='application/htmlwidget-sizing']");
+ if (!sizingEl)
+ return null;
+ var sp = JSON.parse(sizingEl.textContent || sizingEl.text || "{}");
+ if (viewerMode) {
+ return sp.viewer;
+ } else {
+ return sp.browser;
+ }
+ }
+
+ // @param tasks Array of strings (or falsy value, in which case no-op).
+ // Each element must be a valid JavaScript expression that yields a
+ // function. Or, can be an array of objects with "code" and "data"
+ // properties; in this case, the "code" property should be a string
+ // of JS that's an expr that yields a function, and "data" should be
+ // an object that will be added as an additional argument when that
+ // function is called.
+ // @param target The object that will be "this" for each function
+ // execution.
+ // @param args Array of arguments to be passed to the functions. (The
+ // same arguments will be passed to all functions.)
+ function evalAndRun(tasks, target, args) {
+ if (tasks) {
+ forEach(tasks, function(task) {
+ var theseArgs = args;
+ if (typeof(task) === "object") {
+ theseArgs = theseArgs.concat([task.data]);
+ task = task.code;
+ }
+ var taskFunc = tryEval(task);
+ if (typeof(taskFunc) !== "function") {
+ throw new Error("Task must be a function! Source:\n" + task);
+ }
+ taskFunc.apply(target, theseArgs);
+ });
+ }
+ }
+
+ // Attempt eval() both with and without enclosing in parentheses.
+ // Note that enclosing coerces a function declaration into
+ // an expression that eval() can parse
+ // (otherwise, a SyntaxError is thrown)
+ function tryEval(code) {
+ var result = null;
+ try {
+ result = eval("(" + code + ")");
+ } catch(error) {
+ if (!(error instanceof SyntaxError)) {
+ throw error;
+ }
+ try {
+ result = eval(code);
+ } catch(e) {
+ if (e instanceof SyntaxError) {
+ throw error;
+ } else {
+ throw e;
+ }
+ }
+ }
+ return result;
+ }
+
+ function initSizing(el) {
+ var sizing = sizingPolicy(el);
+ if (!sizing)
+ return;
+
+ var cel = document.getElementById("htmlwidget_container");
+ if (!cel)
+ return;
+
+ if (typeof(sizing.padding) !== "undefined") {
+ document.body.style.margin = "0";
+ document.body.style.padding = paddingToCss(unpackPadding(sizing.padding));
+ }
+
+ if (sizing.fill) {
+ document.body.style.overflow = "hidden";
+ document.body.style.width = "100%";
+ document.body.style.height = "100%";
+ document.documentElement.style.width = "100%";
+ document.documentElement.style.height = "100%";
+ cel.style.position = "absolute";
+ var pad = unpackPadding(sizing.padding);
+ cel.style.top = pad.top + "px";
+ cel.style.right = pad.right + "px";
+ cel.style.bottom = pad.bottom + "px";
+ cel.style.left = pad.left + "px";
+ el.style.width = "100%";
+ el.style.height = "100%";
+
+ return {
+ getWidth: function() { return cel.getBoundingClientRect().width; },
+ getHeight: function() { return cel.getBoundingClientRect().height; }
+ };
+
+ } else {
+ el.style.width = px(sizing.width);
+ el.style.height = px(sizing.height);
+
+ return {
+ getWidth: function() { return cel.getBoundingClientRect().width; },
+ getHeight: function() { return cel.getBoundingClientRect().height; }
+ };
+ }
+ }
+
+ // Default implementations for methods
+ var defaults = {
+ find: function(scope) {
+ return querySelectorAll(scope, "." + this.name);
+ },
+ renderError: function(el, err) {
+ var $el = $(el);
+
+ this.clearError(el);
+
+ // Add all these error classes, as Shiny does
+ var errClass = "shiny-output-error";
+ if (err.type !== null) {
+ // use the classes of the error condition as CSS class names
+ errClass = errClass + " " + $.map(asArray(err.type), function(type) {
+ return errClass + "-" + type;
+ }).join(" ");
+ }
+ errClass = errClass + " htmlwidgets-error";
+
+ // Is el inline or block? If inline or inline-block, just display:none it
+ // and add an inline error.
+ var display = $el.css("display");
+ $el.data("restore-display-mode", display);
+
+ if (display === "inline" || display === "inline-block") {
+ $el.hide();
+ if (err.message !== "") {
+ var errorSpan = $("<span>").addClass(errClass);
+ errorSpan.text(err.message);
+ $el.after(errorSpan);
+ }
+ } else if (display === "block") {
+ // If block, add an error just after the el, set visibility:none on the
+ // el, and position the error to be on top of the el.
+ // Mark it with a unique ID and CSS class so we can remove it later.
+ $el.css("visibility", "hidden");
+ if (err.message !== "") {
+ var errorDiv = $("<div>").addClass(errClass).css("position", "absolute")
+ .css("top", el.offsetTop)
+ .css("left", el.offsetLeft)
+ // setting width can push out the page size, forcing otherwise
+ // unnecessary scrollbars to appear and making it impossible for
+ // the element to shrink; so use max-width instead
+ .css("maxWidth", el.offsetWidth)
+ .css("height", el.offsetHeight);
+ errorDiv.text(err.message);
+ $el.after(errorDiv);
+
+ // Really dumb way to keep the size/position of the error in sync with
+ // the parent element as the window is resized or whatever.
+ var intId = setInterval(function() {
+ if (!errorDiv[0].parentElement) {
+ clearInterval(intId);
+ return;
+ }
+ errorDiv
+ .css("top", el.offsetTop)
+ .css("left", el.offsetLeft)
+ .css("maxWidth", el.offsetWidth)
+ .css("height", el.offsetHeight);
+ }, 500);
+ }
+ }
+ },
+ clearError: function(el) {
+ var $el = $(el);
+ var display = $el.data("restore-display-mode");
+ $el.data("restore-display-mode", null);
+
+ if (display === "inline" || display === "inline-block") {
+ if (display)
+ $el.css("display", display);
+ $(el.nextSibling).filter(".htmlwidgets-error").remove();
+ } else if (display === "block"){
+ $el.css("visibility", "inherit");
+ $(el.nextSibling).filter(".htmlwidgets-error").remove();
+ }
+ },
+ sizing: {}
+ };
+
+ // Called by widget bindings to register a new type of widget. The definition
+ // object can contain the following properties:
+ // - name (required) - A string indicating the binding name, which will be
+ // used by default as the CSS classname to look for.
+ // - initialize (optional) - A function(el) that will be called once per
+ // widget element; if a value is returned, it will be passed as the third
+ // value to renderValue.
+ // - renderValue (required) - A function(el, data, initValue) that will be
+ // called with data. Static contexts will cause this to be called once per
+ // element; Shiny apps will cause this to be called multiple times per
+ // element, as the data changes.
+ window.HTMLWidgets.widget = function(definition) {
+ if (!definition.name) {
+ throw new Error("Widget must have a name");
+ }
+ if (!definition.type) {
+ throw new Error("Widget must have a type");
+ }
+ // Currently we only support output widgets
+ if (definition.type !== "output") {
+ throw new Error("Unrecognized widget type '" + definition.type + "'");
+ }
+ // TODO: Verify that .name is a valid CSS classname
+
+ // Support new-style instance-bound definitions. Old-style class-bound
+ // definitions have one widget "object" per widget per type/class of
+ // widget; the renderValue and resize methods on such widget objects
+ // take el and instance arguments, because the widget object can't
+ // store them. New-style instance-bound definitions have one widget
+ // object per widget instance; the definition that's passed in doesn't
+ // provide renderValue or resize methods at all, just the single method
+ // factory(el, width, height)
+ // which returns an object that has renderValue(x) and resize(w, h).
+ // This enables a far more natural programming style for the widget
+ // author, who can store per-instance state using either OO-style
+ // instance fields or functional-style closure variables (I guess this
+ // is in contrast to what can only be called C-style pseudo-OO which is
+ // what we required before).
+ if (definition.factory) {
+ definition = createLegacyDefinitionAdapter(definition);
+ }
+
+ if (!definition.renderValue) {
+ throw new Error("Widget must have a renderValue function");
+ }
+
+ // For static rendering (non-Shiny), use a simple widget registration
+ // scheme. We also use this scheme for Shiny apps/documents that also
+ // contain static widgets.
+ window.HTMLWidgets.widgets = window.HTMLWidgets.widgets || [];
+ // Merge defaults into the definition; don't mutate the original definition.
+ var staticBinding = extend({}, defaults, definition);
+ overrideMethod(staticBinding, "find", function(superfunc) {
+ return function(scope) {
+ var results = superfunc(scope);
+ // Filter out Shiny outputs, we only want the static kind
+ return filterByClass(results, "html-widget-output", false);
+ };
+ });
+ window.HTMLWidgets.widgets.push(staticBinding);
+
+ if (shinyMode) {
+ // Shiny is running. Register the definition with an output binding.
+ // The definition itself will not be the output binding, instead
+ // we will make an output binding object that delegates to the
+ // definition. This is because we foolishly used the same method
+ // name (renderValue) for htmlwidgets definition and Shiny bindings
+ // but they actually have quite different semantics (the Shiny
+ // bindings receive data that includes lots of metadata that it
+ // strips off before calling htmlwidgets renderValue). We can't
+ // just ignore the difference because in some widgets it's helpful
+ // to call this.renderValue() from inside of resize(), and if
+ // we're not delegating, then that call will go to the Shiny
+ // version instead of the htmlwidgets version.
+
+ // Merge defaults with definition, without mutating either.
+ var bindingDef = extend({}, defaults, definition);
+
+ // This object will be our actual Shiny binding.
+ var shinyBinding = new Shiny.OutputBinding();
+
+ // With a few exceptions, we'll want to simply use the bindingDef's
+ // version of methods if they are available, otherwise fall back to
+ // Shiny's defaults. NOTE: If Shiny's output bindings gain additional
+ // methods in the future, and we want them to be overrideable by
+ // HTMLWidget binding definitions, then we'll need to add them to this
+ // list.
+ delegateMethod(shinyBinding, bindingDef, "getId");
+ delegateMethod(shinyBinding, bindingDef, "onValueChange");
+ delegateMethod(shinyBinding, bindingDef, "onValueError");
+ delegateMethod(shinyBinding, bindingDef, "renderError");
+ delegateMethod(shinyBinding, bindingDef, "clearError");
+ delegateMethod(shinyBinding, bindingDef, "showProgress");
+
+ // The find, renderValue, and resize are handled differently, because we
+ // want to actually decorate the behavior of the bindingDef methods.
+
+ shinyBinding.find = function(scope) {
+ var results = bindingDef.find(scope);
+
+ // Only return elements that are Shiny outputs, not static ones
+ var dynamicResults = results.filter(".html-widget-output");
+
+ // It's possible that whatever caused Shiny to think there might be
+ // new dynamic outputs, also caused there to be new static outputs.
+ // Since there might be lots of different htmlwidgets bindings, we
+ // schedule execution for later--no need to staticRender multiple
+ // times.
+ if (results.length !== dynamicResults.length)
+ scheduleStaticRender();
+
+ return dynamicResults;
+ };
+
+ // Wrap renderValue to handle initialization, which unfortunately isn't
+ // supported natively by Shiny at the time of this writing.
+
+ shinyBinding.renderValue = function(el, data) {
+ Shiny.renderDependencies(data.deps);
+ // Resolve strings marked as javascript literals to objects
+ if (!(data.evals instanceof Array)) data.evals = [data.evals];
+ for (var i = 0; data.evals && i < data.evals.length; i++) {
+ window.HTMLWidgets.evaluateStringMember(data.x, data.evals[i]);
+ }
+ if (!bindingDef.renderOnNullValue) {
+ if (data.x === null) {
+ el.style.visibility = "hidden";
+ return;
+ } else {
+ el.style.visibility = "inherit";
+ }
+ }
+ if (!elementData(el, "initialized")) {
+ initSizing(el);
+
+ elementData(el, "initialized", true);
+ if (bindingDef.initialize) {
+ var rect = el.getBoundingClientRect();
+ var result = bindingDef.initialize(el, rect.width, rect.height);
+ elementData(el, "init_result", result);
+ }
+ }
+ bindingDef.renderValue(el, data.x, elementData(el, "init_result"));
+ evalAndRun(data.jsHooks.render, elementData(el, "init_result"), [el, data.x]);
+ };
+
+ // Only override resize if bindingDef implements it
+ if (bindingDef.resize) {
+ shinyBinding.resize = function(el, width, height) {
+ // Shiny can call resize before initialize/renderValue have been
+ // called, which doesn't make sense for widgets.
+ if (elementData(el, "initialized")) {
+ bindingDef.resize(el, width, height, elementData(el, "init_result"));
+ }
+ };
+ }
+
+ Shiny.outputBindings.register(shinyBinding, bindingDef.name);
+ }
+ };
+
+ var scheduleStaticRenderTimerId = null;
+ function scheduleStaticRender() {
+ if (!scheduleStaticRenderTimerId) {
+ scheduleStaticRenderTimerId = setTimeout(function() {
+ scheduleStaticRenderTimerId = null;
+ window.HTMLWidgets.staticRender();
+ }, 1);
+ }
+ }
+
+ // Render static widgets after the document finishes loading
+ // Statically render all elements that are of this widget's class
+ window.HTMLWidgets.staticRender = function() {
+ var bindings = window.HTMLWidgets.widgets || [];
+ forEach(bindings, function(binding) {
+ var matches = binding.find(document.documentElement);
+ forEach(matches, function(el) {
+ var sizeObj = initSizing(el, binding);
+
+ var getSize = function(el) {
+ if (sizeObj) {
+ return {w: sizeObj.getWidth(), h: sizeObj.getHeight()}
+ } else {
+ var rect = el.getBoundingClientRect();
+ return {w: rect.width, h: rect.height}
+ }
+ };
+
+ if (hasClass(el, "html-widget-static-bound"))
+ return;
+ el.className = el.className + " html-widget-static-bound";
+
+ var initResult;
+ if (binding.initialize) {
+ var size = getSize(el);
+ initResult = binding.initialize(el, size.w, size.h);
+ elementData(el, "init_result", initResult);
+ }
+
+ if (binding.resize) {
+ var lastSize = getSize(el);
+ var resizeHandler = function(e) {
+ var size = getSize(el);
+ if (size.w === 0 && size.h === 0)
+ return;
+ if (size.w === lastSize.w && size.h === lastSize.h)
+ return;
+ lastSize = size;
+ binding.resize(el, size.w, size.h, initResult);
+ };
+
+ on(window, "resize", resizeHandler);
+
+ // This is needed for cases where we're running in a Shiny
+ // app, but the widget itself is not a Shiny output, but
+ // rather a simple static widget. One example of this is
+ // an rmarkdown document that has runtime:shiny and widget
+ // that isn't in a render function. Shiny only knows to
+ // call resize handlers for Shiny outputs, not for static
+ // widgets, so we do it ourselves.
+ if (window.jQuery) {
+ window.jQuery(document).on(
+ "shown.htmlwidgets shown.bs.tab.htmlwidgets shown.bs.collapse.htmlwidgets",
+ resizeHandler
+ );
+ window.jQuery(document).on(
+ "hidden.htmlwidgets hidden.bs.tab.htmlwidgets hidden.bs.collapse.htmlwidgets",
+ resizeHandler
+ );
+ }
+
+ // This is needed for the specific case of ioslides, which
+ // flips slides between display:none and display:block.
+ // Ideally we would not have to have ioslide-specific code
+ // here, but rather have ioslides raise a generic event,
+ // but the rmarkdown package just went to CRAN so the
+ // window to getting that fixed may be long.
+ if (window.addEventListener) {
+ // It's OK to limit this to window.addEventListener
+ // browsers because ioslides itself only supports
+ // such browsers.
+ on(document, "slideenter", resizeHandler);
+ on(document, "slideleave", resizeHandler);
+ }
+ }
+
+ var scriptData = document.querySelector("script[data-for='" + el.id + "'][type='application/json']");
+ if (scriptData) {
+ var data = JSON.parse(scriptData.textContent || scriptData.text);
+ // Resolve strings marked as javascript literals to objects
+ if (!(data.evals instanceof Array)) data.evals = [data.evals];
+ for (var k = 0; data.evals && k < data.evals.length; k++) {
+ window.HTMLWidgets.evaluateStringMember(data.x, data.evals[k]);
+ }
+ binding.renderValue(el, data.x, initResult);
+ evalAndRun(data.jsHooks.render, initResult, [el, data.x]);
+ }
+ });
+ });
+
+ invokePostRenderHandlers();
+ }
+
+
+ function has_jQuery3() {
+ if (!window.jQuery) {
+ return false;
+ }
+ var $version = window.jQuery.fn.jquery;
+ var $major_version = parseInt($version.split(".")[0]);
+ return $major_version >= 3;
+ }
+
+ /*
+ / Shiny 1.4 bumped jQuery from 1.x to 3.x which means jQuery's
+ / on-ready handler (i.e., $(fn)) is now asyncronous (i.e., it now
+ / really means $(setTimeout(fn)).
+ / https://jquery.com/upgrade-guide/3.0/#breaking-change-document-ready-handlers-are-now-asynchronous
+ /
+ / Since Shiny uses $() to schedule initShiny, shiny>=1.4 calls initShiny
+ / one tick later than it did before, which means staticRender() is
+ / called renderValue() earlier than (advanced) widget authors might be expecting.
+ / https://github.com/rstudio/shiny/issues/2630
+ /
+ / For a concrete example, leaflet has some methods (e.g., updateBounds)
+ / which reference Shiny methods registered in initShiny (e.g., setInputValue).
+ / Since leaflet is privy to this life-cycle, it knows to use setTimeout() to
+ / delay execution of those methods (until Shiny methods are ready)
+ / https://github.com/rstudio/leaflet/blob/18ec981/javascript/src/index.js#L266-L268
+ /
+ / Ideally widget authors wouldn't need to use this setTimeout() hack that
+ / leaflet uses to call Shiny methods on a staticRender(). In the long run,
+ / the logic initShiny should be broken up so that method registration happens
+ / right away, but binding happens later.
+ */
+ function maybeStaticRenderLater() {
+ if (shinyMode && has_jQuery3()) {
+ window.jQuery(window.HTMLWidgets.staticRender);
+ } else {
+ window.HTMLWidgets.staticRender();
+ }
+ }
+
+ if (document.addEventListener) {
+ document.addEventListener("DOMContentLoaded", function() {
+ document.removeEventListener("DOMContentLoaded", arguments.callee, false);
+ maybeStaticRenderLater();
+ }, false);
+ } else if (document.attachEvent) {
+ document.attachEvent("onreadystatechange", function() {
+ if (document.readyState === "complete") {
+ document.detachEvent("onreadystatechange", arguments.callee);
+ maybeStaticRenderLater();
+ }
+ });
+ }
+
+
+ window.HTMLWidgets.getAttachmentUrl = function(depname, key) {
+ // If no key, default to the first item
+ if (typeof(key) === "undefined")
+ key = 1;
+
+ var link = document.getElementById(depname + "-" + key + "-attachment");
+ if (!link) {
+ throw new Error("Attachment " + depname + "/" + key + " not found in document");
+ }
+ return link.getAttribute("href");
+ };
+
+ window.HTMLWidgets.dataframeToD3 = function(df) {
+ var names = [];
+ var length;
+ for (var name in df) {
+ if (df.hasOwnProperty(name))
+ names.push(name);
+ if (typeof(df[name]) !== "object" || typeof(df[name].length) === "undefined") {
+ throw new Error("All fields must be arrays");
+ } else if (typeof(length) !== "undefined" && length !== df[name].length) {
+ throw new Error("All fields must be arrays of the same length");
+ }
+ length = df[name].length;
+ }
+ var results = [];
+ var item;
+ for (var row = 0; row < length; row++) {
+ item = {};
+ for (var col = 0; col < names.length; col++) {
+ item[names[col]] = df[names[col]][row];
+ }
+ results.push(item);
+ }
+ return results;
+ };
+
+ window.HTMLWidgets.transposeArray2D = function(array) {
+ if (array.length === 0) return array;
+ var newArray = array[0].map(function(col, i) {
+ return array.map(function(row) {
+ return row[i]
+ })
+ });
+ return newArray;
+ };
+ // Split value at splitChar, but allow splitChar to be escaped
+ // using escapeChar. Any other characters escaped by escapeChar
+ // will be included as usual (including escapeChar itself).
+ function splitWithEscape(value, splitChar, escapeChar) {
+ var results = [];
+ var escapeMode = false;
+ var currentResult = "";
+ for (var pos = 0; pos < value.length; pos++) {
+ if (!escapeMode) {
+ if (value[pos] === splitChar) {
+ results.push(currentResult);
+ currentResult = "";
+ } else if (value[pos] === escapeChar) {
+ escapeMode = true;
+ } else {
+ currentResult += value[pos];
+ }
+ } else {
+ currentResult += value[pos];
+ escapeMode = false;
+ }
+ }
+ if (currentResult !== "") {
+ results.push(currentResult);
+ }
+ return results;
+ }
+ // Function authored by Yihui/JJ Allaire
+ window.HTMLWidgets.evaluateStringMember = function(o, member) {
+ var parts = splitWithEscape(member, '.', '\\');
+ for (var i = 0, l = parts.length; i < l; i++) {
+ var part = parts[i];
+ // part may be a character or 'numeric' member name
+ if (o !== null && typeof o === "object" && part in o) {
+ if (i == (l - 1)) { // if we are at the end of the line then evalulate
+ if (typeof o[part] === "string")
+ o[part] = tryEval(o[part]);
+ } else { // otherwise continue to next embedded object
+ o = o[part];
+ }
+ }
+ }
+ };
+
+ // Retrieve the HTMLWidget instance (i.e. the return value of an
+ // HTMLWidget binding's initialize() or factory() function)
+ // associated with an element, or null if none.
+ window.HTMLWidgets.getInstance = function(el) {
+ return elementData(el, "init_result");
+ };
+
+ // Finds the first element in the scope that matches the selector,
+ // and returns the HTMLWidget instance (i.e. the return value of
+ // an HTMLWidget binding's initialize() or factory() function)
+ // associated with that element, if any. If no element matches the
+ // selector, or the first matching element has no HTMLWidget
+ // instance associated with it, then null is returned.
+ //
+ // The scope argument is optional, and defaults to window.document.
+ window.HTMLWidgets.find = function(scope, selector) {
+ if (arguments.length == 1) {
+ selector = scope;
+ scope = document;
+ }
+
+ var el = scope.querySelector(selector);
+ if (el === null) {
+ return null;
+ } else {
+ return window.HTMLWidgets.getInstance(el);
+ }
+ };
+
+ // Finds all elements in the scope that match the selector, and
+ // returns the HTMLWidget instances (i.e. the return values of
+ // an HTMLWidget binding's initialize() or factory() function)
+ // associated with the elements, in an array. If elements that
+ // match the selector don't have an associated HTMLWidget
+ // instance, the returned array will contain nulls.
+ //
+ // The scope argument is optional, and defaults to window.document.
+ window.HTMLWidgets.findAll = function(scope, selector) {
+ if (arguments.length == 1) {
+ selector = scope;
+ scope = document;
+ }
+
+ var nodes = scope.querySelectorAll(selector);
+ var results = [];
+ for (var i = 0; i < nodes.length; i++) {
+ results.push(window.HTMLWidgets.getInstance(nodes[i]));
+ }
+ return results;
+ };
+
+ var postRenderHandlers = [];
+ function invokePostRenderHandlers() {
+ while (postRenderHandlers.length) {
+ var handler = postRenderHandlers.shift();
+ if (handler) {
+ handler();
+ }
+ }
+ }
+
+ // Register the given callback function to be invoked after the
+ // next time static widgets are rendered.
+ window.HTMLWidgets.addPostRenderHandler = function(callback) {
+ postRenderHandlers.push(callback);
+ };
+
+ // Takes a new-style instance-bound definition, and returns an
+ // old-style class-bound definition. This saves us from having
+ // to rewrite all the logic in this file to accomodate both
+ // types of definitions.
+ function createLegacyDefinitionAdapter(defn) {
+ var result = {
+ name: defn.name,
+ type: defn.type,
+ initialize: function(el, width, height) {
+ return defn.factory(el, width, height);
+ },
+ renderValue: function(el, x, instance) {
+ return instance.renderValue(x);
+ },
+ resize: function(el, width, height, instance) {
+ return instance.resize(width, height);
+ }
+ };
+
+ if (defn.find)
+ result.find = defn.find;
+ if (defn.renderError)
+ result.renderError = defn.renderError;
+ if (defn.clearError)
+ result.clearError = defn.clearError;
+
+ return result;
+ }
+})();
diff --git a/_freeze/site_libs/jquery-3.7.1/AUTHORS.txt b/_freeze/site_libs/jquery-3.7.1/AUTHORS.txt
@@ -0,0 +1,371 @@
+John Resig <jeresig@gmail.com>
+Gilles van den Hoven <gilles0181@gmail.com>
+Michael Geary <mike@geary.com>
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diff --git a/_freeze/site_libs/mermaid-0.3.0/LICENSE b/_freeze/site_libs/mermaid-0.3.0/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Knut Sveidqvist
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
diff --git a/_freeze/site_libs/mermaid-0.3.0/dist/mermaid.css b/_freeze/site_libs/mermaid-0.3.0/dist/mermaid.css
@@ -0,0 +1,275 @@
+/* Flowchart variables */
+/* Sequence Diagram variables */
+/* Gantt chart variables */
+.mermaid .label {
+ color: #333333;
+ font-weight: 400;
+}
+
+.mermaid .node rect,
+.node circle,
+.mermaid .node ellipse,
+.mermaid .node polygon {
+ fill: #ECECFF;
+ stroke: #CCCCFF;
+ stroke-width: 1px;
+}
+.mermaid .edgePath .path {
+ stroke: #333333;
+}
+
+.mermaid g .edgeLabel {
+ background-color: white;
+}
+
+.mermaid .cluster rect {
+ fill: #ffffde !important;
+ rx: 4 !important;
+ stroke: #aaaa33 !important;
+ stroke-width: 1px !important;
+}
+.mermaid .cluster text {
+ fill: #333333;
+}
+.mermaid .actor {
+ stroke: #CCCCFF;
+ fill: #ECECFF;
+}
+.mermaid text.actor {
+ fill: black;
+ stroke: none;
+}
+.mermaid .actor-line {
+ stroke: grey;
+}
+.mermaid .messageLine0 {
+ stroke-width: 1.5;
+ stroke-dasharray: "2 2";
+ stroke: #333333;
+}
+.mermaid .messageLine1 {
+ stroke-width: 1.5;
+ stroke-dasharray: "2 2";
+ stroke: #333333;
+}
+.mermaid #arrowhead {
+ fill: #333333;
+}
+.mermaid #crosshead path {
+ fill: #333333 !important;
+ stroke: #333333 !important;
+}
+.mermaid .messageText {
+ fill: #333333;
+ stroke: none;
+}
+.mermaid .labelBox {
+ stroke: #CCCCFF;
+ fill: #ECECFF;
+}
+.mermaid .labelText {
+ fill: black;
+ stroke: none;
+}
+.mermaid .loopText {
+ fill: black;
+ stroke: none;
+}
+.mermaid .loopLine {
+ stroke-width: 2;
+ stroke-dasharray: "2 2";
+ stroke: #CCCCFF;
+}
+.mermaid .note {
+ stroke: #aaaa33;
+ fill: #fff5ad;
+}
+.mermaid .noteText {
+ fill: black;
+ stroke: none;
+ font-family: 'trebuchet ms', verdana, arial;
+ font-size: 14px;
+}
+/** Section styling */
+.mermaid .section {
+ stroke: none;
+ opacity: 0.2;
+}
+.mermaid .section0 {
+ fill: rgba(102, 102, 255, 0.49);
+}
+.mermaid .section2 {
+ fill: #fff400;
+}
+.mermaid .section1,
+.mermaid .section3 {
+ fill: white;
+ opacity: 0.2;
+}
+.mermaid .sectionTitle0 {
+ fill: #333333;
+}
+.mermaid .sectionTitle1 {
+ fill: #333333;
+}
+.mermaid .sectionTitle2 {
+ fill: #333333;
+}
+.mermaid .sectionTitle3 {
+ fill: #333333;
+}
+.mermaid .sectionTitle {
+ text-anchor: start;
+ font-size: 11px;
+ text-height: 14px;
+}
+/* Grid and axis */
+.mermaid .grid .tick {
+ stroke: lightgrey;
+ opacity: 0.3;
+ shape-rendering: crispEdges;
+}
+.mermaid .grid path {
+ stroke-width: 0;
+}
+/* Today line */
+.mermaid .today {
+ fill: none;
+ stroke: red;
+ stroke-width: 2px;
+}
+/* Task styling */
+/* Default task */
+.mermaid .task {
+ stroke-width: 2;
+}
+.mermaid .taskText {
+ text-anchor: middle;
+ font-size: 11px;
+}
+.mermaid .taskTextOutsideRight {
+ fill: black;
+ text-anchor: start;
+ font-size: 11px;
+}
+.mermaid .taskTextOutsideLeft {
+ fill: black;
+ text-anchor: end;
+ font-size: 11px;
+}
+/* Specific task settings for the sections*/
+.mermaid .taskText0,
+.mermaid .taskText1,
+.mermaid .taskText2,
+.mermaid .taskText3 {
+ fill: white;
+}
+.mermaid .task0,
+.mermaid .task1,
+.mermaid .task2,
+.mermaid .task3 {
+ fill: #8a90dd;
+ stroke: #534fbc;
+}
+.mermaid .taskTextOutside0,
+.mermaid .taskTextOutside2 {
+ fill: black;
+}
+.mermaid .taskTextOutside1,
+.mermaid .taskTextOutside3 {
+ fill: black;
+}
+/* Active task */
+.mermaid .active0,
+.mermaid .active1,
+.mermaid .active2,
+.mermaid .active3 {
+ fill: #bfc7ff;
+ stroke: #534fbc;
+}
+.mermaid .activeText0,
+.mermaid .activeText1,
+.mermaid .activeText2,
+.mermaid .activeText3 {
+ fill: black !important;
+}
+/* Completed task */
+.mermaid .done0,
+.mermaid .done1,
+.mermaid .done2,
+.mermaid .done3 {
+ stroke: grey;
+ fill: lightgrey;
+ stroke-width: 2;
+}
+.mermaid .doneText0,
+.mermaid .doneText1,
+.mermaid .doneText2,
+.mermaid .doneText3 {
+ fill: black !important;
+}
+/* Tasks on the critical line */
+.mermaid .crit0,
+.mermaid .crit1,
+.mermaid .crit2,
+.mermaid .crit3 {
+ stroke: #ff8888;
+ fill: red;
+ stroke-width: 2;
+}
+.mermaid .activeCrit0,
+.mermaid .activeCrit1,
+.mermaid .activeCrit2,
+.mermaid .activeCrit3 {
+ stroke: #ff8888;
+ fill: #bfc7ff;
+ stroke-width: 2;
+}
+.mermaid .doneCrit0,
+.mermaid .doneCrit1,
+.mermaid .doneCrit2,
+.mermaid .doneCrit3 {
+ stroke: #ff8888;
+ fill: lightgrey;
+ stroke-width: 2;
+ cursor: pointer;
+ shape-rendering: crispEdges;
+}
+.mermaid .doneCritText0,
+.mermaid .doneCritText1,
+.mermaid .doneCritText2,
+.mermaid .doneCritText3 {
+ fill: black !important;
+}
+.mermaid .activeCritText0,
+.mermaid .activeCritText1,
+.mermaid .activeCritText2,
+.mermaid .activeCritText3 {
+ fill: black !important;
+}
+.mermaid .titleText {
+ text-anchor: middle;
+ font-size: 18px;
+ fill: black;
+}
+/*
+
+
+*/
+.node text {
+ font-family: 'trebuchet ms', verdana, arial;
+ font-size: 14px;
+}
+div.mermaidTooltip {
+ position: absolute;
+ text-align: center;
+ max-width: 200px;
+ padding: 2px;
+ font-family: 'trebuchet ms', verdana, arial;
+ font-size: 12px;
+ background: #ffffde;
+ border: 1px solid #aaaa33;
+ border-radius: 2px;
+ pointer-events: none;
+ z-index: 100;
+}
diff --git a/_freeze/site_libs/mermaid-0.3.0/dist/mermaid.slim.min.js b/_freeze/site_libs/mermaid-0.3.0/dist/mermaid.slim.min.js
@@ -0,0 +1,12 @@
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V:"║",boxvh:"┼",boxvH:"╪",boxVh:"╫",boxVH:"╬",boxvl:"┤",boxvL:"╡",boxVl:"╢",boxVL:"╣",boxvr:"├",boxvR:"╞",boxVr:"╟",boxVR:"╠",bprime:"‵",breve:"˘",Breve:"˘",brvbar:"¦",bscr:"𝒷",Bscr:"ℬ",bsemi:"⁏",bsim:"∽",bsime:"⋍",bsolb:"⧅",bsol:"\\",bsolhsub:"⟈",bull:"•",bullet:"•",bump:"≎",bumpE:"⪮",bumpe:"≏",Bumpeq:"≎",bumpeq:"≏",Cacute:"Ć",cacute:"ć",capand:"⩄",capbrcup:"⩉",capcap:"⩋",cap:"∩",Cap:"⋒",capcup:"⩇",capdot:"⩀",CapitalDifferentialD:"ⅅ",caps:"∩︀",caret:"⁁",caron:"ˇ",Cayleys:"ℭ",ccaps:"⩍",Ccaron:"Č",ccaron:"č",Ccedil:"Ç",ccedil:"ç",Ccirc:"Ĉ",ccirc:"ĉ",Cconint:"∰",ccups:"⩌",ccupssm:"⩐",Cdot:"Ċ",cdot:"ċ",cedil:"¸",Cedilla:"¸",cemptyv:"⦲",cent:"¢",centerdot:"·",CenterDot:"·",cfr:"𝔠",Cfr:"ℭ",CHcy:"Ч",chcy:"ч",check:"✓",checkmark:"✓",Chi:"Χ",chi:"χ",circ:"ˆ",circeq:"≗",circlearrowleft:"↺",circlearrowright:"↻",circledast:"⊛",circledcirc:"⊚",circleddash:"⊝",CircleDot:"⊙",circledR:"®",circledS:"Ⓢ",CircleMinus:"⊖",CirclePlus:"⊕",CircleTimes:"⊗",cir:"○",cirE:"⧃",cire:"≗",cirfnint:"⨐",cirmid:"⫯",cirscir:"⧂",ClockwiseContourIntegral:"∲",CloseCurlyDoubleQuote:"”",CloseCurlyQuote:"’",clubs:"♣",clubsuit:"♣",colon:":",Colon:"∷",Colone:"⩴",colone:"≔",coloneq:"≔",comma:",",commat:"@",comp:"∁",compfn:"∘",complement:"∁",complexes:"ℂ",cong:"≅",congdot:"⩭",Congruent:"≡",conint:"∮",Conint:"∯",ContourIntegral:"∮",copf:"𝕔",Copf:"ℂ",coprod:"∐",Coproduct:"∐",copy:"©",COPY:"©",copysr:"℗",CounterClockwiseContourIntegral:"∳",crarr:"↵",cross:"✗",Cross:"⨯",Cscr:"𝒞",cscr:"𝒸",csub:"⫏",csube:"⫑",csup:"⫐",csupe:"⫒",ctdot:"⋯",cudarrl:"⤸",cudarrr:"⤵",cuepr:"⋞",cuesc:"⋟",cularr:"↶",cularrp:"⤽",cupbrcap:"⩈",cupcap:"⩆",CupCap:"≍",cup:"∪",Cup:"⋓",cupcup:"⩊",cupdot:"⊍",cupor:"⩅",cups:"∪︀",curarr:"↷",curarrm:"⤼",curlyeqprec:"⋞",curlyeqsucc:"⋟",curlyvee:"⋎",curlywedge:"⋏",curren:"¤",curvearrowleft:"↶",curvearrowright:"↷",cuvee:"⋎",cuwed:"⋏",cwconint:"∲",cwint:"∱",cylcty:"⌭",dagger:"†",Dagger:"‡",daleth:"ℸ",darr:"↓",Darr:"↡",dArr:"⇓",dash:"‐",Dashv:"⫤",dashv:"⊣",dbkarow:"⤏",dblac:"˝",Dcaron:"Ď",dcaron:"ď",Dcy:"Д",dcy:"д",ddagger:"‡",ddarr:"⇊",DD:"ⅅ",dd:"ⅆ",DDotrahd:"⤑",ddotseq:"⩷",deg:"°",Del:"∇",Delta:"Δ",delta:"δ",demptyv:"⦱",dfisht:"⥿",Dfr:"𝔇",dfr:"𝔡",dHar:"⥥",dharl:"⇃",dharr:"⇂",DiacriticalAcute:"´",DiacriticalDot:"˙",DiacriticalDoubleAcute:"˝",DiacriticalGrave:"`",DiacriticalTilde:"˜",diam:"⋄",diamond:"⋄",Diamond:"⋄",diamondsuit:"♦",diams:"♦",die:"¨",DifferentialD:"ⅆ",digamma:"ϝ",disin:"⋲",div:"÷",divide:"÷",divideontimes:"⋇",divonx:"⋇",DJcy:"Ђ",djcy:"ђ",dlcorn:"⌞",dlcrop:"⌍",dollar:"$",Dopf:"𝔻",dopf:"𝕕",Dot:"¨",dot:"˙",DotDot:"⃜",doteq:"≐",doteqdot:"≑",DotEqual:"≐",dotminus:"∸",dotplus:"∔",dotsquare:"⊡",doublebarwedge:"⌆",DoubleContourIntegral:"∯",DoubleDot:"¨",DoubleDownArrow:"⇓",DoubleLeftArrow:"⇐",DoubleLeftRightArrow:"⇔",DoubleLeftTee:"⫤",DoubleLongLeftArrow:"⟸",DoubleLongLeftRightArrow:"⟺",DoubleLongRightArrow:"⟹",DoubleRightArrow:"⇒",DoubleRightTee:"⊨",DoubleUpArrow:"⇑",DoubleUpDownArrow:"⇕",DoubleVerticalBar:"∥",DownArrowBar:"⤓",downarrow:"↓",DownArrow:"↓",Downarrow:"⇓",DownArrowUpArrow:"⇵",DownBreve:"̑",downdownarrows:"⇊",downharpoonleft:"⇃",downharpoonright:"⇂",DownLeftRightVector:"⥐",DownLeftTeeVector:"⥞",DownLeftVectorBar:"⥖",DownLeftVector:"↽",DownRightTeeVector:"⥟",DownRightVectorBar:"⥗",DownRightVector:"⇁",DownTeeArrow:"↧",DownTee:"⊤",drbkarow:"⤐",drcorn:"⌟",drcrop:"⌌",Dscr:"𝒟",dscr:"𝒹",DScy:"Ѕ",dscy:"ѕ",dsol:"⧶",Dstrok:"Đ",dstrok:"đ",dtdot:"⋱",dtri:"▿",dtrif:"▾",duarr:"⇵",duhar:"⥯",dwangle:"⦦",DZcy:"Џ",dzcy:"џ",dzigrarr:"⟿",Eacute:"É",eacute:"é",easter:"⩮",Ecaron:"Ě",ecaron:"ě",Ecirc:"Ê",ecirc:"ê",ecir:"≖",ecolon:"≕",Ecy:"Э",ecy:"э",eDDot:"⩷",Edot:"Ė",edot:"ė",eDot:"≑",ee:"ⅇ",efDot:"≒",Efr:"𝔈",efr:"𝔢",eg:"⪚",Egrave:"È",egrave:"è",egs:"⪖",egsdot:"⪘",el:"⪙",Element:"∈",elinters:"⏧",ell:"ℓ",els:"⪕",elsdot:"⪗",Emacr:"Ē",emacr:"ē",empty:"∅",emptyset:"∅",EmptySmallSquare:"◻",emptyv:"∅",EmptyVerySmallSquare:"▫",emsp13:" ",emsp14:" ",emsp:" ",ENG:"Ŋ",eng:"ŋ",ensp:" ",Eogon:"Ę",eogon:"ę",Eopf:"𝔼",eopf:"𝕖",epar:"⋕",eparsl:"⧣",eplus:"⩱",epsi:"ε",Epsilon:"Ε",epsilon:"ε",epsiv:"ϵ",eqcirc:"≖",eqcolon:"≕",eqsim:"≂",eqslantgtr:"⪖",eqslantless:"⪕",Equal:"⩵",equals:"=",EqualTilde:"≂",equest:"≟",Equilibrium:"⇌",equiv:"≡",equivDD:"⩸",eqvparsl:"⧥",erarr:"⥱",erDot:"≓",escr:"ℯ",Escr:"ℰ",esdot:"≐",Esim:"⩳",esim:"≂",Eta:"Η",eta:"η",ETH:"Ð",eth:"ð",Euml:"Ë",euml:"ë",euro:"€",excl:"!",exist:"∃",Exists:"∃",expectation:"ℰ",exponentiale:"ⅇ",ExponentialE:"ⅇ",fallingdotseq:"≒",Fcy:"Ф",fcy:"ф",female:"♀",ffilig:"ffi",fflig:"ff",ffllig:"ffl",Ffr:"𝔉",ffr:"𝔣",filig:"fi",FilledSmallSquare:"◼",FilledVerySmallSquare:"▪",fjlig:"fj",flat:"♭",fllig:"fl",fltns:"▱",fnof:"ƒ",Fopf:"𝔽",fopf:"𝕗",forall:"∀",ForAll:"∀",fork:"⋔",forkv:"⫙",Fouriertrf:"ℱ",fpartint:"⨍",frac12:"½",frac13:"⅓",frac14:"¼",frac15:"⅕",frac16:"⅙",frac18:"⅛",frac23:"⅔",frac25:"⅖",frac34:"¾",frac35:"⅗",frac38:"⅜",frac45:"⅘",frac56:"⅚",frac58:"⅝",frac78:"⅞",frasl:"⁄",frown:"⌢",fscr:"𝒻",Fscr:"ℱ",gacute:"ǵ",Gamma:"Γ",gamma:"γ",Gammad:"Ϝ",gammad:"ϝ",gap:"⪆",Gbreve:"Ğ",gbreve:"ğ",Gcedil:"Ģ",Gcirc:"Ĝ",gcirc:"ĝ",Gcy:"Г",gcy:"г",Gdot:"Ġ",gdot:"ġ",ge:"≥",gE:"≧",gEl:"⪌",gel:"⋛",geq:"≥",geqq:"≧",geqslant:"⩾",gescc:"⪩",ges:"⩾",gesdot:"⪀",gesdoto:"⪂",gesdotol:"⪄",gesl:"⋛︀",gesles:"⪔",Gfr:"𝔊",gfr:"𝔤",gg:"≫",Gg:"⋙",ggg:"⋙",gimel:"ℷ",GJcy:"Ѓ",gjcy:"ѓ",gla:"⪥",gl:"≷",glE:"⪒",glj:"⪤",gnap:"⪊",gnapprox:"⪊",gne:"⪈",gnE:"≩",gneq:"⪈",gneqq:"≩",gnsim:"⋧",Gopf:"𝔾",gopf:"𝕘",grave:"`",GreaterEqual:"≥",GreaterEqualLess:"⋛",GreaterFullEqual:"≧",GreaterGreater:"⪢",GreaterLess:"≷",GreaterSlantEqual:"⩾",GreaterTilde:"≳",Gscr:"𝒢",gscr:"ℊ",gsim:"≳",gsime:"⪎",gsiml:"⪐",gtcc:"⪧",gtcir:"⩺",gt:">",GT:">",Gt:"≫",gtdot:"⋗",gtlPar:"⦕",gtquest:"⩼",gtrapprox:"⪆",gtrarr:"⥸",gtrdot:"⋗",gtreqless:"⋛",gtreqqless:"⪌",gtrless:"≷",gtrsim:"≳",gvertneqq:"≩︀",gvnE:"≩︀",Hacek:"ˇ",hairsp:" ",half:"½",hamilt:"ℋ",HARDcy:"Ъ",hardcy:"ъ",harrcir:"⥈",harr:"↔",hArr:"⇔",harrw:"↭",Hat:"^",hbar:"ℏ",Hcirc:"Ĥ",hcirc:"ĥ",hearts:"♥",heartsuit:"♥",hellip:"…",hercon:"⊹",hfr:"𝔥",Hfr:"ℌ",HilbertSpace:"ℋ",hksearow:"⤥",hkswarow:"⤦",hoarr:"⇿",homtht:"∻",hookleftarrow:"↩",hookrightarrow:"↪",hopf:"𝕙",Hopf:"ℍ",horbar:"―",HorizontalLine:"─",hscr:"𝒽",Hscr:"ℋ",hslash:"ℏ",Hstrok:"Ħ",hstrok:"ħ",HumpDownHump:"≎",HumpEqual:"≏",hybull:"⁃",hyphen:"‐",Iacute:"Í",iacute:"í",ic:"",Icirc:"Î",icirc:"î",Icy:"И",icy:"и",Idot:"İ",IEcy:"Е",iecy:"е",iexcl:"¡",iff:"⇔",ifr:"𝔦",Ifr:"ℑ",Igrave:"Ì",igrave:"ì",ii:"ⅈ",iiiint:"⨌",iiint:"∭",iinfin:"⧜",iiota:"℩",IJlig:"IJ",ijlig:"ij",Imacr:"Ī",imacr:"ī",image:"ℑ",ImaginaryI:"ⅈ",imagline:"ℐ",imagpart:"ℑ",imath:"ı",Im:"ℑ",imof:"⊷",imped:"Ƶ",Implies:"⇒",incare:"℅","in":"∈",infin:"∞",infintie:"⧝",inodot:"ı",intcal:"⊺","int":"∫",Int:"∬",integers:"ℤ",Integral:"∫",intercal:"⊺",Intersection:"⋂",intlarhk:"⨗",intprod:"⨼",InvisibleComma:"",InvisibleTimes:"",IOcy:"Ё",iocy:"ё",Iogon:"Į",iogon:"į",Iopf:"𝕀",iopf:"𝕚",Iota:"Ι",iota:"ι",iprod:"⨼",iquest:"¿",iscr:"𝒾",Iscr:"ℐ",isin:"∈",isindot:"⋵",isinE:"⋹",isins:"⋴",isinsv:"⋳",isinv:"∈",it:"",Itilde:"Ĩ",itilde:"ĩ",Iukcy:"І",iukcy:"і",Iuml:"Ï",iuml:"ï",Jcirc:"Ĵ",jcirc:"ĵ",Jcy:"Й",jcy:"й",Jfr:"𝔍",jfr:"𝔧",jmath:"ȷ",Jopf:"𝕁",jopf:"𝕛",Jscr:"𝒥",jscr:"𝒿",Jsercy:"Ј",jsercy:"ј",Jukcy:"Є",jukcy:"є",Kappa:"Κ",kappa:"κ",kappav:"ϰ",Kcedil:"Ķ",kcedil:"ķ",Kcy:"К",kcy:"к",Kfr:"𝔎",kfr:"𝔨",kgreen:"ĸ",KHcy:"Х",khcy:"х",KJcy:"Ќ",kjcy:"ќ",Kopf:"𝕂",kopf:"𝕜",Kscr:"𝒦",kscr:"𝓀",lAarr:"⇚",Lacute:"Ĺ",lacute:"ĺ",laemptyv:"⦴",lagran:"ℒ",Lambda:"Λ",lambda:"λ",lang:"⟨",Lang:"⟪",langd:"⦑",langle:"⟨",lap:"⪅",Laplacetrf:"ℒ",laquo:"«",larrb:"⇤",larrbfs:"⤟",larr:"←",Larr:"↞",lArr:"⇐",larrfs:"⤝",larrhk:"↩",larrlp:"↫",larrpl:"⤹",larrsim:"⥳",larrtl:"↢",latail:"⤙",lAtail:"⤛",lat:"⪫",late:"⪭",lates:"⪭︀",lbarr:"⤌",lBarr:"⤎",lbbrk:"❲",lbrace:"{",lbrack:"[",lbrke:"⦋",lbrksld:"⦏",lbrkslu:"⦍",Lcaron:"Ľ",lcaron:"ľ",Lcedil:"Ļ",lcedil:"ļ",lceil:"⌈",lcub:"{",Lcy:"Л",lcy:"л",ldca:"⤶",ldquo:"“",ldquor:"„",ldrdhar:"⥧",ldrushar:"⥋",ldsh:"↲",le:"≤",lE:"≦",LeftAngleBracket:"⟨",LeftArrowBar:"⇤",leftarrow:"←",LeftArrow:"←",Leftarrow:"⇐",LeftArrowRightArrow:"⇆",leftarrowtail:"↢",LeftCeiling:"⌈",LeftDoubleBracket:"⟦",LeftDownTeeVector:"⥡",LeftDownVectorBar:"⥙",LeftDownVector:"⇃",LeftFloor:"⌊",leftharpoondown:"↽",leftharpoonup:"↼",leftleftarrows:"⇇",leftrightarrow:"↔",LeftRightArrow:"↔",Leftrightarrow:"⇔",leftrightarrows:"⇆",leftrightharpoons:"⇋",leftrightsquigarrow:"↭",LeftRightVector:"⥎",LeftTeeArrow:"↤",LeftTee:"⊣",LeftTeeVector:"⥚",leftthreetimes:"⋋",LeftTriangleBar:"⧏",LeftTriangle:"⊲",LeftTriangleEqual:"⊴",LeftUpDownVector:"⥑",LeftUpTeeVector:"⥠",LeftUpVectorBar:"⥘",LeftUpVector:"↿",LeftVectorBar:"⥒",LeftVector:"↼",lEg:"⪋",leg:"⋚",leq:"≤",leqq:"≦",leqslant:"⩽",lescc:"⪨",les:"⩽",lesdot:"⩿",lesdoto:"⪁",lesdotor:"⪃",lesg:"⋚︀",lesges:"⪓",lessapprox:"⪅",lessdot:"⋖",lesseqgtr:"⋚",lesseqqgtr:"⪋",LessEqualGreater:"⋚",LessFullEqual:"≦",LessGreater:"≶",lessgtr:"≶",LessLess:"⪡",lesssim:"≲",LessSlantEqual:"⩽",LessTilde:"≲",lfisht:"⥼",lfloor:"⌊",Lfr:"𝔏",lfr:"𝔩",lg:"≶",lgE:"⪑",lHar:"⥢",lhard:"↽",lharu:"↼",lharul:"⥪",lhblk:"▄",LJcy:"Љ",ljcy:"љ",llarr:"⇇",ll:"≪",Ll:"⋘",llcorner:"⌞",Lleftarrow:"⇚",llhard:"⥫",lltri:"◺",Lmidot:"Ŀ",lmidot:"ŀ",lmoustache:"⎰",lmoust:"⎰",lnap:"⪉",lnapprox:"⪉",lne:"⪇",lnE:"≨",lneq:"⪇",lneqq:"≨",lnsim:"⋦",loang:"⟬",loarr:"⇽",lobrk:"⟦",longleftarrow:"⟵",LongLeftArrow:"⟵",Longleftarrow:"⟸",longleftrightarrow:"⟷",LongLeftRightArrow:"⟷",Longleftrightarrow:"⟺",longmapsto:"⟼",longrightarrow:"⟶",LongRightArrow:"⟶",Longrightarrow:"⟹",looparrowleft:"↫",looparrowright:"↬",lopar:"⦅",Lopf:"𝕃",lopf:"𝕝",loplus:"⨭",lotimes:"⨴",lowast:"∗",lowbar:"_",LowerLeftArrow:"↙",LowerRightArrow:"↘",loz:"◊",lozenge:"◊",lozf:"⧫",lpar:"(",lparlt:"⦓",lrarr:"⇆",lrcorner:"⌟",lrhar:"⇋",lrhard:"⥭",lrm:"",lrtri:"⊿",lsaquo:"‹",lscr:"𝓁",Lscr:"ℒ",lsh:"↰",Lsh:"↰",lsim:"≲",lsime:"⪍",lsimg:"⪏",lsqb:"[",lsquo:"‘",lsquor:"‚",Lstrok:"Ł",lstrok:"ł",ltcc:"⪦",ltcir:"⩹",lt:"<",LT:"<",Lt:"≪",ltdot:"⋖",lthree:"⋋",ltimes:"⋉",ltlarr:"⥶",ltquest:"⩻",ltri:"◃",ltrie:"⊴",ltrif:"◂",ltrPar:"⦖",lurdshar:"⥊",luruhar:"⥦",lvertneqq:"≨︀",lvnE:"≨︀",macr:"¯",male:"♂",malt:"✠",maltese:"✠",Map:"⤅",map:"↦",mapsto:"↦",mapstodown:"↧",mapstoleft:"↤",mapstoup:"↥",marker:"▮",mcomma:"⨩",Mcy:"М",mcy:"м",mdash:"—",mDDot:"∺",measuredangle:"∡",MediumSpace:" ",Mellintrf:"ℳ",Mfr:"𝔐",mfr:"𝔪",mho:"℧",micro:"µ",midast:"*",midcir:"⫰",mid:"∣",middot:"·",minusb:"⊟",minus:"−",minusd:"∸",minusdu:"⨪",MinusPlus:"∓",mlcp:"⫛",mldr:"…",mnplus:"∓",models:"⊧",Mopf:"𝕄",mopf:"𝕞",mp:"∓",mscr:"𝓂",Mscr:"ℳ",mstpos:"∾",Mu:"Μ",mu:"μ",multimap:"⊸",mumap:"⊸",nabla:"∇",Nacute:"Ń",nacute:"ń",nang:"∠⃒",nap:"≉",napE:"⩰̸",napid:"≋̸",napos:"ʼn",napprox:"≉",natural:"♮",naturals:"ℕ",natur:"♮",nbsp:" ",nbump:"≎̸",nbumpe:"≏̸",ncap:"⩃",Ncaron:"Ň",ncaron:"ň",Ncedil:"Ņ",ncedil:"ņ",ncong:"≇",ncongdot:"⩭̸",ncup:"⩂",Ncy:"Н",ncy:"н",ndash:"–",nearhk:"⤤",nearr:"↗",neArr:"⇗",nearrow:"↗",ne:"≠",nedot:"≐̸",NegativeMediumSpace:"",NegativeThickSpace:"",NegativeThinSpace:"",NegativeVeryThinSpace:"",nequiv:"≢",nesear:"⤨",nesim:"≂̸",NestedGreaterGreater:"≫",NestedLessLess:"≪",NewLine:"\n",nexist:"∄",nexists:"∄",Nfr:"𝔑",nfr:"𝔫",ngE:"≧̸",nge:"≱",ngeq:"≱",ngeqq:"≧̸",ngeqslant:"⩾̸",nges:"⩾̸",nGg:"⋙̸",ngsim:"≵",nGt:"≫⃒",ngt:"≯",ngtr:"≯",nGtv:"≫̸",nharr:"↮",nhArr:"⇎",nhpar:"⫲",ni:"∋",nis:"⋼",nisd:"⋺",niv:"∋",NJcy:"Њ",njcy:"њ",nlarr:"↚",nlArr:"⇍",nldr:"‥",nlE:"≦̸",nle:"≰",nleftarrow:"↚",nLeftarrow:"⇍",nleftrightarrow:"↮",nLeftrightarrow:"⇎",nleq:"≰",nleqq:"≦̸",nleqslant:"⩽̸",nles:"⩽̸",nless:"≮",nLl:"⋘̸",nlsim:"≴",nLt:"≪⃒",nlt:"≮",nltri:"⋪",nltrie:"⋬",nLtv:"≪̸",nmid:"∤",NoBreak:"",NonBreakingSpace:" ",nopf:"𝕟",Nopf:"ℕ",Not:"⫬",not:"¬",NotCongruent:"≢",NotCupCap:"≭",NotDoubleVerticalBar:"∦",NotElement:"∉",NotEqual:"≠",NotEqualTilde:"≂̸",NotExists:"∄",NotGreater:"≯",NotGreaterEqual:"≱",NotGreaterFullEqual:"≧̸",NotGreaterGreater:"≫̸",NotGreaterLess:"≹",NotGreaterSlantEqual:"⩾̸",NotGreaterTilde:"≵",NotHumpDownHump:"≎̸",NotHumpEqual:"≏̸",notin:"∉",notindot:"⋵̸",notinE:"⋹̸",notinva:"∉",notinvb:"⋷",notinvc:"⋶",NotLeftTriangleBar:"⧏̸",NotLeftTriangle:"⋪",NotLeftTriangleEqual:"⋬",NotLess:"≮",NotLessEqual:"≰",NotLessGreater:"≸",NotLessLess:"≪̸",NotLessSlantEqual:"⩽̸",NotLessTilde:"≴",NotNestedGreaterGreater:"⪢̸",NotNestedLessLess:"⪡̸",notni:"∌",notniva:"∌",notnivb:"⋾",notnivc:"⋽",NotPrecedes:"⊀",NotPrecedesEqual:"⪯̸",NotPrecedesSlantEqual:"⋠",NotReverseElement:"∌",NotRightTriangleBar:"⧐̸",NotRightTriangle:"⋫",NotRightTriangleEqual:"⋭",NotSquareSubset:"⊏̸",NotSquareSubsetEqual:"⋢",NotSquareSuperset:"⊐̸",NotSquareSupersetEqual:"⋣",NotSubset:"⊂⃒",NotSubsetEqual:"⊈",NotSucceeds:"⊁",NotSucceedsEqual:"⪰̸",NotSucceedsSlantEqual:"⋡",NotSucceedsTilde:"≿̸",NotSuperset:"⊃⃒",NotSupersetEqual:"⊉",NotTilde:"≁",NotTildeEqual:"≄",NotTildeFullEqual:"≇",NotTildeTilde:"≉",NotVerticalBar:"∤",nparallel:"∦",npar:"∦",nparsl:"⫽⃥",npart:"∂̸",npolint:"⨔",npr:"⊀",nprcue:"⋠",nprec:"⊀",npreceq:"⪯̸",npre:"⪯̸",nrarrc:"⤳̸",nrarr:"↛",nrArr:"⇏",nrarrw:"↝̸",nrightarrow:"↛",nRightarrow:"⇏",nrtri:"⋫",nrtrie:"⋭",nsc:"⊁",nsccue:"⋡",nsce:"⪰̸",Nscr:"𝒩",nscr:"𝓃",nshortmid:"∤",nshortparallel:"∦",nsim:"≁",nsime:"≄",nsimeq:"≄",nsmid:"∤",nspar:"∦",nsqsube:"⋢",nsqsupe:"⋣",nsub:"⊄",nsubE:"⫅̸",nsube:"⊈",nsubset:"⊂⃒",nsubseteq:"⊈",nsubseteqq:"⫅̸",nsucc:"⊁",nsucceq:"⪰̸",nsup:"⊅",nsupE:"⫆̸",nsupe:"⊉",nsupset:"⊃⃒",nsupseteq:"⊉",nsupseteqq:"⫆̸",ntgl:"≹",Ntilde:"Ñ",ntilde:"ñ",ntlg:"≸",ntriangleleft:"⋪",ntrianglelefteq:"⋬",ntriangleright:"⋫",ntrianglerighteq:"⋭",Nu:"Ν",nu:"ν",num:"#",numero:"№",numsp:" ",nvap:"≍⃒",nvdash:"⊬",nvDash:"⊭",nVdash:"⊮",nVDash:"⊯",nvge:"≥⃒",nvgt:">⃒",nvHarr:"⤄",nvinfin:"⧞",nvlArr:"⤂",nvle:"≤⃒",nvlt:"<⃒",nvltrie:"⊴⃒",nvrArr:"⤃",nvrtrie:"⊵⃒",nvsim:"∼⃒",nwarhk:"⤣",nwarr:"↖",nwArr:"⇖",nwarrow:"↖",nwnear:"⤧",Oacute:"Ó",oacute:"ó",oast:"⊛",Ocirc:"Ô",ocirc:"ô",ocir:"⊚",Ocy:"О",ocy:"о",odash:"⊝",Odblac:"Ő",odblac:"ő",odiv:"⨸",odot:"⊙",odsold:"⦼",OElig:"Œ",oelig:"œ",ofcir:"⦿",Ofr:"𝔒",ofr:"𝔬",ogon:"˛",Ograve:"Ò",ograve:"ò",ogt:"⧁",ohbar:"⦵",ohm:"Ω",oint:"∮",olarr:"↺",olcir:"⦾",olcross:"⦻",oline:"‾",olt:"⧀",Omacr:"Ō",omacr:"ō",Omega:"Ω",omega:"ω",Omicron:"Ο",omicron:"ο",omid:"⦶",ominus:"⊖",Oopf:"𝕆",oopf:"𝕠",opar:"⦷",OpenCurlyDoubleQuote:"“",OpenCurlyQuote:"‘",operp:"⦹",oplus:"⊕",orarr:"↻",Or:"⩔",or:"∨",ord:"⩝",order:"ℴ",orderof:"ℴ",ordf:"ª",ordm:"º",origof:"⊶",oror:"⩖",orslope:"⩗",orv:"⩛",oS:"Ⓢ",Oscr:"𝒪",oscr:"ℴ",Oslash:"Ø",oslash:"ø",osol:"⊘",Otilde:"Õ",otilde:"õ",otimesas:"⨶",Otimes:"⨷",otimes:"⊗",Ouml:"Ö",ouml:"ö",ovbar:"⌽",OverBar:"‾",OverBrace:"⏞",OverBracket:"⎴",OverParenthesis:"⏜",para:"¶",parallel:"∥",par:"∥",parsim:"⫳",parsl:"⫽",part:"∂",PartialD:"∂",Pcy:"П",pcy:"п",percnt:"%",period:".",permil:"‰",perp:"⊥",pertenk:"‱",Pfr:"𝔓",pfr:"𝔭",Phi:"Φ",phi:"φ",phiv:"ϕ",phmmat:"ℳ",phone:"☎",Pi:"Π",pi:"π",pitchfork:"⋔",piv:"ϖ",planck:"ℏ",planckh:"ℎ",plankv:"ℏ",plusacir:"⨣",plusb:"⊞",pluscir:"⨢",plus:"+",plusdo:"∔",plusdu:"⨥",pluse:"⩲",PlusMinus:"±",plusmn:"±",plussim:"⨦",plustwo:"⨧",pm:"±",Poincareplane:"ℌ",pointint:"⨕",popf:"𝕡",Popf:"ℙ",pound:"£",prap:"⪷",Pr:"⪻",pr:"≺",prcue:"≼",precapprox:"⪷",prec:"≺",preccurlyeq:"≼",Precedes:"≺",PrecedesEqual:"⪯",PrecedesSlantEqual:"≼",PrecedesTilde:"≾",preceq:"⪯",precnapprox:"⪹",precneqq:"⪵",precnsim:"⋨",pre:"⪯",prE:"⪳",precsim:"≾",prime:"′",Prime:"″",primes:"ℙ",prnap:"⪹",prnE:"⪵",prnsim:"⋨",prod:"∏",Product:"∏",profalar:"⌮",profline:"⌒",profsurf:"⌓",prop:"∝",Proportional:"∝",Proportion:"∷",propto:"∝",prsim:"≾",prurel:"⊰",Pscr:"𝒫",pscr:"𝓅",Psi:"Ψ",psi:"ψ",puncsp:" ",Qfr:"𝔔",qfr:"𝔮",qint:"⨌",qopf:"𝕢",Qopf:"ℚ",qprime:"⁗",Qscr:"𝒬",qscr:"𝓆",quaternions:"ℍ",quatint:"⨖",quest:"?",questeq:"≟",quot:'"',QUOT:'"',rAarr:"⇛",race:"∽̱",Racute:"Ŕ",racute:"ŕ",radic:"√",raemptyv:"⦳",rang:"⟩",Rang:"⟫",rangd:"⦒",range:"⦥",rangle:"⟩",raquo:"»",rarrap:"⥵",rarrb:"⇥",rarrbfs:"⤠",rarrc:"⤳",rarr:"→",Rarr:"↠",rArr:"⇒",rarrfs:"⤞",rarrhk:"↪",rarrlp:"↬",rarrpl:"⥅",rarrsim:"⥴",Rarrtl:"⤖",rarrtl:"↣",rarrw:"↝",ratail:"⤚",rAtail:"⤜",ratio:"∶",rationals:"ℚ",rbarr:"⤍",rBarr:"⤏",RBarr:"⤐",rbbrk:"❳",rbrace:"}",rbrack:"]",rbrke:"⦌",rbrksld:"⦎",rbrkslu:"⦐",Rcaron:"Ř",rcaron:"ř",Rcedil:"Ŗ",rcedil:"ŗ",
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r=function(t,e){this.message=t,this.hash=e};throw r.prototype=new Error,new r(t,e)}this.trace(t)},parse:function(t){var e=this,r=[0],n=[null],i=[],a=this.table,s="",o=0,u=0,c=0,l=2,h=1,d=i.slice.call(arguments,1),f=Object.create(this.lexer),p={yy:{}};for(var g in this.yy)Object.prototype.hasOwnProperty.call(this.yy,g)&&(p.yy[g]=this.yy[g]);f.setInput(t,p.yy),p.yy.lexer=f,p.yy.parser=this,"undefined"==typeof f.yylloc&&(f.yylloc={});var m=f.yylloc;i.push(m);var y=f.options&&f.options.ranges;"function"==typeof p.yy.parseError?this.parseError=p.yy.parseError:this.parseError=Object.getPrototypeOf(this).parseError;for(var v,b,_,A,w,x,E,k,D,C=function(){var t;return t=f.lex()||h,"number"!=typeof t&&(t=e.symbols_[t]||t),t},F={};;){if(_=r[r.length-1],this.defaultActions[_]?A=this.defaultActions[_]:((null===v||"undefined"==typeof v)&&(v=C()),A=a[_]&&a[_][v]),"undefined"==typeof A||!A.length||!A[0]){var T="";D=[];for(x in a[_])this.terminals_[x]&&x>l&&D.push("'"+this.terminals_[x]+"'");T=f.showPosition?"Parse error on line "+(o+1)+":\n"+f.showPosition()+"\nExpecting "+D.join(", ")+", got '"+(this.terminals_[v]||v)+"'":"Parse error on line "+(o+1)+": Unexpected "+(v==h?"end of input":"'"+(this.terminals_[v]||v)+"'"),this.parseError(T,{text:f.match,token:this.terminals_[v]||v,line:f.yylineno,loc:m,expected:D})}if(A[0]instanceof Array&&A.length>1)throw new Error("Parse Error: multiple actions possible at state: "+_+", token: "+v);switch(A[0]){case 1:r.push(v),n.push(f.yytext),i.push(f.yylloc),r.push(A[1]),v=null,b?(v=b,b=null):(u=f.yyleng,s=f.yytext,o=f.yylineno,m=f.yylloc,c>0&&c--);break;case 2:if(E=this.productions_[A[1]][1],F.$=n[n.length-E],F._$={first_line:i[i.length-(E||1)].first_line,last_line:i[i.length-1].last_line,first_column:i[i.length-(E||1)].first_column,last_column:i[i.length-1].last_column},y&&(F._$.range=[i[i.length-(E||1)].range[0],i[i.length-1].range[1]]),w=this.performAction.apply(F,[s,u,o,p.yy,A[1],n,i].concat(d)),"undefined"!=typeof w)return w;E&&(r=r.slice(0,-1*E*2),n=n.slice(0,-1*E),i=i.slice(0,-1*E)),r.push(this.productions_[A[1]][0]),n.push(F.$),i.push(F._$),k=a[r[r.length-2]][r[r.length-1]],r.push(k);break;case 3:return!0}}return!0}},x=function(){var t={EOF:1,parseError:function(t,e){if(!this.yy.parser)throw new Error(t);this.yy.parser.parseError(t,e)},setInput:function(t,e){return this.yy=e||this.yy||{},this._input=t,this._more=this._backtrack=this.done=!1,this.yylineno=this.yyleng=0,this.yytext=this.matched=this.match="",this.conditionStack=["INITIAL"],this.yylloc={first_line:1,first_column:0,last_line:1,last_column:0},this.options.ranges&&(this.yylloc.range=[0,0]),this.offset=0,this},input:function(){var t=this._input[0];this.yytext+=t,this.yyleng++,this.offset++,this.match+=t,this.matched+=t;var e=t.match(/(?:\r\n?|\n).*/g);return e?(this.yylineno++,this.yylloc.last_line++):this.yylloc.last_column++,this.options.ranges&&this.yylloc.range[1]++,this._input=this._input.slice(1),t},unput:function(t){var e=t.length,r=t.split(/(?:\r\n?|\n)/g);this._input=t+this._input,this.yytext=this.yytext.substr(0,this.yytext.length-e),this.offset-=e;var n=this.match.split(/(?:\r\n?|\n)/g);this.match=this.match.substr(0,this.match.length-1),this.matched=this.matched.substr(0,this.matched.length-1),r.length-1&&(this.yylineno-=r.length-1);var i=this.yylloc.range;return this.yylloc={first_line:this.yylloc.first_line,last_line:this.yylineno+1,first_column:this.yylloc.first_column,last_column:r?(r.length===n.length?this.yylloc.first_column:0)+n[n.length-r.length].length-r[0].length:this.yylloc.first_column-e},this.options.ranges&&(this.yylloc.range=[i[0],i[0]+this.yyleng-e]),this.yyleng=this.yytext.length,this},more:function(){return this._more=!0,this},reject:function(){return this.options.backtrack_lexer?(this._backtrack=!0,this):this.parseError("Lexical error on line "+(this.yylineno+1)+". You can only invoke reject() in the lexer when the lexer is of the backtracking persuasion (options.backtrack_lexer = true).\n"+this.showPosition(),{text:"",token:null,line:this.yylineno})},less:function(t){this.unput(this.match.slice(t))},pastInput:function(){var t=this.matched.substr(0,this.matched.length-this.match.length);return(t.length>20?"...":"")+t.substr(-20).replace(/\n/g,"")},upcomingInput:function(){var t=this.match;return t.length<20&&(t+=this._input.substr(0,20-t.length)),(t.substr(0,20)+(t.length>20?"...":"")).replace(/\n/g,"")},showPosition:function(){var t=this.pastInput(),e=new Array(t.length+1).join("-");return t+this.upcomingInput()+"\n"+e+"^"},test_match:function(t,e){var r,n,i;if(this.options.backtrack_lexer&&(i={yylineno:this.yylineno,yylloc:{first_line:this.yylloc.first_line,last_line:this.last_line,first_column:this.yylloc.first_column,last_column:this.yylloc.last_column},yytext:this.yytext,match:this.match,matches:this.matches,matched:this.matched,yyleng:this.yyleng,offset:this.offset,_more:this._more,_input:this._input,yy:this.yy,conditionStack:this.conditionStack.slice(0),done:this.done},this.options.ranges&&(i.yylloc.range=this.yylloc.range.slice(0))),n=t[0].match(/(?:\r\n?|\n).*/g),n&&(this.yylineno+=n.length),this.yylloc={first_line:this.yylloc.last_line,last_line:this.yylineno+1,first_column:this.yylloc.last_column,last_column:n?n[n.length-1].length-n[n.length-1].match(/\r?\n?/)[0].length:this.yylloc.last_column+t[0].length},this.yytext+=t[0],this.match+=t[0],this.matches=t,this.yyleng=this.yytext.length,this.options.ranges&&(this.yylloc.range=[this.offset,this.offset+=this.yyleng]),this._more=!1,this._backtrack=!1,this._input=this._input.slice(t[0].length),this.matched+=t[0],r=this.performAction.call(this,this.yy,this,e,this.conditionStack[this.conditionStack.length-1]),this.done&&this._input&&(this.done=!1),r)return r;if(this._backtrack){for(var a in i)this[a]=i[a];return!1}return!1},next:function(){if(this.done)return this.EOF;this._input||(this.done=!0);var t,e,r,n;this._more||(this.yytext="",this.match="");for(var i=this._currentRules(),a=0;a<i.length;a++)if(r=this._input.match(this.rules[i[a]]),r&&(!e||r[0].length>e[0].length)){if(e=r,n=a,this.options.backtrack_lexer){if(t=this.test_match(r,i[a]),t!==!1)return t;if(this._backtrack){e=!1;continue}return!1}if(!this.options.flex)break}return e?(t=this.test_match(e,i[n]),t!==!1?t:!1):""===this._input?this.EOF:this.parseError("Lexical error on line "+(this.yylineno+1)+". Unrecognized text.\n"+this.showPosition(),{text:"",token:null,line:this.yylineno})},lex:function(){var t=this.next();return t?t:this.lex()},begin:function(t){this.conditionStack.push(t)},popState:function(){var t=this.conditionStack.length-1;return t>0?this.conditionStack.pop():this.conditionStack[0]},_currentRules:function(){return this.conditionStack.length&&this.conditionStack[this.conditionStack.length-1]?this.conditions[this.conditionStack[this.conditionStack.length-1]].rules:this.conditions.INITIAL.rules},topState:function(t){return t=this.conditionStack.length-1-Math.abs(t||0),t>=0?this.conditionStack[t]:"INITIAL"},pushState:function(t){this.begin(t)},stateStackSize:function(){return this.conditionStack.length},options:{},performAction:function(t,e,r,n){switch(r){case 0:break;case 1:return 6;case 2:break;case 3:return 5;case 4:return this.begin("struct"),17;case 5:return this.popState(),19;case 6:break;case 7:return"MEMBER";case 8:return 16;case 9:this.begin("string");break;case 10:this.popState();break;case 11:return"STR";case 12:return 27;case 13:return 27;case 14:return 29;case 15:return 29;case 16:return 28;case 17:return 26;case 18:return 30;case 19:return 31;case 20:return 13;case 21:return 43;case 22:return"DOT";case 23:return"PLUS";case 24:return 40;case 25:return"EQUALS";case 26:return"EQUALS";case 27:return 47;case 28:return"PUNCTUATION";case 29:return 46;case 30:return 45;case 31:return 42;case 32:return 8}},rules:[/^(?:%%[^\n]*)/,/^(?:\n+)/,/^(?:\s+)/,/^(?:classDiagram\b)/,/^(?:[\{])/,/^(?:\})/,/^(?:[\n])/,/^(?:[^\{\}\n]*)/,/^(?:class\b)/,/^(?:["])/,/^(?:["])/,/^(?:[^"]*)/,/^(?:\s*<\|)/,/^(?:\s*\|>)/,/^(?:\s*>)/,/^(?:\s*<)/,/^(?:\s*\*)/,/^(?:\s*o\b)/,/^(?:--)/,/^(?:\.\.)/,/^(?::[^#\n;]+)/,/^(?:-)/,/^(?:\.)/,/^(?:\+)/,/^(?:%)/,/^(?:=)/,/^(?:=)/,/^(?:[A-Za-z]+)/,/^(?:[!"#$%&'*+,-.`?\\_\/])/,/^(?:[0-9]+)/,/^(?:[\u00AA\u00B5\u00BA\u00C0-\u00D6\u00D8-\u00F6]|[\u00F8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377]|[\u037A-\u037D\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5]|[\u03F7-\u0481\u048A-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA]|[\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE]|[\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA]|[\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0]|[\u08A2-\u08AC\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0977]|[\u0979-\u097F\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2]|[\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A]|[\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39]|[\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8]|[\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0B05-\u0B0C]|[\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C]|[\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99]|[\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0]|[\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C33\u0C35-\u0C39\u0C3D]|[\u0C58\u0C59\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3]|[\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10]|[\u0D12-\u0D3A\u0D3D\u0D4E\u0D60\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1]|[\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81]|[\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3]|[\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6]|[\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A]|[\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081]|[\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D]|[\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0]|[\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310]|[\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F4\u1401-\u166C]|[\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u1700-\u170C\u170E-\u1711]|[\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7]|[\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191C]|[\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19C1-\u19C7\u1A00-\u1A16]|[\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF]|[\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC]|[\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D]|[\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D]|[\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3]|[\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F]|[\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128]|[\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2183\u2184]|[\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3]|[\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6]|[\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE]|[\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005\u3006\u3031-\u3035\u303B\u303C]|[\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D]|[\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC]|[\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B]|[\uA640-\uA66E\uA67F-\uA697\uA6A0-\uA6E5\uA717-\uA71F\uA722-\uA788]|[\uA78B-\uA78E\uA790-\uA793\uA7A0-\uA7AA\uA7F8-\uA801\uA803-\uA805]|[\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB]|[\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uAA00-\uAA28]|[\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA80-\uAAAF\uAAB1\uAAB5]|[\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4]|[\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E]|[\uABC0-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D]|[\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36]|[\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D]|[\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC]|[\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF]|[\uFFD2-\uFFD7\uFFDA-\uFFDC])/,/^(?:\s)/,/^(?:$)/],conditions:{string:{rules:[10,11],inclusive:!1},struct:{rules:[5,6,7],inclusive:!1},INITIAL:{rules:[0,1,2,3,4,8,9,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32],inclusive:!0}}};return t}();return w.lexer=x,t.prototype=w,w.Parser=t,new t}();"undefined"!=typeof t&&"undefined"!=typeof r&&(r.parser=i,r.Parser=i.Parser,r.parse=function(){return i.parse.apply(i,arguments)},r.main=function(e){e[1]||(console.log("Usage: "+e[0]+" FILE"),n.exit(1));var i=t("fs").readFileSync(t("path").normalize(e[1]),"utf8");return r.parser.parse(i)},"undefined"!=typeof e&&t.main===e&&r.main(n.argv.slice(1)))}).call(this,t("_process"))},{_process:3,fs:1,path:2}],111:[function(t,e,r){(function(e){"use strict";var n=t("../../logger"),i=new n.Log,a="",s=!1;r.setMessage=function(t){i.debug("Setting message to: "+t),a=t},r.getMessage=function(){return a},r.setInfo=function(t){s=t},r.getInfo=function(){return s},r.parseError=function(t,r){e.mermaidAPI.parseError(t,r)}}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{"../../logger":126}],112:[function(t,e,r){"use strict";var n=t("./exampleDb"),i=t("./parser/example.js"),a=t("../../d3"),s=t("../../logger"),o=new s.Log;r.draw=function(t,e,r){var s;s=i.parser,s.yy=n,o.debug("Renering example diagram"),s.parse(t);var u=a.select("#"+e),c=u.append("g");c.append("text").attr("x",100).attr("y",40).attr("class","version").attr("font-size","32px").style("text-anchor","middle").text("mermaid "+r),u.attr("height",100),u.attr("width",400)}},{"../../d3":107,"../../logger":126,"./exampleDb":111,"./parser/example.js":113}],113:[function(t,e,r){(function(n){"use strict";var i=function(){function t(){this.yy={}}var e=function(t,e,r,n){for(r=r||{},n=t.length;n--;r[t[n]]=e);return r},r=[6,9,10,12],n={trace:function(){},yy:{},symbols_:{error:2,start:3,info:4,document:5,EOF:6,line:7,statement:8,NL:9,showInfo:10,message:11,say:12,TXT:13,$accept:0,$end:1},terminals_:{2:"error",4:"info",6:"EOF",9:"NL",10:"showInfo",12:"say",13:"TXT"},productions_:[0,[3,3],[5,0],[5,2],[7,1],[7,1],[8,1],[8,1],[11,2]],performAction:function(t,e,r,n,i,a,s){var o=a.length-1;switch(i){case 1:return n;case 4:break;case 6:n.setInfo(!0);break;case 7:n.setMessage(a[o]);break;case 8:this.$=a[o-1].substring(1).trim().replace(/\\n/gm,"\n")}},table:[{3:1,4:[1,2]},{1:[3]},e(r,[2,2],{5:3}),{6:[1,4],7:5,8:6,9:[1,7],10:[1,8],11:9,12:[1,10]},{1:[2,1]},e(r,[2,3]),e(r,[2,4]),e(r,[2,5]),e(r,[2,6]),e(r,[2,7]),{13:[1,11]},e(r,[2,8])],defaultActions:{4:[2,1]},parseError:function(t,e){if(!e.recoverable){var r=function(t,e){this.message=t,this.hash=e};throw r.prototype=new Error,new r(t,e)}this.trace(t)},parse:function(t){var e=this,r=[0],n=[null],i=[],a=this.table,s="",o=0,u=0,c=0,l=2,h=1,d=i.slice.call(arguments,1),f=Object.create(this.lexer),p={yy:{}};for(var g in this.yy)Object.prototype.hasOwnProperty.call(this.yy,g)&&(p.yy[g]=this.yy[g]);f.setInput(t,p.yy),p.yy.lexer=f,p.yy.parser=this,"undefined"==typeof f.yylloc&&(f.yylloc={});var m=f.yylloc;i.push(m);var y=f.options&&f.options.ranges;"function"==typeof p.yy.parseError?this.parseError=p.yy.parseError:this.parseError=Object.getPrototypeOf(this).parseError;for(var v,b,_,A,w,x,E,k,D,C=function(){var t;return t=f.lex()||h,"number"!=typeof t&&(t=e.symbols_[t]||t),t},F={};;){if(_=r[r.length-1],this.defaultActions[_]?A=this.defaultActions[_]:((null===v||"undefined"==typeof v)&&(v=C()),A=a[_]&&a[_][v]),"undefined"==typeof A||!A.length||!A[0]){var T="";D=[];for(x in a[_])this.terminals_[x]&&x>l&&D.push("'"+this.terminals_[x]+"'");T=f.showPosition?"Parse error on line "+(o+1)+":\n"+f.showPosition()+"\nExpecting "+D.join(", ")+", got 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e=t.length,r=t.split(/(?:\r\n?|\n)/g);this._input=t+this._input,this.yytext=this.yytext.substr(0,this.yytext.length-e),this.offset-=e;var n=this.match.split(/(?:\r\n?|\n)/g);this.match=this.match.substr(0,this.match.length-1),this.matched=this.matched.substr(0,this.matched.length-1),r.length-1&&(this.yylineno-=r.length-1);var i=this.yylloc.range;return this.yylloc={first_line:this.yylloc.first_line,last_line:this.yylineno+1,first_column:this.yylloc.first_column,last_column:r?(r.length===n.length?this.yylloc.first_column:0)+n[n.length-r.length].length-r[0].length:this.yylloc.first_column-e},this.options.ranges&&(this.yylloc.range=[i[0],i[0]+this.yyleng-e]),this.yyleng=this.yytext.length,this},more:function(){return this._more=!0,this},reject:function(){return this.options.backtrack_lexer?(this._backtrack=!0,this):this.parseError("Lexical error on line "+(this.yylineno+1)+". 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Unrecognized text.\n"+this.showPosition(),{text:"",token:null,line:this.yylineno})},lex:function(){var t=this.next();return t?t:this.lex()},begin:function(t){this.conditionStack.push(t)},popState:function(){var t=this.conditionStack.length-1;return t>0?this.conditionStack.pop():this.conditionStack[0]},_currentRules:function(){return this.conditionStack.length&&this.conditionStack[this.conditionStack.length-1]?this.conditions[this.conditionStack[this.conditionStack.length-1]].rules:this.conditions.INITIAL.rules},topState:function(t){return t=this.conditionStack.length-1-Math.abs(t||0),t>=0?this.conditionStack[t]:"INITIAL"},pushState:function(t){this.begin(t)},stateStackSize:function(){return this.conditionStack.length},options:{"case-insensitive":!0},performAction:function(t,e,r,n){switch(r){case 0:return 9;case 1:return 10;case 2:return 4;case 3:return 12;case 4:return 13;case 5:return 6;case 6:return"INVALID"}},rules:[/^(?:[\n]+)/i,/^(?:showInfo\b)/i,/^(?:info\b)/i,/^(?:say\b)/i,/^(?::[^#\n;]+)/i,/^(?:$)/i,/^(?:.)/i],conditions:{INITIAL:{rules:[0,1,2,3,4,5,6],inclusive:!0}}};return t}();return n.lexer=i,t.prototype=n,n.Parser=t,new t}();"undefined"!=typeof t&&"undefined"!=typeof r&&(r.parser=i,r.Parser=i.Parser,r.parse=function(){return i.parse.apply(i,arguments)},r.main=function(e){e[1]||(console.log("Usage: "+e[0]+" FILE"),n.exit(1));var i=t("fs").readFileSync(t("path").normalize(e[1]),"utf8");return r.parser.parse(i)},"undefined"!=typeof e&&t.main===e&&r.main(n.argv.slice(1)))}).call(this,t("_process"))},{_process:3,fs:1,path:2}],114:[function(t,e,r){"use strict";var n,i=t("../../logger"),a=new i.Log;if(t)try{n=t("dagre-d3")}catch(s){a.debug("Could not load dagre-d3")}n||(n=window.dagreD3),e.exports=n},{"../../logger":126,"dagre-d3":4}],115:[function(t,e,r){"use strict";var n=t("./graphDb"),i=t("./parser/flow"),a=t("./parser/dot"),s=t("../../d3"),o=t("./dagre-d3"),u=t("../../logger"),c=new u.Log,l={};e.exports.setConf=function(t){var e,r=Object.keys(t);for(e=0;e<r.length;e++)l[r[e]]=t[r[e]]},r.addVertices=function(t,e){var r=Object.keys(t),n=function(t,e){var r;for(r=0;r<e.length;r++)"undefined"!=typeof e[r]&&(t=t+e[r]+";");return t};r.forEach(function(r){var i,a=t[r],s="";a.classes.length>0&&(s=a.classes.join(" "));var o="";o=n(o,a.styles),i="undefined"==typeof a.text?a.id:a.text;var u="";l.htmlLabels?(u="html",i=i.replace(/fa:fa[\w\-]+/g,function(t){return'<i class="fa '+t.substring(3)+'"></i>'})):(i=i.replace(/<br>/g,"\n"),u="text");var c=0,h="";switch(a.type){case"round":c=5,h="rect";break;case"square":h="rect";break;case"diamond":h="question";break;case"odd":h="rect_left_inv_arrow";break;case"odd_right":h="rect_left_inv_arrow";break;case"circle":h="circle";break;case"ellipse":h="ellipse";break;case"group":h="rect",i="";break;default:h="rect"}e.setNode(a.id,{labelType:u,shape:h,label:i,rx:c,ry:c,"class":s,style:o,id:a.id})})},r.addEdges=function(t,e){var r,n,i=0;"undefined"!=typeof t.defaultStyle&&(n=t.defaultStyle.toString().replace(/,/g,";")),t.forEach(function(t){i++,r="arrow_open"===t.type?"none":"normal";var a="";if("undefined"!=typeof t.style)t.style.forEach(function(t){a=a+t+";"});else switch(t.stroke){case"normal":a="fill:none","undefined"!=typeof n&&(a=n);break;case"dotted":a="stroke: #333; fill:none;stroke-width:2px;stroke-dasharray:3;";break;case"thick":a="stroke: #333; stroke-width: 3.5px;fill:none"}if("undefined"==typeof t.text)"undefined"==typeof t.style?e.setEdge(t.start,t.end,{style:a,arrowhead:r},i):e.setEdge(t.start,t.end,{style:a,arrowheadStyle:"fill: #333",arrowhead:r},i);else{var s=t.text.replace(/<br>/g,"\n");"undefined"==typeof t.style?l.htmlLabels?e.setEdge(t.start,t.end,{labelType:"html",style:a,labelpos:"c",label:'<span class="edgeLabel">'+t.text+"</span>",arrowheadStyle:"fill: #333",arrowhead:r},i):e.setEdge(t.start,t.end,{labelType:"text",style:"stroke: #333; stroke-width: 1.5px;fill:none",labelpos:"c",label:s,arrowheadStyle:"fill: #333",arrowhead:r},i):e.setEdge(t.start,t.end,{labelType:"text",style:a,arrowheadStyle:"fill: #333",label:s,arrowhead:r},i)}})},r.getClasses=function(t,e){var r;n.clear(),r=e?a.parser:i.parser,r.yy=n,r.parse(t);var s=n.getClasses();return"undefined"==typeof s["default"]&&(s["default"]={id:"default"},s["default"].styles=[],s["default"].clusterStyles=["rx:4px","fill: rgb(255, 255, 222)","rx: 4px","stroke: rgb(170, 170, 51)","stroke-width: 1px"],s["default"].nodeLabelStyles=["fill:#000","stroke:none","font-weight:300",'font-family:"Helvetica Neue",Helvetica,Arial,sans-serf',"font-size:14px"],s["default"].edgeLabelStyles=["fill:#000","stroke:none","font-weight:300",'font-family:"Helvetica Neue",Helvetica,Arial,sans-serf',"font-size:14px"]),
+s},r.draw=function(t,e,u){c.debug("Drawing flowchart");var h;n.clear(),h=u?a.parser:i.parser,h.yy=n;try{h.parse(t)}catch(d){c.debug("Parsing failed")}var f;f=n.getDirection(),"undefined"==typeof f&&(f="TD");var p,g=new o.graphlib.Graph({multigraph:!0,compound:!0}).setGraph({rankdir:f,marginx:20,marginy:20}).setDefaultEdgeLabel(function(){return{}}),m=n.getSubGraphs(),y=0;for(y=m.length-1;y>=0;y--)p=m[y],n.addVertex(p.id,p.title,"group",void 0);var v=n.getVertices(),b=n.getEdges();y=0;var _;for(y=m.length-1;y>=0;y--)for(p=m[y],s.selectAll("cluster").append("text"),_=0;_<p.nodes.length;_++)g.setParent(p.nodes[_],p.id);r.addVertices(v,g),r.addEdges(b,g);var A=new o.render;A.shapes().question=function(t,e,r){var n=e.width,i=e.height,a=.8*(n+i),s=[{x:a/2,y:0},{x:a,y:-a/2},{x:a/2,y:-a},{x:0,y:-a/2}],u=t.insert("polygon",":first-child").attr("points",s.map(function(t){return t.x+","+t.y}).join(" ")).attr("rx",5).attr("ry",5).attr("transform","translate("+-a/2+","+2*a/4+")");return r.intersect=function(t){return o.intersect.polygon(r,s,t)},u},A.shapes().rect_left_inv_arrow=function(t,e,r){var n=e.width,i=e.height,a=[{x:-i/2,y:0},{x:n,y:0},{x:n,y:-i},{x:-i/2,y:-i},{x:0,y:-i/2}],s=t.insert("polygon",":first-child").attr("points",a.map(function(t){return t.x+","+t.y}).join(" ")).attr("transform","translate("+-n/2+","+2*i/4+")");return r.intersect=function(t){return o.intersect.polygon(r,a,t)},s},A.shapes().rect_right_inv_arrow=function(t,e,r){var n=e.width,i=e.height,a=[{x:0,y:0},{x:n+i/2,y:0},{x:n,y:-i/2},{x:n+i/2,y:-i},{x:0,y:-i}],s=t.insert("polygon",":first-child").attr("points",a.map(function(t){return t.x+","+t.y}).join(" ")).attr("transform","translate("+-n/2+","+2*i/4+")");return r.intersect=function(t){return o.intersect.polygon(r,a,t)},s},A.arrows().none=function(t,e,r,n){var i=t.append("marker").attr("id",e).attr("viewBox","0 0 10 10").attr("refX",9).attr("refY",5).attr("markerUnits","strokeWidth").attr("markerWidth",8).attr("markerHeight",6).attr("orient","auto"),a=i.append("path").attr("d","M 0 0 L 0 0 L 0 0 z");o.util.applyStyle(a,r[n+"Style"])};var w=s.select("#"+e),x=s.select("#"+e+" g");for(A(x,g),x.selectAll("g.node").attr("title",function(){return n.getTooltip(this.id)}),l.useMaxWidth?(w.attr("height","100%"),w.attr("width",l.width),w.attr("viewBox","0 0 "+(g.graph().width+20)+" "+(g.graph().height+20)),w.attr("style","max-width:"+(g.graph().width+20)+"px;")):(w.attr("height",g.graph().height),"undefined"==typeof l.width?w.attr("width",g.graph().width):w.attr("width",l.width),w.attr("viewBox","0 0 "+(g.graph().width+20)+" "+(g.graph().height+20))),n.indexNodes("subGraph"+y),y=0;y<m.length;y++)if(p=m[y],"undefined"!==p.title){var E=document.querySelectorAll("#"+e+" #"+p.id+" rect"),k=document.querySelectorAll("#"+e+" #"+p.id),D=E[0].x.baseVal.value,C=E[0].y.baseVal.value,F=E[0].width.baseVal.value,T=s.select(k[0]),S=T.append("text");S.attr("x",D+F/2),S.attr("y",C+14),S.attr("fill","black"),S.attr("stroke","none"),S.attr("id",e+"Text"),S.style("text-anchor","middle"),"undefined"==typeof p.title?S.text("Undef"):S.text(p.title)}}},{"../../d3":107,"../../logger":126,"./dagre-d3":114,"./graphDb":116,"./parser/dot":117,"./parser/flow":118}],116:[function(require,module,exports){(function(global){"use strict";var Logger=require("../../logger"),log=new Logger.Log,d3=require("../../d3"),vertices={},edges=[],classes=[],subGraphs=[],tooltips={},subCount=0,direction,funs=[];exports.addVertex=function(t,e,r,n){var i;"undefined"!=typeof t&&0!==t.trim().length&&("undefined"==typeof vertices[t]&&(vertices[t]={id:t,styles:[],classes:[]}),"undefined"!=typeof e&&(i=e.trim(),'"'===i[0]&&'"'===i[i.length-1]&&(i=i.substring(1,i.length-1)),vertices[t].text=i),"undefined"!=typeof r&&(vertices[t].type=r),"undefined"!=typeof r&&(vertices[t].type=r),"undefined"!=typeof n&&null!==n&&n.forEach(function(e){vertices[t].styles.push(e)}))},exports.addLink=function(t,e,r,n){log.debug("Got edge",t,e);var i={start:t,end:e,type:void 0,text:""};n=r.text,"undefined"!=typeof n&&(i.text=n.trim(),'"'===i.text[0]&&'"'===i.text[i.text.length-1]&&(i.text=i.text.substring(1,i.text.length-1))),"undefined"!=typeof r&&(i.type=r.type,i.stroke=r.stroke),edges.push(i)},exports.updateLink=function(t,e){"default"===t?edges.defaultStyle=e:edges[t].style=e},exports.addClass=function(t,e){"undefined"==typeof classes[t]&&(classes[t]={id:t,styles:[]}),"undefined"!=typeof e&&null!==e&&e.forEach(function(e){classes[t].styles.push(e)})},exports.setDirection=function(t){direction=t},exports.setClass=function(t,e){t.indexOf(",")>0?t.split(",").forEach(function(t){"undefined"!=typeof vertices[t]&&vertices[t].classes.push(e)}):"undefined"!=typeof vertices[t]&&vertices[t].classes.push(e)};var setTooltip=function(t,e){"undefined"!=typeof e&&(tooltips[t]=e)},setClickFun=function setClickFun(id,functionName){"undefined"!=typeof functionName&&"undefined"!=typeof vertices[id]&&funs.push(function(element){var elem=d3.select(element).select("#"+id);null!==elem&&elem.on("click",function(){eval(functionName+"('"+id+"')")})})},setLink=function(t,e){"undefined"!=typeof e&&"undefined"!=typeof vertices[t]&&funs.push(function(r){var n=d3.select(r).select("#"+t);null!==n&&n.on("click",function(){window.open(e,"newTab")})})};exports.getTooltip=function(t){return tooltips[t]},exports.setClickEvent=function(t,e,r,n){t.indexOf(",")>0?t.split(",").forEach(function(t){setTooltip(t,n),setClickFun(t,e),setLink(t,r)}):(setTooltip(t,n),setClickFun(t,e),setLink(t,r))},exports.bindFunctions=function(t){funs.forEach(function(e){e(t)})},exports.getDirection=function(){return direction},exports.getVertices=function(){return vertices},exports.getEdges=function(){return 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this.yy=e||this.yy||{},this._input=t,this._more=this._backtrack=this.done=!1,this.yylineno=this.yyleng=0,this.yytext=this.matched=this.match="",this.conditionStack=["INITIAL"],this.yylloc={first_line:1,first_column:0,last_line:1,last_column:0},this.options.ranges&&(this.yylloc.range=[0,0]),this.offset=0,this},input:function(){var t=this._input[0];this.yytext+=t,this.yyleng++,this.offset++,this.match+=t,this.matched+=t;var e=t.match(/(?:\r\n?|\n).*/g);return e?(this.yylineno++,this.yylloc.last_line++):this.yylloc.last_column++,this.options.ranges&&this.yylloc.range[1]++,this._input=this._input.slice(1),t},unput:function(t){var e=t.length,r=t.split(/(?:\r\n?|\n)/g);this._input=t+this._input,this.yytext=this.yytext.substr(0,this.yytext.length-e),this.offset-=e;var n=this.match.split(/(?:\r\n?|\n)/g);this.match=this.match.substr(0,this.match.length-1),this.matched=this.matched.substr(0,this.matched.length-1),r.length-1&&(this.yylineno-=r.length-1);var i=this.yylloc.range;return this.yylloc={first_line:this.yylloc.first_line,last_line:this.yylineno+1,first_column:this.yylloc.first_column,last_column:r?(r.length===n.length?this.yylloc.first_column:0)+n[n.length-r.length].length-r[0].length:this.yylloc.first_column-e},this.options.ranges&&(this.yylloc.range=[i[0],i[0]+this.yyleng-e]),this.yyleng=this.yytext.length,this},more:function(){return this._more=!0,this},reject:function(){return this.options.backtrack_lexer?(this._backtrack=!0,this):this.parseError("Lexical error on line "+(this.yylineno+1)+". You can only invoke reject() in the lexer when the lexer is of the backtracking persuasion (options.backtrack_lexer = true).\n"+this.showPosition(),{text:"",token:null,line:this.yylineno})},less:function(t){this.unput(this.match.slice(t))},pastInput:function(){var t=this.matched.substr(0,this.matched.length-this.match.length);return(t.length>20?"...":"")+t.substr(-20).replace(/\n/g,"")},upcomingInput:function(){var t=this.match;return t.length<20&&(t+=this._input.substr(0,20-t.length)),(t.substr(0,20)+(t.length>20?"...":"")).replace(/\n/g,"")},showPosition:function(){var t=this.pastInput(),e=new Array(t.length+1).join("-");return t+this.upcomingInput()+"\n"+e+"^"},test_match:function(t,e){var r,n,i;if(this.options.backtrack_lexer&&(i={yylineno:this.yylineno,yylloc:{first_line:this.yylloc.first_line,last_line:this.last_line,first_column:this.yylloc.first_column,last_column:this.yylloc.last_column},yytext:this.yytext,match:this.match,matches:this.matches,matched:this.matched,yyleng:this.yyleng,offset:this.offset,_more:this._more,_input:this._input,yy:this.yy,conditionStack:this.conditionStack.slice(0),done:this.done},this.options.ranges&&(i.yylloc.range=this.yylloc.range.slice(0))),n=t[0].match(/(?:\r\n?|\n).*/g),n&&(this.yylineno+=n.length),this.yylloc={first_line:this.yylloc.last_line,last_line:this.yylineno+1,first_column:this.yylloc.last_column,last_column:n?n[n.length-1].length-n[n.length-1].match(/\r?\n?/)[0].length:this.yylloc.last_column+t[0].length},this.yytext+=t[0],this.match+=t[0],this.matches=t,this.yyleng=this.yytext.length,this.options.ranges&&(this.yylloc.range=[this.offset,this.offset+=this.yyleng]),this._more=!1,this._backtrack=!1,this._input=this._input.slice(t[0].length),this.matched+=t[0],r=this.performAction.call(this,this.yy,this,e,this.conditionStack[this.conditionStack.length-1]),this.done&&this._input&&(this.done=!1),r)return r;if(this._backtrack){for(var a in i)this[a]=i[a];return!1}return!1},next:function(){if(this.done)return this.EOF;this._input||(this.done=!0);var t,e,r,n;this._more||(this.yytext="",this.match="");for(var i=this._currentRules(),a=0;a<i.length;a++)if(r=this._input.match(this.rules[i[a]]),r&&(!e||r[0].length>e[0].length)){if(e=r,n=a,this.options.backtrack_lexer){if(t=this.test_match(r,i[a]),t!==!1)return t;if(this._backtrack){e=!1;continue}return!1}if(!this.options.flex)break}return e?(t=this.test_match(e,i[n]),t!==!1?t:!1):""===this._input?this.EOF:this.parseError("Lexical error on line "+(this.yylineno+1)+". Unrecognized text.\n"+this.showPosition(),{text:"",token:null,line:this.yylineno})},lex:function(){var t=this.next();return t?t:this.lex()},begin:function(t){this.conditionStack.push(t)},popState:function(){var t=this.conditionStack.length-1;return t>0?this.conditionStack.pop():this.conditionStack[0]},_currentRules:function(){return this.conditionStack.length&&this.conditionStack[this.conditionStack.length-1]?this.conditions[this.conditionStack[this.conditionStack.length-1]].rules:this.conditions.INITIAL.rules},topState:function(t){return t=this.conditionStack.length-1-Math.abs(t||0),t>=0?this.conditionStack[t]:"INITIAL"},pushState:function(t){this.begin(t)},stateStackSize:function(){return this.conditionStack.length},options:{},performAction:function(t,e,r,n){switch(r){case 0:return"STYLE";case 1:return"LINKSTYLE";case 2:return"CLASSDEF";case 3:return"CLASS";case 4:return"CLICK";case 5:return 12;case 6:return 13;case 7:return 47;case 8:return 35;case 9:return 36;case 10:return"DIR";case 11:return"DIR";case 12:return"DIR";case 13:return"DIR";case 14:return"DIR";case 15:return"DIR";case 16:return 17;case 17:return 23;case 18:return 18;case 19:return 28;case 20:return 40;case 21:return 32;case 22:return 21;case 23:return 22;case 24:return"ARROW_CROSS";case 25:return 57;case 26:return"ARROW_CIRCLE";case 27:return 58;case 28:return 25;case 29:return 19;case 30:return 20;case 31:return 16;case 32:return"PIPE";case 33:return"PS";case 34:return"PE";case 35:return 37;case 36:return 39;case 37:return 8;case 38:return 10;case 39:return"QUOTE";case 40:return 24;case 41:return"NEWLINE";case 42:return 5}},rules:[/^(?:style\b)/,/^(?:linkStyle\b)/,/^(?:classDef\b)/,/^(?:class\b)/,/^(?:click\b)/,/^(?:graph\b)/,/^(?:digraph\b)/,/^(?:subgraph\b)/,/^(?:node\b)/,/^(?:edge\b)/,/^(?:LR\b)/,/^(?:RL\b)/,/^(?:TB\b)/,/^(?:BT\b)/,/^(?:TD\b)/,/^(?:BR\b)/,/^(?:[0-9])/,/^(?:#)/,/^(?::)/,/^(?:;)/,/^(?:,)/,/^(?:=)/,/^(?:\*)/,/^(?:\.)/,/^(?:--[x])/,/^(?:->)/,/^(?:--[o])/,/^(?:--)/,/^(?:-)/,/^(?:\+)/,/^(?:=)/,/^(?:[\u0021-\u0027\u002A-\u002E\u003F\u0041-\u005A\u0061-\u007A\u00AA\u00B5\u00BA\u00C0-\u00D6\u00D8-\u00F6]|[\u00F8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377]|[\u037A-\u037D\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5]|[\u03F7-\u0481\u048A-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA]|[\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE]|[\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA]|[\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0]|[\u08A2-\u08AC\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0977]|[\u0979-\u097F\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2]|[\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A]|[\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39]|[\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8]|[\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0B05-\u0B0C]|[\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C]|[\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99]|[\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0]|[\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C33\u0C35-\u0C39\u0C3D]|[\u0C58\u0C59\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3]|[\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10]|[\u0D12-\u0D3A\u0D3D\u0D4E\u0D60\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1]|[\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81]|[\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3]|[\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6]|[\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A]|[\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081]|[\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D]|[\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0]|[\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310]|[\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F4\u1401-\u166C]|[\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u1700-\u170C\u170E-\u1711]|[\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7]|[\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191C]|[\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19C1-\u19C7\u1A00-\u1A16]|[\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF]|[\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC]|[\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D]|[\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D]|[\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3]|[\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F]|[\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128]|[\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2183\u2184]|[\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3]|[\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6]|[\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE]|[\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005\u3006\u3031-\u3035\u303B\u303C]|[\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D]|[\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC]|[\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B]|[\uA640-\uA66E\uA67F-\uA697\uA6A0-\uA6E5\uA717-\uA71F\uA722-\uA788]|[\uA78B-\uA78E\uA790-\uA793\uA7A0-\uA7AA\uA7F8-\uA801\uA803-\uA805]|[\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB]|[\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uAA00-\uAA28]|[\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA80-\uAAAF\uAAB1\uAAB5]|[\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4]|[\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E]|[\uABC0-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D]|[\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36]|[\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D]|[\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC]|[\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF]|[\uFFD2-\uFFD7\uFFDA-\uFFDC_])/,/^(?:\|)/,/^(?:\()/,/^(?:\))/,/^(?:\[)/,/^(?:\])/,/^(?:\{)/,/^(?:\})/,/^(?:")/,/^(?:\s)/,/^(?:\n)/,/^(?:$)/],conditions:{INITIAL:{rules:[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,1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a[_])this.terminals_[x]&&x>l&&D.push("'"+this.terminals_[x]+"'");T=f.showPosition?"Parse error on line "+(o+1)+":\n"+f.showPosition()+"\nExpecting "+D.join(", ")+", got '"+(this.terminals_[v]||v)+"'":"Parse error on line "+(o+1)+": Unexpected "+(v==h?"end of input":"'"+(this.terminals_[v]||v)+"'"),this.parseError(T,{text:f.match,token:this.terminals_[v]||v,line:f.yylineno,loc:m,expected:D})}if(A[0]instanceof Array&&A.length>1)throw new Error("Parse Error: multiple actions possible at state: "+_+", token: "+v);switch(A[0]){case 1:r.push(v),n.push(f.yytext),i.push(f.yylloc),r.push(A[1]),v=null,b?(v=b,b=null):(u=f.yyleng,s=f.yytext,o=f.yylineno,m=f.yylloc,c>0&&c--);break;case 2:if(E=this.productions_[A[1]][1],F.$=n[n.length-E],F._$={first_line:i[i.length-(E||1)].first_line,last_line:i[i.length-1].last_line,first_column:i[i.length-(E||1)].first_column,last_column:i[i.length-1].last_column},y&&(F._$.range=[i[i.length-(E||1)].range[0],i[i.length-1].range[1]]),w=this.performAction.apply(F,[s,u,o,p.yy,A[1],n,i].concat(d)),"undefined"!=typeof w)return w;E&&(r=r.slice(0,-1*E*2),n=n.slice(0,-1*E),i=i.slice(0,-1*E)),r.push(this.productions_[A[1]][0]),n.push(F.$),i.push(F._$),k=a[r[r.length-2]][r[r.length-1]],r.push(k);break;case 3:return!0}}return!0}},Ct=function(){var t={EOF:1,parseError:function(t,e){if(!this.yy.parser)throw new Error(t);this.yy.parser.parseError(t,e)},setInput:function(t,e){return this.yy=e||this.yy||{},this._input=t,this._more=this._backtrack=this.done=!1,this.yylineno=this.yyleng=0,this.yytext=this.matched=this.match="",this.conditionStack=["INITIAL"],this.yylloc={first_line:1,first_column:0,last_line:1,last_column:0},this.options.ranges&&(this.yylloc.range=[0,0]),this.offset=0,this},input:function(){var t=this._input[0];this.yytext+=t,this.yyleng++,this.offset++,this.match+=t,this.matched+=t;var e=t.match(/(?:\r\n?|\n).*/g);return e?(this.yylineno++,this.yylloc.last_line++):this.yylloc.last_column++,this.options.ranges&&this.yylloc.range[1]++,this._input=this._input.slice(1),t},unput:function(t){var e=t.length,r=t.split(/(?:\r\n?|\n)/g);this._input=t+this._input,this.yytext=this.yytext.substr(0,this.yytext.length-e),this.offset-=e;var n=this.match.split(/(?:\r\n?|\n)/g);this.match=this.match.substr(0,this.match.length-1),this.matched=this.matched.substr(0,this.matched.length-1),r.length-1&&(this.yylineno-=r.length-1);var i=this.yylloc.range;return this.yylloc={first_line:this.yylloc.first_line,last_line:this.yylineno+1,first_column:this.yylloc.first_column,last_column:r?(r.length===n.length?this.yylloc.first_column:0)+n[n.length-r.length].length-r[0].length:this.yylloc.first_column-e},this.options.ranges&&(this.yylloc.range=[i[0],i[0]+this.yyleng-e]),this.yyleng=this.yytext.length,this},more:function(){return this._more=!0,this},reject:function(){return this.options.backtrack_lexer?(this._backtrack=!0,this):this.parseError("Lexical error on line "+(this.yylineno+1)+". You can only invoke reject() in the lexer when the lexer is of the backtracking persuasion (options.backtrack_lexer = true).\n"+this.showPosition(),{text:"",token:null,line:this.yylineno})},less:function(t){this.unput(this.match.slice(t))},pastInput:function(){var t=this.matched.substr(0,this.matched.length-this.match.length);return(t.length>20?"...":"")+t.substr(-20).replace(/\n/g,"")},upcomingInput:function(){var t=this.match;return t.length<20&&(t+=this._input.substr(0,20-t.length)),(t.substr(0,20)+(t.length>20?"...":"")).replace(/\n/g,"")},showPosition:function(){var t=this.pastInput(),e=new Array(t.length+1).join("-");return t+this.upcomingInput()+"\n"+e+"^"},test_match:function(t,e){var r,n,i;if(this.options.backtrack_lexer&&(i={yylineno:this.yylineno,yylloc:{first_line:this.yylloc.first_line,last_line:this.last_line,first_column:this.yylloc.first_column,last_column:this.yylloc.last_column},yytext:this.yytext,match:this.match,matches:this.matches,matched:this.matched,yyleng:this.yyleng,offset:this.offset,_more:this._more,_input:this._input,yy:this.yy,conditionStack:this.conditionStack.slice(0),done:this.done},this.options.ranges&&(i.yylloc.range=this.yylloc.range.slice(0))),n=t[0].match(/(?:\r\n?|\n).*/g),n&&(this.yylineno+=n.length),this.yylloc={first_line:this.yylloc.last_line,last_line:this.yylineno+1,first_column:this.yylloc.last_column,last_column:n?n[n.length-1].length-n[n.length-1].match(/\r?\n?/)[0].length:this.yylloc.last_column+t[0].length},this.yytext+=t[0],this.match+=t[0],this.matches=t,this.yyleng=this.yytext.length,this.options.ranges&&(this.yylloc.range=[this.offset,this.offset+=this.yyleng]),this._more=!1,this._backtrack=!1,this._input=this._input.slice(t[0].length),this.matched+=t[0],r=this.performAction.call(this,this.yy,this,e,this.conditionStack[this.conditionStack.length-1]),this.done&&this._input&&(this.done=!1),r)return r;if(this._backtrack){for(var a in i)this[a]=i[a];return!1}return!1},next:function(){if(this.done)return this.EOF;this._input||(this.done=!0);var t,e,r,n;this._more||(this.yytext="",this.match="");for(var i=this._currentRules(),a=0;a<i.length;a++)if(r=this._input.match(this.rules[i[a]]),r&&(!e||r[0].length>e[0].length)){if(e=r,n=a,this.options.backtrack_lexer){if(t=this.test_match(r,i[a]),t!==!1)return t;if(this._backtrack){e=!1;continue}return!1}if(!this.options.flex)break}return e?(t=this.test_match(e,i[n]),t!==!1?t:!1):""===this._input?this.EOF:this.parseError("Lexical error on line "+(this.yylineno+1)+". Unrecognized text.\n"+this.showPosition(),{text:"",token:null,line:this.yylineno})},lex:function(){var t=this.next();return t?t:this.lex()},begin:function(t){this.conditionStack.push(t)},popState:function(){var t=this.conditionStack.length-1;return t>0?this.conditionStack.pop():this.conditionStack[0]},_currentRules:function(){return this.conditionStack.length&&this.conditionStack[this.conditionStack.length-1]?this.conditions[this.conditionStack[this.conditionStack.length-1]].rules:this.conditions.INITIAL.rules},topState:function(t){return t=this.conditionStack.length-1-Math.abs(t||0),t>=0?this.conditionStack[t]:"INITIAL"},pushState:function(t){this.begin(t)},stateStackSize:function(){return this.conditionStack.length},options:{},performAction:function(t,e,r,n){switch(r){case 0:break;case 1:this.begin("string");break;case 2:this.popState();break;case 3:return"STR";case 4:return 71;case 5:return 78;case 6:return 72;case 7:return 73;case 8:return 74;case 9:return 75;case 10:return 12;case 11:return 30;case 12:return 32;case 13:return 13;case 14:return 13;case 15:return 13;case 16:return 13;case 17:return 13;case 18:return 13;case 19:return 81;case 20:return 90;case 21:return 88;case 22:return 8;case 23:return 85;case 24:return 97;case 25:return 16;case 26:return 15;case 27:return 17;case 28:return 18;case 29:return 53;case 30:return 51;case 31:return 52;case 32:return 54;case 33:return 58;case 34:return 56;case 35:return 57;case 36:return 59;case 37:return 58;case 38:return 56;case 39:return 57;case 40:return 59;case 41:return 63;case 42:return 61;case 43:return 62;case 44:return 64;case 45:return 50;case 46:return 55;case 47:return 60;case 48:return 40;case 49:return 41;case 50:return 46;case 51:return 91;case 52:return 95;case 53:return 83;case 54:return 96;case 55:return 96;case 56:return 87;case 57:return 93;case 58:return 94;case 59:return 65;case 60:return 38;case 61:return 39;case 62:return 36;case 63:return 37;case 64:return 42;case 65:return 43;case 66:return 100;case 67:return 9;case 68:return 10;case 69:return 11}},rules:[/^(?:%%[^\n]*)/,/^(?:["])/,/^(?:["])/,/^(?:[^"]*)/,/^(?:style\b)/,/^(?:default\b)/,/^(?:linkStyle\b)/,/^(?:classDef\b)/,/^(?:class\b)/,/^(?:click\b)/,/^(?:graph\b)/,/^(?:subgraph\b)/,/^(?:end\b\s*)/,/^(?:LR\b)/,/^(?:RL\b)/,/^(?:TB\b)/,/^(?:BT\b)/,/^(?:TD\b)/,/^(?:BR\b)/,/^(?:[0-9]+)/,/^(?:#)/,/^(?::)/,/^(?:;)/,/^(?:,)/,/^(?:\*)/,/^(?:<)/,/^(?:>)/,/^(?:\^)/,/^(?:v\b)/,/^(?:\s*--[x]\s*)/,/^(?:\s*-->\s*)/,/^(?:\s*--[o]\s*)/,/^(?:\s*---\s*)/,/^(?:\s*-\.-[x]\s*)/,/^(?:\s*-\.->\s*)/,/^(?:\s*-\.-[o]\s*)/,/^(?:\s*-\.-\s*)/,/^(?:\s*.-[x]\s*)/,/^(?:\s*\.->\s*)/,/^(?:\s*\.-[o]\s*)/,/^(?:\s*\.-\s*)/,/^(?:\s*==[x]\s*)/,/^(?:\s*==>\s*)/,/^(?:\s*==[o]\s*)/,/^(?:\s*==[\=]\s*)/,/^(?:\s*--\s*)/,/^(?:\s*-\.\s*)/,/^(?:\s*==\s*)/,/^(?:\(-)/,/^(?:-\))/,/^(?:-)/,/^(?:\.)/,/^(?:\+)/,/^(?:%)/,/^(?:=)/,/^(?:=)/,/^(?:[A-Za-z]+)/,/^(?:[!"#$%&'*+,-.`?\\_\/])/,/^(?:[\u00AA\u00B5\u00BA\u00C0-\u00D6\u00D8-\u00F6]|[\u00F8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377]|[\u037A-\u037D\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5]|[\u03F7-\u0481\u048A-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA]|[\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE]|[\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA]|[\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0]|[\u08A2-\u08AC\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0977]|[\u0979-\u097F\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2]|[\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A]|[\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39]|[\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8]|[\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0B05-\u0B0C]|[\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C]|[\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99]|[\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0]|[\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C33\u0C35-\u0C39\u0C3D]|[\u0C58\u0C59\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3]|[\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10]|[\u0D12-\u0D3A\u0D3D\u0D4E\u0D60\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1]|[\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81]|[\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3]|[\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6]|[\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A]|[\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081]|[\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D]|[\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0]|[\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310]|[\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F4\u1401-\u166C]|[\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u1700-\u170C\u170E-\u1711]|[\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7]|[\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191C]|[\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19C1-\u19C7\u1A00-\u1A16]|[\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF]|[\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC]|[\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D]|[\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D]|[\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3]|[\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F]|[\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128]|[\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2183\u2184]|[\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3]|[\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6]|[\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE]|[\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005\u3006\u3031-\u3035\u303B\u303C]|[\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D]|[\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC]|[\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B]|[\uA640-\uA66E\uA67F-\uA697\uA6A0-\uA6E5\uA717-\uA71F\uA722-\uA788]|[\uA78B-\uA78E\uA790-\uA793\uA7A0-\uA7AA\uA7F8-\uA801\uA803-\uA805]|[\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB]|[\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uAA00-\uAA28]|[\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA80-\uAAAF\uAAB1\uAAB5]|[\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4]|[\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E]|[\uABC0-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D]|[\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36]|[\uFB38-\uF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t}();return Dt.lexer=Ct,t.prototype=Dt,Dt.Parser=t,new t}();"undefined"!=typeof t&&"undefined"!=typeof r&&(r.parser=i,r.Parser=i.Parser,r.parse=function(){return i.parse.apply(i,arguments)},r.main=function(e){e[1]||(console.log("Usage: "+e[0]+" FILE"),n.exit(1));var i=t("fs").readFileSync(t("path").normalize(e[1]),"utf8");return r.parser.parse(i)},"undefined"!=typeof e&&t.main===e&&r.main(n.argv.slice(1)))}).call(this,t("_process"))},{_process:3,fs:1,path:2}],119:[function(t,e,r){(function(e){"use strict";var n=t("moment"),i=t("../../logger"),a=new i.Log,s="",o="",u=[],c=[],l="";r.clear=function(){u=[],c=[],l="",o="",g=0,h=void 0,d=void 0,b=[]},r.setDateFormat=function(t){s=t},r.getDateFormat=function(){return s},r.setTitle=function(t){o=t},r.getTitle=function(){return o},r.addSection=function(t){l=t,u.push(t)},r.getTasks=function(){for(var t=A(),e=10,r=0;!t&&e>r;)t=A(),r++;return c=b};var h,d,f=function(t,e,i){i=i.trim();var s=/^after\s+([\d\w\-]+)/,o=s.exec(i.trim());if(null!==o){var u=r.findTaskById(o[1]);if("undefined"==typeof u){var c=new Date;return c.setHours(0,0,0,0),c}return u.endTime}return n(i,e.trim(),!0).isValid()?n(i,e.trim(),!0).toDate():(a.debug("Invalid date:"+i),a.debug("With date format:"+e.trim()),new Date)},p=function(t,e,r){if(r=r.trim(),n(r,e.trim(),!0).isValid())return n(r,e.trim()).toDate();var i=n(t),a=/^([\d]+)([wdhms])/,s=a.exec(r.trim());if(null!==s){switch(s[2]){case"s":i.add(s[1],"seconds");break;case"m":i.add(s[1],"minutes");break;case"h":i.add(s[1],"hours");break;case"d":i.add(s[1],"days");break;case"w":i.add(s[1],"weeks")}return i.toDate()}return i.toDate()},g=0,m=function(t){return"undefined"==typeof t?(g+=1,"task"+g):t},y=function(t,e){var n;n=":"===e.substr(0,1)?e.substr(1,e.length):e;for(var i=n.split(","),a={},s=r.getDateFormat(),o=!0;o;)o=!1,i[0].match(/^\s*active\s*$/)&&(a.active=!0,i.shift(1),o=!0),i[0].match(/^\s*done\s*$/)&&(a.done=!0,i.shift(1),o=!0),i[0].match(/^\s*crit\s*$/)&&(a.crit=!0,i.shift(1),o=!0);var u;for(u=0;u<i.length;u++)i[u]=i[u].trim();switch(i.length){case 1:a.id=m(),a.startTime=t.endTime,a.endTime=p(a.startTime,s,i[0]);break;case 2:a.id=m(),a.startTime=f(void 0,s,i[0]),a.endTime=p(a.startTime,s,i[1]);break;case 3:a.id=m(i[0]),a.startTime=f(void 0,s,i[1]),a.endTime=p(a.startTime,s,i[2])}return a},v=function(t,e){var r;r=":"===e.substr(0,1)?e.substr(1,e.length):e;for(var n=r.split(","),i={},a=!0;a;)a=!1,n[0].match(/^\s*active\s*$/)&&(i.active=!0,n.shift(1),a=!0),n[0].match(/^\s*done\s*$/)&&(i.done=!0,n.shift(1),a=!0),n[0].match(/^\s*crit\s*$/)&&(i.crit=!0,n.shift(1),a=!0);var s;for(s=0;s<n.length;s++)n[s]=n[s].trim();switch(n.length){case 1:i.id=m(),i.startTime={type:"prevTaskEnd",id:t},i.endTime={data:n[0]};break;case 2:i.id=m(),i.startTime={type:"getStartDate",startData:n[0]},i.endTime={data:n[1]};break;case 3:i.id=m(n[0]),i.startTime={type:"getStartDate",startData:n[1]},i.endTime={data:n[2]}}return i},b=[],_={};r.addTask=function(t,e){var r={section:l,type:l,processed:!1,raw:{data:e},task:t},n=v(d,e);r.raw.startTime=n.startTime,r.raw.endTime=n.endTime,r.id=n.id,r.prevTaskId=d,r.active=n.active,r.done=n.done,r.crit=n.crit;var i=b.push(r);d=r.id,_[r.id]=i-1},r.findTaskById=function(t){var e=_[t];return b[e]},r.addTaskOrg=function(t,e){var r={section:l,type:l,description:t,task:t},n=y(h,e);r.startTime=n.startTime,r.endTime=n.endTime,r.id=n.id,r.active=n.active,r.done=n.done,r.crit=n.crit,h=r,c.push(r)};var A=function(){var t,e=r.getDateFormat(),n=function(t){var n=b[t],i="";switch(b[t].raw.startTime.type){case"prevTaskEnd":var a=r.findTaskById(n.prevTaskId);n.startTime=a.endTime;break;case"getStartDate":i=f(void 0,e,b[t].raw.startTime.startData),i&&(b[t].startTime=i)}return b[t].startTime&&(b[t].endTime=p(b[t].startTime,e,b[t].raw.endTime.data),b[t].endTime&&(b[t].processed=!0)),b[t].processed},i=!0;for(t=0;t<b.length;t++)n(t),i=i&&b[t].processed;
+return i};r.parseError=function(t,r){e.mermaidAPI.parseError(t,r)}}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{"../../logger":126,moment:105}],120:[function(t,e,r){"use strict";var n=t("./parser/gantt").parser;n.yy=t("./ganttDb");var i,a=t("../../d3"),s=t("moment"),o={titleTopMargin:25,barHeight:20,barGap:4,topPadding:50,sidePadding:75,gridLineStartPadding:35,fontSize:11,fontFamily:'"Open-Sans", "sans-serif"'};e.exports.setConf=function(t){var e=Object.keys(t);e.forEach(function(e){o[e]=t[e]})};var u;e.exports.draw=function(t,e){function r(t,e,r){var n=o.barHeight,i=n+o.barGap,s=o.topPadding,u=o.sidePadding,f=a.scale.linear().domain([0,x.length]).range(["#00B9FA","#F95002"]).interpolate(a.interpolateHcl);l(u,s,e,r),c(t,i,s,u,n,f,e,r),h(i,s,u,n,f),d(u,s,e,r)}function c(t,e,r,n,i,a,s,u){b.append("g").selectAll("rect").data(t).enter().append("rect").attr("x",0).attr("y",function(t,n){return n*e+r-2}).attr("width",function(){return s-n/2}).attr("height",e).attr("class",function(t){for(var e=0;e<x.length;e++)if(t.type===x[e])return"section section"+e%o.numberSectionStyles;return"section section0"});var c=b.append("g").selectAll("rect").data(t).enter();c.append("rect").attr("rx",3).attr("ry",3).attr("x",function(t){return w(t.startTime)+n}).attr("y",function(t,n){return n*e+r}).attr("width",function(t){return w(t.endTime)-w(t.startTime)}).attr("height",i).attr("class",function(t){for(var e="task ",r=0,n=0;n<x.length;n++)t.type===x[n]&&(r=n%o.numberSectionStyles);return t.active?t.crit?e+" activeCrit"+r:e+" active"+r:t.done?t.crit?e+" doneCrit"+r:e+" done"+r:t.crit?e+" crit"+r:e+" task"+r}),c.append("text").text(function(t){return t.task}).attr("font-size",o.fontSize).attr("x",function(t){var e=w(t.startTime),r=w(t.endTime),i=this.getBBox().width;return i>r-e?r+i+1.5*o.sidePadding>s?e+n-5:r+n+5:(r-e)/2+e+n}).attr("y",function(t,n){return n*e+o.barHeight/2+(o.fontSize/2-2)+r}).attr("text-height",i).attr("class",function(t){for(var e=w(t.startTime),r=w(t.endTime),n=this.getBBox().width,i=0,a=0;a<x.length;a++)t.type===x[a]&&(i=a%o.numberSectionStyles);var u="";return t.active&&(u=t.crit?"activeCritText"+i:"activeText"+i),t.done?u=t.crit?u+" doneCritText"+i:u+" doneText"+i:t.crit&&(u=u+" critText"+i),n>r-e?r+n+1.5*o.sidePadding>s?"taskTextOutsideLeft taskTextOutside"+i+" "+u:"taskTextOutsideRight taskTextOutside"+i+" "+u:"taskText taskText"+i+" "+u})}function l(t,e,r,n){var s,u=[[".%L",function(t){return t.getMilliseconds()}],[":%S",function(t){return t.getSeconds()}],["h1 %I:%M",function(t){return t.getMinutes()}]],c=[["%Y",function(){return!0}]],l=[["%I:%M",function(t){return t.getHours()}],["%a %d",function(t){return t.getDay()&&1!=t.getDate()}],["%b %d",function(t){return 1!=t.getDate()}],["%B",function(t){return t.getMonth()}]];"undefined"!=typeof o.axisFormatter&&(l=[],o.axisFormatter.forEach(function(t){var 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n=this.match.split(/(?:\r\n?|\n)/g);this.match=this.match.substr(0,this.match.length-1),this.matched=this.matched.substr(0,this.matched.length-1),r.length-1&&(this.yylineno-=r.length-1);var i=this.yylloc.range;return this.yylloc={first_line:this.yylloc.first_line,last_line:this.yylineno+1,first_column:this.yylloc.first_column,last_column:r?(r.length===n.length?this.yylloc.first_column:0)+n[n.length-r.length].length-r[0].length:this.yylloc.first_column-e},this.options.ranges&&(this.yylloc.range=[i[0],i[0]+this.yyleng-e]),this.yyleng=this.yytext.length,this},more:function(){return this._more=!0,this},reject:function(){return this.options.backtrack_lexer?(this._backtrack=!0,this):this.parseError("Lexical error on line "+(this.yylineno+1)+". You can only invoke reject() in the lexer when the lexer is of the backtracking persuasion (options.backtrack_lexer = true).\n"+this.showPosition(),{text:"",token:null,line:this.yylineno})},less:function(t){this.unput(this.match.slice(t))},pastInput:function(){var t=this.matched.substr(0,this.matched.length-this.match.length);return(t.length>20?"...":"")+t.substr(-20).replace(/\n/g,"")},upcomingInput:function(){var t=this.match;return t.length<20&&(t+=this._input.substr(0,20-t.length)),(t.substr(0,20)+(t.length>20?"...":"")).replace(/\n/g,"")},showPosition:function(){var t=this.pastInput(),e=new Array(t.length+1).join("-");return t+this.upcomingInput()+"\n"+e+"^"},test_match:function(t,e){var r,n,i;if(this.options.backtrack_lexer&&(i={yylineno:this.yylineno,yylloc:{first_line:this.yylloc.first_line,last_line:this.last_line,first_column:this.yylloc.first_column,last_column:this.yylloc.last_column},yytext:this.yytext,match:this.match,matches:this.matches,matched:this.matched,yyleng:this.yyleng,offset:this.offset,_more:this._more,_input:this._input,yy:this.yy,conditionStack:this.conditionStack.slice(0),done:this.done},this.options.ranges&&(i.yylloc.range=this.yylloc.range.slice(0))),n=t[0].match(/(?:\r\n?|\n).*/g),n&&(this.yylineno+=n.length),this.yylloc={first_line:this.yylloc.last_line,last_line:this.yylineno+1,first_column:this.yylloc.last_column,last_column:n?n[n.length-1].length-n[n.length-1].match(/\r?\n?/)[0].length:this.yylloc.last_column+t[0].length},this.yytext+=t[0],this.match+=t[0],this.matches=t,this.yyleng=this.yytext.length,this.options.ranges&&(this.yylloc.range=[this.offset,this.offset+=this.yyleng]),this._more=!1,this._backtrack=!1,this._input=this._input.slice(t[0].length),this.matched+=t[0],r=this.performAction.call(this,this.yy,this,e,this.conditionStack[this.conditionStack.length-1]),this.done&&this._input&&(this.done=!1),r)return r;if(this._backtrack){for(var a in i)this[a]=i[a];return!1}return!1},next:function(){if(this.done)return this.EOF;this._input||(this.done=!0);var t,e,r,n;this._more||(this.yytext="",this.match="");for(var i=this._currentRules(),a=0;a<i.length;a++)if(r=this._input.match(this.rules[i[a]]),r&&(!e||r[0].length>e[0].length)){if(e=r,n=a,this.options.backtrack_lexer){if(t=this.test_match(r,i[a]),t!==!1)return t;if(this._backtrack){e=!1;continue}return!1}if(!this.options.flex)break}return e?(t=this.test_match(e,i[n]),t!==!1?t:!1):""===this._input?this.EOF:this.parseError("Lexical error on line "+(this.yylineno+1)+". Unrecognized text.\n"+this.showPosition(),{text:"",token:null,line:this.yylineno})},lex:function(){var t=this.next();return t?t:this.lex()},begin:function(t){this.conditionStack.push(t)},popState:function(){var t=this.conditionStack.length-1;return t>0?this.conditionStack.pop():this.conditionStack[0]},_currentRules:function(){return this.conditionStack.length&&this.conditionStack[this.conditionStack.length-1]?this.conditions[this.conditionStack[this.conditionStack.length-1]].rules:this.conditions.INITIAL.rules},topState:function(t){return t=this.conditionStack.length-1-Math.abs(t||0),t>=0?this.conditionStack[t]:"INITIAL"},pushState:function(t){this.begin(t)},stateStackSize:function(){return this.conditionStack.length},options:{"case-insensitive":!0},performAction:function(t,e,r,n){switch(r){case 0:return 10;case 1:break;case 2:break;case 3:break;case 4:return 4;case 5:return 11;case 6:return"date";case 7:return 12;case 8:return 13;case 9:return 14;case 10:return 15;case 11:return":";case 12:return 6;case 13:return"INVALID"}},rules:[/^(?:[\n]+)/i,/^(?:\s+)/i,/^(?:#[^\n]*)/i,/^(?:%[^\n]*)/i,/^(?:gantt\b)/i,/^(?:dateFormat\s[^#\n;]+)/i,/^(?:\d\d\d\d-\d\d-\d\d\b)/i,/^(?:title\s[^#\n;]+)/i,/^(?:section\s[^#:\n;]+)/i,/^(?:[^#:\n;]+)/i,/^(?::[^#\n;]+)/i,/^(?::)/i,/^(?:$)/i,/^(?:.)/i],conditions:{INITIAL:{rules:[0,1,2,3,4,5,6,7,8,9,10,11,12,13],inclusive:!0}}};return t}();return o.lexer=u,t.prototype=o,o.Parser=t,new t}();"undefined"!=typeof t&&"undefined"!=typeof r&&(r.parser=i,r.Parser=i.Parser,r.parse=function(){return i.parse.apply(i,arguments)},r.main=function(e){e[1]||(console.log("Usage: "+e[0]+" FILE"),n.exit(1));var i=t("fs").readFileSync(t("path").normalize(e[1]),"utf8");return r.parser.parse(i)},"undefined"!=typeof e&&t.main===e&&r.main(n.argv.slice(1)))}).call(this,t("_process"))},{_process:3,fs:1,path:2}],122:[function(t,e,r){(function(n){"use strict";var i=function(){function t(){this.yy={}}var e=function(t,e,r,n){for(r=r||{},n=t.length;n--;r[t[n]]=e);return r},r=[2,2],n=[1,5],i=[1,7],a=[1,8],s=[1,11],o=[1,12],u=[1,13],c=[1,14],l=[1,16],h=[1,17],d=[1,7,9,10,16,18,19,20,21,22,23,33],f=[7,9,10,16,18,19,20,21,23,33],p=[1,53],g={trace:function(){},yy:{},symbols_:{error:2,start:3,SD:4,document:5,line:6,SPACE:7,statement:8,NL:9,participant:10,actor:11,AS:12,restOfLine:13,signal:14,note_statement:15,title:16,text:17,loop:18,end:19,opt:20,alt:21,"else":22,note:23,placement:24,text2:25,over:26,actor_pair:27,spaceList:28,",":29,left_of:30,right_of:31,signaltype:32,ACTOR:33,SOLID_OPEN_ARROW:34,DOTTED_OPEN_ARROW:35,SOLID_ARROW:36,DOTTED_ARROW:37,SOLID_CROSS:38,DOTTED_CROSS:39,TXT:40,$accept:0,$end:1},terminals_:{2:"error",4:"SD",7:"SPACE",9:"NL",10:"participant",12:"AS",13:"restOfLine",16:"title",17:"text",18:"loop",19:"end",20:"opt",21:"alt",22:"else",23:"note",26:"over",29:",",30:"left_of",31:"right_of",33:"ACTOR",34:"SOLID_OPEN_ARROW",35:"DOTTED_OPEN_ARROW",36:"SOLID_ARROW",37:"DOTTED_ARROW",38:"SOLID_CROSS",39:"DOTTED_CROSS",40:"TXT"},productions_:[0,[3,2],[5,0],[5,2],[6,2],[6,1],[6,1],[8,5],[8,3],[8,2],[8,2],[8,4],[8,4],[8,4],[8,7],[15,4],[15,4],[28,2],[28,1],[27,3],[27,1],[24,1],[24,1],[14,4],[11,1],[32,1],[32,1],[32,1],[32,1],[32,1],[32,1],[25,1]],performAction:function(t,e,r,n,i,a,s){var o=a.length-1;switch(i){case 1:return n.apply(a[o]),a[o];case 2:this.$=[];break;case 3:a[o-1].push(a[o]),this.$=a[o-1];break;case 4:case 5:this.$=a[o];break;case 6:this.$=[];break;case 7:a[o-3].description=a[o-1],this.$=a[o-3];break;case 8:this.$=a[o-1];break;case 12:a[o-1].unshift({type:"loopStart",loopText:a[o-2],signalType:n.LINETYPE.LOOP_START}),a[o-1].push({type:"loopEnd",loopText:a[o-2],signalType:n.LINETYPE.LOOP_END}),this.$=a[o-1];break;case 13:a[o-1].unshift({type:"optStart",optText:a[o-2],signalType:n.LINETYPE.OPT_START}),a[o-1].push({type:"optEnd",optText:a[o-2],signalType:n.LINETYPE.OPT_END}),this.$=a[o-1];break;case 14:a[o-4].unshift({type:"altStart",altText:a[o-5],signalType:n.LINETYPE.ALT_START}),a[o-4].push({type:"else",altText:a[o-2],signalType:n.LINETYPE.ALT_ELSE}),a[o-4]=a[o-4].concat(a[o-1]),a[o-4].push({type:"altEnd",signalType:n.LINETYPE.ALT_END}),this.$=a[o-4];break;case 15:this.$=[a[o-1],{type:"addNote",placement:a[o-2],actor:a[o-1].actor,text:a[o]}];break;case 16:a[o-2]=[].concat(a[o-1],a[o-1]).slice(0,2),a[o-2][0]=a[o-2][0].actor,a[o-2][1]=a[o-2][1].actor,this.$=[a[o-1],{type:"addNote",placement:n.PLACEMENT.OVER,actor:a[o-2].slice(0,2),text:a[o]}];break;case 19:this.$=[a[o-2],a[o]];break;case 20:this.$=a[o];break;case 21:this.$=n.PLACEMENT.LEFTOF;break;case 22:this.$=n.PLACEMENT.RIGHTOF;break;case 23:this.$=[a[o-3],a[o-1],{type:"addMessage",from:a[o-3].actor,to:a[o-1].actor,signalType:a[o-2],msg:a[o]}];break;case 24:this.$={type:"addActor",actor:a[o]};break;case 25:this.$=n.LINETYPE.SOLID_OPEN;break;case 26:this.$=n.LINETYPE.DOTTED_OPEN;break;case 27:this.$=n.LINETYPE.SOLID;break;case 28:this.$=n.LINETYPE.DOTTED;break;case 29:this.$=n.LINETYPE.SOLID_CROSS;break;case 30:this.$=n.LINETYPE.DOTTED_CROSS;break;case 31:this.$=a[o].substring(1).trim().replace(/\\n/gm,"\n")}},table:[{3:1,4:[1,2]},{1:[3]},e([1,7,9,10,16,18,20,21,23,33],r,{5:3}),{1:[2,1],6:4,7:n,8:6,9:i,10:a,11:15,14:9,15:10,16:s,18:o,20:u,21:c,23:l,33:h},e(d,[2,3]),{8:18,10:a,11:15,14:9,15:10,16:s,18:o,20:u,21:c,23:l,33:h},e(d,[2,5]),e(d,[2,6]),{11:19,33:h},{9:[1,20]},{9:[1,21]},{7:[1,22]},{13:[1,23]},{13:[1,24]},{13:[1,25]},{32:26,34:[1,27],35:[1,28],36:[1,29],37:[1,30],38:[1,31],39:[1,32]},{24:33,26:[1,34],30:[1,35],31:[1,36]},e([9,12,29,34,35,36,37,38,39,40],[2,24]),e(d,[2,4]),{9:[1,38],12:[1,37]},e(d,[2,9]),e(d,[2,10]),{17:[1,39]},e(f,r,{5:40}),e(f,r,{5:41}),e([7,9,10,16,18,20,21,22,23,33],r,{5:42}),{11:43,33:h},{33:[2,25]},{33:[2,26]},{33:[2,27]},{33:[2,28]},{33:[2,29]},{33:[2,30]},{11:44,33:h},{11:46,27:45,33:h},{33:[2,21]},{33:[2,22]},{13:[1,47]},e(d,[2,8]),{9:[1,48]},{6:4,7:n,8:6,9:i,10:a,11:15,14:9,15:10,16:s,18:o,19:[1,49],20:u,21:c,23:l,33:h},{6:4,7:n,8:6,9:i,10:a,11:15,14:9,15:10,16:s,18:o,19:[1,50],20:u,21:c,23:l,33:h},{6:4,7:n,8:6,9:i,10:a,11:15,14:9,15:10,16:s,18:o,20:u,21:c,22:[1,51],23:l,33:h},{25:52,40:p},{25:54,40:p},{25:55,40:p},{29:[1,56],40:[2,20]},{9:[1,57]},e(d,[2,11]),e(d,[2,12]),e(d,[2,13]),{13:[1,58]},{9:[2,23]},{9:[2,31]},{9:[2,15]},{9:[2,16]},{11:59,33:h},e(d,[2,7]),e(f,r,{5:60}),{40:[2,19]},{6:4,7:n,8:6,9:i,10:a,11:15,14:9,15:10,16:s,18:o,19:[1,61],20:u,21:c,23:l,33:h},e(d,[2,14])],defaultActions:{27:[2,25],28:[2,26],29:[2,27],30:[2,28],31:[2,29],32:[2,30],35:[2,21],36:[2,22],52:[2,23],53:[2,31],54:[2,15],55:[2,16],59:[2,19]},parseError:function(t,e){if(!e.recoverable){var r=function(t,e){this.message=t,this.hash=e};throw r.prototype=new Error,new r(t,e)}this.trace(t)},parse:function(t){var e=this,r=[0],n=[null],i=[],a=this.table,s="",o=0,u=0,c=0,l=2,h=1,d=i.slice.call(arguments,1),f=Object.create(this.lexer),p={yy:{}};for(var g in this.yy)Object.prototype.hasOwnProperty.call(this.yy,g)&&(p.yy[g]=this.yy[g]);f.setInput(t,p.yy),p.yy.lexer=f,p.yy.parser=this,"undefined"==typeof f.yylloc&&(f.yylloc={});var m=f.yylloc;i.push(m);var y=f.options&&f.options.ranges;"function"==typeof p.yy.parseError?this.parseError=p.yy.parseError:this.parseError=Object.getPrototypeOf(this).parseError;for(var v,b,_,A,w,x,E,k,D,C=function(){var t;return t=f.lex()||h,"number"!=typeof t&&(t=e.symbols_[t]||t),t},F={};;){if(_=r[r.length-1],this.defaultActions[_]?A=this.defaultActions[_]:((null===v||"undefined"==typeof v)&&(v=C()),A=a[_]&&a[_][v]),"undefined"==typeof A||!A.length||!A[0]){var T="";D=[];for(x in a[_])this.terminals_[x]&&x>l&&D.push("'"+this.terminals_[x]+"'");T=f.showPosition?"Parse error on line "+(o+1)+":\n"+f.showPosition()+"\nExpecting "+D.join(", ")+", got '"+(this.terminals_[v]||v)+"'":"Parse error on line "+(o+1)+": Unexpected "+(v==h?"end of input":"'"+(this.terminals_[v]||v)+"'"),this.parseError(T,{text:f.match,token:this.terminals_[v]||v,line:f.yylineno,loc:m,expected:D})}if(A[0]instanceof Array&&A.length>1)throw new Error("Parse Error: multiple actions possible at state: "+_+", token: "+v);switch(A[0]){case 1:r.push(v),n.push(f.yytext),i.push(f.yylloc),r.push(A[1]),v=null,b?(v=b,b=null):(u=f.yyleng,s=f.yytext,o=f.yylineno,m=f.yylloc,c>0&&c--);break;case 2:if(E=this.productions_[A[1]][1],F.$=n[n.length-E],F._$={first_line:i[i.length-(E||1)].first_line,last_line:i[i.length-1].last_line,first_column:i[i.length-(E||1)].first_column,last_column:i[i.length-1].last_column},y&&(F._$.range=[i[i.length-(E||1)].range[0],i[i.length-1].range[1]]),w=this.performAction.apply(F,[s,u,o,p.yy,A[1],n,i].concat(d)),"undefined"!=typeof w)return w;E&&(r=r.slice(0,-1*E*2),n=n.slice(0,-1*E),i=i.slice(0,-1*E)),r.push(this.productions_[A[1]][0]),n.push(F.$),i.push(F._$),k=a[r[r.length-2]][r[r.length-1]],r.push(k);break;case 3:return!0}}return!0}},m=function(){var t={EOF:1,parseError:function(t,e){if(!this.yy.parser)throw new Error(t);this.yy.parser.parseError(t,e)},setInput:function(t,e){return this.yy=e||this.yy||{},this._input=t,this._more=this._backtrack=this.done=!1,this.yylineno=this.yyleng=0,this.yytext=this.matched=this.match="",this.conditionStack=["INITIAL"],this.yylloc={first_line:1,first_column:0,last_line:1,last_column:0},this.options.ranges&&(this.yylloc.range=[0,0]),this.offset=0,this},input:function(){var t=this._input[0];this.yytext+=t,this.yyleng++,this.offset++,this.match+=t,this.matched+=t;var e=t.match(/(?:\r\n?|\n).*/g);return e?(this.yylineno++,this.yylloc.last_line++):this.yylloc.last_column++,this.options.ranges&&this.yylloc.range[1]++,this._input=this._input.slice(1),t},unput:function(t){var e=t.length,r=t.split(/(?:\r\n?|\n)/g);this._input=t+this._input,this.yytext=this.yytext.substr(0,this.yytext.length-e),this.offset-=e;var n=this.match.split(/(?:\r\n?|\n)/g);this.match=this.match.substr(0,this.match.length-1),this.matched=this.matched.substr(0,this.matched.length-1),r.length-1&&(this.yylineno-=r.length-1);var i=this.yylloc.range;return this.yylloc={first_line:this.yylloc.first_line,last_line:this.yylineno+1,first_column:this.yylloc.first_column,last_column:r?(r.length===n.length?this.yylloc.first_column:0)+n[n.length-r.length].length-r[0].length:this.yylloc.first_column-e},this.options.ranges&&(this.yylloc.range=[i[0],i[0]+this.yyleng-e]),this.yyleng=this.yytext.length,this},more:function(){return this._more=!0,this},reject:function(){return this.options.backtrack_lexer?(this._backtrack=!0,this):this.parseError("Lexical error on line "+(this.yylineno+1)+". You can only invoke reject() in the lexer when the lexer is of the backtracking persuasion (options.backtrack_lexer = true).\n"+this.showPosition(),{text:"",token:null,line:this.yylineno})},less:function(t){this.unput(this.match.slice(t))},pastInput:function(){var t=this.matched.substr(0,this.matched.length-this.match.length);return(t.length>20?"...":"")+t.substr(-20).replace(/\n/g,"")},upcomingInput:function(){var t=this.match;return t.length<20&&(t+=this._input.substr(0,20-t.length)),(t.substr(0,20)+(t.length>20?"...":"")).replace(/\n/g,"")},showPosition:function(){var t=this.pastInput(),e=new Array(t.length+1).join("-");return t+this.upcomingInput()+"\n"+e+"^"},test_match:function(t,e){var r,n,i;if(this.options.backtrack_lexer&&(i={yylineno:this.yylineno,yylloc:{first_line:this.yylloc.first_line,last_line:this.last_line,first_column:this.yylloc.first_column,last_column:this.yylloc.last_column},yytext:this.yytext,match:this.match,matches:this.matches,matched:this.matched,yyleng:this.yyleng,offset:this.offset,_more:this._more,_input:this._input,yy:this.yy,conditionStack:this.conditionStack.slice(0),done:this.done},this.options.ranges&&(i.yylloc.range=this.yylloc.range.slice(0))),n=t[0].match(/(?:\r\n?|\n).*/g),n&&(this.yylineno+=n.length),this.yylloc={first_line:this.yylloc.last_line,last_line:this.yylineno+1,first_column:this.yylloc.last_column,last_column:n?n[n.length-1].length-n[n.length-1].match(/\r?\n?/)[0].length:this.yylloc.last_column+t[0].length},this.yytext+=t[0],this.match+=t[0],this.matches=t,this.yyleng=this.yytext.length,this.options.ranges&&(this.yylloc.range=[this.offset,this.offset+=this.yyleng]),this._more=!1,this._backtrack=!1,this._input=this._input.slice(t[0].length),this.matched+=t[0],r=this.performAction.call(this,this.yy,this,e,this.conditionStack[this.conditionStack.length-1]),this.done&&this._input&&(this.done=!1),r)return r;if(this._backtrack){for(var a in i)this[a]=i[a];return!1}return!1},next:function(){if(this.done)return this.EOF;this._input||(this.done=!0);var t,e,r,n;this._more||(this.yytext="",this.match="");for(var i=this._currentRules(),a=0;a<i.length;a++)if(r=this._input.match(this.rules[i[a]]),r&&(!e||r[0].length>e[0].length)){if(e=r,n=a,this.options.backtrack_lexer){if(t=this.test_match(r,i[a]),t!==!1)return t;if(this._backtrack){e=!1;continue}return!1}if(!this.options.flex)break}return e?(t=this.test_match(e,i[n]),t!==!1?t:!1):""===this._input?this.EOF:this.parseError("Lexical error on line "+(this.yylineno+1)+". Unrecognized text.\n"+this.showPosition(),{text:"",token:null,line:this.yylineno})},lex:function(){var t=this.next();return t?t:this.lex()},begin:function(t){this.conditionStack.push(t)},popState:function(){var t=this.conditionStack.length-1;return t>0?this.conditionStack.pop():this.conditionStack[0]},_currentRules:function(){return this.conditionStack.length&&this.conditionStack[this.conditionStack.length-1]?this.conditions[this.conditionStack[this.conditionStack.length-1]].rules:this.conditions.INITIAL.rules},topState:function(t){return t=this.conditionStack.length-1-Math.abs(t||0),t>=0?this.conditionStack[t]:"INITIAL"},pushState:function(t){this.begin(t)},stateStackSize:function(){return this.conditionStack.length},options:{"case-insensitive":!0},performAction:function(t,e,r,n){switch(r){case 0:return 9;case 1:break;case 2:break;case 3:break;case 4:break;case 5:return this.begin("ID"),10;case 6:return this.begin("ALIAS"),33;case 7:return this.popState(),this.popState(),this.begin("LINE"),12;case 8:return this.popState(),this.popState(),9;case 9:return this.begin("LINE"),18;case 10:return this.begin("LINE"),20;case 11:return this.begin("LINE"),21;case 12:return this.begin("LINE"),22;case 13:return this.popState(),13;case 14:return 19;case 15:return 30;case 16:return 31;case 17:return 26;case 18:return 23;case 19:return 16;case 20:return 4;case 21:return 29;case 22:return 9;case 23:return 33;case 24:return 36;case 25:return 37;case 26:return 34;case 27:return 35;case 28:return 38;case 29:return 39;case 30:return 40;case 31:return 9;case 32:return"INVALID"}},rules:[/^(?:[\n]+)/i,/^(?:\s+)/i,/^(?:((?!\n)\s)+)/i,/^(?:#[^\n]*)/i,/^(?:%[^\n]*)/i,/^(?:participant\b)/i,/^(?:[^\->:\n,;]+?(?=((?!\n)\s)+as(?!\n)\s|[#\n;]|$))/i,/^(?:as\b)/i,/^(?:(?:))/i,/^(?:loop\b)/i,/^(?:opt\b)/i,/^(?:alt\b)/i,/^(?:else\b)/i,/^(?:[^#\n;]*)/i,/^(?:end\b)/i,/^(?:left of\b)/i,/^(?:right of\b)/i,/^(?:over\b)/i,/^(?:note\b)/i,/^(?:title\b)/i,/^(?:sequenceDiagram\b)/i,/^(?:,)/i,/^(?:;)/i,/^(?:[^\->:\n,;]+)/i,/^(?:->>)/i,/^(?:-->>)/i,/^(?:->)/i,/^(?:-->)/i,/^(?:-[x])/i,/^(?:--[x])/i,/^(?::[^#\n;]+)/i,/^(?:$)/i,/^(?:.)/i],conditions:{LINE:{rules:[2,3,13],inclusive:!1},ALIAS:{rules:[2,3,7,8],inclusive:!1},ID:{rules:[2,3,6],inclusive:!1},INITIAL:{rules:[0,1,3,4,5,9,10,11,12,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32],inclusive:!0}}};return t}();return g.lexer=m,t.prototype=g,g.Parser=t,new t}();"undefined"!=typeof t&&"undefined"!=typeof r&&(r.parser=i,r.Parser=i.Parser,r.parse=function(){return i.parse.apply(i,arguments)},r.main=function(e){e[1]||(console.log("Usage: "+e[0]+" FILE"),n.exit(1));var i=t("fs").readFileSync(t("path").normalize(e[1]),"utf8");return r.parser.parse(i)},"undefined"!=typeof e&&t.main===e&&r.main(n.argv.slice(1)))}).call(this,t("_process"))},{_process:3,fs:1,path:2}],123:[function(t,e,r){(function(e){"use strict";var n={},i=[],a=[],s=t("../../logger"),o=new s.Log;r.addActor=function(t,e,r){var i=n[t];i&&e===i.name&&null==r||(null==r&&(r=e),n[t]={name:e,description:r})},r.addMessage=function(t,e,r,n){i.push({from:t,to:e,message:r,answer:n})},r.addSignal=function(t,e,r,n){o.debug("Adding message from="+t+" to="+e+" message="+r+" type="+n),i.push({from:t,to:e,message:r,type:n})},r.getMessages=function(){return i},r.getActors=function(){return n},r.getActor=function(t){return n[t]},r.getActorKeys=function(){return Object.keys(n)},r.clear=function(){n={},i=[]},r.LINETYPE={SOLID:0,DOTTED:1,NOTE:2,SOLID_CROSS:3,DOTTED_CROSS:4,SOLID_OPEN:5,DOTTED_OPEN:6,LOOP_START:10,LOOP_END:11,ALT_START:12,ALT_ELSE:13,ALT_END:14,OPT_START:15,OPT_END:16},r.ARROWTYPE={FILLED:0,OPEN:1},r.PLACEMENT={LEFTOF:0,RIGHTOF:1,OVER:2},r.addNote=function(t,e,n){var s={actor:t,placement:e,message:n},o=[].concat(t,t);a.push(s),i.push({from:o[0],to:o[1],message:n,type:r.LINETYPE.NOTE,placement:e})},r.parseError=function(t,r){e.mermaidAPI.parseError(t,r)},r.apply=function(t){if(t instanceof Array)t.forEach(function(t){r.apply(t)});else switch(t.type){case"addActor":r.addActor(t.actor,t.actor,t.description);break;case"addNote":r.addNote(t.actor,t.placement,t.text);break;case"addMessage":r.addSignal(t.from,t.to,t.msg,t.signalType);break;case"loopStart":r.addSignal(void 0,void 0,t.loopText,t.signalType);break;case"loopEnd":r.addSignal(void 0,void 0,void 0,t.signalType);break;case"optStart":r.addSignal(void 0,void 0,t.optText,t.signalType);break;case"optEnd":r.addSignal(void 0,void 0,void 0,t.signalType);break;case"altStart":r.addSignal(void 0,void 0,t.altText,t.signalType);break;case"else":r.addSignal(void 0,void 0,t.altText,t.signalType);break;case"altEnd":r.addSignal(void 0,void 0,void 0,t.signalType)}}}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{"../../logger":126}],124:[function(t,e,r){"use strict";var n=t("./parser/sequenceDiagram").parser;n.yy=t("./sequenceDb");var i=t("./svgDraw"),a=t("../../d3"),s=t("../../logger"),o=new s.Log,u={diagramMarginX:50,diagramMarginY:10,actorMargin:50,width:150,height:65,boxMargin:10,boxTextMargin:5,noteMargin:10,messageMargin:35,mirrorActors:!1,bottomMarginAdj:1};r.bounds={data:{startx:void 0,stopx:void 0,starty:void 0,stopy:void 0},verticalPos:0,list:[],init:function(){this.list=[],this.data={startx:void 0,stopx:void 0,starty:void 0,stopy:void 0},this.verticalPos=0},updateVal:function(t,e,r,n){"undefined"==typeof t[e]?t[e]=r:t[e]=n(r,t[e])},updateLoops:function(t,e,n,i){var a=this,s=0;this.list.forEach(function(o){s++;var c=a.list.length-s+1;a.updateVal(o,"startx",t-c*u.boxMargin,Math.min),a.updateVal(o,"starty",e-c*u.boxMargin,Math.min),a.updateVal(o,"stopx",n+c*u.boxMargin,Math.max),a.updateVal(o,"stopy",i+c*u.boxMargin,Math.max),a.updateVal(r.bounds.data,"startx",t-c*u.boxMargin,Math.min),a.updateVal(r.bounds.data,"starty",e-c*u.boxMargin,Math.min),a.updateVal(r.bounds.data,"stopx",n+c*u.boxMargin,Math.max),a.updateVal(r.bounds.data,"stopy",i+c*u.boxMargin,Math.max)})},insert:function(t,e,n,i){var a,s,o,u;a=Math.min(t,n),o=Math.max(t,n),s=Math.min(e,i),u=Math.max(e,i),this.updateVal(r.bounds.data,"startx",a,Math.min),this.updateVal(r.bounds.data,"starty",s,Math.min),this.updateVal(r.bounds.data,"stopx",o,Math.max),
+this.updateVal(r.bounds.data,"stopy",u,Math.max),this.updateLoops(a,s,o,u)},newLoop:function(t){this.list.push({startx:void 0,starty:this.verticalPos,stopx:void 0,stopy:void 0,title:t})},endLoop:function(){var t=this.list.pop();return t},addElseToLoop:function(t){var e=this.list.pop();e.elsey=r.bounds.getVerticalPos(),e.elseText=t,this.list.push(e)},bumpVerticalPos:function(t){this.verticalPos=this.verticalPos+t,this.data.stopy=this.verticalPos},getVerticalPos:function(){return this.verticalPos},getBounds:function(){return this.data}};var c=function(t,e,n,a,s){var o=i.getNoteRect();o.x=e,o.y=n,o.width=s||u.width,o["class"]="note";var c=t.append("g"),l=i.drawRect(c,o),h=i.getTextObj();h.x=e-4,h.y=n-13,h.textMargin=u.noteMargin,h.dy="1em",h.text=a.message,h["class"]="noteText";var d=i.drawText(c,h,o.width-u.noteMargin),f=d[0][0].getBBox().height;!s&&f>u.width?(d.remove(),c=t.append("g"),d=i.drawText(c,h,2*o.width-u.noteMargin),f=d[0][0].getBBox().height,l.attr("width",2*o.width),r.bounds.insert(e,n,e+2*o.width,n+2*u.noteMargin+f)):r.bounds.insert(e,n,e+o.width,n+2*u.noteMargin+f),l.attr("height",f+2*u.noteMargin),r.bounds.bumpVerticalPos(f+2*u.noteMargin)},l=function(t,e,i,a,s){var o,c=t.append("g"),l=e+(i-e)/2,h=c.append("text").attr("x",l).attr("y",a-7).style("text-anchor","middle").attr("class","messageText").text(s.message);o="undefined"!=typeof h[0][0].getBBox?h[0][0].getBBox().width:h[0][0].getBoundingClientRect();var d;if(e===i){d=c.append("path").attr("d","M "+e+","+a+" C "+(e+60)+","+(a-10)+" "+(e+60)+","+(a+30)+" "+e+","+(a+20)),r.bounds.bumpVerticalPos(30);var f=Math.max(o/2,100);r.bounds.insert(e-f,r.bounds.getVerticalPos()-10,i+f,r.bounds.getVerticalPos())}else d=c.append("line"),d.attr("x1",e),d.attr("y1",a),d.attr("x2",i),d.attr("y2",a),r.bounds.insert(e,r.bounds.getVerticalPos()-10,i,r.bounds.getVerticalPos());s.type===n.yy.LINETYPE.DOTTED||s.type===n.yy.LINETYPE.DOTTED_CROSS||s.type===n.yy.LINETYPE.DOTTED_OPEN?(d.style("stroke-dasharray","3, 3"),d.attr("class","messageLine1")):d.attr("class","messageLine0");var p="";u.arrowMarkerAbsolute&&(p=window.location.protocol+"//"+window.location.host+window.location.pathname+window.location.search,p=p.replace(/\(/g,"\\("),p=p.replace(/\)/g,"\\)")),d.attr("stroke-width",2),d.attr("stroke","black"),d.style("fill","none"),(s.type===n.yy.LINETYPE.SOLID||s.type===n.yy.LINETYPE.DOTTED)&&d.attr("marker-end","url("+p+"#arrowhead)"),(s.type===n.yy.LINETYPE.SOLID_CROSS||s.type===n.yy.LINETYPE.DOTTED_CROSS)&&d.attr("marker-end","url("+p+"#crosshead)")};e.exports.drawActors=function(t,e,n,a){var s;for(s=0;s<n.length;s++){var o=n[s];e[o].x=s*u.actorMargin+s*u.width,e[o].y=a,e[o].width=u.diagramMarginY,e[o].height=u.diagramMarginY,i.drawActor(t,e[o].x,a,e[o].description,u),r.bounds.insert(e[o].x,a,e[o].x+u.width,u.height)}r.bounds.bumpVerticalPos(u.height)},e.exports.setConf=function(t){var e=Object.keys(t);e.forEach(function(e){u[e]=t[e]})},e.exports.draw=function(t,s){n.yy.clear(),n.parse(t+"\n"),r.bounds.init();var h,d,f,p=a.select("#"+s),g=n.yy.getActors(),m=n.yy.getActorKeys(),y=n.yy.getMessages();e.exports.drawActors(p,g,m,0),i.insertArrowHead(p),i.insertArrowCrossHead(p),y.forEach(function(t){var e;switch(t.type){case n.yy.LINETYPE.NOTE:r.bounds.bumpVerticalPos(u.boxMargin),h=g[t.from].x,d=g[t.to].x,t.placement===n.yy.PLACEMENT.RIGHTOF?c(p,h+(u.width+u.actorMargin)/2,r.bounds.getVerticalPos(),t):t.placement===n.yy.PLACEMENT.LEFTOF?c(p,h-(u.width+u.actorMargin)/2,r.bounds.getVerticalPos(),t):t.to===t.from?c(p,h,r.bounds.getVerticalPos(),t):(f=Math.abs(h-d)+u.actorMargin,c(p,(h+d+u.width-f)/2,r.bounds.getVerticalPos(),t,f));break;case n.yy.LINETYPE.LOOP_START:r.bounds.bumpVerticalPos(u.boxMargin),r.bounds.newLoop(t.message),r.bounds.bumpVerticalPos(u.boxMargin+u.boxTextMargin);break;case n.yy.LINETYPE.LOOP_END:e=r.bounds.endLoop(),i.drawLoop(p,e,"loop",u),r.bounds.bumpVerticalPos(u.boxMargin);break;case n.yy.LINETYPE.OPT_START:r.bounds.bumpVerticalPos(u.boxMargin),r.bounds.newLoop(t.message),r.bounds.bumpVerticalPos(u.boxMargin+u.boxTextMargin);break;case n.yy.LINETYPE.OPT_END:e=r.bounds.endLoop(),i.drawLoop(p,e,"opt",u),r.bounds.bumpVerticalPos(u.boxMargin);break;case n.yy.LINETYPE.ALT_START:r.bounds.bumpVerticalPos(u.boxMargin),r.bounds.newLoop(t.message),r.bounds.bumpVerticalPos(u.boxMargin+u.boxTextMargin);break;case n.yy.LINETYPE.ALT_ELSE:r.bounds.bumpVerticalPos(u.boxMargin),e=r.bounds.addElseToLoop(t.message),r.bounds.bumpVerticalPos(u.boxMargin);break;case n.yy.LINETYPE.ALT_END:e=r.bounds.endLoop(),i.drawLoop(p,e,"alt",u),r.bounds.bumpVerticalPos(u.boxMargin);break;default:r.bounds.bumpVerticalPos(u.messageMargin),h=g[t.from].x+u.width/2,d=g[t.to].x+u.width/2,l(p,h,d,r.bounds.getVerticalPos(),t)}}),u.mirrorActors&&(r.bounds.bumpVerticalPos(2*u.boxMargin),e.exports.drawActors(p,g,m,r.bounds.getVerticalPos()));var v=r.bounds.getBounds();o.debug("For line height fix Querying: #"+s+" .actor-line");var b=a.selectAll("#"+s+" .actor-line");b.attr("y2",v.stopy);var _=v.stopy-v.starty+2*u.diagramMarginY;u.mirrorActors&&(_=_-u.boxMargin+u.bottomMarginAdj);var A=v.stopx-v.startx+2*u.diagramMarginX;u.useMaxWidth?(p.attr("height","100%"),p.attr("width","100%"),p.attr("style","max-width:"+A+"px;")):(p.attr("height",_),p.attr("width",A)),p.attr("viewBox",v.startx-u.diagramMarginX+" -"+u.diagramMarginY+" "+A+" "+_)}},{"../../d3":107,"../../logger":126,"./parser/sequenceDiagram":122,"./sequenceDb":123,"./svgDraw":125}],125:[function(t,e,r){"use strict";r.drawRect=function(t,e){var r=t.append("rect");return r.attr("x",e.x),r.attr("y",e.y),r.attr("fill",e.fill),r.attr("stroke",e.stroke),r.attr("width",e.width),r.attr("height",e.height),r.attr("rx",e.rx),r.attr("ry",e.ry),"undefined"!=typeof e["class"]&&r.attr("class",e["class"]),r},r.drawText=function(t,e,r){var n=e.text.replace(/<br\/?>/gi," "),i=t.append("text");i.attr("x",e.x),i.attr("y",e.y),i.style("text-anchor",e.anchor),i.attr("fill",e.fill),"undefined"!=typeof e["class"]&&i.attr("class",e["class"]);var a=i.append("tspan");return a.attr("x",e.x+2*e.textMargin),a.text(n),"undefined"!=typeof i.textwrap&&i.textwrap({x:e.x,y:e.y,width:r,height:1800},e.textMargin),i},r.drawLabel=function(t,e){var n=r.getNoteRect();n.x=e.x,n.y=e.y,n.width=50,n.height=20,n.fill="#526e52",n.stroke="none",n["class"]="labelBox",r.drawRect(t,n),e.y=e.y+e.labelMargin,e.x=e.x+.5*e.labelMargin,e.fill="white",r.drawText(t,e)};var n=-1;r.drawActor=function(t,e,i,a,s){var o=e+s.width/2,u=t.append("g");0===i&&(n++,u.append("line").attr("id","actor"+n).attr("x1",o).attr("y1",5).attr("x2",o).attr("y2",2e3).attr("class","actor-line").attr("stroke-width","0.5px").attr("stroke","#999"));var c=r.getNoteRect();c.x=e,c.y=i,c.fill="#eaeaea",c.width=s.width,c.height=s.height,c["class"]="actor",c.rx=3,c.ry=3,r.drawRect(u,c),u.append("text").attr("x",o).attr("y",i+s.height/2+5).attr("class","actor").style("text-anchor","middle").text(a)},r.drawLoop=function(t,e,n,i){var a=t.append("g"),s=function(t,e,r,n){a.append("line").attr("x1",t).attr("y1",e).attr("x2",r).attr("y2",n).attr("stroke-width",2).attr("stroke","#526e52").attr("class","loopLine")};s(e.startx,e.starty,e.stopx,e.starty),s(e.stopx,e.starty,e.stopx,e.stopy),s(e.startx,e.stopy,e.stopx,e.stopy),s(e.startx,e.starty,e.startx,e.stopy),"undefined"!=typeof e.elsey&&s(e.startx,e.elsey,e.stopx,e.elsey);var o=r.getTextObj();o.text=n,o.x=e.startx,o.y=e.starty,o.labelMargin=1.5*i.boxMargin,o["class"]="labelText",o.fill="white",r.drawLabel(a,o),o=r.getTextObj(),o.text="[ "+e.title+" ]",o.x=e.startx+(e.stopx-e.startx)/2,o.y=e.starty+1.5*i.boxMargin,o.anchor="middle",o["class"]="loopText",r.drawText(a,o),"undefined"!=typeof e.elseText&&(o.text="[ "+e.elseText+" ]",o.y=e.elsey+1.5*i.boxMargin,r.drawText(a,o))},r.insertArrowHead=function(t){t.append("defs").append("marker").attr("id","arrowhead").attr("refX",5).attr("refY",2).attr("markerWidth",6).attr("markerHeight",4).attr("orient","auto").append("path").attr("d","M 0,0 V 4 L6,2 Z")},r.insertArrowCrossHead=function(t){var e=t.append("defs"),r=e.append("marker").attr("id","crosshead").attr("markerWidth",15).attr("markerHeight",8).attr("orient","auto").attr("refX",16).attr("refY",4);r.append("path").attr("fill","black").attr("stroke","#000000").style("stroke-dasharray","0, 0").attr("stroke-width","1px").attr("d","M 9,2 V 6 L16,4 Z"),r.append("path").attr("fill","none").attr("stroke","#000000").style("stroke-dasharray","0, 0").attr("stroke-width","1px").attr("d","M 0,1 L 6,7 M 6,1 L 0,7")},r.getTextObj=function(){var t={x:0,y:0,fill:"black","text-anchor":"start",style:"#666",width:100,height:100,textMargin:0,rx:0,ry:0};return t},r.getNoteRect=function(){var t={x:0,y:0,fill:"#EDF2AE",stroke:"#666",width:100,anchor:"start",height:100,rx:0,ry:0};return t}},{}],126:[function(t,e,r){"use strict";function n(t){var e=t.getUTCHours(),r=t.getUTCMinutes(),n=t.getSeconds(),i=t.getMilliseconds();10>e&&(e="0"+e),10>r&&(r="0"+r),10>n&&(n="0"+n),100>i&&(i="0"+i),10>i&&(i="00"+i);var a=e+":"+r+":"+n+" ("+i+")";return a}function i(t){this.level=t,this.log=function(t,e){var r=this.level;return"undefined"==typeof r&&(r=s),e>=r&&"undefined"!=typeof console&&"undefined"!=typeof console.log?console.log("["+n(new Date)+"] "+t):void 0},this.trace=function(t){this.log(t,a.trace)},this.debug=function(t){this.log(t,a.debug)},this.info=function(t){this.log(t,a.info)},this.warn=function(t){this.log(t,a.warn)},this.error=function(t){this.log(t,a.error)}}var a={debug:1,info:2,warn:3,error:4,fatal:5,"default":5},s=a.error;r.setLogLevel=function(t){s=t},r.Log=i},{}],127:[function(t,e,r){(function(n){"use strict";var i=t("./logger"),a=new i.Log,s=t("./mermaidAPI"),o=0,u=t("he");e.exports.mermaidAPI=s;var c=function(){var t=s.getConfig();a.debug("Starting rendering diagrams");var e;arguments.length>=2?("undefined"!=typeof arguments[0]&&(n.mermaid.sequenceConfig=arguments[0]),e=arguments[1]):e=arguments[0];var r;"function"==typeof arguments[arguments.length-1]?(r=arguments[arguments.length-1],a.debug("Callback function found")):"undefined"!=typeof t.mermaid&&("function"==typeof t.mermaid.callback?(r=t.mermaid.callback,a.debug("Callback function found")):a.debug("No Callback function found")),e=void 0===e?document.querySelectorAll(".mermaid"):"string"==typeof e?document.querySelectorAll(e):e instanceof Node?[e]:e;var i;"undefined"!=typeof mermaid_config&&s.initialize(n.mermaid_config),a.debug("Start On Load before: "+n.mermaid.startOnLoad),"undefined"!=typeof n.mermaid.startOnLoad&&(a.debug("Start On Load inner: "+n.mermaid.startOnLoad),s.initialize({startOnLoad:n.mermaid.startOnLoad})),"undefined"!=typeof n.mermaid.ganttConfig&&s.initialize({gantt:n.mermaid.ganttConfig});var c,l=function(t,e){h.innerHTML=t,"undefined"!=typeof r&&r(d),e(h)};for(i=0;i<e.length;i++){var h=e[i];if(!h.getAttribute("data-processed")){h.setAttribute("data-processed",!0);var d="mermaidChart"+o++;c=h.innerHTML,c=u.decode(c).trim(),s.render(d,c,l,h)}}};r.init=c,r.parse=s.parse,r.version=function(){return"v"+t("../package.json").version},r.initialize=function(t){a.debug("Initializing mermaid"),"undefined"!=typeof t.mermaid&&("undefined"!=typeof t.mermaid.startOnLoad&&(n.mermaid.startOnLoad=t.mermaid.startOnLoad),"undefined"!=typeof t.mermaid.htmlLabels&&(n.mermaid.htmlLabels=t.mermaid.htmlLabels)),s.initialize(t)};var l=function(t,e){return"undefined"==typeof e?!1:t===e};n.mermaid={startOnLoad:!0,htmlLabels:!0,init:function(){c.apply(null,arguments)},initialize:function(t){r.initialize(t)},version:function(){return s.version()},parse:function(t){return s.parse(t)},parseError:function(t){a.debug("Mermaid Syntax 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diff --git a/_freeze/site_libs/profvis-0.3.6.9000/profvis.css b/_freeze/site_libs/profvis-0.3.6.9000/profvis.css
@@ -0,0 +1,696 @@
+.profvis {
+ position: relative;
+}
+
+.profvis * {
+ /* Need to disable box-sizing:border-box if enabled from other CSS (like
+ Bootstrap) */
+ -webkit-box-sizing: content-box;
+ -moz-box-sizing: content-box;
+ box-sizing: content-box;
+}
+
+.profvis-footer .info-label {
+ cursor: default;
+}
+
+.profvis-panel1 {
+ left: 0px;
+ top: 23px;
+ position: absolute;
+}
+
+.profvis-panel1-vertical {
+ bottom: 0px;
+ width: 500px;
+ margin-bottom: 20px;
+}
+
+.profvis-panel1-horizontal {
+ height: 378px;
+ right: 0px;
+}
+
+.profvis-panel2 {
+ position: absolute;
+ right: 0px;
+ bottom: 0px;
+}
+
+.profvis-panel2-vertical {
+ top: 23px;
+ left: 508px;
+ margin-bottom: 20px;
+}
+
+.profvis-panel2-horizontal {
+ left: 0px;
+ top: 408px;
+ margin-bottom: 20px;
+}
+
+.profvis-splitbar {
+ position: absolute;
+ background-color: rgb(224, 224, 224);
+ border-color: #ddd;
+ border-style: solid;
+ background-repeat: no-repeat;
+ background-position: center;
+}
+
+.profvis-splitbar-vertical {
+ cursor: col-resize;
+ left: 500px;
+ width: 8px;
+ top: 23px;
+ bottom: 0px;
+ border-width: 0 1px;
+ background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAMAAAAHCAYAAADNufepAAAACXBIWXMAAAsTAAALEwEAmpwYAAAKT2lDQ1BQaG90b3Nob3AgSUNDIHByb2ZpbGUAAHjanVNnVFPpFj333vRCS4iAlEtvUhUIIFJCi4AUkSYqIQkQSoghodkVUcERRUUEG8igiAOOjoCMFVEsDIoK2AfkIaKOg6OIisr74Xuja9a89+bN/rXXPues852zzwfACAyWSDNRNYAMqUIeEeCDx8TG4eQuQIEKJHAAEAizZCFz/SMBAPh+PDwrIsAHvgABeNMLCADATZvAMByH/w/qQplcAYCEAcB0kThLCIAUAEB6jkKmAEBGAYCdmCZTAKAEAGDLY2LjAFAtAGAnf+bTAICd+Jl7AQBblCEVAaCRACATZYhEAGg7AKzPVopFAFgwABRmS8Q5ANgtADBJV2ZIALC3AMDOEAuyAAgMADBRiIUpAAR7AGDIIyN4AISZABRG8lc88SuuEOcqAAB4mbI8uSQ5RYFbCC1xB1dXLh4ozkkXKxQ2YQJhmkAuwnmZGTKBNA/g88wAAKCRFRHgg/P9eM4Ors7ONo62Dl8t6r8G/yJiYuP+5c+rcEAAAOF0ftH+LC+zGoA7BoBt/qIl7gRoXgugdfeLZrIPQLUAoOnaV/Nw+H48PEWhkLnZ2eXk5NhKxEJbYcpXff5nwl/AV/1s+X48/Pf14L7iJIEyXYFHBPjgwsz0TKUcz5IJhGLc5o9H/LcL//wd0yLESWK5WCoU41EScY5EmozzMqUiiUKSKcUl0v9k4t8s+wM+3zUAsGo+AXuRLahdYwP2SycQWHTA4vcAAPK7b8HUKAgDgGiD4c93/+8//UegJQCAZkmScQAAXkQkLlTKsz/HCAAARKCBKrBBG/TBGCzABhzBBdzBC/xgNoRCJMTCQhBCCmSAHHJgKayCQiiGzbAdKmAv1EAdNMBRaIaTcA4uwlW4Dj1wD/phCJ7BKLyBCQRByAgTYSHaiAFiilgjjggXmYX4IcFIBBKLJCDJiBRRIkuRNUgxUopUIFVIHfI9cgI5h1xGupE7yAAygvyGvEcxlIGyUT3UDLVDuag3GoRGogvQZHQxmo8WoJvQcrQaPYw2oefQq2gP2o8+Q8cwwOgYBzPEbDAuxsNCsTgsCZNjy7EirAyrxhqwVqwDu4n1Y8+xdwQSgUXACTYEd0IgYR5BSFhMWE7YSKggHCQ0EdoJNwkDhFHCJyKTqEu0JroR+cQYYjIxh1hILCPWEo8TLxB7iEPENyQSiUMyJ7mQAkmxpFTSEtJG0m5SI+ksqZs0SBojk8naZGuyBzmULCAryIXkneTD5DPkG+Qh8lsKnWJAcaT4U+IoUspqShnlEOU05QZlmDJBVaOaUt2ooVQRNY9aQq2htlKvUYeoEzR1mjnNgxZJS6WtopXTGmgXaPdpr+h0uhHdlR5Ol9BX0svpR+iX6AP0dwwNhhWDx4hnKBmbGAcYZxl3GK+YTKYZ04sZx1QwNzHrmOeZD5lvVVgqtip8FZHKCpVKlSaVGyovVKmqpqreqgtV81XLVI+pXlN9rkZVM1PjqQnUlqtVqp1Q61MbU2epO6iHqmeob1Q/pH5Z/YkGWcNMw09DpFGgsV/jvMYgC2MZs3gsIWsNq4Z1gTXEJrHN2Xx2KruY/R27iz2qqaE5QzNKM1ezUvOUZj8H45hx+Jx0TgnnKKeX836K3hTvKeIpG6Y0TLkxZVxrqpaXllirSKtRq0frvTau7aedpr1Fu1n7gQ5Bx0onXCdHZ4/OBZ3nU9lT3acKpxZNPTr1ri6qa6UbobtEd79up+6Ynr5egJ5Mb6feeb3n+hx9L/1U/W36p/VHDFgGswwkBtsMzhg8xTVxbzwdL8fb8VFDXcNAQ6VhlWGX4YSRudE8o9VGjUYPjGnGXOMk423GbcajJgYmISZLTepN7ppSTbmmKaY7TDtMx83MzaLN1pk1mz0x1zLnm+eb15vft2BaeFostqi2uGVJsuRaplnutrxuhVo5WaVYVVpds0atna0l1rutu6cRp7lOk06rntZnw7Dxtsm2qbcZsOXYBtuutm22fWFnYhdnt8Wuw+6TvZN9un2N/T0HDYfZDqsdWh1+c7RyFDpWOt6azpzuP33F9JbpL2dYzxDP2DPjthPLKcRpnVOb00dnF2e5c4PziIuJS4LLLpc+Lpsbxt3IveRKdPVxXeF60vWdm7Obwu2o26/uNu5p7ofcn8w0nymeWTNz0MPIQ+BR5dE/C5+VMGvfrH5PQ0+BZ7XnIy9jL5FXrdewt6V3qvdh7xc+9j5yn+M+4zw33jLeWV/MN8C3yLfLT8Nvnl+F30N/I/9k/3r/0QCngCUBZwOJgUGBWwL7+Hp8Ib+OPzrbZfay2e1BjKC5QRVBj4KtguXBrSFoyOyQrSH355jOkc5pDoVQfujW0Adh5mGLw34MJ4WHhVeGP45wiFga0TGXNXfR3ENz30T6RJZE3ptnMU85ry1KNSo+qi5qPNo3ujS6P8YuZlnM1VidWElsSxw5LiquNm5svt/87fOH4p3iC+N7F5gvyF1weaHOwvSFpxapLhIsOpZATIhOOJTwQRAqqBaMJfITdyWOCnnCHcJnIi/RNtGI2ENcKh5O8kgqTXqS7JG8NXkkxTOlLOW5hCepkLxMDUzdmzqeFpp2IG0yPTq9MYOSkZBxQqohTZO2Z+pn5mZ2y6xlhbL+xW6Lty8elQfJa7OQrAVZLQq2QqboVFoo1yoHsmdlV2a/zYnKOZarnivN7cyzytuQN5zvn//tEsIS4ZK2pYZLVy0dWOa9rGo5sjxxedsK4xUFK4ZWBqw8uIq2Km3VT6vtV5eufr0mek1rgV7ByoLBtQFr6wtVCuWFfevc1+1dT1gvWd+1YfqGnRs+FYmKrhTbF5cVf9go3HjlG4dvyr+Z3JS0qavEuWTPZtJm6ebeLZ5bDpaql+aXDm4N2dq0Dd9WtO319kXbL5fNKNu7g7ZDuaO/PLi8ZafJzs07P1SkVPRU+lQ27tLdtWHX+G7R7ht7vPY07NXbW7z3/T7JvttVAVVN1WbVZftJ+7P3P66Jqun4lvttXa1ObXHtxwPSA/0HIw6217nU1R3SPVRSj9Yr60cOxx++/p3vdy0NNg1VjZzG4iNwRHnk6fcJ3/ceDTradox7rOEH0x92HWcdL2pCmvKaRptTmvtbYlu6T8w+0dbq3nr8R9sfD5w0PFl5SvNUyWna6YLTk2fyz4ydlZ19fi753GDborZ752PO32oPb++6EHTh0kX/i+c7vDvOXPK4dPKy2+UTV7hXmq86X23qdOo8/pPTT8e7nLuarrlca7nuer21e2b36RueN87d9L158Rb/1tWeOT3dvfN6b/fF9/XfFt1+cif9zsu72Xcn7q28T7xf9EDtQdlD3YfVP1v+3Njv3H9qwHeg89HcR/cGhYPP/pH1jw9DBY+Zj8uGDYbrnjg+OTniP3L96fynQ89kzyaeF/6i/suuFxYvfvjV69fO0ZjRoZfyl5O/bXyl/erA6xmv28bCxh6+yXgzMV70VvvtwXfcdx3vo98PT+R8IH8o/2j5sfVT0Kf7kxmTk/8EA5jz/GMzLdsAAAAgY0hSTQAAeiUAAICDAAD5/wAAgOkAAHUwAADqYAAAOpgAABdvkl/FRgAAADdJREFUeNpMi7ENADAIwwz/H8TEhMQz/JAupWqmyHGI7JoZIrscxMbBbhX+MMbTpG+x/UgCgzMA+a4RzyZ2yIIAAAAASUVORK5CYII=');
+}
+
+.profvis-splitbar-horizontal {
+ cursor: row-resize;
+ top: 400px;
+ height: 8px;
+ left: 0px;
+ right: 0px;
+ border-width: 0px 0;
+ background-image: url('data:image/png;base64,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');
+}
+
+.profvis-status-bar {
+ position: absolute;
+ padding: 0px 0px;
+ top: 0;
+ left: 0;
+ right: 0;
+ height: 22px;
+ line-height: 18px;
+ border-bottom: 1px solid rgb(196, 201, 204);
+ background-color: rgb(248, 249, 248);
+ color: #444;
+ font-family: "Lucida Sans", "DejaVu Sans", "Lucida Grande", "Segoe UI", Verdana, Helvetica, sans-serif;
+ font-size: 11px;
+ -webkit-user-select: none;
+ -moz-user-select: none;
+ -ms-user-select: none;
+ user-select: none;
+ overflow: hidden;
+}
+
+.profvis-footer {
+ position: absolute;
+ padding: 0px 0px;
+ bottom: 0px;
+ left: 0;
+ right: 0;
+ height: 19px;
+ line-height: 18px;
+ border-top: 1px solid rgb(196, 201, 204);
+ background-color: rgb(248, 249, 248);
+ color: #444;
+ font-family: "Lucida Sans", "DejaVu Sans", "Lucida Grande", "Segoe UI", Verdana, Helvetica, sans-serif;
+ font-size: 11px;
+ -webkit-user-select: none;
+ -moz-user-select: none;
+ -ms-user-select: none;
+ user-select: none;
+ overflow: hidden;
+}
+
+.profvis-status-bar .info-block {
+ display: inline-block;
+ vertical-align: top;
+ width: 140px;
+ padding: 2px 11px 2px 11px;
+}
+
+.profvis-footer .info-block {
+ display: inline-block;
+ vertical-align: top;
+ padding: 1px 11px 1px 11px;
+}
+
+.profvis-footer .info-block-right {
+ display: inline-block;
+ vertical-align: top;
+ padding: 1px 11px 1px 11px;
+ float: right;
+}
+
+.profvis-status-bar .result-block {
+ width: auto;
+ cursor: pointer;
+}
+
+.profvis-status-bar .result-block-active {
+ width: auto;
+ background: rgb(227, 229, 230);
+}
+
+.profvis-status-bar .spacing-block {
+ display: inline-block;
+ width: 25px;
+}
+
+.profvis-status-bar .separator-block {
+ display: inline-block;
+ width: 1px;
+ text-align: center;
+}
+
+.profvis-status-bar .separator-block .separator-image {
+ width: 2px;
+ height: 26px;
+ margin-top: -2px;
+}
+
+.profvis-status-bar .options-button {
+ float: right;
+ color: #444;
+ text-decoration: none;
+ cursor: pointer;
+ padding: 2px 11px 2px 11px;
+}
+
+
+.profvis-options-panel {
+ float: left;
+ position: absolute;
+ right: 0;
+ top: 21px;
+ padding: 3px 6px;
+ border: 1px solid #999;
+ background-color: #fff;
+ font-family: "Lucida Sans", "DejaVu Sans", "Lucida Grande", "Segoe UI", Verdana, Helvetica, sans-serif;
+ font-size: 11px;
+ line-height: 170%;
+ -webkit-user-select: none;
+ -moz-user-select: none;
+ -ms-user-select: none;
+ user-select: none;
+ cursor: pointer;
+}
+
+.profvis-code {
+ position: absolute;
+ top: 0px;
+ left: 0;
+ bottom: 0;
+ right: 0;
+ overflow-y: auto;
+ border: 0px solid #ddd;
+}
+
+.profvis-flamegraph {
+ position: absolute;
+ right: 0;
+ top: 0;
+ bottom: 0;
+ left: 0;
+ overflow: hidden;
+ border: 0px solid #ddd;
+ background: rgb(249, 249, 250);
+}
+
+table.profvis-table {
+ border-collapse: collapse;
+ font-family: "Lucida Sans", "DejaVu Sans", "Lucida Grande", "Segoe UI", Verdana, Helvetica, sans-serif;
+ font-size: 11px;
+ width: 100%;
+ text-align: left;
+ cursor: default;
+}
+
+table.profvis-table th {
+ background-color: rgb(249, 249, 250);
+ width: 14%;
+}
+
+table.profvis-table th.spacing {
+ width: 20px;
+}
+
+table.profvis-table th.filename {
+ font-family: monospace;
+ padding-left: 10px;
+ width: auto;
+}
+
+table.profvis-table th.percent {
+ text-align: center;
+}
+
+table.profvis-table tr {
+ border-top: 1px solid transparent;
+ border-bottom: 1px solid transparent;
+ vertical-align: top;
+}
+
+/* Need to use td for locked cells, so that the border color overrides the
+ border color from the row above. */
+table.profvis-table tr.locked > td {
+ border-top: 1px solid #444;
+ border-bottom: 1px solid #444;
+}
+
+table.profvis-table tr > td {
+ padding-top: 0;
+ padding-bottom: 0;
+}
+
+table.profvis-table tr.active {
+ background-color: #fdb;
+}
+
+table.profvis-table .linenum {
+ color: #aaa;
+ padding: 0 15px;
+ font-family: monospace;
+ width: 25px;
+}
+
+/* For unselectable and uncopyable text elements in table */
+table.profvis-table [data-pseudo-content]::before {
+ content: attr(data-pseudo-content);
+}
+
+table.profvis-table .code {
+ white-space: pre-wrap;
+ margin: 0;
+ min-height: 1.25em;
+ line-height: 1.25;
+ width: auto;
+ font-family: monospace;
+ background: transparent;
+}
+
+
+table.profvis-table .time, table.profvis-table .percent {
+ padding: 0 5px;
+ text-align: right;
+
+ min-width: 2em;
+ max-width: 2em;
+ overflow: hidden;
+
+ padding-right: 10px;
+}
+
+table.profvis-table .memory {
+ padding-right: 5px;
+}
+
+table.profvis-table th.time {
+ text-align: center;
+}
+
+table.profvis-table .memory {
+ padding: 0 5px;
+ text-align: right;
+
+ min-width: 2em;
+ max-width: 4em;
+ overflow: hidden;
+
+ padding-right: 10px;
+}
+
+table.profvis-table .memory-right {
+ text-align: left;
+}
+
+table.profvis-table th.memory {
+ text-align: center;
+}
+
+table.profvis-table .timebar-cell {
+ padding-left: 0;
+ border-left: 1px solid #444;
+ min-width: 3em;
+ width: 3em;
+}
+
+table.profvis-table .timebar-cell > .timebar {
+ background-color: #5A5A5A;
+ border-radius: 0px 2px 2px 0px;
+ line-height: 15px;
+}
+
+table.profvis-table .membar-left-cell {
+ padding-left: 0;
+ padding-right: 0;
+ border-left: 0px solid black;
+ min-width: 0.5em;
+ width: 0.5em;
+}
+
+table.profvis-table .membar-left-cell > .membar {
+ background-color: #A7A7A7;
+ float: right;
+ border-radius: 2px 0px 0px 2px;
+ line-height: 15px;
+}
+
+table.profvis-table .membar-right-cell {
+ padding-left: 0;
+ border-left: 1px solid black;
+ min-width: 1em;
+ width: 1em;
+}
+
+table.profvis-table .membar-right-cell > .membar {
+ background-color: #5A5A5A;
+ border-radius: 0px 2px 2px 0px;
+ line-height: 15px;
+}
+
+.profvis-flamegraph .background {
+ fill: rgb(249, 249, 250);
+}
+
+.profvis-flamegraph .cell .rect {
+ stroke: #000;
+ stroke-width: 0.25px;
+ fill: #fff;
+}
+
+.profvis-flamegraph .cell.active .rect {
+ stroke-width: 0.75px;
+ fill: #ddd;
+}
+
+.profvis-flamegraph .cell.highlighted .rect {
+ fill: #ffc;
+}
+
+.profvis-flamegraph .cell.highlighted.active .rect {
+ fill: #fdb;
+}
+
+.profvis-flamegraph .cell.output .rect {
+ fill: #eef;
+}
+
+.profvis-flamegraph .cell.gc .rect {
+ fill: #ccc;
+}
+
+.profvis-flamegraph .cell.stacktrace .rect {
+ fill: #eee;
+}
+.profvis-flamegraph .cell.stacktrace .profvis-label {
+ fill: #666;
+}
+
+.profvis-flamegraph .cell.locked {
+ font-weight: bold;
+}
+
+.profvis-flamegraph .cell.locked .rect {
+ stroke-width: 2px;
+}
+
+.profvis-flamegraph .cell .profvis-label {
+ font-family: monospace;
+ font-size: 11px;
+ cursor: default;
+}
+
+
+.profvis-flamegraph .axis text {
+ font: 10px sans-serif;
+}
+
+.profvis-flamegraph .axis path,
+.profvis-flamegraph .axis line {
+ fill: none;
+ stroke: #000;
+ shape-rendering: crispEdges;
+}
+
+
+.profvis-flamegraph .profvis-tooltip rect {
+ fill: rgb(249, 249, 250);
+ stroke: #000;
+ opacity: 0.75;
+ stroke-opacity: 0.75;
+ stroke-width: 0.5;
+}
+
+.profvis-flamegraph .profvis-tooltip text {
+ text-anchor: middle;
+ font-family: monospace;
+ font-size: 11px;
+}
+
+.profvis-infobox {
+ position: absolute;
+ left: 8px;
+ top: 8px;
+ opacity: 0.8;
+ border-radius: 3px;
+ color: #f8f8f8;
+ background-color: #333;
+ padding: 5px 10px;
+ font-family: "Lucida Sans", "DejaVu Sans", "Lucida Grande", "Segoe UI", Verdana, Helvetica, sans-serif;
+ font-size: 11px;
+ line-height: 100%;
+ pointer-events: none;
+ min-width: 280px;
+}
+
+.profvis-infobox table {
+ border-collapse: separate;
+ border-spacing: 2px;
+}
+
+
+.profvis-infobox table td {
+ padding: 1px;
+}
+
+.profvis-infobox .infobox-title {
+ font-weight: bold;
+}
+
+.profvis-message {
+ width: 100%;
+ height: 100%;
+ display: -ms-flexbox;
+ display: -webkit-flex;
+ display: flex;
+ -ms-flex-pack: center;
+ -webkit-justify-content: center;
+ justify-content: center;
+ -ms-flex-align: center;
+ -webkit-align-items: center;
+ align-items: center;
+ font-family: "Lucida Sans", "DejaVu Sans", "Lucida Grande", "Segoe UI", Verdana, Helvetica, sans-serif;
+ font-size: 11px;
+}
+
+.profvis-message div {
+ color: #444;
+ height: 25%;
+}
+
+.profvis-treetable {
+ top: 0px;
+ bottom: 0px;
+ left: 0px;
+ right: 0px;
+ position: absolute;
+ margin-top: 23px;
+ margin-bottom: 21px;
+ margin-right: 0px;
+ overflow: hidden;
+ font: 10px sans-serif;
+ color: #161616;
+ font-family: "Lucida Sans", "DejaVu Sans", "Lucida Grande", "Segoe UI", Verdana, Helvetica, sans-serif;
+ font-size: 11px;
+ overflow-y: auto;
+}
+
+.profvis-treetable .results {
+ width: 100%;
+ table-layout: fixed;
+}
+
+.profvis-treetable th {
+ font-weight: normal;
+ height: 18px;
+ background-color: #F8F9F8;
+ border-bottom: solid 1px #E4E4E4;
+ border-right: solid 1px #E4E4E4;
+ padding-left: 3px;
+ padding-right: 3px;
+}
+
+.profvis-treetable td {
+ height: 18px;
+ border-bottom: solid 1px #E4E4E4;
+ border-right: solid 1px #E4E4E4;
+ padding-left: 3px;
+ padding-right: 3px;
+ overflow: hidden;
+ text-overflow: ellipsis;
+}
+
+.profvis-treetable .action {
+ width: 18px;
+}
+
+.profvis-treetable .memory {
+ width: 100px;
+ text-align: right;
+}
+
+.profvis-treetable th {
+ cursor: default;
+ -webkit-user-select: none;
+ -moz-user-select: none;
+ -ms-user-select: none;
+ user-select: none;
+ overflow: hidden;
+}
+
+.profvis-treetable th.memory {
+ text-align: center;
+}
+
+.profvis-treetable .time {
+ width: 100px;
+ text-align: right;
+}
+
+.profvis-treetable th.time {
+ text-align: center;
+}
+
+.profvis-treetable .count {
+ text-align: right;
+}
+
+.profvis-treetable th.count {
+ text-align: center;
+}
+
+.profvis-treetable th.code-label {
+ text-align: left;
+ padding-left: 5px;
+}
+
+.profvis-treetable td.label-pointer {
+ cursor: pointer;
+}
+
+.profvis-treetable .label-text {
+ display: inline-block;
+ -webkit-user-select: none;
+ -khtml-user-select: none;
+ -moz-user-select: none;
+ -ms-user-select: none;
+ user-select: none;
+}
+
+.profvis-treetable .path {
+ text-align: left;
+}
+
+.profvis-treetable .treetable-expand > div {
+ display: inline-block;
+ width: 15px;
+}
+
+.profvis-treetable .treetable-expand > div > div{
+ width: 0px;
+ height: 0px;
+ margin-left: 3px;
+ margin-right: 6px;
+ border-top: 4px solid transparent;
+ border-left: 6px solid #161616;
+ border-bottom: 4px solid transparent;
+}
+
+.profvis-treetable .treetable-collapse > div {
+ display: inline-block;
+ width: 15px;
+}
+
+.profvis-treetable .treetable-collapse > div > div {
+ width: 0px;
+ height: 0px;
+ margin-left: 3px;
+ margin-right: 6px;
+ border-right: 4px solid transparent;
+ border-top: 6px solid #161616;
+ border-left: 4px solid transparent;
+ display: inline-block;
+}
+
+.profvis-treetable .time-info {
+ padding: 0px;
+ padding-right: 2px;
+ text-align: right;
+}
+
+.profvis-treetable .timebar {
+ width: 0px;
+ height: 14px;
+ background-color: #5A5A5A;
+ float: left;
+ border-radius: 2px 2px 2px 2px;
+ padding-top: 0px;
+ margin-top: 1px;
+}
+
+.profvis-treetable .timecell {
+ padding-top: 2px;
+ padding-right: 3px;
+}
+
+.profvis-treetable .memory-info {
+ padding-left: 0px;
+ padding-right: 2px;
+ text-align: right;
+}
+
+.profvis-treetable .memory-info-right {
+ padding-left: 2px;
+ padding-right: 0px;
+ text-align: left;
+}
+
+.profvis-treetable .memory-leftbar-wrapper {
+ float: left;
+ height: 14px;
+ width: 5px;
+}
+
+.profvis-treetable .memory-leftbar {
+ width: 2px;
+ height: 14px;
+ background-color: #A7A7A7;
+ float: right;
+ border-radius: 1px 0px 0px 1px;
+}
+
+.profvis-treetable .memory-rightbar {
+ width: 2px;
+ float: left;
+ height: 14px;
+ background-color: #5A5A5A;
+ border-radius: 0px 1px 1px 0px;
+}
+
+.profvis-treetable .memory-cell {
+}
+
+.profvis-treetable .memory-bar-container {
+ margin-right: 3px;
+}
+
+.profvis-treetable .time-bar-container {
+ margin-right: 3px;
+}
diff --git a/_freeze/site_libs/profvis-0.3.6.9000/profvis.js b/_freeze/site_libs/profvis-0.3.6.9000/profvis.js
@@ -0,0 +1,2656 @@
+/*jshint
+ undef:true,
+ browser:true,
+ devel: true,
+ jquery:true,
+ strict:false,
+ curly:false,
+ indent:2
+*/
+/*global profvis:true, d3, hljs */
+
+profvis = (function() {
+ var profvis = {};
+
+ profvis.render = function(el, message) {
+
+ function generateStatusBarButton(id, caption, active) {
+ var spacerImage = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAAUCAYAAACnOeyiAAAAXklEQVR42mNgAIL///8zMYSGhjIDGYIMIiIMvECGMwMDN4M4kFEDUqIIZKwDMdSBjAsghj6Q8QPEMAAy/lOBoQekv4AYKkDGfgZeXl4RICOLQUtLiw3IUAJJMQIZ7AC2tU2tXJxOYgAAAABJRU5ErkJggg==';
+
+ var buttonHtml =
+ '<div id="' + id + '" class="info-block ' +
+ (active ? 'result-block-active' : 'result-block') +
+ '"><span class="info-label">' + caption + '</span></div>' +
+ '<div class="separator-block"><img class="separator-image" src="' + spacerImage + '"></div>';
+
+ return buttonHtml;
+ }
+
+ function generateStatusBar(el, onToogle) {
+ var $el = $(el);
+
+ el.innerHTML =
+ generateStatusBarButton('flameGraphButton', 'Flame Graph', true) +
+ generateStatusBarButton('treetableButton', 'Data', false) +
+ '<span role="button" class="options-button">Options ▾</span>';
+
+ $el.find("span.options-button").on("click", function(e) {
+ e.preventDefault();
+ e.stopPropagation();
+
+ vis.optionsPanel.toggleVisibility();
+ });
+
+ var setStatusBarButtons = function(e) {
+ $(".info-block").removeClass("result-block-active");
+ $(".info-block").addClass("result-block");
+ e.addClass("result-block-active");
+ };
+
+ $el.find("#flameGraphButton").on("click", function() {
+ setStatusBarButtons($(this));
+ onToogle("flamegraph");
+ });
+
+ $el.find("#treetableButton").on("click", function() {
+ setStatusBarButtons($(this));
+ onToogle("treetable");
+ });
+
+ return {
+ el: el
+ };
+ }
+
+ function generateFooter(el, onToogle) {
+ var $el = $(el);
+
+ el.innerHTML =
+ '<div class="info-block"><span class="info-label">Sample Interval: ' +
+ vis.interval + 'ms</span></div>' +
+ '<div class="info-block-right">' +
+ // '<span class="info-label" title="Peak memory allocation">' + (Math.round(vis.totalMem * 100) / 100) + 'MB</span>' +
+ // ' / ' +
+ '<span class="info-label" title="Total time">' + vis.totalTime + 'ms</span>' +
+ '</div>';
+
+ return {
+ el: el
+ };
+ }
+
+ function generateOptionsPanel(el, onOptionsChange) {
+ var $el = $(el);
+
+ el.innerHTML =
+ '<div role="button" class="split-horizontal">' +
+ '<span class="options-checkbox" data-checked="1">' +
+ (vis.splitDir === "h" ? '☒' : '☐') +
+ '</span> Split horizontally' +
+ '</div>' +
+ '<div role="button" class="hide-internal">' +
+ '<span class="options-checkbox" data-checked="1">☒</span> Hide internal function calls' +
+ '</div>' +
+ '<div role="button" class="hide-zero-row">' +
+ '<span class="options-checkbox" data-checked="0">☐</span> Hide lines of code with zero time' +
+ '</div>' +
+ '<div role="button" class="hide-memory">' +
+ '<span class="options-checkbox" data-checked="0">☐</span> Hide memory results' +
+ '</div>';
+
+ // Toggle the appearance of a checkbox and return the new checked state.
+ function toggleCheckbox($checkbox) {
+ // Use attr() instead of data(), because the latter tries to coerce to
+ // numbers, which complicates our comparisons.
+ var checked = $checkbox.attr("data-checked");
+
+ if (checked === "0") {
+ $checkbox.attr("data-checked", "1");
+ $checkbox.html("☒");
+ return true;
+
+ } else {
+ $checkbox.attr("data-checked", "0");
+ $checkbox.html("☐");
+ return false;
+ }
+ }
+
+ $el.find(".split-horizontal")
+ .on("click", function() {
+ var checked = toggleCheckbox($(this).find(".options-checkbox"));
+ onOptionsChange("split", checked);
+ });
+
+ $el.find(".hide-internal")
+ .on("click", function() {
+ var checked = toggleCheckbox($(this).find(".options-checkbox"));
+ onOptionsChange("internals", checked);
+ });
+
+ $el.find(".hide-memory")
+ .on("click", function() {
+ var checked = toggleCheckbox($(this).find(".options-checkbox"));
+ onOptionsChange("memory", checked);
+ });
+
+ // Make the "hide internal" option available or unavailable to users
+ function enableHideInternal() {
+ $el.find(".hide-internal").css("display", "");
+ }
+ function disableHideInternal() {
+ $el.find(".hide-internal").css("display", "none");
+ }
+ // By default, start with it unavailable; it's only relevant for Shiny
+ // apps.
+ disableHideInternal();
+
+
+ $el.find(".hide-zero-row")
+ .on("click", function() {
+ var checked = toggleCheckbox($(this).find(".options-checkbox"));
+
+ if (checked) {
+ vis.codeTable.hideZeroTimeRows();
+ } else {
+ vis.codeTable.showZeroTimeRows();
+ }
+ });
+
+ el.style.visibility = "hidden";
+ function toggleVisibility(offset) {
+ if (el.style.visibility === "visible") {
+ el.style.visibility = "hidden";
+ } else {
+ el.style.visibility = "visible";
+ $(document).on("click", hideOnClickOutside);
+ }
+ }
+
+ // Hide the panel when a click happens outside. This handler also removes
+ // itself after it fires.
+ function hideOnClickOutside(e) {
+ var $el = $(el);
+ if (!$el.is(e.target) && $el.has(e.target).length === 0) {
+ el.style.visibility = "hidden";
+ // Unregister this event listener
+ $(document).off("click", hideOnClickOutside);
+ }
+ }
+
+ return {
+ el: el,
+ toggleVisibility: toggleVisibility,
+ enableHideInternal: enableHideInternal,
+ disableHideInternal: disableHideInternal
+ };
+ }
+
+ function notifySourceFileMessage(d, details) {
+ if (window.parent.postMessage) {
+ window.parent.postMessage({
+ source: "profvis",
+ message: "sourcefile",
+ file: d.filename,
+ normpath: d.normpath ? d.normpath : getNormPath(vis.files, d.filename),
+ line: d.linenum,
+ details: details
+ }, window.location.origin);
+ }
+ }
+
+ function roundOneDecimalNum(number, decimals) {
+ return Math.round(number * 10) / 10;
+ }
+
+ function roundOneDecimal(number, decimals) {
+ if (!number) return 0;
+ return roundOneDecimalNum(number).toFixed(1);
+ }
+
+ // Generate the code table ----------------------------------------
+ function generateCodeTable(el) {
+ var useMemory = false;
+ var content = d3.select(el);
+
+ if (vis.fileLineStats.length === 0) {
+ content.append("div")
+ .attr("class", "profvis-message")
+ .append("div")
+ .text("(Sources not available)");
+ }
+
+ // One table for each file
+ var tables = content.selectAll("table")
+ .data(vis.fileLineStats)
+ .enter()
+ .append("table")
+ .attr("class", "profvis-table");
+
+ // Table headers
+ var headerRows = tables.append("tr");
+ headerRows.append("th")
+ .attr("colspan", "2")
+ .attr("class", "filename")
+ .text(function(d) { return d.filename; });
+
+ var percentTooltip = "Percentage of tracked execution time";
+ var percentMemTooltip = "Percentage of peak memory deallocation and allocation";
+
+ headerRows.append("th")
+ .attr("class", "table-memory memory")
+ .attr("colspan", "4")
+ .text("Memory");
+
+ headerRows.append("th")
+ .attr("class", "time")
+ .attr("colspan", "2")
+ .text("Time");
+
+ headerRows.append("th")
+ .attr("class", "spacing")
+ .attr("data-pseudo-content", "\u00a0");
+
+ // Insert each line of code
+ var rows = tables.selectAll("tr.code-row")
+ .data(function(d) { return d.lineData; })
+ .enter()
+ .append("tr")
+ .attr("class", "code-row");
+
+ // Use pseudo-content and CSS content rule to make text unselectable and
+ // uncopyable. See https://danoc.me/blog/css-prevent-copy/
+ rows.append("td")
+ .attr("class", "linenum")
+ .attr("data-pseudo-content", function(d) { return d.linenum; });
+
+ rows.append("td")
+ .attr("class", "code r")
+ .text(function(d) { return d.content; })
+ .each(function() { hljs.highlightElement(this); });
+
+ rows.append("td")
+ .attr("class", "table-memory memory")
+ .attr("title", "Memory deallocation (MB)")
+ .attr("data-pseudo-content",
+ function(d) { return roundOneDecimalNum(d.sumMemDealloc) !== 0 ? roundOneDecimal(d.sumMemDealloc) : ""; });
+
+ rows.append("td")
+ .attr("class", "table-memory membar-left-cell")
+ .append("div")
+ .attr("class", "membar")
+ .attr("title", percentMemTooltip)
+ .style("width", function(d) {
+ var p = Math.min(Math.abs(Math.min(Math.round(d.propMemDealloc * 100), 0)), 100);
+
+ // 8% is the minimal size that looks visually appealing while drawing an almost empty bar
+ p = roundOneDecimalNum(d.sumMemDealloc) !== 0 ? Math.max(p, 8) : 0;
+ return p + "%";
+ })
+ // Add the equivalent of to be added with CSS content
+ .attr("data-pseudo-content", "\u00a0");
+
+ rows.append("td")
+ .attr("class", "table-memory membar-right-cell")
+ .append("div")
+ .attr("class", "membar")
+ .attr("title", percentMemTooltip)
+ .style("width", function(d) {
+ var p = Math.min(Math.max(Math.round(d.propMemAlloc * 100), 0), 100);
+
+ // 4% is the minimal size that looks visually appealing while drawing an almost empty bar
+ p = roundOneDecimalNum(d.sumMemAlloc) !== 0 ? Math.max(p, 4) : 0;
+ return p + "%";
+ })
+ // Add the equivalent of to be added with CSS content
+ .attr("data-pseudo-content", "\u00a0");
+
+ rows.append("td")
+ .attr("class", "table-memory memory memory-right")
+ .attr("title", "Memory allocation (MB)")
+ .attr("data-pseudo-content",
+ function(d) { return roundOneDecimalNum(d.sumMemAlloc) !== 0 ? roundOneDecimal(d.sumMemAlloc) : ""; });
+
+ rows.append("td")
+ .attr("class", "time")
+ .attr("title", "Total time (ms)")
+ .attr("data-pseudo-content",
+ function(d) { return Math.round(d.sumTime * 100) !== 0 ? (Math.round(d.sumTime * 100) / 100) : ""; });
+
+ rows.append("td")
+ .attr("class", "timebar-cell")
+ .append("div")
+ .attr("class", "timebar")
+ .attr("title", percentTooltip)
+ .style("width", function(d) {
+ return Math.round(d.propTime * 100) + "%";
+ })
+ // Add the equivalent of to be added with CSS content
+ .attr("data-pseudo-content", "\u00a0");
+
+ rows.append("td")
+ .attr("class", "spacing")
+ .attr("data-pseudo-content", "\u00a0");
+
+ rows
+ .on("click", function(d) {
+ // Info box is only relevant when mousing over flamegraph
+ vis.infoBox.hide();
+ highlighter.click(d);
+ notifySourceFileMessage(d, "select");
+ })
+ .on("mouseover", function(d) {
+ if (highlighter.isLocked()) return;
+
+ // Info box is only relevant when mousing over flamegraph
+ vis.infoBox.hide();
+ highlighter.hover(d);
+ })
+ .on("mouseout", function(d) {
+ if (highlighter.isLocked()) return;
+
+ highlighter.hover(null);
+ })
+ .on("dblclick", function(d) {
+ notifySourceFileMessage(d, "open");
+ });
+
+ function hideZeroTimeRows() {
+ rows
+ .filter(function(d) { return d.sumTime === 0; })
+ .style("display", "none");
+ }
+
+ function showZeroTimeRows() {
+ rows
+ .filter(function(d) { return d.sumTime === 0; })
+ .style("display", "");
+ }
+
+ function addLockHighlight(d) {
+ var target = d;
+ rows
+ .filter(function(d) { return d === target; } )
+ .classed({ locked: true });
+ }
+
+ function clearLockHighlight() {
+ rows
+ .filter(".locked")
+ .classed({ locked: false });
+ }
+
+ function addActiveHighlight(d) {
+ // If we have filename and linenum, search for cells that match, and
+ // set them as "active".
+ var target = d;
+ if (target.filename && target.linenum) {
+ var tr = rows
+ .filter(function(d) {
+ return d.linenum === target.linenum &&
+ d.filename === target.filename;
+ })
+ .classed({ active: true });
+
+ tr.node().scrollIntoViewIfNeeded();
+ }
+ }
+
+ function clearActiveHighlight() {
+ rows
+ .filter(".active")
+ .classed({ active: false });
+ }
+
+ function enableScroll() {
+ // TODO: implement this
+ }
+
+ function disableScroll() {
+ }
+
+ function useMemoryResults() {
+ d3.selectAll(".table-memory").style("display", vis.hideMemory ? "none" : "");
+ }
+
+ return {
+ el: el,
+ hideZeroTimeRows: hideZeroTimeRows,
+ showZeroTimeRows: showZeroTimeRows,
+ addLockHighlight: addLockHighlight,
+ clearLockHighlight: clearLockHighlight,
+ addActiveHighlight: addActiveHighlight,
+ clearActiveHighlight: clearActiveHighlight,
+ enableScroll: enableScroll,
+ disableScroll: disableScroll,
+ useMemoryResults: useMemoryResults
+ };
+ }
+
+
+ var highlighter = (function() {
+ // D3 data objects for the currently locked and active items
+ var lockItem = null;
+ var activeItem = null;
+
+ function isLocked() {
+ return lockItem !== null;
+ }
+
+ function currentLock() {
+ return lockItem;
+ }
+
+ function currentActive() {
+ return activeItem;
+ }
+
+
+ // This is called when a flamegraph cell or a line of code is clicked on.
+ // Clicks also should trigger hover events.
+ function click(d) {
+ // If d is null (background is clicked), or if locked and this click
+ // is on the currently locked selection, just unlock and return.
+ if (d === null || (lockItem && d === lockItem)) {
+ lockItem = null;
+ vis.flameGraph.clearLockHighlight();
+ vis.codeTable.clearLockHighlight();
+ return;
+ }
+
+ // If nothing currently locked, or if locked and this click is on
+ // something other than the currently locked selection, then lock the
+ // current selection.
+ lockItem = d;
+
+ vis.flameGraph.clearLockHighlight();
+ vis.codeTable.clearLockHighlight();
+ hover(null);
+
+ vis.flameGraph.addLockHighlight(d);
+ vis.codeTable.addLockHighlight(d);
+ hover(d);
+ }
+
+
+ function hover(d) {
+ activeItem = d;
+
+ if (activeItem) {
+ vis.flameGraph.addActiveHighlight(activeItem);
+ vis.codeTable.addActiveHighlight(activeItem);
+ return;
+ }
+
+ vis.flameGraph.clearActiveHighlight();
+ vis.codeTable.clearActiveHighlight();
+ }
+
+ return {
+ isLocked: isLocked,
+ currentLock: currentLock,
+ currentActive: currentActive,
+
+ click: click,
+ hover: hover
+ };
+ })();
+
+
+ // Generate the flame graph -----------------------------------------------
+ function generateFlameGraph(el) {
+ el.innerHTML = "";
+
+ var stackHeight = 15; // Height of each layer on the stack, in pixels
+ var zoomMargin = 0.02; // Extra margin on sides when zooming to fit
+
+ // Dimensions -----------------------------------------------------------
+
+ // Margin inside the svg where the plotting occurs
+ var dims = {
+ margin: { top: 0, right: 0, left: 0, bottom: 30 }
+ };
+ dims.width = el.clientWidth - dims.margin.left - dims.margin.right;
+ dims.height = el.clientHeight - dims.margin.top - dims.margin.bottom;
+
+ var domains = {
+ x: [
+ d3.min(vis.prof, function(d) { return d.startTime; }),
+ d3.max(vis.prof, function(d) { return d.endTime; })
+ ],
+ y: [
+ d3.min(vis.prof, function(d) { return d.depth; }) - 1,
+ d3.max(vis.prof, function(d) { return d.depth; })
+ ]
+ };
+ // Slightly expand x domain
+ domains.x = expandRange(domains.x, zoomMargin);
+
+ // Scales ---------------------------------------------------------------
+ var scales = {
+ x: d3.scale.linear()
+ .domain(domains.x)
+ .range([0, dims.width]),
+
+ y: d3.scale.linear()
+ .domain(domains.y)
+ .range([dims.height, dims.height - (domains.y[1] - domains.y[0]) * stackHeight]),
+
+ // This will be a function that, given a data point, returns the depth.
+ // This function can change; sometimes it returns the original depth,
+ // and sometimes it returns the collapsed depth. This isn't exactly a
+ // scale function, but it's close enough for our purposes.
+ getDepth: null
+ };
+
+ function useCollapsedDepth() {
+ scales.getDepth = function(d) { return d.depthCollapsed; };
+ }
+ function useUncollapsedDepth() {
+ scales.getDepth = function(d) { return d.depth; };
+ }
+
+ useCollapsedDepth();
+
+ // SVG container objects ------------------------------------------------
+ var svg = d3.select(el).append('svg');
+
+ var clipRect = svg.append("clipPath")
+ .attr("id", "clip-" + vis.el.id)
+ .append("rect");
+
+ var container = svg.append('g')
+ .attr("transform", "translate(" + dims.margin.left + "," + dims.margin.top + ")")
+ .attr("clip-path", "url(" + urlNoHash() + "#clip-" + vis.el.id + ")");
+
+ // Add a background rect so we have something to grab for zooming/panning
+ var backgroundRect = container.append("rect")
+ .attr("class", "background");
+
+ // Axes ------------------------------------------------------------
+ var xAxis = d3.svg.axis()
+ .scale(scales.x)
+ .orient("bottom");
+
+ svg.append("g")
+ .attr("class", "x axis")
+ .call(xAxis);
+
+ // Container sizing -----------------------------------------------------
+ // Update dimensions of various container elements, based on the overall
+ // dimensions of the containing div.
+ function updateContainerSize() {
+ dims.width = el.clientWidth - dims.margin.left - dims.margin.right;
+ dims.height = el.clientHeight - dims.margin.top - dims.margin.bottom;
+
+ svg
+ .attr('width', dims.width + dims.margin.left + dims.margin.right)
+ .attr('height', dims.height + dims.margin.top + dims.margin.bottom);
+
+ clipRect
+ .attr("x", dims.margin.left)
+ .attr("y", dims.margin.top)
+ .attr("width", dims.width)
+ .attr("height", dims.height);
+
+ backgroundRect
+ .attr("width", dims.width)
+ .attr("height", dims.height);
+
+ svg.select(".x.axis")
+ .attr("transform", "translate(" + dims.margin.left + "," + dims.height + ")");
+ }
+
+
+ // Redrawing ------------------------------------------------------------
+
+ // Redrawing is a little complicated. For performance reasons, the
+ // flamegraph cells that are offscreen aren't rendered; they're removed
+ // from the D3 selection of cells. However, when transitions are
+ // involved, it may be necssary to add objects in their correct
+ // off-screen starting locations before the transition, and then do the
+ // transition. Similarly, it may be necssary to transition objects to
+ // their correct off-screen ending positions.
+ //
+ // In order to handle this, whenever there's a transition, we need to
+ // have the scales for before the transition, and after. When a function
+ // invokes a transition, it will generally do the following: (1) save the
+ // previous scales, (2) modify the current scales, (3) call a redraw
+ // function. The redraw functions are customized for different types of
+ // transitions, and they will use the saved previous scales to position
+ // objects correctly for the transition. When there's no transition, the
+ // previous scales aren't needed, and the redrawImmediate() function
+ // should be used.
+
+ // Cache cells for faster access (avoid a d3.select())
+ var cells;
+
+ // For a data element, return identifying key
+ function dataKey(d) {
+ return d.depth + "-" + d.startTime + "-" + d.endTime;
+ }
+
+ // For transitions with animation, we need to have a copy of the previous
+ // scales in addition to the current ones.
+ var prevScales = {};
+ function savePrevScales() {
+ prevScales = {
+ x: scales.x.copy(),
+ y: scales.y.copy(),
+ getDepth: scales.getDepth
+ };
+ }
+ savePrevScales();
+
+
+ // Returns a D3 selection of the cells that are within the plotting
+ // region, using a set of scales.
+ function selectActiveCells(scales) {
+ var xScale = scales.x;
+ var yScale = scales.y;
+ var depth = scales.getDepth;
+ var width = dims.width;
+ var height = dims.height;
+
+ var data = vis.prof.filter(function(d) {
+ var depthVal = depth(d);
+ return !(xScale(d.endTime) < 0 ||
+ xScale(d.startTime) > width ||
+ depthVal === null ||
+ yScale(depthVal - 1) < 0 ||
+ yScale(depthVal) > height);
+ });
+
+ cells = container.selectAll("g.cell").data(data, dataKey);
+
+ return cells;
+ }
+
+ // Given an enter selection, add the rect and text objects, but don't
+ // position them. Returns a selection of the new <g> elements.
+ // This should usually be called with addItems(sel.enter()) instead
+ // of sel.enter().call(addItems), because the latter returns the original
+ // enter selection, not the selection of <g> elements, and can't be
+ // used for chaining more function calls on the <g> selection.
+ function addItems(enterSelection) {
+ var cells = enterSelection.append("g")
+ .attr("class", "cell")
+ .classed("highlighted", function(d) { return d.filename !== null; })
+ .call(addMouseEventHandlers);
+
+ // Add CSS classes for highlighting cells with labels that match particular
+ // regex patterns.
+ var highlightPatterns = d3.entries(message.highlight);
+ highlightPatterns.map(function(item) {
+ var cssClass = item.key;
+ var regexp = new RegExp(item.value);
+
+ cells.classed(cssClass, function(d) {
+ return d.label.search(regexp) !== -1;
+ });
+ });
+
+ cells.append("rect")
+ .attr("class", "rect");
+
+ cells.append("text")
+ .attr("class", "profvis-label")
+ .text(function(d) { return d.label; });
+
+ return cells;
+ }
+
+ // Given a selection, position the rects and labels, using a set of
+ // scales.
+ function positionItems(cells, scales) {
+ var xScale = scales.x;
+ var yScale = scales.y;
+ var depth = scales.getDepth;
+
+ cells.select("rect")
+ .attr("width", function(d) {
+ return xScale(d.endTime) - xScale(d.startTime);
+ })
+ .attr("height", yScale(0) - yScale(1))
+ .attr("x", function(d) { return xScale(d.startTime); })
+ .attr("y", function(d) { return yScale(depth(d)); });
+
+ cells.select("text")
+ .attr("x", function(d) {
+ // To place the labels, check if there's enough space to fit the
+ // label plus padding in the rect. (We already know the label fits
+ // without padding if we got here.)
+ // * If there's not enough space, simply center the label in the
+ // rect.
+ // * If there is enough space, keep the label within the rect, with
+ // padding. Try to left-align, keeping the label within the
+ // viewing area if possible.
+
+ // Padding on left and right
+ var pad = 2;
+
+ var textWidth = getLabelWidth(this, d.label.length);
+ var rectWidth = xScale(d.endTime) - xScale(d.startTime);
+
+ if (textWidth + pad*2 > rectWidth) {
+ return xScale(d.startTime) + (rectWidth - textWidth) / 2;
+ } else {
+ return Math.min(
+ Math.max(0, xScale(d.startTime)) + pad,
+ xScale(d.endTime) - textWidth - pad
+ );
+ }
+ })
+ .attr("y", function(d) { return yScale(depth(d) - 0.8); });
+
+ return cells;
+ }
+
+
+ // Redraw without a transition (regular panning and zooming)
+ function redrawImmediate() {
+ cells = selectActiveCells(scales);
+
+ cells.exit().remove();
+ addItems(cells.enter())
+ .call(addLockHighlightSelection, highlighter.currentLock())
+ .call(addActiveHighlightSelection, highlighter.currentActive());
+ cells.call(positionItems, scales);
+ cells.select('text')
+ .call(updateLabelVisibility);
+ svg.select(".x.axis").call(xAxis);
+ }
+
+ // Redraw for double-click zooming, where there's a transition
+ function redrawZoom(duration) {
+ // Figure out if we're zooming in or out. This will determine when we
+ // recalculate the label visibility: before or after the transition.
+ var prevExtent = prevScales.x.domain()[1] - prevScales.x.domain()[0];
+ var curExtent = scales.x.domain()[1] - scales.x.domain()[0];
+ var zoomIn = curExtent < prevExtent;
+
+ cells = selectActiveCells(scales);
+
+ // Phase 1
+ // Add the enter items, highlight them, and position them using the
+ // previous scales
+ addItems(cells.enter())
+ .call(addLockHighlightSelection, highlighter.currentLock())
+ .call(addActiveHighlightSelection, highlighter.currentActive())
+ .call(positionItems, prevScales);
+
+ // If zooming out, update label visibility. This will hide some labels
+ // now, before the transition, ensuring that they will never be larger
+ // than the box.
+ if (!zoomIn) {
+ cells.select('text')
+ .call(updateLabelVisibility);
+ }
+
+ // Phase 2
+ // Position the update (and enter) items using the new scales
+ cells
+ .transition().duration(duration)
+ .call(positionItems, scales);
+
+ // Position the exit items using the new scales
+ cells.exit()
+ .transition().duration(duration)
+ .call(positionItems, scales);
+
+ // Update x axis
+ svg.select(".x.axis")
+ .transition().duration(duration)
+ .call(xAxis);
+
+ // Phase 3
+ // If zooming in, update label visibility. This will hide some labels
+ // now, after the transition, ensuring that they will never be larger
+ // than the box.
+ if (zoomIn) {
+ cells.select('text')
+ .transition().delay(duration)
+ .call(updateLabelVisibility);
+ }
+
+ // Remove the exit items
+ cells.exit()
+ .transition().delay(duration)
+ .remove();
+ }
+
+ // Redraw when internal functions are hidden
+ function redrawCollapse(exitDuration, updateDuration) {
+ cells = selectActiveCells(scales);
+
+ // There are two subsets of the exit items:
+ // 1. Those that exit because depth is null. These should fade out.
+ // 2. Those that exit because they move off screen. These should wait
+ // for subset 1 to fade out, then move with a transition.
+ var fadeOutCells = cells.exit()
+ .filter(function(d) { return scales.getDepth(d) === null; });
+ var moveOutCells = cells.exit()
+ .filter(function(d) { return scales.getDepth(d) !== null; });
+
+ // Phase 1
+ // Add the enter items, highlight them, and position them using the
+ // previous scales
+ addItems(cells.enter())
+ .call(addLockHighlightSelection, highlighter.currentLock())
+ .call(addActiveHighlightSelection, highlighter.currentActive())
+ .call(positionItems, prevScales);
+
+ cells.select('text')
+ .call(updateLabelVisibility);
+
+ // Phase 2
+ // Fade out the items that have a null depth
+ fadeOutCells
+ .transition().duration(exitDuration)
+ .style("opacity", 0);
+
+ // Phase 3
+ // Position the update (and enter) items using the new scales
+ cells
+ .transition().delay(exitDuration).duration(updateDuration)
+ .call(positionItems, scales);
+
+ // Position the exit items that move out, using the new scales
+ moveOutCells
+ .transition().delay(exitDuration).duration(updateDuration)
+ .call(positionItems, scales);
+
+ // Phase 4
+ // Remove all the exit items
+ cells.exit()
+ .transition().delay(exitDuration + updateDuration)
+ .remove();
+ }
+
+ // Redraw when internal functions are un-hidden
+ function redrawUncollapse(updateDuration, enterDuration) {
+ cells = selectActiveCells(scales);
+
+ var enterCells = addItems(cells.enter());
+ // There are two subsets of the enter items:
+ // 1. Those that enter because they move on screen (but the previous
+ // depth was not null). These should move with a transition.
+ // 2. Those that enter because the previous depth was null. These
+ // should wait for subset 1 to move, then fade in.
+ var moveInCells = enterCells
+ .filter(function(d) { return prevScales.getDepth(d) !== null; });
+ var fadeInCells = enterCells
+ .filter(function(d) { return prevScales.getDepth(d) === null; });
+
+ // Phase 1
+ // Highlight and position the move-in items with the old scales
+ moveInCells
+ .call(addLockHighlightSelection, highlighter.currentLock())
+ .call(addActiveHighlightSelection, highlighter.currentActive())
+ .call(positionItems, prevScales);
+
+ cells.select('text')
+ .call(updateLabelVisibility);
+
+ // Phase 2
+ // Position the move-in, update, and exit items with a transition
+ moveInCells
+ .transition().duration(updateDuration)
+ .call(positionItems, scales);
+ cells
+ .transition().duration(updateDuration)
+ .call(positionItems, scales);
+ cells.exit()
+ .transition().duration(updateDuration)
+ .call(positionItems, scales);
+
+ // Phase 3
+ // Highlight and position the fade-in items, then fade in
+ fadeInCells
+ .call(addLockHighlightSelection, highlighter.currentLock())
+ .call(addActiveHighlightSelection, highlighter.currentActive())
+ .call(positionItems, scales)
+ .style("opacity", 0)
+ .transition().delay(updateDuration).duration(enterDuration)
+ .style("opacity", 1);
+
+ // Phase 4
+ // Remove the exit items
+ cells.exit()
+ .transition().delay(updateDuration + enterDuration)
+ .remove();
+ }
+
+
+ // Calculate whether to display label in each cell ----------------------
+
+ // Finding the dimensions of SVG elements is expensive. We'll reduce the
+ // calls getBoundingClientRect() by caching the dimensions.
+
+ // Cache the width of labels. This is a lookup table which, given the
+ // number of characters, gives the number of pixels. The label width
+ // never changes, so we can keep it outside of updateLabelVisibility().
+ var labelWidthTable = {};
+ function getLabelWidth(el, nchar) {
+ // Add entry if it doesn't already exist
+ if (labelWidthTable[nchar] === undefined) {
+ // If the text isn't displayed, then we can't get its width. Make
+ // sure it's visible, get the width, and then restore original
+ // display state.
+ var oldDisplay = el.style.display;
+ el.style.display = "inline";
+ labelWidthTable[nchar] = el.getBoundingClientRect().width;
+ el.style.display = oldDisplay;
+ }
+ return labelWidthTable[nchar];
+ }
+
+ // Show labels that fit in the corresponding rectangle, and hide others.
+ function updateLabelVisibility(labels) {
+ // Cache the width of rects. This is a lookup table which, given the
+ // timespan (width in data), gives the number of pixels. The width of
+ // rects changes with the x scale, so we have to rebuild the table each
+ // time the scale changes.
+ var rectWidthTable = {};
+ var x0 = scales.x(0);
+ function getRectWidth(time) {
+ // Add entry if it doesn't already exist
+ if (rectWidthTable[time] === undefined) {
+ rectWidthTable[time] = scales.x(time) - x0;
+ }
+ return rectWidthTable[time];
+ }
+
+ // Now calculate text and rect width for each cell.
+ labels.style("display", function(d) {
+ var labelWidth = getLabelWidth(this, d.label.length);
+ var boxWidth = getRectWidth(d.endTime - d.startTime);
+
+ return (labelWidth <= boxWidth) ? "" : "none";
+ });
+
+ return labels;
+ }
+
+
+ function onResize() {
+ updateContainerSize();
+
+ scales.x.range([0, dims.width]);
+ zoom.x(scales.x);
+
+ // Preserve distance from bottom, instead of from top (which is the
+ // default behavior).
+ scales.y.range([
+ dims.height,
+ dims.height - (domains.y[1] - domains.y[0]) * stackHeight
+ ]);
+ redrawImmediate();
+ }
+
+ // Attach mouse event handlers ------------------------------------
+ var dragging = false;
+
+ function addMouseEventHandlers(cells) {
+ cells
+ .on("mouseup", function(d) {
+ if (dragging) return;
+
+ // If it wasn't a drag, treat it as a click
+ vis.infoBox.show(d);
+ highlighter.click(d);
+ notifySourceFileMessage(d, "select");
+ })
+ .on("mouseover", function(d) {
+ if (dragging) return;
+
+ // If no label currently shown, display a tooltip
+ var label = this.querySelector(".profvis-label");
+ if (label.style.display === "none") {
+ var box = this.getBBox();
+ showTooltip(
+ d.label,
+ box.x + box.width / 2,
+ box.y - box.height
+ );
+ }
+
+ if (!highlighter.isLocked()) {
+ vis.infoBox.show(d);
+ highlighter.hover(d);
+ }
+ })
+ .on("mouseout", function(d) {
+ if (dragging) return;
+
+ hideTooltip();
+
+ if (!highlighter.isLocked()) {
+ vis.infoBox.hide();
+ highlighter.hover(null);
+ }
+ })
+ .on("dblclick.zoomcell", function(d) {
+ // When a cell is double-clicked, zoom x to that cell's width.
+ savePrevScales();
+
+ scales.x.domain(expandRange([d.startTime, d.endTime], zoomMargin));
+ zoom.x(scales.x);
+
+ redrawZoom(250);
+
+ notifySourceFileMessage(d, "open");
+ });
+
+ return cells;
+ }
+
+ // Tooltip --------------------------------------------------------
+ function showTooltip(label, x, y) {
+ var tooltip = container.append("g").attr("class", "profvis-tooltip");
+ var tooltipRect = tooltip.append("rect");
+ var tooltipLabel = tooltip.append("text")
+ .text(label)
+ .attr("x", x)
+ .attr("y", y + stackHeight * 0.2); // Shift down slightly for baseline
+
+ // Add box around label
+ var labelBox = tooltipLabel.node().getBBox();
+ var rectWidth = labelBox.width + 10;
+ var rectHeight = labelBox.height + 4;
+ tooltipRect
+ .attr("width", rectWidth)
+ .attr("height", rectHeight)
+ .attr("x", x - rectWidth / 2)
+ .attr("y", y - rectHeight / 2)
+ .attr("rx", 4) // Rounded corners -- can't set this in CSS
+ .attr("ry", 4);
+ }
+
+ function hideTooltip() {
+ container.select("g.profvis-tooltip").remove();
+ }
+
+
+ // Highlighting ---------------------------------------------------------
+
+ function addLockHighlight(d) {
+ addLockHighlightSelection(cells, d);
+ }
+
+ function clearLockHighlight() {
+ cells
+ .filter(".locked")
+ .classed({ locked: false });
+ }
+
+
+ function addActiveHighlight(d) {
+ if (!d) return;
+ addActiveHighlightSelection(cells, d);
+ }
+
+ function clearActiveHighlight() {
+ cells
+ .filter(".active")
+ .classed({ active: false });
+ }
+
+ // These are versions of addLockHighlight and addActiveHighlight which
+ // are only internally visible. It must be passed a selection of cells to
+ // perform the highlighting on. This can be more efficient because it can
+ // operate on just an enter selection instead of all cells.
+ function addLockHighlightSelection(selection, d) {
+ if (!d) return;
+
+ var target = d;
+ selection
+ .filter(function(d) { return d === target; } )
+ .classed({ locked: true })
+ .call(moveToFront);
+ }
+
+ function addActiveHighlightSelection(selection, d) {
+ if (!d) return;
+
+ var target = d;
+ if (target.filename && target.linenum) {
+ selection
+ .filter(function(d) {
+ // Check for filename and linenum match, and if provided, a label match.
+ var match = d.filename === target.filename &&
+ d.linenum === target.linenum;
+ if (!!target.label) {
+ match = match && (d.label === target.label);
+ }
+ return match;
+ })
+ .classed({ active: true });
+
+ } else if (target.label) {
+ // Don't highlight blocks for these labels
+ var exclusions = ["<Anonymous>", "FUN"];
+ if (exclusions.some(function(x) { return target.label === x; })) {
+ return;
+ }
+
+ // If we only have the label, search for cells that match, but make sure
+ // to not select ones that have a filename and linenum.
+ selection
+ .filter(function(d) {
+ return d.label === target.label &&
+ d.filename === null &&
+ d.linenum === null;
+ })
+ .classed({ active: true });
+ }
+ }
+
+ // Move a D3 selection to front. If this is called on a selection, that
+ // selection should have been created with a data indexing function (e.g.
+ // data(data, function(d) { return ... })). Otherwise, the wrong object
+ // may be moved to the front.
+ function moveToFront(selection) {
+ return selection.each(function() {
+ this.parentNode.appendChild(this);
+ });
+ }
+
+
+ // Panning and zooming --------------------------------------------
+ // For panning and zooming x, d3.behavior.zoom does most of what we want
+ // automatically. For panning y, we can't use d3.behavior.zoom becuase it
+ // will also automatically add zooming, which we don't want. Instead, we
+ // need to use d3.behavior.drag and set the y domain appropriately.
+ var drag = d3.behavior.drag()
+ .on("drag", function() {
+ dragging = true;
+ var y = scales.y;
+ var ydom = y.domain();
+ var ydiff = y.invert(d3.event.dy) - y.invert(0);
+ y.domain([ydom[0] - ydiff, ydom[1] - ydiff]);
+ });
+
+
+ // For mousewheel zooming, we need to limit zoom amount. This is needed
+ // because in Firefox, zoom increments are too big. To do this, we limit
+ // scaleExtent before the first zoom event, and after each subsequent
+ // one.
+ //
+ // When zooming out, there's an additional limit: never zoom out past
+ // the original zoom span. The reason it's necessary to calculate this
+ // each time, instead of simply setting the scaleExtent() so that the
+ // lower bound is 1, is because other zoom events (like
+ // dblclick.zoomcell) are able to change the domain of scales.x, without
+ // changing the value of zoom.scale(). This means that the relationship
+ // between the zoom.scale() does not have a fixed linear relationship to
+ // the span of scales.x, and we have to recalculate it.
+ var maxZoomPerStep = 1.1;
+
+ function zoomOutLimit() {
+ var span = scales.x.domain()[1] - scales.x.domain()[0];
+ var startSpan = domains.x[1] - domains.x[0];
+ return Math.min(maxZoomPerStep, startSpan/span);
+ }
+
+ var zoom = d3.behavior.zoom()
+ .x(scales.x)
+ .on("zoomstart", function() {
+ zoom.scaleExtent([zoom.scale() / zoomOutLimit(), zoom.scale() * maxZoomPerStep]);
+ })
+ .on("zoom", function(e) {
+ redrawImmediate();
+ zoom.scaleExtent([zoom.scale() / zoomOutLimit(), zoom.scale() * maxZoomPerStep]);
+ });
+
+ // Register drag before zooming, because we need the drag to set the y
+ // scale before the zoom triggers a redraw.
+ svg
+ .on("mouseup", function(d) {
+ dragging = false;
+ })
+ .call(drag);
+
+ // Unlock selection when background is clicked, and zoom out when
+ // background is double-clicked.
+ backgroundRect
+ .on("mouseup", function(d) {
+ if (dragging) return;
+
+ // If it wasn't a drag, hide info box and unlock.
+ vis.infoBox.hide();
+ highlighter.click(null);
+ })
+ .on("dblclick.zoombackground", function() {
+ savePrevScales();
+
+ scales.x.domain(domains.x);
+ zoom.x(scales.x);
+
+ redrawZoom(250);
+ });
+
+
+ var zoomEnabled = false;
+ function disableZoom() {
+ if (zoomEnabled) {
+ svg.on(".zoom", null);
+ zoomEnabled = false;
+ }
+ }
+ function enableZoom() {
+ if (!zoomEnabled) {
+ svg
+ .call(zoom)
+ .on("dblclick.zoom", null); // Disable zoom's built-in double-click behavior
+ zoomEnabled = true;
+ }
+ }
+ enableZoom();
+
+ onResize();
+
+ return {
+ el: el,
+ onResize: onResize,
+ onUpdateInternals: onResize,
+ redrawImmediate: redrawImmediate,
+ redrawZoom: redrawZoom,
+ redrawCollapse: redrawCollapse,
+ redrawUncollapse: redrawUncollapse,
+ savePrevScales: savePrevScales,
+ useCollapsedDepth: useCollapsedDepth,
+ useUncollapsedDepth: useUncollapsedDepth,
+ addLockHighlight: addLockHighlight,
+ clearLockHighlight: clearLockHighlight,
+ addActiveHighlight: addActiveHighlight,
+ clearActiveHighlight: clearActiveHighlight,
+ disableZoom: disableZoom,
+ enableZoom: enableZoom
+ };
+ } // generateFlameGraph
+
+
+ function initInfoBox(el) {
+
+ function show(d) {
+ var label = d.label ? d.label : "";
+ var ref = (d.filename && d.linenum) ?
+ (d.filename + "#" + d.linenum) :
+ "(source unavailable)";
+
+ el.style.visibility = "";
+
+ el.innerHTML =
+ "<table>" +
+ "<tr><td class='infobox-title'>Label</td><td>" + escapeHTML(label) + "</td></tr>" +
+ "<tr><td class='infobox-title'>Called from</td><td>" + escapeHTML(ref) + "</td></tr>" +
+ "<tr><td class='infobox-title'>Total time</td><td>" + (d.endTime - d.startTime) + "ms</td></tr>" +
+ "<tr><td class='infobox-title'>Memory</td><td>" +
+ roundOneDecimal(d.sumMemDealloc) + " / " + roundOneDecimal(d.sumMemAlloc) +
+ " MB</td></tr>" +
+ "<tr><td class='infobox-title'>Agg. total time</td><td>" + vis.aggLabelTimes[label] + "ms</td></tr>" +
+ "<tr><td class='infobox-title'>Call stack depth</td><td>" + d.depth + "</td></tr>" +
+ "</table>";
+ }
+
+ function hide() {
+ el.style.visibility = "hidden";
+ }
+
+ hide();
+
+ return {
+ el: el,
+ show: show,
+ hide: hide
+ };
+ }
+
+ // Generate the tree table ----------------------------------------
+ function generateTreetable(el) {
+ var content = d3.select(el);
+
+ var table = content.append("table")
+ .attr("class", "results")
+ .attr("cellspacing", "0")
+ .attr("cellpadding", "0");
+
+ table.append("col");
+ table.append("col")
+ .style("width", "120px");
+ table.append("col")
+ .style("width", "50px")
+ .attr("class", "treetable-memory");
+ table.append("col")
+ .style("width", "26px")
+ .attr("class", "treetable-memory");
+ table.append("col")
+ .style("width", "50px")
+ .attr("class", "treetable-memory");
+ table.append("col")
+ .style("width", "50px");
+ table.append("col")
+ .style("width", "40px");
+
+ var tableBody = table.append("tbody");
+
+ var headerRows = tableBody.append("tr");
+
+ headerRows.append("th")
+ .attr("class", "code-label")
+ .text("Code");
+
+ headerRows.append("th")
+ .attr("class", "path")
+ .text("File");
+
+ headerRows.append("th")
+ .attr("class", "treetable-memory memory")
+ .attr("colspan", "3")
+ .text("Memory (MB)");
+
+ headerRows.append("th")
+ .attr("class", "time")
+ .attr("colspan", "2")
+ .text("Time (ms)");
+
+ // Retrieve all nodes (n), recursevely, where check(n) == true.
+ function allTopNodes(nodes, check) {
+ var included = [];
+ nodes = nodes.slice();
+
+ while (nodes.length > 0) {
+ var node = nodes.shift();
+
+ if (check(node))
+ included.push(node);
+ else {
+ node.sumChildren.forEach(function(c1) {
+ nodes.unshift(c1);
+ });
+ }
+ }
+ return included;
+ }
+
+ // Is there one node (n), including root, where check(n) == true?
+ function oneNode(root, check) {
+ var nodes = [root];
+
+ while (nodes.length > 0) {
+ var n = nodes.shift();
+ if (check(n))
+ return true;
+
+ n.sumChildren.forEach(function(x) {
+ nodes.unshift(x);
+ });
+ }
+
+ return false;
+ }
+
+ function updateRowsDisplay(d) {
+ if (vis.hideInternals && d.isInternal)
+ return "none";
+ else if (!vis.hideInternals && d.isDescendant)
+ return "none";
+
+ var collapsed = false;
+ while (d.parent) {
+ d = d.parent;
+ if (d.collapsed) {
+ collapsed = true;
+ break;
+ }
+ }
+ return collapsed ? "none" : "";
+ }
+
+ function toggleTreeNode(d) {
+ if (!d.canExpand)
+ return;
+
+ var collapsed = d.collapsed;
+ if (collapsed === undefined) {
+ // Create a copy since we might insert the same node twice: once
+ // for the normal leaf the other one for a collapsed node.
+ var sumChildren = d.sumChildren.map(function(x) {
+ return jQuery.extend({}, x);
+ });
+
+ var childNodes = sumChildren.filter(function(x) {
+ return x.depthCollapsed !== null;
+ });
+
+ childNodes.forEach(function(x) {
+ x.isInternal = d.isInternal ? d.isInternal : false;
+ x.isDescendant = d.isDescendant ? d.isDescendant : false;
+ });
+
+ var internalChildNodes = sumChildren.filter(function(x) {
+ return x.depthCollapsed === null;
+ });
+
+ internalChildNodes.forEach(function(x) {
+ x.isInternal = true;
+ x.isDescendant = false;
+ });
+
+ var notInternalDescendantNodes = [];
+ if (!d.isInternal) {
+ notInternalDescendantNodes = allTopNodes(internalChildNodes, function(x) {
+ return x.depthCollapsed !== null && d.depth < x.depth;
+ });
+ }
+
+ notInternalDescendantNodes.forEach(function(x) {
+ x.isInternal = false;
+ x.isDescendant = true;
+ });
+
+ childNodes = childNodes.concat(internalChildNodes);
+ childNodes = childNodes.concat(notInternalDescendantNodes);
+
+ childNodes.forEach(function(n) {
+ n.visualDepth = d.visualDepth + 1;
+ n.parent = d;
+ });
+
+ vis.profTable = vis.profTable.concat(childNodes);
+ d.collapsed = false;
+
+ updateRows();
+
+ // Nodes are sorted "heaviest first"
+ if (childNodes.length == 1) toggleTreeNode(childNodes[0]);
+ }
+ else {
+ d.collapsed = !collapsed;
+ updateRows();
+ }
+ }
+
+ function updateLabelCells(labelCell) {
+ labelCell
+ .attr("nowrap", "true")
+ .style("padding-left", function(d) {
+ return (8 + 15 * (d.visualDepth - 1)) + "px";
+ })
+ .on("click", toggleTreeNode)
+ .attr("class", function(d) {
+ d.canExpand = false;
+ if (d.sumChildren) {
+ d.sumChildren.forEach(function(c) {
+ if (c.sumChildren.length > 0) {
+ if (!vis.hideInternals || oneNode(c, function(c1) { return c1.depthCollapsed !== null; }))
+ d.canExpand = true;
+ }
+ });
+ }
+
+ var collapsedClass = "";
+ if (d.canExpand)
+ collapsedClass = d.collapsed === undefined ? "treetable-expand" : d.collapsed ? "treetable-expand" : "treetable-collapse";
+
+ return "code-label " + (d.canExpand ? "label-pointer " + collapsedClass : "");
+ });
+ }
+
+ function updateRows() {
+ var rows = tableBody.selectAll("tr.treetable-row")
+ .data(vis.profTable, function(d) {
+ return d.id;
+ });
+
+ rows.exit()
+ .remove();
+
+ var updatedRows = rows
+ .style("display", updateRowsDisplay);
+
+ var updatedLabelCells = updatedRows.selectAll("td.code-label");
+ updateLabelCells(updatedLabelCells);
+
+ var newRows = rows.enter()
+ .append("tr")
+ .filter(function(d) {
+ if (vis.hideInternals && d.depthCollapsed === null)
+ return false;
+
+ return true;
+ })
+ .on("click", function(d) {
+ table.selectAll("tr")
+ .style("background-color", null);
+
+ this.style.backgroundColor = "rgb(241, 241, 241)";
+ notifySourceFileMessage(d, "select");
+ })
+ .style("display", updateRowsDisplay);
+
+ newRows
+ .attr("class", "treetable-row");
+
+ var labelCell = newRows.append("td");
+ updateLabelCells(labelCell);
+
+ var cellWrapper = labelCell.append("div");
+ cellWrapper.append("div");
+
+ labelCell.append("div")
+ .attr("class", "label-text")
+ .text(function(d) { return d.label; });
+
+ newRows.append("td")
+ .attr("class", "path")
+ .text(function(d) {
+ var lastSlash = d.filename ? d.filename.lastIndexOf("/") : -1;
+ if (lastSlash >= 0)
+ return d.filename.substr(lastSlash + 1);
+
+ return d.filename;
+ });
+
+ newRows.append("td")
+ .attr("class", "treetable-memory memory-info")
+ .text(function(d) {
+ return roundOneDecimal(d.sumMemDealloc);
+ });
+
+ var memoryBarContainer = newRows.append("td")
+ .attr("class", "treetable-memory memory-bar-container");
+
+ var memoryLeftCell = memoryBarContainer.append("div")
+ .attr("class", "memory-leftbar-wrapper");
+
+ memoryLeftCell.append("div")
+ .attr("class", "memory-leftbar")
+ .style("width", function(d) {
+ return 1 + Math.min(Math.abs(Math.min(Math.round(d.propMemDealloc * 5), 0)), 5) + "px";
+ });
+
+ memoryBarContainer.append("div")
+ .attr("class", "memory-rightbar")
+ .style("width", function(d) {
+ return 1 + Math.min(Math.max(Math.round(d.propMemAlloc * 13), 0), 13) + "px";
+ });
+
+ newRows.append("td")
+ .attr("class", "treetable-memory memory-info-right")
+ .text(function(d) {
+ return roundOneDecimal(d.sumMemAlloc);
+ });
+
+ newRows.append("td")
+ .attr("class", "time-info")
+ .text(function(d) {
+ return d.sumTime;
+ });
+
+ var timeCell = newRows.append("td")
+ .attr("class", "time-bar-container");
+
+ timeCell.append("div")
+ .attr("class", "timebar")
+ .style("width", function(d) {
+ return Math.round(d.propTime * 20) + "px";
+ });
+
+ var unorderedRows = d3.selectAll("tr.treetable-row")
+ .data(vis.profTable, function(d) {
+ return d.id;
+ });
+
+ unorderedRows.sort(function(a,b) {
+ return (a.id < b.id) ? -1 : (a.id == b.id ? 0 : 1);
+ });
+
+ useMemoryResults();
+ }
+
+ var buildProfTable = function (profTree) {
+ var head = jQuery.extend({}, profTree);
+ var nodes = [head];
+
+ var aggregateChildren = function(node) {
+ var nameMap = {};
+ node.children.forEach(function(c) {
+ var nameMapEntry = nameMap[c.label];
+ if (!nameMapEntry) {
+ nameMapEntry = jQuery.extend({}, c);
+ nameMapEntry.sumTime = c.endTime - c.startTime;
+ nameMapEntry.sumChildren = [];
+ nameMapEntry.children = [];
+ nameMapEntry.parent = node;
+ nameMapEntry.sumCount = 1;
+ }
+ else {
+ nameMapEntry.sumMem = nameMapEntry.sumMem + c.sumMem;
+ nameMapEntry.sumMemDealloc = nameMapEntry.sumMemDealloc + c.sumMemDealloc;
+ nameMapEntry.sumMemAlloc = nameMapEntry.sumMemAlloc + c.sumMemAlloc;
+ nameMapEntry.sumTime = nameMapEntry.sumTime + (c.endTime - c.startTime);
+ nameMapEntry.sumCount = nameMapEntry.sumCount + 1;
+ }
+
+ nameMapEntry.propMem = nameMapEntry.sumMem / vis.totalMem;
+ nameMapEntry.propMemDealloc = nameMapEntry.sumMemDealloc / vis.totalMem;
+ nameMapEntry.propMemAlloc = nameMapEntry.sumMemAlloc / vis.totalMem;
+ nameMapEntry.propTime = nameMapEntry.sumTime / vis.totalTime;
+
+ c.children.forEach(function(e) {
+ nameMapEntry.children.push(e);
+ });
+
+ nameMap[c.label] = nameMapEntry;
+ });
+
+ var childrenSum = [];
+ for (var label in nameMap) {
+ childrenSum.push(nameMap[label]);
+ }
+
+ // Sort by time descending
+ childrenSum.sort(function(a, b) { return b.sumTime - a.sumTime });
+ return childrenSum;
+ };
+
+ function addToNodesAt(c, i) {
+ nodes.splice(i, 0, c);
+ }
+
+ var id = 0;
+ while (nodes.length > 0) {
+ var node = nodes.shift();
+
+ node.id = id;
+ id = id + 1;
+
+ node.sumChildren = aggregateChildren(node);
+
+ // Processing in order is important to preserve order of IDs!
+ node.sumChildren.forEach(addToNodesAt);
+ }
+
+ return head.sumChildren;
+ };
+
+ function useMemoryResults() {
+ d3.selectAll(".treetable-memory").style("display", vis.hideMemory ? "none" : "");
+ }
+
+ vis.profTable = buildProfTable(vis.profTree);
+ vis.profTable.forEach(function(e) {
+ e.visualDepth = 1;
+ });
+
+ updateRows();
+
+ return {
+ el: el,
+ onResize: updateRows,
+ onOptionsChange: updateRows,
+ onUpdateInternals: function() {
+
+ },
+ useMemoryResults: useMemoryResults
+ };
+ }
+
+ function enableScroll() {
+ vis.codeTable.enableScroll();
+ vis.flameGraph.enableZoom();
+ }
+
+ function disableScroll() {
+ vis.codeTable.disableScroll();
+ vis.flameGraph.disableZoom();
+ }
+
+
+ // Set up resizing --------------------------------------------------------
+
+ // This is used as a jQuery event namespace so that we can remove the window
+ // resize handler on subsequent calls to initResizing(). Not elegant, but it
+ // gets the job done.
+ var resizeCallbackNamespace = randomString(10);
+
+ // Resize panel1 and panel2 to 50% of available space and add callback
+ // for window resizing.
+ function initResizing() {
+ var $el = $(vis.el);
+ var $panel1 = $el.children(".profvis-panel1");
+ var $panel2 = $el.children(".profvis-panel2");
+ var $splitBar = $el.children(".profvis-splitbar");
+ var $statusBar = $el.children(".profvis-status-bar");
+
+ // Clear any existing positioning that may have happened from previous
+ // calls to this function and the callbacks that it sets up.
+ $panel1.removeAttr("style");
+ $panel2.removeAttr("style");
+ $splitBar.removeAttr("style");
+ $statusBar.removeAttr("style");
+
+ // CSS class suffix for split direction
+ var splitClass = (vis.splitDir === "h") ? "horizontal" : "vertical";
+
+ // Remove existing horizontal/vertical class and add the correct class back.
+ $panel1.removeClass("profvis-panel1-horizontal profvis-panel1-vertical");
+ $panel2.removeClass("profvis-panel2-horizontal profvis-panel2-vertical");
+ $splitBar.removeClass("profvis-splitbar-horizontal profvis-splitbar-vertical");
+ $panel1.addClass("profvis-panel1-" + splitClass);
+ $panel2.addClass("profvis-panel2-" + splitClass);
+ $splitBar.addClass("profvis-splitbar-" + splitClass);
+
+
+ var splitBarGap;
+ var margin;
+ // Record the proportions from the previous call to resizePanels. This is
+ // needed when we resize the window to preserve the same proportions.
+ var lastSplitProportion;
+
+ if (vis.splitDir === "v") {
+ // Record the gap between the split bar and the objects to left and right
+ splitBarGap = {
+ left: $splitBar.offset().left - offsetRight($panel1),
+ right: $panel2.offset().left - offsetRight($splitBar)
+ };
+
+ // Capture the initial distance from the left and right of container element
+ margin = {
+ left: $panel1.position().left,
+ right: $el.innerWidth() - positionRight($panel2)
+ };
+
+ } else if (vis.splitDir === "h") {
+ splitBarGap = {
+ top: $splitBar.offset().top - offsetBottom($panel1),
+ bottom: $panel2.offset().top - offsetBottom($splitBar)
+ };
+
+ margin = {
+ top: $panel1.position().top,
+ bottom: $el.innerWidth() - positionBottom($panel2)
+ };
+ }
+
+ // Resize the panels. splitProportion is a number from 0-1 representing the
+ // horizontal position of the split bar.
+ function resizePanels(splitProportion) {
+ if (!splitProportion)
+ splitProportion = lastSplitProportion;
+
+ if (vis.splitDir === "v") {
+ var innerWidth = offsetRight($panel2) - $panel1.offset().left;
+
+ $splitBar.offset({
+ left: $panel1.offset().left + innerWidth * splitProportion -
+ $splitBar.outerWidth()/2
+ });
+
+ // Size and position the panels
+ $panel1.outerWidth($splitBar.position().left - splitBarGap.left -
+ margin.left);
+ $panel2.offset({ left: offsetRight($splitBar) + splitBarGap.right });
+
+ } else if (vis.splitDir === "h") {
+ var innerHeight = offsetBottom($panel2) - $panel1.offset().top;
+
+ $splitBar.offset({
+ top: $panel1.offset().top + innerHeight * splitProportion -
+ $splitBar.outerHeight()/2
+ });
+
+ // Size and position the panels
+ $panel1.outerHeight($splitBar.position().top - splitBarGap.top -
+ margin.top);
+ $panel2.offset({ top: offsetBottom($splitBar) + splitBarGap.bottom });
+ }
+
+ lastSplitProportion = splitProportion;
+ }
+
+ // Initially, set widths to 50/50
+ // For the first sizing, we don't need to call vis.flameGraph.onResize()
+ // because this happens before the flame graph is generated.
+ resizePanels(0.5);
+
+ var resizePanelsDebounced = debounce(function() {
+ resizePanels(lastSplitProportion);
+ vis.activeViews.forEach(function(e) {
+ if (e.onResize) e.onResize();
+ });
+ }, 250);
+
+ // Clear old resize handler and add new one. We use a namespace for this
+ // visualization to make sure not to delete handlers for other profvis
+ // visualizations on the same page (this can happen with Rmd documents).
+ $(window).off("resize.profvis." + resizeCallbackNamespace);
+ $(window).on("resize.profvis." + resizeCallbackNamespace, resizePanelsDebounced);
+
+ // Get current proportional position of split bar
+ function splitProportion() {
+ var splitCenter;
+
+ if (vis.splitDir === "v") {
+ splitCenter = $splitBar.offset().left - $panel1.offset().left +
+ $splitBar.outerWidth()/2;
+ var innerWidth = offsetRight($panel2) - $panel1.offset().left;
+ return splitCenter / innerWidth;
+
+ } else if (vis.splitDir === "h") {
+ splitCenter = $splitBar.offset().top - $panel1.offset().top +
+ $splitBar.outerHeight()/2;
+ var innerHeight = offsetBottom($panel2) - $panel1.offset().top;
+ return splitCenter / innerHeight;
+ }
+ }
+
+ function positionRight($el) {
+ return $el.position().left + $el.outerWidth();
+ }
+ function offsetRight($el) {
+ return $el.offset().left + $el.outerWidth();
+ }
+ function positionBottom($el) {
+ return $el.position().top + $el.outerHeight();
+ }
+ function offsetBottom($el) {
+ return $el.offset().top + $el.outerHeight();
+ }
+
+ // Enable dragging of the split bar ---------------------------------------
+ (function() {
+ var dragging = false;
+ // For vertical split (left-right dragging)
+ var startDragX;
+ var startOffsetLeft;
+ // For horizontal split (up-down dragging)
+ var startDragY;
+ var startOffsetTop;
+
+ var stopDrag = function(e) {
+ if (!dragging) return;
+ dragging = false;
+
+ document.removeEventListener("mousemove", drag);
+ document.removeEventListener("mouseup", stopDrag);
+
+ $splitBar.css("opacity", "");
+
+ if ((vis.splitDir === "v" && e.pageX - startDragX === 0) ||
+ (vis.splitDir === "h" && e.pageY - startDragY === 0)) {
+ return;
+ }
+
+ resizePanels(splitProportion());
+ vis.flameGraph.onResize();
+ };
+
+ var startDrag = function(e) {
+ // Don't start another drag if we're already in one.
+ if (dragging) return;
+ dragging = true;
+ pauseEvent(e);
+
+ $splitBar.css("opacity", 0.75);
+
+ if (vis.splitDir === "v") {
+ startDragX = e.pageX;
+ startOffsetLeft = $splitBar.offset().left;
+ } else {
+ startDragY = e.pageY;
+ startOffsetTop = $splitBar.offset().top;
+ }
+
+ document.addEventListener("mousemove", drag);
+ document.addEventListener("mouseup", stopDrag);
+ };
+
+ var drag = function(e) {
+ if (!dragging) return;
+ pauseEvent(e);
+
+ if (vis.splitDir === "v") {
+ var dx = e.pageX - startDragX;
+ if (dx === 0)
+ return;
+
+ // Move the split bar
+ $splitBar.offset({ left: startOffsetLeft + dx });
+
+ } else if (vis.splitDir === "h") {
+ var dy = e.pageY - startDragY;
+ if (dy === 0)
+ return;
+
+ // Move the split bar
+ $splitBar.offset({ top: startOffsetTop + dy });
+ }
+ };
+
+ // Stop propogation so that we don't select text while dragging
+ function pauseEvent(e){
+ if(e.stopPropagation) e.stopPropagation();
+ if(e.preventDefault) e.preventDefault();
+ e.cancelBubble = true;
+ e.returnValue = false;
+ return false;
+ }
+
+ // Remove existing event listener from previous calls to initResizing().
+ $splitBar.off("mousedown.profvis");
+ $splitBar.on("mousedown.profvis", startDrag);
+ })();
+
+
+ return {
+ resizePanels: resizePanels
+ };
+ }
+
+
+ var prof = prepareProfData(message.prof, message.interval);
+
+ var vis = {
+ el: el,
+ prof: prof,
+ profTree: getProfTree(prof),
+ interval: message.interval,
+ totalTime: getTotalTime(prof),
+ totalMem: getTotalMemory(prof),
+ files: message.files,
+ aggLabelTimes: getAggregatedLabelTimes(prof),
+ fileLineStats: getFileLineStats(prof, message.files),
+ profTable: [],
+
+ // Objects representing each component
+ statusBar: null,
+ optionsPanel: null,
+ codeTable: null,
+ flameGraph: null,
+ infoBox: null,
+ treetable: null,
+ activeViews: [],
+
+ // Functions to enable/disable responding to scrollwheel events
+ enableScroll: enableScroll,
+ disableScroll: disableScroll,
+
+ splitDir: message.split,
+ hideInternals: true,
+ hideMemory: false,
+
+ resizePanels: null
+ };
+
+
+ // Render the objects ---------------------------------------------
+
+ var statusBarEl = document.createElement("div");
+ statusBarEl.className = "profvis-status-bar";
+ vis.el.appendChild(statusBarEl);
+
+ // Container panels - top/bottom or left/right
+ var panel1 = document.createElement("div");
+ panel1.className = "profvis-panel1";
+ vis.el.appendChild(panel1);
+
+ var panel2 = document.createElement("div");
+ panel2.className = "profvis-panel2";
+ vis.el.appendChild(panel2);
+
+ var splitBarEl = document.createElement("div");
+ splitBarEl.className = "profvis-splitbar";
+ vis.el.appendChild(splitBarEl);
+
+ var footerEl = document.createElement("div");
+ footerEl.className = "profvis-footer";
+ vis.el.appendChild(footerEl);
+
+ // Items in the panels
+ var codeTableEl = document.createElement("div");
+ codeTableEl.className = "profvis-code";
+ panel1.appendChild(codeTableEl);
+
+ var flameGraphEl = document.createElement("div");
+ flameGraphEl.className = "profvis-flamegraph";
+ panel2.appendChild(flameGraphEl);
+
+ var infoBoxEl = document.createElement("div");
+ infoBoxEl.className = "profvis-infobox";
+ panel2.appendChild(infoBoxEl);
+
+ var treetableEl = document.createElement("div");
+ treetableEl.className = "profvis-treetable";
+ treetableEl.style.display = "none";
+ vis.el.appendChild(treetableEl);
+
+ var optionsPanelEl = document.createElement("div");
+ optionsPanelEl.className = "profvis-options-panel";
+ vis.el.appendChild(optionsPanelEl);
+
+ // Efficient to properly size panels before the code + flamegraph are
+ // rendered, so that we don't have to re-render.
+ var resize = initResizing();
+ vis.resizePanels = resize.resizePanels;
+
+ var hideViews = function() {
+ splitBarEl.style.display = "none";
+ panel1.style.display = "none";
+ panel2.style.display = "none";
+ treetableEl.style.display = "none";
+ };
+
+ var toggleViews = function(view) {
+ hideViews();
+
+ switch (view) {
+ case "flamegraph":
+ splitBarEl.style.display = "block";
+ panel1.style.display = "block";
+ panel2.style.display = "block";
+
+ vis.activeViews = [vis.flameGraph, vis.codeTable];
+ vis.resizePanels();
+ break;
+ case "treetable":
+ if (!vis.treetable) {
+ vis.treetable = generateTreetable(treetableEl);
+ }
+
+ treetableEl.style.display = "block";
+
+ vis.activeViews = [vis.treetable];
+ break;
+ }
+
+ vis.activeViews.forEach(function(e) {
+ if (e.onResize) e.onResize();
+ });
+ };
+
+ var onOptionsChange = function(option, checked) {
+ switch (option)
+ {
+ case "split": {
+ vis.splitDir = checked ? "h" : "v";
+ // Check that flame graph is visible
+ if ($.inArray(vis.flameGraph, vis.activeViews) !== -1) {
+ initResizing();
+ vis.flameGraph.onResize();
+ }
+ break;
+ }
+ case "internals": {
+ vis.flameGraph.savePrevScales();
+
+ vis.hideInternals = checked;
+ if (checked) {
+ vis.flameGraph.useCollapsedDepth();
+ vis.flameGraph.redrawCollapse(400, 400);
+ } else {
+ vis.flameGraph.useUncollapsedDepth();
+ vis.flameGraph.redrawUncollapse(400, 250);
+ }
+
+ vis.activeViews.forEach(function(e) {
+ if (e.onOptionsChange) e.onOptionsChange();
+ });
+
+ break;
+ }
+ case "memory": {
+ vis.hideMemory = checked;
+ vis.activeViews.forEach(function(e) {
+ if (e.useMemoryResults) e.useMemoryResults();
+ });
+ break;
+ }
+ }
+ };
+
+ // Create the UI components
+ vis.statusBar = generateStatusBar(statusBarEl, toggleViews);
+ vis.footer = generateFooter(footerEl);
+ vis.optionsPanel = generateOptionsPanel(optionsPanelEl, onOptionsChange);
+ vis.codeTable = generateCodeTable(codeTableEl);
+ vis.flameGraph = generateFlameGraph(flameGraphEl);
+ vis.infoBox = initInfoBox(infoBoxEl);
+ vis.treetable = null;
+ vis.activeViews = [vis.flameGraph, vis.codeTable];
+
+ // If any depth collapsing occured, enable the "hide internal" checkbox.
+ if (prof.some(function(d) { return d.depth !== d.depthCollapsed; })) {
+ vis.optionsPanel.enableHideInternal();
+ }
+
+ // Start with scrolling disabled because of mousewheel scrolling issue
+ disableScroll();
+
+ // Make the vis object accessible via the DOM element
+ $(el).data("profvis", vis);
+
+ return vis;
+ }; // profvis.render()
+
+ // Calculate amount of time spent on each line of code. Returns nested objects
+ // grouped by file, and then by line number.
+ function getFileLineStats(prof, files) {
+ // Drop entries with null or "" filename
+ prof = prof.filter(function(row) {
+ return row.filename !== null && row.filename !== "";
+ });
+
+ // Gather line-by-line file contents
+ var fileLineStats = files.map(function(file) {
+ // Create array of objects with info for each line of code.
+ var lines = file.content.split("\n");
+ var lineData = [];
+ var filename = file.filename;
+ var normpath = file.normpath;
+ for (var i=0; i<lines.length; i++) {
+ lineData[i] = {
+ filename: filename,
+ normpath: normpath,
+ linenum: i + 1,
+ content: lines[i],
+ sumTime: 0,
+ sumMem: 0,
+ sumMemAlloc: 0,
+ sumMemDealloc: 0
+ };
+ }
+
+ return {
+ filename: filename,
+ lineData: lineData
+ };
+ });
+
+ // Get timing data for each line
+ var statsData = d3.nest()
+ .key(function(d) { return d.filename; })
+ .key(function(d) { return d.linenum; })
+ .rollup(function(leaves) {
+ var sumTime = leaves.reduce(function(sum, d) {
+ // Add this node's time only if no ancestor node has the same
+ // filename and linenum. This is to avoid double-counting times for
+ // a line.
+ var incTime = 0;
+ if (!ancestorHasFilenameLinenum(d.filename, d.linenum, d.parent)) {
+ incTime = d.endTime - d.startTime;
+ }
+ return sum + incTime;
+ }, 0);
+
+ var sumMem = leaves.reduce(function(sum, d) {
+ return sum + d.sumMem;
+ }, 0);
+
+ var sumMemDealloc = leaves.reduce(function(sum, d) {
+ return sum + d.sumMemDealloc;
+ }, 0);
+
+ var sumMemAlloc = leaves.reduce(function(sum, d) {
+ return sum + d.sumMemAlloc;
+ }, 0);
+
+ return {
+ filename: leaves[0].filename,
+ linenum: leaves[0].linenum,
+ sumTime: sumTime,
+ sumMem: sumMem,
+ sumMemAlloc: sumMemAlloc,
+ sumMemDealloc: sumMemDealloc
+ };
+ })
+ .entries(prof);
+
+ // Insert the sumTimes into line content data
+ statsData.forEach(function(fileInfo) {
+ // Find item in fileTimes that matches the file of this fileInfo object
+ var fileLineData = fileLineStats.filter(function(d) {
+ return d.filename === fileInfo.key;
+ })[0].lineData;
+
+ fileInfo.values.forEach(function(lineInfo) {
+ lineInfo = lineInfo.values;
+ fileLineData[lineInfo.linenum - 1].sumTime = lineInfo.sumTime;
+ fileLineData[lineInfo.linenum - 1].sumMem = lineInfo.sumMem;
+ fileLineData[lineInfo.linenum - 1].sumMemDealloc = lineInfo.sumMemDealloc;
+ fileLineData[lineInfo.linenum - 1].sumMemAlloc = lineInfo.sumMemAlloc;
+ });
+ });
+
+ // Calculate proportional times, relative to the longest time in the data
+ // set. Modifies data in place.
+ var fileMaxTimes = fileLineStats.map(function(lines) {
+ var lineTimes = lines.lineData.map(function(x) { return x.sumTime; });
+ return d3.max(lineTimes);
+ });
+
+ var maxTime = d3.max(fileMaxTimes);
+
+ fileLineStats.map(function(lines) {
+ lines.lineData.map(function(line) {
+ line.propTime = line.sumTime / maxTime;
+ });
+ });
+
+ var totalMem = getTotalMemory(prof);
+
+ fileLineStats.map(function(lines) {
+ lines.lineData.map(function(line) {
+ line.propMem = line.sumMem / totalMem;
+ line.propMemDealloc = line.sumMemDealloc / totalMem;
+ line.propMemAlloc = line.sumMemAlloc / totalMem;
+ });
+ });
+
+ return fileLineStats;
+
+ // Returns true if the given node or one of its ancestors has the given
+ // filename and linenum; false otherwise.
+ function ancestorHasFilenameLinenum(filename, linenum, node) {
+ if (!node) {
+ return false;
+ }
+ if (node.filename === filename && node.linenum === linenum) {
+ return true;
+ }
+ return ancestorHasFilenameLinenum(filename, linenum, node.parent);
+ }
+ }
+
+ function prepareProfData(prof, interval) {
+ // Convert object-with-arrays format prof data to array-of-objects format
+ var data = colToRows(prof);
+ data = addParentChildLinks(data);
+ data = consolidateRuns(data);
+ data = applyInterval(data, interval);
+ data = findCollapsedDepths(data);
+
+ return data;
+ }
+
+ // Given the raw profiling data, convert `time` and `lastTime` fields to
+ // `startTime` and `endTime`, and use the supplied interval. Modifies data
+ // in place.
+ function applyInterval(prof, interval) {
+ prof.forEach(function(d) {
+ d.startTime = interval * (d.time - 1);
+ d.endTime = interval * (d.lastTime);
+ delete d.time;
+ delete d.lastTime;
+ });
+
+ return prof;
+ }
+
+ // Find the total time spanned in the data
+ function getTotalTime(prof) {
+ return d3.max(prof, function(d) { return d.endTime; }) -
+ d3.min(prof, function(d) { return d.startTime; });
+ }
+
+ // Find the total memory spanned in the data
+ function getTotalMemory(prof) {
+ return d3.max(prof, function(d) { return d.memalloc; });
+ }
+
+ // Calculate the total amount of time spent in each function label
+ function getAggregatedLabelTimes(prof) {
+ var labelTimes = {};
+ var tree = getProfTree(prof);
+ calcLabelTimes(tree);
+
+ return labelTimes;
+
+ // Traverse the tree with the following strategy:
+ // * Check if current label is used in an ancestor.
+ // * If yes, don't add to times for that label.
+ // * If no, do add to times for that label.
+ // * Recurse into children.
+ function calcLabelTimes(node) {
+ var label = node.label;
+ if (!ancestorHasLabel(label, node.parent)) {
+ if (labelTimes[label] === undefined)
+ labelTimes[label] = 0;
+
+ labelTimes[label] += node.endTime - node.startTime;
+ }
+
+ node.children.forEach(calcLabelTimes);
+ }
+
+ // Returns true if the given node or one of its ancestors has the given
+ // label; false otherwise.
+ function ancestorHasLabel(label, node) {
+ if (node) {
+ if (node.label === label) {
+ return true;
+ }
+ return ancestorHasLabel(label, node.parent);
+ } else {
+ return false;
+ }
+ }
+ }
+
+
+ // Given profiling data, add parent and child links to indicate stack
+ // relationships.
+ function addParentChildLinks(prof) {
+ var data = d3.nest()
+ .key(function(d) { return d.time; })
+ .rollup(function(leaves) {
+ leaves = leaves.sort(function(a, b) { return a.depth - b.depth; });
+
+ leaves[0].parent = null;
+ leaves[0].children = [];
+
+ for (var i=1; i<leaves.length; i++) {
+ leaves[i-1].children.push(leaves[i]);
+ leaves[i].parent = leaves[i-1];
+ leaves[i].children = [];
+ }
+
+ return leaves;
+ })
+ .map(prof);
+
+ // Convert data from object of arrays to array of arrays
+ data = d3.map(data).values();
+ // Flatten data
+ return d3.merge(data);
+ }
+
+
+ // Given profiling data, consolidate consecutive blocks for a flamegraph.
+ // This function also assigns correct parent-child relationships to form a
+ // tree of data objects, with a hidden root node at depth 0.
+ function consolidateRuns(prof) {
+ // Create a special top-level leaf whose only purpose is to point to its
+ // children, the items at depth 1.
+ var topLeaf = {
+ depth: 0,
+ parent: null,
+ children: prof.filter(function(d) { return d.depth === 1; })
+ };
+
+ var tree = consolidateTree(topLeaf);
+ var data = treeToArray(tree);
+ // Remove the root node from the flattened data
+ data = data.filter(function(d) { return d.depth !== 0; });
+ return data;
+
+ function consolidateTree(tree) {
+ var leaves = tree.children;
+ leaves = leaves.sort(function(a, b) { return a.time - b.time; });
+
+ // Collapse consecutive leaves, with some conditions
+ var startLeaf = null; // leaf starting this run
+ var lastLeaf = null; // The last leaf we've looked at
+ var newLeaves = [];
+ var collectedChildren = [];
+ var sumMem = 0;
+ var sumMemDealloc = 0;
+ var sumMemAlloc = 0;
+
+ // This takes the start leaf, end leaf, and the set of children for the
+ // new leaf, and creates a new leaf which copies all its properties from
+ // the startLeaf, except lastTime and children.
+ function addNewLeaf(startLeaf, endLeaf, newLeafChildren, sumMem, sumMemDealloc, sumMemAlloc) {
+ var newLeaf = $.extend({}, startLeaf);
+ newLeaf.lastTime = endLeaf.time;
+ newLeaf.parent = tree;
+ newLeaf.children = newLeafChildren;
+
+ // Recurse into children
+ newLeaf = consolidateTree(newLeaf);
+
+ // Aggregate memory from this consolidation batch and their children
+ aggregateMemory(newLeaf, sumMem, sumMemDealloc, sumMemAlloc);
+
+ newLeaves.push(newLeaf);
+ }
+
+ function aggregateMemory(leaf, sumMem, sumMemDealloc, sumMemAlloc) {
+ leaf.sumMem = sumMem;
+ leaf.sumMemDealloc = sumMemDealloc;
+ leaf.sumMemAlloc = sumMemAlloc;
+ if (leaf.children) {
+ leaf.children.forEach(function(child) {
+ leaf.sumMem += child.sumMem ? child.sumMem : 0;
+ leaf.sumMemDealloc += child.sumMemDealloc ? child.sumMemDealloc : 0;
+ leaf.sumMemAlloc += child.sumMemAlloc ? child.sumMemAlloc : 0;
+ });
+ }
+ }
+
+ for (var i=0; i<leaves.length; i++) {
+ var leaf = leaves[i];
+
+ if (i === 0) {
+ startLeaf = leaf;
+ sumMem = sumMemAlloc = sumMemDealloc = 0;
+ } else if (leaf.label !== startLeaf.label ||
+ leaf.filename !== startLeaf.filename ||
+ leaf.linenum !== startLeaf.linenum ||
+ leaf.depth !== startLeaf.depth)
+ {
+ addNewLeaf(startLeaf, lastLeaf, collectedChildren, sumMem, sumMemDealloc, sumMemAlloc);
+
+ collectedChildren = [];
+ startLeaf = leaf;
+ sumMem = sumMemAlloc = sumMemDealloc = 0;
+ }
+
+ sumMem += leaf.meminc;
+ sumMemDealloc += Math.min(leaf.meminc, 0);
+ sumMemAlloc += Math.max(leaf.meminc, 0);
+ collectedChildren = collectedChildren.concat(leaf.children);
+ lastLeaf = leaf;
+ }
+
+ // Add the last one, if there were any at all
+ if (i !== 0) {
+ addNewLeaf(startLeaf, lastLeaf, collectedChildren, sumMem, sumMemDealloc, sumMemAlloc);
+ }
+
+ tree.children = newLeaves;
+ return tree;
+ }
+
+ // Given a tree, pull out all the leaves and put them in a flat array
+ function treeToArray(tree) {
+ var allLeaves = [];
+
+ function pushLeaves(leaf) {
+ allLeaves.push(leaf);
+ leaf.children.forEach(pushLeaves);
+ }
+
+ pushLeaves(tree);
+ return allLeaves;
+ }
+ }
+
+
+ // Given profiling data with parent-child information, get the root node.
+ function getProfTree(prof) {
+ if (prof.length === 0)
+ return null;
+
+ // Climb up to the top of the tree
+ var node = prof[0];
+ while (node.parent) {
+ node = node.parent;
+ }
+ return node;
+ }
+
+
+ // Given profiling data, find depth of items after hiding items between
+ // items with labels "..stacktraceoff.." and "..stacktraceon..". Modifies
+ // data in place.
+ function findCollapsedDepths(data) {
+ var tree = getProfTree(data);
+ calculateDepths(tree, tree.depth, 0);
+ return data;
+
+ function calculateDepths(node, curCollapsedDepth, stacktraceOffCount) {
+ if (node.label === "..stacktraceoff..") {
+ stacktraceOffCount++;
+ }
+
+ if (stacktraceOffCount > 0) {
+ node.depthCollapsed = null;
+ } else {
+ node.depthCollapsed = curCollapsedDepth;
+ curCollapsedDepth++;
+ }
+
+ if (node.label === "..stacktraceon..") {
+ stacktraceOffCount--;
+ }
+
+ // Recurse
+ node.children.forEach(function(x) {
+ calculateDepths(x, curCollapsedDepth, stacktraceOffCount);
+ });
+ }
+ }
+
+
+ // Transform column-oriented data (an object with arrays) to row-oriented data
+ // (an array of objects).
+ function colToRows(x) {
+ var colnames = d3.keys(x);
+ if (colnames.length === 0)
+ return [];
+
+ var newdata = [];
+ for (var i=0; i < x[colnames[0]].length; i++) {
+ var row = {};
+ for (var j=0; j < colnames.length; j++) {
+ var colname = colnames[j];
+ row[colname] = x[colname][i];
+ }
+ newdata[i] = row;
+ }
+
+ return newdata;
+ }
+
+ // Given an array with two values (a min and max), return an array with the
+ // range expanded by `amount`.
+ function expandRange(range, amount) {
+ var adjust = amount * (range[1] - range[0]);
+ return [
+ range[0] - adjust,
+ range[1] + adjust
+ ];
+ }
+
+
+ // Escape an HTML string.
+ function escapeHTML(text) {
+ return text
+ .replace(/&/g, "&")
+ .replace(/</g, "<")
+ .replace(/>/g, ">")
+ .replace(/"/g, """)
+ .replace(/'/g, "'");
+ }
+
+ // This returns the current page URL without any trailing hash. Should be
+ // used in url() references in SVGs to avoid problems when there's a <base>
+ // tag in the document.
+ function urlNoHash() {
+ return window.location.href.split("#")[0];
+ }
+
+ function debounce(f, delay) {
+ var timer = null;
+ return function() {
+ var context = this;
+ var args = arguments;
+ clearTimeout(timer);
+ timer = setTimeout(function () {
+ f.apply(context, args);
+ }, delay);
+ };
+ }
+
+ function randomString(length) {
+ var chars = 'abcdefghijklmnopqrstuvwxyz';
+ var result = '';
+ for (var i = length; i > 0; --i)
+ result += chars[Math.floor(Math.random() * chars.length)];
+ return result;
+ }
+
+ var getNormPath = function(files, filename) {
+ var normpath = null;
+ files.forEach(function(e) {
+ if (e.filename == filename) {
+ normpath = e.normpath;
+ }
+ });
+ return normpath;
+ };
+
+
+ (function() {
+ // Prevent unwanted scroll capturing. Based on the corresponding code in
+ // https://github.com/rstudio/leaflet
+
+ // The rough idea is that we disable scroll wheel zooming inside each
+ // profvis object, until the user moves the mouse cursor or clicks on the
+ // visualization. This is trickier than just listening for mousemove,
+ // because mousemove is fired when the page is scrolled, even if the user
+ // did not physically move the mouse. We handle this by examining the
+ // mousemove event's screenX and screenY properties; if they change, we know
+ // it's a "true" move.
+ //
+ // There's a complication to this: when the mouse wheel is scrolled quickly,
+ // on the step where the profvis DOM object overlaps the cursor, sometimes
+ // the mousemove event happens before the mousewheel event, and sometimes
+ // it's the reverse (at least on Chrome 46 on Linux). This means that we
+ // can't rely on the mousemove handler disabling the profvis object's zoom
+ // before a scroll event is triggered on the profvis object (cauzing
+ // zooming). In order to deal with this, we start each profvis object with
+ // zooming disabled, and also disable zooming when the cursor leaves the
+ // profvis div. That way, even if a mousewheel event gets triggered on the
+ // object before the mousemove, it won't cause zooming.
+
+ // lastScreen can never be null, but its x and y can.
+ var lastScreen = { x: null, y: null };
+
+ $(document)
+ .on("mousewheel DOMMouseScroll", function(e) {
+ // Any mousemove events at this screen position will be ignored.
+ lastScreen = { x: e.originalEvent.screenX, y: e.originalEvent.screenY };
+ })
+ .on("mousemove", ".profvis", function(e) {
+ // Did the mouse really move?
+ if (lastScreen.x !== null && e.screenX !== lastScreen.x || e.screenY !== lastScreen.y) {
+ $(this).data("profvis").flameGraph.enableZoom();
+ lastScreen = { x: null, y: null };
+ }
+ })
+ .on("mousedown", ".profvis", function(e) {
+ // Clicking always enables zooming.
+ $(this).data("profvis").flameGraph.enableZoom();
+ lastScreen = { x: null, y: null };
+ })
+ .on("mouseleave", ".profvis", function(e) {
+ $(this).data("profvis").flameGraph.disableZoom();
+ });
+ })();
+
+ return profvis;
+})();
diff --git a/_freeze/site_libs/profvis-0.3.6.9000/scroll.js b/_freeze/site_libs/profvis-0.3.6.9000/scroll.js
@@ -0,0 +1,69 @@
+(function() {
+
+ // Polyfill for scrollIntoViewIfNeeded()
+ // From https://gist.github.com/jocki84/6ffafd003387179a988e
+ // License: ISC
+ if (!Element.prototype.scrollIntoViewIfNeeded) {
+ Element.prototype.scrollIntoViewIfNeeded = function (centerIfNeeded) {
+ "use strict";
+
+ function makeRange(start, length) {
+ return {"start": start, "length": length, "end": start + length};
+ }
+
+ function coverRange(inner, outer) {
+ if (
+ false === centerIfNeeded ||
+ (outer.start < inner.end && inner.start < outer.end)
+ ) {
+ return Math.max(
+ inner.end - outer.length,
+ Math.min(outer.start, inner.start)
+ );
+ }
+ return (inner.start + inner.end - outer.length) / 2;
+ }
+
+ function makePoint(x, y) {
+ return {
+ "x": x,
+ "y": y,
+ "translate": function translate(dX, dY) {
+ return makePoint(x + dX, y + dY);
+ }
+ };
+ }
+
+ function absolute(elem, pt) {
+ while (elem) {
+ pt = pt.translate(elem.offsetLeft, elem.offsetTop);
+ elem = elem.offsetParent;
+ }
+ return pt;
+ }
+
+ var target = absolute(this, makePoint(0, 0)),
+ extent = makePoint(this.offsetWidth, this.offsetHeight),
+ elem = this.parentNode,
+ origin;
+
+ while (elem instanceof HTMLElement) {
+ // Apply desired scroll amount.
+ origin = absolute(elem, makePoint(elem.clientLeft, elem.clientTop));
+ elem.scrollLeft = coverRange(
+ makeRange(target.x - origin.x, extent.x),
+ makeRange(elem.scrollLeft, elem.clientWidth)
+ );
+ elem.scrollTop = coverRange(
+ makeRange(target.y - origin.y, extent.y),
+ makeRange(elem.scrollTop, elem.clientHeight)
+ );
+
+ // Determine actual scroll amount by reading back scroll properties.
+ target = target.translate(-elem.scrollLeft, -elem.scrollTop);
+ elem = elem.parentNode;
+ }
+ };
+ }
+
+})()
+\ No newline at end of file
diff --git a/_freeze/site_libs/profvis-binding-0.4.0/profvis.js b/_freeze/site_libs/profvis-binding-0.4.0/profvis.js
@@ -0,0 +1,23 @@
+HTMLWidgets.widget({
+
+ name: 'profvis',
+
+ type: 'output',
+
+ initialize: function(el, width, height) {
+
+ return {
+ // TODO: add instance fields as required
+ };
+
+ },
+
+ renderValue: function(el, x, instance) {
+ profvis.render(el, x.message);
+ },
+
+ resize: function(el, width, height, instance) {
+
+ }
+
+});
diff --git a/_freeze/site_libs/quarto-listing/list.min.js b/_freeze/site_libs/quarto-listing/list.min.js
@@ -0,0 +1,2 @@
+var List;List=function(){var t={"./src/add-async.js":function(t){t.exports=function(t){return function e(r,n,s){var i=r.splice(0,50);s=(s=s||[]).concat(t.add(i)),r.length>0?setTimeout((function(){e(r,n,s)}),1):(t.update(),n(s))}}},"./src/filter.js":function(t){t.exports=function(t){return t.handlers.filterStart=t.handlers.filterStart||[],t.handlers.filterComplete=t.handlers.filterComplete||[],function(e){if(t.trigger("filterStart"),t.i=1,t.reset.filter(),void 0===e)t.filtered=!1;else{t.filtered=!0;for(var r=t.items,n=0,s=r.length;n<s;n++){var i=r[n];e(i)?i.filtered=!0:i.filtered=!1}}return t.update(),t.trigger("filterComplete"),t.visibleItems}}},"./src/fuzzy-search.js":function(t,e,r){r("./src/utils/classes.js");var n=r("./src/utils/events.js"),s=r("./src/utils/extend.js"),i=r("./src/utils/to-string.js"),a=r("./src/utils/get-by-class.js"),o=r("./src/utils/fuzzy.js");t.exports=function(t,e){e=s({location:0,distance:100,threshold:.4,multiSearch:!0,searchClass:"fuzzy-search"},e=e||{});var r={search:function(n,s){for(var i=e.multiSearch?n.replace(/ +$/,"").split(/ +/):[n],a=0,o=t.items.length;a<o;a++)r.item(t.items[a],s,i)},item:function(t,e,n){for(var s=!0,i=0;i<n.length;i++){for(var a=!1,o=0,l=e.length;o<l;o++)r.values(t.values(),e[o],n[i])&&(a=!0);a||(s=!1)}t.found=s},values:function(t,r,n){if(t.hasOwnProperty(r)){var s=i(t[r]).toLowerCase();if(o(s,n,e))return!0}return!1}};return n.bind(a(t.listContainer,e.searchClass),"keyup",t.utils.events.debounce((function(e){var n=e.target||e.srcElement;t.search(n.value,r.search)}),t.searchDelay)),function(e,n){t.search(e,n,r.search)}}},"./src/index.js":function(t,e,r){var n=r("./node_modules/string-natural-compare/natural-compare.js"),s=r("./src/utils/get-by-class.js"),i=r("./src/utils/extend.js"),a=r("./src/utils/index-of.js"),o=r("./src/utils/events.js"),l=r("./src/utils/to-string.js"),u=r("./src/utils/classes.js"),c=r("./src/utils/get-attribute.js"),f=r("./src/utils/to-array.js");t.exports=function(t,e,h){var d,v=this,g=r("./src/item.js")(v),m=r("./src/add-async.js")(v),p=r("./src/pagination.js")(v);d={start:function(){v.listClass="list",v.searchClass="search",v.sortClass="sort",v.page=1e4,v.i=1,v.items=[],v.visibleItems=[],v.matchingItems=[],v.searched=!1,v.filtered=!1,v.searchColumns=void 0,v.searchDelay=0,v.handlers={updated:[]},v.valueNames=[],v.utils={getByClass:s,extend:i,indexOf:a,events:o,toString:l,naturalSort:n,classes:u,getAttribute:c,toArray:f},v.utils.extend(v,e),v.listContainer="string"==typeof t?document.getElementById(t):t,v.listContainer&&(v.list=s(v.listContainer,v.listClass,!0),v.parse=r("./src/parse.js")(v),v.templater=r("./src/templater.js")(v),v.search=r("./src/search.js")(v),v.filter=r("./src/filter.js")(v),v.sort=r("./src/sort.js")(v),v.fuzzySearch=r("./src/fuzzy-search.js")(v,e.fuzzySearch),this.handlers(),this.items(),this.pagination(),v.update())},handlers:function(){for(var t in v.handlers)v[t]&&v.handlers.hasOwnProperty(t)&&v.on(t,v[t])},items:function(){v.parse(v.list),void 0!==h&&v.add(h)},pagination:function(){if(void 0!==e.pagination){!0===e.pagination&&(e.pagination=[{}]),void 0===e.pagination[0]&&(e.pagination=[e.pagination]);for(var t=0,r=e.pagination.length;t<r;t++)p(e.pagination[t])}}},this.reIndex=function(){v.items=[],v.visibleItems=[],v.matchingItems=[],v.searched=!1,v.filtered=!1,v.parse(v.list)},this.toJSON=function(){for(var t=[],e=0,r=v.items.length;e<r;e++)t.push(v.items[e].values());return t},this.add=function(t,e){if(0!==t.length){if(!e){var r=[],n=!1;void 0===t[0]&&(t=[t]);for(var s=0,i=t.length;s<i;s++){var a;n=v.items.length>v.page,a=new g(t[s],void 0,n),v.items.push(a),r.push(a)}return v.update(),r}m(t.slice(0),e)}},this.show=function(t,e){return this.i=t,this.page=e,v.update(),v},this.remove=function(t,e,r){for(var n=0,s=0,i=v.items.length;s<i;s++)v.items[s].values()[t]==e&&(v.templater.remove(v.items[s],r),v.items.splice(s,1),i--,s--,n++);return v.update(),n},this.get=function(t,e){for(var r=[],n=0,s=v.items.length;n<s;n++){var i=v.items[n];i.values()[t]==e&&r.push(i)}return r},this.size=function(){return v.items.length},this.clear=function(){return v.templater.clear(),v.items=[],v},this.on=function(t,e){return v.handlers[t].push(e),v},this.off=function(t,e){var r=v.handlers[t],n=a(r,e);return n>-1&&r.splice(n,1),v},this.trigger=function(t){for(var e=v.handlers[t].length;e--;)v.handlers[t][e](v);return v},this.reset={filter:function(){for(var t=v.items,e=t.length;e--;)t[e].filtered=!1;return v},search:function(){for(var t=v.items,e=t.length;e--;)t[e].found=!1;return v}},this.update=function(){var t=v.items,e=t.length;v.visibleItems=[],v.matchingItems=[],v.templater.clear();for(var r=0;r<e;r++)t[r].matching()&&v.matchingItems.length+1>=v.i&&v.visibleItems.length<v.page?(t[r].show(),v.visibleItems.push(t[r]),v.matchingItems.push(t[r])):t[r].matching()?(v.matchingItems.push(t[r]),t[r].hide()):t[r].hide();return v.trigger("updated"),v},d.start()}},"./src/item.js":function(t){t.exports=function(t){return function(e,r,n){var s=this;this._values={},this.found=!1,this.filtered=!1;this.values=function(e,r){if(void 0===e)return s._values;for(var n in e)s._values[n]=e[n];!0!==r&&t.templater.set(s,s.values())},this.show=function(){t.templater.show(s)},this.hide=function(){t.templater.hide(s)},this.matching=function(){return t.filtered&&t.searched&&s.found&&s.filtered||t.filtered&&!t.searched&&s.filtered||!t.filtered&&t.searched&&s.found||!t.filtered&&!t.searched},this.visible=function(){return!(!s.elm||s.elm.parentNode!=t.list)},function(e,r,n){if(void 0===r)n?s.values(e,n):s.values(e);else{s.elm=r;var i=t.templater.get(s,e);s.values(i)}}(e,r,n)}}},"./src/pagination.js":function(t,e,r){var n=r("./src/utils/classes.js"),s=r("./src/utils/events.js"),i=r("./src/index.js");t.exports=function(t){var e=!1,r=function(r,s){if(t.page<1)return t.listContainer.style.display="none",void(e=!0);e&&(t.listContainer.style.display="block");var i,o=t.matchingItems.length,l=t.i,u=t.page,c=Math.ceil(o/u),f=Math.ceil(l/u),h=s.innerWindow||2,d=s.left||s.outerWindow||0,v=s.right||s.outerWindow||0;v=c-v,r.clear();for(var g=1;g<=c;g++){var m=f===g?"active":"";a.number(g,d,v,f,h)?(i=r.add({page:g,dotted:!1})[0],m&&n(i.elm).add(m),i.elm.firstChild.setAttribute("data-i",g),i.elm.firstChild.setAttribute("data-page",u)):a.dotted(r,g,d,v,f,h,r.size())&&(i=r.add({page:"...",dotted:!0})[0],n(i.elm).add("disabled"))}},a={number:function(t,e,r,n,s){return this.left(t,e)||this.right(t,r)||this.innerWindow(t,n,s)},left:function(t,e){return t<=e},right:function(t,e){return t>e},innerWindow:function(t,e,r){return t>=e-r&&t<=e+r},dotted:function(t,e,r,n,s,i,a){return this.dottedLeft(t,e,r,n,s,i)||this.dottedRight(t,e,r,n,s,i,a)},dottedLeft:function(t,e,r,n,s,i){return e==r+1&&!this.innerWindow(e,s,i)&&!this.right(e,n)},dottedRight:function(t,e,r,n,s,i,a){return!t.items[a-1].values().dotted&&(e==n&&!this.innerWindow(e,s,i)&&!this.right(e,n))}};return function(e){var n=new i(t.listContainer.id,{listClass:e.paginationClass||"pagination",item:e.item||"<li><a class='page' href='#'></a></li>",valueNames:["page","dotted"],searchClass:"pagination-search-that-is-not-supposed-to-exist",sortClass:"pagination-sort-that-is-not-supposed-to-exist"});s.bind(n.listContainer,"click",(function(e){var r=e.target||e.srcElement,n=t.utils.getAttribute(r,"data-page"),s=t.utils.getAttribute(r,"data-i");s&&t.show((s-1)*n+1,n)})),t.on("updated",(function(){r(n,e)})),r(n,e)}}},"./src/parse.js":function(t,e,r){t.exports=function(t){var e=r("./src/item.js")(t),n=function(r,n){for(var s=0,i=r.length;s<i;s++)t.items.push(new e(n,r[s]))},s=function e(r,s){var i=r.splice(0,50);n(i,s),r.length>0?setTimeout((function(){e(r,s)}),1):(t.update(),t.trigger("parseComplete"))};return t.handlers.parseComplete=t.handlers.parseComplete||[],function(){var e=function(t){for(var e=t.childNodes,r=[],n=0,s=e.length;n<s;n++)void 0===e[n].data&&r.push(e[n]);return r}(t.list),r=t.valueNames;t.indexAsync?s(e,r):n(e,r)}}},"./src/search.js":function(t){t.exports=function(t){var e,r,n,s={resetList:function(){t.i=1,t.templater.clear(),n=void 0},setOptions:function(t){2==t.length&&t[1]instanceof Array?e=t[1]:2==t.length&&"function"==typeof t[1]?(e=void 0,n=t[1]):3==t.length?(e=t[1],n=t[2]):e=void 0},setColumns:function(){0!==t.items.length&&void 0===e&&(e=void 0===t.searchColumns?s.toArray(t.items[0].values()):t.searchColumns)},setSearchString:function(e){e=(e=t.utils.toString(e).toLowerCase()),r=e},toArray:function(t){var e=[];for(var r in t)e.push(r);return e}},i=function(){for(var n,s=[],i=r;null!==(n=i.match(/"([^"]+)"/));)s.push(n[1]),i=i.substring(0,n.index)+i.substring(n.index+n[0].length);(i=i.trim()).length&&(s=s.concat(i.split(/\s+/)));for(var a=0,o=t.items.length;a<o;a++){var l=t.items[a];if(l.found=!1,s.length){for(var u=0,c=s.length;u<c;u++){for(var f=!1,h=0,d=e.length;h<d;h++){var v=l.values(),g=e[h];if(v.hasOwnProperty(g)&&void 0!==v[g]&&null!==v[g])if(-1!==("string"!=typeof v[g]?v[g].toString():v[g]).toLowerCase().indexOf(s[u])){f=!0;break}}if(!f)break}l.found=f}}},a=function(){t.reset.search(),t.searched=!1},o=function(o){return t.trigger("searchStart"),s.resetList(),s.setSearchString(o),s.setOptions(arguments),s.setColumns(),""===r?a():(t.searched=!0,n?n(r,e):i()),t.update(),t.trigger("searchComplete"),t.visibleItems};return t.handlers.searchStart=t.handlers.searchStart||[],t.handlers.searchComplete=t.handlers.searchComplete||[],t.utils.events.bind(t.utils.getByClass(t.listContainer,t.searchClass),"keyup",t.utils.events.debounce((function(e){var r=e.target||e.srcElement;""===r.value&&!t.searched||o(r.value)}),t.searchDelay)),t.utils.events.bind(t.utils.getByClass(t.listContainer,t.searchClass),"input",(function(t){""===(t.target||t.srcElement).value&&o("")})),o}},"./src/sort.js":function(t){t.exports=function(t){var e={els:void 0,clear:function(){for(var r=0,n=e.els.length;r<n;r++)t.utils.classes(e.els[r]).remove("asc"),t.utils.classes(e.els[r]).remove("desc")},getOrder:function(e){var r=t.utils.getAttribute(e,"data-order");return"asc"==r||"desc"==r?r:t.utils.classes(e).has("desc")?"asc":t.utils.classes(e).has("asc")?"desc":"asc"},getInSensitive:function(e,r){var n=t.utils.getAttribute(e,"data-insensitive");r.insensitive="false"!==n},setOrder:function(r){for(var n=0,s=e.els.length;n<s;n++){var i=e.els[n];if(t.utils.getAttribute(i,"data-sort")===r.valueName){var a=t.utils.getAttribute(i,"data-order");"asc"==a||"desc"==a?a==r.order&&t.utils.classes(i).add(r.order):t.utils.classes(i).add(r.order)}}}},r=function(){t.trigger("sortStart");var r={},n=arguments[0].currentTarget||arguments[0].srcElement||void 0;n?(r.valueName=t.utils.getAttribute(n,"data-sort"),e.getInSensitive(n,r),r.order=e.getOrder(n)):((r=arguments[1]||r).valueName=arguments[0],r.order=r.order||"asc",r.insensitive=void 0===r.insensitive||r.insensitive),e.clear(),e.setOrder(r);var s,i=r.sortFunction||t.sortFunction||null,a="desc"===r.order?-1:1;s=i?function(t,e){return i(t,e,r)*a}:function(e,n){var s=t.utils.naturalSort;return s.alphabet=t.alphabet||r.alphabet||void 0,!s.alphabet&&r.insensitive&&(s=t.utils.naturalSort.caseInsensitive),s(e.values()[r.valueName],n.values()[r.valueName])*a},t.items.sort(s),t.update(),t.trigger("sortComplete")};return t.handlers.sortStart=t.handlers.sortStart||[],t.handlers.sortComplete=t.handlers.sortComplete||[],e.els=t.utils.getByClass(t.listContainer,t.sortClass),t.utils.events.bind(e.els,"click",r),t.on("searchStart",e.clear),t.on("filterStart",e.clear),r}},"./src/templater.js":function(t){var e=function(t){var e,r=this,n=function(e,r){var n=e.cloneNode(!0);n.removeAttribute("id");for(var s=0,i=r.length;s<i;s++){var a=void 0,o=r[s];if(o.data)for(var l=0,u=o.data.length;l<u;l++)n.setAttribute("data-"+o.data[l],"");else o.attr&&o.name?(a=t.utils.getByClass(n,o.name,!0))&&a.setAttribute(o.attr,""):(a=t.utils.getByClass(n,o,!0))&&(a.innerHTML="")}return n},s=function(){for(var e=t.list.childNodes,r=0,n=e.length;r<n;r++)if(void 0===e[r].data)return e[r].cloneNode(!0)},i=function(t){if("string"==typeof t){if(/<tr[\s>]/g.exec(t)){var e=document.createElement("tbody");return e.innerHTML=t,e.firstElementChild}if(-1!==t.indexOf("<")){var r=document.createElement("div");return r.innerHTML=t,r.firstElementChild}}},a=function(e,r,n){var s=void 0,i=function(e){for(var r=0,n=t.valueNames.length;r<n;r++){var s=t.valueNames[r];if(s.data){for(var i=s.data,a=0,o=i.length;a<o;a++)if(i[a]===e)return{data:e}}else{if(s.attr&&s.name&&s.name==e)return s;if(s===e)return e}}}(r);i&&(i.data?e.elm.setAttribute("data-"+i.data,n):i.attr&&i.name?(s=t.utils.getByClass(e.elm,i.name,!0))&&s.setAttribute(i.attr,n):(s=t.utils.getByClass(e.elm,i,!0))&&(s.innerHTML=n))};this.get=function(e,n){r.create(e);for(var s={},i=0,a=n.length;i<a;i++){var o=void 0,l=n[i];if(l.data)for(var u=0,c=l.data.length;u<c;u++)s[l.data[u]]=t.utils.getAttribute(e.elm,"data-"+l.data[u]);else l.attr&&l.name?(o=t.utils.getByClass(e.elm,l.name,!0),s[l.name]=o?t.utils.getAttribute(o,l.attr):""):(o=t.utils.getByClass(e.elm,l,!0),s[l]=o?o.innerHTML:"")}return s},this.set=function(t,e){if(!r.create(t))for(var n in e)e.hasOwnProperty(n)&&a(t,n,e[n])},this.create=function(t){return void 0===t.elm&&(t.elm=e(t.values()),r.set(t,t.values()),!0)},this.remove=function(e){e.elm.parentNode===t.list&&t.list.removeChild(e.elm)},this.show=function(e){r.create(e),t.list.appendChild(e.elm)},this.hide=function(e){void 0!==e.elm&&e.elm.parentNode===t.list&&t.list.removeChild(e.elm)},this.clear=function(){if(t.list.hasChildNodes())for(;t.list.childNodes.length>=1;)t.list.removeChild(t.list.firstChild)},function(){var r;if("function"!=typeof t.item){if(!(r="string"==typeof t.item?-1===t.item.indexOf("<")?document.getElementById(t.item):i(t.item):s()))throw new Error("The list needs to have at least one item on init otherwise you'll have to add a template.");r=n(r,t.valueNames),e=function(){return r.cloneNode(!0)}}else e=function(e){var r=t.item(e);return i(r)}}()};t.exports=function(t){return new e(t)}},"./src/utils/classes.js":function(t,e,r){var n=r("./src/utils/index-of.js"),s=/\s+/;Object.prototype.toString;function i(t){if(!t||!t.nodeType)throw new Error("A DOM element reference is required");this.el=t,this.list=t.classList}t.exports=function(t){return new i(t)},i.prototype.add=function(t){if(this.list)return this.list.add(t),this;var e=this.array();return~n(e,t)||e.push(t),this.el.className=e.join(" "),this},i.prototype.remove=function(t){if(this.list)return this.list.remove(t),this;var e=this.array(),r=n(e,t);return~r&&e.splice(r,1),this.el.className=e.join(" "),this},i.prototype.toggle=function(t,e){return this.list?(void 0!==e?e!==this.list.toggle(t,e)&&this.list.toggle(t):this.list.toggle(t),this):(void 0!==e?e?this.add(t):this.remove(t):this.has(t)?this.remove(t):this.add(t),this)},i.prototype.array=function(){var t=(this.el.getAttribute("class")||"").replace(/^\s+|\s+$/g,"").split(s);return""===t[0]&&t.shift(),t},i.prototype.has=i.prototype.contains=function(t){return this.list?this.list.contains(t):!!~n(this.array(),t)}},"./src/utils/events.js":function(t,e,r){var n=window.addEventListener?"addEventListener":"attachEvent",s=window.removeEventListener?"removeEventListener":"detachEvent",i="addEventListener"!==n?"on":"",a=r("./src/utils/to-array.js");e.bind=function(t,e,r,s){for(var o=0,l=(t=a(t)).length;o<l;o++)t[o][n](i+e,r,s||!1)},e.unbind=function(t,e,r,n){for(var o=0,l=(t=a(t)).length;o<l;o++)t[o][s](i+e,r,n||!1)},e.debounce=function(t,e,r){var n;return e?function(){var s=this,i=arguments,a=function(){n=null,r||t.apply(s,i)},o=r&&!n;clearTimeout(n),n=setTimeout(a,e),o&&t.apply(s,i)}:t}},"./src/utils/extend.js":function(t){t.exports=function(t){for(var e,r=Array.prototype.slice.call(arguments,1),n=0;e=r[n];n++)if(e)for(var s in e)t[s]=e[s];return t}},"./src/utils/fuzzy.js":function(t){t.exports=function(t,e,r){var n=r.location||0,s=r.distance||100,i=r.threshold||.4;if(e===t)return!0;if(e.length>32)return!1;var a=n,o=function(){var t,r={};for(t=0;t<e.length;t++)r[e.charAt(t)]=0;for(t=0;t<e.length;t++)r[e.charAt(t)]|=1<<e.length-t-1;return r}();function l(t,r){var n=t/e.length,i=Math.abs(a-r);return s?n+i/s:i?1:n}var u=i,c=t.indexOf(e,a);-1!=c&&(u=Math.min(l(0,c),u),-1!=(c=t.lastIndexOf(e,a+e.length))&&(u=Math.min(l(0,c),u)));var f,h,d=1<<e.length-1;c=-1;for(var v,g=e.length+t.length,m=0;m<e.length;m++){for(f=0,h=g;f<h;)l(m,a+h)<=u?f=h:g=h,h=Math.floor((g-f)/2+f);g=h;var p=Math.max(1,a-h+1),y=Math.min(a+h,t.length)+e.length,C=Array(y+2);C[y+1]=(1<<m)-1;for(var b=y;b>=p;b--){var j=o[t.charAt(b-1)];if(C[b]=0===m?(C[b+1]<<1|1)&j:(C[b+1]<<1|1)&j|(v[b+1]|v[b])<<1|1|v[b+1],C[b]&d){var x=l(m,b-1);if(x<=u){if(u=x,!((c=b-1)>a))break;p=Math.max(1,2*a-c)}}}if(l(m+1,a)>u)break;v=C}return!(c<0)}},"./src/utils/get-attribute.js":function(t){t.exports=function(t,e){var r=t.getAttribute&&t.getAttribute(e)||null;if(!r)for(var n=t.attributes,s=n.length,i=0;i<s;i++)void 0!==n[i]&&n[i].nodeName===e&&(r=n[i].nodeValue);return r}},"./src/utils/get-by-class.js":function(t){t.exports=function(t,e,r,n){return(n=n||{}).test&&n.getElementsByClassName||!n.test&&document.getElementsByClassName?function(t,e,r){return r?t.getElementsByClassName(e)[0]:t.getElementsByClassName(e)}(t,e,r):n.test&&n.querySelector||!n.test&&document.querySelector?function(t,e,r){return e="."+e,r?t.querySelector(e):t.querySelectorAll(e)}(t,e,r):function(t,e,r){for(var n=[],s=t.getElementsByTagName("*"),i=s.length,a=new RegExp("(^|\\s)"+e+"(\\s|$)"),o=0,l=0;o<i;o++)if(a.test(s[o].className)){if(r)return s[o];n[l]=s[o],l++}return n}(t,e,r)}},"./src/utils/index-of.js":function(t){var e=[].indexOf;t.exports=function(t,r){if(e)return t.indexOf(r);for(var n=0,s=t.length;n<s;++n)if(t[n]===r)return n;return-1}},"./src/utils/to-array.js":function(t){t.exports=function(t){if(void 0===t)return[];if(null===t)return[null];if(t===window)return[window];if("string"==typeof t)return[t];if(function(t){return"[object Array]"===Object.prototype.toString.call(t)}(t))return t;if("number"!=typeof t.length)return[t];if("function"==typeof t&&t instanceof Function)return[t];for(var e=[],r=0,n=t.length;r<n;r++)(Object.prototype.hasOwnProperty.call(t,r)||r in t)&&e.push(t[r]);return e.length?e:[]}},"./src/utils/to-string.js":function(t){t.exports=function(t){return t=(t=null===(t=void 0===t?"":t)?"":t).toString()}},"./node_modules/string-natural-compare/natural-compare.js":function(t){"use strict";var e,r,n=0;function s(t){return t>=48&&t<=57}function i(t,e){for(var i=(t+="").length,a=(e+="").length,o=0,l=0;o<i&&l<a;){var u=t.charCodeAt(o),c=e.charCodeAt(l);if(s(u)){if(!s(c))return u-c;for(var f=o,h=l;48===u&&++f<i;)u=t.charCodeAt(f);for(;48===c&&++h<a;)c=e.charCodeAt(h);for(var d=f,v=h;d<i&&s(t.charCodeAt(d));)++d;for(;v<a&&s(e.charCodeAt(v));)++v;var g=d-f-v+h;if(g)return g;for(;f<d;)if(g=t.charCodeAt(f++)-e.charCodeAt(h++))return g;o=d,l=v}else{if(u!==c)return u<n&&c<n&&-1!==r[u]&&-1!==r[c]?r[u]-r[c]:u-c;++o,++l}}return o>=i&&l<a&&i>=a?-1:l>=a&&o<i&&a>=i?1:i-a}i.caseInsensitive=i.i=function(t,e){return i((""+t).toLowerCase(),(""+e).toLowerCase())},Object.defineProperties(i,{alphabet:{get:function(){return e},set:function(t){r=[];var s=0;if(e=t)for(;s<e.length;s++)r[e.charCodeAt(s)]=s;for(n=r.length,s=0;s<n;s++)void 0===r[s]&&(r[s]=-1)}}}),t.exports=i}},e={};return function r(n){if(e[n])return e[n].exports;var s=e[n]={exports:{}};return t[n](s,s.exports,r),s.exports}("./src/index.js")}();
+//# sourceMappingURL=list.min.js.map
+\ No newline at end of file
diff --git a/_freeze/site_libs/quarto-listing/quarto-listing.js b/_freeze/site_libs/quarto-listing/quarto-listing.js
@@ -0,0 +1,254 @@
+const kProgressiveAttr = "data-src";
+let categoriesLoaded = false;
+
+window.quartoListingCategory = (category) => {
+ // category is URI encoded in EJS template for UTF-8 support
+ category = decodeURIComponent(atob(category));
+ if (categoriesLoaded) {
+ activateCategory(category);
+ setCategoryHash(category);
+ }
+};
+
+window["quarto-listing-loaded"] = () => {
+ // Process any existing hash
+ const hash = getHash();
+
+ if (hash) {
+ // If there is a category, switch to that
+ if (hash.category) {
+ // category hash are URI encoded so we need to decode it before processing
+ // so that we can match it with the category element processed in JS
+ activateCategory(decodeURIComponent(hash.category));
+ }
+ // Paginate a specific listing
+ const listingIds = Object.keys(window["quarto-listings"]);
+ for (const listingId of listingIds) {
+ const page = hash[getListingPageKey(listingId)];
+ if (page) {
+ showPage(listingId, page);
+ }
+ }
+ }
+
+ const listingIds = Object.keys(window["quarto-listings"]);
+ for (const listingId of listingIds) {
+ // The actual list
+ const list = window["quarto-listings"][listingId];
+
+ // Update the handlers for pagination events
+ refreshPaginationHandlers(listingId);
+
+ // Render any visible items that need it
+ renderVisibleProgressiveImages(list);
+
+ // Whenever the list is updated, we also need to
+ // attach handlers to the new pagination elements
+ // and refresh any newly visible items.
+ list.on("updated", function () {
+ renderVisibleProgressiveImages(list);
+ setTimeout(() => refreshPaginationHandlers(listingId));
+
+ // Show or hide the no matching message
+ toggleNoMatchingMessage(list);
+ });
+ }
+};
+
+window.document.addEventListener("DOMContentLoaded", function (_event) {
+ // Attach click handlers to categories
+ const categoryEls = window.document.querySelectorAll(
+ ".quarto-listing-category .category"
+ );
+
+ for (const categoryEl of categoryEls) {
+ // category needs to support non ASCII characters
+ const category = decodeURIComponent(
+ atob(categoryEl.getAttribute("data-category"))
+ );
+ categoryEl.onclick = () => {
+ activateCategory(category);
+ setCategoryHash(category);
+ };
+ }
+
+ // Attach a click handler to the category title
+ // (there should be only one, but since it is a class name, handle N)
+ const categoryTitleEls = window.document.querySelectorAll(
+ ".quarto-listing-category-title"
+ );
+ for (const categoryTitleEl of categoryTitleEls) {
+ categoryTitleEl.onclick = () => {
+ activateCategory("");
+ setCategoryHash("");
+ };
+ }
+
+ categoriesLoaded = true;
+});
+
+function toggleNoMatchingMessage(list) {
+ const selector = `#${list.listContainer.id} .listing-no-matching`;
+ const noMatchingEl = window.document.querySelector(selector);
+ if (noMatchingEl) {
+ if (list.visibleItems.length === 0) {
+ noMatchingEl.classList.remove("d-none");
+ } else {
+ if (!noMatchingEl.classList.contains("d-none")) {
+ noMatchingEl.classList.add("d-none");
+ }
+ }
+ }
+}
+
+function setCategoryHash(category) {
+ setHash({ category });
+}
+
+function setPageHash(listingId, page) {
+ const currentHash = getHash() || {};
+ currentHash[getListingPageKey(listingId)] = page;
+ setHash(currentHash);
+}
+
+function getListingPageKey(listingId) {
+ return `${listingId}-page`;
+}
+
+function refreshPaginationHandlers(listingId) {
+ const listingEl = window.document.getElementById(listingId);
+ const paginationEls = listingEl.querySelectorAll(
+ ".pagination li.page-item:not(.disabled) .page.page-link"
+ );
+ for (const paginationEl of paginationEls) {
+ paginationEl.onclick = (sender) => {
+ setPageHash(listingId, sender.target.getAttribute("data-i"));
+ showPage(listingId, sender.target.getAttribute("data-i"));
+ return false;
+ };
+ }
+}
+
+function renderVisibleProgressiveImages(list) {
+ // Run through the visible items and render any progressive images
+ for (const item of list.visibleItems) {
+ const itemEl = item.elm;
+ if (itemEl) {
+ const progressiveImgs = itemEl.querySelectorAll(
+ `img[${kProgressiveAttr}]`
+ );
+ for (const progressiveImg of progressiveImgs) {
+ const srcValue = progressiveImg.getAttribute(kProgressiveAttr);
+ if (srcValue) {
+ progressiveImg.setAttribute("src", srcValue);
+ }
+ progressiveImg.removeAttribute(kProgressiveAttr);
+ }
+ }
+ }
+}
+
+function getHash() {
+ // Hashes are of the form
+ // #name:value|name1:value1|name2:value2
+ const currentUrl = new URL(window.location);
+ const hashRaw = currentUrl.hash ? currentUrl.hash.slice(1) : undefined;
+ return parseHash(hashRaw);
+}
+
+const kAnd = "&";
+const kEquals = "=";
+
+function parseHash(hash) {
+ if (!hash) {
+ return undefined;
+ }
+ const hasValuesStrs = hash.split(kAnd);
+ const hashValues = hasValuesStrs
+ .map((hashValueStr) => {
+ const vals = hashValueStr.split(kEquals);
+ if (vals.length === 2) {
+ return { name: vals[0], value: vals[1] };
+ } else {
+ return undefined;
+ }
+ })
+ .filter((value) => {
+ return value !== undefined;
+ });
+
+ const hashObj = {};
+ hashValues.forEach((hashValue) => {
+ hashObj[hashValue.name] = decodeURIComponent(hashValue.value);
+ });
+ return hashObj;
+}
+
+function makeHash(obj) {
+ return Object.keys(obj)
+ .map((key) => {
+ return `${key}${kEquals}${obj[key]}`;
+ })
+ .join(kAnd);
+}
+
+function setHash(obj) {
+ const hash = makeHash(obj);
+ window.history.pushState(null, null, `#${hash}`);
+}
+
+function showPage(listingId, page) {
+ const list = window["quarto-listings"][listingId];
+ if (list) {
+ list.show((page - 1) * list.page + 1, list.page);
+ }
+}
+
+function activateCategory(category) {
+ // Deactivate existing categories
+ const activeEls = window.document.querySelectorAll(
+ ".quarto-listing-category .category.active"
+ );
+ for (const activeEl of activeEls) {
+ activeEl.classList.remove("active");
+ }
+
+ // Activate this category
+ const categoryEl = window.document.querySelector(
+ `.quarto-listing-category .category[data-category='${btoa(
+ encodeURIComponent(category)
+ )}']`
+ );
+ if (categoryEl) {
+ categoryEl.classList.add("active");
+ }
+
+ // Filter the listings to this category
+ filterListingCategory(category);
+}
+
+function filterListingCategory(category) {
+ const listingIds = Object.keys(window["quarto-listings"]);
+ for (const listingId of listingIds) {
+ const list = window["quarto-listings"][listingId];
+ if (list) {
+ if (category === "") {
+ // resets the filter
+ list.filter();
+ } else {
+ // filter to this category
+ list.filter(function (item) {
+ const itemValues = item.values();
+ if (itemValues.categories !== null) {
+ const categories = decodeURIComponent(
+ atob(itemValues.categories)
+ ).split(",");
+ return categories.includes(category);
+ } else {
+ return false;
+ }
+ });
+ }
+ }
+ }
+}
diff --git a/_freeze/site_libs/revealjs/dist/reset.css b/_freeze/site_libs/revealjs/dist/reset.css
@@ -0,0 +1,30 @@
+/* http://meyerweb.com/eric/tools/css/reset/
+ v4.0 | 20180602
+ License: none (public domain)
+*/
+
+html, body, div, span, applet, object, iframe,
+h1, h2, h3, h4, h5, h6, p, blockquote, pre,
+a, abbr, acronym, address, big, cite, code,
+del, dfn, em, img, ins, kbd, q, s, samp,
+small, strike, strong, sub, sup, tt, var,
+b, u, i, center,
+dl, dt, dd, ol, ul, li,
+fieldset, form, label, legend,
+table, caption, tbody, tfoot, thead, tr, th, td,
+article, aside, canvas, details, embed,
+figure, figcaption, footer, header, hgroup,
+main, menu, nav, output, ruby, section, summary,
+time, mark, audio, video {
+ margin: 0;
+ padding: 0;
+ border: 0;
+ font-size: 100%;
+ font: inherit;
+ vertical-align: baseline;
+}
+/* HTML5 display-role reset for older browsers */
+article, aside, details, figcaption, figure,
+footer, header, hgroup, main, menu, nav, section {
+ display: block;
+}
+\ No newline at end of file
diff --git a/_freeze/site_libs/revealjs/dist/reveal.css b/_freeze/site_libs/revealjs/dist/reveal.css
@@ -0,0 +1,8 @@
+/*!
+* reveal.js 5.1.0
+* https://revealjs.com
+* MIT licensed
+*
+* Copyright (C) 2011-2024 Hakim El Hattab, https://hakim.se
+*/
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r,o,l=this.element.offsetWidth,d=s.length;r="number"==typeof this.Reveal.getConfig().parallaxBackgroundHorizontal?this.Reveal.getConfig().parallaxBackgroundHorizontal:d>1?(t-l)/(d-1):0,o=r*e.h*-1;let c,h,u=this.element.offsetHeight,g=a.length;c="number"==typeof this.Reveal.getConfig().parallaxBackgroundVertical?this.Reveal.getConfig().parallaxBackgroundVertical:(i-u)/(g-1),h=g>0?c*e.v:0,this.element.style.backgroundPosition=o+"px "+-h+"px"}}destroy(){this.element.remove()}}let k=0;class L{constructor(e){this.Reveal=e}run(e,t){this.reset();let i=this.Reveal.getSlides(),s=i.indexOf(t),a=i.indexOf(e);if(e&&t&&e.hasAttribute("data-auto-animate")&&t.hasAttribute("data-auto-animate")&&e.getAttribute("data-auto-animate-id")===t.getAttribute("data-auto-animate-id")&&!(s>a?t:e).hasAttribute("data-auto-animate-restart")){this.autoAnimateStyleSheet=this.autoAnimateStyleSheet||l();let 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r=this.getAutoAnimatableProperties("from",e,i),o=this.getAutoAnimatableProperties("to",t,i);if(t.classList.contains("fragment")&&(delete o.styles.opacity,e.classList.contains("fragment"))){(e.className.match(w)||[""])[0]===(t.className.match(w)||[""])[0]&&"forward"===s.slideDirection&&t.classList.add("visible","disabled")}if(!1!==i.translate||!1!==i.scale){let e=this.Reveal.getScale(),t={x:(r.x-o.x)/e,y:(r.y-o.y)/e,scaleX:r.width/o.width,scaleY:r.height/o.height};t.x=Math.round(1e3*t.x)/1e3,t.y=Math.round(1e3*t.y)/1e3,t.scaleX=Math.round(1e3*t.scaleX)/1e3,t.scaleX=Math.round(1e3*t.scaleX)/1e3;let s=!1!==i.translate&&(0!==t.x||0!==t.y),a=!1!==i.scale&&(0!==t.scaleX||0!==t.scaleY);if(s||a){let e=[];s&&e.push(`translate(${t.x}px, ${t.y}px)`),a&&e.push(`scale(${t.scaleX}, ${t.scaleY})`),r.styles.transform=e.join(" "),r.styles["transform-origin"]="top left",o.styles.transform="none"}}for(let e in o.styles){const t=o.styles[e],i=r.styles[e];t===i?delete o.styles[e]:(!0===t.explicitValue&&(o.styles[e]=t.value),!0===i.explicitValue&&(r.styles[e]=i.value))}let l="",d=Object.keys(o.styles);if(d.length>0){r.styles.transition="none",o.styles.transition=`all ${n.duration}s ${n.easing} ${n.delay}s`,o.styles["transition-property"]=d.join(", "),o.styles["will-change"]=d.join(", "),l='[data-auto-animate-target="'+a+'"] {'+Object.keys(r.styles).map((e=>e+": "+r.styles[e]+" !important;")).join("")+'}[data-auto-animate="running"] [data-auto-animate-target="'+a+'"] {'+Object.keys(o.styles).map((e=>e+": "+o.styles[e]+" !important;")).join("")+"}"}return l}getAutoAnimateOptions(t,i){let s={easing:this.Reveal.getConfig().autoAnimateEasing,duration:this.Reveal.getConfig().autoAnimateDuration,delay:0};if(s=e(s,i),t.parentNode){let e=r(t.parentNode,"[data-auto-animate-target]");e&&(s=this.getAutoAnimateOptions(e,s))}return t.dataset.autoAnimateEasing&&(s.easing=t.dataset.autoAnimateEasing),t.dataset.autoAnimateDuration&&(s.duration=parseFloat(t.dataset.autoAnimateDuration)),t.dataset.autoAnimateDelay&&(s.delay=parseFloat(t.dataset.autoAnimateDelay)),s}getAutoAnimatableProperties(e,t,i){let s=this.Reveal.getConfig(),a={styles:[]};if(!1!==i.translate||!1!==i.scale){let e;if("function"==typeof i.measure)e=i.measure(t);else if(s.center)e=t.getBoundingClientRect();else{let i=this.Reveal.getScale();e={x:t.offsetLeft*i,y:t.offsetTop*i,width:t.offsetWidth*i,height:t.offsetHeight*i}}a.x=e.x,a.y=e.y,a.width=e.width,a.height=e.height}const n=getComputedStyle(t);return(i.styles||s.autoAnimateStyles).forEach((t=>{let i;"string"==typeof t&&(t={property:t}),void 0!==t.from&&"from"===e?i={value:t.from,explicitValue:!0}:void 0!==t.to&&"to"===e?i={value:t.to,explicitValue:!0}:("line-height"===t.property&&(i=parseFloat(n["line-height"])/parseFloat(n["font-size"])),isNaN(i)&&(i=n[t.property])),""!==i&&(a.styles[t.property]=i)})),a}getAutoAnimatableElements(e,t){let i=("function"==typeof this.Reveal.getConfig().autoAnimateMatcher?this.Reveal.getConfig().autoAnimateMatcher:this.getAutoAnimatePairs).call(this,e,t),s=[];return i.filter(((e,t)=>{if(-1===s.indexOf(e.to))return s.push(e.to),!0}))}getAutoAnimatePairs(e,t){let i=[];const s="h1, h2, h3, h4, h5, h6, p, li";return this.findAutoAnimateMatches(i,e,t,"[data-id]",(e=>e.nodeName+":::"+e.getAttribute("data-id"))),this.findAutoAnimateMatches(i,e,t,s,(e=>e.nodeName+":::"+e.innerText)),this.findAutoAnimateMatches(i,e,t,"img, video, iframe",(e=>e.nodeName+":::"+(e.getAttribute("src")||e.getAttribute("data-src")))),this.findAutoAnimateMatches(i,e,t,"pre",(e=>e.nodeName+":::"+e.innerText)),i.forEach((e=>{n(e.from,s)?e.options={scale:!1}:n(e.from,"pre")&&(e.options={scale:!1,styles:["width","height"]},this.findAutoAnimateMatches(i,e.from,e.to,".hljs .hljs-ln-code",(e=>e.textContent),{scale:!1,styles:[],measure:this.getLocalBoundingBox.bind(this)}),this.findAutoAnimateMatches(i,e.from,e.to,".hljs .hljs-ln-numbers[data-line-number]",(e=>e.getAttribute("data-line-number")),{scale:!1,styles:["width"],measure:this.getLocalBoundingBox.bind(this)}))}),this),i}getLocalBoundingBox(e){const t=this.Reveal.getScale();return{x:Math.round(e.offsetLeft*t*100)/100,y:Math.round(e.offsetTop*t*100)/100,width:Math.round(e.offsetWidth*t*100)/100,height:Math.round(e.offsetHeight*t*100)/100}}findAutoAnimateMatches(e,t,i,s,a,n){let r={},o={};[].slice.call(t.querySelectorAll(s)).forEach(((e,t)=>{const i=a(e);"string"==typeof i&&i.length&&(r[i]=r[i]||[],r[i].push(e))})),[].slice.call(i.querySelectorAll(s)).forEach(((t,i)=>{const s=a(t);let l;if(o[s]=o[s]||[],o[s].push(t),r[s]){const e=o[s].length-1,t=r[s].length-1;r[s][e]?(l=r[s][e],r[s][e]=null):r[s][t]&&(l=r[s][t],r[s][t]=null)}l&&e.push({from:l,to:t,options:n})}))}getUnmatchedAutoAnimateElements(e){return[].slice.call(e.children).reduce(((e,t)=>{const i=t.querySelector("[data-auto-animate-target]");return t.hasAttribute("data-auto-animate-target")||i||e.push(t),t.querySelector("[data-auto-animate-target]")&&(e=e.concat(this.getUnmatchedAutoAnimateElements(t))),e}),[])}}class C{constructor(e){this.Reveal=e,this.active=!1,this.activatedCallbacks=[],this.onScroll=this.onScroll.bind(this)}activate(){if(this.active)return;const e=this.Reveal.getState();this.active=!0,this.slideHTMLBeforeActivation=this.Reveal.getSlidesElement().innerHTML;const i=t(this.Reveal.getRevealElement(),f),s=t(this.Reveal.getRevealElement(),".backgrounds>.slide-background");let a;this.viewportElement.classList.add("loading-scroll-mode","reveal-scroll");const n=window.getComputedStyle(this.viewportElement);n&&n.background&&(a=n.background);const r=[],o=i[0].parentNode;let l;const d=(e,t,i,n)=>{let o;if(l&&this.Reveal.shouldAutoAnimateBetween(l,e))o=document.createElement("div"),o.className="scroll-page-content scroll-auto-animate-page",o.style.display="none",l.closest(".scroll-page-content").parentNode.appendChild(o);else{const e=document.createElement("div");if(e.className="scroll-page",r.push(e),n&&s.length>t){const i=s[t],n=window.getComputedStyle(i);n&&n.background?e.style.background=n.background:a&&(e.style.background=a)}else a&&(e.style.background=a);const i=document.createElement("div");i.className="scroll-page-sticky",e.appendChild(i),o=document.createElement("div"),o.className="scroll-page-content",i.appendChild(o)}o.appendChild(e),e.classList.remove("past","future"),e.setAttribute("data-index-h",t),e.setAttribute("data-index-v",i),e.slideBackgroundElement&&(e.slideBackgroundElement.remove("past","future"),o.insertBefore(e.slideBackgroundElement,e)),l=e};i.forEach(((e,t)=>{this.Reveal.isVerticalStack(e)?e.querySelectorAll("section").forEach(((e,i)=>{d(e,t,i,!0)})):d(e,t,0)}),this),this.createProgressBar(),t(this.Reveal.getRevealElement(),".stack").forEach((e=>e.remove())),r.forEach((e=>o.appendChild(e))),this.Reveal.slideContent.layout(this.Reveal.getSlidesElement()),this.Reveal.layout(),this.Reveal.setState(e),this.activatedCallbacks.forEach((e=>e())),this.activatedCallbacks=[],this.restoreScrollPosition(),this.viewportElement.classList.remove("loading-scroll-mode"),this.viewportElement.addEventListener("scroll",this.onScroll,{passive:!0})}deactivate(){if(!this.active)return;const e=this.Reveal.getState();this.active=!1,this.viewportElement.removeEventListener("scroll",this.onScroll),this.viewportElement.classList.remove("reveal-scroll"),this.removeProgressBar(),this.Reveal.getSlidesElement().innerHTML=this.slideHTMLBeforeActivation,this.Reveal.sync(),this.Reveal.setState(e),this.slideHTMLBeforeActivation=null}toggle(e){"boolean"==typeof e?e?this.activate():this.deactivate():this.isActive()?this.deactivate():this.activate()}isActive(){return this.active}createProgressBar(){this.progressBar=document.createElement("div"),this.progressBar.className="scrollbar",this.progressBarInner=document.createElement("div"),this.progressBarInner.className="scrollbar-inner",this.progressBar.appendChild(this.progressBarInner),this.progressBarPlayhead=document.createElement("div"),this.progressBarPlayhead.className="scrollbar-playhead",this.progressBarInner.appendChild(this.progressBarPlayhead),this.viewportElement.insertBefore(this.progressBar,this.viewportElement.firstChild);const e=e=>{let t=(e.clientY-this.progressBarInner.getBoundingClientRect().top)/this.progressBarHeight;t=Math.max(Math.min(t,1),0),this.viewportElement.scrollTop=t*(this.viewportElement.scrollHeight-this.viewportElement.offsetHeight)},t=i=>{this.draggingProgressBar=!1,this.showProgressBar(),document.removeEventListener("mousemove",e),document.removeEventListener("mouseup",t)};this.progressBarInner.addEventListener("mousedown",(i=>{i.preventDefault(),this.draggingProgressBar=!0,document.addEventListener("mousemove",e),document.addEventListener("mouseup",t),e(i)}))}removeProgressBar(){this.progressBar&&(this.progressBar.remove(),this.progressBar=null)}layout(){this.isActive()&&(this.syncPages(),this.syncScrollPosition())}syncPages(){const e=this.Reveal.getConfig(),t=this.Reveal.getComputedSlideSize(window.innerWidth,window.innerHeight),i=this.Reveal.getScale(),s="compact"===e.scrollLayout,a=this.viewportElement.offsetHeight,n=t.height*i,r=s?n:a;this.scrollTriggerHeight=s?n:a,this.viewportElement.style.setProperty("--page-height",r+"px"),this.viewportElement.style.scrollSnapType="string"==typeof e.scrollSnap?`y ${e.scrollSnap}`:"",this.slideTriggers=[];const o=Array.from(this.Reveal.getRevealElement().querySelectorAll(".scroll-page"));this.pages=o.map((i=>{const n=this.createPage({pageElement:i,slideElement:i.querySelector("section"),stickyElement:i.querySelector(".scroll-page-sticky"),contentElement:i.querySelector(".scroll-page-content"),backgroundElement:i.querySelector(".slide-background"),autoAnimateElements:i.querySelectorAll(".scroll-auto-animate-page"),autoAnimatePages:[]});n.pageElement.style.setProperty("--slide-height",!0===e.center?"auto":t.height+"px"),this.slideTriggers.push({page:n,activate:()=>this.activatePage(n),deactivate:()=>this.deactivatePage(n)}),this.createFragmentTriggersForPage(n),n.autoAnimateElements.length>0&&this.createAutoAnimateTriggersForPage(n);let o=Math.max(n.scrollTriggers.length-1,0);o+=n.autoAnimatePages.reduce(((e,t)=>e+Math.max(t.scrollTriggers.length-1,0)),n.autoAnimatePages.length),n.pageElement.querySelectorAll(".scroll-snap-point").forEach((e=>e.remove()));for(let e=0;e<o+1;e++){const t=document.createElement("div");t.className="scroll-snap-point",t.style.height=this.scrollTriggerHeight+"px",t.style.scrollSnapAlign=s?"center":"start",n.pageElement.appendChild(t),0===e&&(t.style.marginTop=-this.scrollTriggerHeight+"px")}return s&&n.scrollTriggers.length>0?(n.pageHeight=a,n.pageElement.style.setProperty("--page-height",a+"px")):(n.pageHeight=r,n.pageElement.style.removeProperty("--page-height")),n.scrollPadding=this.scrollTriggerHeight*o,n.totalHeight=n.pageHeight+n.scrollPadding,n.pageElement.style.setProperty("--page-scroll-padding",n.scrollPadding+"px"),o>0?(n.stickyElement.style.position="sticky",n.stickyElement.style.top=Math.max((a-n.pageHeight)/2,0)+"px"):(n.stickyElement.style.position="relative",n.pageElement.style.scrollSnapAlign=n.pageHeight<a?"center":"start"),n})),this.setTriggerRanges(),this.viewportElement.setAttribute("data-scrollbar",e.scrollProgress),e.scrollProgress&&this.totalScrollTriggerCount>1?(this.progressBar||this.createProgressBar(),this.syncProgressBar()):this.removeProgressBar()}setTriggerRanges(){this.totalScrollTriggerCount=this.slideTriggers.reduce(((e,t)=>e+Math.max(t.page.scrollTriggers.length,1)),0);let e=0;this.slideTriggers.forEach(((t,i)=>{t.range=[e,e+Math.max(t.page.scrollTriggers.length,1)/this.totalScrollTriggerCount];const s=(t.range[1]-t.range[0])/t.page.scrollTriggers.length;t.page.scrollTriggers.forEach(((t,i)=>{t.range=[e+i*s,e+(i+1)*s]})),e=t.range[1]}))}createFragmentTriggersForPage(e,t){t=t||e.slideElement;const i=this.Reveal.fragments.sort(t.querySelectorAll(".fragment"),!0);return i.length&&(e.fragments=this.Reveal.fragments.sort(t.querySelectorAll(".fragment:not(.disabled)")),e.scrollTriggers.push({activate:()=>{this.Reveal.fragments.update(-1,e.fragments,t)}}),i.forEach(((i,s)=>{e.scrollTriggers.push({activate:()=>{this.Reveal.fragments.update(s,e.fragments,t)}})}))),e.scrollTriggers.length}createAutoAnimateTriggersForPage(e){e.autoAnimateElements.length>0&&this.slideTriggers.push(...Array.from(e.autoAnimateElements).map(((t,i)=>{let s=this.createPage({slideElement:t.querySelector("section"),contentElement:t,backgroundElement:t.querySelector(".slide-background")});return this.createFragmentTriggersForPage(s,s.slideElement),e.autoAnimatePages.push(s),{page:s,activate:()=>this.activatePage(s),deactivate:()=>this.deactivatePage(s)}})))}createPage(e){return e.scrollTriggers=[],e.indexh=parseInt(e.slideElement.getAttribute("data-index-h"),10),e.indexv=parseInt(e.slideElement.getAttribute("data-index-v"),10),e}syncProgressBar(){this.progressBarInner.querySelectorAll(".scrollbar-slide").forEach((e=>e.remove()));const e=this.viewportElement.scrollHeight,t=this.viewportElement.offsetHeight,i=t/e;this.progressBarHeight=this.progressBarInner.offsetHeight,this.playheadHeight=Math.max(i*this.progressBarHeight,8),this.progressBarScrollableHeight=this.progressBarHeight-this.playheadHeight;const s=t/e*this.progressBarHeight,a=Math.min(s/8,4);this.progressBarPlayhead.style.height=this.playheadHeight-a+"px",s>6?this.slideTriggers.forEach((e=>{const{page:t}=e;t.progressBarSlide=document.createElement("div"),t.progressBarSlide.className="scrollbar-slide",t.progressBarSlide.style.top=e.range[0]*this.progressBarHeight+"px",t.progressBarSlide.style.height=(e.range[1]-e.range[0])*this.progressBarHeight-a+"px",t.progressBarSlide.classList.toggle("has-triggers",t.scrollTriggers.length>0),this.progressBarInner.appendChild(t.progressBarSlide),t.scrollTriggerElements=t.scrollTriggers.map(((i,s)=>{const n=document.createElement("div");return n.className="scrollbar-trigger",n.style.top=(i.range[0]-e.range[0])*this.progressBarHeight+"px",n.style.height=(i.range[1]-i.range[0])*this.progressBarHeight-a+"px",t.progressBarSlide.appendChild(n),0===s&&(n.style.display="none"),n}))})):this.pages.forEach((e=>e.progressBarSlide=null))}syncScrollPosition(){const e=this.viewportElement.offsetHeight,t=e/this.viewportElement.scrollHeight,i=this.viewportElement.scrollTop,s=this.viewportElement.scrollHeight-e,a=Math.max(Math.min(i/s,1),0),n=Math.max(Math.min((i+e/2)/this.viewportElement.scrollHeight,1),0);let r;this.slideTriggers.forEach((e=>{const{page:i}=e;a>=e.range[0]-2*t&&a<=e.range[1]+2*t&&!i.loaded?(i.loaded=!0,this.Reveal.slideContent.load(i.slideElement)):i.loaded&&(i.loaded=!1,this.Reveal.slideContent.unload(i.slideElement)),a>=e.range[0]&&a<=e.range[1]?(this.activateTrigger(e),r=e.page):e.active&&this.deactivateTrigger(e)})),r&&r.scrollTriggers.forEach((e=>{n>=e.range[0]&&n<=e.range[1]?this.activateTrigger(e):e.active&&this.deactivateTrigger(e)})),this.setProgressBarValue(i/(this.viewportElement.scrollHeight-e))}setProgressBarValue(e){this.progressBar&&(this.progressBarPlayhead.style.transform=`translateY(${e*this.progressBarScrollableHeight}px)`,this.getAllPages().filter((e=>e.progressBarSlide)).forEach((e=>{e.progressBarSlide.classList.toggle("active",!0===e.active),e.scrollTriggers.forEach(((t,i)=>{e.scrollTriggerElements[i].classList.toggle("active",!0===e.active&&!0===t.active)}))})),this.showProgressBar())}showProgressBar(){this.progressBar.classList.add("visible"),clearTimeout(this.hideProgressBarTimeout),"auto"!==this.Reveal.getConfig().scrollProgress||this.draggingProgressBar||(this.hideProgressBarTimeout=setTimeout((()=>{this.progressBar&&this.progressBar.classList.remove("visible")}),500))}prev(){this.viewportElement.scrollTop-=this.scrollTriggerHeight}next(){this.viewportElement.scrollTop+=this.scrollTriggerHeight}scrollToSlide(e){if(this.active){const t=this.getScrollTriggerBySlide(e);t&&(this.viewportElement.scrollTop=t.range[0]*(this.viewportElement.scrollHeight-this.viewportElement.offsetHeight))}else this.activatedCallbacks.push((()=>this.scrollToSlide(e)))}storeScrollPosition(){clearTimeout(this.storeScrollPositionTimeout),this.storeScrollPositionTimeout=setTimeout((()=>{sessionStorage.setItem("reveal-scroll-top",this.viewportElement.scrollTop),sessionStorage.setItem("reveal-scroll-origin",location.origin+location.pathname),this.storeScrollPositionTimeout=null}),50)}restoreScrollPosition(){const e=sessionStorage.getItem("reveal-scroll-top"),t=sessionStorage.getItem("reveal-scroll-origin");e&&t===location.origin+location.pathname&&(this.viewportElement.scrollTop=parseInt(e,10))}activatePage(e){if(!e.active){e.active=!0;const{slideElement:t,backgroundElement:i,contentElement:s,indexh:a,indexv:n}=e;s.style.display="block",t.classList.add("present"),i&&i.classList.add("present"),this.Reveal.setCurrentScrollPage(t,a,n),this.Reveal.backgrounds.bubbleSlideContrastClassToElement(t,this.viewportElement),Array.from(s.parentNode.querySelectorAll(".scroll-page-content")).forEach((e=>{e!==s&&(e.style.display="none")}))}}deactivatePage(e){e.active&&(e.active=!1,e.slideElement&&e.slideElement.classList.remove("present"),e.backgroundElement&&e.backgroundElement.classList.remove("present"))}activateTrigger(e){e.active||(e.active=!0,e.activate())}deactivateTrigger(e){e.active&&(e.active=!1,e.deactivate&&e.deactivate())}getSlideByIndices(e,t){const i=this.getAllPages().find((i=>i.indexh===e&&i.indexv===t));return i?i.slideElement:null}getScrollTriggerBySlide(e){return this.slideTriggers.find((t=>t.page.slideElement===e))}getAllPages(){return this.pages.flatMap((e=>[e,...e.autoAnimatePages||[]]))}onScroll(){this.syncScrollPosition(),this.storeScrollPosition()}get viewportElement(){return this.Reveal.getViewportElement()}}class x{constructor(e){this.Reveal=e}async activate(){const e=this.Reveal.getConfig(),i=t(this.Reveal.getRevealElement(),m),s=e.slideNumber&&/all|print/i.test(e.showSlideNumber),a=this.Reveal.getComputedSlideSize(window.innerWidth,window.innerHeight),n=Math.floor(a.width*(1+e.margin)),r=Math.floor(a.height*(1+e.margin)),o=a.width,d=a.height;await new Promise(requestAnimationFrame),l("@page{size:"+n+"px "+r+"px; margin: 0px;}"),l(".reveal section>img, .reveal section>video, .reveal section>iframe{max-width: "+o+"px; max-height:"+d+"px}"),document.documentElement.classList.add("reveal-print","print-pdf"),document.body.style.width=n+"px",document.body.style.height=r+"px";const c=this.Reveal.getViewportElement();let h;if(c){const e=window.getComputedStyle(c);e&&e.background&&(h=e.background)}await new Promise(requestAnimationFrame),this.Reveal.layoutSlideContents(o,d),await new Promise(requestAnimationFrame);const u=i.map((e=>e.scrollHeight)),g=[],p=i[0].parentNode;let v=1;i.forEach((function(i,a){if(!1===i.classList.contains("stack")){let l=(n-o)/2,c=(r-d)/2;const p=u[a];let m=Math.max(Math.ceil(p/r),1);m=Math.min(m,e.pdfMaxPagesPerSlide),(1===m&&e.center||i.classList.contains("center"))&&(c=Math.max((r-p)/2,0));const f=document.createElement("div");if(g.push(f),f.className="pdf-page",f.style.height=(r+e.pdfPageHeightOffset)*m+"px",h&&(f.style.background=h),f.appendChild(i),i.style.left=l+"px",i.style.top=c+"px",i.style.width=o+"px",this.Reveal.slideContent.layout(i),i.slideBackgroundElement&&f.insertBefore(i.slideBackgroundElement,i),e.showNotes){const t=this.Reveal.getSlideNotes(i);if(t){const i=8,s="string"==typeof e.showNotes?e.showNotes:"inline",a=document.createElement("div");a.classList.add("speaker-notes"),a.classList.add("speaker-notes-pdf"),a.setAttribute("data-layout",s),a.innerHTML=t,"separate-page"===s?g.push(a):(a.style.left=i+"px",a.style.bottom=i+"px",a.style.width=n-2*i+"px",f.appendChild(a))}}if(s){const e=document.createElement("div");e.classList.add("slide-number"),e.classList.add("slide-number-pdf"),e.innerHTML=v++,f.appendChild(e)}if(e.pdfSeparateFragments){const e=this.Reveal.fragments.sort(f.querySelectorAll(".fragment"),!0);let t;e.forEach((function(e,i){t&&t.forEach((function(e){e.classList.remove("current-fragment")})),e.forEach((function(e){e.classList.add("visible","current-fragment")}),this);const a=f.cloneNode(!0);if(s){const e=i+1;a.querySelector(".slide-number-pdf").innerHTML+="."+e}g.push(a),t=e}),this),e.forEach((function(e){e.forEach((function(e){e.classList.remove("visible","current-fragment")}))}))}else t(f,".fragment:not(.fade-out)").forEach((function(e){e.classList.add("visible")}))}}),this),await new Promise(requestAnimationFrame),g.forEach((e=>p.appendChild(e))),this.Reveal.slideContent.layout(this.Reveal.getSlidesElement()),this.Reveal.dispatchEvent({type:"pdf-ready"}),c.classList.remove("loading-scroll-mode")}isActive(){return"print"===this.Reveal.getConfig().view}}class 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this.sort(e.querySelectorAll(".fragment"))}goto(e,t=0){let i=this.Reveal.getCurrentSlide();if(i&&this.Reveal.getConfig().fragments){let s=this.sort(i.querySelectorAll(".fragment:not(.disabled)"));if(s.length){if("number"!=typeof e){let t=this.sort(i.querySelectorAll(".fragment:not(.disabled).visible")).pop();e=t?parseInt(t.getAttribute("data-fragment-index")||0,10):-1}e+=t;let a=this.update(e,s);return this.Reveal.controls.update(),this.Reveal.progress.update(),this.Reveal.getConfig().fragmentInURL&&this.Reveal.location.writeURL(),!(!a.shown.length&&!a.hidden.length)}}return!1}next(){return this.goto(null,1)}prev(){return this.goto(null,-1)}}class T{constructor(e){this.Reveal=e,this.active=!1,this.onSlideClicked=this.onSlideClicked.bind(this)}activate(){if(this.Reveal.getConfig().overview&&!this.Reveal.isScrollView()&&!this.isActive()){this.active=!0,this.Reveal.getRevealElement().classList.add("overview"),this.Reveal.cancelAutoSlide(),this.Reveal.getSlidesElement().appendChild(this.Reveal.getBackgroundsElement()),t(this.Reveal.getRevealElement(),m).forEach((e=>{e.classList.contains("stack")||e.addEventListener("click",this.onSlideClicked,!0)}));const e=70,i=this.Reveal.getComputedSlideSize();this.overviewSlideWidth=i.width+e,this.overviewSlideHeight=i.height+e,this.Reveal.getConfig().rtl&&(this.overviewSlideWidth=-this.overviewSlideWidth),this.Reveal.updateSlidesVisibility(),this.layout(),this.update(),this.Reveal.layout();const 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a=this.Reveal.getIndices(e);if(this.Reveal.getConfig().fragmentInURL||(a.f=void 0),"string"==typeof s&&s.length)t="/"+s,a.f>=0&&(t+="/"+a.f);else{let e=this.Reveal.getConfig().hashOneBasedIndex?1:0;(a.h>0||a.v>0||a.f>=0)&&(t+=a.h+e),(a.v>0||a.f>=0)&&(t+="/"+(a.v+e)),a.f>=0&&(t+="/"+a.f)}return t}onWindowHashChange(e){this.readURL()}}class I{constructor(e){this.Reveal=e,this.onNavigateLeftClicked=this.onNavigateLeftClicked.bind(this),this.onNavigateRightClicked=this.onNavigateRightClicked.bind(this),this.onNavigateUpClicked=this.onNavigateUpClicked.bind(this),this.onNavigateDownClicked=this.onNavigateDownClicked.bind(this),this.onNavigatePrevClicked=this.onNavigatePrevClicked.bind(this),this.onNavigateNextClicked=this.onNavigateNextClicked.bind(this),this.onEnterFullscreen=this.onEnterFullscreen.bind(this)}render(){const e=this.Reveal.getConfig().rtl,i=this.Reveal.getRevealElement();this.element=document.createElement("aside"),this.element.className="controls",this.element.innerHTML=`<button class="navigate-left" aria-label="${e?"next slide":"previous slide"}"><div class="controls-arrow"></div></button>\n\t\t\t<button class="navigate-right" aria-label="${e?"previous slide":"next slide"}"><div class="controls-arrow"></div></button>\n\t\t\t<button class="navigate-up" aria-label="above slide"><div class="controls-arrow"></div></button>\n\t\t\t<button class="navigate-down" aria-label="below slide"><div 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e=["touchstart","click"];g&&(e=["touchstart"]),e.forEach((e=>{this.controlsLeft.forEach((t=>t.addEventListener(e,this.onNavigateLeftClicked,!1))),this.controlsRight.forEach((t=>t.addEventListener(e,this.onNavigateRightClicked,!1))),this.controlsUp.forEach((t=>t.addEventListener(e,this.onNavigateUpClicked,!1))),this.controlsDown.forEach((t=>t.addEventListener(e,this.onNavigateDownClicked,!1))),this.controlsPrev.forEach((t=>t.addEventListener(e,this.onNavigatePrevClicked,!1))),this.controlsNext.forEach((t=>t.addEventListener(e,this.onNavigateNextClicked,!1))),this.controlsFullscreen.forEach((t=>t.addEventListener(e,this.onEnterFullscreen,!1)))}))}unbind(){["touchstart","click"].forEach((e=>{this.controlsLeft.forEach((t=>t.removeEventListener(e,this.onNavigateLeftClicked,!1))),this.controlsRight.forEach((t=>t.removeEventListener(e,this.onNavigateRightClicked,!1))),this.controlsUp.forEach((t=>t.removeEventListener(e,this.onNavigateUpClicked,!1))),this.controlsDown.forEach((t=>t.removeEventListener(e,this.onNavigateDownClicked,!1))),this.controlsPrev.forEach((t=>t.removeEventListener(e,this.onNavigatePrevClicked,!1))),this.controlsNext.forEach((t=>t.removeEventListener(e,this.onNavigateNextClicked,!1))),this.controlsFullscreen.forEach((t=>t.removeEventListener(e,this.onEnterFullscreen,!1)))}))}update(){let e=this.Reveal.availableRoutes();[...this.controlsLeft,...this.controlsRight,...this.controlsUp,...this.controlsDown,...this.controlsPrev,...this.controlsNext].forEach((e=>{e.classList.remove("enabled","fragmented"),e.setAttribute("disabled","disabled")})),e.left&&this.controlsLeft.forEach((e=>{e.classList.add("enabled"),e.removeAttribute("disabled")})),e.right&&this.controlsRight.forEach((e=>{e.classList.add("enabled"),e.removeAttribute("disabled")})),e.up&&this.controlsUp.forEach((e=>{e.classList.add("enabled"),e.removeAttribute("disabled")})),e.down&&this.controlsDown.forEach((e=>{e.classList.add("enabled"),e.removeAttribute("disabled")})),(e.left||e.up)&&this.controlsPrev.forEach((e=>{e.classList.add("enabled"),e.removeAttribute("disabled")})),(e.right||e.down)&&this.controlsNext.forEach((e=>{e.classList.add("enabled"),e.removeAttribute("disabled")}));let t=this.Reveal.getCurrentSlide();if(t){let e=this.Reveal.fragments.availableRoutes();e.prev&&this.controlsPrev.forEach((e=>{e.classList.add("fragmented","enabled"),e.removeAttribute("disabled")})),e.next&&this.controlsNext.forEach((e=>{e.classList.add("fragmented","enabled"),e.removeAttribute("disabled")})),this.Reveal.isVerticalSlide(t)?(e.prev&&this.controlsUp.forEach((e=>{e.classList.add("fragmented","enabled"),e.removeAttribute("disabled")})),e.next&&this.controlsDown.forEach((e=>{e.classList.add("fragmented","enabled"),e.removeAttribute("disabled")}))):(e.prev&&this.controlsLeft.forEach((e=>{e.classList.add("fragmented","enabled"),e.removeAttribute("disabled")})),e.next&&this.controlsRight.forEach((e=>{e.classList.add("fragmented","enabled"),e.removeAttribute("disabled")})))}if(this.Reveal.getConfig().controlsTutorial){let 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diff --git a/_freeze/site_libs/revealjs/dist/reveal.esm.js.map b/_freeze/site_libs/revealjs/dist/reveal.esm.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"reveal.esm.js","sources":["../js/utils/util.js","../js/utils/device.js","../node_modules/fitty/dist/fitty.module.js","../js/controllers/slidecontent.js","../js/utils/constants.js","../js/controllers/slidenumber.js","../js/controllers/jumptoslide.js","../js/utils/color.js","../js/controllers/backgrounds.js","../js/controllers/autoanimate.js","../js/controllers/scrollview.js","../js/controllers/printview.js","../js/controllers/fragments.js","../js/controllers/overview.js","../js/controllers/keyboard.js","../js/controllers/location.js","../js/controllers/controls.js","../js/controllers/progress.js","../js/controllers/pointer.js","../js/utils/loader.js","../js/controllers/plugins.js","../js/controllers/touch.js","../js/controllers/focus.js","../js/controllers/notes.js","../js/components/playback.js","../js/config.js","../js/reveal.js","../js/index.js"],"sourcesContent":["/**\n * Extend object a with the properties of object b.\n * If there's a conflict, object b takes precedence.\n *\n * @param {object} a\n * @param {object} b\n */\nexport const extend = ( a, b ) => {\n\n\tfor( let i in b ) {\n\t\ta[ i ] = b[ i ];\n\t}\n\n\treturn a;\n\n}\n\n/**\n * querySelectorAll but returns an Array.\n */\nexport const queryAll = ( el, selector ) => {\n\n\treturn Array.from( el.querySelectorAll( selector ) );\n\n}\n\n/**\n * classList.toggle() with cross browser support\n */\nexport const toggleClass = ( el, className, value ) => {\n\tif( value ) {\n\t\tel.classList.add( className );\n\t}\n\telse {\n\t\tel.classList.remove( className );\n\t}\n}\n\n/**\n * Utility for deserializing a value.\n *\n * @param {*} value\n * @return {*}\n */\nexport const deserialize = ( value ) => {\n\n\tif( typeof value === 'string' ) {\n\t\tif( value === 'null' ) return null;\n\t\telse if( value === 'true' ) return true;\n\t\telse if( value === 'false' ) return false;\n\t\telse if( value.match( /^-?[\\d\\.]+$/ ) ) return parseFloat( value );\n\t}\n\n\treturn value;\n\n}\n\n/**\n * Measures the distance in pixels between point a\n * and point b.\n *\n * @param {object} a point with x/y properties\n * @param {object} b point with x/y properties\n *\n * @return {number}\n */\nexport const distanceBetween = ( a, b ) => {\n\n\tlet dx = a.x - b.x,\n\t\tdy = a.y - b.y;\n\n\treturn Math.sqrt( dx*dx + dy*dy );\n\n}\n\n/**\n * Applies a CSS transform to the target element.\n *\n * @param {HTMLElement} element\n * @param {string} transform\n */\nexport const transformElement = ( element, transform ) => {\n\n\telement.style.transform = transform;\n\n}\n\n/**\n * Element.matches with IE support.\n *\n * @param {HTMLElement} target The element to match\n * @param {String} selector The CSS selector to match\n * the element against\n *\n * @return {Boolean}\n */\nexport const matches = ( target, selector ) => {\n\n\tlet matchesMethod = target.matches || target.matchesSelector || target.msMatchesSelector;\n\n\treturn !!( matchesMethod && matchesMethod.call( target, selector ) );\n\n}\n\n/**\n * Find the closest parent that matches the given\n * selector.\n *\n * @param {HTMLElement} target The child element\n * @param {String} selector The CSS selector to match\n * the parents against\n *\n * @return {HTMLElement} The matched parent or null\n * if no matching parent was found\n */\nexport const closest = ( target, selector ) => {\n\n\t// Native Element.closest\n\tif( typeof target.closest === 'function' ) {\n\t\treturn target.closest( selector );\n\t}\n\n\t// Polyfill\n\twhile( target ) {\n\t\tif( matches( target, selector ) ) {\n\t\t\treturn target;\n\t\t}\n\n\t\t// Keep searching\n\t\ttarget = target.parentNode;\n\t}\n\n\treturn null;\n\n}\n\n/**\n * Handling the fullscreen functionality via the fullscreen API\n *\n * @see http://fullscreen.spec.whatwg.org/\n * @see https://developer.mozilla.org/en-US/docs/DOM/Using_fullscreen_mode\n */\nexport const enterFullscreen = element => {\n\n\telement = element || document.documentElement;\n\n\t// Check which implementation is available\n\tlet requestMethod = element.requestFullscreen ||\n\t\t\t\t\t\telement.webkitRequestFullscreen ||\n\t\t\t\t\t\telement.webkitRequestFullScreen ||\n\t\t\t\t\t\telement.mozRequestFullScreen ||\n\t\t\t\t\t\telement.msRequestFullscreen;\n\n\tif( requestMethod ) {\n\t\trequestMethod.apply( element );\n\t}\n\n}\n\n/**\n * Creates an HTML element and returns a reference to it.\n * If the element already exists the existing instance will\n * be returned.\n *\n * @param {HTMLElement} container\n * @param {string} tagname\n * @param {string} classname\n * @param {string} innerHTML\n *\n * @return {HTMLElement}\n */\nexport const createSingletonNode = ( container, tagname, classname, innerHTML='' ) => {\n\n\t// Find all nodes matching the description\n\tlet nodes = container.querySelectorAll( '.' + classname );\n\n\t// Check all matches to find one which is a direct child of\n\t// the specified container\n\tfor( let i = 0; i < nodes.length; i++ ) {\n\t\tlet testNode = nodes[i];\n\t\tif( testNode.parentNode === container ) {\n\t\t\treturn testNode;\n\t\t}\n\t}\n\n\t// If no node was found, create it now\n\tlet node = document.createElement( tagname );\n\tnode.className = classname;\n\tnode.innerHTML = innerHTML;\n\tcontainer.appendChild( node );\n\n\treturn node;\n\n}\n\n/**\n * Injects the given CSS styles into the DOM.\n *\n * @param {string} value\n */\nexport const createStyleSheet = ( value ) => {\n\n\tlet tag = document.createElement( 'style' );\n\ttag.type = 'text/css';\n\n\tif( value && value.length > 0 ) {\n\t\tif( tag.styleSheet ) {\n\t\t\ttag.styleSheet.cssText = value;\n\t\t}\n\t\telse {\n\t\t\ttag.appendChild( document.createTextNode( value ) );\n\t\t}\n\t}\n\n\tdocument.head.appendChild( tag );\n\n\treturn tag;\n\n}\n\n/**\n * Returns a key:value hash of all query params.\n */\nexport const getQueryHash = () => {\n\n\tlet query = {};\n\n\tlocation.search.replace( /[A-Z0-9]+?=([\\w\\.%-]*)/gi, a => {\n\t\tquery[ a.split( '=' ).shift() ] = a.split( '=' ).pop();\n\t} );\n\n\t// Basic deserialization\n\tfor( let i in query ) {\n\t\tlet value = query[ i ];\n\n\t\tquery[ i ] = deserialize( unescape( value ) );\n\t}\n\n\t// Do not accept new dependencies via query config to avoid\n\t// the potential of malicious script injection\n\tif( typeof query['dependencies'] !== 'undefined' ) delete query['dependencies'];\n\n\treturn query;\n\n}\n\n/**\n * Returns the remaining height within the parent of the\n * target element.\n *\n * remaining height = [ configured parent height ] - [ current parent height ]\n *\n * @param {HTMLElement} element\n * @param {number} [height]\n */\nexport const getRemainingHeight = ( element, height = 0 ) => {\n\n\tif( element ) {\n\t\tlet newHeight, oldHeight = element.style.height;\n\n\t\t// Change the .stretch element height to 0 in order find the height of all\n\t\t// the other elements\n\t\telement.style.height = '0px';\n\n\t\t// In Overview mode, the parent (.slide) height is set of 700px.\n\t\t// Restore it temporarily to its natural height.\n\t\telement.parentNode.style.height = 'auto';\n\n\t\tnewHeight = height - element.parentNode.offsetHeight;\n\n\t\t// Restore the old height, just in case\n\t\telement.style.height = oldHeight + 'px';\n\n\t\t// Clear the parent (.slide) height. .removeProperty works in IE9+\n\t\telement.parentNode.style.removeProperty('height');\n\n\t\treturn newHeight;\n\t}\n\n\treturn height;\n\n}\n\nconst fileExtensionToMimeMap = {\n\t'mp4': 'video/mp4',\n\t'm4a': 'video/mp4',\n\t'ogv': 'video/ogg',\n\t'mpeg': 'video/mpeg',\n\t'webm': 'video/webm'\n}\n\n/**\n * Guess the MIME type for common file formats.\n */\nexport const getMimeTypeFromFile = ( filename='' ) => {\n\treturn fileExtensionToMimeMap[filename.split('.').pop()]\n}\n\n/**\n * Encodes a string for RFC3986-compliant URL format.\n * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURI#encoding_for_rfc3986\n *\n * @param {string} url\n */\nexport const encodeRFC3986URI = ( url='' ) => {\n\treturn encodeURI(url)\n\t .replace(/%5B/g, \"[\")\n\t .replace(/%5D/g, \"]\")\n\t .replace(\n\t\t/[!'()*]/g,\n\t\t(c) => `%${c.charCodeAt(0).toString(16).toUpperCase()}`\n\t );\n}","const UA = navigator.userAgent;\n\nexport const isMobile = /(iphone|ipod|ipad|android)/gi.test( UA ) ||\n\t\t\t\t\t\t( navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1 ); // iPadOS\n\nexport const isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );\n\nexport const isAndroid = /android/gi.test( UA );","/**\n * fitty v2.3.7 - Snugly resizes text to fit its parent container\n * Copyright (c) 2023 Rik Schennink <rik@pqina.nl> (https://pqina.nl/)\n */\n\nvar e=function(e){if(e){var t=function(e){return[].slice.call(e)},n=0,i=1,r=2,o=3,a=[],l=null,u=\"requestAnimationFrame\"in e?function(){e.cancelAnimationFrame(l),l=e.requestAnimationFrame((function(){return s(a.filter((function(e){return e.dirty&&e.active})))}))}:function(){},c=function(e){return function(){a.forEach((function(t){return t.dirty=e})),u()}},s=function(e){e.filter((function(e){return!e.styleComputed})).forEach((function(e){e.styleComputed=m(e)})),e.filter(y).forEach(v);var t=e.filter(p);t.forEach(d),t.forEach((function(e){v(e),f(e)})),t.forEach(S)},f=function(e){return e.dirty=n},d=function(e){e.availableWidth=e.element.parentNode.clientWidth,e.currentWidth=e.element.scrollWidth,e.previousFontSize=e.currentFontSize,e.currentFontSize=Math.min(Math.max(e.minSize,e.availableWidth/e.currentWidth*e.previousFontSize),e.maxSize),e.whiteSpace=e.multiLine&&e.currentFontSize===e.minSize?\"normal\":\"nowrap\"},p=function(e){return e.dirty!==r||e.dirty===r&&e.element.parentNode.clientWidth!==e.availableWidth},m=function(t){var n=e.getComputedStyle(t.element,null);return t.currentFontSize=parseFloat(n.getPropertyValue(\"font-size\")),t.display=n.getPropertyValue(\"display\"),t.whiteSpace=n.getPropertyValue(\"white-space\"),!0},y=function(e){var t=!1;return!e.preStyleTestCompleted&&(/inline-/.test(e.display)||(t=!0,e.display=\"inline-block\"),\"nowrap\"!==e.whiteSpace&&(t=!0,e.whiteSpace=\"nowrap\"),e.preStyleTestCompleted=!0,t)},v=function(e){e.element.style.whiteSpace=e.whiteSpace,e.element.style.display=e.display,e.element.style.fontSize=e.currentFontSize+\"px\"},S=function(e){e.element.dispatchEvent(new CustomEvent(\"fit\",{detail:{oldValue:e.previousFontSize,newValue:e.currentFontSize,scaleFactor:e.currentFontSize/e.previousFontSize}}))},h=function(e,t){return function(){e.dirty=t,e.active&&u()}},w=function(e){return function(){a=a.filter((function(t){return t.element!==e.element})),e.observeMutations&&e.observer.disconnect(),e.element.style.whiteSpace=e.originalStyle.whiteSpace,e.element.style.display=e.originalStyle.display,e.element.style.fontSize=e.originalStyle.fontSize}},b=function(e){return function(){e.active||(e.active=!0,u())}},z=function(e){return function(){return e.active=!1}},F=function(e){e.observeMutations&&(e.observer=new MutationObserver(h(e,i)),e.observer.observe(e.element,e.observeMutations))},g={minSize:16,maxSize:512,multiLine:!0,observeMutations:\"MutationObserver\"in e&&{subtree:!0,childList:!0,characterData:!0}},W=null,E=function(){e.clearTimeout(W),W=e.setTimeout(c(r),x.observeWindowDelay)},M=[\"resize\",\"orientationchange\"];return Object.defineProperty(x,\"observeWindow\",{set:function(t){var n=\"\".concat(t?\"add\":\"remove\",\"EventListener\");M.forEach((function(t){e[n](t,E)}))}}),x.observeWindow=!0,x.observeWindowDelay=100,x.fitAll=c(o),x}function C(e,t){var n=Object.assign({},g,t),i=e.map((function(e){var t=Object.assign({},n,{element:e,active:!0});return function(e){e.originalStyle={whiteSpace:e.element.style.whiteSpace,display:e.element.style.display,fontSize:e.element.style.fontSize},F(e),e.newbie=!0,e.dirty=!0,a.push(e)}(t),{element:e,fit:h(t,o),unfreeze:b(t),freeze:z(t),unsubscribe:w(t)}}));return u(),i}function x(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};return\"string\"==typeof e?C(t(document.querySelectorAll(e)),n):C([e],n)[0]}}(\"undefined\"==typeof window?null:window);export default e;\n","import { extend, queryAll, closest, getMimeTypeFromFile, encodeRFC3986URI } from '../utils/util.js'\nimport { isMobile } from '../utils/device.js'\n\nimport fitty from 'fitty';\n\n/**\n * Handles loading, unloading and playback of slide\n * content such as images, videos and iframes.\n */\nexport default class SlideContent {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.startEmbeddedIframe = this.startEmbeddedIframe.bind( this );\n\n\t}\n\n\t/**\n\t * Should the given element be preloaded?\n\t * Decides based on local element attributes and global config.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tshouldPreload( element ) {\n\n\t\tif( this.Reveal.isScrollView() ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Prefer an explicit global preload setting\n\t\tlet preload = this.Reveal.getConfig().preloadIframes;\n\n\t\t// If no global setting is available, fall back on the element's\n\t\t// own preload setting\n\t\tif( typeof preload !== 'boolean' ) {\n\t\t\tpreload = element.hasAttribute( 'data-preload' );\n\t\t}\n\n\t\treturn preload;\n\t}\n\n\t/**\n\t * Called when the given slide is within the configured view\n\t * distance. Shows the slide element and loads any content\n\t * that is set to load lazily (data-src).\n\t *\n\t * @param {HTMLElement} slide Slide to show\n\t */\n\tload( slide, options = {} ) {\n\n\t\t// Show the slide element\n\t\tslide.style.display = this.Reveal.getConfig().display;\n\n\t\t// Media elements with data-src attributes\n\t\tqueryAll( slide, 'img[data-src], video[data-src], audio[data-src], iframe[data-src]' ).forEach( element => {\n\t\t\tif( element.tagName !== 'IFRAME' || this.shouldPreload( element ) ) {\n\t\t\t\telement.setAttribute( 'src', element.getAttribute( 'data-src' ) );\n\t\t\t\telement.setAttribute( 'data-lazy-loaded', '' );\n\t\t\t\telement.removeAttribute( 'data-src' );\n\t\t\t}\n\t\t} );\n\n\t\t// Media elements with <source> children\n\t\tqueryAll( slide, 'video, audio' ).forEach( media => {\n\t\t\tlet sources = 0;\n\n\t\t\tqueryAll( media, 'source[data-src]' ).forEach( source => {\n\t\t\t\tsource.setAttribute( 'src', source.getAttribute( 'data-src' ) );\n\t\t\t\tsource.removeAttribute( 'data-src' );\n\t\t\t\tsource.setAttribute( 'data-lazy-loaded', '' );\n\t\t\t\tsources += 1;\n\t\t\t} );\n\n\t\t\t// Enable inline video playback in mobile Safari\n\t\t\tif( isMobile && media.tagName === 'VIDEO' ) {\n\t\t\t\tmedia.setAttribute( 'playsinline', '' );\n\t\t\t}\n\n\t\t\t// If we rewrote sources for this video/audio element, we need\n\t\t\t// to manually tell it to load from its new origin\n\t\t\tif( sources > 0 ) {\n\t\t\t\tmedia.load();\n\t\t\t}\n\t\t} );\n\n\n\t\t// Show the corresponding background element\n\t\tlet background = slide.slideBackgroundElement;\n\t\tif( background ) {\n\t\t\tbackground.style.display = 'block';\n\n\t\t\tlet backgroundContent = slide.slideBackgroundContentElement;\n\t\t\tlet backgroundIframe = slide.getAttribute( 'data-background-iframe' );\n\n\t\t\t// If the background contains media, load it\n\t\t\tif( background.hasAttribute( 'data-loaded' ) === false ) {\n\t\t\t\tbackground.setAttribute( 'data-loaded', 'true' );\n\n\t\t\t\tlet backgroundImage = slide.getAttribute( 'data-background-image' ),\n\t\t\t\t\tbackgroundVideo = slide.getAttribute( 'data-background-video' ),\n\t\t\t\t\tbackgroundVideoLoop = slide.hasAttribute( 'data-background-video-loop' ),\n\t\t\t\t\tbackgroundVideoMuted = slide.hasAttribute( 'data-background-video-muted' );\n\n\t\t\t\t// Images\n\t\t\t\tif( backgroundImage ) {\n\t\t\t\t\t// base64\n\t\t\t\t\tif( /^data:/.test( backgroundImage.trim() ) ) {\n\t\t\t\t\t\tbackgroundContent.style.backgroundImage = `url(${backgroundImage.trim()})`;\n\t\t\t\t\t}\n\t\t\t\t\t// URL(s)\n\t\t\t\t\telse {\n\t\t\t\t\t\tbackgroundContent.style.backgroundImage = backgroundImage.split( ',' ).map( background => {\n\t\t\t\t\t\t\t// Decode URL(s) that are already encoded first\n\t\t\t\t\t\t\tlet decoded = decodeURI(background.trim());\n\t\t\t\t\t\t\treturn `url(${encodeRFC3986URI(decoded)})`;\n\t\t\t\t\t\t}).join( ',' );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t// Videos\n\t\t\t\telse if ( backgroundVideo && !this.Reveal.isSpeakerNotes() ) {\n\t\t\t\t\tlet video = document.createElement( 'video' );\n\n\t\t\t\t\tif( backgroundVideoLoop ) {\n\t\t\t\t\t\tvideo.setAttribute( 'loop', '' );\n\t\t\t\t\t}\n\n\t\t\t\t\tif( backgroundVideoMuted ) {\n\t\t\t\t\t\tvideo.muted = true;\n\t\t\t\t\t}\n\n\t\t\t\t\t// Enable inline playback in mobile Safari\n\t\t\t\t\t//\n\t\t\t\t\t// Mute is required for video to play when using\n\t\t\t\t\t// swipe gestures to navigate since they don't\n\t\t\t\t\t// count as direct user actions :'(\n\t\t\t\t\tif( isMobile ) {\n\t\t\t\t\t\tvideo.muted = true;\n\t\t\t\t\t\tvideo.setAttribute( 'playsinline', '' );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Support comma separated lists of video sources\n\t\t\t\t\tbackgroundVideo.split( ',' ).forEach( source => {\n\t\t\t\t\t\tconst sourceElement = document.createElement( 'source' );\n\t\t\t\t\t\tsourceElement.setAttribute( 'src', source );\n\n\t\t\t\t\t\tlet type = getMimeTypeFromFile( source );\n\t\t\t\t\t\tif( type ) {\n\t\t\t\t\t\t\tsourceElement.setAttribute( 'type', type );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tvideo.appendChild( sourceElement );\n\t\t\t\t\t} );\n\n\t\t\t\t\tbackgroundContent.appendChild( video );\n\t\t\t\t}\n\t\t\t\t// Iframes\n\t\t\t\telse if( backgroundIframe && options.excludeIframes !== true ) {\n\t\t\t\t\tlet iframe = document.createElement( 'iframe' );\n\t\t\t\t\tiframe.setAttribute( 'allowfullscreen', '' );\n\t\t\t\t\tiframe.setAttribute( 'mozallowfullscreen', '' );\n\t\t\t\t\tiframe.setAttribute( 'webkitallowfullscreen', '' );\n\t\t\t\t\tiframe.setAttribute( 'allow', 'autoplay' );\n\n\t\t\t\t\tiframe.setAttribute( 'data-src', backgroundIframe );\n\n\t\t\t\t\tiframe.style.width = '100%';\n\t\t\t\t\tiframe.style.height = '100%';\n\t\t\t\t\tiframe.style.maxHeight = '100%';\n\t\t\t\t\tiframe.style.maxWidth = '100%';\n\n\t\t\t\t\tbackgroundContent.appendChild( iframe );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Start loading preloadable iframes\n\t\t\tlet backgroundIframeElement = backgroundContent.querySelector( 'iframe[data-src]' );\n\t\t\tif( backgroundIframeElement ) {\n\n\t\t\t\t// Check if this iframe is eligible to be preloaded\n\t\t\t\tif( this.shouldPreload( background ) && !/autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) {\n\t\t\t\t\tif( backgroundIframeElement.getAttribute( 'src' ) !== backgroundIframe ) {\n\t\t\t\t\t\tbackgroundIframeElement.setAttribute( 'src', backgroundIframe );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis.layout( slide );\n\n\t}\n\n\t/**\n\t * Applies JS-dependent layout helpers for the scope.\n\t */\n\tlayout( scopeElement ) {\n\n\t\t// Autosize text with the r-fit-text class based on the\n\t\t// size of its container. This needs to happen after the\n\t\t// slide is visible in order to measure the text.\n\t\tArray.from( scopeElement.querySelectorAll( '.r-fit-text' ) ).forEach( element => {\n\t\t\tfitty( element, {\n\t\t\t\tminSize: 24,\n\t\t\t\tmaxSize: this.Reveal.getConfig().height * 0.8,\n\t\t\t\tobserveMutations: false,\n\t\t\t\tobserveWindow: false\n\t\t\t} );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Unloads and hides the given slide. This is called when the\n\t * slide is moved outside of the configured view distance.\n\t *\n\t * @param {HTMLElement} slide\n\t */\n\tunload( slide ) {\n\n\t\t// Hide the slide element\n\t\tslide.style.display = 'none';\n\n\t\t// Hide the corresponding background element\n\t\tlet background = this.Reveal.getSlideBackground( slide );\n\t\tif( background ) {\n\t\t\tbackground.style.display = 'none';\n\n\t\t\t// Unload any background iframes\n\t\t\tqueryAll( background, 'iframe[src]' ).forEach( element => {\n\t\t\t\telement.removeAttribute( 'src' );\n\t\t\t} );\n\t\t}\n\n\t\t// Reset lazy-loaded media elements with src attributes\n\t\tqueryAll( slide, 'video[data-lazy-loaded][src], audio[data-lazy-loaded][src], iframe[data-lazy-loaded][src]' ).forEach( element => {\n\t\t\telement.setAttribute( 'data-src', element.getAttribute( 'src' ) );\n\t\t\telement.removeAttribute( 'src' );\n\t\t} );\n\n\t\t// Reset lazy-loaded media elements with <source> children\n\t\tqueryAll( slide, 'video[data-lazy-loaded] source[src], audio source[src]' ).forEach( source => {\n\t\t\tsource.setAttribute( 'data-src', source.getAttribute( 'src' ) );\n\t\t\tsource.removeAttribute( 'src' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Enforces origin-specific format rules for embedded media.\n\t */\n\tformatEmbeddedContent() {\n\n\t\tlet _appendParamToIframeSource = ( sourceAttribute, sourceURL, param ) => {\n\t\t\tqueryAll( this.Reveal.getSlidesElement(), 'iframe['+ sourceAttribute +'*=\"'+ sourceURL +'\"]' ).forEach( el => {\n\t\t\t\tlet src = el.getAttribute( sourceAttribute );\n\t\t\t\tif( src && src.indexOf( param ) === -1 ) {\n\t\t\t\t\tel.setAttribute( sourceAttribute, src + ( !/\\?/.test( src ) ? '?' : '&' ) + param );\n\t\t\t\t}\n\t\t\t});\n\t\t};\n\n\t\t// YouTube frames must include \"?enablejsapi=1\"\n\t\t_appendParamToIframeSource( 'src', 'youtube.com/embed/', 'enablejsapi=1' );\n\t\t_appendParamToIframeSource( 'data-src', 'youtube.com/embed/', 'enablejsapi=1' );\n\n\t\t// Vimeo frames must include \"?api=1\"\n\t\t_appendParamToIframeSource( 'src', 'player.vimeo.com/', 'api=1' );\n\t\t_appendParamToIframeSource( 'data-src', 'player.vimeo.com/', 'api=1' );\n\n\t}\n\n\t/**\n\t * Start playback of any embedded content inside of\n\t * the given element.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tstartEmbeddedContent( element ) {\n\n\t\tif( element && !this.Reveal.isSpeakerNotes() ) {\n\n\t\t\t// Restart GIFs\n\t\t\tqueryAll( element, 'img[src$=\".gif\"]' ).forEach( el => {\n\t\t\t\t// Setting the same unchanged source like this was confirmed\n\t\t\t\t// to work in Chrome, FF & Safari\n\t\t\t\tel.setAttribute( 'src', el.getAttribute( 'src' ) );\n\t\t\t} );\n\n\t\t\t// HTML5 media elements\n\t\t\tqueryAll( element, 'video, audio' ).forEach( el => {\n\t\t\t\tif( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\t// Prefer an explicit global autoplay setting\n\t\t\t\tlet autoplay = this.Reveal.getConfig().autoPlayMedia;\n\n\t\t\t\t// If no global setting is available, fall back on the element's\n\t\t\t\t// own autoplay setting\n\t\t\t\tif( typeof autoplay !== 'boolean' ) {\n\t\t\t\t\tautoplay = el.hasAttribute( 'data-autoplay' ) || !!closest( el, '.slide-background' );\n\t\t\t\t}\n\n\t\t\t\tif( autoplay && typeof el.play === 'function' ) {\n\n\t\t\t\t\t// If the media is ready, start playback\n\t\t\t\t\tif( el.readyState > 1 ) {\n\t\t\t\t\t\tthis.startEmbeddedMedia( { target: el } );\n\t\t\t\t\t}\n\t\t\t\t\t// Mobile devices never fire a loaded event so instead\n\t\t\t\t\t// of waiting, we initiate playback\n\t\t\t\t\telse if( isMobile ) {\n\t\t\t\t\t\tlet promise = el.play();\n\n\t\t\t\t\t\t// If autoplay does not work, ensure that the controls are visible so\n\t\t\t\t\t\t// that the viewer can start the media on their own\n\t\t\t\t\t\tif( promise && typeof promise.catch === 'function' && el.controls === false ) {\n\t\t\t\t\t\t\tpromise.catch( () => {\n\t\t\t\t\t\t\t\tel.controls = true;\n\n\t\t\t\t\t\t\t\t// Once the video does start playing, hide the controls again\n\t\t\t\t\t\t\t\tel.addEventListener( 'play', () => {\n\t\t\t\t\t\t\t\t\tel.controls = false;\n\t\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\t// If the media isn't loaded, wait before playing\n\t\t\t\t\telse {\n\t\t\t\t\t\tel.removeEventListener( 'loadeddata', this.startEmbeddedMedia ); // remove first to avoid dupes\n\t\t\t\t\t\tel.addEventListener( 'loadeddata', this.startEmbeddedMedia );\n\t\t\t\t\t}\n\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\t// Normal iframes\n\t\t\tqueryAll( element, 'iframe[src]' ).forEach( el => {\n\t\t\t\tif( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tthis.startEmbeddedIframe( { target: el } );\n\t\t\t} );\n\n\t\t\t// Lazy loading iframes\n\t\t\tqueryAll( element, 'iframe[data-src]' ).forEach( el => {\n\t\t\t\tif( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tif( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {\n\t\t\t\t\tel.removeEventListener( 'load', this.startEmbeddedIframe ); // remove first to avoid dupes\n\t\t\t\t\tel.addEventListener( 'load', this.startEmbeddedIframe );\n\t\t\t\t\tel.setAttribute( 'src', el.getAttribute( 'data-src' ) );\n\t\t\t\t}\n\t\t\t} );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Starts playing an embedded video/audio element after\n\t * it has finished loading.\n\t *\n\t * @param {object} event\n\t */\n\tstartEmbeddedMedia( event ) {\n\n\t\tlet isAttachedToDOM = !!closest( event.target, 'html' ),\n\t\t\tisVisible \t\t= !!closest( event.target, '.present' );\n\n\t\tif( isAttachedToDOM && isVisible ) {\n\t\t\t// Don't restart if media is already playing\n\t\t\tif( event.target.paused || event.target.ended ) {\n\t\t\t\tevent.target.currentTime = 0;\n\t\t\t\tevent.target.play();\n\t\t\t}\n\t\t}\n\n\t\tevent.target.removeEventListener( 'loadeddata', this.startEmbeddedMedia );\n\n\t}\n\n\t/**\n\t * \"Starts\" the content of an embedded iframe using the\n\t * postMessage API.\n\t *\n\t * @param {object} event\n\t */\n\tstartEmbeddedIframe( event ) {\n\n\t\tlet iframe = event.target;\n\n\t\tif( iframe && iframe.contentWindow ) {\n\n\t\t\tlet isAttachedToDOM = !!closest( event.target, 'html' ),\n\t\t\t\tisVisible \t\t= !!closest( event.target, '.present' );\n\n\t\t\tif( isAttachedToDOM && isVisible ) {\n\n\t\t\t\t// Prefer an explicit global autoplay setting\n\t\t\t\tlet autoplay = this.Reveal.getConfig().autoPlayMedia;\n\n\t\t\t\t// If no global setting is available, fall back on the element's\n\t\t\t\t// own autoplay setting\n\t\t\t\tif( typeof autoplay !== 'boolean' ) {\n\t\t\t\t\tautoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closest( iframe, '.slide-background' );\n\t\t\t\t}\n\n\t\t\t\t// YouTube postMessage API\n\t\t\t\tif( /youtube\\.com\\/embed\\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {\n\t\t\t\t\tiframe.contentWindow.postMessage( '{\"event\":\"command\",\"func\":\"playVideo\",\"args\":\"\"}', '*' );\n\t\t\t\t}\n\t\t\t\t// Vimeo postMessage API\n\t\t\t\telse if( /player\\.vimeo\\.com\\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {\n\t\t\t\t\tiframe.contentWindow.postMessage( '{\"method\":\"play\"}', '*' );\n\t\t\t\t}\n\t\t\t\t// Generic postMessage API\n\t\t\t\telse {\n\t\t\t\t\tiframe.contentWindow.postMessage( 'slide:start', '*' );\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Stop playback of any embedded content inside of\n\t * the targeted slide.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tstopEmbeddedContent( element, options = {} ) {\n\n\t\toptions = extend( {\n\t\t\t// Defaults\n\t\t\tunloadIframes: true\n\t\t}, options );\n\n\t\tif( element && element.parentNode ) {\n\t\t\t// HTML5 media elements\n\t\t\tqueryAll( element, 'video, audio' ).forEach( el => {\n\t\t\t\tif( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) {\n\t\t\t\t\tel.setAttribute('data-paused-by-reveal', '');\n\t\t\t\t\tel.pause();\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\t// Generic postMessage API for non-lazy loaded iframes\n\t\t\tqueryAll( element, 'iframe' ).forEach( el => {\n\t\t\t\tif( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' );\n\t\t\t\tel.removeEventListener( 'load', this.startEmbeddedIframe );\n\t\t\t});\n\n\t\t\t// YouTube postMessage API\n\t\t\tqueryAll( element, 'iframe[src*=\"youtube.com/embed/\"]' ).forEach( el => {\n\t\t\t\tif( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {\n\t\t\t\t\tel.contentWindow.postMessage( '{\"event\":\"command\",\"func\":\"pauseVideo\",\"args\":\"\"}', '*' );\n\t\t\t\t}\n\t\t\t});\n\n\t\t\t// Vimeo postMessage API\n\t\t\tqueryAll( element, 'iframe[src*=\"player.vimeo.com/\"]' ).forEach( el => {\n\t\t\t\tif( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {\n\t\t\t\t\tel.contentWindow.postMessage( '{\"method\":\"pause\"}', '*' );\n\t\t\t\t}\n\t\t\t});\n\n\t\t\tif( options.unloadIframes === true ) {\n\t\t\t\t// Unload lazy-loaded iframes\n\t\t\t\tqueryAll( element, 'iframe[data-src]' ).forEach( el => {\n\t\t\t\t\t// Only removing the src doesn't actually unload the frame\n\t\t\t\t\t// in all browsers (Firefox) so we set it to blank first\n\t\t\t\t\tel.setAttribute( 'src', 'about:blank' );\n\t\t\t\t\tel.removeAttribute( 'src' );\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\n\t}\n\n}\n","\nexport const SLIDES_SELECTOR = '.slides section';\nexport const HORIZONTAL_SLIDES_SELECTOR = '.slides>section';\nexport const VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section';\nexport const HORIZONTAL_BACKGROUNDS_SELECTOR = '.backgrounds>.slide-background';\n\n// Methods that may not be invoked via the postMessage API\nexport const POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener|showPreview/;\n\n// Regex for retrieving the fragment style from a class attribute\nexport const FRAGMENT_STYLE_REGEX = /fade-(down|up|right|left|out|in-then-out|in-then-semi-out)|semi-fade-out|current-visible|shrink|grow/;\n\n// Slide number formats\nexport const SLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL = 'h.v';\nexport const SLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL = 'h/v';\nexport const SLIDE_NUMBER_FORMAT_CURRENT = 'c';\nexport const SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL = 'c/t';","import {\n\tSLIDE_NUMBER_FORMAT_CURRENT,\n\tSLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL,\n\tSLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL,\n\tSLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL\n} from \"../utils/constants\";\n\n/**\n * Handles the display of reveal.js' optional slide number.\n */\nexport default class SlideNumber {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'slide-number';\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tlet slideNumberDisplay = 'none';\n\t\tif( config.slideNumber && !this.Reveal.isPrintView() ) {\n\t\t\tif( config.showSlideNumber === 'all' ) {\n\t\t\t\tslideNumberDisplay = 'block';\n\t\t\t}\n\t\t\telse if( config.showSlideNumber === 'speaker' && this.Reveal.isSpeakerNotes() ) {\n\t\t\t\tslideNumberDisplay = 'block';\n\t\t\t}\n\t\t}\n\n\t\tthis.element.style.display = slideNumberDisplay;\n\n\t}\n\n\t/**\n\t * Updates the slide number to match the current slide.\n\t */\n\tupdate() {\n\n\t\t// Update slide number if enabled\n\t\tif( this.Reveal.getConfig().slideNumber && this.element ) {\n\t\t\tthis.element.innerHTML = this.getSlideNumber();\n\t\t}\n\n\t}\n\n\t/**\n\t * Returns the HTML string corresponding to the current slide\n\t * number, including formatting.\n\t */\n\tgetSlideNumber( slide = this.Reveal.getCurrentSlide() ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\t\tlet value;\n\t\tlet format = SLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL;\n\n\t\tif ( typeof config.slideNumber === 'function' ) {\n\t\t\tvalue = config.slideNumber( slide );\n\t\t} else {\n\t\t\t// Check if a custom number format is available\n\t\t\tif( typeof config.slideNumber === 'string' ) {\n\t\t\t\tformat = config.slideNumber;\n\t\t\t}\n\n\t\t\t// If there are ONLY vertical slides in this deck, always use\n\t\t\t// a flattened slide number\n\t\t\tif( !/c/.test( format ) && this.Reveal.getHorizontalSlides().length === 1 ) {\n\t\t\t\tformat = SLIDE_NUMBER_FORMAT_CURRENT;\n\t\t\t}\n\n\t\t\t// Offset the current slide number by 1 to make it 1-indexed\n\t\t\tlet horizontalOffset = slide && slide.dataset.visibility === 'uncounted' ? 0 : 1;\n\n\t\t\tvalue = [];\n\t\t\tswitch( format ) {\n\t\t\t\tcase SLIDE_NUMBER_FORMAT_CURRENT:\n\t\t\t\t\tvalue.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset );\n\t\t\t\t\tbreak;\n\t\t\t\tcase SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL:\n\t\t\t\t\tvalue.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset, '/', this.Reveal.getTotalSlides() );\n\t\t\t\t\tbreak;\n\t\t\t\tdefault:\n\t\t\t\t\tlet indices = this.Reveal.getIndices( slide );\n\t\t\t\t\tvalue.push( indices.h + horizontalOffset );\n\t\t\t\t\tlet sep = format === SLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL ? '/' : '.';\n\t\t\t\t\tif( this.Reveal.isVerticalSlide( slide ) ) value.push( sep, indices.v + 1 );\n\t\t\t}\n\t\t}\n\n\t\tlet url = '#' + this.Reveal.location.getHash( slide );\n\t\treturn this.formatNumber( value[0], value[1], value[2], url );\n\n\t}\n\n\t/**\n\t * Applies HTML formatting to a slide number before it's\n\t * written to the DOM.\n\t *\n\t * @param {number} a Current slide\n\t * @param {string} delimiter Character to separate slide numbers\n\t * @param {(number|*)} b Total slides\n\t * @param {HTMLElement} [url='#'+locationHash()] The url to link to\n\t * @return {string} HTML string fragment\n\t */\n\tformatNumber( a, delimiter, b, url = '#' + this.Reveal.location.getHash() ) {\n\n\t\tif( typeof b === 'number' && !isNaN( b ) ) {\n\t\t\treturn `<a href=\"${url}\">\n\t\t\t\t\t<span class=\"slide-number-a\">${a}</span>\n\t\t\t\t\t<span class=\"slide-number-delimiter\">${delimiter}</span>\n\t\t\t\t\t<span class=\"slide-number-b\">${b}</span>\n\t\t\t\t\t</a>`;\n\t\t}\n\t\telse {\n\t\t\treturn `<a href=\"${url}\">\n\t\t\t\t\t<span class=\"slide-number-a\">${a}</span>\n\t\t\t\t\t</a>`;\n\t\t}\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}","import {\n\tSLIDE_NUMBER_FORMAT_CURRENT,\n\tSLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL\n} from \"../utils/constants\";\n\n/**\n * Makes it possible to jump to a slide by entering its\n * slide number or id.\n */\nexport default class JumpToSlide {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onInput = this.onInput.bind( this );\n\t\tthis.onBlur = this.onBlur.bind( this );\n\t\tthis.onKeyDown = this.onKeyDown.bind( this );\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'jump-to-slide';\n\n this.jumpInput = document.createElement( 'input' );\n this.jumpInput.type = 'text';\n this.jumpInput.className = 'jump-to-slide-input';\n this.jumpInput.placeholder = 'Jump to slide';\n\t\tthis.jumpInput.addEventListener( 'input', this.onInput );\n\t\tthis.jumpInput.addEventListener( 'keydown', this.onKeyDown );\n\t\tthis.jumpInput.addEventListener( 'blur', this.onBlur );\n\n this.element.appendChild( this.jumpInput );\n\n\t}\n\n\tshow() {\n\n\t\tthis.indicesOnShow = this.Reveal.getIndices();\n\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\t\tthis.jumpInput.focus();\n\n\t}\n\n\thide() {\n\n\t\tif( this.isVisible() ) {\n\t\t\tthis.element.remove();\n\t\t\tthis.jumpInput.value = '';\n\n\t\t\tclearTimeout( this.jumpTimeout );\n\t\t\tdelete this.jumpTimeout;\n\t\t}\n\n\t}\n\n\tisVisible() {\n\n\t\treturn !!this.element.parentNode;\n\n\t}\n\n\t/**\n\t * Parses the current input and jumps to the given slide.\n\t */\n\tjump() {\n\n\t\tclearTimeout( this.jumpTimeout );\n\t\tdelete this.jumpTimeout;\n\n\t\tlet query = this.jumpInput.value.trim( '' );\n\t\tlet indices;\n\n\t\t// When slide numbers are formatted to be a single linear mumber\n\t\t// (instead of showing a separate horizontal/vertical index) we\n\t\t// use the same format for slide jumps\n\t\tif( /^\\d+$/.test( query ) ) {\n\t\t\tconst slideNumberFormat = this.Reveal.getConfig().slideNumber;\n\t\t\tif( slideNumberFormat === SLIDE_NUMBER_FORMAT_CURRENT || slideNumberFormat === SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL ) {\n\t\t\t\tconst slide = this.Reveal.getSlides()[ parseInt( query, 10 ) - 1 ];\n\t\t\t\tif( slide ) {\n\t\t\t\t\tindices = this.Reveal.getIndices( slide );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif( !indices ) {\n\t\t\t// If the query uses \"horizontal.vertical\" format, convert to\n\t\t\t// \"horizontal/vertical\" so that our URL parser can understand\n\t\t\tif( /^\\d+\\.\\d+$/.test( query ) ) {\n\t\t\t\tquery = query.replace( '.', '/' );\n\t\t\t}\n\n\t\t\tindices = this.Reveal.location.getIndicesFromHash( query, { oneBasedIndex: true } );\n\t\t}\n\n\t\t// Still no valid index? Fall back on a text search\n\t\tif( !indices && /\\S+/i.test( query ) && query.length > 1 ) {\n\t\t\tindices = this.search( query );\n\t\t}\n\n\t\tif( indices && query !== '' ) {\n\t\t\tthis.Reveal.slide( indices.h, indices.v, indices.f );\n\t\t\treturn true;\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.slide( this.indicesOnShow.h, this.indicesOnShow.v, this.indicesOnShow.f );\n\t\t\treturn false;\n\t\t}\n\n\t}\n\n\tjumpAfter( delay ) {\n\n\t\tclearTimeout( this.jumpTimeout );\n\t\tthis.jumpTimeout = setTimeout( () => this.jump(), delay );\n\n\t}\n\n\t/**\n\t * A lofi search that looks for the given query in all\n\t * of our slides and returns the first match.\n\t */\n\tsearch( query ) {\n\n\t\tconst regex = new RegExp( '\\\\b' + query.trim() + '\\\\b', 'i' );\n\n\t\tconst slide = this.Reveal.getSlides().find( ( slide ) => {\n\t\t\treturn regex.test( slide.innerText );\n\t\t} );\n\n\t\tif( slide ) {\n\t\t\treturn this.Reveal.getIndices( slide );\n\t\t}\n\t\telse {\n\t\t\treturn null;\n\t\t}\n\n\t}\n\n\t/**\n\t * Reverts back to the slide we were on when jump to slide was\n\t * invoked.\n\t */\n\tcancel() {\n\n\t\tthis.Reveal.slide( this.indicesOnShow.h, this.indicesOnShow.v, this.indicesOnShow.f );\n\t\tthis.hide();\n\n\t}\n\n\tconfirm() {\n\n\t\tthis.jump();\n\t\tthis.hide();\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.jumpInput.removeEventListener( 'input', this.onInput );\n\t\tthis.jumpInput.removeEventListener( 'keydown', this.onKeyDown );\n\t\tthis.jumpInput.removeEventListener( 'blur', this.onBlur );\n\n\t\tthis.element.remove();\n\n\t}\n\n\tonKeyDown( event ) {\n\n\t\tif( event.keyCode === 13 ) {\n\t\t\tthis.confirm();\n\t\t}\n\t\telse if( event.keyCode === 27 ) {\n\t\t\tthis.cancel();\n\n\t\t\tevent.stopImmediatePropagation();\n\t\t}\n\n\t}\n\n\tonInput( event ) {\n\n\t\tthis.jumpAfter( 200 );\n\n\t}\n\n\tonBlur() {\n\n\t\tsetTimeout( () => this.hide(), 1 );\n\n\t}\n\n}","/**\n * Converts various color input formats to an {r:0,g:0,b:0} object.\n *\n * @param {string} color The string representation of a color\n * @example\n * colorToRgb('#000');\n * @example\n * colorToRgb('#000000');\n * @example\n * colorToRgb('rgb(0,0,0)');\n * @example\n * colorToRgb('rgba(0,0,0)');\n *\n * @return {{r: number, g: number, b: number, [a]: number}|null}\n */\nexport const colorToRgb = ( color ) => {\n\n\tlet hex3 = color.match( /^#([0-9a-f]{3})$/i );\n\tif( hex3 && hex3[1] ) {\n\t\thex3 = hex3[1];\n\t\treturn {\n\t\t\tr: parseInt( hex3.charAt( 0 ), 16 ) * 0x11,\n\t\t\tg: parseInt( hex3.charAt( 1 ), 16 ) * 0x11,\n\t\t\tb: parseInt( hex3.charAt( 2 ), 16 ) * 0x11\n\t\t};\n\t}\n\n\tlet hex6 = color.match( /^#([0-9a-f]{6})$/i );\n\tif( hex6 && hex6[1] ) {\n\t\thex6 = hex6[1];\n\t\treturn {\n\t\t\tr: parseInt( hex6.slice( 0, 2 ), 16 ),\n\t\t\tg: parseInt( hex6.slice( 2, 4 ), 16 ),\n\t\t\tb: parseInt( hex6.slice( 4, 6 ), 16 )\n\t\t};\n\t}\n\n\tlet rgb = color.match( /^rgb\\s*\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*\\)$/i );\n\tif( rgb ) {\n\t\treturn {\n\t\t\tr: parseInt( rgb[1], 10 ),\n\t\t\tg: parseInt( rgb[2], 10 ),\n\t\t\tb: parseInt( rgb[3], 10 )\n\t\t};\n\t}\n\n\tlet rgba = color.match( /^rgba\\s*\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*\\,\\s*([\\d]+|[\\d]*.[\\d]+)\\s*\\)$/i );\n\tif( rgba ) {\n\t\treturn {\n\t\t\tr: parseInt( rgba[1], 10 ),\n\t\t\tg: parseInt( rgba[2], 10 ),\n\t\t\tb: parseInt( rgba[3], 10 ),\n\t\t\ta: parseFloat( rgba[4] )\n\t\t};\n\t}\n\n\treturn null;\n\n}\n\n/**\n * Calculates brightness on a scale of 0-255.\n *\n * @param {string} color See colorToRgb for supported formats.\n * @see {@link colorToRgb}\n */\nexport const colorBrightness = ( color ) => {\n\n\tif( typeof color === 'string' ) color = colorToRgb( color );\n\n\tif( color ) {\n\t\treturn ( color.r * 299 + color.g * 587 + color.b * 114 ) / 1000;\n\t}\n\n\treturn null;\n\n}","import { queryAll } from '../utils/util.js'\nimport { colorToRgb, colorBrightness } from '../utils/color.js'\n\n/**\n * Creates and updates slide backgrounds.\n */\nexport default class Backgrounds {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'backgrounds';\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t}\n\n\t/**\n\t * Creates the slide background elements and appends them\n\t * to the background container. One element is created per\n\t * slide no matter if the given slide has visible background.\n\t */\n\tcreate() {\n\n\t\t// Clear prior backgrounds\n\t\tthis.element.innerHTML = '';\n\t\tthis.element.classList.add( 'no-transition' );\n\n\t\t// Iterate over all horizontal slides\n\t\tthis.Reveal.getHorizontalSlides().forEach( slideh => {\n\n\t\t\tlet backgroundStack = this.createBackground( slideh, this.element );\n\n\t\t\t// Iterate over all vertical slides\n\t\t\tqueryAll( slideh, 'section' ).forEach( slidev => {\n\n\t\t\t\tthis.createBackground( slidev, backgroundStack );\n\n\t\t\t\tbackgroundStack.classList.add( 'stack' );\n\n\t\t\t} );\n\n\t\t} );\n\n\t\t// Add parallax background if specified\n\t\tif( this.Reveal.getConfig().parallaxBackgroundImage ) {\n\n\t\t\tthis.element.style.backgroundImage = 'url(\"' + this.Reveal.getConfig().parallaxBackgroundImage + '\")';\n\t\t\tthis.element.style.backgroundSize = this.Reveal.getConfig().parallaxBackgroundSize;\n\t\t\tthis.element.style.backgroundRepeat = this.Reveal.getConfig().parallaxBackgroundRepeat;\n\t\t\tthis.element.style.backgroundPosition = this.Reveal.getConfig().parallaxBackgroundPosition;\n\n\t\t\t// Make sure the below properties are set on the element - these properties are\n\t\t\t// needed for proper transitions to be set on the element via CSS. To remove\n\t\t\t// annoying background slide-in effect when the presentation starts, apply\n\t\t\t// these properties after short time delay\n\t\t\tsetTimeout( () => {\n\t\t\t\tthis.Reveal.getRevealElement().classList.add( 'has-parallax-background' );\n\t\t\t}, 1 );\n\n\t\t}\n\t\telse {\n\n\t\t\tthis.element.style.backgroundImage = '';\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'has-parallax-background' );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Creates a background for the given slide.\n\t *\n\t * @param {HTMLElement} slide\n\t * @param {HTMLElement} container The element that the background\n\t * should be appended to\n\t * @return {HTMLElement} New background div\n\t */\n\tcreateBackground( slide, container ) {\n\n\t\t// Main slide background element\n\t\tlet element = document.createElement( 'div' );\n\t\telement.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' );\n\n\t\t// Inner background element that wraps images/videos/iframes\n\t\tlet contentElement = document.createElement( 'div' );\n\t\tcontentElement.className = 'slide-background-content';\n\n\t\telement.appendChild( contentElement );\n\t\tcontainer.appendChild( element );\n\n\t\tslide.slideBackgroundElement = element;\n\t\tslide.slideBackgroundContentElement = contentElement;\n\n\t\t// Syncs the background to reflect all current background settings\n\t\tthis.sync( slide );\n\n\t\treturn element;\n\n\t}\n\n\t/**\n\t * Renders all of the visual properties of a slide background\n\t * based on the various background attributes.\n\t *\n\t * @param {HTMLElement} slide\n\t */\n\tsync( slide ) {\n\n\t\tconst element = slide.slideBackgroundElement,\n\t\t\tcontentElement = slide.slideBackgroundContentElement;\n\n\t\tconst data = {\n\t\t\tbackground: slide.getAttribute( 'data-background' ),\n\t\t\tbackgroundSize: slide.getAttribute( 'data-background-size' ),\n\t\t\tbackgroundImage: slide.getAttribute( 'data-background-image' ),\n\t\t\tbackgroundVideo: slide.getAttribute( 'data-background-video' ),\n\t\t\tbackgroundIframe: slide.getAttribute( 'data-background-iframe' ),\n\t\t\tbackgroundColor: slide.getAttribute( 'data-background-color' ),\n\t\t\tbackgroundGradient: slide.getAttribute( 'data-background-gradient' ),\n\t\t\tbackgroundRepeat: slide.getAttribute( 'data-background-repeat' ),\n\t\t\tbackgroundPosition: slide.getAttribute( 'data-background-position' ),\n\t\t\tbackgroundTransition: slide.getAttribute( 'data-background-transition' ),\n\t\t\tbackgroundOpacity: slide.getAttribute( 'data-background-opacity' ),\n\t\t};\n\n\t\tconst dataPreload = slide.hasAttribute( 'data-preload' );\n\n\t\t// Reset the prior background state in case this is not the\n\t\t// initial sync\n\t\tslide.classList.remove( 'has-dark-background' );\n\t\tslide.classList.remove( 'has-light-background' );\n\n\t\telement.removeAttribute( 'data-loaded' );\n\t\telement.removeAttribute( 'data-background-hash' );\n\t\telement.removeAttribute( 'data-background-size' );\n\t\telement.removeAttribute( 'data-background-transition' );\n\t\telement.style.backgroundColor = '';\n\n\t\tcontentElement.style.backgroundSize = '';\n\t\tcontentElement.style.backgroundRepeat = '';\n\t\tcontentElement.style.backgroundPosition = '';\n\t\tcontentElement.style.backgroundImage = '';\n\t\tcontentElement.style.opacity = '';\n\t\tcontentElement.innerHTML = '';\n\n\t\tif( data.background ) {\n\t\t\t// Auto-wrap image urls in url(...)\n\t\t\tif( /^(http|file|\\/\\/)/gi.test( data.background ) || /\\.(svg|png|jpg|jpeg|gif|bmp|webp)([?#\\s]|$)/gi.test( data.background ) ) {\n\t\t\t\tslide.setAttribute( 'data-background-image', data.background );\n\t\t\t}\n\t\t\telse {\n\t\t\t\telement.style.background = data.background;\n\t\t\t}\n\t\t}\n\n\t\t// Create a hash for this combination of background settings.\n\t\t// This is used to determine when two slide backgrounds are\n\t\t// the same.\n\t\tif( data.background || data.backgroundColor || data.backgroundGradient || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) {\n\t\t\telement.setAttribute( 'data-background-hash', data.background +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundSize +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundImage +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundVideo +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundIframe +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundColor +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundGradient +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundRepeat +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundPosition +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundTransition +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundOpacity );\n\t\t}\n\n\t\t// Additional and optional background properties\n\t\tif( data.backgroundSize ) element.setAttribute( 'data-background-size', data.backgroundSize );\n\t\tif( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor;\n\t\tif( data.backgroundGradient ) element.style.backgroundImage = data.backgroundGradient;\n\t\tif( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition );\n\n\t\tif( dataPreload ) element.setAttribute( 'data-preload', '' );\n\n\t\t// Background image options are set on the content wrapper\n\t\tif( data.backgroundSize ) contentElement.style.backgroundSize = data.backgroundSize;\n\t\tif( data.backgroundRepeat ) contentElement.style.backgroundRepeat = data.backgroundRepeat;\n\t\tif( data.backgroundPosition ) contentElement.style.backgroundPosition = data.backgroundPosition;\n\t\tif( data.backgroundOpacity ) contentElement.style.opacity = data.backgroundOpacity;\n\n\t\tconst contrastClass = this.getContrastClass( slide );\n\n\t\tif( typeof contrastClass === 'string' ) {\n\t\t\tslide.classList.add( contrastClass );\n\t\t}\n\n\t}\n\n\t/**\n\t * Returns a class name that can be applied to a slide to indicate\n\t * if it has a light or dark background.\n\t *\n\t * @param {*} slide\n\t *\n\t * @returns {string|null}\n\t */\n\tgetContrastClass( slide ) {\n\n\t\tconst element = slide.slideBackgroundElement;\n\n\t\t// If this slide has a background color, we add a class that\n\t\t// signals if it is light or dark. If the slide has no background\n\t\t// color, no class will be added\n\t\tlet contrastColor = slide.getAttribute( 'data-background-color' );\n\n\t\t// If no bg color was found, or it cannot be converted by colorToRgb, check the computed background\n\t\tif( !contrastColor || !colorToRgb( contrastColor ) ) {\n\t\t\tlet computedBackgroundStyle = window.getComputedStyle( element );\n\t\t\tif( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {\n\t\t\t\tcontrastColor = computedBackgroundStyle.backgroundColor;\n\t\t\t}\n\t\t}\n\n\t\tif( contrastColor ) {\n\t\t\tconst rgb = colorToRgb( contrastColor );\n\n\t\t\t// Ignore fully transparent backgrounds. Some browsers return\n\t\t\t// rgba(0,0,0,0) when reading the computed background color of\n\t\t\t// an element with no background\n\t\t\tif( rgb && rgb.a !== 0 ) {\n\t\t\t\tif( colorBrightness( contrastColor ) < 128 ) {\n\t\t\t\t\treturn 'has-dark-background';\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\treturn 'has-light-background';\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\n\t}\n\n\t/**\n\t * Bubble the 'has-light-background'/'has-dark-background' classes.\n\t */\n\tbubbleSlideContrastClassToElement( slide, target ) {\n\n\t\t[ 'has-light-background', 'has-dark-background' ].forEach( classToBubble => {\n\t\t\tif( slide.classList.contains( classToBubble ) ) {\n\t\t\t\ttarget.classList.add( classToBubble );\n\t\t\t}\n\t\t\telse {\n\t\t\t\ttarget.classList.remove( classToBubble );\n\t\t\t}\n\t\t}, this );\n\n\t}\n\n\t/**\n\t * Updates the background elements to reflect the current\n\t * slide.\n\t *\n\t * @param {boolean} includeAll If true, the backgrounds of\n\t * all vertical slides (not just the present) will be updated.\n\t */\n\tupdate( includeAll = false ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tlet indices = this.Reveal.getIndices();\n\n\t\tlet currentBackground = null;\n\n\t\t// Reverse past/future classes when in RTL mode\n\t\tlet horizontalPast = config.rtl ? 'future' : 'past',\n\t\t\thorizontalFuture = config.rtl ? 'past' : 'future';\n\n\t\t// Update the classes of all backgrounds to match the\n\t\t// states of their slides (past/present/future)\n\t\tArray.from( this.element.childNodes ).forEach( ( backgroundh, h ) => {\n\n\t\t\tbackgroundh.classList.remove( 'past', 'present', 'future' );\n\n\t\t\tif( h < indices.h ) {\n\t\t\t\tbackgroundh.classList.add( horizontalPast );\n\t\t\t}\n\t\t\telse if ( h > indices.h ) {\n\t\t\t\tbackgroundh.classList.add( horizontalFuture );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tbackgroundh.classList.add( 'present' );\n\n\t\t\t\t// Store a reference to the current background element\n\t\t\t\tcurrentBackground = backgroundh;\n\t\t\t}\n\n\t\t\tif( includeAll || h === indices.h ) {\n\t\t\t\tqueryAll( backgroundh, '.slide-background' ).forEach( ( backgroundv, v ) => {\n\n\t\t\t\t\tbackgroundv.classList.remove( 'past', 'present', 'future' );\n\n\t\t\t\t\tconst indexv = typeof indices.v === 'number' ? indices.v : 0;\n\n\t\t\t\t\tif( v < indexv ) {\n\t\t\t\t\t\tbackgroundv.classList.add( 'past' );\n\t\t\t\t\t}\n\t\t\t\t\telse if ( v > indexv ) {\n\t\t\t\t\t\tbackgroundv.classList.add( 'future' );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tbackgroundv.classList.add( 'present' );\n\n\t\t\t\t\t\t// Only if this is the present horizontal and vertical slide\n\t\t\t\t\t\tif( h === indices.h ) currentBackground = backgroundv;\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\t\t\t}\n\n\t\t} );\n\n\t\t// The previous background may refer to a DOM element that has\n\t\t// been removed after a presentation is synced & bgs are recreated\n\t\tif( this.previousBackground && !this.previousBackground.closest( 'body' ) ) {\n\t\t\tthis.previousBackground = null;\n\t\t}\n\n\t\tif( currentBackground && this.previousBackground ) {\n\n\t\t\t// Don't transition between identical backgrounds. This\n\t\t\t// prevents unwanted flicker.\n\t\t\tlet previousBackgroundHash = this.previousBackground.getAttribute( 'data-background-hash' );\n\t\t\tlet currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' );\n\n\t\t\tif( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== this.previousBackground ) {\n\t\t\t\tthis.element.classList.add( 'no-transition' );\n\n\t\t\t\t// If multiple slides have the same background video, carry\n\t\t\t\t// the <video> element forward so that it plays continuously\n\t\t\t\t// across multiple slides\n\t\t\t\tconst currentVideo = currentBackground.querySelector( 'video' );\n\t\t\t\tconst previousVideo = this.previousBackground.querySelector( 'video' );\n\n\t\t\t\tif( currentVideo && previousVideo ) {\n\n\t\t\t\t\tconst currentVideoParent = currentVideo.parentNode;\n\t\t\t\t\tconst previousVideoParent = previousVideo.parentNode;\n\n\t\t\t\t\t// Swap the two videos\n\t\t\t\t\tpreviousVideoParent.appendChild( currentVideo );\n\t\t\t\t\tcurrentVideoParent.appendChild( previousVideo );\n\n\t\t\t\t}\n\t\t\t}\n\n\t\t}\n\n\t\t// Stop content inside of previous backgrounds\n\t\tif( this.previousBackground ) {\n\n\t\t\tthis.Reveal.slideContent.stopEmbeddedContent( this.previousBackground, { unloadIframes: !this.Reveal.slideContent.shouldPreload( this.previousBackground ) } );\n\n\t\t}\n\n\t\t// Start content in the current background\n\t\tif( currentBackground ) {\n\n\t\t\tthis.Reveal.slideContent.startEmbeddedContent( currentBackground );\n\n\t\t\tlet currentBackgroundContent = currentBackground.querySelector( '.slide-background-content' );\n\t\t\tif( currentBackgroundContent ) {\n\n\t\t\t\tlet backgroundImageURL = currentBackgroundContent.style.backgroundImage || '';\n\n\t\t\t\t// Restart GIFs (doesn't work in Firefox)\n\t\t\t\tif( /\\.gif/i.test( backgroundImageURL ) ) {\n\t\t\t\t\tcurrentBackgroundContent.style.backgroundImage = '';\n\t\t\t\t\twindow.getComputedStyle( currentBackgroundContent ).opacity;\n\t\t\t\t\tcurrentBackgroundContent.style.backgroundImage = backgroundImageURL;\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis.previousBackground = currentBackground;\n\n\t\t}\n\n\t\t// If there's a background brightness flag for this slide,\n\t\t// bubble it to the .reveal container\n\t\tif( currentSlide ) {\n\t\t\tthis.bubbleSlideContrastClassToElement( currentSlide, this.Reveal.getRevealElement() );\n\t\t}\n\n\t\t// Allow the first background to apply without transition\n\t\tsetTimeout( () => {\n\t\t\tthis.element.classList.remove( 'no-transition' );\n\t\t}, 10 );\n\n\t}\n\n\t/**\n\t * Updates the position of the parallax background based\n\t * on the current slide index.\n\t */\n\tupdateParallax() {\n\n\t\tlet indices = this.Reveal.getIndices();\n\n\t\tif( this.Reveal.getConfig().parallaxBackgroundImage ) {\n\n\t\t\tlet horizontalSlides = this.Reveal.getHorizontalSlides(),\n\t\t\t\tverticalSlides = this.Reveal.getVerticalSlides();\n\n\t\t\tlet backgroundSize = this.element.style.backgroundSize.split( ' ' ),\n\t\t\t\tbackgroundWidth, backgroundHeight;\n\n\t\t\tif( backgroundSize.length === 1 ) {\n\t\t\t\tbackgroundWidth = backgroundHeight = parseInt( backgroundSize[0], 10 );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tbackgroundWidth = parseInt( backgroundSize[0], 10 );\n\t\t\t\tbackgroundHeight = parseInt( backgroundSize[1], 10 );\n\t\t\t}\n\n\t\t\tlet slideWidth = this.element.offsetWidth,\n\t\t\t\thorizontalSlideCount = horizontalSlides.length,\n\t\t\t\thorizontalOffsetMultiplier,\n\t\t\t\thorizontalOffset;\n\n\t\t\tif( typeof this.Reveal.getConfig().parallaxBackgroundHorizontal === 'number' ) {\n\t\t\t\thorizontalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundHorizontal;\n\t\t\t}\n\t\t\telse {\n\t\t\t\thorizontalOffsetMultiplier = horizontalSlideCount > 1 ? ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) : 0;\n\t\t\t}\n\n\t\t\thorizontalOffset = horizontalOffsetMultiplier * indices.h * -1;\n\n\t\t\tlet slideHeight = this.element.offsetHeight,\n\t\t\t\tverticalSlideCount = verticalSlides.length,\n\t\t\t\tverticalOffsetMultiplier,\n\t\t\t\tverticalOffset;\n\n\t\t\tif( typeof this.Reveal.getConfig().parallaxBackgroundVertical === 'number' ) {\n\t\t\t\tverticalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundVertical;\n\t\t\t}\n\t\t\telse {\n\t\t\t\tverticalOffsetMultiplier = ( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 );\n\t\t\t}\n\n\t\t\tverticalOffset = verticalSlideCount > 0 ? verticalOffsetMultiplier * indices.v : 0;\n\n\t\t\tthis.element.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px';\n\n\t\t}\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}\n","import { queryAll, extend, createStyleSheet, matches, closest } from '../utils/util.js'\nimport { FRAGMENT_STYLE_REGEX } from '../utils/constants.js'\n\n// Counter used to generate unique IDs for auto-animated elements\nlet autoAnimateCounter = 0;\n\n/**\n * Automatically animates matching elements across\n * slides with the [data-auto-animate] attribute.\n */\nexport default class AutoAnimate {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\t/**\n\t * Runs an auto-animation between the given slides.\n\t *\n\t * @param {HTMLElement} fromSlide\n\t * @param {HTMLElement} toSlide\n\t */\n\trun( fromSlide, toSlide ) {\n\n\t\t// Clean up after prior animations\n\t\tthis.reset();\n\n\t\tlet allSlides = this.Reveal.getSlides();\n\t\tlet toSlideIndex = allSlides.indexOf( toSlide );\n\t\tlet fromSlideIndex = allSlides.indexOf( fromSlide );\n\n\t\t// Ensure that;\n\t\t// 1. Both slides exist.\n\t\t// 2. Both slides are auto-animate targets with the same\n\t\t// data-auto-animate-id value (including null if absent on both).\n\t\t// 3. data-auto-animate-restart isn't set on the physically latter\n\t\t// slide (independent of slide direction).\n\t\tif( fromSlide && toSlide && fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' )\n\t\t\t\t&& fromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) \n\t\t\t\t&& !( toSlideIndex > fromSlideIndex ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' ) ) {\n\n\t\t\t// Create a new auto-animate sheet\n\t\t\tthis.autoAnimateStyleSheet = this.autoAnimateStyleSheet || createStyleSheet();\n\n\t\t\tlet animationOptions = this.getAutoAnimateOptions( toSlide );\n\n\t\t\t// Set our starting state\n\t\t\tfromSlide.dataset.autoAnimate = 'pending';\n\t\t\ttoSlide.dataset.autoAnimate = 'pending';\n\n\t\t\t// Flag the navigation direction, needed for fragment buildup\n\t\t\tanimationOptions.slideDirection = toSlideIndex > fromSlideIndex ? 'forward' : 'backward';\n\n\t\t\t// If the from-slide is hidden because it has moved outside\n\t\t\t// the view distance, we need to temporarily show it while\n\t\t\t// measuring\n\t\t\tlet fromSlideIsHidden = fromSlide.style.display === 'none';\n\t\t\tif( fromSlideIsHidden ) fromSlide.style.display = this.Reveal.getConfig().display;\n\n\t\t\t// Inject our auto-animate styles for this transition\n\t\t\tlet css = this.getAutoAnimatableElements( fromSlide, toSlide ).map( elements => {\n\t\t\t\treturn this.autoAnimateElements( elements.from, elements.to, elements.options || {}, animationOptions, autoAnimateCounter++ );\n\t\t\t} );\n\n\t\t\tif( fromSlideIsHidden ) fromSlide.style.display = 'none';\n\n\t\t\t// Animate unmatched elements, if enabled\n\t\t\tif( toSlide.dataset.autoAnimateUnmatched !== 'false' && this.Reveal.getConfig().autoAnimateUnmatched === true ) {\n\n\t\t\t\t// Our default timings for unmatched elements\n\t\t\t\tlet defaultUnmatchedDuration = animationOptions.duration * 0.8,\n\t\t\t\t\tdefaultUnmatchedDelay = animationOptions.duration * 0.2;\n\n\t\t\t\tthis.getUnmatchedAutoAnimateElements( toSlide ).forEach( unmatchedElement => {\n\n\t\t\t\t\tlet unmatchedOptions = this.getAutoAnimateOptions( unmatchedElement, animationOptions );\n\t\t\t\t\tlet id = 'unmatched';\n\n\t\t\t\t\t// If there is a duration or delay set specifically for this\n\t\t\t\t\t// element our unmatched elements should adhere to those\n\t\t\t\t\tif( unmatchedOptions.duration !== animationOptions.duration || unmatchedOptions.delay !== animationOptions.delay ) {\n\t\t\t\t\t\tid = 'unmatched-' + autoAnimateCounter++;\n\t\t\t\t\t\tcss.push( `[data-auto-animate=\"running\"] [data-auto-animate-target=\"${id}\"] { transition: opacity ${unmatchedOptions.duration}s ease ${unmatchedOptions.delay}s; }` );\n\t\t\t\t\t}\n\n\t\t\t\t\tunmatchedElement.dataset.autoAnimateTarget = id;\n\n\t\t\t\t}, this );\n\n\t\t\t\t// Our default transition for unmatched elements\n\t\t\t\tcss.push( `[data-auto-animate=\"running\"] [data-auto-animate-target=\"unmatched\"] { transition: opacity ${defaultUnmatchedDuration}s ease ${defaultUnmatchedDelay}s; }` );\n\n\t\t\t}\n\n\t\t\t// Setting the whole chunk of CSS at once is the most\n\t\t\t// efficient way to do this. Using sheet.insertRule\n\t\t\t// is multiple factors slower.\n\t\t\tthis.autoAnimateStyleSheet.innerHTML = css.join( '' );\n\n\t\t\t// Start the animation next cycle\n\t\t\trequestAnimationFrame( () => {\n\t\t\t\tif( this.autoAnimateStyleSheet ) {\n\t\t\t\t\t// This forces our newly injected styles to be applied in Firefox\n\t\t\t\t\tgetComputedStyle( this.autoAnimateStyleSheet ).fontWeight;\n\n\t\t\t\t\ttoSlide.dataset.autoAnimate = 'running';\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'autoanimate',\n\t\t\t\tdata: {\n\t\t\t\t\tfromSlide,\n\t\t\t\t\ttoSlide,\n\t\t\t\t\tsheet: this.autoAnimateStyleSheet\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Rolls back all changes that we've made to the DOM so\n\t * that as part of animating.\n\t */\n\treset() {\n\n\t\t// Reset slides\n\t\tqueryAll( this.Reveal.getRevealElement(), '[data-auto-animate]:not([data-auto-animate=\"\"])' ).forEach( element => {\n\t\t\telement.dataset.autoAnimate = '';\n\t\t} );\n\n\t\t// Reset elements\n\t\tqueryAll( this.Reveal.getRevealElement(), '[data-auto-animate-target]' ).forEach( element => {\n\t\t\tdelete element.dataset.autoAnimateTarget;\n\t\t} );\n\n\t\t// Remove the animation sheet\n\t\tif( this.autoAnimateStyleSheet && this.autoAnimateStyleSheet.parentNode ) {\n\t\t\tthis.autoAnimateStyleSheet.parentNode.removeChild( this.autoAnimateStyleSheet );\n\t\t\tthis.autoAnimateStyleSheet = null;\n\t\t}\n\n\t}\n\n\t/**\n\t * Creates a FLIP animation where the `to` element starts out\n\t * in the `from` element position and animates to its original\n\t * state.\n\t *\n\t * @param {HTMLElement} from\n\t * @param {HTMLElement} to\n\t * @param {Object} elementOptions Options for this element pair\n\t * @param {Object} animationOptions Options set at the slide level\n\t * @param {String} id Unique ID that we can use to identify this\n\t * auto-animate element in the DOM\n\t */\n\tautoAnimateElements( from, to, elementOptions, animationOptions, id ) {\n\n\t\t// 'from' elements are given a data-auto-animate-target with no value,\n\t\t// 'to' elements are are given a data-auto-animate-target with an ID\n\t\tfrom.dataset.autoAnimateTarget = '';\n\t\tto.dataset.autoAnimateTarget = id;\n\n\t\t// Each element may override any of the auto-animate options\n\t\t// like transition easing, duration and delay via data-attributes\n\t\tlet options = this.getAutoAnimateOptions( to, animationOptions );\n\n\t\t// If we're using a custom element matcher the element options\n\t\t// may contain additional transition overrides\n\t\tif( typeof elementOptions.delay !== 'undefined' ) options.delay = elementOptions.delay;\n\t\tif( typeof elementOptions.duration !== 'undefined' ) options.duration = elementOptions.duration;\n\t\tif( typeof elementOptions.easing !== 'undefined' ) options.easing = elementOptions.easing;\n\n\t\tlet fromProps = this.getAutoAnimatableProperties( 'from', from, elementOptions ),\n\t\t\ttoProps = this.getAutoAnimatableProperties( 'to', to, elementOptions );\n\n\t\t// Maintain fragment visibility for matching elements when\n\t\t// we're navigating forwards, this way the viewer won't need\n\t\t// to step through the same fragments twice\n\t\tif( to.classList.contains( 'fragment' ) ) {\n\n\t\t\t// Don't auto-animate the opacity of fragments to avoid\n\t\t\t// conflicts with fragment animations\n\t\t\tdelete toProps.styles['opacity'];\n\n\t\t\tif( from.classList.contains( 'fragment' ) ) {\n\n\t\t\t\tlet fromFragmentStyle = ( from.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];\n\t\t\t\tlet toFragmentStyle = ( to.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];\n\n\t\t\t\t// Only skip the fragment if the fragment animation style\n\t\t\t\t// remains unchanged\n\t\t\t\tif( fromFragmentStyle === toFragmentStyle && animationOptions.slideDirection === 'forward' ) {\n\t\t\t\t\tto.classList.add( 'visible', 'disabled' );\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// If translation and/or scaling are enabled, css transform\n\t\t// the 'to' element so that it matches the position and size\n\t\t// of the 'from' element\n\t\tif( elementOptions.translate !== false || elementOptions.scale !== false ) {\n\n\t\t\tlet presentationScale = this.Reveal.getScale();\n\n\t\t\tlet delta = {\n\t\t\t\tx: ( fromProps.x - toProps.x ) / presentationScale,\n\t\t\t\ty: ( fromProps.y - toProps.y ) / presentationScale,\n\t\t\t\tscaleX: fromProps.width / toProps.width,\n\t\t\t\tscaleY: fromProps.height / toProps.height\n\t\t\t};\n\n\t\t\t// Limit decimal points to avoid 0.0001px blur and stutter\n\t\t\tdelta.x = Math.round( delta.x * 1000 ) / 1000;\n\t\t\tdelta.y = Math.round( delta.y * 1000 ) / 1000;\n\t\t\tdelta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;\n\t\t\tdelta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;\n\n\t\t\tlet translate = elementOptions.translate !== false && ( delta.x !== 0 || delta.y !== 0 ),\n\t\t\t\tscale = elementOptions.scale !== false && ( delta.scaleX !== 0 || delta.scaleY !== 0 );\n\n\t\t\t// No need to transform if nothing's changed\n\t\t\tif( translate || scale ) {\n\n\t\t\t\tlet transform = [];\n\n\t\t\t\tif( translate ) transform.push( `translate(${delta.x}px, ${delta.y}px)` );\n\t\t\t\tif( scale ) transform.push( `scale(${delta.scaleX}, ${delta.scaleY})` );\n\n\t\t\t\tfromProps.styles['transform'] = transform.join( ' ' );\n\t\t\t\tfromProps.styles['transform-origin'] = 'top left';\n\n\t\t\t\ttoProps.styles['transform'] = 'none';\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Delete all unchanged 'to' styles\n\t\tfor( let propertyName in toProps.styles ) {\n\t\t\tconst toValue = toProps.styles[propertyName];\n\t\t\tconst fromValue = fromProps.styles[propertyName];\n\n\t\t\tif( toValue === fromValue ) {\n\t\t\t\tdelete toProps.styles[propertyName];\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// If these property values were set via a custom matcher providing\n\t\t\t\t// an explicit 'from' and/or 'to' value, we always inject those values.\n\t\t\t\tif( toValue.explicitValue === true ) {\n\t\t\t\t\ttoProps.styles[propertyName] = toValue.value;\n\t\t\t\t}\n\n\t\t\t\tif( fromValue.explicitValue === true ) {\n\t\t\t\t\tfromProps.styles[propertyName] = fromValue.value;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tlet css = '';\n\n\t\tlet toStyleProperties = Object.keys( toProps.styles );\n\n\t\t// Only create animate this element IF at least one style\n\t\t// property has changed\n\t\tif( toStyleProperties.length > 0 ) {\n\n\t\t\t// Instantly move to the 'from' state\n\t\t\tfromProps.styles['transition'] = 'none';\n\n\t\t\t// Animate towards the 'to' state\n\t\t\ttoProps.styles['transition'] = `all ${options.duration}s ${options.easing} ${options.delay}s`;\n\t\t\ttoProps.styles['transition-property'] = toStyleProperties.join( ', ' );\n\t\t\ttoProps.styles['will-change'] = toStyleProperties.join( ', ' );\n\n\t\t\t// Build up our custom CSS. We need to override inline styles\n\t\t\t// so we need to make our styles vErY IMPORTANT!1!!\n\t\t\tlet fromCSS = Object.keys( fromProps.styles ).map( propertyName => {\n\t\t\t\treturn propertyName + ': ' + fromProps.styles[propertyName] + ' !important;';\n\t\t\t} ).join( '' );\n\n\t\t\tlet toCSS = Object.keys( toProps.styles ).map( propertyName => {\n\t\t\t\treturn propertyName + ': ' + toProps.styles[propertyName] + ' !important;';\n\t\t\t} ).join( '' );\n\n\t\t\tcss = \t'[data-auto-animate-target=\"'+ id +'\"] {'+ fromCSS +'}' +\n\t\t\t\t\t'[data-auto-animate=\"running\"] [data-auto-animate-target=\"'+ id +'\"] {'+ toCSS +'}';\n\n\t\t}\n\n\t\treturn css;\n\n\t}\n\n\t/**\n\t * Returns the auto-animate options for the given element.\n\t *\n\t * @param {HTMLElement} element Element to pick up options\n\t * from, either a slide or an animation target\n\t * @param {Object} [inheritedOptions] Optional set of existing\n\t * options\n\t */\n\tgetAutoAnimateOptions( element, inheritedOptions ) {\n\n\t\tlet options = {\n\t\t\teasing: this.Reveal.getConfig().autoAnimateEasing,\n\t\t\tduration: this.Reveal.getConfig().autoAnimateDuration,\n\t\t\tdelay: 0\n\t\t};\n\n\t\toptions = extend( options, inheritedOptions );\n\n\t\t// Inherit options from parent elements\n\t\tif( element.parentNode ) {\n\t\t\tlet autoAnimatedParent = closest( element.parentNode, '[data-auto-animate-target]' );\n\t\t\tif( autoAnimatedParent ) {\n\t\t\t\toptions = this.getAutoAnimateOptions( autoAnimatedParent, options );\n\t\t\t}\n\t\t}\n\n\t\tif( element.dataset.autoAnimateEasing ) {\n\t\t\toptions.easing = element.dataset.autoAnimateEasing;\n\t\t}\n\n\t\tif( element.dataset.autoAnimateDuration ) {\n\t\t\toptions.duration = parseFloat( element.dataset.autoAnimateDuration );\n\t\t}\n\n\t\tif( element.dataset.autoAnimateDelay ) {\n\t\t\toptions.delay = parseFloat( element.dataset.autoAnimateDelay );\n\t\t}\n\n\t\treturn options;\n\n\t}\n\n\t/**\n\t * Returns an object containing all of the properties\n\t * that can be auto-animated for the given element and\n\t * their current computed values.\n\t *\n\t * @param {String} direction 'from' or 'to'\n\t */\n\tgetAutoAnimatableProperties( direction, element, elementOptions ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\n\t\tlet properties = { styles: [] };\n\n\t\t// Position and size\n\t\tif( elementOptions.translate !== false || elementOptions.scale !== false ) {\n\t\t\tlet bounds;\n\n\t\t\t// Custom auto-animate may optionally return a custom tailored\n\t\t\t// measurement function\n\t\t\tif( typeof elementOptions.measure === 'function' ) {\n\t\t\t\tbounds = elementOptions.measure( element );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tif( config.center ) {\n\t\t\t\t\t// More precise, but breaks when used in combination\n\t\t\t\t\t// with zoom for scaling the deck ¯\\_(ツ)_/¯\n\t\t\t\t\tbounds = element.getBoundingClientRect();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tlet scale = this.Reveal.getScale();\n\t\t\t\t\tbounds = {\n\t\t\t\t\t\tx: element.offsetLeft * scale,\n\t\t\t\t\t\ty: element.offsetTop * scale,\n\t\t\t\t\t\twidth: element.offsetWidth * scale,\n\t\t\t\t\t\theight: element.offsetHeight * scale\n\t\t\t\t\t};\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tproperties.x = bounds.x;\n\t\t\tproperties.y = bounds.y;\n\t\t\tproperties.width = bounds.width;\n\t\t\tproperties.height = bounds.height;\n\t\t}\n\n\t\tconst computedStyles = getComputedStyle( element );\n\n\t\t// CSS styles\n\t\t( elementOptions.styles || config.autoAnimateStyles ).forEach( style => {\n\t\t\tlet value;\n\n\t\t\t// `style` is either the property name directly, or an object\n\t\t\t// definition of a style property\n\t\t\tif( typeof style === 'string' ) style = { property: style };\n\n\t\t\tif( typeof style.from !== 'undefined' && direction === 'from' ) {\n\t\t\t\tvalue = { value: style.from, explicitValue: true };\n\t\t\t}\n\t\t\telse if( typeof style.to !== 'undefined' && direction === 'to' ) {\n\t\t\t\tvalue = { value: style.to, explicitValue: true };\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// Use a unitless value for line-height so that it inherits properly\n\t\t\t\tif( style.property === 'line-height' ) {\n\t\t\t\t\tvalue = parseFloat( computedStyles['line-height'] ) / parseFloat( computedStyles['font-size'] );\n\t\t\t\t}\n\n\t\t\t\tif( isNaN(value) ) {\n\t\t\t\t\tvalue = computedStyles[style.property];\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif( value !== '' ) {\n\t\t\t\tproperties.styles[style.property] = value;\n\t\t\t}\n\t\t} );\n\n\t\treturn properties;\n\n\t}\n\n\t/**\n\t * Get a list of all element pairs that we can animate\n\t * between the given slides.\n\t *\n\t * @param {HTMLElement} fromSlide\n\t * @param {HTMLElement} toSlide\n\t *\n\t * @return {Array} Each value is an array where [0] is\n\t * the element we're animating from and [1] is the\n\t * element we're animating to\n\t */\n\tgetAutoAnimatableElements( fromSlide, toSlide ) {\n\n\t\tlet matcher = typeof this.Reveal.getConfig().autoAnimateMatcher === 'function' ? this.Reveal.getConfig().autoAnimateMatcher : this.getAutoAnimatePairs;\n\n\t\tlet pairs = matcher.call( this, fromSlide, toSlide );\n\n\t\tlet reserved = [];\n\n\t\t// Remove duplicate pairs\n\t\treturn pairs.filter( ( pair, index ) => {\n\t\t\tif( reserved.indexOf( pair.to ) === -1 ) {\n\t\t\t\treserved.push( pair.to );\n\t\t\t\treturn true;\n\t\t\t}\n\t\t} );\n\n\t}\n\n\t/**\n\t * Identifies matching elements between slides.\n\t *\n\t * You can specify a custom matcher function by using\n\t * the `autoAnimateMatcher` config option.\n\t */\n\tgetAutoAnimatePairs( fromSlide, toSlide ) {\n\n\t\tlet pairs = [];\n\n\t\tconst codeNodes = 'pre';\n\t\tconst textNodes = 'h1, h2, h3, h4, h5, h6, p, li';\n\t\tconst mediaNodes = 'img, video, iframe';\n\n\t\t// Explicit matches via data-id\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => {\n\t\t\treturn node.nodeName + ':::' + node.getAttribute( 'data-id' );\n\t\t} );\n\n\t\t// Text\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, textNodes, node => {\n\t\t\treturn node.nodeName + ':::' + node.innerText;\n\t\t} );\n\n\t\t// Media\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, mediaNodes, node => {\n\t\t\treturn node.nodeName + ':::' + ( node.getAttribute( 'src' ) || node.getAttribute( 'data-src' ) );\n\t\t} );\n\n\t\t// Code\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, codeNodes, node => {\n\t\t\treturn node.nodeName + ':::' + node.innerText;\n\t\t} );\n\n\t\tpairs.forEach( pair => {\n\t\t\t// Disable scale transformations on text nodes, we transition\n\t\t\t// each individual text property instead\n\t\t\tif( matches( pair.from, textNodes ) ) {\n\t\t\t\tpair.options = { scale: false };\n\t\t\t}\n\t\t\t// Animate individual lines of code\n\t\t\telse if( matches( pair.from, codeNodes ) ) {\n\n\t\t\t\t// Transition the code block's width and height instead of scaling\n\t\t\t\t// to prevent its content from being squished\n\t\t\t\tpair.options = { scale: false, styles: [ 'width', 'height' ] };\n\n\t\t\t\t// Lines of code\n\t\t\t\tthis.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-code', node => {\n\t\t\t\t\treturn node.textContent;\n\t\t\t\t}, {\n\t\t\t\t\tscale: false,\n\t\t\t\t\tstyles: [],\n\t\t\t\t\tmeasure: this.getLocalBoundingBox.bind( this )\n\t\t\t\t} );\n\n\t\t\t\t// Line numbers\n\t\t\t\tthis.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-numbers[data-line-number]', node => {\n\t\t\t\t\treturn node.getAttribute( 'data-line-number' );\n\t\t\t\t}, {\n\t\t\t\t\tscale: false,\n\t\t\t\t\tstyles: [ 'width' ],\n\t\t\t\t\tmeasure: this.getLocalBoundingBox.bind( this )\n\t\t\t\t} );\n\n\t\t\t}\n\n\t\t}, this );\n\n\t\treturn pairs;\n\n\t}\n\n\t/**\n\t * Helper method which returns a bounding box based on\n\t * the given elements offset coordinates.\n\t *\n\t * @param {HTMLElement} element\n\t * @return {Object} x, y, width, height\n\t */\n\tgetLocalBoundingBox( element ) {\n\n\t\tconst presentationScale = this.Reveal.getScale();\n\n\t\treturn {\n\t\t\tx: Math.round( ( element.offsetLeft * presentationScale ) * 100 ) / 100,\n\t\t\ty: Math.round( ( element.offsetTop * presentationScale ) * 100 ) / 100,\n\t\t\twidth: Math.round( ( element.offsetWidth * presentationScale ) * 100 ) / 100,\n\t\t\theight: Math.round( ( element.offsetHeight * presentationScale ) * 100 ) / 100\n\t\t};\n\n\t}\n\n\t/**\n\t * Finds matching elements between two slides.\n\t *\n\t * @param {Array} pairs \tList of pairs to push matches to\n\t * @param {HTMLElement} fromScope Scope within the from element exists\n\t * @param {HTMLElement} toScope Scope within the to element exists\n\t * @param {String} selector CSS selector of the element to match\n\t * @param {Function} serializer A function that accepts an element and returns\n\t * a stringified ID based on its contents\n\t * @param {Object} animationOptions Optional config options for this pair\n\t */\n\tfindAutoAnimateMatches( pairs, fromScope, toScope, selector, serializer, animationOptions ) {\n\n\t\tlet fromMatches = {};\n\t\tlet toMatches = {};\n\n\t\t[].slice.call( fromScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {\n\t\t\tconst key = serializer( element );\n\t\t\tif( typeof key === 'string' && key.length ) {\n\t\t\t\tfromMatches[key] = fromMatches[key] || [];\n\t\t\t\tfromMatches[key].push( element );\n\t\t\t}\n\t\t} );\n\n\t\t[].slice.call( toScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {\n\t\t\tconst key = serializer( element );\n\t\t\ttoMatches[key] = toMatches[key] || [];\n\t\t\ttoMatches[key].push( element );\n\n\t\t\tlet fromElement;\n\n\t\t\t// Retrieve the 'from' element\n\t\t\tif( fromMatches[key] ) {\n\t\t\t\tconst primaryIndex = toMatches[key].length - 1;\n\t\t\t\tconst secondaryIndex = fromMatches[key].length - 1;\n\n\t\t\t\t// If there are multiple identical from elements, retrieve\n\t\t\t\t// the one at the same index as our to-element.\n\t\t\t\tif( fromMatches[key][ primaryIndex ] ) {\n\t\t\t\t\tfromElement = fromMatches[key][ primaryIndex ];\n\t\t\t\t\tfromMatches[key][ primaryIndex ] = null;\n\t\t\t\t}\n\t\t\t\t// If there are no matching from-elements at the same index,\n\t\t\t\t// use the last one.\n\t\t\t\telse if( fromMatches[key][ secondaryIndex ] ) {\n\t\t\t\t\tfromElement = fromMatches[key][ secondaryIndex ];\n\t\t\t\t\tfromMatches[key][ secondaryIndex ] = null;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// If we've got a matching pair, push it to the list of pairs\n\t\t\tif( fromElement ) {\n\t\t\t\tpairs.push({\n\t\t\t\t\tfrom: fromElement,\n\t\t\t\t\tto: element,\n\t\t\t\t\toptions: animationOptions\n\t\t\t\t});\n\t\t\t}\n\t\t} );\n\n\t}\n\n\t/**\n\t * Returns a all elements within the given scope that should\n\t * be considered unmatched in an auto-animate transition. If\n\t * fading of unmatched elements is turned on, these elements\n\t * will fade when going between auto-animate slides.\n\t *\n\t * Note that parents of auto-animate targets are NOT considered\n\t * unmatched since fading them would break the auto-animation.\n\t *\n\t * @param {HTMLElement} rootElement\n\t * @return {Array}\n\t */\n\tgetUnmatchedAutoAnimateElements( rootElement ) {\n\n\t\treturn [].slice.call( rootElement.children ).reduce( ( result, element ) => {\n\n\t\t\tconst containsAnimatedElements = element.querySelector( '[data-auto-animate-target]' );\n\n\t\t\t// The element is unmatched if\n\t\t\t// - It is not an auto-animate target\n\t\t\t// - It does not contain any auto-animate targets\n\t\t\tif( !element.hasAttribute( 'data-auto-animate-target' ) && !containsAnimatedElements ) {\n\t\t\t\tresult.push( element );\n\t\t\t}\n\n\t\t\tif( element.querySelector( '[data-auto-animate-target]' ) ) {\n\t\t\t\tresult = result.concat( this.getUnmatchedAutoAnimateElements( element ) );\n\t\t\t}\n\n\t\t\treturn result;\n\n\t\t}, [] );\n\n\t}\n\n}\n","import { HORIZONTAL_SLIDES_SELECTOR, HORIZONTAL_BACKGROUNDS_SELECTOR } from '../utils/constants.js'\nimport { queryAll } from '../utils/util.js'\n\nconst HIDE_SCROLLBAR_TIMEOUT = 500;\nconst MAX_PROGRESS_SPACING = 4;\nconst MIN_PROGRESS_SEGMENT_HEIGHT = 6;\nconst MIN_PLAYHEAD_HEIGHT = 8;\n\n/**\n * The scroll view lets you read a reveal.js presentation\n * as a linear scrollable page.\n */\nexport default class ScrollView {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.active = false;\n\t\tthis.activatedCallbacks = [];\n\n\t\tthis.onScroll = this.onScroll.bind( this );\n\n\t}\n\n\t/**\n\t * Activates the scroll view. This rearranges the presentation DOM\n\t * by—among other things—wrapping each slide in a page element.\n\t */\n\tactivate() {\n\n\t\tif( this.active ) return;\n\n\t\tconst stateBeforeActivation = this.Reveal.getState();\n\n\t\tthis.active = true;\n\n\t\t// Store the full presentation HTML so that we can restore it\n\t\t// when/if the scroll view is deactivated\n\t\tthis.slideHTMLBeforeActivation = this.Reveal.getSlidesElement().innerHTML;\n\n\t\tconst horizontalSlides = queryAll( this.Reveal.getRevealElement(), HORIZONTAL_SLIDES_SELECTOR );\n\t\tconst horizontalBackgrounds = queryAll( this.Reveal.getRevealElement(), HORIZONTAL_BACKGROUNDS_SELECTOR );\n\n\t\tthis.viewportElement.classList.add( 'loading-scroll-mode', 'reveal-scroll' );\n\n\t\tlet presentationBackground;\n\n\t\tconst viewportStyles = window.getComputedStyle( this.viewportElement );\n\t\tif( viewportStyles && viewportStyles.background ) {\n\t\t\tpresentationBackground = viewportStyles.background;\n\t\t}\n\n\t\tconst pageElements = [];\n\t\tconst pageContainer = horizontalSlides[0].parentNode;\n\n\t\tlet previousSlide;\n\n\t\t// Creates a new page element and appends the given slide/bg\n\t\t// to it.\n\t\tconst createPageElement = ( slide, h, v, isVertical ) => {\n\n\t\t\tlet contentContainer;\n\n\t\t\t// If this slide is part of an auto-animation sequence, we\n\t\t\t// group it under the same page element as the previous slide\n\t\t\tif( previousSlide && this.Reveal.shouldAutoAnimateBetween( previousSlide, slide ) ) {\n\t\t\t\tcontentContainer = document.createElement( 'div' );\n\t\t\t\tcontentContainer.className = 'scroll-page-content scroll-auto-animate-page';\n\t\t\t\tcontentContainer.style.display = 'none';\n\t\t\t\tpreviousSlide.closest( '.scroll-page-content' ).parentNode.appendChild( contentContainer );\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// Wrap the slide in a page element and hide its overflow\n\t\t\t\t// so that no page ever flows onto another\n\t\t\t\tconst page = document.createElement( 'div' );\n\t\t\t\tpage.className = 'scroll-page';\n\t\t\t\tpageElements.push( page );\n\n\t\t\t\t// This transfers over the background of the vertical stack containing\n\t\t\t\t// the slide if it exists. Otherwise, it uses the presentation-wide\n\t\t\t\t// background.\n\t\t\t\tif( isVertical && horizontalBackgrounds.length > h ) {\n\t\t\t\t\tconst slideBackground = horizontalBackgrounds[h];\n\t\t\t\t\tconst pageBackground = window.getComputedStyle( slideBackground );\n\n\t\t\t\t\tif( pageBackground && pageBackground.background ) {\n\t\t\t\t\t\tpage.style.background = pageBackground.background;\n\t\t\t\t\t}\n\t\t\t\t\telse if( presentationBackground ) {\n\t\t\t\t\t\tpage.style.background = presentationBackground;\n\t\t\t\t\t}\n\t\t\t\t} else if( presentationBackground ) {\n\t\t\t\t\tpage.style.background = presentationBackground;\n\t\t\t\t}\n\n\t\t\t\tconst stickyContainer = document.createElement( 'div' );\n\t\t\t\tstickyContainer.className = 'scroll-page-sticky';\n\t\t\t\tpage.appendChild( stickyContainer );\n\n\t\t\t\tcontentContainer = document.createElement( 'div' );\n\t\t\t\tcontentContainer.className = 'scroll-page-content';\n\t\t\t\tstickyContainer.appendChild( contentContainer );\n\t\t\t}\n\n\t\t\tcontentContainer.appendChild( slide );\n\n\t\t\tslide.classList.remove( 'past', 'future' );\n\t\t\tslide.setAttribute( 'data-index-h', h );\n\t\t\tslide.setAttribute( 'data-index-v', v );\n\n\t\t\tif( slide.slideBackgroundElement ) {\n\t\t\t\tslide.slideBackgroundElement.remove( 'past', 'future' );\n\t\t\t\tcontentContainer.insertBefore( slide.slideBackgroundElement, slide );\n\t\t\t}\n\n\t\t\tpreviousSlide = slide;\n\n\t\t}\n\n\t\t// Slide and slide background layout\n\t\thorizontalSlides.forEach( ( horizontalSlide, h ) => {\n\n\t\t\tif( this.Reveal.isVerticalStack( horizontalSlide ) ) {\n\t\t\t\thorizontalSlide.querySelectorAll( 'section' ).forEach( ( verticalSlide, v ) => {\n\t\t\t\t\tcreatePageElement( verticalSlide, h, v, true );\n\t\t\t\t});\n\t\t\t}\n\t\t\telse {\n\t\t\t\tcreatePageElement( horizontalSlide, h, 0 );\n\t\t\t}\n\n\t\t}, this );\n\n\t\tthis.createProgressBar();\n\n\t\t// Remove leftover stacks\n\t\tqueryAll( this.Reveal.getRevealElement(), '.stack' ).forEach( stack => stack.remove() );\n\n\t\t// Add our newly created pages to the DOM\n\t\tpageElements.forEach( page => pageContainer.appendChild( page ) );\n\n\t\t// Re-run JS-based content layout after the slide is added to page DOM\n\t\tthis.Reveal.slideContent.layout( this.Reveal.getSlidesElement() );\n\n\t\tthis.Reveal.layout();\n\t\tthis.Reveal.setState( stateBeforeActivation );\n\n\t\tthis.activatedCallbacks.forEach( callback => callback() );\n\t\tthis.activatedCallbacks = [];\n\n\t\tthis.restoreScrollPosition();\n\n\t\tthis.viewportElement.classList.remove( 'loading-scroll-mode' );\n\t\tthis.viewportElement.addEventListener( 'scroll', this.onScroll, { passive: true } );\n\n\t}\n\n\t/**\n\t * Deactivates the scroll view and restores the standard slide-based\n\t * presentation.\n\t */\n\tdeactivate() {\n\n\t\tif( !this.active ) return;\n\n\t\tconst stateBeforeDeactivation = this.Reveal.getState();\n\n\t\tthis.active = false;\n\n\t\tthis.viewportElement.removeEventListener( 'scroll', this.onScroll );\n\t\tthis.viewportElement.classList.remove( 'reveal-scroll' );\n\n\t\tthis.removeProgressBar();\n\n\t\tthis.Reveal.getSlidesElement().innerHTML = this.slideHTMLBeforeActivation;\n\t\tthis.Reveal.sync();\n\t\tthis.Reveal.setState( stateBeforeDeactivation );\n\n\t\tthis.slideHTMLBeforeActivation = null;\n\n\t}\n\n\ttoggle( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? this.activate() : this.deactivate();\n\t\t}\n\t\telse {\n\t\t\tthis.isActive() ? this.deactivate() : this.activate();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if the scroll view is currently active.\n\t */\n\tisActive() {\n\n\t\treturn this.active;\n\n\t}\n\n\t/**\n\t * Renders the progress bar component.\n\t */\n\tcreateProgressBar() {\n\n\t\tthis.progressBar = document.createElement( 'div' );\n\t\tthis.progressBar.className = 'scrollbar';\n\n\t\tthis.progressBarInner = document.createElement( 'div' );\n\t\tthis.progressBarInner.className = 'scrollbar-inner';\n\t\tthis.progressBar.appendChild( this.progressBarInner );\n\n\t\tthis.progressBarPlayhead = document.createElement( 'div' );\n\t\tthis.progressBarPlayhead.className = 'scrollbar-playhead';\n\t\tthis.progressBarInner.appendChild( this.progressBarPlayhead );\n\n\t\tthis.viewportElement.insertBefore( this.progressBar, this.viewportElement.firstChild );\n\n\t\tconst handleDocumentMouseMove\t= ( event ) => {\n\n\t\t\tlet progress = ( event.clientY - this.progressBarInner.getBoundingClientRect().top ) / this.progressBarHeight;\n\t\t\tprogress = Math.max( Math.min( progress, 1 ), 0 );\n\n\t\t\tthis.viewportElement.scrollTop = progress * ( this.viewportElement.scrollHeight - this.viewportElement.offsetHeight );\n\n\t\t};\n\n\t\tconst handleDocumentMouseUp = ( event ) => {\n\n\t\t\tthis.draggingProgressBar = false;\n\t\t\tthis.showProgressBar();\n\n\t\t\tdocument.removeEventListener( 'mousemove', handleDocumentMouseMove );\n\t\t\tdocument.removeEventListener( 'mouseup', handleDocumentMouseUp );\n\n\t\t};\n\n\t\tconst handleMouseDown = ( event ) => {\n\n\t\t\tevent.preventDefault();\n\n\t\t\tthis.draggingProgressBar = true;\n\n\t\t\tdocument.addEventListener( 'mousemove', handleDocumentMouseMove );\n\t\t\tdocument.addEventListener( 'mouseup', handleDocumentMouseUp );\n\n\t\t\thandleDocumentMouseMove( event );\n\n\t\t};\n\n\t\tthis.progressBarInner.addEventListener( 'mousedown', handleMouseDown );\n\n\t}\n\n\tremoveProgressBar() {\n\n\t\tif( this.progressBar ) {\n\t\t\tthis.progressBar.remove();\n\t\t\tthis.progressBar = null;\n\t\t}\n\n\t}\n\n\tlayout() {\n\n\t\tif( this.isActive() ) {\n\t\t\tthis.syncPages();\n\t\t\tthis.syncScrollPosition();\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates our pages to match the latest configuration and\n\t * presentation size.\n\t */\n\tsyncPages() {\n\n\t\tconst config = this.Reveal.getConfig();\n\n\t\tconst slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );\n\t\tconst scale = this.Reveal.getScale();\n\t\tconst useCompactLayout = config.scrollLayout === 'compact';\n\n\t\tconst viewportHeight = this.viewportElement.offsetHeight;\n\t\tconst compactHeight = slideSize.height * scale;\n\t\tconst pageHeight = useCompactLayout ? compactHeight : viewportHeight;\n\n\t\t// The height that needs to be scrolled between scroll triggers\n\t\tthis.scrollTriggerHeight = useCompactLayout ? compactHeight : viewportHeight;\n\n\t\tthis.viewportElement.style.setProperty( '--page-height', pageHeight + 'px' );\n\t\tthis.viewportElement.style.scrollSnapType = typeof config.scrollSnap === 'string' ? `y ${config.scrollSnap}` : '';\n\n\t\t// This will hold all scroll triggers used to show/hide slides\n\t\tthis.slideTriggers = [];\n\n\t\tconst pageElements = Array.from( this.Reveal.getRevealElement().querySelectorAll( '.scroll-page' ) );\n\n\t\tthis.pages = pageElements.map( pageElement => {\n\t\t\tconst page = this.createPage({\n\t\t\t\tpageElement,\n\t\t\t\tslideElement: pageElement.querySelector( 'section' ),\n\t\t\t\tstickyElement: pageElement.querySelector( '.scroll-page-sticky' ),\n\t\t\t\tcontentElement: pageElement.querySelector( '.scroll-page-content' ),\n\t\t\t\tbackgroundElement: pageElement.querySelector( '.slide-background' ),\n\t\t\t\tautoAnimateElements: pageElement.querySelectorAll( '.scroll-auto-animate-page' ),\n\t\t\t\tautoAnimatePages: []\n\t\t\t});\n\n\t\t\tpage.pageElement.style.setProperty( '--slide-height', config.center === true ? 'auto' : slideSize.height + 'px' );\n\n\t\t\tthis.slideTriggers.push({\n\t\t\t\tpage: page,\n\t\t\t\tactivate: () => this.activatePage( page ),\n\t\t\t\tdeactivate: () => this.deactivatePage( page )\n\t\t\t});\n\n\t\t\t// Create scroll triggers that show/hide fragments\n\t\t\tthis.createFragmentTriggersForPage( page );\n\n\t\t\t// Create scroll triggers for triggering auto-animate steps\n\t\t\tif( page.autoAnimateElements.length > 0 ) {\n\t\t\t\tthis.createAutoAnimateTriggersForPage( page );\n\t\t\t}\n\n\t\t\tlet totalScrollTriggerCount = Math.max( page.scrollTriggers.length - 1, 0 );\n\n\t\t\t// Each auto-animate step may include its own scroll triggers\n\t\t\t// for fragments, ensure we count those as well\n\t\t\ttotalScrollTriggerCount += page.autoAnimatePages.reduce( ( total, page ) => {\n\t\t\t\treturn total + Math.max( page.scrollTriggers.length - 1, 0 );\n\t\t\t}, page.autoAnimatePages.length );\n\n\t\t\t// Clean up from previous renders\n\t\t\tpage.pageElement.querySelectorAll( '.scroll-snap-point' ).forEach( el => el.remove() );\n\n\t\t\t// Create snap points for all scroll triggers\n\t\t\t// - Can't be absolute in FF\n\t\t\t// - Can't be 0-height in Safari\n\t\t\t// - Can't use snap-align on parent in Safari because then\n\t\t\t// inner triggers won't work\n\t\t\tfor( let i = 0; i < totalScrollTriggerCount + 1; i++ ) {\n\t\t\t\tconst triggerStick = document.createElement( 'div' );\n\t\t\t\ttriggerStick.className = 'scroll-snap-point';\n\t\t\t\ttriggerStick.style.height = this.scrollTriggerHeight + 'px';\n\t\t\t\ttriggerStick.style.scrollSnapAlign = useCompactLayout ? 'center' : 'start';\n\t\t\t\tpage.pageElement.appendChild( triggerStick );\n\n\t\t\t\tif( i === 0 ) {\n\t\t\t\t\ttriggerStick.style.marginTop = -this.scrollTriggerHeight + 'px';\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// In the compact layout, only slides with scroll triggers cover the\n\t\t\t// full viewport height. This helps avoid empty gaps before or after\n\t\t\t// a sticky slide.\n\t\t\tif( useCompactLayout && page.scrollTriggers.length > 0 ) {\n\t\t\t\tpage.pageHeight = viewportHeight;\n\t\t\t\tpage.pageElement.style.setProperty( '--page-height', viewportHeight + 'px' );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tpage.pageHeight = pageHeight;\n\t\t\t\tpage.pageElement.style.removeProperty( '--page-height' );\n\t\t\t}\n\n\t\t\t// Add scroll padding based on how many scroll triggers we have\n\t\t\tpage.scrollPadding = this.scrollTriggerHeight * totalScrollTriggerCount;\n\n\t\t\t// The total height including scrollable space\n\t\t\tpage.totalHeight = page.pageHeight + page.scrollPadding;\n\n\t\t\t// This is used to pad the height of our page in CSS\n\t\t\tpage.pageElement.style.setProperty( '--page-scroll-padding', page.scrollPadding + 'px' );\n\n\t\t\t// If this is a sticky page, stick it to the vertical center\n\t\t\tif( totalScrollTriggerCount > 0 ) {\n\t\t\t\tpage.stickyElement.style.position = 'sticky';\n\t\t\t\tpage.stickyElement.style.top = Math.max( ( viewportHeight - page.pageHeight ) / 2, 0 ) + 'px';\n\t\t\t}\n\t\t\telse {\n\t\t\t\tpage.stickyElement.style.position = 'relative';\n\t\t\t\tpage.pageElement.style.scrollSnapAlign = page.pageHeight < viewportHeight ? 'center' : 'start';\n\t\t\t}\n\n\t\t\treturn page;\n\t\t} );\n\n\t\tthis.setTriggerRanges();\n\n\t\t/*\n\t\tconsole.log(this.slideTriggers.map( t => {\n\t\t\treturn {\n\t\t\t\trange: `${t.range[0].toFixed(2)}-${t.range[1].toFixed(2)}`,\n\t\t\t\ttriggers: t.page.scrollTriggers.map( t => {\n\t\t\t\t\treturn `${t.range[0].toFixed(2)}-${t.range[1].toFixed(2)}`\n\t\t\t\t}).join( ', ' ),\n\t\t\t}\n\t\t}))\n\t\t*/\n\n\t\tthis.viewportElement.setAttribute( 'data-scrollbar', config.scrollProgress );\n\n\t\tif( config.scrollProgress && this.totalScrollTriggerCount > 1 ) {\n\t\t\t// Create the progress bar if it doesn't already exist\n\t\t\tif( !this.progressBar ) this.createProgressBar();\n\n\t\t\tthis.syncProgressBar();\n\t\t}\n\t\telse {\n\t\t\tthis.removeProgressBar();\n\t\t}\n\n\t}\n\n\t/**\n\t * Calculates and sets the scroll range for all of our scroll\n\t * triggers.\n\t */\n\tsetTriggerRanges() {\n\n\t\t// Calculate the total number of scroll triggers\n\t\tthis.totalScrollTriggerCount = this.slideTriggers.reduce( ( total, trigger ) => {\n\t\t\treturn total + Math.max( trigger.page.scrollTriggers.length, 1 );\n\t\t}, 0 );\n\n\t\tlet rangeStart = 0;\n\n\t\t// Calculate the scroll range of each scroll trigger on a scale\n\t\t// of 0-1\n\t\tthis.slideTriggers.forEach( ( trigger, i ) => {\n\t\t\ttrigger.range = [\n\t\t\t\trangeStart,\n\t\t\t\trangeStart + Math.max( trigger.page.scrollTriggers.length, 1 ) / this.totalScrollTriggerCount\n\t\t\t];\n\n\t\t\tconst scrollTriggerSegmentSize = ( trigger.range[1] - trigger.range[0] ) / trigger.page.scrollTriggers.length;\n\t\t\t// Set the range for each inner scroll trigger\n\t\t\ttrigger.page.scrollTriggers.forEach( ( scrollTrigger, i ) => {\n\t\t\t\tscrollTrigger.range = [\n\t\t\t\t\trangeStart + i * scrollTriggerSegmentSize,\n\t\t\t\t\trangeStart + ( i + 1 ) * scrollTriggerSegmentSize\n\t\t\t\t];\n\t\t\t} );\n\n\t\t\trangeStart = trigger.range[1];\n\t\t} );\n\n\t}\n\n\t/**\n\t * Creates one scroll trigger for each fragments in the given page.\n\t *\n\t * @param {*} page\n\t */\n\tcreateFragmentTriggersForPage( page, slideElement ) {\n\n\t\tslideElement = slideElement || page.slideElement;\n\n\t\t// Each fragment 'group' is an array containing one or more\n\t\t// fragments. Multiple fragments that appear at the same time\n\t\t// are part of the same group.\n\t\tconst fragmentGroups = this.Reveal.fragments.sort( slideElement.querySelectorAll( '.fragment' ), true );\n\n\t\t// Create scroll triggers that show/hide fragments\n\t\tif( fragmentGroups.length ) {\n\t\t\tpage.fragments = this.Reveal.fragments.sort( slideElement.querySelectorAll( '.fragment:not(.disabled)' ) );\n\t\t\tpage.scrollTriggers.push(\n\t\t\t\t// Trigger for the initial state with no fragments visible\n\t\t\t\t{\n\t\t\t\t\tactivate: () => {\n\t\t\t\t\t\tthis.Reveal.fragments.update( -1, page.fragments, slideElement );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t);\n\n\t\t\t// Triggers for each fragment group\n\t\t\tfragmentGroups.forEach( ( fragments, i ) => {\n\t\t\t\tpage.scrollTriggers.push({\n\t\t\t\t\tactivate: () => {\n\t\t\t\t\t\tthis.Reveal.fragments.update( i, page.fragments, slideElement );\n\t\t\t\t\t}\n\t\t\t\t});\n\t\t\t} );\n\t\t}\n\n\n\t\treturn page.scrollTriggers.length;\n\n\t}\n\n\t/**\n\t * Creates scroll triggers for the auto-animate steps in the\n\t * given page.\n\t *\n\t * @param {*} page\n\t */\n\tcreateAutoAnimateTriggersForPage( page ) {\n\n\t\tif( page.autoAnimateElements.length > 0 ) {\n\n\t\t\t// Triggers for each subsequent auto-animate slide\n\t\t\tthis.slideTriggers.push( ...Array.from( page.autoAnimateElements ).map( ( autoAnimateElement, i ) => {\n\t\t\t\tlet autoAnimatePage = this.createPage({\n\t\t\t\t\tslideElement: autoAnimateElement.querySelector( 'section' ),\n\t\t\t\t\tcontentElement: autoAnimateElement,\n\t\t\t\t\tbackgroundElement: autoAnimateElement.querySelector( '.slide-background' )\n\t\t\t\t});\n\n\t\t\t\t// Create fragment scroll triggers for the auto-animate slide\n\t\t\t\tthis.createFragmentTriggersForPage( autoAnimatePage, autoAnimatePage.slideElement );\n\n\t\t\t\tpage.autoAnimatePages.push( autoAnimatePage );\n\n\t\t\t\t// Return our slide trigger\n\t\t\t\treturn {\n\t\t\t\t\tpage: autoAnimatePage,\n\t\t\t\t\tactivate: () => this.activatePage( autoAnimatePage ),\n\t\t\t\t\tdeactivate: () => this.deactivatePage( autoAnimatePage )\n\t\t\t\t};\n\t\t\t}));\n\t\t}\n\n\t}\n\n\t/**\n\t * Helper method for creating a page definition and adding\n\t * required fields. A \"page\" is a slide or auto-animate step.\n\t */\n\tcreatePage( page ) {\n\n\t\tpage.scrollTriggers = [];\n\t\tpage.indexh = parseInt( page.slideElement.getAttribute( 'data-index-h' ), 10 );\n\t\tpage.indexv = parseInt( page.slideElement.getAttribute( 'data-index-v' ), 10 );\n\n\t\treturn page;\n\n\t}\n\n\t/**\n\t * Rerenders progress bar segments so that they match the current\n\t * reveal.js config and size.\n\t */\n\tsyncProgressBar() {\n\n\t\tthis.progressBarInner.querySelectorAll( '.scrollbar-slide' ).forEach( slide => slide.remove() );\n\n\t\tconst scrollHeight = this.viewportElement.scrollHeight;\n\t\tconst viewportHeight = this.viewportElement.offsetHeight;\n\t\tconst viewportHeightFactor = viewportHeight / scrollHeight;\n\n\t\tthis.progressBarHeight = this.progressBarInner.offsetHeight;\n\t\tthis.playheadHeight = Math.max( viewportHeightFactor * this.progressBarHeight, MIN_PLAYHEAD_HEIGHT );\n\t\tthis.progressBarScrollableHeight = this.progressBarHeight - this.playheadHeight;\n\n\t\tconst progressSegmentHeight = viewportHeight / scrollHeight * this.progressBarHeight;\n\t\tconst spacing = Math.min( progressSegmentHeight / 8, MAX_PROGRESS_SPACING );\n\n\t\tthis.progressBarPlayhead.style.height = this.playheadHeight - spacing + 'px';\n\n\t\t// Don't show individual segments if they're too small\n\t\tif( progressSegmentHeight > MIN_PROGRESS_SEGMENT_HEIGHT ) {\n\n\t\t\tthis.slideTriggers.forEach( slideTrigger => {\n\n\t\t\t\tconst { page } = slideTrigger;\n\n\t\t\t\t// Visual representation of a slide\n\t\t\t\tpage.progressBarSlide = document.createElement( 'div' );\n\t\t\t\tpage.progressBarSlide.className = 'scrollbar-slide';\n\t\t\t\tpage.progressBarSlide.style.top = slideTrigger.range[0] * this.progressBarHeight + 'px';\n\t\t\t\tpage.progressBarSlide.style.height = ( slideTrigger.range[1] - slideTrigger.range[0] ) * this.progressBarHeight - spacing + 'px';\n\t\t\t\tpage.progressBarSlide.classList.toggle( 'has-triggers', page.scrollTriggers.length > 0 );\n\t\t\t\tthis.progressBarInner.appendChild( page.progressBarSlide );\n\n\t\t\t\t// Visual representations of each scroll trigger\n\t\t\t\tpage.scrollTriggerElements = page.scrollTriggers.map( ( trigger, i ) => {\n\n\t\t\t\t\tconst triggerElement = document.createElement( 'div' );\n\t\t\t\t\ttriggerElement.className = 'scrollbar-trigger';\n\t\t\t\t\ttriggerElement.style.top = ( trigger.range[0] - slideTrigger.range[0] ) * this.progressBarHeight + 'px';\n\t\t\t\t\ttriggerElement.style.height = ( trigger.range[1] - trigger.range[0] ) * this.progressBarHeight - spacing + 'px';\n\t\t\t\t\tpage.progressBarSlide.appendChild( triggerElement );\n\n\t\t\t\t\tif( i === 0 ) triggerElement.style.display = 'none';\n\n\t\t\t\t\treturn triggerElement;\n\n\t\t\t\t} );\n\n\t\t\t} );\n\n\t\t}\n\t\telse {\n\n\t\t\tthis.pages.forEach( page => page.progressBarSlide = null );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Reads the current scroll position and updates our active\n\t * trigger states accordingly.\n\t */\n\tsyncScrollPosition() {\n\n\t\tconst viewportHeight = this.viewportElement.offsetHeight;\n\t\tconst viewportHeightFactor = viewportHeight / this.viewportElement.scrollHeight;\n\n\t\tconst scrollTop = this.viewportElement.scrollTop;\n\t\tconst scrollHeight = this.viewportElement.scrollHeight - viewportHeight\n\t\tconst scrollProgress = Math.max( Math.min( scrollTop / scrollHeight, 1 ), 0 );\n\t\tconst scrollProgressMid = Math.max( Math.min( ( scrollTop + viewportHeight / 2 ) / this.viewportElement.scrollHeight, 1 ), 0 );\n\n\t\tlet activePage;\n\n\t\tthis.slideTriggers.forEach( ( trigger ) => {\n\t\t\tconst { page } = trigger;\n\n\t\t\tconst shouldPreload = scrollProgress >= trigger.range[0] - viewportHeightFactor*2 &&\n\t\t\t\t\t\t\t\t\t\t\t\t\t\tscrollProgress <= trigger.range[1] + viewportHeightFactor*2;\n\n\t\t\t// Load slides that are within the preload range\n\t\t\tif( shouldPreload && !page.loaded ) {\n\t\t\t\tpage.loaded = true;\n\t\t\t\tthis.Reveal.slideContent.load( page.slideElement );\n\t\t\t}\n\t\t\telse if( page.loaded ) {\n\t\t\t\tpage.loaded = false;\n\t\t\t\tthis.Reveal.slideContent.unload( page.slideElement );\n\t\t\t}\n\n\t\t\t// If we're within this trigger range, activate it\n\t\t\tif( scrollProgress >= trigger.range[0] && scrollProgress <= trigger.range[1] ) {\n\t\t\t\tthis.activateTrigger( trigger );\n\t\t\t\tactivePage = trigger.page;\n\t\t\t}\n\t\t\t// .. otherwise deactivate\n\t\t\telse if( trigger.active ) {\n\t\t\t\tthis.deactivateTrigger( trigger );\n\t\t\t}\n\t\t} );\n\n\t\t// Each page can have its own scroll triggers, check if any of those\n\t\t// need to be activated/deactivated\n\t\tif( activePage ) {\n\t\t\tactivePage.scrollTriggers.forEach( ( trigger ) => {\n\t\t\t\tif( scrollProgressMid >= trigger.range[0] && scrollProgressMid <= trigger.range[1] ) {\n\t\t\t\t\tthis.activateTrigger( trigger );\n\t\t\t\t}\n\t\t\t\telse if( trigger.active ) {\n\t\t\t\t\tthis.deactivateTrigger( trigger );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\n\t\t// Update our visual progress indication\n\t\tthis.setProgressBarValue( scrollTop / ( this.viewportElement.scrollHeight - viewportHeight ) );\n\n\t}\n\n\t/**\n\t * Moves the progress bar playhead to the specified position.\n\t *\n\t * @param {number} progress 0-1\n\t */\n\tsetProgressBarValue( progress ) {\n\n\t\tif( this.progressBar ) {\n\n\t\t\tthis.progressBarPlayhead.style.transform = `translateY(${progress * this.progressBarScrollableHeight}px)`;\n\n\t\t\tthis.getAllPages()\n\t\t\t\t.filter( page => page.progressBarSlide )\n\t\t\t\t.forEach( ( page ) => {\n\t\t\t\t\tpage.progressBarSlide.classList.toggle( 'active', page.active === true );\n\n\t\t\t\t\tpage.scrollTriggers.forEach( ( trigger, i ) => {\n\t\t\t\t\t\tpage.scrollTriggerElements[i].classList.toggle( 'active', page.active === true && trigger.active === true );\n\t\t\t\t\t} );\n\t\t\t\t} );\n\n\t\t\tthis.showProgressBar();\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Show the progress bar and, if configured, automatically hide\n\t * it after a delay.\n\t */\n\tshowProgressBar() {\n\n\t\tthis.progressBar.classList.add( 'visible' );\n\n\t\tclearTimeout( this.hideProgressBarTimeout );\n\n\t\tif( this.Reveal.getConfig().scrollProgress === 'auto' && !this.draggingProgressBar ) {\n\n\t\t\tthis.hideProgressBarTimeout = setTimeout( () => {\n\t\t\t\tif( this.progressBar ) {\n\t\t\t\t\tthis.progressBar.classList.remove( 'visible' );\n\t\t\t\t}\n\t\t\t}, HIDE_SCROLLBAR_TIMEOUT );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Scroll to the previous page.\n\t */\n\tprev() {\n\n\t\tthis.viewportElement.scrollTop -= this.scrollTriggerHeight;\n\n\t}\n\n\t/**\n\t * Scroll to the next page.\n\t */\n\tnext() {\n\n\t\tthis.viewportElement.scrollTop += this.scrollTriggerHeight;\n\n\t}\n\n\t/**\n\t * Scrolls the given slide element into view.\n\t *\n\t * @param {HTMLElement} slideElement\n\t */\n\tscrollToSlide( slideElement ) {\n\n\t\t// If the scroll view isn't active yet, queue this action\n\t\tif( !this.active ) {\n\t\t\tthis.activatedCallbacks.push( () => this.scrollToSlide( slideElement ) );\n\t\t}\n\t\telse {\n\t\t\t// Find the trigger for this slide\n\t\t\tconst trigger = this.getScrollTriggerBySlide( slideElement );\n\n\t\t\tif( trigger ) {\n\t\t\t\t// Use the trigger's range to calculate the scroll position\n\t\t\t\tthis.viewportElement.scrollTop = trigger.range[0] * ( this.viewportElement.scrollHeight - this.viewportElement.offsetHeight );\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Persists the current scroll position to session storage\n\t * so that it can be restored.\n\t */\n\tstoreScrollPosition() {\n\n\t\tclearTimeout( this.storeScrollPositionTimeout );\n\n\t\tthis.storeScrollPositionTimeout = setTimeout( () => {\n\t\t\tsessionStorage.setItem( 'reveal-scroll-top', this.viewportElement.scrollTop );\n\t\t\tsessionStorage.setItem( 'reveal-scroll-origin', location.origin + location.pathname );\n\n\t\t\tthis.storeScrollPositionTimeout = null;\n\t\t}, 50 );\n\n\t}\n\n\t/**\n\t * Restores the scroll position when a deck is reloader.\n\t */\n\trestoreScrollPosition() {\n\n\t\tconst scrollPosition = sessionStorage.getItem( 'reveal-scroll-top' );\n\t\tconst scrollOrigin = sessionStorage.getItem( 'reveal-scroll-origin' );\n\n\t\tif( scrollPosition && scrollOrigin === location.origin + location.pathname ) {\n\t\t\tthis.viewportElement.scrollTop = parseInt( scrollPosition, 10 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Activates the given page and starts its embedded content\n\t * if there is any.\n\t *\n\t * @param {object} page\n\t */\n\tactivatePage( page ) {\n\n\t\tif( !page.active ) {\n\n\t\t\tpage.active = true;\n\n\t\t\tconst { slideElement, backgroundElement, contentElement, indexh, indexv } = page;\n\n\t\t\tcontentElement.style.display = 'block';\n\n\t\t\tslideElement.classList.add( 'present' );\n\n\t\t\tif( backgroundElement ) {\n\t\t\t\tbackgroundElement.classList.add( 'present' );\n\t\t\t}\n\n\t\t\tthis.Reveal.setCurrentScrollPage( slideElement, indexh, indexv );\n\t\t\tthis.Reveal.backgrounds.bubbleSlideContrastClassToElement( slideElement, this.viewportElement );\n\n\t\t\t// If this page is part of an auto-animation there will be one\n\t\t\t// content element per auto-animated page. We need to show the\n\t\t\t// current page and hide all others.\n\t\t\tArray.from( contentElement.parentNode.querySelectorAll( '.scroll-page-content' ) ).forEach( sibling => {\n\t\t\t\tif( sibling !== contentElement ) {\n\t\t\t\t\tsibling.style.display = 'none';\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Deactivates the page after it has been visible.\n\t *\n\t * @param {object} page\n\t */\n\tdeactivatePage( page ) {\n\n\t\tif( page.active ) {\n\n\t\t\tpage.active = false;\n\t\t\tif( page.slideElement ) page.slideElement.classList.remove( 'present' );\n\t\t\tif( page.backgroundElement ) page.backgroundElement.classList.remove( 'present' );\n\n\t\t}\n\n\t}\n\n\tactivateTrigger( trigger ) {\n\n\t\tif( !trigger.active ) {\n\t\t\ttrigger.active = true;\n\t\t\ttrigger.activate();\n\t\t}\n\n\t}\n\n\tdeactivateTrigger( trigger ) {\n\n\t\tif( trigger.active ) {\n\t\t\ttrigger.active = false;\n\n\t\t\tif( trigger.deactivate ) {\n\t\t\t\ttrigger.deactivate();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Retrieve a slide by its original h/v index (i.e. the indices the\n\t * slide had before being linearized).\n\t *\n\t * @param {number} h\n\t * @param {number} v\n\t * @returns {HTMLElement}\n\t */\n\tgetSlideByIndices( h, v ) {\n\n\t\tconst page = this.getAllPages().find( page => {\n\t\t\treturn page.indexh === h && page.indexv === v;\n\t\t} );\n\n\t\treturn page ? page.slideElement : null;\n\n\t}\n\n\t/**\n\t * Retrieve a list of all scroll triggers for the given slide\n\t * DOM element.\n\t *\n\t * @param {HTMLElement} slide\n\t * @returns {Array}\n\t */\n\tgetScrollTriggerBySlide( slide ) {\n\n\t\treturn this.slideTriggers.find( trigger => trigger.page.slideElement === slide );\n\n\t}\n\n\t/**\n\t * Get a list of all pages in the scroll view. This includes\n\t * both top-level slides and auto-animate steps.\n\t *\n\t * @returns {Array}\n\t */\n\tgetAllPages() {\n\n\t\treturn this.pages.flatMap( page => [page, ...(page.autoAnimatePages || [])] );\n\n\t}\n\n\tonScroll() {\n\n\t\tthis.syncScrollPosition();\n\t\tthis.storeScrollPosition();\n\n\t}\n\n\tget viewportElement() {\n\n\t\treturn this.Reveal.getViewportElement();\n\n\t}\n\n}\n","import { SLIDES_SELECTOR } from '../utils/constants.js'\nimport { queryAll, createStyleSheet } from '../utils/util.js'\n\n/**\n * Setups up our presentation for printing/exporting to PDF.\n */\nexport default class PrintView {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\t/**\n\t * Configures the presentation for printing to a static\n\t * PDF.\n\t */\n\tasync activate() {\n\n\t\tconst config = this.Reveal.getConfig();\n\t\tconst slides = queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR )\n\n\t\t// Compute slide numbers now, before we start duplicating slides\n\t\tconst injectPageNumbers = config.slideNumber && /all|print/i.test( config.showSlideNumber );\n\n\t\tconst slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );\n\n\t\t// Dimensions of the PDF pages\n\t\tconst pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),\n\t\t\tpageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) );\n\n\t\t// Dimensions of slides within the pages\n\t\tconst slideWidth = slideSize.width,\n\t\t\tslideHeight = slideSize.height;\n\n\t\tawait new Promise( requestAnimationFrame );\n\n\t\t// Let the browser know what page size we want to print\n\t\tcreateStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );\n\n\t\t// Limit the size of certain elements to the dimensions of the slide\n\t\tcreateStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );\n\n\t\tdocument.documentElement.classList.add( 'reveal-print', 'print-pdf' );\n\t\tdocument.body.style.width = pageWidth + 'px';\n\t\tdocument.body.style.height = pageHeight + 'px';\n\n\t\tconst viewportElement = this.Reveal.getViewportElement();\n\t\tlet presentationBackground;\n\t\tif( viewportElement ) {\n\t\t\tconst viewportStyles = window.getComputedStyle( viewportElement );\n\t\t\tif( viewportStyles && viewportStyles.background ) {\n\t\t\t\tpresentationBackground = viewportStyles.background;\n\t\t\t}\n\t\t}\n\n\t\t// Make sure stretch elements fit on slide\n\t\tawait new Promise( requestAnimationFrame );\n\t\tthis.Reveal.layoutSlideContents( slideWidth, slideHeight );\n\n\t\t// Batch scrollHeight access to prevent layout thrashing\n\t\tawait new Promise( requestAnimationFrame );\n\n\t\tconst slideScrollHeights = slides.map( slide => slide.scrollHeight );\n\n\t\tconst pages = [];\n\t\tconst pageContainer = slides[0].parentNode;\n\t\tlet slideNumber = 1;\n\n\t\t// Slide and slide background layout\n\t\tslides.forEach( function( slide, index ) {\n\n\t\t\t// Vertical stacks are not centred since their section\n\t\t\t// children will be\n\t\t\tif( slide.classList.contains( 'stack' ) === false ) {\n\t\t\t\t// Center the slide inside of the page, giving the slide some margin\n\t\t\t\tlet left = ( pageWidth - slideWidth ) / 2;\n\t\t\t\tlet top = ( pageHeight - slideHeight ) / 2;\n\n\t\t\t\tconst contentHeight = slideScrollHeights[ index ];\n\t\t\t\tlet numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );\n\n\t\t\t\t// Adhere to configured pages per slide limit\n\t\t\t\tnumberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );\n\n\t\t\t\t// Center slides vertically\n\t\t\t\tif( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {\n\t\t\t\t\ttop = Math.max( ( pageHeight - contentHeight ) / 2, 0 );\n\t\t\t\t}\n\n\t\t\t\t// Wrap the slide in a page element and hide its overflow\n\t\t\t\t// so that no page ever flows onto another\n\t\t\t\tconst page = document.createElement( 'div' );\n\t\t\t\tpages.push( page );\n\n\t\t\t\tpage.className = 'pdf-page';\n\t\t\t\tpage.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';\n\n\t\t\t\t// Copy the presentation-wide background to each individual\n\t\t\t\t// page when printing\n\t\t\t\tif( presentationBackground ) {\n\t\t\t\t\tpage.style.background = presentationBackground;\n\t\t\t\t}\n\n\t\t\t\tpage.appendChild( slide );\n\n\t\t\t\t// Position the slide inside of the page\n\t\t\t\tslide.style.left = left + 'px';\n\t\t\t\tslide.style.top = top + 'px';\n\t\t\t\tslide.style.width = slideWidth + 'px';\n\n\t\t\t\tthis.Reveal.slideContent.layout( slide );\n\n\t\t\t\tif( slide.slideBackgroundElement ) {\n\t\t\t\t\tpage.insertBefore( slide.slideBackgroundElement, slide );\n\t\t\t\t}\n\n\t\t\t\t// Inject notes if `showNotes` is enabled\n\t\t\t\tif( config.showNotes ) {\n\n\t\t\t\t\t// Are there notes for this slide?\n\t\t\t\t\tconst notes = this.Reveal.getSlideNotes( slide );\n\t\t\t\t\tif( notes ) {\n\n\t\t\t\t\t\tconst notesSpacing = 8;\n\t\t\t\t\t\tconst notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';\n\t\t\t\t\t\tconst notesElement = document.createElement( 'div' );\n\t\t\t\t\t\tnotesElement.classList.add( 'speaker-notes' );\n\t\t\t\t\t\tnotesElement.classList.add( 'speaker-notes-pdf' );\n\t\t\t\t\t\tnotesElement.setAttribute( 'data-layout', notesLayout );\n\t\t\t\t\t\tnotesElement.innerHTML = notes;\n\n\t\t\t\t\t\tif( notesLayout === 'separate-page' ) {\n\t\t\t\t\t\t\tpages.push( notesElement );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tnotesElement.style.left = notesSpacing + 'px';\n\t\t\t\t\t\t\tnotesElement.style.bottom = notesSpacing + 'px';\n\t\t\t\t\t\t\tnotesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';\n\t\t\t\t\t\t\tpage.appendChild( notesElement );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t// Inject page numbers if `slideNumbers` are enabled\n\t\t\t\tif( injectPageNumbers ) {\n\t\t\t\t\tconst numberElement = document.createElement( 'div' );\n\t\t\t\t\tnumberElement.classList.add( 'slide-number' );\n\t\t\t\t\tnumberElement.classList.add( 'slide-number-pdf' );\n\t\t\t\t\tnumberElement.innerHTML = slideNumber++;\n\t\t\t\t\tpage.appendChild( numberElement );\n\t\t\t\t}\n\n\t\t\t\t// Copy page and show fragments one after another\n\t\t\t\tif( config.pdfSeparateFragments ) {\n\n\t\t\t\t\t// Each fragment 'group' is an array containing one or more\n\t\t\t\t\t// fragments. Multiple fragments that appear at the same time\n\t\t\t\t\t// are part of the same group.\n\t\t\t\t\tconst fragmentGroups = this.Reveal.fragments.sort( page.querySelectorAll( '.fragment' ), true );\n\n\t\t\t\t\tlet previousFragmentStep;\n\n\t\t\t\t\tfragmentGroups.forEach( function( fragments, index ) {\n\n\t\t\t\t\t\t// Remove 'current-fragment' from the previous group\n\t\t\t\t\t\tif( previousFragmentStep ) {\n\t\t\t\t\t\t\tpreviousFragmentStep.forEach( function( fragment ) {\n\t\t\t\t\t\t\t\tfragment.classList.remove( 'current-fragment' );\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// Show the fragments for the current index\n\t\t\t\t\t\tfragments.forEach( function( fragment ) {\n\t\t\t\t\t\t\tfragment.classList.add( 'visible', 'current-fragment' );\n\t\t\t\t\t\t}, this );\n\n\t\t\t\t\t\t// Create a separate page for the current fragment state\n\t\t\t\t\t\tconst clonedPage = page.cloneNode( true );\n\n\t\t\t\t\t\t// Inject unique page numbers for fragments\n\t\t\t\t\t\tif( injectPageNumbers ) {\n\t\t\t\t\t\t\tconst numberElement = clonedPage.querySelector( '.slide-number-pdf' );\n\t\t\t\t\t\t\tconst fragmentNumber = index + 1;\n\t\t\t\t\t\t\tnumberElement.innerHTML += '.' + fragmentNumber;\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tpages.push( clonedPage );\n\n\t\t\t\t\t\tpreviousFragmentStep = fragments;\n\n\t\t\t\t\t}, this );\n\n\t\t\t\t\t// Reset the first/original page so that all fragments are hidden\n\t\t\t\t\tfragmentGroups.forEach( function( fragments ) {\n\t\t\t\t\t\tfragments.forEach( function( fragment ) {\n\t\t\t\t\t\t\tfragment.classList.remove( 'visible', 'current-fragment' );\n\t\t\t\t\t\t} );\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\t\t\t\t// Show all fragments\n\t\t\t\telse {\n\t\t\t\t\tqueryAll( page, '.fragment:not(.fade-out)' ).forEach( function( fragment ) {\n\t\t\t\t\t\tfragment.classList.add( 'visible' );\n\t\t\t\t\t} );\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}, this );\n\n\t\tawait new Promise( requestAnimationFrame );\n\n\t\tpages.forEach( page => pageContainer.appendChild( page ) );\n\n\t\t// Re-run JS-based content layout after the slide is added to page DOM\n\t\tthis.Reveal.slideContent.layout( this.Reveal.getSlidesElement() );\n\n\t\t// Notify subscribers that the PDF layout is good to go\n\t\tthis.Reveal.dispatchEvent({ type: 'pdf-ready' });\n\n\t\tviewportElement.classList.remove( 'loading-scroll-mode' );\n\n\t}\n\n\t/**\n\t * Checks if the print mode is/should be activated.\n\t */\n\tisActive() {\n\n\t\treturn this.Reveal.getConfig().view === 'print';\n\n\t}\n\n}","import { extend, queryAll } from '../utils/util.js'\n\n/**\n * Handles sorting and navigation of slide fragments.\n * Fragments are elements within a slide that are\n * revealed/animated incrementally.\n */\nexport default class Fragments {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.fragments === false ) {\n\t\t\tthis.disable();\n\t\t}\n\t\telse if( oldConfig.fragments === false ) {\n\t\t\tthis.enable();\n\t\t}\n\n\t}\n\n\t/**\n\t * If fragments are disabled in the deck, they should all be\n\t * visible rather than stepped through.\n\t */\n\tdisable() {\n\n\t\tqueryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => {\n\t\t\telement.classList.add( 'visible' );\n\t\t\telement.classList.remove( 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Reverse of #disable(). Only called if fragments have\n\t * previously been disabled.\n\t */\n\tenable() {\n\n\t\tqueryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => {\n\t\t\telement.classList.remove( 'visible' );\n\t\t\telement.classList.remove( 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Returns an object describing the available fragment\n\t * directions.\n\t *\n\t * @return {{prev: boolean, next: boolean}}\n\t */\n\tavailableRoutes() {\n\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tif( currentSlide && this.Reveal.getConfig().fragments ) {\n\t\t\tlet fragments = currentSlide.querySelectorAll( '.fragment:not(.disabled)' );\n\t\t\tlet hiddenFragments = currentSlide.querySelectorAll( '.fragment:not(.disabled):not(.visible)' );\n\n\t\t\treturn {\n\t\t\t\tprev: fragments.length - hiddenFragments.length > 0,\n\t\t\t\tnext: !!hiddenFragments.length\n\t\t\t};\n\t\t}\n\t\telse {\n\t\t\treturn { prev: false, next: false };\n\t\t}\n\n\t}\n\n\t/**\n\t * Return a sorted fragments list, ordered by an increasing\n\t * \"data-fragment-index\" attribute.\n\t *\n\t * Fragments will be revealed in the order that they are returned by\n\t * this function, so you can use the index attributes to control the\n\t * order of fragment appearance.\n\t *\n\t * To maintain a sensible default fragment order, fragments are presumed\n\t * to be passed in document order. This function adds a \"fragment-index\"\n\t * attribute to each node if such an attribute is not already present,\n\t * and sets that attribute to an integer value which is the position of\n\t * the fragment within the fragments list.\n\t *\n\t * @param {object[]|*} fragments\n\t * @param {boolean} grouped If true the returned array will contain\n\t * nested arrays for all fragments with the same index\n\t * @return {object[]} sorted Sorted array of fragments\n\t */\n\tsort( fragments, grouped = false ) {\n\n\t\tfragments = Array.from( fragments );\n\n\t\tlet ordered = [],\n\t\t\tunordered = [],\n\t\t\tsorted = [];\n\n\t\t// Group ordered and unordered elements\n\t\tfragments.forEach( fragment => {\n\t\t\tif( fragment.hasAttribute( 'data-fragment-index' ) ) {\n\t\t\t\tlet index = parseInt( fragment.getAttribute( 'data-fragment-index' ), 10 );\n\n\t\t\t\tif( !ordered[index] ) {\n\t\t\t\t\tordered[index] = [];\n\t\t\t\t}\n\n\t\t\t\tordered[index].push( fragment );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tunordered.push( [ fragment ] );\n\t\t\t}\n\t\t} );\n\n\t\t// Append fragments without explicit indices in their\n\t\t// DOM order\n\t\tordered = ordered.concat( unordered );\n\n\t\t// Manually count the index up per group to ensure there\n\t\t// are no gaps\n\t\tlet index = 0;\n\n\t\t// Push all fragments in their sorted order to an array,\n\t\t// this flattens the groups\n\t\tordered.forEach( group => {\n\t\t\tgroup.forEach( fragment => {\n\t\t\t\tsorted.push( fragment );\n\t\t\t\tfragment.setAttribute( 'data-fragment-index', index );\n\t\t\t} );\n\n\t\t\tindex ++;\n\t\t} );\n\n\t\treturn grouped === true ? ordered : sorted;\n\n\t}\n\n\t/**\n\t * Sorts and formats all of fragments in the\n\t * presentation.\n\t */\n\tsortAll() {\n\n\t\tthis.Reveal.getHorizontalSlides().forEach( horizontalSlide => {\n\n\t\t\tlet verticalSlides = queryAll( horizontalSlide, 'section' );\n\t\t\tverticalSlides.forEach( ( verticalSlide, y ) => {\n\n\t\t\t\tthis.sort( verticalSlide.querySelectorAll( '.fragment' ) );\n\n\t\t\t}, this );\n\n\t\t\tif( verticalSlides.length === 0 ) this.sort( horizontalSlide.querySelectorAll( '.fragment' ) );\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Refreshes the fragments on the current slide so that they\n\t * have the appropriate classes (.visible + .current-fragment).\n\t *\n\t * @param {number} [index] The index of the current fragment\n\t * @param {array} [fragments] Array containing all fragments\n\t * in the current slide\n\t *\n\t * @return {{shown: array, hidden: array}}\n\t */\n\tupdate( index, fragments, slide = this.Reveal.getCurrentSlide() ) {\n\n\t\tlet changedFragments = {\n\t\t\tshown: [],\n\t\t\thidden: []\n\t\t};\n\n\t\tif( slide && this.Reveal.getConfig().fragments ) {\n\n\t\t\tfragments = fragments || this.sort( slide.querySelectorAll( '.fragment' ) );\n\n\t\t\tif( fragments.length ) {\n\n\t\t\t\tlet maxIndex = 0;\n\n\t\t\t\tif( typeof index !== 'number' ) {\n\t\t\t\t\tlet currentFragment = this.sort( slide.querySelectorAll( '.fragment.visible' ) ).pop();\n\t\t\t\t\tif( currentFragment ) {\n\t\t\t\t\t\tindex = parseInt( currentFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tArray.from( fragments ).forEach( ( el, i ) => {\n\n\t\t\t\t\tif( el.hasAttribute( 'data-fragment-index' ) ) {\n\t\t\t\t\t\ti = parseInt( el.getAttribute( 'data-fragment-index' ), 10 );\n\t\t\t\t\t}\n\n\t\t\t\t\tmaxIndex = Math.max( maxIndex, i );\n\n\t\t\t\t\t// Visible fragments\n\t\t\t\t\tif( i <= index ) {\n\t\t\t\t\t\tlet wasVisible = el.classList.contains( 'visible' )\n\t\t\t\t\t\tel.classList.add( 'visible' );\n\t\t\t\t\t\tel.classList.remove( 'current-fragment' );\n\n\t\t\t\t\t\tif( i === index ) {\n\t\t\t\t\t\t\t// Announce the fragments one by one to the Screen Reader\n\t\t\t\t\t\t\tthis.Reveal.announceStatus( this.Reveal.getStatusText( el ) );\n\n\t\t\t\t\t\t\tel.classList.add( 'current-fragment' );\n\t\t\t\t\t\t\tthis.Reveal.slideContent.startEmbeddedContent( el );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif( !wasVisible ) {\n\t\t\t\t\t\t\tchangedFragments.shown.push( el )\n\t\t\t\t\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\t\t\t\t\ttarget: el,\n\t\t\t\t\t\t\t\ttype: 'visible',\n\t\t\t\t\t\t\t\tbubbles: false\n\t\t\t\t\t\t\t});\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\t// Hidden fragments\n\t\t\t\t\telse {\n\t\t\t\t\t\tlet wasVisible = el.classList.contains( 'visible' )\n\t\t\t\t\t\tel.classList.remove( 'visible' );\n\t\t\t\t\t\tel.classList.remove( 'current-fragment' );\n\n\t\t\t\t\t\tif( wasVisible ) {\n\t\t\t\t\t\t\tthis.Reveal.slideContent.stopEmbeddedContent( el );\n\t\t\t\t\t\t\tchangedFragments.hidden.push( el );\n\t\t\t\t\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\t\t\t\t\ttarget: el,\n\t\t\t\t\t\t\t\ttype: 'hidden',\n\t\t\t\t\t\t\t\tbubbles: false\n\t\t\t\t\t\t\t});\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\n\t\t\t\t// Write the current fragment index to the slide <section>.\n\t\t\t\t// This can be used by end users to apply styles based on\n\t\t\t\t// the current fragment index.\n\t\t\t\tindex = typeof index === 'number' ? index : -1;\n\t\t\t\tindex = Math.max( Math.min( index, maxIndex ), -1 );\n\t\t\t\tslide.setAttribute( 'data-fragment', index );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif( changedFragments.hidden.length ) {\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'fragmenthidden',\n\t\t\t\tdata: {\n\t\t\t\t\tfragment: changedFragments.hidden[0],\n\t\t\t\t\tfragments: changedFragments.hidden\n\t\t\t\t}\n\t\t\t});\n\t\t}\n\n\t\tif( changedFragments.shown.length ) {\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'fragmentshown',\n\t\t\t\tdata: {\n\t\t\t\t\tfragment: changedFragments.shown[0],\n\t\t\t\t\tfragments: changedFragments.shown\n\t\t\t\t}\n\t\t\t});\n\t\t}\n\n\t\treturn changedFragments;\n\n\t}\n\n\t/**\n\t * Formats the fragments on the given slide so that they have\n\t * valid indices. Call this if fragments are changed in the DOM\n\t * after reveal.js has already initialized.\n\t *\n\t * @param {HTMLElement} slide\n\t * @return {Array} a list of the HTML fragments that were synced\n\t */\n\tsync( slide = this.Reveal.getCurrentSlide() ) {\n\n\t\treturn this.sort( slide.querySelectorAll( '.fragment' ) );\n\n\t}\n\n\t/**\n\t * Navigate to the specified slide fragment.\n\t *\n\t * @param {?number} index The index of the fragment that\n\t * should be shown, -1 means all are invisible\n\t * @param {number} offset Integer offset to apply to the\n\t * fragment index\n\t *\n\t * @return {boolean} true if a change was made in any\n\t * fragments visibility as part of this call\n\t */\n\tgoto( index, offset = 0 ) {\n\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tif( currentSlide && this.Reveal.getConfig().fragments ) {\n\n\t\t\tlet fragments = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled)' ) );\n\t\t\tif( fragments.length ) {\n\n\t\t\t\t// If no index is specified, find the current\n\t\t\t\tif( typeof index !== 'number' ) {\n\t\t\t\t\tlet lastVisibleFragment = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled).visible' ) ).pop();\n\n\t\t\t\t\tif( lastVisibleFragment ) {\n\t\t\t\t\t\tindex = parseInt( lastVisibleFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tindex = -1;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Apply the offset if there is one\n\t\t\t\tindex += offset;\n\n\t\t\t\tlet changedFragments = this.update( index, fragments );\n\n\t\t\t\tthis.Reveal.controls.update();\n\t\t\t\tthis.Reveal.progress.update();\n\n\t\t\t\tif( this.Reveal.getConfig().fragmentInURL ) {\n\t\t\t\t\tthis.Reveal.location.writeURL();\n\t\t\t\t}\n\n\t\t\t\treturn !!( changedFragments.shown.length || changedFragments.hidden.length );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Navigate to the next slide fragment.\n\t *\n\t * @return {boolean} true if there was a next fragment,\n\t * false otherwise\n\t */\n\tnext() {\n\n\t\treturn this.goto( null, 1 );\n\n\t}\n\n\t/**\n\t * Navigate to the previous slide fragment.\n\t *\n\t * @return {boolean} true if there was a previous fragment,\n\t * false otherwise\n\t */\n\tprev() {\n\n\t\treturn this.goto( null, -1 );\n\n\t}\n\n}","import { SLIDES_SELECTOR } from '../utils/constants.js'\nimport { extend, queryAll, transformElement } from '../utils/util.js'\n\n/**\n * Handles all logic related to the overview mode\n * (birds-eye view of all slides).\n */\nexport default class Overview {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.active = false;\n\n\t\tthis.onSlideClicked = this.onSlideClicked.bind( this );\n\n\t}\n\n\t/**\n\t * Displays the overview of slides (quick nav) by scaling\n\t * down and arranging all slide elements.\n\t */\n\tactivate() {\n\n\t\t// Only proceed if enabled in config\n\t\tif( this.Reveal.getConfig().overview && !this.Reveal.isScrollView() && !this.isActive() ) {\n\n\t\t\tthis.active = true;\n\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'overview' );\n\n\t\t\t// Don't auto-slide while in overview mode\n\t\t\tthis.Reveal.cancelAutoSlide();\n\n\t\t\t// Move the backgrounds element into the slide container to\n\t\t\t// that the same scaling is applied\n\t\t\tthis.Reveal.getSlidesElement().appendChild( this.Reveal.getBackgroundsElement() );\n\n\t\t\t// Clicking on an overview slide navigates to it\n\t\t\tqueryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => {\n\t\t\t\tif( !slide.classList.contains( 'stack' ) ) {\n\t\t\t\t\tslide.addEventListener( 'click', this.onSlideClicked, true );\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\t// Calculate slide sizes\n\t\t\tconst margin = 70;\n\t\t\tconst slideSize = this.Reveal.getComputedSlideSize();\n\t\t\tthis.overviewSlideWidth = slideSize.width + margin;\n\t\t\tthis.overviewSlideHeight = slideSize.height + margin;\n\n\t\t\t// Reverse in RTL mode\n\t\t\tif( this.Reveal.getConfig().rtl ) {\n\t\t\t\tthis.overviewSlideWidth = -this.overviewSlideWidth;\n\t\t\t}\n\n\t\t\tthis.Reveal.updateSlidesVisibility();\n\n\t\t\tthis.layout();\n\t\t\tthis.update();\n\n\t\t\tthis.Reveal.layout();\n\n\t\t\tconst indices = this.Reveal.getIndices();\n\n\t\t\t// Notify observers of the overview showing\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'overviewshown',\n\t\t\t\tdata: {\n\t\t\t\t\t'indexh': indices.h,\n\t\t\t\t\t'indexv': indices.v,\n\t\t\t\t\t'currentSlide': this.Reveal.getCurrentSlide()\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Uses CSS transforms to position all slides in a grid for\n\t * display inside of the overview mode.\n\t */\n\tlayout() {\n\n\t\t// Layout slides\n\t\tthis.Reveal.getHorizontalSlides().forEach( ( hslide, h ) => {\n\t\t\thslide.setAttribute( 'data-index-h', h );\n\t\t\ttransformElement( hslide, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' );\n\n\t\t\tif( hslide.classList.contains( 'stack' ) ) {\n\n\t\t\t\tqueryAll( hslide, 'section' ).forEach( ( vslide, v ) => {\n\t\t\t\t\tvslide.setAttribute( 'data-index-h', h );\n\t\t\t\t\tvslide.setAttribute( 'data-index-v', v );\n\n\t\t\t\t\ttransformElement( vslide, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' );\n\t\t\t\t} );\n\n\t\t\t}\n\t\t} );\n\n\t\t// Layout slide backgrounds\n\t\tArray.from( this.Reveal.getBackgroundsElement().childNodes ).forEach( ( hbackground, h ) => {\n\t\t\ttransformElement( hbackground, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' );\n\n\t\t\tqueryAll( hbackground, '.slide-background' ).forEach( ( vbackground, v ) => {\n\t\t\t\ttransformElement( vbackground, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' );\n\t\t\t} );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Moves the overview viewport to the current slides.\n\t * Called each time the current slide changes.\n\t */\n\tupdate() {\n\n\t\tconst vmin = Math.min( window.innerWidth, window.innerHeight );\n\t\tconst scale = Math.max( vmin / 5, 150 ) / vmin;\n\t\tconst indices = this.Reveal.getIndices();\n\n\t\tthis.Reveal.transformSlides( {\n\t\t\toverview: [\n\t\t\t\t'scale('+ scale +')',\n\t\t\t\t'translateX('+ ( -indices.h * this.overviewSlideWidth ) +'px)',\n\t\t\t\t'translateY('+ ( -indices.v * this.overviewSlideHeight ) +'px)'\n\t\t\t].join( ' ' )\n\t\t} );\n\n\t}\n\n\t/**\n\t * Exits the slide overview and enters the currently\n\t * active slide.\n\t */\n\tdeactivate() {\n\n\t\t// Only proceed if enabled in config\n\t\tif( this.Reveal.getConfig().overview ) {\n\n\t\t\tthis.active = false;\n\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'overview' );\n\n\t\t\t// Temporarily add a class so that transitions can do different things\n\t\t\t// depending on whether they are exiting/entering overview, or just\n\t\t\t// moving from slide to slide\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'overview-deactivating' );\n\n\t\t\tsetTimeout( () => {\n\t\t\t\tthis.Reveal.getRevealElement().classList.remove( 'overview-deactivating' );\n\t\t\t}, 1 );\n\n\t\t\t// Move the background element back out\n\t\t\tthis.Reveal.getRevealElement().appendChild( this.Reveal.getBackgroundsElement() );\n\n\t\t\t// Clean up changes made to slides\n\t\t\tqueryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => {\n\t\t\t\ttransformElement( slide, '' );\n\n\t\t\t\tslide.removeEventListener( 'click', this.onSlideClicked, true );\n\t\t\t} );\n\n\t\t\t// Clean up changes made to backgrounds\n\t\t\tqueryAll( this.Reveal.getBackgroundsElement(), '.slide-background' ).forEach( background => {\n\t\t\t\ttransformElement( background, '' );\n\t\t\t} );\n\n\t\t\tthis.Reveal.transformSlides( { overview: '' } );\n\n\t\t\tconst indices = this.Reveal.getIndices();\n\n\t\t\tthis.Reveal.slide( indices.h, indices.v );\n\t\t\tthis.Reveal.layout();\n\t\t\tthis.Reveal.cueAutoSlide();\n\n\t\t\t// Notify observers of the overview hiding\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'overviewhidden',\n\t\t\t\tdata: {\n\t\t\t\t\t'indexh': indices.h,\n\t\t\t\t\t'indexv': indices.v,\n\t\t\t\t\t'currentSlide': this.Reveal.getCurrentSlide()\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\t}\n\n\t/**\n\t * Toggles the slide overview mode on and off.\n\t *\n\t * @param {Boolean} [override] Flag which overrides the\n\t * toggle logic and forcibly sets the desired state. True means\n\t * overview is open, false means it's closed.\n\t */\n\ttoggle( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? this.activate() : this.deactivate();\n\t\t}\n\t\telse {\n\t\t\tthis.isActive() ? this.deactivate() : this.activate();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if the overview is currently active.\n\t *\n\t * @return {Boolean} true if the overview is active,\n\t * false otherwise\n\t */\n\tisActive() {\n\n\t\treturn this.active;\n\n\t}\n\n\t/**\n\t * Invoked when a slide is and we're in the overview.\n\t *\n\t * @param {object} event\n\t */\n\tonSlideClicked( event ) {\n\n\t\tif( this.isActive() ) {\n\t\t\tevent.preventDefault();\n\n\t\t\tlet element = event.target;\n\n\t\t\twhile( element && !element.nodeName.match( /section/gi ) ) {\n\t\t\t\telement = element.parentNode;\n\t\t\t}\n\n\t\t\tif( element && !element.classList.contains( 'disabled' ) ) {\n\n\t\t\t\tthis.deactivate();\n\n\t\t\t\tif( element.nodeName.match( /section/gi ) ) {\n\t\t\t\t\tlet h = parseInt( element.getAttribute( 'data-index-h' ), 10 ),\n\t\t\t\t\t\tv = parseInt( element.getAttribute( 'data-index-v' ), 10 );\n\n\t\t\t\t\tthis.Reveal.slide( h, v );\n\t\t\t\t}\n\n\t\t\t}\n\t\t}\n\n\t}\n\n}","import { enterFullscreen } from '../utils/util.js'\n\n/**\n * Handles all reveal.js keyboard interactions.\n */\nexport default class Keyboard {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// A key:value map of keyboard keys and descriptions of\n\t\t// the actions they trigger\n\t\tthis.shortcuts = {};\n\n\t\t// Holds custom key code mappings\n\t\tthis.bindings = {};\n\n\t\tthis.onDocumentKeyDown = this.onDocumentKeyDown.bind( this );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.navigationMode === 'linear' ) {\n\t\t\tthis.shortcuts['→ , ↓ , SPACE , N , L , J'] = 'Next slide';\n\t\t\tthis.shortcuts['← , ↑ , P , H , K'] = 'Previous slide';\n\t\t}\n\t\telse {\n\t\t\tthis.shortcuts['N , SPACE'] = 'Next slide';\n\t\t\tthis.shortcuts['P , Shift SPACE'] = 'Previous slide';\n\t\t\tthis.shortcuts['← , H'] = 'Navigate left';\n\t\t\tthis.shortcuts['→ , L'] = 'Navigate right';\n\t\t\tthis.shortcuts['↑ , K'] = 'Navigate up';\n\t\t\tthis.shortcuts['↓ , J'] = 'Navigate down';\n\t\t}\n\n\t\tthis.shortcuts['Alt + ←/↑/→/↓'] = 'Navigate without fragments';\n\t\tthis.shortcuts['Shift + ←/↑/→/↓'] = 'Jump to first/last slide';\n\t\tthis.shortcuts['B , .'] = 'Pause';\n\t\tthis.shortcuts['F'] = 'Fullscreen';\n\t\tthis.shortcuts['G'] = 'Jump to slide';\n\t\tthis.shortcuts['ESC, O'] = 'Slide overview';\n\n\t}\n\n\t/**\n\t * Starts listening for keyboard events.\n\t */\n\tbind() {\n\n\t\tdocument.addEventListener( 'keydown', this.onDocumentKeyDown, false );\n\n\t}\n\n\t/**\n\t * Stops listening for keyboard events.\n\t */\n\tunbind() {\n\n\t\tdocument.removeEventListener( 'keydown', this.onDocumentKeyDown, false );\n\n\t}\n\n\t/**\n\t * Add a custom key binding with optional description to\n\t * be added to the help screen.\n\t */\n\taddKeyBinding( binding, callback ) {\n\n\t\tif( typeof binding === 'object' && binding.keyCode ) {\n\t\t\tthis.bindings[binding.keyCode] = {\n\t\t\t\tcallback: callback,\n\t\t\t\tkey: binding.key,\n\t\t\t\tdescription: binding.description\n\t\t\t};\n\t\t}\n\t\telse {\n\t\t\tthis.bindings[binding] = {\n\t\t\t\tcallback: callback,\n\t\t\t\tkey: null,\n\t\t\t\tdescription: null\n\t\t\t};\n\t\t}\n\n\t}\n\n\t/**\n\t * Removes the specified custom key binding.\n\t */\n\tremoveKeyBinding( keyCode ) {\n\n\t\tdelete this.bindings[keyCode];\n\n\t}\n\n\t/**\n\t * Programmatically triggers a keyboard event\n\t *\n\t * @param {int} keyCode\n\t */\n\ttriggerKey( keyCode ) {\n\n\t\tthis.onDocumentKeyDown( { keyCode } );\n\n\t}\n\n\t/**\n\t * Registers a new shortcut to include in the help overlay\n\t *\n\t * @param {String} key\n\t * @param {String} value\n\t */\n\tregisterKeyboardShortcut( key, value ) {\n\n\t\tthis.shortcuts[key] = value;\n\n\t}\n\n\tgetShortcuts() {\n\n\t\treturn this.shortcuts;\n\n\t}\n\n\tgetBindings() {\n\n\t\treturn this.bindings;\n\n\t}\n\n\t/**\n\t * Handler for the document level 'keydown' event.\n\t *\n\t * @param {object} event\n\t */\n\tonDocumentKeyDown( event ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\n\t\t// If there's a condition specified and it returns false,\n\t\t// ignore this event\n\t\tif( typeof config.keyboardCondition === 'function' && config.keyboardCondition(event) === false ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// If keyboardCondition is set, only capture keyboard events\n\t\t// for embedded decks when they are focused\n\t\tif( config.keyboardCondition === 'focused' && !this.Reveal.isFocused() ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Shorthand\n\t\tlet keyCode = event.keyCode;\n\n\t\t// Remember if auto-sliding was paused so we can toggle it\n\t\tlet autoSlideWasPaused = !this.Reveal.isAutoSliding();\n\n\t\tthis.Reveal.onUserInput( event );\n\n\t\t// Is there a focused element that could be using the keyboard?\n\t\tlet activeElementIsCE = document.activeElement && document.activeElement.isContentEditable === true;\n\t\tlet activeElementIsInput = document.activeElement && document.activeElement.tagName && /input|textarea/i.test( document.activeElement.tagName );\n\t\tlet activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);\n\n\t\t// Whitelist certain modifiers for slide navigation shortcuts\n\t\tlet keyCodeUsesModifier = [32, 37, 38, 39, 40, 63, 78, 80, 191].indexOf( event.keyCode ) !== -1;\n\n\t\t// Prevent all other events when a modifier is pressed\n\t\tlet unusedModifier = \t!( keyCodeUsesModifier && event.shiftKey || event.altKey ) &&\n\t\t\t\t\t\t\t\t( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );\n\n\t\t// Disregard the event if there's a focused element or a\n\t\t// keyboard modifier key is present\n\t\tif( activeElementIsCE || activeElementIsInput || activeElementIsNotes || unusedModifier ) return;\n\n\t\t// While paused only allow resume keyboard events; 'b', 'v', '.'\n\t\tlet resumeKeyCodes = [66,86,190,191,112];\n\t\tlet key;\n\n\t\t// Custom key bindings for togglePause should be able to resume\n\t\tif( typeof config.keyboard === 'object' ) {\n\t\t\tfor( key in config.keyboard ) {\n\t\t\t\tif( config.keyboard[key] === 'togglePause' ) {\n\t\t\t\t\tresumeKeyCodes.push( parseInt( key, 10 ) );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif( this.Reveal.isPaused() && resumeKeyCodes.indexOf( keyCode ) === -1 ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Use linear navigation if we're configured to OR if\n\t\t// the presentation is one-dimensional\n\t\tlet useLinearMode = config.navigationMode === 'linear' || !this.Reveal.hasHorizontalSlides() || !this.Reveal.hasVerticalSlides();\n\n\t\tlet triggered = false;\n\n\t\t// 1. User defined key bindings\n\t\tif( typeof config.keyboard === 'object' ) {\n\n\t\t\tfor( key in config.keyboard ) {\n\n\t\t\t\t// Check if this binding matches the pressed key\n\t\t\t\tif( parseInt( key, 10 ) === keyCode ) {\n\n\t\t\t\t\tlet value = config.keyboard[ key ];\n\n\t\t\t\t\t// Callback function\n\t\t\t\t\tif( typeof value === 'function' ) {\n\t\t\t\t\t\tvalue.apply( null, [ event ] );\n\t\t\t\t\t}\n\t\t\t\t\t// String shortcuts to reveal.js API\n\t\t\t\t\telse if( typeof value === 'string' && typeof this.Reveal[ value ] === 'function' ) {\n\t\t\t\t\t\tthis.Reveal[ value ].call();\n\t\t\t\t\t}\n\n\t\t\t\t\ttriggered = true;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// 2. Registered custom key bindings\n\t\tif( triggered === false ) {\n\n\t\t\tfor( key in this.bindings ) {\n\n\t\t\t\t// Check if this binding matches the pressed key\n\t\t\t\tif( parseInt( key, 10 ) === keyCode ) {\n\n\t\t\t\t\tlet action = this.bindings[ key ].callback;\n\n\t\t\t\t\t// Callback function\n\t\t\t\t\tif( typeof action === 'function' ) {\n\t\t\t\t\t\taction.apply( null, [ event ] );\n\t\t\t\t\t}\n\t\t\t\t\t// String shortcuts to reveal.js API\n\t\t\t\t\telse if( typeof action === 'string' && typeof this.Reveal[ action ] === 'function' ) {\n\t\t\t\t\t\tthis.Reveal[ action ].call();\n\t\t\t\t\t}\n\n\t\t\t\t\ttriggered = true;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// 3. System defined key bindings\n\t\tif( triggered === false ) {\n\n\t\t\t// Assume true and try to prove false\n\t\t\ttriggered = true;\n\n\t\t\t// P, PAGE UP\n\t\t\tif( keyCode === 80 || keyCode === 33 ) {\n\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t}\n\t\t\t// N, PAGE DOWN\n\t\t\telse if( keyCode === 78 || keyCode === 34 ) {\n\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t}\n\t\t\t// H, LEFT\n\t\t\telse if( keyCode === 72 || keyCode === 37 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( 0 );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tif( config.rtl ) {\n\t\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.left({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// L, RIGHT\n\t\t\telse if( keyCode === 76 || keyCode === 39 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tif( config.rtl ) {\n\t\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.right({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// K, UP\n\t\t\telse if( keyCode === 75 || keyCode === 38 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( undefined, 0 );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.up({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// J, DOWN\n\t\t\telse if( keyCode === 74 || keyCode === 40 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( undefined, Number.MAX_VALUE );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.down({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// HOME\n\t\t\telse if( keyCode === 36 ) {\n\t\t\t\tthis.Reveal.slide( 0 );\n\t\t\t}\n\t\t\t// END\n\t\t\telse if( keyCode === 35 ) {\n\t\t\t\tthis.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );\n\t\t\t}\n\t\t\t// SPACE\n\t\t\telse if( keyCode === 32 ) {\n\t\t\t\tif( this.Reveal.overview.isActive() ) {\n\t\t\t\t\tthis.Reveal.overview.deactivate();\n\t\t\t\t}\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// TWO-SPOT, SEMICOLON, B, V, PERIOD, LOGITECH PRESENTER TOOLS \"BLACK SCREEN\" BUTTON\n\t\t\telse if( [58, 59, 66, 86, 190].includes( keyCode ) || ( keyCode === 191 && !event.shiftKey ) ) {\n\t\t\t\tthis.Reveal.togglePause();\n\t\t\t}\n\t\t\t// F\n\t\t\telse if( keyCode === 70 ) {\n\t\t\t\tenterFullscreen( config.embedded ? this.Reveal.getViewportElement() : document.documentElement );\n\t\t\t}\n\t\t\t// A\n\t\t\telse if( keyCode === 65 ) {\n\t\t\t\tif( config.autoSlideStoppable ) {\n\t\t\t\t\tthis.Reveal.toggleAutoSlide( autoSlideWasPaused );\n\t\t\t\t}\n\t\t\t}\n\t\t\t// G\n\t\t\telse if( keyCode === 71 ) {\n\t\t\t\tif( config.jumpToSlide ) {\n\t\t\t\t\tthis.Reveal.toggleJumpToSlide();\n\t\t\t\t}\n\t\t\t}\n\t\t\t// ?\n\t\t\telse if( ( keyCode === 63 || keyCode === 191 ) && event.shiftKey ) {\n\t\t\t\tthis.Reveal.toggleHelp();\n\t\t\t}\n\t\t\t// F1\n\t\t\telse if( keyCode === 112 ) {\n\t\t\t\tthis.Reveal.toggleHelp();\n\t\t\t}\n\t\t\telse {\n\t\t\t\ttriggered = false;\n\t\t\t}\n\n\t\t}\n\n\t\t// If the input resulted in a triggered action we should prevent\n\t\t// the browsers default behavior\n\t\tif( triggered ) {\n\t\t\tevent.preventDefault && event.preventDefault();\n\t\t}\n\t\t// ESC or O key\n\t\telse if( keyCode === 27 || keyCode === 79 ) {\n\t\t\tif( this.Reveal.closeOverlay() === false ) {\n\t\t\t\tthis.Reveal.overview.toggle();\n\t\t\t}\n\n\t\t\tevent.preventDefault && event.preventDefault();\n\t\t}\n\n\t\t// If auto-sliding is enabled we need to cue up\n\t\t// another timeout\n\t\tthis.Reveal.cueAutoSlide();\n\n\t}\n\n}\n","/**\n * Reads and writes the URL based on reveal.js' current state.\n */\nexport default class Location {\n\n\t// The minimum number of milliseconds that must pass between\n\t// calls to history.replaceState\n\tMAX_REPLACE_STATE_FREQUENCY = 1000\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// Delays updates to the URL due to a Chrome thumbnailer bug\n\t\tthis.writeURLTimeout = 0;\n\n\t\tthis.replaceStateTimestamp = 0;\n\n\t\tthis.onWindowHashChange = this.onWindowHashChange.bind( this );\n\n\t}\n\n\tbind() {\n\n\t\twindow.addEventListener( 'hashchange', this.onWindowHashChange, false );\n\n\t}\n\n\tunbind() {\n\n\t\twindow.removeEventListener( 'hashchange', this.onWindowHashChange, false );\n\n\t}\n\n\t/**\n\t * Returns the slide indices for the given hash link.\n\t *\n\t * @param {string} [hash] the hash string that we want to\n\t * find the indices for\n\t *\n\t * @returns slide indices or null\n\t */\n\tgetIndicesFromHash( hash=window.location.hash, options={} ) {\n\n\t\t// Attempt to parse the hash as either an index or name\n\t\tlet name = hash.replace( /^#\\/?/, '' );\n\t\tlet bits = name.split( '/' );\n\n\t\t// If the first bit is not fully numeric and there is a name we\n\t\t// can assume that this is a named link\n\t\tif( !/^[0-9]*$/.test( bits[0] ) && name.length ) {\n\t\t\tlet slide;\n\n\t\t\tlet f;\n\n\t\t\t// Parse named links with fragments (#/named-link/2)\n\t\t\tif( /\\/[-\\d]+$/g.test( name ) ) {\n\t\t\t\tf = parseInt( name.split( '/' ).pop(), 10 );\n\t\t\t\tf = isNaN(f) ? undefined : f;\n\t\t\t\tname = name.split( '/' ).shift();\n\t\t\t}\n\n\t\t\t// Ensure the named link is a valid HTML ID attribute\n\t\t\ttry {\n\t\t\t\tslide = document\n\t\t\t\t\t.getElementById( decodeURIComponent( name ) )\n\t\t\t\t\t.closest('.slides section');\n\t\t\t}\n\t\t\tcatch ( error ) { }\n\n\t\t\tif( slide ) {\n\t\t\t\treturn { ...this.Reveal.getIndices( slide ), f };\n\t\t\t}\n\t\t}\n\t\telse {\n\t\t\tconst config = this.Reveal.getConfig();\n\t\t\tlet hashIndexBase = config.hashOneBasedIndex || options.oneBasedIndex ? 1 : 0;\n\n\t\t\t// Read the index components of the hash\n\t\t\tlet h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0,\n\t\t\t\tv = ( parseInt( bits[1], 10 ) - hashIndexBase ) || 0,\n\t\t\t\tf;\n\n\t\t\tif( config.fragmentInURL ) {\n\t\t\t\tf = parseInt( bits[2], 10 );\n\t\t\t\tif( isNaN( f ) ) {\n\t\t\t\t\tf = undefined;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn { h, v, f };\n\t\t}\n\n\t\t// The hash couldn't be parsed or no matching named link was found\n\t\treturn null\n\n\t}\n\n\t/**\n\t * Reads the current URL (hash) and navigates accordingly.\n\t */\n\treadURL() {\n\n\t\tconst currentIndices = this.Reveal.getIndices();\n\t\tconst newIndices = this.getIndicesFromHash();\n\n\t\tif( newIndices ) {\n\t\t\tif( ( newIndices.h !== currentIndices.h || newIndices.v !== currentIndices.v || newIndices.f !== undefined ) ) {\n\t\t\t\t\tthis.Reveal.slide( newIndices.h, newIndices.v, newIndices.f );\n\t\t\t}\n\t\t}\n\t\t// If no new indices are available, we're trying to navigate to\n\t\t// a slide hash that does not exist\n\t\telse {\n\t\t\tthis.Reveal.slide( currentIndices.h || 0, currentIndices.v || 0 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates the page URL (hash) to reflect the current\n\t * state.\n\t *\n\t * @param {number} delay The time in ms to wait before\n\t * writing the hash\n\t */\n\twriteURL( delay ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\n\t\t// Make sure there's never more than one timeout running\n\t\tclearTimeout( this.writeURLTimeout );\n\n\t\t// If a delay is specified, timeout this call\n\t\tif( typeof delay === 'number' ) {\n\t\t\tthis.writeURLTimeout = setTimeout( this.writeURL, delay );\n\t\t}\n\t\telse if( currentSlide ) {\n\n\t\t\tlet hash = this.getHash();\n\n\t\t\t// If we're configured to push to history OR the history\n\t\t\t// API is not available.\n\t\t\tif( config.history ) {\n\t\t\t\twindow.location.hash = hash;\n\t\t\t}\n\t\t\t// If we're configured to reflect the current slide in the\n\t\t\t// URL without pushing to history.\n\t\t\telse if( config.hash ) {\n\t\t\t\t// If the hash is empty, don't add it to the URL\n\t\t\t\tif( hash === '/' ) {\n\t\t\t\t\tthis.debouncedReplaceState( window.location.pathname + window.location.search );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.debouncedReplaceState( '#' + hash );\n\t\t\t\t}\n\t\t\t}\n\t\t\t// UPDATE: The below nuking of all hash changes breaks\n\t\t\t// anchors on pages where reveal.js is running. Removed\n\t\t\t// in 4.0. Why was it here in the first place? ¯\\_(ツ)_/¯\n\t\t\t//\n\t\t\t// If history and hash are both disabled, a hash may still\n\t\t\t// be added to the URL by clicking on a href with a hash\n\t\t\t// target. Counter this by always removing the hash.\n\t\t\t// else {\n\t\t\t// \twindow.history.replaceState( null, null, window.location.pathname + window.location.search );\n\t\t\t// }\n\n\t\t}\n\n\t}\n\n\treplaceState( url ) {\n\n\t\twindow.history.replaceState( null, null, url );\n\t\tthis.replaceStateTimestamp = Date.now();\n\n\t}\n\n\tdebouncedReplaceState( url ) {\n\n\t\tclearTimeout( this.replaceStateTimeout );\n\n\t\tif( Date.now() - this.replaceStateTimestamp > this.MAX_REPLACE_STATE_FREQUENCY ) {\n\t\t\tthis.replaceState( url );\n\t\t}\n\t\telse {\n\t\t\tthis.replaceStateTimeout = setTimeout( () => this.replaceState( url ), this.MAX_REPLACE_STATE_FREQUENCY );\n\t\t}\n\n\t}\n\n\t/**\n\t * Return a hash URL that will resolve to the given slide location.\n\t *\n\t * @param {HTMLElement} [slide=currentSlide] The slide to link to\n\t */\n\tgetHash( slide ) {\n\n\t\tlet url = '/';\n\n\t\t// Attempt to create a named link based on the slide's ID\n\t\tlet s = slide || this.Reveal.getCurrentSlide();\n\t\tlet id = s ? s.getAttribute( 'id' ) : null;\n\t\tif( id ) {\n\t\t\tid = encodeURIComponent( id );\n\t\t}\n\n\t\tlet index = this.Reveal.getIndices( slide );\n\t\tif( !this.Reveal.getConfig().fragmentInURL ) {\n\t\t\tindex.f = undefined;\n\t\t}\n\n\t\t// If the current slide has an ID, use that as a named link,\n\t\t// but we don't support named links with a fragment index\n\t\tif( typeof id === 'string' && id.length ) {\n\t\t\turl = '/' + id;\n\n\t\t\t// If there is also a fragment, append that at the end\n\t\t\t// of the named link, like: #/named-link/2\n\t\t\tif( index.f >= 0 ) url += '/' + index.f;\n\t\t}\n\t\t// Otherwise use the /h/v index\n\t\telse {\n\t\t\tlet hashIndexBase = this.Reveal.getConfig().hashOneBasedIndex ? 1 : 0;\n\t\t\tif( index.h > 0 || index.v > 0 || index.f >= 0 ) url += index.h + hashIndexBase;\n\t\t\tif( index.v > 0 || index.f >= 0 ) url += '/' + (index.v + hashIndexBase );\n\t\t\tif( index.f >= 0 ) url += '/' + index.f;\n\t\t}\n\n\t\treturn url;\n\n\t}\n\n\t/**\n\t * Handler for the window level 'hashchange' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tonWindowHashChange( event ) {\n\n\t\tthis.readURL();\n\n\t}\n\n}","import { queryAll, enterFullscreen } from '../utils/util.js'\nimport { isAndroid } from '../utils/device.js'\n\n/**\n * Manages our presentation controls. This includes both\n * the built-in control arrows as well as event monitoring\n * of any elements within the presentation with either of the\n * following helper classes:\n * - .navigate-up\n * - .navigate-right\n * - .navigate-down\n * - .navigate-left\n * - .navigate-next\n * - .navigate-prev\n * - .enter-fullscreen\n */\nexport default class Controls {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onNavigateLeftClicked = this.onNavigateLeftClicked.bind( this );\n\t\tthis.onNavigateRightClicked = this.onNavigateRightClicked.bind( this );\n\t\tthis.onNavigateUpClicked = this.onNavigateUpClicked.bind( this );\n\t\tthis.onNavigateDownClicked = this.onNavigateDownClicked.bind( this );\n\t\tthis.onNavigatePrevClicked = this.onNavigatePrevClicked.bind( this );\n\t\tthis.onNavigateNextClicked = this.onNavigateNextClicked.bind( this );\n\t\tthis.onEnterFullscreen = this.onEnterFullscreen.bind( this );\n\n\t}\n\n\trender() {\n\n\t\tconst rtl = this.Reveal.getConfig().rtl;\n\t\tconst revealElement = this.Reveal.getRevealElement();\n\n\t\tthis.element = document.createElement( 'aside' );\n\t\tthis.element.className = 'controls';\n\t\tthis.element.innerHTML =\n\t\t\t`<button class=\"navigate-left\" aria-label=\"${ rtl ? 'next slide' : 'previous slide' }\"><div class=\"controls-arrow\"></div></button>\n\t\t\t<button class=\"navigate-right\" aria-label=\"${ rtl ? 'previous slide' : 'next slide' }\"><div class=\"controls-arrow\"></div></button>\n\t\t\t<button class=\"navigate-up\" aria-label=\"above slide\"><div class=\"controls-arrow\"></div></button>\n\t\t\t<button class=\"navigate-down\" aria-label=\"below slide\"><div class=\"controls-arrow\"></div></button>`;\n\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t\t// There can be multiple instances of controls throughout the page\n\t\tthis.controlsLeft = queryAll( revealElement, '.navigate-left' );\n\t\tthis.controlsRight = queryAll( revealElement, '.navigate-right' );\n\t\tthis.controlsUp = queryAll( revealElement, '.navigate-up' );\n\t\tthis.controlsDown = queryAll( revealElement, '.navigate-down' );\n\t\tthis.controlsPrev = queryAll( revealElement, '.navigate-prev' );\n\t\tthis.controlsNext = queryAll( revealElement, '.navigate-next' );\n\t\tthis.controlsFullscreen = queryAll( revealElement, '.enter-fullscreen' );\n\n\t\t// The left, right and down arrows in the standard reveal.js controls\n\t\tthis.controlsRightArrow = this.element.querySelector( '.navigate-right' );\n\t\tthis.controlsLeftArrow = this.element.querySelector( '.navigate-left' );\n\t\tthis.controlsDownArrow = this.element.querySelector( '.navigate-down' );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tthis.element.style.display = config.controls ? 'block' : 'none';\n\n\t\tthis.element.setAttribute( 'data-controls-layout', config.controlsLayout );\n\t\tthis.element.setAttribute( 'data-controls-back-arrows', config.controlsBackArrows );\n\n\t}\n\n\tbind() {\n\n\t\t// Listen to both touch and click events, in case the device\n\t\t// supports both\n\t\tlet pointerEvents = [ 'touchstart', 'click' ];\n\n\t\t// Only support touch for Android, fixes double navigations in\n\t\t// stock browser\n\t\tif( isAndroid ) {\n\t\t\tpointerEvents = [ 'touchstart' ];\n\t\t}\n\n\t\tpointerEvents.forEach( eventName => {\n\t\t\tthis.controlsLeft.forEach( el => el.addEventListener( eventName, this.onNavigateLeftClicked, false ) );\n\t\t\tthis.controlsRight.forEach( el => el.addEventListener( eventName, this.onNavigateRightClicked, false ) );\n\t\t\tthis.controlsUp.forEach( el => el.addEventListener( eventName, this.onNavigateUpClicked, false ) );\n\t\t\tthis.controlsDown.forEach( el => el.addEventListener( eventName, this.onNavigateDownClicked, false ) );\n\t\t\tthis.controlsPrev.forEach( el => el.addEventListener( eventName, this.onNavigatePrevClicked, false ) );\n\t\t\tthis.controlsNext.forEach( el => el.addEventListener( eventName, this.onNavigateNextClicked, false ) );\n\t\t\tthis.controlsFullscreen.forEach( el => el.addEventListener( eventName, this.onEnterFullscreen, false ) );\n\t\t} );\n\n\t}\n\n\tunbind() {\n\n\t\t[ 'touchstart', 'click' ].forEach( eventName => {\n\t\t\tthis.controlsLeft.forEach( el => el.removeEventListener( eventName, this.onNavigateLeftClicked, false ) );\n\t\t\tthis.controlsRight.forEach( el => el.removeEventListener( eventName, this.onNavigateRightClicked, false ) );\n\t\t\tthis.controlsUp.forEach( el => el.removeEventListener( eventName, this.onNavigateUpClicked, false ) );\n\t\t\tthis.controlsDown.forEach( el => el.removeEventListener( eventName, this.onNavigateDownClicked, false ) );\n\t\t\tthis.controlsPrev.forEach( el => el.removeEventListener( eventName, this.onNavigatePrevClicked, false ) );\n\t\t\tthis.controlsNext.forEach( el => el.removeEventListener( eventName, this.onNavigateNextClicked, false ) );\n\t\t\tthis.controlsFullscreen.forEach( el => el.removeEventListener( eventName, this.onEnterFullscreen, false ) );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Updates the state of all control/navigation arrows.\n\t */\n\tupdate() {\n\n\t\tlet routes = this.Reveal.availableRoutes();\n\n\t\t// Remove the 'enabled' class from all directions\n\t\t[...this.controlsLeft, ...this.controlsRight, ...this.controlsUp, ...this.controlsDown, ...this.controlsPrev, ...this.controlsNext].forEach( node => {\n\t\t\tnode.classList.remove( 'enabled', 'fragmented' );\n\n\t\t\t// Set 'disabled' attribute on all directions\n\t\t\tnode.setAttribute( 'disabled', 'disabled' );\n\t\t} );\n\n\t\t// Add the 'enabled' class to the available routes; remove 'disabled' attribute to enable buttons\n\t\tif( routes.left ) this.controlsLeft.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\tif( routes.right ) this.controlsRight.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\tif( routes.up ) this.controlsUp.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\tif( routes.down ) this.controlsDown.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\n\t\t// Prev/next buttons\n\t\tif( routes.left || routes.up ) this.controlsPrev.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\tif( routes.right || routes.down ) this.controlsNext.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\n\t\t// Highlight fragment directions\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tif( currentSlide ) {\n\n\t\t\tlet fragmentsRoutes = this.Reveal.fragments.availableRoutes();\n\n\t\t\t// Always apply fragment decorator to prev/next buttons\n\t\t\tif( fragmentsRoutes.prev ) this.controlsPrev.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\tif( fragmentsRoutes.next ) this.controlsNext.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\n\t\t\t// Apply fragment decorators to directional buttons based on\n\t\t\t// what slide axis they are in\n\t\t\tif( this.Reveal.isVerticalSlide( currentSlide ) ) {\n\t\t\t\tif( fragmentsRoutes.prev ) this.controlsUp.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\t\tif( fragmentsRoutes.next ) this.controlsDown.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tif( fragmentsRoutes.prev ) this.controlsLeft.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\t\tif( fragmentsRoutes.next ) this.controlsRight.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\t}\n\n\t\t}\n\n\t\tif( this.Reveal.getConfig().controlsTutorial ) {\n\n\t\t\tlet indices = this.Reveal.getIndices();\n\n\t\t\t// Highlight control arrows with an animation to ensure\n\t\t\t// that the viewer knows how to navigate\n\t\t\tif( !this.Reveal.hasNavigatedVertically() && routes.down ) {\n\t\t\t\tthis.controlsDownArrow.classList.add( 'highlight' );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tthis.controlsDownArrow.classList.remove( 'highlight' );\n\n\t\t\t\tif( this.Reveal.getConfig().rtl ) {\n\n\t\t\t\t\tif( !this.Reveal.hasNavigatedHorizontally() && routes.left && indices.v === 0 ) {\n\t\t\t\t\t\tthis.controlsLeftArrow.classList.add( 'highlight' );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.controlsLeftArrow.classList.remove( 'highlight' );\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tif( !this.Reveal.hasNavigatedHorizontally() && routes.right && indices.v === 0 ) {\n\t\t\t\t\t\tthis.controlsRightArrow.classList.add( 'highlight' );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.controlsRightArrow.classList.remove( 'highlight' );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\tdestroy() {\n\n\t\tthis.unbind();\n\t\tthis.element.remove();\n\n\t}\n\n\t/**\n\t * Event handlers for navigation control buttons.\n\t */\n\tonNavigateLeftClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tif( this.Reveal.getConfig().navigationMode === 'linear' ) {\n\t\t\tthis.Reveal.prev();\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.left();\n\t\t}\n\n\t}\n\n\tonNavigateRightClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tif( this.Reveal.getConfig().navigationMode === 'linear' ) {\n\t\t\tthis.Reveal.next();\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.right();\n\t\t}\n\n\t}\n\n\tonNavigateUpClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tthis.Reveal.up();\n\n\t}\n\n\tonNavigateDownClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tthis.Reveal.down();\n\n\t}\n\n\tonNavigatePrevClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tthis.Reveal.prev();\n\n\t}\n\n\tonNavigateNextClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tthis.Reveal.next();\n\n\t}\n\n\tonEnterFullscreen( event ) {\n\n\t\tconst config = this.Reveal.getConfig();\n\t\tconst viewport = this.Reveal.getViewportElement();\n\n\t\tenterFullscreen( config.embedded ? viewport : viewport.parentElement );\n\n\t}\n\n}","/**\n * Creates a visual progress bar for the presentation.\n */\nexport default class Progress {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onProgressClicked = this.onProgressClicked.bind( this );\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'progress';\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t\tthis.bar = document.createElement( 'span' );\n\t\tthis.element.appendChild( this.bar );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tthis.element.style.display = config.progress ? 'block' : 'none';\n\n\t}\n\n\tbind() {\n\n\t\tif( this.Reveal.getConfig().progress && this.element ) {\n\t\t\tthis.element.addEventListener( 'click', this.onProgressClicked, false );\n\t\t}\n\n\t}\n\n\tunbind() {\n\n\t\tif ( this.Reveal.getConfig().progress && this.element ) {\n\t\t\tthis.element.removeEventListener( 'click', this.onProgressClicked, false );\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates the progress bar to reflect the current slide.\n\t */\n\tupdate() {\n\n\t\t// Update progress if enabled\n\t\tif( this.Reveal.getConfig().progress && this.bar ) {\n\n\t\t\tlet scale = this.Reveal.getProgress();\n\n\t\t\t// Don't fill the progress bar if there's only one slide\n\t\t\tif( this.Reveal.getTotalSlides() < 2 ) {\n\t\t\t\tscale = 0;\n\t\t\t}\n\n\t\t\tthis.bar.style.transform = 'scaleX('+ scale +')';\n\n\t\t}\n\n\t}\n\n\tgetMaxWidth() {\n\n\t\treturn this.Reveal.getRevealElement().offsetWidth;\n\n\t}\n\n\t/**\n\t * Clicking on the progress bar results in a navigation to the\n\t * closest approximate horizontal slide using this equation:\n\t *\n\t * ( clickX / presentationWidth ) * numberOfSlides\n\t *\n\t * @param {object} event\n\t */\n\tonProgressClicked( event ) {\n\n\t\tthis.Reveal.onUserInput( event );\n\n\t\tevent.preventDefault();\n\n\t\tlet slides = this.Reveal.getSlides();\n\t\tlet slidesTotal = slides.length;\n\t\tlet slideIndex = Math.floor( ( event.clientX / this.getMaxWidth() ) * slidesTotal );\n\n\t\tif( this.Reveal.getConfig().rtl ) {\n\t\t\tslideIndex = slidesTotal - slideIndex;\n\t\t}\n\n\t\tlet targetIndices = this.Reveal.getIndices(slides[slideIndex]);\n\t\tthis.Reveal.slide( targetIndices.h, targetIndices.v );\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}","/**\n * Handles hiding of the pointer/cursor when inactive.\n */\nexport default class Pointer {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// Throttles mouse wheel navigation\n\t\tthis.lastMouseWheelStep = 0;\n\n\t\t// Is the mouse pointer currently hidden from view\n\t\tthis.cursorHidden = false;\n\n\t\t// Timeout used to determine when the cursor is inactive\n\t\tthis.cursorInactiveTimeout = 0;\n\n\t\tthis.onDocumentCursorActive = this.onDocumentCursorActive.bind( this );\n\t\tthis.onDocumentMouseScroll = this.onDocumentMouseScroll.bind( this );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.mouseWheel ) {\n\t\t\tdocument.addEventListener( 'wheel', this.onDocumentMouseScroll, false );\n\t\t}\n\t\telse {\n\t\t\tdocument.removeEventListener( 'wheel', this.onDocumentMouseScroll, false );\n\t\t}\n\n\t\t// Auto-hide the mouse pointer when its inactive\n\t\tif( config.hideInactiveCursor ) {\n\t\t\tdocument.addEventListener( 'mousemove', this.onDocumentCursorActive, false );\n\t\t\tdocument.addEventListener( 'mousedown', this.onDocumentCursorActive, false );\n\t\t}\n\t\telse {\n\t\t\tthis.showCursor();\n\n\t\t\tdocument.removeEventListener( 'mousemove', this.onDocumentCursorActive, false );\n\t\t\tdocument.removeEventListener( 'mousedown', this.onDocumentCursorActive, false );\n\t\t}\n\n\t}\n\n\t/**\n\t * Shows the mouse pointer after it has been hidden with\n\t * #hideCursor.\n\t */\n\tshowCursor() {\n\n\t\tif( this.cursorHidden ) {\n\t\t\tthis.cursorHidden = false;\n\t\t\tthis.Reveal.getRevealElement().style.cursor = '';\n\t\t}\n\n\t}\n\n\t/**\n\t * Hides the mouse pointer when it's on top of the .reveal\n\t * container.\n\t */\n\thideCursor() {\n\n\t\tif( this.cursorHidden === false ) {\n\t\t\tthis.cursorHidden = true;\n\t\t\tthis.Reveal.getRevealElement().style.cursor = 'none';\n\t\t}\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.showCursor();\n\n\t\tdocument.removeEventListener( 'wheel', this.onDocumentMouseScroll, false );\n\t\tdocument.removeEventListener( 'mousemove', this.onDocumentCursorActive, false );\n\t\tdocument.removeEventListener( 'mousedown', this.onDocumentCursorActive, false );\n\n\t}\n\n\t/**\n\t * Called whenever there is mouse input at the document level\n\t * to determine if the cursor is active or not.\n\t *\n\t * @param {object} event\n\t */\n\tonDocumentCursorActive( event ) {\n\n\t\tthis.showCursor();\n\n\t\tclearTimeout( this.cursorInactiveTimeout );\n\n\t\tthis.cursorInactiveTimeout = setTimeout( this.hideCursor.bind( this ), this.Reveal.getConfig().hideCursorTime );\n\n\t}\n\n\t/**\n\t * Handles mouse wheel scrolling, throttled to avoid skipping\n\t * multiple slides.\n\t *\n\t * @param {object} event\n\t */\n\tonDocumentMouseScroll( event ) {\n\n\t\tif( Date.now() - this.lastMouseWheelStep > 1000 ) {\n\n\t\t\tthis.lastMouseWheelStep = Date.now();\n\n\t\t\tlet delta = event.detail || -event.wheelDelta;\n\t\t\tif( delta > 0 ) {\n\t\t\t\tthis.Reveal.next();\n\t\t\t}\n\t\t\telse if( delta < 0 ) {\n\t\t\t\tthis.Reveal.prev();\n\t\t\t}\n\n\t\t}\n\n\t}\n\n}\n","/**\n * Loads a JavaScript file from the given URL and executes it.\n *\n * @param {string} url Address of the .js file to load\n * @param {function} callback Method to invoke when the script\n * has loaded and executed\n */\nexport const loadScript = ( url, callback ) => {\n\n\tconst script = document.createElement( 'script' );\n\tscript.type = 'text/javascript';\n\tscript.async = false;\n\tscript.defer = false;\n\tscript.src = url;\n\n\tif( typeof callback === 'function' ) {\n\n\t\t// Success callback\n\t\tscript.onload = script.onreadystatechange = event => {\n\t\t\tif( event.type === 'load' || /loaded|complete/.test( script.readyState ) ) {\n\n\t\t\t\t// Kill event listeners\n\t\t\t\tscript.onload = script.onreadystatechange = script.onerror = null;\n\n\t\t\t\tcallback();\n\n\t\t\t}\n\t\t};\n\n\t\t// Error callback\n\t\tscript.onerror = err => {\n\n\t\t\t// Kill event listeners\n\t\t\tscript.onload = script.onreadystatechange = script.onerror = null;\n\n\t\t\tcallback( new Error( 'Failed loading script: ' + script.src + '\\n' + err ) );\n\n\t\t};\n\n\t}\n\n\t// Append the script at the end of <head>\n\tconst head = document.querySelector( 'head' );\n\thead.insertBefore( script, head.lastChild );\n\n}","import { loadScript } from '../utils/loader.js'\n\n/**\n * Manages loading and registering of reveal.js plugins.\n */\nexport default class Plugins {\n\n\tconstructor( reveal ) {\n\n\t\tthis.Reveal = reveal;\n\n\t\t// Flags our current state (idle -> loading -> loaded)\n\t\tthis.state = 'idle';\n\n\t\t// An id:instance map of currently registered plugins\n\t\tthis.registeredPlugins = {};\n\n\t\tthis.asyncDependencies = [];\n\n\t}\n\n\t/**\n\t * Loads reveal.js dependencies, registers and\n\t * initializes plugins.\n\t *\n\t * Plugins are direct references to a reveal.js plugin\n\t * object that we register and initialize after any\n\t * synchronous dependencies have loaded.\n\t *\n\t * Dependencies are defined via the 'dependencies' config\n\t * option and will be loaded prior to starting reveal.js.\n\t * Some dependencies may have an 'async' flag, if so they\n\t * will load after reveal.js has been started up.\n\t */\n\tload( plugins, dependencies ) {\n\n\t\tthis.state = 'loading';\n\n\t\tplugins.forEach( this.registerPlugin.bind( this ) );\n\n\t\treturn new Promise( resolve => {\n\n\t\t\tlet scripts = [],\n\t\t\t\tscriptsToLoad = 0;\n\n\t\t\tdependencies.forEach( s => {\n\t\t\t\t// Load if there's no condition or the condition is truthy\n\t\t\t\tif( !s.condition || s.condition() ) {\n\t\t\t\t\tif( s.async ) {\n\t\t\t\t\t\tthis.asyncDependencies.push( s );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tscripts.push( s );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\tif( scripts.length ) {\n\t\t\t\tscriptsToLoad = scripts.length;\n\n\t\t\t\tconst scriptLoadedCallback = (s) => {\n\t\t\t\t\tif( s && typeof s.callback === 'function' ) s.callback();\n\n\t\t\t\t\tif( --scriptsToLoad === 0 ) {\n\t\t\t\t\t\tthis.initPlugins().then( resolve );\n\t\t\t\t\t}\n\t\t\t\t};\n\n\t\t\t\t// Load synchronous scripts\n\t\t\t\tscripts.forEach( s => {\n\t\t\t\t\tif( typeof s.id === 'string' ) {\n\t\t\t\t\t\tthis.registerPlugin( s );\n\t\t\t\t\t\tscriptLoadedCallback( s );\n\t\t\t\t\t}\n\t\t\t\t\telse if( typeof s.src === 'string' ) {\n\t\t\t\t\t\tloadScript( s.src, () => scriptLoadedCallback(s) );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tconsole.warn( 'Unrecognized plugin format', s );\n\t\t\t\t\t\tscriptLoadedCallback();\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tthis.initPlugins().then( resolve );\n\t\t\t}\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Initializes our plugins and waits for them to be ready\n\t * before proceeding.\n\t */\n\tinitPlugins() {\n\n\t\treturn new Promise( resolve => {\n\n\t\t\tlet pluginValues = Object.values( this.registeredPlugins );\n\t\t\tlet pluginsToInitialize = pluginValues.length;\n\n\t\t\t// If there are no plugins, skip this step\n\t\t\tif( pluginsToInitialize === 0 ) {\n\t\t\t\tthis.loadAsync().then( resolve );\n\t\t\t}\n\t\t\t// ... otherwise initialize plugins\n\t\t\telse {\n\n\t\t\t\tlet initNextPlugin;\n\n\t\t\t\tlet afterPlugInitialized = () => {\n\t\t\t\t\tif( --pluginsToInitialize === 0 ) {\n\t\t\t\t\t\tthis.loadAsync().then( resolve );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tinitNextPlugin();\n\t\t\t\t\t}\n\t\t\t\t};\n\n\t\t\t\tlet i = 0;\n\n\t\t\t\t// Initialize plugins serially\n\t\t\t\tinitNextPlugin = () => {\n\n\t\t\t\t\tlet plugin = pluginValues[i++];\n\n\t\t\t\t\t// If the plugin has an 'init' method, invoke it\n\t\t\t\t\tif( typeof plugin.init === 'function' ) {\n\t\t\t\t\t\tlet promise = plugin.init( this.Reveal );\n\n\t\t\t\t\t\t// If the plugin returned a Promise, wait for it\n\t\t\t\t\t\tif( promise && typeof promise.then === 'function' ) {\n\t\t\t\t\t\t\tpromise.then( afterPlugInitialized );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tafterPlugInitialized();\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tafterPlugInitialized();\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tinitNextPlugin();\n\n\t\t\t}\n\n\t\t} )\n\n\t}\n\n\t/**\n\t * Loads all async reveal.js dependencies.\n\t */\n\tloadAsync() {\n\n\t\tthis.state = 'loaded';\n\n\t\tif( this.asyncDependencies.length ) {\n\t\t\tthis.asyncDependencies.forEach( s => {\n\t\t\t\tloadScript( s.src, s.callback );\n\t\t\t} );\n\t\t}\n\n\t\treturn Promise.resolve();\n\n\t}\n\n\t/**\n\t * Registers a new plugin with this reveal.js instance.\n\t *\n\t * reveal.js waits for all registered plugins to initialize\n\t * before considering itself ready, as long as the plugin\n\t * is registered before calling `Reveal.initialize()`.\n\t */\n\tregisterPlugin( plugin ) {\n\n\t\t// Backwards compatibility to make reveal.js ~3.9.0\n\t\t// plugins work with reveal.js 4.0.0\n\t\tif( arguments.length === 2 && typeof arguments[0] === 'string' ) {\n\t\t\tplugin = arguments[1];\n\t\t\tplugin.id = arguments[0];\n\t\t}\n\t\t// Plugin can optionally be a function which we call\n\t\t// to create an instance of the plugin\n\t\telse if( typeof plugin === 'function' ) {\n\t\t\tplugin = plugin();\n\t\t}\n\n\t\tlet id = plugin.id;\n\n\t\tif( typeof id !== 'string' ) {\n\t\t\tconsole.warn( 'Unrecognized plugin format; can\\'t find plugin.id', plugin );\n\t\t}\n\t\telse if( this.registeredPlugins[id] === undefined ) {\n\t\t\tthis.registeredPlugins[id] = plugin;\n\n\t\t\t// If a plugin is registered after reveal.js is loaded,\n\t\t\t// initialize it right away\n\t\t\tif( this.state === 'loaded' && typeof plugin.init === 'function' ) {\n\t\t\t\tplugin.init( this.Reveal );\n\t\t\t}\n\t\t}\n\t\telse {\n\t\t\tconsole.warn( 'reveal.js: \"'+ id +'\" plugin has already been registered' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if a specific plugin has been registered.\n\t *\n\t * @param {String} id Unique plugin identifier\n\t */\n\thasPlugin( id ) {\n\n\t\treturn !!this.registeredPlugins[id];\n\n\t}\n\n\t/**\n\t * Returns the specific plugin instance, if a plugin\n\t * with the given ID has been registered.\n\t *\n\t * @param {String} id Unique plugin identifier\n\t */\n\tgetPlugin( id ) {\n\n\t\treturn this.registeredPlugins[id];\n\n\t}\n\n\tgetRegisteredPlugins() {\n\n\t\treturn this.registeredPlugins;\n\n\t}\n\n\tdestroy() {\n\n\t\tObject.values( this.registeredPlugins ).forEach( plugin => {\n\t\t\tif( typeof plugin.destroy === 'function' ) {\n\t\t\t\tplugin.destroy();\n\t\t\t}\n\t\t} );\n\n\t\tthis.registeredPlugins = {};\n\t\tthis.asyncDependencies = [];\n\n\t}\n\n}\n","import { isAndroid } from '../utils/device.js'\nimport { matches } from '../utils/util.js'\n\nconst SWIPE_THRESHOLD = 40;\n\n/**\n * Controls all touch interactions and navigations for\n * a presentation.\n */\nexport default class Touch {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// Holds information about the currently ongoing touch interaction\n\t\tthis.touchStartX = 0;\n\t\tthis.touchStartY = 0;\n\t\tthis.touchStartCount = 0;\n\t\tthis.touchCaptured = false;\n\n\t\tthis.onPointerDown = this.onPointerDown.bind( this );\n\t\tthis.onPointerMove = this.onPointerMove.bind( this );\n\t\tthis.onPointerUp = this.onPointerUp.bind( this );\n\t\tthis.onTouchStart = this.onTouchStart.bind( this );\n\t\tthis.onTouchMove = this.onTouchMove.bind( this );\n\t\tthis.onTouchEnd = this.onTouchEnd.bind( this );\n\n\t}\n\n\t/**\n\t *\n\t */\n\tbind() {\n\n\t\tlet revealElement = this.Reveal.getRevealElement();\n\n\t\tif( 'onpointerdown' in window ) {\n\t\t\t// Use W3C pointer events\n\t\t\trevealElement.addEventListener( 'pointerdown', this.onPointerDown, false );\n\t\t\trevealElement.addEventListener( 'pointermove', this.onPointerMove, false );\n\t\t\trevealElement.addEventListener( 'pointerup', this.onPointerUp, false );\n\t\t}\n\t\telse if( window.navigator.msPointerEnabled ) {\n\t\t\t// IE 10 uses prefixed version of pointer events\n\t\t\trevealElement.addEventListener( 'MSPointerDown', this.onPointerDown, false );\n\t\t\trevealElement.addEventListener( 'MSPointerMove', this.onPointerMove, false );\n\t\t\trevealElement.addEventListener( 'MSPointerUp', this.onPointerUp, false );\n\t\t}\n\t\telse {\n\t\t\t// Fall back to touch events\n\t\t\trevealElement.addEventListener( 'touchstart', this.onTouchStart, false );\n\t\t\trevealElement.addEventListener( 'touchmove', this.onTouchMove, false );\n\t\t\trevealElement.addEventListener( 'touchend', this.onTouchEnd, false );\n\t\t}\n\n\t}\n\n\t/**\n\t *\n\t */\n\tunbind() {\n\n\t\tlet revealElement = this.Reveal.getRevealElement();\n\n\t\trevealElement.removeEventListener( 'pointerdown', this.onPointerDown, false );\n\t\trevealElement.removeEventListener( 'pointermove', this.onPointerMove, false );\n\t\trevealElement.removeEventListener( 'pointerup', this.onPointerUp, false );\n\n\t\trevealElement.removeEventListener( 'MSPointerDown', this.onPointerDown, false );\n\t\trevealElement.removeEventListener( 'MSPointerMove', this.onPointerMove, false );\n\t\trevealElement.removeEventListener( 'MSPointerUp', this.onPointerUp, false );\n\n\t\trevealElement.removeEventListener( 'touchstart', this.onTouchStart, false );\n\t\trevealElement.removeEventListener( 'touchmove', this.onTouchMove, false );\n\t\trevealElement.removeEventListener( 'touchend', this.onTouchEnd, false );\n\n\t}\n\n\t/**\n\t * Checks if the target element prevents the triggering of\n\t * swipe navigation.\n\t */\n\tisSwipePrevented( target ) {\n\n\t\t// Prevent accidental swipes when scrubbing timelines\n\t\tif( matches( target, 'video[controls], audio[controls]' ) ) return true;\n\n\t\twhile( target && typeof target.hasAttribute === 'function' ) {\n\t\t\tif( target.hasAttribute( 'data-prevent-swipe' ) ) return true;\n\t\t\ttarget = target.parentNode;\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Handler for the 'touchstart' event, enables support for\n\t * swipe and pinch gestures.\n\t *\n\t * @param {object} event\n\t */\n\tonTouchStart( event ) {\n\n\t\tthis.touchCaptured = false;\n\n\t\tif( this.isSwipePrevented( event.target ) ) return true;\n\n\t\tthis.touchStartX = event.touches[0].clientX;\n\t\tthis.touchStartY = event.touches[0].clientY;\n\t\tthis.touchStartCount = event.touches.length;\n\n\t}\n\n\t/**\n\t * Handler for the 'touchmove' event.\n\t *\n\t * @param {object} event\n\t */\n\tonTouchMove( event ) {\n\n\t\tif( this.isSwipePrevented( event.target ) ) return true;\n\n\t\tlet config = this.Reveal.getConfig();\n\n\t\t// Each touch should only trigger one action\n\t\tif( !this.touchCaptured ) {\n\t\t\tthis.Reveal.onUserInput( event );\n\n\t\t\tlet currentX = event.touches[0].clientX;\n\t\t\tlet currentY = event.touches[0].clientY;\n\n\t\t\t// There was only one touch point, look for a swipe\n\t\t\tif( event.touches.length === 1 && this.touchStartCount !== 2 ) {\n\n\t\t\t\tlet availableRoutes = this.Reveal.availableRoutes({ includeFragments: true });\n\n\t\t\t\tlet deltaX = currentX - this.touchStartX,\n\t\t\t\t\tdeltaY = currentY - this.touchStartY;\n\n\t\t\t\tif( deltaX > SWIPE_THRESHOLD && Math.abs( deltaX ) > Math.abs( deltaY ) ) {\n\t\t\t\t\tthis.touchCaptured = true;\n\t\t\t\t\tif( config.navigationMode === 'linear' ) {\n\t\t\t\t\t\tif( config.rtl ) {\n\t\t\t\t\t\t\tthis.Reveal.next();\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tthis.Reveal.prev();\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.left();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if( deltaX < -SWIPE_THRESHOLD && Math.abs( deltaX ) > Math.abs( deltaY ) ) {\n\t\t\t\t\tthis.touchCaptured = true;\n\t\t\t\t\tif( config.navigationMode === 'linear' ) {\n\t\t\t\t\t\tif( config.rtl ) {\n\t\t\t\t\t\t\tthis.Reveal.prev();\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tthis.Reveal.next();\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.right();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if( deltaY > SWIPE_THRESHOLD && availableRoutes.up ) {\n\t\t\t\t\tthis.touchCaptured = true;\n\t\t\t\t\tif( config.navigationMode === 'linear' ) {\n\t\t\t\t\t\tthis.Reveal.prev();\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.up();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if( deltaY < -SWIPE_THRESHOLD && availableRoutes.down ) {\n\t\t\t\t\tthis.touchCaptured = true;\n\t\t\t\t\tif( config.navigationMode === 'linear' ) {\n\t\t\t\t\t\tthis.Reveal.next();\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.down();\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// If we're embedded, only block touch events if they have\n\t\t\t\t// triggered an action\n\t\t\t\tif( config.embedded ) {\n\t\t\t\t\tif( this.touchCaptured || this.Reveal.isVerticalSlide() ) {\n\t\t\t\t\t\tevent.preventDefault();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t// Not embedded? Block them all to avoid needless tossing\n\t\t\t\t// around of the viewport in iOS\n\t\t\t\telse {\n\t\t\t\t\tevent.preventDefault();\n\t\t\t\t}\n\n\t\t\t}\n\t\t}\n\t\t// There's a bug with swiping on some Android devices unless\n\t\t// the default action is always prevented\n\t\telse if( isAndroid ) {\n\t\t\tevent.preventDefault();\n\t\t}\n\n\t}\n\n\t/**\n\t * Handler for the 'touchend' event.\n\t *\n\t * @param {object} event\n\t */\n\tonTouchEnd( event ) {\n\n\t\tthis.touchCaptured = false;\n\n\t}\n\n\t/**\n\t * Convert pointer down to touch start.\n\t *\n\t * @param {object} event\n\t */\n\tonPointerDown( event ) {\n\n\t\tif( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === \"touch\" ) {\n\t\t\tevent.touches = [{ clientX: event.clientX, clientY: event.clientY }];\n\t\t\tthis.onTouchStart( event );\n\t\t}\n\n\t}\n\n\t/**\n\t * Convert pointer move to touch move.\n\t *\n\t * @param {object} event\n\t */\n\tonPointerMove( event ) {\n\n\t\tif( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === \"touch\" ) {\n\t\t\tevent.touches = [{ clientX: event.clientX, clientY: event.clientY }];\n\t\t\tthis.onTouchMove( event );\n\t\t}\n\n\t}\n\n\t/**\n\t * Convert pointer up to touch end.\n\t *\n\t * @param {object} event\n\t */\n\tonPointerUp( event ) {\n\n\t\tif( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === \"touch\" ) {\n\t\t\tevent.touches = [{ clientX: event.clientX, clientY: event.clientY }];\n\t\t\tthis.onTouchEnd( event );\n\t\t}\n\n\t}\n\n}","import { closest } from '../utils/util.js'\n\n/**\n * Manages focus when a presentation is embedded. This\n * helps us only capture keyboard from the presentation\n * a user is currently interacting with in a page where\n * multiple presentations are embedded.\n */\n\nconst STATE_FOCUS = 'focus';\nconst STATE_BLUR = 'blur';\n\nexport default class Focus {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onRevealPointerDown = this.onRevealPointerDown.bind( this );\n\t\tthis.onDocumentPointerDown = this.onDocumentPointerDown.bind( this );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.embedded ) {\n\t\t\tthis.blur();\n\t\t}\n\t\telse {\n\t\t\tthis.focus();\n\t\t\tthis.unbind();\n\t\t}\n\n\t}\n\n\tbind() {\n\n\t\tif( this.Reveal.getConfig().embedded ) {\n\t\t\tthis.Reveal.getRevealElement().addEventListener( 'pointerdown', this.onRevealPointerDown, false );\n\t\t}\n\n\t}\n\n\tunbind() {\n\n\t\tthis.Reveal.getRevealElement().removeEventListener( 'pointerdown', this.onRevealPointerDown, false );\n\t\tdocument.removeEventListener( 'pointerdown', this.onDocumentPointerDown, false );\n\n\t}\n\n\tfocus() {\n\n\t\tif( this.state !== STATE_FOCUS ) {\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'focused' );\n\t\t\tdocument.addEventListener( 'pointerdown', this.onDocumentPointerDown, false );\n\t\t}\n\n\t\tthis.state = STATE_FOCUS;\n\n\t}\n\n\tblur() {\n\n\t\tif( this.state !== STATE_BLUR ) {\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'focused' );\n\t\t\tdocument.removeEventListener( 'pointerdown', this.onDocumentPointerDown, false );\n\t\t}\n\n\t\tthis.state = STATE_BLUR;\n\n\t}\n\n\tisFocused() {\n\n\t\treturn this.state === STATE_FOCUS;\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.Reveal.getRevealElement().classList.remove( 'focused' );\n\n\t}\n\n\tonRevealPointerDown( event ) {\n\n\t\tthis.focus();\n\n\t}\n\n\tonDocumentPointerDown( event ) {\n\n\t\tlet revealElement = closest( event.target, '.reveal' );\n\t\tif( !revealElement || revealElement !== this.Reveal.getRevealElement() ) {\n\t\t\tthis.blur();\n\t\t}\n\n\t}\n\n}","/**\n * Handles the showing of speaker notes\n */\nexport default class Notes {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'speaker-notes';\n\t\tthis.element.setAttribute( 'data-prevent-swipe', '' );\n\t\tthis.element.setAttribute( 'tabindex', '0' );\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.showNotes ) {\n\t\t\tthis.element.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Pick up notes from the current slide and display them\n\t * to the viewer.\n\t *\n\t * @see {@link config.showNotes}\n\t */\n\tupdate() {\n\n\t\tif( this.Reveal.getConfig().showNotes &&\n\t\t\tthis.element && this.Reveal.getCurrentSlide() &&\n\t\t\t!this.Reveal.isScrollView() &&\n\t\t\t!this.Reveal.isPrintView()\n\t\t) {\n\t\t\tthis.element.innerHTML = this.getSlideNotes() || '<span class=\"notes-placeholder\">No notes on this slide.</span>';\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates the visibility of the speaker notes sidebar that\n\t * is used to share annotated slides. The notes sidebar is\n\t * only visible if showNotes is true and there are notes on\n\t * one or more slides in the deck.\n\t */\n\tupdateVisibility() {\n\n\t\tif( this.Reveal.getConfig().showNotes &&\n\t\t\tthis.hasNotes() &&\n\t\t\t!this.Reveal.isScrollView() &&\n\t\t\t!this.Reveal.isPrintView()\n\t\t) {\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'show-notes' );\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'show-notes' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if there are speaker notes for ANY slide in the\n\t * presentation.\n\t */\n\thasNotes() {\n\n\t\treturn this.Reveal.getSlidesElement().querySelectorAll( '[data-notes], aside.notes' ).length > 0;\n\n\t}\n\n\t/**\n\t * Checks if this presentation is running inside of the\n\t * speaker notes window.\n\t *\n\t * @return {boolean}\n\t */\n\tisSpeakerNotesWindow() {\n\n\t\treturn !!window.location.search.match( /receiver/gi );\n\n\t}\n\n\t/**\n\t * Retrieves the speaker notes from a slide. Notes can be\n\t * defined in two ways:\n\t * 1. As a data-notes attribute on the slide <section>\n\t * 2. With <aside class=\"notes\"> elements inside the slide\n\t *\n\t * @param {HTMLElement} [slide=currentSlide]\n\t * @return {(string|null)}\n\t */\n\tgetSlideNotes( slide = this.Reveal.getCurrentSlide() ) {\n\n\t\t// Notes can be specified via the data-notes attribute...\n\t\tif( slide.hasAttribute( 'data-notes' ) ) {\n\t\t\treturn slide.getAttribute( 'data-notes' );\n\t\t}\n\n\t\t// ... or using <aside class=\"notes\"> elements\n\t\tlet notesElements = slide.querySelectorAll( 'aside.notes' );\n\t\tif( notesElements ) {\n\t\t\treturn Array.from(notesElements).map( notesElement => notesElement.innerHTML ).join( '\\n' );\n\t\t}\n\n\t\treturn null;\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}","/**\n * UI component that lets the use control auto-slide\n * playback via play/pause.\n */\nexport default class Playback {\n\n\t/**\n\t * @param {HTMLElement} container The component will append\n\t * itself to this\n\t * @param {function} progressCheck A method which will be\n\t * called frequently to get the current playback progress on\n\t * a range of 0-1\n\t */\n\tconstructor( container, progressCheck ) {\n\n\t\t// Cosmetics\n\t\tthis.diameter = 100;\n\t\tthis.diameter2 = this.diameter/2;\n\t\tthis.thickness = 6;\n\n\t\t// Flags if we are currently playing\n\t\tthis.playing = false;\n\n\t\t// Current progress on a 0-1 range\n\t\tthis.progress = 0;\n\n\t\t// Used to loop the animation smoothly\n\t\tthis.progressOffset = 1;\n\n\t\tthis.container = container;\n\t\tthis.progressCheck = progressCheck;\n\n\t\tthis.canvas = document.createElement( 'canvas' );\n\t\tthis.canvas.className = 'playback';\n\t\tthis.canvas.width = this.diameter;\n\t\tthis.canvas.height = this.diameter;\n\t\tthis.canvas.style.width = this.diameter2 + 'px';\n\t\tthis.canvas.style.height = this.diameter2 + 'px';\n\t\tthis.context = this.canvas.getContext( '2d' );\n\n\t\tthis.container.appendChild( this.canvas );\n\n\t\tthis.render();\n\n\t}\n\n\tsetPlaying( value ) {\n\n\t\tconst wasPlaying = this.playing;\n\n\t\tthis.playing = value;\n\n\t\t// Start repainting if we weren't already\n\t\tif( !wasPlaying && this.playing ) {\n\t\t\tthis.animate();\n\t\t}\n\t\telse {\n\t\t\tthis.render();\n\t\t}\n\n\t}\n\n\tanimate() {\n\n\t\tconst progressBefore = this.progress;\n\n\t\tthis.progress = this.progressCheck();\n\n\t\t// When we loop, offset the progress so that it eases\n\t\t// smoothly rather than immediately resetting\n\t\tif( progressBefore > 0.8 && this.progress < 0.2 ) {\n\t\t\tthis.progressOffset = this.progress;\n\t\t}\n\n\t\tthis.render();\n\n\t\tif( this.playing ) {\n\t\t\trequestAnimationFrame( this.animate.bind( this ) );\n\t\t}\n\n\t}\n\n\t/**\n\t * Renders the current progress and playback state.\n\t */\n\trender() {\n\n\t\tlet progress = this.playing ? this.progress : 0,\n\t\t\tradius = ( this.diameter2 ) - this.thickness,\n\t\t\tx = this.diameter2,\n\t\t\ty = this.diameter2,\n\t\t\ticonSize = 28;\n\n\t\t// Ease towards 1\n\t\tthis.progressOffset += ( 1 - this.progressOffset ) * 0.1;\n\n\t\tconst endAngle = ( - Math.PI / 2 ) + ( progress * ( Math.PI * 2 ) );\n\t\tconst startAngle = ( - Math.PI / 2 ) + ( this.progressOffset * ( Math.PI * 2 ) );\n\n\t\tthis.context.save();\n\t\tthis.context.clearRect( 0, 0, this.diameter, this.diameter );\n\n\t\t// Solid background color\n\t\tthis.context.beginPath();\n\t\tthis.context.arc( x, y, radius + 4, 0, Math.PI * 2, false );\n\t\tthis.context.fillStyle = 'rgba( 0, 0, 0, 0.4 )';\n\t\tthis.context.fill();\n\n\t\t// Draw progress track\n\t\tthis.context.beginPath();\n\t\tthis.context.arc( x, y, radius, 0, Math.PI * 2, false );\n\t\tthis.context.lineWidth = this.thickness;\n\t\tthis.context.strokeStyle = 'rgba( 255, 255, 255, 0.2 )';\n\t\tthis.context.stroke();\n\n\t\tif( this.playing ) {\n\t\t\t// Draw progress on top of track\n\t\t\tthis.context.beginPath();\n\t\t\tthis.context.arc( x, y, radius, startAngle, endAngle, false );\n\t\t\tthis.context.lineWidth = this.thickness;\n\t\t\tthis.context.strokeStyle = '#fff';\n\t\t\tthis.context.stroke();\n\t\t}\n\n\t\tthis.context.translate( x - ( iconSize / 2 ), y - ( iconSize / 2 ) );\n\n\t\t// Draw play/pause icons\n\t\tif( this.playing ) {\n\t\t\tthis.context.fillStyle = '#fff';\n\t\t\tthis.context.fillRect( 0, 0, iconSize / 2 - 4, iconSize );\n\t\t\tthis.context.fillRect( iconSize / 2 + 4, 0, iconSize / 2 - 4, iconSize );\n\t\t}\n\t\telse {\n\t\t\tthis.context.beginPath();\n\t\t\tthis.context.translate( 4, 0 );\n\t\t\tthis.context.moveTo( 0, 0 );\n\t\t\tthis.context.lineTo( iconSize - 4, iconSize / 2 );\n\t\t\tthis.context.lineTo( 0, iconSize );\n\t\t\tthis.context.fillStyle = '#fff';\n\t\t\tthis.context.fill();\n\t\t}\n\n\t\tthis.context.restore();\n\n\t}\n\n\ton( type, listener ) {\n\t\tthis.canvas.addEventListener( type, listener, false );\n\t}\n\n\toff( type, listener ) {\n\t\tthis.canvas.removeEventListener( type, listener, false );\n\t}\n\n\tdestroy() {\n\n\t\tthis.playing = false;\n\n\t\tif( this.canvas.parentNode ) {\n\t\t\tthis.container.removeChild( this.canvas );\n\t\t}\n\n\t}\n\n}","/**\n * The default reveal.js config object.\n */\nexport default {\n\n\t// The \"normal\" size of the presentation, aspect ratio will be preserved\n\t// when the presentation is scaled to fit different resolutions\n\twidth: 960,\n\theight: 700,\n\n\t// Factor of the display size that should remain empty around the content\n\tmargin: 0.04,\n\n\t// Bounds for smallest/largest possible scale to apply to content\n\tminScale: 0.2,\n\tmaxScale: 2.0,\n\n\t// Display presentation control arrows\n\tcontrols: true,\n\n\t// Help the user learn the controls by providing hints, for example by\n\t// bouncing the down arrow when they first encounter a vertical slide\n\tcontrolsTutorial: true,\n\n\t// Determines where controls appear, \"edges\" or \"bottom-right\"\n\tcontrolsLayout: 'bottom-right',\n\n\t// Visibility rule for backwards navigation arrows; \"faded\", \"hidden\"\n\t// or \"visible\"\n\tcontrolsBackArrows: 'faded',\n\n\t// Display a presentation progress bar\n\tprogress: true,\n\n\t// Display the page number of the current slide\n\t// - true: Show slide number\n\t// - false: Hide slide number\n\t//\n\t// Can optionally be set as a string that specifies the number formatting:\n\t// - \"h.v\":\t Horizontal . vertical slide number (default)\n\t// - \"h/v\":\t Horizontal / vertical slide number\n\t// - \"c\":\t Flattened slide number\n\t// - \"c/t\":\t Flattened slide number / total slides\n\t//\n\t// Alternatively, you can provide a function that returns the slide\n\t// number for the current slide. The function should take in a slide\n\t// object and return an array with one string [slideNumber] or\n\t// three strings [n1,delimiter,n2]. See #formatSlideNumber().\n\tslideNumber: false,\n\n\t// Can be used to limit the contexts in which the slide number appears\n\t// - \"all\": Always show the slide number\n\t// - \"print\": Only when printing to PDF\n\t// - \"speaker\": Only in the speaker view\n\tshowSlideNumber: 'all',\n\n\t// Use 1 based indexing for # links to match slide number (default is zero\n\t// based)\n\thashOneBasedIndex: false,\n\n\t// Add the current slide number to the URL hash so that reloading the\n\t// page/copying the URL will return you to the same slide\n\thash: false,\n\n\t// Flags if we should monitor the hash and change slides accordingly\n\trespondToHashChanges: true,\n\n\t// Enable support for jump-to-slide navigation shortcuts\n\tjumpToSlide: true,\n\n\t// Push each slide change to the browser history. Implies `hash: true`\n\thistory: false,\n\n\t// Enable keyboard shortcuts for navigation\n\tkeyboard: true,\n\n\t// Optional function that blocks keyboard events when retuning false\n\t//\n\t// If you set this to 'focused', we will only capture keyboard events\n\t// for embedded decks when they are in focus\n\tkeyboardCondition: null,\n\n\t// Disables the default reveal.js slide layout (scaling and centering)\n\t// so that you can use custom CSS layout\n\tdisableLayout: false,\n\n\t// Enable the slide overview mode\n\toverview: true,\n\n\t// Vertical centering of slides\n\tcenter: true,\n\n\t// Enables touch navigation on devices with touch input\n\ttouch: true,\n\n\t// Loop the presentation\n\tloop: false,\n\n\t// Change the presentation direction to be RTL\n\trtl: false,\n\n\t// Changes the behavior of our navigation directions.\n\t//\n\t// \"default\"\n\t// Left/right arrow keys step between horizontal slides, up/down\n\t// arrow keys step between vertical slides. Space key steps through\n\t// all slides (both horizontal and vertical).\n\t//\n\t// \"linear\"\n\t// Removes the up/down arrows. Left/right arrows step through all\n\t// slides (both horizontal and vertical).\n\t//\n\t// \"grid\"\n\t// When this is enabled, stepping left/right from a vertical stack\n\t// to an adjacent vertical stack will land you at the same vertical\n\t// index.\n\t//\n\t// Consider a deck with six slides ordered in two vertical stacks:\n\t// 1.1 2.1\n\t// 1.2 2.2\n\t// 1.3 2.3\n\t//\n\t// If you're on slide 1.3 and navigate right, you will normally move\n\t// from 1.3 -> 2.1. If \"grid\" is used, the same navigation takes you\n\t// from 1.3 -> 2.3.\n\tnavigationMode: 'default',\n\n\t// Randomizes the order of slides each time the presentation loads\n\tshuffle: false,\n\n\t// Turns fragments on and off globally\n\tfragments: true,\n\n\t// Flags whether to include the current fragment in the URL,\n\t// so that reloading brings you to the same fragment position\n\tfragmentInURL: true,\n\n\t// Flags if the presentation is running in an embedded mode,\n\t// i.e. contained within a limited portion of the screen\n\tembedded: false,\n\n\t// Flags if we should show a help overlay when the question-mark\n\t// key is pressed\n\thelp: true,\n\n\t// Flags if it should be possible to pause the presentation (blackout)\n\tpause: true,\n\n\t// Flags if speaker notes should be visible to all viewers\n\tshowNotes: false,\n\n\t// Flags if slides with data-visibility=\"hidden\" should be kep visible\n\tshowHiddenSlides: false,\n\n\t// Global override for autoplaying embedded media (video/audio/iframe)\n\t// - null: Media will only autoplay if data-autoplay is present\n\t// - true: All media will autoplay, regardless of individual setting\n\t// - false: No media will autoplay, regardless of individual setting\n\tautoPlayMedia: null,\n\n\t// Global override for preloading lazy-loaded iframes\n\t// - null: Iframes with data-src AND data-preload will be loaded when within\n\t// the viewDistance, iframes with only data-src will be loaded when visible\n\t// - true: All iframes with data-src will be loaded when within the viewDistance\n\t// - false: All iframes with data-src will be loaded only when visible\n\tpreloadIframes: null,\n\n\t// Can be used to globally disable auto-animation\n\tautoAnimate: true,\n\n\t// Optionally provide a custom element matcher that will be\n\t// used to dictate which elements we can animate between.\n\tautoAnimateMatcher: null,\n\n\t// Default settings for our auto-animate transitions, can be\n\t// overridden per-slide or per-element via data arguments\n\tautoAnimateEasing: 'ease',\n\tautoAnimateDuration: 1.0,\n\tautoAnimateUnmatched: true,\n\n\t// CSS properties that can be auto-animated. Position & scale\n\t// is matched separately so there's no need to include styles\n\t// like top/right/bottom/left, width/height or margin.\n\tautoAnimateStyles: [\n\t\t'opacity',\n\t\t'color',\n\t\t'background-color',\n\t\t'padding',\n\t\t'font-size',\n\t\t'line-height',\n\t\t'letter-spacing',\n\t\t'border-width',\n\t\t'border-color',\n\t\t'border-radius',\n\t\t'outline',\n\t\t'outline-offset'\n\t],\n\n\t// Controls automatic progression to the next slide\n\t// - 0: Auto-sliding only happens if the data-autoslide HTML attribute\n\t// is present on the current slide or fragment\n\t// - 1+: All slides will progress automatically at the given interval\n\t// - false: No auto-sliding, even if data-autoslide is present\n\tautoSlide: 0,\n\n\t// Stop auto-sliding after user input\n\tautoSlideStoppable: true,\n\n\t// Use this method for navigation when auto-sliding (defaults to navigateNext)\n\tautoSlideMethod: null,\n\n\t// Specify the average time in seconds that you think you will spend\n\t// presenting each slide. This is used to show a pacing timer in the\n\t// speaker view\n\tdefaultTiming: null,\n\n\t// Enable slide navigation via mouse wheel\n\tmouseWheel: false,\n\n\t// Opens links in an iframe preview overlay\n\t// Add `data-preview-link` and `data-preview-link=\"false\"` to customise each link\n\t// individually\n\tpreviewLinks: false,\n\n\t// Exposes the reveal.js API through window.postMessage\n\tpostMessage: true,\n\n\t// Dispatches all reveal.js events to the parent window through postMessage\n\tpostMessageEvents: false,\n\n\t// Focuses body when page changes visibility to ensure keyboard shortcuts work\n\tfocusBodyOnPageVisibilityChange: true,\n\n\t// Transition style\n\ttransition: 'slide', // none/fade/slide/convex/concave/zoom\n\n\t// Transition speed\n\ttransitionSpeed: 'default', // default/fast/slow\n\n\t// Transition style for full page slide backgrounds\n\tbackgroundTransition: 'fade', // none/fade/slide/convex/concave/zoom\n\n\t// Parallax background image\n\tparallaxBackgroundImage: '', // CSS syntax, e.g. \"a.jpg\"\n\n\t// Parallax background size\n\tparallaxBackgroundSize: '', // CSS syntax, e.g. \"3000px 2000px\"\n\n\t// Parallax background repeat\n\tparallaxBackgroundRepeat: '', // repeat/repeat-x/repeat-y/no-repeat/initial/inherit\n\n\t// Parallax background position\n\tparallaxBackgroundPosition: '', // CSS syntax, e.g. \"top left\"\n\n\t// Amount of pixels to move the parallax background per slide step\n\tparallaxBackgroundHorizontal: null,\n\tparallaxBackgroundVertical: null,\n\n\t// Can be used to initialize reveal.js in one of the following views:\n\t// - print: Render the presentation so that it can be printed to PDF\n\t// - scroll: Show the presentation as a tall scrollable page with scroll\n\t// triggered animations\n\tview: null,\n\n\t// Adjusts the height of each slide in the scroll view.\n\t// - full: Each slide is as tall as the viewport\n\t// - compact: Slides are as small as possible, allowing multiple slides\n\t// to be visible in parallel on tall devices\n\tscrollLayout: 'full',\n\n\t// Control how scroll snapping works in the scroll view.\n\t// - false: \tNo snapping, scrolling is continuous\n\t// - proximity: Snap when close to a slide\n\t// - mandatory: Always snap to the closest slide\n\t//\n\t// Only applies to presentations in scroll view.\n\tscrollSnap: 'mandatory',\n\n\t// Enables and configure the scroll view progress bar.\n\t// - 'auto': Show the scrollbar while scrolling, hide while idle\n\t// - true: Always show the scrollbar\n\t// - false: Never show the scrollbar\n\tscrollProgress: 'auto',\n\n\t// Automatically activate the scroll view when we the viewport falls\n\t// below the given width.\n\tscrollActivationWidth: 435,\n\n\t// The maximum number of pages a single slide can expand onto when printing\n\t// to PDF, unlimited by default\n\tpdfMaxPagesPerSlide: Number.POSITIVE_INFINITY,\n\n\t// Prints each fragment on a separate slide\n\tpdfSeparateFragments: true,\n\n\t// Offset used to reduce the height of content within exported PDF pages.\n\t// This exists to account for environment differences based on how you\n\t// print to PDF. CLI printing options, like phantomjs and wkpdf, can end\n\t// on precisely the total height of the document whereas in-browser\n\t// printing has to end one pixel before.\n\tpdfPageHeightOffset: -1,\n\n\t// Number of slides away from the current that are visible\n\tviewDistance: 3,\n\n\t// Number of slides away from the current that are visible on mobile\n\t// devices. It is advisable to set this to a lower number than\n\t// viewDistance in order to save resources.\n\tmobileViewDistance: 2,\n\n\t// The display mode that will be used to show slides\n\tdisplay: 'block',\n\n\t// Hide cursor if inactive\n\thideInactiveCursor: true,\n\n\t// Time before the cursor is hidden (in ms)\n\thideCursorTime: 5000,\n\n\t// Should we automatically sort and set indices for fragments\n\t// at each sync? (See Reveal.sync)\n\tsortFragmentsOnSync: true,\n\n\t// Script dependencies to load\n\tdependencies: [],\n\n\t// Plugin objects to register and use for this presentation\n\tplugins: []\n\n}","import SlideContent from './controllers/slidecontent.js'\nimport SlideNumber from './controllers/slidenumber.js'\nimport JumpToSlide from './controllers/jumptoslide.js'\nimport Backgrounds from './controllers/backgrounds.js'\nimport AutoAnimate from './controllers/autoanimate.js'\nimport ScrollView from './controllers/scrollview.js'\nimport PrintView from './controllers/printview.js'\nimport Fragments from './controllers/fragments.js'\nimport Overview from './controllers/overview.js'\nimport Keyboard from './controllers/keyboard.js'\nimport Location from './controllers/location.js'\nimport Controls from './controllers/controls.js'\nimport Progress from './controllers/progress.js'\nimport Pointer from './controllers/pointer.js'\nimport Plugins from './controllers/plugins.js'\nimport Touch from './controllers/touch.js'\nimport Focus from './controllers/focus.js'\nimport Notes from './controllers/notes.js'\nimport Playback from './components/playback.js'\nimport defaultConfig from './config.js'\nimport * as Util from './utils/util.js'\nimport * as Device from './utils/device.js'\nimport {\n\tSLIDES_SELECTOR,\n\tHORIZONTAL_SLIDES_SELECTOR,\n\tVERTICAL_SLIDES_SELECTOR,\n\tPOST_MESSAGE_METHOD_BLACKLIST\n} from './utils/constants.js'\n\n// The reveal.js version\nexport const VERSION = '5.1.0';\n\n/**\n * reveal.js\n * https://revealjs.com\n * MIT licensed\n *\n * Copyright (C) 2011-2022 Hakim El Hattab, https://hakim.se\n */\nexport default function( revealElement, options ) {\n\n\t// Support initialization with no args, one arg\n\t// [options] or two args [revealElement, options]\n\tif( arguments.length < 2 ) {\n\t\toptions = arguments[0];\n\t\trevealElement = document.querySelector( '.reveal' );\n\t}\n\n\tconst Reveal = {};\n\n\t// Configuration defaults, can be overridden at initialization time\n\tlet config = {},\n\n\t\t// Flags if initialize() has been invoked for this reveal instance\n\t\tinitialized = false,\n\n\t\t// Flags if reveal.js is loaded (has dispatched the 'ready' event)\n\t\tready = false,\n\n\t\t// The horizontal and vertical index of the currently active slide\n\t\tindexh,\n\t\tindexv,\n\n\t\t// The previous and current slide HTML elements\n\t\tpreviousSlide,\n\t\tcurrentSlide,\n\n\t\t// Remember which directions that the user has navigated towards\n\t\tnavigationHistory = {\n\t\t\thasNavigatedHorizontally: false,\n\t\t\thasNavigatedVertically: false\n\t\t},\n\n\t\t// Slides may have a data-state attribute which we pick up and apply\n\t\t// as a class to the body. This list contains the combined state of\n\t\t// all current slides.\n\t\tstate = [],\n\n\t\t// The current scale of the presentation (see width/height config)\n\t\tscale = 1,\n\n\t\t// CSS transform that is currently applied to the slides container,\n\t\t// split into two groups\n\t\tslidesTransform = { layout: '', overview: '' },\n\n\t\t// Cached references to DOM elements\n\t\tdom = {},\n\n\t\t// Flags if the interaction event listeners are bound\n\t\teventsAreBound = false,\n\n\t\t// The current slide transition state; idle or running\n\t\ttransition = 'idle',\n\n\t\t// The current auto-slide duration\n\t\tautoSlide = 0,\n\n\t\t// Auto slide properties\n\t\tautoSlidePlayer,\n\t\tautoSlideTimeout = 0,\n\t\tautoSlideStartTime = -1,\n\t\tautoSlidePaused = false,\n\n\t\t// Controllers for different aspects of our presentation. They're\n\t\t// all given direct references to this Reveal instance since there\n\t\t// may be multiple presentations running in parallel.\n\t\tslideContent = new SlideContent( Reveal ),\n\t\tslideNumber = new SlideNumber( Reveal ),\n\t\tjumpToSlide = new JumpToSlide( Reveal ),\n\t\tautoAnimate = new AutoAnimate( Reveal ),\n\t\tbackgrounds = new Backgrounds( Reveal ),\n\t\tscrollView = new ScrollView( Reveal ),\n\t\tprintView = new PrintView( Reveal ),\n\t\tfragments = new Fragments( Reveal ),\n\t\toverview = new Overview( Reveal ),\n\t\tkeyboard = new Keyboard( Reveal ),\n\t\tlocation = new Location( Reveal ),\n\t\tcontrols = new Controls( Reveal ),\n\t\tprogress = new Progress( Reveal ),\n\t\tpointer = new Pointer( Reveal ),\n\t\tplugins = new Plugins( Reveal ),\n\t\tfocus = new Focus( Reveal ),\n\t\ttouch = new Touch( Reveal ),\n\t\tnotes = new Notes( Reveal );\n\n\t/**\n\t * Starts up the presentation.\n\t */\n\tfunction initialize( initOptions ) {\n\n\t\tif( !revealElement ) throw 'Unable to find presentation root (<div class=\"reveal\">).';\n\n\t\tinitialized = true;\n\n\t\t// Cache references to key DOM elements\n\t\tdom.wrapper = revealElement;\n\t\tdom.slides = revealElement.querySelector( '.slides' );\n\n\t\tif( !dom.slides ) throw 'Unable to find slides container (<div class=\"slides\">).';\n\n\t\t// Compose our config object in order of increasing precedence:\n\t\t// 1. Default reveal.js options\n\t\t// 2. Options provided via Reveal.configure() prior to\n\t\t// initialization\n\t\t// 3. Options passed to the Reveal constructor\n\t\t// 4. Options passed to Reveal.initialize\n\t\t// 5. Query params\n\t\tconfig = { ...defaultConfig, ...config, ...options, ...initOptions, ...Util.getQueryHash() };\n\n\t\t// Legacy support for the ?print-pdf query\n\t\tif( /print-pdf/gi.test( window.location.search ) ) {\n\t\t\tconfig.view = 'print';\n\t\t}\n\n\t\tsetViewport();\n\n\t\t// Force a layout when the whole page, incl fonts, has loaded\n\t\twindow.addEventListener( 'load', layout, false );\n\n\t\t// Register plugins and load dependencies, then move on to #start()\n\t\tplugins.load( config.plugins, config.dependencies ).then( start );\n\n\t\treturn new Promise( resolve => Reveal.on( 'ready', resolve ) );\n\n\t}\n\n\t/**\n\t * Encase the presentation in a reveal.js viewport. The\n\t * extent of the viewport differs based on configuration.\n\t */\n\tfunction setViewport() {\n\n\t\t// Embedded decks use the reveal element as their viewport\n\t\tif( config.embedded === true ) {\n\t\t\tdom.viewport = Util.closest( revealElement, '.reveal-viewport' ) || revealElement;\n\t\t}\n\t\t// Full-page decks use the body as their viewport\n\t\telse {\n\t\t\tdom.viewport = document.body;\n\t\t\tdocument.documentElement.classList.add( 'reveal-full-page' );\n\t\t}\n\n\t\tdom.viewport.classList.add( 'reveal-viewport' );\n\n\t}\n\n\t/**\n\t * Starts up reveal.js by binding input events and navigating\n\t * to the current URL deeplink if there is one.\n\t */\n\tfunction start() {\n\n\t\tready = true;\n\n\t\t// Remove slides hidden with data-visibility\n\t\tremoveHiddenSlides();\n\n\t\t// Make sure we've got all the DOM elements we need\n\t\tsetupDOM();\n\n\t\t// Listen to messages posted to this window\n\t\tsetupPostMessage();\n\n\t\t// Prevent the slides from being scrolled out of view\n\t\tsetupScrollPrevention();\n\n\t\t// Adds bindings for fullscreen mode\n\t\tsetupFullscreen();\n\n\t\t// Resets all vertical slides so that only the first is visible\n\t\tresetVerticalSlides();\n\n\t\t// Updates the presentation to match the current configuration values\n\t\tconfigure();\n\n\t\t// Create slide backgrounds\n\t\tbackgrounds.update( true );\n\n\t\t// Activate the print/scroll view if configured\n\t\tactivateInitialView();\n\n\t\t// Read the initial hash\n\t\tlocation.readURL();\n\n\t\t// Notify listeners that the presentation is ready but use a 1ms\n\t\t// timeout to ensure it's not fired synchronously after #initialize()\n\t\tsetTimeout( () => {\n\t\t\t// Enable transitions now that we're loaded\n\t\t\tdom.slides.classList.remove( 'no-transition' );\n\n\t\t\tdom.wrapper.classList.add( 'ready' );\n\n\t\t\tdispatchEvent({\n\t\t\t\ttype: 'ready',\n\t\t\t\tdata: {\n\t\t\t\t\tindexh,\n\t\t\t\t\tindexv,\n\t\t\t\t\tcurrentSlide\n\t\t\t\t}\n\t\t\t});\n\t\t}, 1 );\n\n\t}\n\n\t/**\n\t * Activates the correct reveal.js view based on our config.\n\t * This is only invoked once during initialization.\n\t */\n\tfunction activateInitialView() {\n\n\t\tconst activatePrintView = config.view === 'print';\n\t\tconst activateScrollView = config.view === 'scroll' || config.view === 'reader';\n\n\t\tif( activatePrintView || activateScrollView ) {\n\n\t\t\tif( activatePrintView ) {\n\t\t\t\tremoveEventListeners();\n\t\t\t}\n\t\t\telse {\n\t\t\t\ttouch.unbind();\n\t\t\t}\n\n\t\t\t// Avoid content flickering during layout\n\t\t\tdom.viewport.classList.add( 'loading-scroll-mode' );\n\n\t\t\tif( activatePrintView ) {\n\t\t\t\t// The document needs to have loaded for the PDF layout\n\t\t\t\t// measurements to be accurate\n\t\t\t\tif( document.readyState === 'complete' ) {\n\t\t\t\t\tprintView.activate();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\twindow.addEventListener( 'load', () => printView.activate() );\n\t\t\t\t}\n\t\t\t}\n\t\t\telse {\n\t\t\t\tscrollView.activate();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Removes all slides with data-visibility=\"hidden\". This\n\t * is done right before the rest of the presentation is\n\t * initialized.\n\t *\n\t * If you want to show all hidden slides, initialize\n\t * reveal.js with showHiddenSlides set to true.\n\t */\n\tfunction removeHiddenSlides() {\n\n\t\tif( !config.showHiddenSlides ) {\n\t\t\tUtil.queryAll( dom.wrapper, 'section[data-visibility=\"hidden\"]' ).forEach( slide => {\n\t\t\t\tconst parent = slide.parentNode;\n\n\t\t\t\t// If this slide is part of a stack and that stack will be\n\t\t\t\t// empty after removing the hidden slide, remove the entire\n\t\t\t\t// stack\n\t\t\t\tif( parent.childElementCount === 1 && /section/i.test( parent.nodeName ) ) {\n\t\t\t\t\tparent.remove();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tslide.remove();\n\t\t\t\t}\n\n\t\t\t} );\n\t\t}\n\n\t}\n\n\t/**\n\t * Finds and stores references to DOM elements which are\n\t * required by the presentation. If a required element is\n\t * not found, it is created.\n\t */\n\tfunction setupDOM() {\n\n\t\t// Prevent transitions while we're loading\n\t\tdom.slides.classList.add( 'no-transition' );\n\n\t\tif( Device.isMobile ) {\n\t\t\tdom.wrapper.classList.add( 'no-hover' );\n\t\t}\n\t\telse {\n\t\t\tdom.wrapper.classList.remove( 'no-hover' );\n\t\t}\n\n\t\tbackgrounds.render();\n\t\tslideNumber.render();\n\t\tjumpToSlide.render();\n\t\tcontrols.render();\n\t\tprogress.render();\n\t\tnotes.render();\n\n\t\t// Overlay graphic which is displayed during the paused mode\n\t\tdom.pauseOverlay = Util.createSingletonNode( dom.wrapper, 'div', 'pause-overlay', config.controls ? '<button class=\"resume-button\">Resume presentation</button>' : null );\n\n\t\tdom.statusElement = createStatusElement();\n\n\t\tdom.wrapper.setAttribute( 'role', 'application' );\n\t}\n\n\t/**\n\t * Creates a hidden div with role aria-live to announce the\n\t * current slide content. Hide the div off-screen to make it\n\t * available only to Assistive Technologies.\n\t *\n\t * @return {HTMLElement}\n\t */\n\tfunction createStatusElement() {\n\n\t\tlet statusElement = dom.wrapper.querySelector( '.aria-status' );\n\t\tif( !statusElement ) {\n\t\t\tstatusElement = document.createElement( 'div' );\n\t\t\tstatusElement.style.position = 'absolute';\n\t\t\tstatusElement.style.height = '1px';\n\t\t\tstatusElement.style.width = '1px';\n\t\t\tstatusElement.style.overflow = 'hidden';\n\t\t\tstatusElement.style.clip = 'rect( 1px, 1px, 1px, 1px )';\n\t\t\tstatusElement.classList.add( 'aria-status' );\n\t\t\tstatusElement.setAttribute( 'aria-live', 'polite' );\n\t\t\tstatusElement.setAttribute( 'aria-atomic','true' );\n\t\t\tdom.wrapper.appendChild( statusElement );\n\t\t}\n\t\treturn statusElement;\n\n\t}\n\n\t/**\n\t * Announces the given text to screen readers.\n\t */\n\tfunction announceStatus( value ) {\n\n\t\tdom.statusElement.textContent = value;\n\n\t}\n\n\t/**\n\t * Converts the given HTML element into a string of text\n\t * that can be announced to a screen reader. Hidden\n\t * elements are excluded.\n\t */\n\tfunction getStatusText( node ) {\n\n\t\tlet text = '';\n\n\t\t// Text node\n\t\tif( node.nodeType === 3 ) {\n\t\t\ttext += node.textContent;\n\t\t}\n\t\t// Element node\n\t\telse if( node.nodeType === 1 ) {\n\n\t\t\tlet isAriaHidden = node.getAttribute( 'aria-hidden' );\n\t\t\tlet isDisplayHidden = window.getComputedStyle( node )['display'] === 'none';\n\t\t\tif( isAriaHidden !== 'true' && !isDisplayHidden ) {\n\n\t\t\t\tArray.from( node.childNodes ).forEach( child => {\n\t\t\t\t\ttext += getStatusText( child );\n\t\t\t\t} );\n\n\t\t\t}\n\n\t\t}\n\n\t\ttext = text.trim();\n\n\t\treturn text === '' ? '' : text + ' ';\n\n\t}\n\n\t/**\n\t * This is an unfortunate necessity. Some actions – such as\n\t * an input field being focused in an iframe or using the\n\t * keyboard to expand text selection beyond the bounds of\n\t * a slide – can trigger our content to be pushed out of view.\n\t * This scrolling can not be prevented by hiding overflow in\n\t * CSS (we already do) so we have to resort to repeatedly\n\t * checking if the slides have been offset :(\n\t */\n\tfunction setupScrollPrevention() {\n\n\t\tsetInterval( () => {\n\t\t\tif( !scrollView.isActive() && dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {\n\t\t\t\tdom.wrapper.scrollTop = 0;\n\t\t\t\tdom.wrapper.scrollLeft = 0;\n\t\t\t}\n\t\t}, 1000 );\n\n\t}\n\n\t/**\n\t * After entering fullscreen we need to force a layout to\n\t * get our presentations to scale correctly. This behavior\n\t * is inconsistent across browsers but a force layout seems\n\t * to normalize it.\n\t */\n\tfunction setupFullscreen() {\n\n\t\tdocument.addEventListener( 'fullscreenchange', onFullscreenChange );\n\t\tdocument.addEventListener( 'webkitfullscreenchange', onFullscreenChange );\n\n\t}\n\n\t/**\n\t * Registers a listener to postMessage events, this makes it\n\t * possible to call all reveal.js API methods from another\n\t * window. For example:\n\t *\n\t * revealWindow.postMessage( JSON.stringify({\n\t * method: 'slide',\n\t * args: [ 2 ]\n\t * }), '*' );\n\t */\n\tfunction setupPostMessage() {\n\n\t\tif( config.postMessage ) {\n\t\t\twindow.addEventListener( 'message', onPostMessage, false );\n\t\t}\n\n\t}\n\n\t/**\n\t * Applies the configuration settings from the config\n\t * object. May be called multiple times.\n\t *\n\t * @param {object} options\n\t */\n\tfunction configure( options ) {\n\n\t\tconst oldConfig = { ...config }\n\n\t\t// New config options may be passed when this method\n\t\t// is invoked through the API after initialization\n\t\tif( typeof options === 'object' ) Util.extend( config, options );\n\n\t\t// Abort if reveal.js hasn't finished loading, config\n\t\t// changes will be applied automatically once ready\n\t\tif( Reveal.isReady() === false ) return;\n\n\t\tconst numberOfSlides = dom.wrapper.querySelectorAll( SLIDES_SELECTOR ).length;\n\n\t\t// The transition is added as a class on the .reveal element\n\t\tdom.wrapper.classList.remove( oldConfig.transition );\n\t\tdom.wrapper.classList.add( config.transition );\n\n\t\tdom.wrapper.setAttribute( 'data-transition-speed', config.transitionSpeed );\n\t\tdom.wrapper.setAttribute( 'data-background-transition', config.backgroundTransition );\n\n\t\t// Expose our configured slide dimensions as custom props\n\t\tdom.viewport.style.setProperty( '--slide-width', typeof config.width === 'string' ? config.width : config.width + 'px' );\n\t\tdom.viewport.style.setProperty( '--slide-height', typeof config.height === 'string' ? config.height : config.height + 'px' );\n\n\t\tif( config.shuffle ) {\n\t\t\tshuffle();\n\t\t}\n\n\t\tUtil.toggleClass( dom.wrapper, 'embedded', config.embedded );\n\t\tUtil.toggleClass( dom.wrapper, 'rtl', config.rtl );\n\t\tUtil.toggleClass( dom.wrapper, 'center', config.center );\n\n\t\t// Exit the paused mode if it was configured off\n\t\tif( config.pause === false ) {\n\t\t\tresume();\n\t\t}\n\n\t\t// Iframe link previews\n\t\tif( config.previewLinks ) {\n\t\t\tenablePreviewLinks();\n\t\t\tdisablePreviewLinks( '[data-preview-link=false]' );\n\t\t}\n\t\telse {\n\t\t\tdisablePreviewLinks();\n\t\t\tenablePreviewLinks( '[data-preview-link]:not([data-preview-link=false])' );\n\t\t}\n\n\t\t// Reset all changes made by auto-animations\n\t\tautoAnimate.reset();\n\n\t\t// Remove existing auto-slide controls\n\t\tif( autoSlidePlayer ) {\n\t\t\tautoSlidePlayer.destroy();\n\t\t\tautoSlidePlayer = null;\n\t\t}\n\n\t\t// Generate auto-slide controls if needed\n\t\tif( numberOfSlides > 1 && config.autoSlide && config.autoSlideStoppable ) {\n\t\t\tautoSlidePlayer = new Playback( dom.wrapper, () => {\n\t\t\t\treturn Math.min( Math.max( ( Date.now() - autoSlideStartTime ) / autoSlide, 0 ), 1 );\n\t\t\t} );\n\n\t\t\tautoSlidePlayer.on( 'click', onAutoSlidePlayerClick );\n\t\t\tautoSlidePaused = false;\n\t\t}\n\n\t\t// Add the navigation mode to the DOM so we can adjust styling\n\t\tif( config.navigationMode !== 'default' ) {\n\t\t\tdom.wrapper.setAttribute( 'data-navigation-mode', config.navigationMode );\n\t\t}\n\t\telse {\n\t\t\tdom.wrapper.removeAttribute( 'data-navigation-mode' );\n\t\t}\n\n\t\tnotes.configure( config, oldConfig );\n\t\tfocus.configure( config, oldConfig );\n\t\tpointer.configure( config, oldConfig );\n\t\tcontrols.configure( config, oldConfig );\n\t\tprogress.configure( config, oldConfig );\n\t\tkeyboard.configure( config, oldConfig );\n\t\tfragments.configure( config, oldConfig );\n\t\tslideNumber.configure( config, oldConfig );\n\n\t\tsync();\n\n\t}\n\n\t/**\n\t * Binds all event listeners.\n\t */\n\tfunction addEventListeners() {\n\n\t\teventsAreBound = true;\n\n\t\twindow.addEventListener( 'resize', onWindowResize, false );\n\n\t\tif( config.touch ) touch.bind();\n\t\tif( config.keyboard ) keyboard.bind();\n\t\tif( config.progress ) progress.bind();\n\t\tif( config.respondToHashChanges ) location.bind();\n\t\tcontrols.bind();\n\t\tfocus.bind();\n\n\t\tdom.slides.addEventListener( 'click', onSlidesClicked, false );\n\t\tdom.slides.addEventListener( 'transitionend', onTransitionEnd, false );\n\t\tdom.pauseOverlay.addEventListener( 'click', resume, false );\n\n\t\tif( config.focusBodyOnPageVisibilityChange ) {\n\t\t\tdocument.addEventListener( 'visibilitychange', onPageVisibilityChange, false );\n\t\t}\n\n\t}\n\n\t/**\n\t * Unbinds all event listeners.\n\t */\n\tfunction removeEventListeners() {\n\n\t\teventsAreBound = false;\n\n\t\ttouch.unbind();\n\t\tfocus.unbind();\n\t\tkeyboard.unbind();\n\t\tcontrols.unbind();\n\t\tprogress.unbind();\n\t\tlocation.unbind();\n\n\t\twindow.removeEventListener( 'resize', onWindowResize, false );\n\n\t\tdom.slides.removeEventListener( 'click', onSlidesClicked, false );\n\t\tdom.slides.removeEventListener( 'transitionend', onTransitionEnd, false );\n\t\tdom.pauseOverlay.removeEventListener( 'click', resume, false );\n\n\t}\n\n\t/**\n\t * Uninitializes reveal.js by undoing changes made to the\n\t * DOM and removing all event listeners.\n\t */\n\tfunction destroy() {\n\n\t\t// There's nothing to destroy if this instance hasn't been\n\t\t// initialized yet\n\t\tif( initialized === false ) return;\n\n\t\tremoveEventListeners();\n\t\tcancelAutoSlide();\n\t\tdisablePreviewLinks();\n\n\t\t// Destroy controllers\n\t\tnotes.destroy();\n\t\tfocus.destroy();\n\t\tplugins.destroy();\n\t\tpointer.destroy();\n\t\tcontrols.destroy();\n\t\tprogress.destroy();\n\t\tbackgrounds.destroy();\n\t\tslideNumber.destroy();\n\t\tjumpToSlide.destroy();\n\n\t\t// Remove event listeners\n\t\tdocument.removeEventListener( 'fullscreenchange', onFullscreenChange );\n\t\tdocument.removeEventListener( 'webkitfullscreenchange', onFullscreenChange );\n\t\tdocument.removeEventListener( 'visibilitychange', onPageVisibilityChange, false );\n\t\twindow.removeEventListener( 'message', onPostMessage, false );\n\t\twindow.removeEventListener( 'load', layout, false );\n\n\t\t// Undo DOM changes\n\t\tif( dom.pauseOverlay ) dom.pauseOverlay.remove();\n\t\tif( dom.statusElement ) dom.statusElement.remove();\n\n\t\tdocument.documentElement.classList.remove( 'reveal-full-page' );\n\n\t\tdom.wrapper.classList.remove( 'ready', 'center', 'has-horizontal-slides', 'has-vertical-slides' );\n\t\tdom.wrapper.removeAttribute( 'data-transition-speed' );\n\t\tdom.wrapper.removeAttribute( 'data-background-transition' );\n\n\t\tdom.viewport.classList.remove( 'reveal-viewport' );\n\t\tdom.viewport.style.removeProperty( '--slide-width' );\n\t\tdom.viewport.style.removeProperty( '--slide-height' );\n\n\t\tdom.slides.style.removeProperty( 'width' );\n\t\tdom.slides.style.removeProperty( 'height' );\n\t\tdom.slides.style.removeProperty( 'zoom' );\n\t\tdom.slides.style.removeProperty( 'left' );\n\t\tdom.slides.style.removeProperty( 'top' );\n\t\tdom.slides.style.removeProperty( 'bottom' );\n\t\tdom.slides.style.removeProperty( 'right' );\n\t\tdom.slides.style.removeProperty( 'transform' );\n\n\t\tArray.from( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( slide => {\n\t\t\tslide.style.removeProperty( 'display' );\n\t\t\tslide.style.removeProperty( 'top' );\n\t\t\tslide.removeAttribute( 'hidden' );\n\t\t\tslide.removeAttribute( 'aria-hidden' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Adds a listener to one of our custom reveal.js events,\n\t * like slidechanged.\n\t */\n\tfunction on( type, listener, useCapture ) {\n\n\t\trevealElement.addEventListener( type, listener, useCapture );\n\n\t}\n\n\t/**\n\t * Unsubscribes from a reveal.js event.\n\t */\n\tfunction off( type, listener, useCapture ) {\n\n\t\trevealElement.removeEventListener( type, listener, useCapture );\n\n\t}\n\n\t/**\n\t * Applies CSS transforms to the slides container. The container\n\t * is transformed from two separate sources: layout and the overview\n\t * mode.\n\t *\n\t * @param {object} transforms\n\t */\n\tfunction transformSlides( transforms ) {\n\n\t\t// Pick up new transforms from arguments\n\t\tif( typeof transforms.layout === 'string' ) slidesTransform.layout = transforms.layout;\n\t\tif( typeof transforms.overview === 'string' ) slidesTransform.overview = transforms.overview;\n\n\t\t// Apply the transforms to the slides container\n\t\tif( slidesTransform.layout ) {\n\t\t\tUtil.transformElement( dom.slides, slidesTransform.layout + ' ' + slidesTransform.overview );\n\t\t}\n\t\telse {\n\t\t\tUtil.transformElement( dom.slides, slidesTransform.overview );\n\t\t}\n\n\t}\n\n\t/**\n\t * Dispatches an event of the specified type from the\n\t * reveal DOM element.\n\t */\n\tfunction dispatchEvent({ target=dom.wrapper, type, data, bubbles=true }) {\n\n\t\tlet event = document.createEvent( 'HTMLEvents', 1, 2 );\n\t\tevent.initEvent( type, bubbles, true );\n\t\tUtil.extend( event, data );\n\t\ttarget.dispatchEvent( event );\n\n\t\tif( target === dom.wrapper ) {\n\t\t\t// If we're in an iframe, post each reveal.js event to the\n\t\t\t// parent window. Used by the notes plugin\n\t\t\tdispatchPostMessage( type );\n\t\t}\n\n\t\treturn event;\n\n\t}\n\n\t/**\n\t * Dispatches a slidechanged event.\n\t *\n\t * @param {string} origin Used to identify multiplex clients\n\t */\n\tfunction dispatchSlideChanged( origin ) {\n\n\t\tdispatchEvent({\n\t\t\ttype: 'slidechanged',\n\t\t\tdata: {\n\t\t\t\tindexh,\n\t\t\t\tindexv,\n\t\t\t\tpreviousSlide,\n\t\t\t\tcurrentSlide,\n\t\t\t\torigin\n\t\t\t}\n\t\t});\n\n\t}\n\n\t/**\n\t * Dispatched a postMessage of the given type from our window.\n\t */\n\tfunction dispatchPostMessage( type, data ) {\n\n\t\tif( config.postMessageEvents && window.parent !== window.self ) {\n\t\t\tlet message = {\n\t\t\t\tnamespace: 'reveal',\n\t\t\t\teventName: type,\n\t\t\t\tstate: getState()\n\t\t\t};\n\n\t\t\tUtil.extend( message, data );\n\n\t\t\twindow.parent.postMessage( JSON.stringify( message ), '*' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Bind preview frame links.\n\t *\n\t * @param {string} [selector=a] - selector for anchors\n\t */\n\tfunction enablePreviewLinks( selector = 'a' ) {\n\n\t\tArray.from( dom.wrapper.querySelectorAll( selector ) ).forEach( element => {\n\t\t\tif( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {\n\t\t\t\telement.addEventListener( 'click', onPreviewLinkClicked, false );\n\t\t\t}\n\t\t} );\n\n\t}\n\n\t/**\n\t * Unbind preview frame links.\n\t */\n\tfunction disablePreviewLinks( selector = 'a' ) {\n\n\t\tArray.from( dom.wrapper.querySelectorAll( selector ) ).forEach( element => {\n\t\t\tif( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {\n\t\t\t\telement.removeEventListener( 'click', onPreviewLinkClicked, false );\n\t\t\t}\n\t\t} );\n\n\t}\n\n\t/**\n\t * Opens a preview window for the target URL.\n\t *\n\t * @param {string} url - url for preview iframe src\n\t */\n\tfunction showPreview( url ) {\n\n\t\tcloseOverlay();\n\n\t\tdom.overlay = document.createElement( 'div' );\n\t\tdom.overlay.classList.add( 'overlay' );\n\t\tdom.overlay.classList.add( 'overlay-preview' );\n\t\tdom.wrapper.appendChild( dom.overlay );\n\n\t\tdom.overlay.innerHTML =\n\t\t\t`<header>\n\t\t\t\t<a class=\"close\" href=\"#\"><span class=\"icon\"></span></a>\n\t\t\t\t<a class=\"external\" href=\"${url}\" target=\"_blank\"><span class=\"icon\"></span></a>\n\t\t\t</header>\n\t\t\t<div class=\"spinner\"></div>\n\t\t\t<div class=\"viewport\">\n\t\t\t\t<iframe src=\"${url}\"></iframe>\n\t\t\t\t<small class=\"viewport-inner\">\n\t\t\t\t\t<span class=\"x-frame-error\">Unable to load iframe. This is likely due to the site's policy (x-frame-options).</span>\n\t\t\t\t</small>\n\t\t\t</div>`;\n\n\t\tdom.overlay.querySelector( 'iframe' ).addEventListener( 'load', event => {\n\t\t\tdom.overlay.classList.add( 'loaded' );\n\t\t}, false );\n\n\t\tdom.overlay.querySelector( '.close' ).addEventListener( 'click', event => {\n\t\t\tcloseOverlay();\n\t\t\tevent.preventDefault();\n\t\t}, false );\n\n\t\tdom.overlay.querySelector( '.external' ).addEventListener( 'click', event => {\n\t\t\tcloseOverlay();\n\t\t}, false );\n\n\t}\n\n\t/**\n\t * Open or close help overlay window.\n\t *\n\t * @param {Boolean} [override] Flag which overrides the\n\t * toggle logic and forcibly sets the desired state. True means\n\t * help is open, false means it's closed.\n\t */\n\tfunction toggleHelp( override ){\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? showHelp() : closeOverlay();\n\t\t}\n\t\telse {\n\t\t\tif( dom.overlay ) {\n\t\t\t\tcloseOverlay();\n\t\t\t}\n\t\t\telse {\n\t\t\t\tshowHelp();\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Opens an overlay window with help material.\n\t */\n\tfunction showHelp() {\n\n\t\tif( config.help ) {\n\n\t\t\tcloseOverlay();\n\n\t\t\tdom.overlay = document.createElement( 'div' );\n\t\t\tdom.overlay.classList.add( 'overlay' );\n\t\t\tdom.overlay.classList.add( 'overlay-help' );\n\t\t\tdom.wrapper.appendChild( dom.overlay );\n\n\t\t\tlet html = '<p class=\"title\">Keyboard Shortcuts</p><br/>';\n\n\t\t\tlet shortcuts = keyboard.getShortcuts(),\n\t\t\t\tbindings = keyboard.getBindings();\n\n\t\t\thtml += '<table><th>KEY</th><th>ACTION</th>';\n\t\t\tfor( let key in shortcuts ) {\n\t\t\t\thtml += `<tr><td>${key}</td><td>${shortcuts[ key ]}</td></tr>`;\n\t\t\t}\n\n\t\t\t// Add custom key bindings that have associated descriptions\n\t\t\tfor( let binding in bindings ) {\n\t\t\t\tif( bindings[binding].key && bindings[binding].description ) {\n\t\t\t\t\thtml += `<tr><td>${bindings[binding].key}</td><td>${bindings[binding].description}</td></tr>`;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\thtml += '</table>';\n\n\t\t\tdom.overlay.innerHTML = `\n\t\t\t\t<header>\n\t\t\t\t\t<a class=\"close\" href=\"#\"><span class=\"icon\"></span></a>\n\t\t\t\t</header>\n\t\t\t\t<div class=\"viewport\">\n\t\t\t\t\t<div class=\"viewport-inner\">${html}</div>\n\t\t\t\t</div>\n\t\t\t`;\n\n\t\t\tdom.overlay.querySelector( '.close' ).addEventListener( 'click', event => {\n\t\t\t\tcloseOverlay();\n\t\t\t\tevent.preventDefault();\n\t\t\t}, false );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Closes any currently open overlay.\n\t */\n\tfunction closeOverlay() {\n\n\t\tif( dom.overlay ) {\n\t\t\tdom.overlay.parentNode.removeChild( dom.overlay );\n\t\t\tdom.overlay = null;\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Applies JavaScript-controlled layout rules to the\n\t * presentation.\n\t */\n\tfunction layout() {\n\n\t\tif( dom.wrapper && !printView.isActive() ) {\n\n\t\t\tconst viewportWidth = dom.viewport.offsetWidth;\n\t\t\tconst viewportHeight = dom.viewport.offsetHeight;\n\n\t\t\tif( !config.disableLayout ) {\n\n\t\t\t\t// On some mobile devices '100vh' is taller than the visible\n\t\t\t\t// viewport which leads to part of the presentation being\n\t\t\t\t// cut off. To work around this we define our own '--vh' custom\n\t\t\t\t// property where 100x adds up to the correct height.\n\t\t\t\t//\n\t\t\t\t// https://css-tricks.com/the-trick-to-viewport-units-on-mobile/\n\t\t\t\tif( Device.isMobile && !config.embedded ) {\n\t\t\t\t\tdocument.documentElement.style.setProperty( '--vh', ( window.innerHeight * 0.01 ) + 'px' );\n\t\t\t\t}\n\n\t\t\t\tconst size = scrollView.isActive() ?\n\t\t\t\t\t\t\t getComputedSlideSize( viewportWidth, viewportHeight ) :\n\t\t\t\t\t\t\t getComputedSlideSize();\n\n\t\t\t\tconst oldScale = scale;\n\n\t\t\t\t// Layout the contents of the slides\n\t\t\t\tlayoutSlideContents( config.width, config.height );\n\n\t\t\t\tdom.slides.style.width = size.width + 'px';\n\t\t\t\tdom.slides.style.height = size.height + 'px';\n\n\t\t\t\t// Determine scale of content to fit within available space\n\t\t\t\tscale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height );\n\n\t\t\t\t// Respect max/min scale settings\n\t\t\t\tscale = Math.max( scale, config.minScale );\n\t\t\t\tscale = Math.min( scale, config.maxScale );\n\n\t\t\t\t// Don't apply any scaling styles if scale is 1 or we're\n\t\t\t\t// in the scroll view\n\t\t\t\tif( scale === 1 || scrollView.isActive() ) {\n\t\t\t\t\tdom.slides.style.zoom = '';\n\t\t\t\t\tdom.slides.style.left = '';\n\t\t\t\t\tdom.slides.style.top = '';\n\t\t\t\t\tdom.slides.style.bottom = '';\n\t\t\t\t\tdom.slides.style.right = '';\n\t\t\t\t\ttransformSlides( { layout: '' } );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tdom.slides.style.zoom = '';\n\t\t\t\t\tdom.slides.style.left = '50%';\n\t\t\t\t\tdom.slides.style.top = '50%';\n\t\t\t\t\tdom.slides.style.bottom = 'auto';\n\t\t\t\t\tdom.slides.style.right = 'auto';\n\t\t\t\t\ttransformSlides( { layout: 'translate(-50%, -50%) scale('+ scale +')' } );\n\t\t\t\t}\n\n\t\t\t\t// Select all slides, vertical and horizontal\n\t\t\t\tconst slides = Array.from( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) );\n\n\t\t\t\tfor( let i = 0, len = slides.length; i < len; i++ ) {\n\t\t\t\t\tconst slide = slides[ i ];\n\n\t\t\t\t\t// Don't bother updating invisible slides\n\t\t\t\t\tif( slide.style.display === 'none' ) {\n\t\t\t\t\t\tcontinue;\n\t\t\t\t\t}\n\n\t\t\t\t\tif( ( config.center || slide.classList.contains( 'center' ) ) ) {\n\t\t\t\t\t\t// Vertical stacks are not centred since their section\n\t\t\t\t\t\t// children will be\n\t\t\t\t\t\tif( slide.classList.contains( 'stack' ) ) {\n\t\t\t\t\t\t\tslide.style.top = 0;\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tslide.style.top = Math.max( ( size.height - slide.scrollHeight ) / 2, 0 ) + 'px';\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tslide.style.top = '';\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tif( oldScale !== scale ) {\n\t\t\t\t\tdispatchEvent({\n\t\t\t\t\t\ttype: 'resize',\n\t\t\t\t\t\tdata: {\n\t\t\t\t\t\t\toldScale,\n\t\t\t\t\t\t\tscale,\n\t\t\t\t\t\t\tsize\n\t\t\t\t\t\t}\n\t\t\t\t\t});\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tcheckResponsiveScrollView();\n\n\t\t\tdom.viewport.style.setProperty( '--slide-scale', scale );\n\t\t\tdom.viewport.style.setProperty( '--viewport-width', viewportWidth + 'px' );\n\t\t\tdom.viewport.style.setProperty( '--viewport-height', viewportHeight + 'px' );\n\n\t\t\tscrollView.layout();\n\n\t\t\tprogress.update();\n\t\t\tbackgrounds.updateParallax();\n\n\t\t\tif( overview.isActive() ) {\n\t\t\t\toverview.update();\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Applies layout logic to the contents of all slides in\n\t * the presentation.\n\t *\n\t * @param {string|number} width\n\t * @param {string|number} height\n\t */\n\tfunction layoutSlideContents( width, height ) {\n\t\t// Handle sizing of elements with the 'r-stretch' class\n\t\tUtil.queryAll( dom.slides, 'section > .stretch, section > .r-stretch' ).forEach( element => {\n\n\t\t\t// Determine how much vertical space we can use\n\t\t\tlet remainingHeight = Util.getRemainingHeight( element, height );\n\n\t\t\t// Consider the aspect ratio of media elements\n\t\t\tif( /(img|video)/gi.test( element.nodeName ) ) {\n\t\t\t\tconst nw = element.naturalWidth || element.videoWidth,\n\t\t\t\t\t nh = element.naturalHeight || element.videoHeight;\n\n\t\t\t\tconst es = Math.min( width / nw, remainingHeight / nh );\n\n\t\t\t\telement.style.width = ( nw * es ) + 'px';\n\t\t\t\telement.style.height = ( nh * es ) + 'px';\n\n\t\t\t}\n\t\t\telse {\n\t\t\t\telement.style.width = width + 'px';\n\t\t\t\telement.style.height = remainingHeight + 'px';\n\t\t\t}\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Responsively activates the scroll mode when we reach the configured\n\t * activation width.\n\t */\n\tfunction checkResponsiveScrollView() {\n\n\t\t// Only proceed if...\n\t\t// 1. The DOM is ready\n\t\t// 2. Layouts aren't disabled via config\n\t\t// 3. We're not currently printing\n\t\t// 4. There is a scrollActivationWidth set\n\t\t// 5. The deck isn't configured to always use the scroll view\n\t\tif(\n\t\t\tdom.wrapper &&\n\t\t\t!config.disableLayout &&\n\t\t\t!printView.isActive() &&\n\t\t\ttypeof config.scrollActivationWidth === 'number' &&\n\t\t\tconfig.view !== 'scroll'\n\t\t) {\n\t\t\tconst size = getComputedSlideSize();\n\n\t\t\tif( size.presentationWidth > 0 && size.presentationWidth <= config.scrollActivationWidth ) {\n\t\t\t\tif( !scrollView.isActive() ) {\n\t\t\t\t\tbackgrounds.create();\n\t\t\t\t\tscrollView.activate()\n\t\t\t\t};\n\t\t\t}\n\t\t\telse {\n\t\t\t\tif( scrollView.isActive() ) scrollView.deactivate();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Calculates the computed pixel size of our slides. These\n\t * values are based on the width and height configuration\n\t * options.\n\t *\n\t * @param {number} [presentationWidth=dom.wrapper.offsetWidth]\n\t * @param {number} [presentationHeight=dom.wrapper.offsetHeight]\n\t */\n\tfunction getComputedSlideSize( presentationWidth, presentationHeight ) {\n\n\t\tlet width = config.width;\n\t\tlet height = config.height;\n\n\t\tif( config.disableLayout ) {\n\t\t\twidth = dom.slides.offsetWidth;\n\t\t\theight = dom.slides.offsetHeight;\n\t\t}\n\n\t\tconst size = {\n\t\t\t// Slide size\n\t\t\twidth: width,\n\t\t\theight: height,\n\n\t\t\t// Presentation size\n\t\t\tpresentationWidth: presentationWidth || dom.wrapper.offsetWidth,\n\t\t\tpresentationHeight: presentationHeight || dom.wrapper.offsetHeight\n\t\t};\n\n\t\t// Reduce available space by margin\n\t\tsize.presentationWidth -= ( size.presentationWidth * config.margin );\n\t\tsize.presentationHeight -= ( size.presentationHeight * config.margin );\n\n\t\t// Slide width may be a percentage of available width\n\t\tif( typeof size.width === 'string' && /%$/.test( size.width ) ) {\n\t\t\tsize.width = parseInt( size.width, 10 ) / 100 * size.presentationWidth;\n\t\t}\n\n\t\t// Slide height may be a percentage of available height\n\t\tif( typeof size.height === 'string' && /%$/.test( size.height ) ) {\n\t\t\tsize.height = parseInt( size.height, 10 ) / 100 * size.presentationHeight;\n\t\t}\n\n\t\treturn size;\n\n\t}\n\n\t/**\n\t * Stores the vertical index of a stack so that the same\n\t * vertical slide can be selected when navigating to and\n\t * from the stack.\n\t *\n\t * @param {HTMLElement} stack The vertical stack element\n\t * @param {string|number} [v=0] Index to memorize\n\t */\n\tfunction setPreviousVerticalIndex( stack, v ) {\n\n\t\tif( typeof stack === 'object' && typeof stack.setAttribute === 'function' ) {\n\t\t\tstack.setAttribute( 'data-previous-indexv', v || 0 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Retrieves the vertical index which was stored using\n\t * #setPreviousVerticalIndex() or 0 if no previous index\n\t * exists.\n\t *\n\t * @param {HTMLElement} stack The vertical stack element\n\t */\n\tfunction getPreviousVerticalIndex( stack ) {\n\n\t\tif( typeof stack === 'object' && typeof stack.setAttribute === 'function' && stack.classList.contains( 'stack' ) ) {\n\t\t\t// Prefer manually defined start-indexv\n\t\t\tconst attributeName = stack.hasAttribute( 'data-start-indexv' ) ? 'data-start-indexv' : 'data-previous-indexv';\n\n\t\t\treturn parseInt( stack.getAttribute( attributeName ) || 0, 10 );\n\t\t}\n\n\t\treturn 0;\n\n\t}\n\n\t/**\n\t * Checks if the current or specified slide is vertical\n\t * (nested within another slide).\n\t *\n\t * @param {HTMLElement} [slide=currentSlide] The slide to check\n\t * orientation of\n\t * @return {Boolean}\n\t */\n\tfunction isVerticalSlide( slide = currentSlide ) {\n\n\t\treturn slide && slide.parentNode && !!slide.parentNode.nodeName.match( /section/i );\n\n\t}\n\n\t/**\n\t * Checks if the current or specified slide is a stack containing\n\t * vertical slides.\n\t *\n\t * @param {HTMLElement} [slide=currentSlide]\n\t * @return {Boolean}\n\t */\n\tfunction isVerticalStack( slide = currentSlide ) {\n\n\t\treturn slide.classList.contains( '.stack' ) || slide.querySelector( 'section' ) !== null;\n\n\t}\n\n\t/**\n\t * Returns true if we're on the last slide in the current\n\t * vertical stack.\n\t */\n\tfunction isLastVerticalSlide() {\n\n\t\tif( currentSlide && isVerticalSlide( currentSlide ) ) {\n\t\t\t// Does this slide have a next sibling?\n\t\t\tif( currentSlide.nextElementSibling ) return false;\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Returns true if we're currently on the first slide in\n\t * the presentation.\n\t */\n\tfunction isFirstSlide() {\n\n\t\treturn indexh === 0 && indexv === 0;\n\n\t}\n\n\t/**\n\t * Returns true if we're currently on the last slide in\n\t * the presenation. If the last slide is a stack, we only\n\t * consider this the last slide if it's at the end of the\n\t * stack.\n\t */\n\tfunction isLastSlide() {\n\n\t\tif( currentSlide ) {\n\t\t\t// Does this slide have a next sibling?\n\t\t\tif( currentSlide.nextElementSibling ) return false;\n\n\t\t\t// If it's vertical, does its parent have a next sibling?\n\t\t\tif( isVerticalSlide( currentSlide ) && currentSlide.parentNode.nextElementSibling ) return false;\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Enters the paused mode which fades everything on screen to\n\t * black.\n\t */\n\tfunction pause() {\n\n\t\tif( config.pause ) {\n\t\t\tconst wasPaused = dom.wrapper.classList.contains( 'paused' );\n\n\t\t\tcancelAutoSlide();\n\t\t\tdom.wrapper.classList.add( 'paused' );\n\n\t\t\tif( wasPaused === false ) {\n\t\t\t\tdispatchEvent({ type: 'paused' });\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Exits from the paused mode.\n\t */\n\tfunction resume() {\n\n\t\tconst wasPaused = dom.wrapper.classList.contains( 'paused' );\n\t\tdom.wrapper.classList.remove( 'paused' );\n\n\t\tcueAutoSlide();\n\n\t\tif( wasPaused ) {\n\t\t\tdispatchEvent({ type: 'resumed' });\n\t\t}\n\n\t}\n\n\t/**\n\t * Toggles the paused mode on and off.\n\t */\n\tfunction togglePause( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? pause() : resume();\n\t\t}\n\t\telse {\n\t\t\tisPaused() ? resume() : pause();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if we are currently in the paused mode.\n\t *\n\t * @return {Boolean}\n\t */\n\tfunction isPaused() {\n\n\t\treturn dom.wrapper.classList.contains( 'paused' );\n\n\t}\n\n\t/**\n\t * Toggles visibility of the jump-to-slide UI.\n\t */\n\tfunction toggleJumpToSlide( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? jumpToSlide.show() : jumpToSlide.hide();\n\t\t}\n\t\telse {\n\t\t\tjumpToSlide.isVisible() ? jumpToSlide.hide() : jumpToSlide.show();\n\t\t}\n\n\t}\n\n\t/**\n\t * Toggles the auto slide mode on and off.\n\t *\n\t * @param {Boolean} [override] Flag which sets the desired state.\n\t * True means autoplay starts, false means it stops.\n\t */\n\n\tfunction toggleAutoSlide( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? resumeAutoSlide() : pauseAutoSlide();\n\t\t}\n\n\t\telse {\n\t\t\tautoSlidePaused ? resumeAutoSlide() : pauseAutoSlide();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if the auto slide mode is currently on.\n\t *\n\t * @return {Boolean}\n\t */\n\tfunction isAutoSliding() {\n\n\t\treturn !!( autoSlide && !autoSlidePaused );\n\n\t}\n\n\t/**\n\t * Steps from the current point in the presentation to the\n\t * slide which matches the specified horizontal and vertical\n\t * indices.\n\t *\n\t * @param {number} [h=indexh] Horizontal index of the target slide\n\t * @param {number} [v=indexv] Vertical index of the target slide\n\t * @param {number} [f] Index of a fragment within the\n\t * target slide to activate\n\t * @param {number} [origin] Origin for use in multimaster environments\n\t */\n\tfunction slide( h, v, f, origin ) {\n\n\t\t// Dispatch an event before the slide\n\t\tconst slidechange = dispatchEvent({\n\t\t\ttype: 'beforeslidechange',\n\t\t\tdata: {\n\t\t\t\tindexh: h === undefined ? indexh : h,\n\t\t\t\tindexv: v === undefined ? indexv : v,\n\t\t\t\torigin\n\t\t\t}\n\t\t});\n\n\t\t// Abort if this slide change was prevented by an event listener\n\t\tif( slidechange.defaultPrevented ) return;\n\n\t\t// Remember where we were at before\n\t\tpreviousSlide = currentSlide;\n\n\t\t// Query all horizontal slides in the deck\n\t\tconst horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );\n\n\t\t// If we're in scroll mode, we scroll the target slide into view\n\t\t// instead of running our standard slide transition\n\t\tif( scrollView.isActive() ) {\n\t\t\tconst scrollToSlide = scrollView.getSlideByIndices( h, v );\n\t\t\tif( scrollToSlide ) scrollView.scrollToSlide( scrollToSlide );\n\t\t\treturn;\n\t\t}\n\n\t\t// Abort if there are no slides\n\t\tif( horizontalSlides.length === 0 ) return;\n\n\t\t// If no vertical index is specified and the upcoming slide is a\n\t\t// stack, resume at its previous vertical index\n\t\tif( v === undefined && !overview.isActive() ) {\n\t\t\tv = getPreviousVerticalIndex( horizontalSlides[ h ] );\n\t\t}\n\n\t\t// If we were on a vertical stack, remember what vertical index\n\t\t// it was on so we can resume at the same position when returning\n\t\tif( previousSlide && previousSlide.parentNode && previousSlide.parentNode.classList.contains( 'stack' ) ) {\n\t\t\tsetPreviousVerticalIndex( previousSlide.parentNode, indexv );\n\t\t}\n\n\t\t// Remember the state before this slide\n\t\tconst stateBefore = state.concat();\n\n\t\t// Reset the state array\n\t\tstate.length = 0;\n\n\t\tlet indexhBefore = indexh || 0,\n\t\t\tindexvBefore = indexv || 0;\n\n\t\t// Activate and transition to the new slide\n\t\tindexh = updateSlides( HORIZONTAL_SLIDES_SELECTOR, h === undefined ? indexh : h );\n\t\tindexv = updateSlides( VERTICAL_SLIDES_SELECTOR, v === undefined ? indexv : v );\n\n\t\t// Dispatch an event if the slide changed\n\t\tlet slideChanged = ( indexh !== indexhBefore || indexv !== indexvBefore );\n\n\t\t// Ensure that the previous slide is never the same as the current\n\t\tif( !slideChanged ) previousSlide = null;\n\n\t\t// Find the current horizontal slide and any possible vertical slides\n\t\t// within it\n\t\tlet currentHorizontalSlide = horizontalSlides[ indexh ],\n\t\t\tcurrentVerticalSlides = currentHorizontalSlide.querySelectorAll( 'section' );\n\n\t\t// Indicate when we're on a vertical slide\n\t\trevealElement.classList.toggle( 'is-vertical-slide', currentVerticalSlides.length > 1 );\n\n\t\t// Store references to the previous and current slides\n\t\tcurrentSlide = currentVerticalSlides[ indexv ] || currentHorizontalSlide;\n\n\t\tlet autoAnimateTransition = false;\n\n\t\t// Detect if we're moving between two auto-animated slides\n\t\tif( slideChanged && previousSlide && currentSlide && !overview.isActive() ) {\n\t\t\ttransition = 'running';\n\n\t\t\tautoAnimateTransition = shouldAutoAnimateBetween( previousSlide, currentSlide, indexhBefore, indexvBefore );\n\n\t\t\t// If this is an auto-animated transition, we disable the\n\t\t\t// regular slide transition\n\t\t\t//\n\t\t\t// Note 20-03-2020:\n\t\t\t// This needs to happen before we update slide visibility,\n\t\t\t// otherwise transitions will still run in Safari.\n\t\t\tif( autoAnimateTransition ) {\n\t\t\t\tdom.slides.classList.add( 'disable-slide-transitions' )\n\t\t\t}\n\t\t}\n\n\t\t// Update the visibility of slides now that the indices have changed\n\t\tupdateSlidesVisibility();\n\n\t\tlayout();\n\n\t\t// Update the overview if it's currently active\n\t\tif( overview.isActive() ) {\n\t\t\toverview.update();\n\t\t}\n\n\t\t// Show fragment, if specified\n\t\tif( typeof f !== 'undefined' ) {\n\t\t\tfragments.goto( f );\n\t\t}\n\n\t\t// Solves an edge case where the previous slide maintains the\n\t\t// 'present' class when navigating between adjacent vertical\n\t\t// stacks\n\t\tif( previousSlide && previousSlide !== currentSlide ) {\n\t\t\tpreviousSlide.classList.remove( 'present' );\n\t\t\tpreviousSlide.setAttribute( 'aria-hidden', 'true' );\n\n\t\t\t// Reset all slides upon navigate to home\n\t\t\tif( isFirstSlide() ) {\n\t\t\t\t// Launch async task\n\t\t\t\tsetTimeout( () => {\n\t\t\t\t\tgetVerticalStacks().forEach( slide => {\n\t\t\t\t\t\tsetPreviousVerticalIndex( slide, 0 );\n\t\t\t\t\t} );\n\t\t\t\t}, 0 );\n\t\t\t}\n\t\t}\n\n\t\t// Apply the new state\n\t\tstateLoop: for( let i = 0, len = state.length; i < len; i++ ) {\n\t\t\t// Check if this state existed on the previous slide. If it\n\t\t\t// did, we will avoid adding it repeatedly\n\t\t\tfor( let j = 0; j < stateBefore.length; j++ ) {\n\t\t\t\tif( stateBefore[j] === state[i] ) {\n\t\t\t\t\tstateBefore.splice( j, 1 );\n\t\t\t\t\tcontinue stateLoop;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tdom.viewport.classList.add( state[i] );\n\n\t\t\t// Dispatch custom event matching the state's name\n\t\t\tdispatchEvent({ type: state[i] });\n\t\t}\n\n\t\t// Clean up the remains of the previous state\n\t\twhile( stateBefore.length ) {\n\t\t\tdom.viewport.classList.remove( stateBefore.pop() );\n\t\t}\n\n\t\tif( slideChanged ) {\n\t\t\tdispatchSlideChanged( origin );\n\t\t}\n\n\t\t// Handle embedded content\n\t\tif( slideChanged || !previousSlide ) {\n\t\t\tslideContent.stopEmbeddedContent( previousSlide );\n\t\t\tslideContent.startEmbeddedContent( currentSlide );\n\t\t}\n\n\t\t// Announce the current slide contents to screen readers\n\t\t// Use animation frame to prevent getComputedStyle in getStatusText\n\t\t// from triggering layout mid-frame\n\t\trequestAnimationFrame( () => {\n\t\t\tannounceStatus( getStatusText( currentSlide ) );\n\t\t});\n\n\t\tprogress.update();\n\t\tcontrols.update();\n\t\tnotes.update();\n\t\tbackgrounds.update();\n\t\tbackgrounds.updateParallax();\n\t\tslideNumber.update();\n\t\tfragments.update();\n\n\t\t// Update the URL hash\n\t\tlocation.writeURL();\n\n\t\tcueAutoSlide();\n\n\t\t// Auto-animation\n\t\tif( autoAnimateTransition ) {\n\n\t\t\tsetTimeout( () => {\n\t\t\t\tdom.slides.classList.remove( 'disable-slide-transitions' );\n\t\t\t}, 0 );\n\n\t\t\tif( config.autoAnimate ) {\n\t\t\t\t// Run the auto-animation between our slides\n\t\t\t\tautoAnimate.run( previousSlide, currentSlide );\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks whether or not an auto-animation should take place between\n\t * the two given slides.\n\t *\n\t * @param {HTMLElement} fromSlide\n\t * @param {HTMLElement} toSlide\n\t * @param {number} indexhBefore\n\t * @param {number} indexvBefore\n\t *\n\t * @returns {boolean}\n\t */\n\tfunction shouldAutoAnimateBetween( fromSlide, toSlide, indexhBefore, indexvBefore ) {\n\n\t\treturn \tfromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' ) &&\n\t\t\t\tfromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) &&\n\t\t\t\t!( ( indexh > indexhBefore || indexv > indexvBefore ) ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' );\n\n\t}\n\n\t/**\n\t * Called anytime a new slide should be activated while in the scroll\n\t * view. The active slide is the page that occupies the most space in\n\t * the scrollable viewport.\n\t *\n\t * @param {number} pageIndex\n\t * @param {HTMLElement} slideElement\n\t */\n\tfunction setCurrentScrollPage( slideElement, h, v ) {\n\n\t\tlet indexhBefore = indexh || 0;\n\n\t\tindexh = h;\n\t\tindexv = v;\n\n\t\tconst slideChanged = currentSlide !== slideElement;\n\n\t\tpreviousSlide = currentSlide;\n\t\tcurrentSlide = slideElement;\n\n\t\tif( currentSlide && previousSlide ) {\n\t\t\tif( config.autoAnimate && shouldAutoAnimateBetween( previousSlide, currentSlide, indexhBefore, indexv ) ) {\n\t\t\t\t// Run the auto-animation between our slides\n\t\t\t\tautoAnimate.run( previousSlide, currentSlide );\n\t\t\t}\n\t\t}\n\n\t\t// Start or stop embedded content like videos and iframes\n\t\tif( slideChanged ) {\n\t\t\tif( previousSlide ) {\n\t\t\t\tslideContent.stopEmbeddedContent( previousSlide );\n\t\t\t\tslideContent.stopEmbeddedContent( previousSlide.slideBackgroundElement );\n\t\t\t}\n\n\t\t\tslideContent.startEmbeddedContent( currentSlide );\n\t\t\tslideContent.startEmbeddedContent( currentSlide.slideBackgroundElement );\n\t\t}\n\n\t\trequestAnimationFrame( () => {\n\t\t\tannounceStatus( getStatusText( currentSlide ) );\n\t\t});\n\n\t\tdispatchSlideChanged();\n\n\t}\n\n\t/**\n\t * Syncs the presentation with the current DOM. Useful\n\t * when new slides or control elements are added or when\n\t * the configuration has changed.\n\t */\n\tfunction sync() {\n\n\t\t// Subscribe to input\n\t\tremoveEventListeners();\n\t\taddEventListeners();\n\n\t\t// Force a layout to make sure the current config is accounted for\n\t\tlayout();\n\n\t\t// Reflect the current autoSlide value\n\t\tautoSlide = config.autoSlide;\n\n\t\t// Start auto-sliding if it's enabled\n\t\tcueAutoSlide();\n\n\t\t// Re-create all slide backgrounds\n\t\tbackgrounds.create();\n\n\t\t// Write the current hash to the URL\n\t\tlocation.writeURL();\n\n\t\tif( config.sortFragmentsOnSync === true ) {\n\t\t\tfragments.sortAll();\n\t\t}\n\n\t\tcontrols.update();\n\t\tprogress.update();\n\n\t\tupdateSlidesVisibility();\n\n\t\tnotes.update();\n\t\tnotes.updateVisibility();\n\t\tbackgrounds.update( true );\n\t\tslideNumber.update();\n\t\tslideContent.formatEmbeddedContent();\n\n\t\t// Start or stop embedded content depending on global config\n\t\tif( config.autoPlayMedia === false ) {\n\t\t\tslideContent.stopEmbeddedContent( currentSlide, { unloadIframes: false } );\n\t\t}\n\t\telse {\n\t\t\tslideContent.startEmbeddedContent( currentSlide );\n\t\t}\n\n\t\tif( overview.isActive() ) {\n\t\t\toverview.layout();\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates reveal.js to keep in sync with new slide attributes. For\n\t * example, if you add a new `data-background-image` you can call\n\t * this to have reveal.js render the new background image.\n\t *\n\t * Similar to #sync() but more efficient when you only need to\n\t * refresh a specific slide.\n\t *\n\t * @param {HTMLElement} slide\n\t */\n\tfunction syncSlide( slide = currentSlide ) {\n\n\t\tbackgrounds.sync( slide );\n\t\tfragments.sync( slide );\n\n\t\tslideContent.load( slide );\n\n\t\tbackgrounds.update();\n\t\tnotes.update();\n\n\t}\n\n\t/**\n\t * Resets all vertical slides so that only the first\n\t * is visible.\n\t */\n\tfunction resetVerticalSlides() {\n\n\t\tgetHorizontalSlides().forEach( horizontalSlide => {\n\n\t\t\tUtil.queryAll( horizontalSlide, 'section' ).forEach( ( verticalSlide, y ) => {\n\n\t\t\t\tif( y > 0 ) {\n\t\t\t\t\tverticalSlide.classList.remove( 'present' );\n\t\t\t\t\tverticalSlide.classList.remove( 'past' );\n\t\t\t\t\tverticalSlide.classList.add( 'future' );\n\t\t\t\t\tverticalSlide.setAttribute( 'aria-hidden', 'true' );\n\t\t\t\t}\n\n\t\t\t} );\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Randomly shuffles all slides in the deck.\n\t */\n\tfunction shuffle( slides = getHorizontalSlides() ) {\n\n\t\tslides.forEach( ( slide, i ) => {\n\n\t\t\t// Insert the slide next to a randomly picked sibling slide\n\t\t\t// slide. This may cause the slide to insert before itself,\n\t\t\t// but that's not an issue.\n\t\t\tlet beforeSlide = slides[ Math.floor( Math.random() * slides.length ) ];\n\t\t\tif( beforeSlide.parentNode === slide.parentNode ) {\n\t\t\t\tslide.parentNode.insertBefore( slide, beforeSlide );\n\t\t\t}\n\n\t\t\t// Randomize the order of vertical slides (if there are any)\n\t\t\tlet verticalSlides = slide.querySelectorAll( 'section' );\n\t\t\tif( verticalSlides.length ) {\n\t\t\t\tshuffle( verticalSlides );\n\t\t\t}\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Updates one dimension of slides by showing the slide\n\t * with the specified index.\n\t *\n\t * @param {string} selector A CSS selector that will fetch\n\t * the group of slides we are working with\n\t * @param {number} index The index of the slide that should be\n\t * shown\n\t *\n\t * @return {number} The index of the slide that is now shown,\n\t * might differ from the passed in index if it was out of\n\t * bounds.\n\t */\n\tfunction updateSlides( selector, index ) {\n\n\t\t// Select all slides and convert the NodeList result to\n\t\t// an array\n\t\tlet slides = Util.queryAll( dom.wrapper, selector ),\n\t\t\tslidesLength = slides.length;\n\n\t\tlet printMode = scrollView.isActive() || printView.isActive();\n\t\tlet loopedForwards = false;\n\t\tlet loopedBackwards = false;\n\n\t\tif( slidesLength ) {\n\n\t\t\t// Should the index loop?\n\t\t\tif( config.loop ) {\n\t\t\t\tif( index >= slidesLength ) loopedForwards = true;\n\n\t\t\t\tindex %= slidesLength;\n\n\t\t\t\tif( index < 0 ) {\n\t\t\t\t\tindex = slidesLength + index;\n\t\t\t\t\tloopedBackwards = true;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Enforce max and minimum index bounds\n\t\t\tindex = Math.max( Math.min( index, slidesLength - 1 ), 0 );\n\n\t\t\tfor( let i = 0; i < slidesLength; i++ ) {\n\t\t\t\tlet element = slides[i];\n\n\t\t\t\tlet reverse = config.rtl && !isVerticalSlide( element );\n\n\t\t\t\t// Avoid .remove() with multiple args for IE11 support\n\t\t\t\telement.classList.remove( 'past' );\n\t\t\t\telement.classList.remove( 'present' );\n\t\t\t\telement.classList.remove( 'future' );\n\n\t\t\t\t// http://www.w3.org/html/wg/drafts/html/master/editing.html#the-hidden-attribute\n\t\t\t\telement.setAttribute( 'hidden', '' );\n\t\t\t\telement.setAttribute( 'aria-hidden', 'true' );\n\n\t\t\t\t// If this element contains vertical slides\n\t\t\t\tif( element.querySelector( 'section' ) ) {\n\t\t\t\t\telement.classList.add( 'stack' );\n\t\t\t\t}\n\n\t\t\t\t// If we're printing static slides, all slides are \"present\"\n\t\t\t\tif( printMode ) {\n\t\t\t\t\telement.classList.add( 'present' );\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\tif( i < index ) {\n\t\t\t\t\t// Any element previous to index is given the 'past' class\n\t\t\t\t\telement.classList.add( reverse ? 'future' : 'past' );\n\n\t\t\t\t\tif( config.fragments ) {\n\t\t\t\t\t\t// Show all fragments in prior slides\n\t\t\t\t\t\tshowFragmentsIn( element );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if( i > index ) {\n\t\t\t\t\t// Any element subsequent to index is given the 'future' class\n\t\t\t\t\telement.classList.add( reverse ? 'past' : 'future' );\n\n\t\t\t\t\tif( config.fragments ) {\n\t\t\t\t\t\t// Hide all fragments in future slides\n\t\t\t\t\t\thideFragmentsIn( element );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t// Update the visibility of fragments when a presentation loops\n\t\t\t\t// in either direction\n\t\t\t\telse if( i === index && config.fragments ) {\n\t\t\t\t\tif( loopedForwards ) {\n\t\t\t\t\t\thideFragmentsIn( element );\n\t\t\t\t\t}\n\t\t\t\t\telse if( loopedBackwards ) {\n\t\t\t\t\t\tshowFragmentsIn( element );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tlet slide = slides[index];\n\t\t\tlet wasPresent = slide.classList.contains( 'present' );\n\n\t\t\t// Mark the current slide as present\n\t\t\tslide.classList.add( 'present' );\n\t\t\tslide.removeAttribute( 'hidden' );\n\t\t\tslide.removeAttribute( 'aria-hidden' );\n\n\t\t\tif( !wasPresent ) {\n\t\t\t\t// Dispatch an event indicating the slide is now visible\n\t\t\t\tdispatchEvent({\n\t\t\t\t\ttarget: slide,\n\t\t\t\t\ttype: 'visible',\n\t\t\t\t\tbubbles: false\n\t\t\t\t});\n\t\t\t}\n\n\t\t\t// If this slide has a state associated with it, add it\n\t\t\t// onto the current state of the deck\n\t\t\tlet slideState = slide.getAttribute( 'data-state' );\n\t\t\tif( slideState ) {\n\t\t\t\tstate = state.concat( slideState.split( ' ' ) );\n\t\t\t}\n\n\t\t}\n\t\telse {\n\t\t\t// Since there are no slides we can't be anywhere beyond the\n\t\t\t// zeroth index\n\t\t\tindex = 0;\n\t\t}\n\n\t\treturn index;\n\n\t}\n\n\t/**\n\t * Shows all fragment elements within the given container.\n\t */\n\tfunction showFragmentsIn( container ) {\n\n\t\tUtil.queryAll( container, '.fragment' ).forEach( fragment => {\n\t\t\tfragment.classList.add( 'visible' );\n\t\t\tfragment.classList.remove( 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Hides all fragment elements within the given container.\n\t */\n\tfunction hideFragmentsIn( container ) {\n\n\t\tUtil.queryAll( container, '.fragment.visible' ).forEach( fragment => {\n\t\t\tfragment.classList.remove( 'visible', 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Optimization method; hide all slides that are far away\n\t * from the present slide.\n\t */\n\tfunction updateSlidesVisibility() {\n\n\t\t// Select all slides and convert the NodeList result to\n\t\t// an array\n\t\tlet horizontalSlides = getHorizontalSlides(),\n\t\t\thorizontalSlidesLength = horizontalSlides.length,\n\t\t\tdistanceX,\n\t\t\tdistanceY;\n\n\t\tif( horizontalSlidesLength && typeof indexh !== 'undefined' ) {\n\n\t\t\t// The number of steps away from the present slide that will\n\t\t\t// be visible\n\t\t\tlet viewDistance = overview.isActive() ? 10 : config.viewDistance;\n\n\t\t\t// Shorten the view distance on devices that typically have\n\t\t\t// less resources\n\t\t\tif( Device.isMobile ) {\n\t\t\t\tviewDistance = overview.isActive() ? 6 : config.mobileViewDistance;\n\t\t\t}\n\n\t\t\t// All slides need to be visible when exporting to PDF\n\t\t\tif( printView.isActive() ) {\n\t\t\t\tviewDistance = Number.MAX_VALUE;\n\t\t\t}\n\n\t\t\tfor( let x = 0; x < horizontalSlidesLength; x++ ) {\n\t\t\t\tlet horizontalSlide = horizontalSlides[x];\n\n\t\t\t\tlet verticalSlides = Util.queryAll( horizontalSlide, 'section' ),\n\t\t\t\t\tverticalSlidesLength = verticalSlides.length;\n\n\t\t\t\t// Determine how far away this slide is from the present\n\t\t\t\tdistanceX = Math.abs( ( indexh || 0 ) - x ) || 0;\n\n\t\t\t\t// If the presentation is looped, distance should measure\n\t\t\t\t// 1 between the first and last slides\n\t\t\t\tif( config.loop ) {\n\t\t\t\t\tdistanceX = Math.abs( ( ( indexh || 0 ) - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0;\n\t\t\t\t}\n\n\t\t\t\t// Show the horizontal slide if it's within the view distance\n\t\t\t\tif( distanceX < viewDistance ) {\n\t\t\t\t\tslideContent.load( horizontalSlide );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tslideContent.unload( horizontalSlide );\n\t\t\t\t}\n\n\t\t\t\tif( verticalSlidesLength ) {\n\n\t\t\t\t\tlet oy = getPreviousVerticalIndex( horizontalSlide );\n\n\t\t\t\t\tfor( let y = 0; y < verticalSlidesLength; y++ ) {\n\t\t\t\t\t\tlet verticalSlide = verticalSlides[y];\n\n\t\t\t\t\t\tdistanceY = x === ( indexh || 0 ) ? Math.abs( ( indexv || 0 ) - y ) : Math.abs( y - oy );\n\n\t\t\t\t\t\tif( distanceX + distanceY < viewDistance ) {\n\t\t\t\t\t\t\tslideContent.load( verticalSlide );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tslideContent.unload( verticalSlide );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Flag if there are ANY vertical slides, anywhere in the deck\n\t\t\tif( hasVerticalSlides() ) {\n\t\t\t\tdom.wrapper.classList.add( 'has-vertical-slides' );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tdom.wrapper.classList.remove( 'has-vertical-slides' );\n\t\t\t}\n\n\t\t\t// Flag if there are ANY horizontal slides, anywhere in the deck\n\t\t\tif( hasHorizontalSlides() ) {\n\t\t\t\tdom.wrapper.classList.add( 'has-horizontal-slides' );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tdom.wrapper.classList.remove( 'has-horizontal-slides' );\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Determine what available routes there are for navigation.\n\t *\n\t * @return {{left: boolean, right: boolean, up: boolean, down: boolean}}\n\t */\n\tfunction availableRoutes({ includeFragments = false } = {}) {\n\n\t\tlet horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ),\n\t\t\tverticalSlides = dom.wrapper.querySelectorAll( VERTICAL_SLIDES_SELECTOR );\n\n\t\tlet routes = {\n\t\t\tleft: indexh > 0,\n\t\t\tright: indexh < horizontalSlides.length - 1,\n\t\t\tup: indexv > 0,\n\t\t\tdown: indexv < verticalSlides.length - 1\n\t\t};\n\n\t\t// Looped presentations can always be navigated as long as\n\t\t// there are slides available\n\t\tif( config.loop ) {\n\t\t\tif( horizontalSlides.length > 1 ) {\n\t\t\t\troutes.left = true;\n\t\t\t\troutes.right = true;\n\t\t\t}\n\n\t\t\tif( verticalSlides.length > 1 ) {\n\t\t\t\troutes.up = true;\n\t\t\t\troutes.down = true;\n\t\t\t}\n\t\t}\n\n\t\tif ( horizontalSlides.length > 1 && config.navigationMode === 'linear' ) {\n\t\t\troutes.right = routes.right || routes.down;\n\t\t\troutes.left = routes.left || routes.up;\n\t\t}\n\n\t\t// If includeFragments is set, a route will be considered\n\t\t// available if either a slid OR fragment is available in\n\t\t// the given direction\n\t\tif( includeFragments === true ) {\n\t\t\tlet fragmentRoutes = fragments.availableRoutes();\n\t\t\troutes.left = routes.left || fragmentRoutes.prev;\n\t\t\troutes.up = routes.up || fragmentRoutes.prev;\n\t\t\troutes.down = routes.down || fragmentRoutes.next;\n\t\t\troutes.right = routes.right || fragmentRoutes.next;\n\t\t}\n\n\t\t// Reverse horizontal controls for rtl\n\t\tif( config.rtl ) {\n\t\t\tlet left = routes.left;\n\t\t\troutes.left = routes.right;\n\t\t\troutes.right = left;\n\t\t}\n\n\t\treturn routes;\n\n\t}\n\n\t/**\n\t * Returns the number of past slides. This can be used as a global\n\t * flattened index for slides.\n\t *\n\t * @param {HTMLElement} [slide=currentSlide] The slide we're counting before\n\t *\n\t * @return {number} Past slide count\n\t */\n\tfunction getSlidePastCount( slide = currentSlide ) {\n\n\t\tlet horizontalSlides = getHorizontalSlides();\n\n\t\t// The number of past slides\n\t\tlet pastCount = 0;\n\n\t\t// Step through all slides and count the past ones\n\t\tmainLoop: for( let i = 0; i < horizontalSlides.length; i++ ) {\n\n\t\t\tlet horizontalSlide = horizontalSlides[i];\n\t\t\tlet verticalSlides = horizontalSlide.querySelectorAll( 'section' );\n\n\t\t\tfor( let j = 0; j < verticalSlides.length; j++ ) {\n\n\t\t\t\t// Stop as soon as we arrive at the present\n\t\t\t\tif( verticalSlides[j] === slide ) {\n\t\t\t\t\tbreak mainLoop;\n\t\t\t\t}\n\n\t\t\t\t// Don't count slides with the \"uncounted\" class\n\t\t\t\tif( verticalSlides[j].dataset.visibility !== 'uncounted' ) {\n\t\t\t\t\tpastCount++;\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// Stop as soon as we arrive at the present\n\t\t\tif( horizontalSlide === slide ) {\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\t// Don't count the wrapping section for vertical slides and\n\t\t\t// slides marked as uncounted\n\t\t\tif( horizontalSlide.classList.contains( 'stack' ) === false && horizontalSlide.dataset.visibility !== 'uncounted' ) {\n\t\t\t\tpastCount++;\n\t\t\t}\n\n\t\t}\n\n\t\treturn pastCount;\n\n\t}\n\n\t/**\n\t * Returns a value ranging from 0-1 that represents\n\t * how far into the presentation we have navigated.\n\t *\n\t * @return {number}\n\t */\n\tfunction getProgress() {\n\n\t\t// The number of past and total slides\n\t\tlet totalCount = getTotalSlides();\n\t\tlet pastCount = getSlidePastCount();\n\n\t\tif( currentSlide ) {\n\n\t\t\tlet allFragments = currentSlide.querySelectorAll( '.fragment' );\n\n\t\t\t// If there are fragments in the current slide those should be\n\t\t\t// accounted for in the progress.\n\t\t\tif( allFragments.length > 0 ) {\n\t\t\t\tlet visibleFragments = currentSlide.querySelectorAll( '.fragment.visible' );\n\n\t\t\t\t// This value represents how big a portion of the slide progress\n\t\t\t\t// that is made up by its fragments (0-1)\n\t\t\t\tlet fragmentWeight = 0.9;\n\n\t\t\t\t// Add fragment progress to the past slide count\n\t\t\t\tpastCount += ( visibleFragments.length / allFragments.length ) * fragmentWeight;\n\t\t\t}\n\n\t\t}\n\n\t\treturn Math.min( pastCount / ( totalCount - 1 ), 1 );\n\n\t}\n\n\t/**\n\t * Retrieves the h/v location and fragment of the current,\n\t * or specified, slide.\n\t *\n\t * @param {HTMLElement} [slide] If specified, the returned\n\t * index will be for this slide rather than the currently\n\t * active one\n\t *\n\t * @return {{h: number, v: number, f: number}}\n\t */\n\tfunction getIndices( slide ) {\n\n\t\t// By default, return the current indices\n\t\tlet h = indexh,\n\t\t\tv = indexv,\n\t\t\tf;\n\n\t\t// If a slide is specified, return the indices of that slide\n\t\tif( slide ) {\n\t\t\t// In scroll mode the original h/x index is stored on the slide\n\t\t\tif( scrollView.isActive() ) {\n\t\t\t\th = parseInt( slide.getAttribute( 'data-index-h' ), 10 );\n\n\t\t\t\tif( slide.getAttribute( 'data-index-v' ) ) {\n\t\t\t\t\tv = parseInt( slide.getAttribute( 'data-index-v' ), 10 );\n\t\t\t\t}\n\t\t\t}\n\t\t\telse {\n\t\t\t\tlet isVertical = isVerticalSlide( slide );\n\t\t\t\tlet slideh = isVertical ? slide.parentNode : slide;\n\n\t\t\t\t// Select all horizontal slides\n\t\t\t\tlet horizontalSlides = getHorizontalSlides();\n\n\t\t\t\t// Now that we know which the horizontal slide is, get its index\n\t\t\t\th = Math.max( horizontalSlides.indexOf( slideh ), 0 );\n\n\t\t\t\t// Assume we're not vertical\n\t\t\t\tv = undefined;\n\n\t\t\t\t// If this is a vertical slide, grab the vertical index\n\t\t\t\tif( isVertical ) {\n\t\t\t\t\tv = Math.max( Util.queryAll( slide.parentNode, 'section' ).indexOf( slide ), 0 );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif( !slide && currentSlide ) {\n\t\t\tlet hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0;\n\t\t\tif( hasFragments ) {\n\t\t\t\tlet currentFragment = currentSlide.querySelector( '.current-fragment' );\n\t\t\t\tif( currentFragment && currentFragment.hasAttribute( 'data-fragment-index' ) ) {\n\t\t\t\t\tf = parseInt( currentFragment.getAttribute( 'data-fragment-index' ), 10 );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tf = currentSlide.querySelectorAll( '.fragment.visible' ).length - 1;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn { h, v, f };\n\n\t}\n\n\t/**\n\t * Retrieves all slides in this presentation.\n\t */\n\tfunction getSlides() {\n\n\t\treturn Util.queryAll( dom.wrapper, SLIDES_SELECTOR + ':not(.stack):not([data-visibility=\"uncounted\"])' );\n\n\t}\n\n\t/**\n\t * Returns a list of all horizontal slides in the deck. Each\n\t * vertical stack is included as one horizontal slide in the\n\t * resulting array.\n\t */\n\tfunction getHorizontalSlides() {\n\n\t\treturn Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR );\n\n\t}\n\n\t/**\n\t * Returns all vertical slides that exist within this deck.\n\t */\n\tfunction getVerticalSlides() {\n\n\t\treturn Util.queryAll( dom.wrapper, '.slides>section>section' );\n\n\t}\n\n\t/**\n\t * Returns all vertical stacks (each stack can contain multiple slides).\n\t */\n\tfunction getVerticalStacks() {\n\n\t\treturn Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.stack');\n\n\t}\n\n\t/**\n\t * Returns true if there are at least two horizontal slides.\n\t */\n\tfunction hasHorizontalSlides() {\n\n\t\treturn getHorizontalSlides().length > 1;\n\t}\n\n\t/**\n\t * Returns true if there are at least two vertical slides.\n\t */\n\tfunction hasVerticalSlides() {\n\n\t\treturn getVerticalSlides().length > 1;\n\n\t}\n\n\t/**\n\t * Returns an array of objects where each object represents the\n\t * attributes on its respective slide.\n\t */\n\tfunction getSlidesAttributes() {\n\n\t\treturn getSlides().map( slide => {\n\n\t\t\tlet attributes = {};\n\t\t\tfor( let i = 0; i < slide.attributes.length; i++ ) {\n\t\t\t\tlet attribute = slide.attributes[ i ];\n\t\t\t\tattributes[ attribute.name ] = attribute.value;\n\t\t\t}\n\t\t\treturn attributes;\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Retrieves the total number of slides in this presentation.\n\t *\n\t * @return {number}\n\t */\n\tfunction getTotalSlides() {\n\n\t\treturn getSlides().length;\n\n\t}\n\n\t/**\n\t * Returns the slide element matching the specified index.\n\t *\n\t * @return {HTMLElement}\n\t */\n\tfunction getSlide( x, y ) {\n\n\t\tlet horizontalSlide = getHorizontalSlides()[ x ];\n\t\tlet verticalSlides = horizontalSlide && horizontalSlide.querySelectorAll( 'section' );\n\n\t\tif( verticalSlides && verticalSlides.length && typeof y === 'number' ) {\n\t\t\treturn verticalSlides ? verticalSlides[ y ] : undefined;\n\t\t}\n\n\t\treturn horizontalSlide;\n\n\t}\n\n\t/**\n\t * Returns the background element for the given slide.\n\t * All slides, even the ones with no background properties\n\t * defined, have a background element so as long as the\n\t * index is valid an element will be returned.\n\t *\n\t * @param {mixed} x Horizontal background index OR a slide\n\t * HTML element\n\t * @param {number} y Vertical background index\n\t * @return {(HTMLElement[]|*)}\n\t */\n\tfunction getSlideBackground( x, y ) {\n\n\t\tlet slide = typeof x === 'number' ? getSlide( x, y ) : x;\n\t\tif( slide ) {\n\t\t\treturn slide.slideBackgroundElement;\n\t\t}\n\n\t\treturn undefined;\n\n\t}\n\n\t/**\n\t * Retrieves the current state of the presentation as\n\t * an object. This state can then be restored at any\n\t * time.\n\t *\n\t * @return {{indexh: number, indexv: number, indexf: number, paused: boolean, overview: boolean}}\n\t */\n\tfunction getState() {\n\n\t\tlet indices = getIndices();\n\n\t\treturn {\n\t\t\tindexh: indices.h,\n\t\t\tindexv: indices.v,\n\t\t\tindexf: indices.f,\n\t\t\tpaused: isPaused(),\n\t\t\toverview: overview.isActive()\n\t\t};\n\n\t}\n\n\t/**\n\t * Restores the presentation to the given state.\n\t *\n\t * @param {object} state As generated by getState()\n\t * @see {@link getState} generates the parameter `state`\n\t */\n\tfunction setState( state ) {\n\n\t\tif( typeof state === 'object' ) {\n\t\t\tslide( Util.deserialize( state.indexh ), Util.deserialize( state.indexv ), Util.deserialize( state.indexf ) );\n\n\t\t\tlet pausedFlag = Util.deserialize( state.paused ),\n\t\t\t\toverviewFlag = Util.deserialize( state.overview );\n\n\t\t\tif( typeof pausedFlag === 'boolean' && pausedFlag !== isPaused() ) {\n\t\t\t\ttogglePause( pausedFlag );\n\t\t\t}\n\n\t\t\tif( typeof overviewFlag === 'boolean' && overviewFlag !== overview.isActive() ) {\n\t\t\t\toverview.toggle( overviewFlag );\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Cues a new automated slide if enabled in the config.\n\t */\n\tfunction cueAutoSlide() {\n\n\t\tcancelAutoSlide();\n\n\t\tif( currentSlide && config.autoSlide !== false ) {\n\n\t\t\tlet fragment = currentSlide.querySelector( '.current-fragment[data-autoslide]' );\n\n\t\t\tlet fragmentAutoSlide = fragment ? fragment.getAttribute( 'data-autoslide' ) : null;\n\t\t\tlet parentAutoSlide = currentSlide.parentNode ? currentSlide.parentNode.getAttribute( 'data-autoslide' ) : null;\n\t\t\tlet slideAutoSlide = currentSlide.getAttribute( 'data-autoslide' );\n\n\t\t\t// Pick value in the following priority order:\n\t\t\t// 1. Current fragment's data-autoslide\n\t\t\t// 2. Current slide's data-autoslide\n\t\t\t// 3. Parent slide's data-autoslide\n\t\t\t// 4. Global autoSlide setting\n\t\t\tif( fragmentAutoSlide ) {\n\t\t\t\tautoSlide = parseInt( fragmentAutoSlide, 10 );\n\t\t\t}\n\t\t\telse if( slideAutoSlide ) {\n\t\t\t\tautoSlide = parseInt( slideAutoSlide, 10 );\n\t\t\t}\n\t\t\telse if( parentAutoSlide ) {\n\t\t\t\tautoSlide = parseInt( parentAutoSlide, 10 );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tautoSlide = config.autoSlide;\n\n\t\t\t\t// If there are media elements with data-autoplay,\n\t\t\t\t// automatically set the autoSlide duration to the\n\t\t\t\t// length of that media. Not applicable if the slide\n\t\t\t\t// is divided up into fragments.\n\t\t\t\t// playbackRate is accounted for in the duration.\n\t\t\t\tif( currentSlide.querySelectorAll( '.fragment' ).length === 0 ) {\n\t\t\t\t\tUtil.queryAll( currentSlide, 'video, audio' ).forEach( el => {\n\t\t\t\t\t\tif( el.hasAttribute( 'data-autoplay' ) ) {\n\t\t\t\t\t\t\tif( autoSlide && (el.duration * 1000 / el.playbackRate ) > autoSlide ) {\n\t\t\t\t\t\t\t\tautoSlide = ( el.duration * 1000 / el.playbackRate ) + 1000;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Cue the next auto-slide if:\n\t\t\t// - There is an autoSlide value\n\t\t\t// - Auto-sliding isn't paused by the user\n\t\t\t// - The presentation isn't paused\n\t\t\t// - The overview isn't active\n\t\t\t// - The presentation isn't over\n\t\t\tif( autoSlide && !autoSlidePaused && !isPaused() && !overview.isActive() && ( !isLastSlide() || fragments.availableRoutes().next || config.loop === true ) ) {\n\t\t\t\tautoSlideTimeout = setTimeout( () => {\n\t\t\t\t\tif( typeof config.autoSlideMethod === 'function' ) {\n\t\t\t\t\t\tconfig.autoSlideMethod()\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tnavigateNext();\n\t\t\t\t\t}\n\t\t\t\t\tcueAutoSlide();\n\t\t\t\t}, autoSlide );\n\t\t\t\tautoSlideStartTime = Date.now();\n\t\t\t}\n\n\t\t\tif( autoSlidePlayer ) {\n\t\t\t\tautoSlidePlayer.setPlaying( autoSlideTimeout !== -1 );\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Cancels any ongoing request to auto-slide.\n\t */\n\tfunction cancelAutoSlide() {\n\n\t\tclearTimeout( autoSlideTimeout );\n\t\tautoSlideTimeout = -1;\n\n\t}\n\n\tfunction pauseAutoSlide() {\n\n\t\tif( autoSlide && !autoSlidePaused ) {\n\t\t\tautoSlidePaused = true;\n\t\t\tdispatchEvent({ type: 'autoslidepaused' });\n\t\t\tclearTimeout( autoSlideTimeout );\n\n\t\t\tif( autoSlidePlayer ) {\n\t\t\t\tautoSlidePlayer.setPlaying( false );\n\t\t\t}\n\t\t}\n\n\t}\n\n\tfunction resumeAutoSlide() {\n\n\t\tif( autoSlide && autoSlidePaused ) {\n\t\t\tautoSlidePaused = false;\n\t\t\tdispatchEvent({ type: 'autoslideresumed' });\n\t\t\tcueAutoSlide();\n\t\t}\n\n\t}\n\n\tfunction navigateLeft({skipFragments=false}={}) {\n\n\t\tnavigationHistory.hasNavigatedHorizontally = true;\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.prev();\n\n\t\t// Reverse for RTL\n\t\tif( config.rtl ) {\n\t\t\tif( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().left ) {\n\t\t\t\tslide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );\n\t\t\t}\n\t\t}\n\t\t// Normal navigation\n\t\telse if( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().left ) {\n\t\t\tslide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );\n\t\t}\n\n\t}\n\n\tfunction navigateRight({skipFragments=false}={}) {\n\n\t\tnavigationHistory.hasNavigatedHorizontally = true;\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.next();\n\n\t\t// Reverse for RTL\n\t\tif( config.rtl ) {\n\t\t\tif( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().right ) {\n\t\t\t\tslide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );\n\t\t\t}\n\t\t}\n\t\t// Normal navigation\n\t\telse if( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().right ) {\n\t\t\tslide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );\n\t\t}\n\n\t}\n\n\tfunction navigateUp({skipFragments=false}={}) {\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.prev();\n\n\t\t// Prioritize hiding fragments\n\t\tif( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().up ) {\n\t\t\tslide( indexh, indexv - 1 );\n\t\t}\n\n\t}\n\n\tfunction navigateDown({skipFragments=false}={}) {\n\n\t\tnavigationHistory.hasNavigatedVertically = true;\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.next();\n\n\t\t// Prioritize revealing fragments\n\t\tif( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().down ) {\n\t\t\tslide( indexh, indexv + 1 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Navigates backwards, prioritized in the following order:\n\t * 1) Previous fragment\n\t * 2) Previous vertical slide\n\t * 3) Previous horizontal slide\n\t */\n\tfunction navigatePrev({skipFragments=false}={}) {\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.prev();\n\n\t\t// Prioritize revealing fragments\n\t\tif( skipFragments || fragments.prev() === false ) {\n\t\t\tif( availableRoutes().up ) {\n\t\t\t\tnavigateUp({skipFragments});\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// Fetch the previous horizontal slide, if there is one\n\t\t\t\tlet previousSlide;\n\n\t\t\t\tif( config.rtl ) {\n\t\t\t\t\tpreviousSlide = Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.future' ).pop();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tpreviousSlide = Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.past' ).pop();\n\t\t\t\t}\n\n\t\t\t\t// When going backwards and arriving on a stack we start\n\t\t\t\t// at the bottom of the stack\n\t\t\t\tif( previousSlide && previousSlide.classList.contains( 'stack' ) ) {\n\t\t\t\t\tlet v = ( previousSlide.querySelectorAll( 'section' ).length - 1 ) || undefined;\n\t\t\t\t\tlet h = indexh - 1;\n\t\t\t\t\tslide( h, v );\n\t\t\t\t}\n\t\t\t\telse if( config.rtl ) {\n\t\t\t\t\tnavigateRight({skipFragments});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tnavigateLeft({skipFragments});\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * The reverse of #navigatePrev().\n\t */\n\tfunction navigateNext({skipFragments=false}={}) {\n\n\t\tnavigationHistory.hasNavigatedHorizontally = true;\n\t\tnavigationHistory.hasNavigatedVertically = true;\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.next();\n\n\t\t// Prioritize revealing fragments\n\t\tif( skipFragments || fragments.next() === false ) {\n\n\t\t\tlet routes = availableRoutes();\n\n\t\t\t// When looping is enabled `routes.down` is always available\n\t\t\t// so we need a separate check for when we've reached the\n\t\t\t// end of a stack and should move horizontally\n\t\t\tif( routes.down && routes.right && config.loop && isLastVerticalSlide() ) {\n\t\t\t\troutes.down = false;\n\t\t\t}\n\n\t\t\tif( routes.down ) {\n\t\t\t\tnavigateDown({skipFragments});\n\t\t\t}\n\t\t\telse if( config.rtl ) {\n\t\t\t\tnavigateLeft({skipFragments});\n\t\t\t}\n\t\t\telse {\n\t\t\t\tnavigateRight({skipFragments});\n\t\t\t}\n\t\t}\n\n\t}\n\n\n\t// --------------------------------------------------------------------//\n\t// ----------------------------- EVENTS -------------------------------//\n\t// --------------------------------------------------------------------//\n\n\t/**\n\t * Called by all event handlers that are based on user\n\t * input.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onUserInput( event ) {\n\n\t\tif( config.autoSlideStoppable ) {\n\t\t\tpauseAutoSlide();\n\t\t}\n\n\t}\n\n\t/**\n\t* Listener for post message events posted to this window.\n\t*/\n\tfunction onPostMessage( event ) {\n\n\t\tlet data = event.data;\n\n\t\t// Make sure we're dealing with JSON\n\t\tif( typeof data === 'string' && data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) {\n\t\t\tdata = JSON.parse( data );\n\n\t\t\t// Check if the requested method can be found\n\t\t\tif( data.method && typeof Reveal[data.method] === 'function' ) {\n\n\t\t\t\tif( POST_MESSAGE_METHOD_BLACKLIST.test( data.method ) === false ) {\n\n\t\t\t\t\tconst result = Reveal[data.method].apply( Reveal, data.args );\n\n\t\t\t\t\t// Dispatch a postMessage event with the returned value from\n\t\t\t\t\t// our method invocation for getter functions\n\t\t\t\t\tdispatchPostMessage( 'callback', { method: data.method, result: result } );\n\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tconsole.warn( 'reveal.js: \"'+ data.method +'\" is is blacklisted from the postMessage API' );\n\t\t\t\t}\n\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Event listener for transition end on the current slide.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onTransitionEnd( event ) {\n\n\t\tif( transition === 'running' && /section/gi.test( event.target.nodeName ) ) {\n\t\t\ttransition = 'idle';\n\t\t\tdispatchEvent({\n\t\t\t\ttype: 'slidetransitionend',\n\t\t\t\tdata: { indexh, indexv, previousSlide, currentSlide }\n\t\t\t});\n\t\t}\n\n\t}\n\n\t/**\n\t * A global listener for all click events inside of the\n\t * .slides container.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onSlidesClicked( event ) {\n\n\t\tconst anchor = Util.closest( event.target, 'a[href^=\"#\"]' );\n\n\t\t// If a hash link is clicked, we find the target slide\n\t\t// and navigate to it. We previously relied on 'hashchange'\n\t\t// for links like these but that prevented media with\n\t\t// audio tracks from playing in mobile browsers since it\n\t\t// wasn't considered a direct interaction with the document.\n\t\tif( anchor ) {\n\t\t\tconst hash = anchor.getAttribute( 'href' );\n\t\t\tconst indices = location.getIndicesFromHash( hash );\n\n\t\t\tif( indices ) {\n\t\t\t\tReveal.slide( indices.h, indices.v, indices.f );\n\t\t\t\tevent.preventDefault();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Handler for the window level 'resize' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onWindowResize( event ) {\n\n\t\tlayout();\n\t}\n\n\t/**\n\t * Handle for the window level 'visibilitychange' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onPageVisibilityChange( event ) {\n\n\t\t// If, after clicking a link or similar and we're coming back,\n\t\t// focus the document.body to ensure we can use keyboard shortcuts\n\t\tif( document.hidden === false && document.activeElement !== document.body ) {\n\t\t\t// Not all elements support .blur() - SVGs among them.\n\t\t\tif( typeof document.activeElement.blur === 'function' ) {\n\t\t\t\tdocument.activeElement.blur();\n\t\t\t}\n\t\t\tdocument.body.focus();\n\t\t}\n\n\t}\n\n\t/**\n\t * Handler for the document level 'fullscreenchange' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onFullscreenChange( event ) {\n\n\t\tlet element = document.fullscreenElement || document.webkitFullscreenElement;\n\t\tif( element === dom.wrapper ) {\n\t\t\tevent.stopImmediatePropagation();\n\n\t\t\t// Timeout to avoid layout shift in Safari\n\t\t\tsetTimeout( () => {\n\t\t\t\tReveal.layout();\n\t\t\t\tReveal.focus.focus(); // focus.focus :'(\n\t\t\t}, 1 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Handles clicks on links that are set to preview in the\n\t * iframe overlay.\n\t *\n\t * @param {object} event\n\t */\n\tfunction onPreviewLinkClicked( event ) {\n\n\t\tif( event.currentTarget && event.currentTarget.hasAttribute( 'href' ) ) {\n\t\t\tlet url = event.currentTarget.getAttribute( 'href' );\n\t\t\tif( url ) {\n\t\t\t\tshowPreview( url );\n\t\t\t\tevent.preventDefault();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Handles click on the auto-sliding controls element.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onAutoSlidePlayerClick( event ) {\n\n\t\t// Replay\n\t\tif( isLastSlide() && config.loop === false ) {\n\t\t\tslide( 0, 0 );\n\t\t\tresumeAutoSlide();\n\t\t}\n\t\t// Resume\n\t\telse if( autoSlidePaused ) {\n\t\t\tresumeAutoSlide();\n\t\t}\n\t\t// Pause\n\t\telse {\n\t\t\tpauseAutoSlide();\n\t\t}\n\n\t}\n\n\n\t// --------------------------------------------------------------------//\n\t// ------------------------------- API --------------------------------//\n\t// --------------------------------------------------------------------//\n\n\t// The public reveal.js API\n\tconst API = {\n\t\tVERSION,\n\n\t\tinitialize,\n\t\tconfigure,\n\t\tdestroy,\n\n\t\tsync,\n\t\tsyncSlide,\n\t\tsyncFragments: fragments.sync.bind( fragments ),\n\n\t\t// Navigation methods\n\t\tslide,\n\t\tleft: navigateLeft,\n\t\tright: navigateRight,\n\t\tup: navigateUp,\n\t\tdown: navigateDown,\n\t\tprev: navigatePrev,\n\t\tnext: navigateNext,\n\n\t\t// Navigation aliases\n\t\tnavigateLeft, navigateRight, navigateUp, navigateDown, navigatePrev, navigateNext,\n\n\t\t// Fragment methods\n\t\tnavigateFragment: fragments.goto.bind( fragments ),\n\t\tprevFragment: fragments.prev.bind( fragments ),\n\t\tnextFragment: fragments.next.bind( fragments ),\n\n\t\t// Event binding\n\t\ton,\n\t\toff,\n\n\t\t// Legacy event binding methods left in for backwards compatibility\n\t\taddEventListener: on,\n\t\tremoveEventListener: off,\n\n\t\t// Forces an update in slide layout\n\t\tlayout,\n\n\t\t// Randomizes the order of slides\n\t\tshuffle,\n\n\t\t// Returns an object with the available routes as booleans (left/right/top/bottom)\n\t\tavailableRoutes,\n\n\t\t// Returns an object with the available fragments as booleans (prev/next)\n\t\tavailableFragments: fragments.availableRoutes.bind( fragments ),\n\n\t\t// Toggles a help overlay with keyboard shortcuts\n\t\ttoggleHelp,\n\n\t\t// Toggles the overview mode on/off\n\t\ttoggleOverview: overview.toggle.bind( overview ),\n\n\t\t// Toggles the scroll view on/off\n\t\ttoggleScrollView: scrollView.toggle.bind( scrollView ),\n\n\t\t// Toggles the \"black screen\" mode on/off\n\t\ttogglePause,\n\n\t\t// Toggles the auto slide mode on/off\n\t\ttoggleAutoSlide,\n\n\t\t// Toggles visibility of the jump-to-slide UI\n\t\ttoggleJumpToSlide,\n\n\t\t// Slide navigation checks\n\t\tisFirstSlide,\n\t\tisLastSlide,\n\t\tisLastVerticalSlide,\n\t\tisVerticalSlide,\n\t\tisVerticalStack,\n\n\t\t// State checks\n\t\tisPaused,\n\t\tisAutoSliding,\n\t\tisSpeakerNotes: notes.isSpeakerNotesWindow.bind( notes ),\n\t\tisOverview: overview.isActive.bind( overview ),\n\t\tisFocused: focus.isFocused.bind( focus ),\n\n\t\tisScrollView: scrollView.isActive.bind( scrollView ),\n\t\tisPrintView: printView.isActive.bind( printView ),\n\n\t\t// Checks if reveal.js has been loaded and is ready for use\n\t\tisReady: () => ready,\n\n\t\t// Slide preloading\n\t\tloadSlide: slideContent.load.bind( slideContent ),\n\t\tunloadSlide: slideContent.unload.bind( slideContent ),\n\n\t\t// Start/stop all media inside of the current slide\n\t\tstartEmbeddedContent: () => slideContent.startEmbeddedContent( currentSlide ),\n\t\tstopEmbeddedContent: () => slideContent.stopEmbeddedContent( currentSlide, { unloadIframes: false } ),\n\n\t\t// Preview management\n\t\tshowPreview,\n\t\thidePreview: closeOverlay,\n\n\t\t// Adds or removes all internal event listeners\n\t\taddEventListeners,\n\t\tremoveEventListeners,\n\t\tdispatchEvent,\n\n\t\t// Facility for persisting and restoring the presentation state\n\t\tgetState,\n\t\tsetState,\n\n\t\t// Presentation progress on range of 0-1\n\t\tgetProgress,\n\n\t\t// Returns the indices of the current, or specified, slide\n\t\tgetIndices,\n\n\t\t// Returns an Array of key:value maps of the attributes of each\n\t\t// slide in the deck\n\t\tgetSlidesAttributes,\n\n\t\t// Returns the number of slides that we have passed\n\t\tgetSlidePastCount,\n\n\t\t// Returns the total number of slides\n\t\tgetTotalSlides,\n\n\t\t// Returns the slide element at the specified index\n\t\tgetSlide,\n\n\t\t// Returns the previous slide element, may be null\n\t\tgetPreviousSlide: () => previousSlide,\n\n\t\t// Returns the current slide element\n\t\tgetCurrentSlide: () => currentSlide,\n\n\t\t// Returns the slide background element at the specified index\n\t\tgetSlideBackground,\n\n\t\t// Returns the speaker notes string for a slide, or null\n\t\tgetSlideNotes: notes.getSlideNotes.bind( notes ),\n\n\t\t// Returns an Array of all slides\n\t\tgetSlides,\n\n\t\t// Returns an array with all horizontal/vertical slides in the deck\n\t\tgetHorizontalSlides,\n\t\tgetVerticalSlides,\n\n\t\t// Checks if the presentation contains two or more horizontal\n\t\t// and vertical slides\n\t\thasHorizontalSlides,\n\t\thasVerticalSlides,\n\n\t\t// Checks if the deck has navigated on either axis at least once\n\t\thasNavigatedHorizontally: () => navigationHistory.hasNavigatedHorizontally,\n\t\thasNavigatedVertically: () => navigationHistory.hasNavigatedVertically,\n\n\t\tshouldAutoAnimateBetween,\n\n\t\t// Adds/removes a custom key binding\n\t\taddKeyBinding: keyboard.addKeyBinding.bind( keyboard ),\n\t\tremoveKeyBinding: keyboard.removeKeyBinding.bind( keyboard ),\n\n\t\t// Programmatically triggers a keyboard event\n\t\ttriggerKey: keyboard.triggerKey.bind( keyboard ),\n\n\t\t// Registers a new shortcut to include in the help overlay\n\t\tregisterKeyboardShortcut: keyboard.registerKeyboardShortcut.bind( keyboard ),\n\n\t\tgetComputedSlideSize,\n\t\tsetCurrentScrollPage,\n\n\t\t// Returns the current scale of the presentation content\n\t\tgetScale: () => scale,\n\n\t\t// Returns the current configuration object\n\t\tgetConfig: () => config,\n\n\t\t// Helper method, retrieves query string as a key:value map\n\t\tgetQueryHash: Util.getQueryHash,\n\n\t\t// Returns the path to the current slide as represented in the URL\n\t\tgetSlidePath: location.getHash.bind( location ),\n\n\t\t// Returns reveal.js DOM elements\n\t\tgetRevealElement: () => revealElement,\n\t\tgetSlidesElement: () => dom.slides,\n\t\tgetViewportElement: () => dom.viewport,\n\t\tgetBackgroundsElement: () => backgrounds.element,\n\n\t\t// API for registering and retrieving plugins\n\t\tregisterPlugin: plugins.registerPlugin.bind( plugins ),\n\t\thasPlugin: plugins.hasPlugin.bind( plugins ),\n\t\tgetPlugin: plugins.getPlugin.bind( plugins ),\n\t\tgetPlugins: plugins.getRegisteredPlugins.bind( plugins )\n\n\t};\n\n\t// Our internal API which controllers have access to\n\tUtil.extend( Reveal, {\n\t\t...API,\n\n\t\t// Methods for announcing content to screen readers\n\t\tannounceStatus,\n\t\tgetStatusText,\n\n\t\t// Controllers\n\t\tfocus,\n\t\tscroll: scrollView,\n\t\tprogress,\n\t\tcontrols,\n\t\tlocation,\n\t\toverview,\n\t\tfragments,\n\t\tbackgrounds,\n\t\tslideContent,\n\t\tslideNumber,\n\n\t\tonUserInput,\n\t\tcloseOverlay,\n\t\tupdateSlidesVisibility,\n\t\tlayoutSlideContents,\n\t\ttransformSlides,\n\t\tcueAutoSlide,\n\t\tcancelAutoSlide\n\t} );\n\n\treturn API;\n\n};\n","import Deck, { VERSION } from './reveal.js'\n\n/**\n * Expose the Reveal class to the window. To create a\n * new instance:\n * let deck = new Reveal( document.querySelector( '.reveal' ), {\n * controls: false\n * } );\n * deck.initialize().then(() => {\n * // reveal.js is ready\n * });\n */\nlet Reveal = Deck;\n\n\n/**\n * The below is a thin shell that mimics the pre 4.0\n * reveal.js API and ensures backwards compatibility.\n * This API only allows for one Reveal instance per\n * page, whereas the new API above lets you run many\n * presentations on the same page.\n *\n * Reveal.initialize( { controls: false } ).then(() => {\n * // reveal.js is ready\n * });\n */\n\nlet enqueuedAPICalls = [];\n\nReveal.initialize = options => {\n\n\t// Create our singleton reveal.js instance\n\tObject.assign( Reveal, new Deck( document.querySelector( '.reveal' ), options ) );\n\n\t// Invoke any enqueued API calls\n\tenqueuedAPICalls.map( method => method( Reveal ) );\n\n\treturn Reveal.initialize();\n\n}\n\n/**\n * The pre 4.0 API let you add event listener before\n * initializing. 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+\ No newline at end of file
diff --git a/_freeze/site_libs/revealjs/dist/reveal.js b/_freeze/site_libs/revealjs/dist/reveal.js
@@ -0,0 +1,9 @@
+/*!
+* reveal.js 5.1.0
+* https://revealjs.com
+* MIT licensed
+*
+* Copyright (C) 2011-2024 Hakim El Hattab, https://hakim.se
+*/
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e="undefined"!=typeof globalThis?globalThis:e||self).Reveal=t()}(this,(function(){"use strict";const e=(e,t)=>{for(let i in t)e[i]=t[i];return e},t=(e,t)=>Array.from(e.querySelectorAll(t)),i=(e,t,i)=>{i?e.classList.add(t):e.classList.remove(t)},s=e=>{if("string"==typeof e){if("null"===e)return null;if("true"===e)return!0;if("false"===e)return!1;if(e.match(/^-?[\d\.]+$/))return parseFloat(e)}return e},a=(e,t)=>{e.style.transform=t},n=(e,t)=>{let i=e.matches||e.matchesSelector||e.msMatchesSelector;return!(!i||!i.call(e,t))},r=(e,t)=>{if("function"==typeof e.closest)return e.closest(t);for(;e;){if(n(e,t))return e;e=e.parentNode}return null},o=e=>{let t=(e=e||document.documentElement).requestFullscreen||e.webkitRequestFullscreen||e.webkitRequestFullScreen||e.mozRequestFullScreen||e.msRequestFullscreen;t&&t.apply(e)},l=e=>{let 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n=this.getContrastClass(e);"string"==typeof n&&e.classList.add(n)}getContrastClass(e){const t=e.slideBackgroundElement;let i=e.getAttribute("data-background-color");if(!i||!A(i)){let e=window.getComputedStyle(t);e&&e.backgroundColor&&(i=e.backgroundColor)}if(i){const e=A(i);if(e&&0!==e.a)return"string"==typeof(s=i)&&(s=A(s)),(s?(299*s.r+587*s.g+114*s.b)/1e3:null)<128?"has-dark-background":"has-light-background"}var s;return null}bubbleSlideContrastClassToElement(e,t){["has-light-background","has-dark-background"].forEach((i=>{e.classList.contains(i)?t.classList.add(i):t.classList.remove(i)}),this)}update(e=!1){let i=this.Reveal.getConfig(),s=this.Reveal.getCurrentSlide(),a=this.Reveal.getIndices(),n=null,r=i.rtl?"future":"past",o=i.rtl?"past":"future";if(Array.from(this.element.childNodes).forEach(((i,s)=>{i.classList.remove("past","present","future"),s<a.h?i.classList.add(r):s>a.h?i.classList.add(o):(i.classList.add("present"),n=i),(e||s===a.h)&&t(i,".slide-background").forEach(((e,t)=>{e.classList.remove("past","present","future");const i="number"==typeof a.v?a.v:0;t<i?e.classList.add("past"):t>i?e.classList.add("future"):(e.classList.add("present"),s===a.h&&(n=e))}))})),this.previousBackground&&!this.previousBackground.closest("body")&&(this.previousBackground=null),n&&this.previousBackground){let e=this.previousBackground.getAttribute("data-background-hash"),t=n.getAttribute("data-background-hash");if(t&&t===e&&n!==this.previousBackground){this.element.classList.add("no-transition");const e=n.querySelector("video"),t=this.previousBackground.querySelector("video");if(e&&t){const i=e.parentNode;t.parentNode.appendChild(e),i.appendChild(t)}}}if(this.previousBackground&&this.Reveal.slideContent.stopEmbeddedContent(this.previousBackground,{unloadIframes:!this.Reveal.slideContent.shouldPreload(this.previousBackground)}),n){this.Reveal.slideContent.startEmbeddedContent(n);let e=n.querySelector(".slide-background-content");if(e){let t=e.style.backgroundImage||"";/\.gif/i.test(t)&&(e.style.backgroundImage="",window.getComputedStyle(e).opacity,e.style.backgroundImage=t)}this.previousBackground=n}s&&this.bubbleSlideContrastClassToElement(s,this.Reveal.getRevealElement()),setTimeout((()=>{this.element.classList.remove("no-transition")}),10)}updateParallax(){let e=this.Reveal.getIndices();if(this.Reveal.getConfig().parallaxBackgroundImage){let t,i,s=this.Reveal.getHorizontalSlides(),a=this.Reveal.getVerticalSlides(),n=this.element.style.backgroundSize.split(" ");1===n.length?t=i=parseInt(n[0],10):(t=parseInt(n[0],10),i=parseInt(n[1],10));let r,o,l=this.element.offsetWidth,d=s.length;r="number"==typeof this.Reveal.getConfig().parallaxBackgroundHorizontal?this.Reveal.getConfig().parallaxBackgroundHorizontal:d>1?(t-l)/(d-1):0,o=r*e.h*-1;let c,h,u=this.element.offsetHeight,g=a.length;c="number"==typeof this.Reveal.getConfig().parallaxBackgroundVertical?this.Reveal.getConfig().parallaxBackgroundVertical:(i-u)/(g-1),h=g>0?c*e.v:0,this.element.style.backgroundPosition=o+"px "+-h+"px"}}destroy(){this.element.remove()}}let k=0;class L{constructor(e){this.Reveal=e}run(e,t){this.reset();let i=this.Reveal.getSlides(),s=i.indexOf(t),a=i.indexOf(e);if(e&&t&&e.hasAttribute("data-auto-animate")&&t.hasAttribute("data-auto-animate")&&e.getAttribute("data-auto-animate-id")===t.getAttribute("data-auto-animate-id")&&!(s>a?t:e).hasAttribute("data-auto-animate-restart")){this.autoAnimateStyleSheet=this.autoAnimateStyleSheet||l();let i=this.getAutoAnimateOptions(t);e.dataset.autoAnimate="pending",t.dataset.autoAnimate="pending",i.slideDirection=s>a?"forward":"backward";let n="none"===e.style.display;n&&(e.style.display=this.Reveal.getConfig().display);let r=this.getAutoAnimatableElements(e,t).map((e=>this.autoAnimateElements(e.from,e.to,e.options||{},i,k++)));if(n&&(e.style.display="none"),"false"!==t.dataset.autoAnimateUnmatched&&!0===this.Reveal.getConfig().autoAnimateUnmatched){let e=.8*i.duration,s=.2*i.duration;this.getUnmatchedAutoAnimateElements(t).forEach((e=>{let t=this.getAutoAnimateOptions(e,i),s="unmatched";t.duration===i.duration&&t.delay===i.delay||(s="unmatched-"+k++,r.push(`[data-auto-animate="running"] [data-auto-animate-target="${s}"] { transition: opacity ${t.duration}s ease ${t.delay}s; }`)),e.dataset.autoAnimateTarget=s}),this),r.push(`[data-auto-animate="running"] [data-auto-animate-target="unmatched"] { transition: opacity ${e}s ease ${s}s; }`)}this.autoAnimateStyleSheet.innerHTML=r.join(""),requestAnimationFrame((()=>{this.autoAnimateStyleSheet&&(getComputedStyle(this.autoAnimateStyleSheet).fontWeight,t.dataset.autoAnimate="running")})),this.Reveal.dispatchEvent({type:"autoanimate",data:{fromSlide:e,toSlide:t,sheet:this.autoAnimateStyleSheet}})}}reset(){t(this.Reveal.getRevealElement(),'[data-auto-animate]:not([data-auto-animate=""])').forEach((e=>{e.dataset.autoAnimate=""})),t(this.Reveal.getRevealElement(),"[data-auto-animate-target]").forEach((e=>{delete e.dataset.autoAnimateTarget})),this.autoAnimateStyleSheet&&this.autoAnimateStyleSheet.parentNode&&(this.autoAnimateStyleSheet.parentNode.removeChild(this.autoAnimateStyleSheet),this.autoAnimateStyleSheet=null)}autoAnimateElements(e,t,i,s,a){e.dataset.autoAnimateTarget="",t.dataset.autoAnimateTarget=a;let n=this.getAutoAnimateOptions(t,s);void 0!==i.delay&&(n.delay=i.delay),void 0!==i.duration&&(n.duration=i.duration),void 0!==i.easing&&(n.easing=i.easing);let r=this.getAutoAnimatableProperties("from",e,i),o=this.getAutoAnimatableProperties("to",t,i);if(t.classList.contains("fragment")&&(delete o.styles.opacity,e.classList.contains("fragment"))){(e.className.match(w)||[""])[0]===(t.className.match(w)||[""])[0]&&"forward"===s.slideDirection&&t.classList.add("visible","disabled")}if(!1!==i.translate||!1!==i.scale){let e=this.Reveal.getScale(),t={x:(r.x-o.x)/e,y:(r.y-o.y)/e,scaleX:r.width/o.width,scaleY:r.height/o.height};t.x=Math.round(1e3*t.x)/1e3,t.y=Math.round(1e3*t.y)/1e3,t.scaleX=Math.round(1e3*t.scaleX)/1e3,t.scaleX=Math.round(1e3*t.scaleX)/1e3;let s=!1!==i.translate&&(0!==t.x||0!==t.y),a=!1!==i.scale&&(0!==t.scaleX||0!==t.scaleY);if(s||a){let e=[];s&&e.push(`translate(${t.x}px, ${t.y}px)`),a&&e.push(`scale(${t.scaleX}, ${t.scaleY})`),r.styles.transform=e.join(" "),r.styles["transform-origin"]="top left",o.styles.transform="none"}}for(let e in o.styles){const t=o.styles[e],i=r.styles[e];t===i?delete o.styles[e]:(!0===t.explicitValue&&(o.styles[e]=t.value),!0===i.explicitValue&&(r.styles[e]=i.value))}let l="",d=Object.keys(o.styles);if(d.length>0){r.styles.transition="none",o.styles.transition=`all ${n.duration}s ${n.easing} ${n.delay}s`,o.styles["transition-property"]=d.join(", "),o.styles["will-change"]=d.join(", "),l='[data-auto-animate-target="'+a+'"] {'+Object.keys(r.styles).map((e=>e+": "+r.styles[e]+" !important;")).join("")+'}[data-auto-animate="running"] [data-auto-animate-target="'+a+'"] {'+Object.keys(o.styles).map((e=>e+": "+o.styles[e]+" !important;")).join("")+"}"}return l}getAutoAnimateOptions(t,i){let s={easing:this.Reveal.getConfig().autoAnimateEasing,duration:this.Reveal.getConfig().autoAnimateDuration,delay:0};if(s=e(s,i),t.parentNode){let e=r(t.parentNode,"[data-auto-animate-target]");e&&(s=this.getAutoAnimateOptions(e,s))}return t.dataset.autoAnimateEasing&&(s.easing=t.dataset.autoAnimateEasing),t.dataset.autoAnimateDuration&&(s.duration=parseFloat(t.dataset.autoAnimateDuration)),t.dataset.autoAnimateDelay&&(s.delay=parseFloat(t.dataset.autoAnimateDelay)),s}getAutoAnimatableProperties(e,t,i){let s=this.Reveal.getConfig(),a={styles:[]};if(!1!==i.translate||!1!==i.scale){let e;if("function"==typeof i.measure)e=i.measure(t);else if(s.center)e=t.getBoundingClientRect();else{let i=this.Reveal.getScale();e={x:t.offsetLeft*i,y:t.offsetTop*i,width:t.offsetWidth*i,height:t.offsetHeight*i}}a.x=e.x,a.y=e.y,a.width=e.width,a.height=e.height}const n=getComputedStyle(t);return(i.styles||s.autoAnimateStyles).forEach((t=>{let i;"string"==typeof t&&(t={property:t}),void 0!==t.from&&"from"===e?i={value:t.from,explicitValue:!0}:void 0!==t.to&&"to"===e?i={value:t.to,explicitValue:!0}:("line-height"===t.property&&(i=parseFloat(n["line-height"])/parseFloat(n["font-size"])),isNaN(i)&&(i=n[t.property])),""!==i&&(a.styles[t.property]=i)})),a}getAutoAnimatableElements(e,t){let i=("function"==typeof this.Reveal.getConfig().autoAnimateMatcher?this.Reveal.getConfig().autoAnimateMatcher:this.getAutoAnimatePairs).call(this,e,t),s=[];return i.filter(((e,t)=>{if(-1===s.indexOf(e.to))return s.push(e.to),!0}))}getAutoAnimatePairs(e,t){let i=[];const s="h1, h2, h3, h4, h5, h6, p, li";return this.findAutoAnimateMatches(i,e,t,"[data-id]",(e=>e.nodeName+":::"+e.getAttribute("data-id"))),this.findAutoAnimateMatches(i,e,t,s,(e=>e.nodeName+":::"+e.innerText)),this.findAutoAnimateMatches(i,e,t,"img, video, iframe",(e=>e.nodeName+":::"+(e.getAttribute("src")||e.getAttribute("data-src")))),this.findAutoAnimateMatches(i,e,t,"pre",(e=>e.nodeName+":::"+e.innerText)),i.forEach((e=>{n(e.from,s)?e.options={scale:!1}:n(e.from,"pre")&&(e.options={scale:!1,styles:["width","height"]},this.findAutoAnimateMatches(i,e.from,e.to,".hljs .hljs-ln-code",(e=>e.textContent),{scale:!1,styles:[],measure:this.getLocalBoundingBox.bind(this)}),this.findAutoAnimateMatches(i,e.from,e.to,".hljs .hljs-ln-numbers[data-line-number]",(e=>e.getAttribute("data-line-number")),{scale:!1,styles:["width"],measure:this.getLocalBoundingBox.bind(this)}))}),this),i}getLocalBoundingBox(e){const t=this.Reveal.getScale();return{x:Math.round(e.offsetLeft*t*100)/100,y:Math.round(e.offsetTop*t*100)/100,width:Math.round(e.offsetWidth*t*100)/100,height:Math.round(e.offsetHeight*t*100)/100}}findAutoAnimateMatches(e,t,i,s,a,n){let r={},o={};[].slice.call(t.querySelectorAll(s)).forEach(((e,t)=>{const i=a(e);"string"==typeof i&&i.length&&(r[i]=r[i]||[],r[i].push(e))})),[].slice.call(i.querySelectorAll(s)).forEach(((t,i)=>{const s=a(t);let l;if(o[s]=o[s]||[],o[s].push(t),r[s]){const e=o[s].length-1,t=r[s].length-1;r[s][e]?(l=r[s][e],r[s][e]=null):r[s][t]&&(l=r[s][t],r[s][t]=null)}l&&e.push({from:l,to:t,options:n})}))}getUnmatchedAutoAnimateElements(e){return[].slice.call(e.children).reduce(((e,t)=>{const i=t.querySelector("[data-auto-animate-target]");return t.hasAttribute("data-auto-animate-target")||i||e.push(t),t.querySelector("[data-auto-animate-target]")&&(e=e.concat(this.getUnmatchedAutoAnimateElements(t))),e}),[])}}class C{constructor(e){this.Reveal=e,this.active=!1,this.activatedCallbacks=[],this.onScroll=this.onScroll.bind(this)}activate(){if(this.active)return;const e=this.Reveal.getState();this.active=!0,this.slideHTMLBeforeActivation=this.Reveal.getSlidesElement().innerHTML;const i=t(this.Reveal.getRevealElement(),f),s=t(this.Reveal.getRevealElement(),".backgrounds>.slide-background");let a;this.viewportElement.classList.add("loading-scroll-mode","reveal-scroll");const n=window.getComputedStyle(this.viewportElement);n&&n.background&&(a=n.background);const r=[],o=i[0].parentNode;let l;const d=(e,t,i,n)=>{let o;if(l&&this.Reveal.shouldAutoAnimateBetween(l,e))o=document.createElement("div"),o.className="scroll-page-content scroll-auto-animate-page",o.style.display="none",l.closest(".scroll-page-content").parentNode.appendChild(o);else{const e=document.createElement("div");if(e.className="scroll-page",r.push(e),n&&s.length>t){const i=s[t],n=window.getComputedStyle(i);n&&n.background?e.style.background=n.background:a&&(e.style.background=a)}else a&&(e.style.background=a);const i=document.createElement("div");i.className="scroll-page-sticky",e.appendChild(i),o=document.createElement("div"),o.className="scroll-page-content",i.appendChild(o)}o.appendChild(e),e.classList.remove("past","future"),e.setAttribute("data-index-h",t),e.setAttribute("data-index-v",i),e.slideBackgroundElement&&(e.slideBackgroundElement.remove("past","future"),o.insertBefore(e.slideBackgroundElement,e)),l=e};i.forEach(((e,t)=>{this.Reveal.isVerticalStack(e)?e.querySelectorAll("section").forEach(((e,i)=>{d(e,t,i,!0)})):d(e,t,0)}),this),this.createProgressBar(),t(this.Reveal.getRevealElement(),".stack").forEach((e=>e.remove())),r.forEach((e=>o.appendChild(e))),this.Reveal.slideContent.layout(this.Reveal.getSlidesElement()),this.Reveal.layout(),this.Reveal.setState(e),this.activatedCallbacks.forEach((e=>e())),this.activatedCallbacks=[],this.restoreScrollPosition(),this.viewportElement.classList.remove("loading-scroll-mode"),this.viewportElement.addEventListener("scroll",this.onScroll,{passive:!0})}deactivate(){if(!this.active)return;const e=this.Reveal.getState();this.active=!1,this.viewportElement.removeEventListener("scroll",this.onScroll),this.viewportElement.classList.remove("reveal-scroll"),this.removeProgressBar(),this.Reveal.getSlidesElement().innerHTML=this.slideHTMLBeforeActivation,this.Reveal.sync(),this.Reveal.setState(e),this.slideHTMLBeforeActivation=null}toggle(e){"boolean"==typeof e?e?this.activate():this.deactivate():this.isActive()?this.deactivate():this.activate()}isActive(){return this.active}createProgressBar(){this.progressBar=document.createElement("div"),this.progressBar.className="scrollbar",this.progressBarInner=document.createElement("div"),this.progressBarInner.className="scrollbar-inner",this.progressBar.appendChild(this.progressBarInner),this.progressBarPlayhead=document.createElement("div"),this.progressBarPlayhead.className="scrollbar-playhead",this.progressBarInner.appendChild(this.progressBarPlayhead),this.viewportElement.insertBefore(this.progressBar,this.viewportElement.firstChild);const e=e=>{let t=(e.clientY-this.progressBarInner.getBoundingClientRect().top)/this.progressBarHeight;t=Math.max(Math.min(t,1),0),this.viewportElement.scrollTop=t*(this.viewportElement.scrollHeight-this.viewportElement.offsetHeight)},t=i=>{this.draggingProgressBar=!1,this.showProgressBar(),document.removeEventListener("mousemove",e),document.removeEventListener("mouseup",t)};this.progressBarInner.addEventListener("mousedown",(i=>{i.preventDefault(),this.draggingProgressBar=!0,document.addEventListener("mousemove",e),document.addEventListener("mouseup",t),e(i)}))}removeProgressBar(){this.progressBar&&(this.progressBar.remove(),this.progressBar=null)}layout(){this.isActive()&&(this.syncPages(),this.syncScrollPosition())}syncPages(){const e=this.Reveal.getConfig(),t=this.Reveal.getComputedSlideSize(window.innerWidth,window.innerHeight),i=this.Reveal.getScale(),s="compact"===e.scrollLayout,a=this.viewportElement.offsetHeight,n=t.height*i,r=s?n:a;this.scrollTriggerHeight=s?n:a,this.viewportElement.style.setProperty("--page-height",r+"px"),this.viewportElement.style.scrollSnapType="string"==typeof e.scrollSnap?`y ${e.scrollSnap}`:"",this.slideTriggers=[];const o=Array.from(this.Reveal.getRevealElement().querySelectorAll(".scroll-page"));this.pages=o.map((i=>{const n=this.createPage({pageElement:i,slideElement:i.querySelector("section"),stickyElement:i.querySelector(".scroll-page-sticky"),contentElement:i.querySelector(".scroll-page-content"),backgroundElement:i.querySelector(".slide-background"),autoAnimateElements:i.querySelectorAll(".scroll-auto-animate-page"),autoAnimatePages:[]});n.pageElement.style.setProperty("--slide-height",!0===e.center?"auto":t.height+"px"),this.slideTriggers.push({page:n,activate:()=>this.activatePage(n),deactivate:()=>this.deactivatePage(n)}),this.createFragmentTriggersForPage(n),n.autoAnimateElements.length>0&&this.createAutoAnimateTriggersForPage(n);let o=Math.max(n.scrollTriggers.length-1,0);o+=n.autoAnimatePages.reduce(((e,t)=>e+Math.max(t.scrollTriggers.length-1,0)),n.autoAnimatePages.length),n.pageElement.querySelectorAll(".scroll-snap-point").forEach((e=>e.remove()));for(let e=0;e<o+1;e++){const t=document.createElement("div");t.className="scroll-snap-point",t.style.height=this.scrollTriggerHeight+"px",t.style.scrollSnapAlign=s?"center":"start",n.pageElement.appendChild(t),0===e&&(t.style.marginTop=-this.scrollTriggerHeight+"px")}return s&&n.scrollTriggers.length>0?(n.pageHeight=a,n.pageElement.style.setProperty("--page-height",a+"px")):(n.pageHeight=r,n.pageElement.style.removeProperty("--page-height")),n.scrollPadding=this.scrollTriggerHeight*o,n.totalHeight=n.pageHeight+n.scrollPadding,n.pageElement.style.setProperty("--page-scroll-padding",n.scrollPadding+"px"),o>0?(n.stickyElement.style.position="sticky",n.stickyElement.style.top=Math.max((a-n.pageHeight)/2,0)+"px"):(n.stickyElement.style.position="relative",n.pageElement.style.scrollSnapAlign=n.pageHeight<a?"center":"start"),n})),this.setTriggerRanges(),this.viewportElement.setAttribute("data-scrollbar",e.scrollProgress),e.scrollProgress&&this.totalScrollTriggerCount>1?(this.progressBar||this.createProgressBar(),this.syncProgressBar()):this.removeProgressBar()}setTriggerRanges(){this.totalScrollTriggerCount=this.slideTriggers.reduce(((e,t)=>e+Math.max(t.page.scrollTriggers.length,1)),0);let e=0;this.slideTriggers.forEach(((t,i)=>{t.range=[e,e+Math.max(t.page.scrollTriggers.length,1)/this.totalScrollTriggerCount];const s=(t.range[1]-t.range[0])/t.page.scrollTriggers.length;t.page.scrollTriggers.forEach(((t,i)=>{t.range=[e+i*s,e+(i+1)*s]})),e=t.range[1]}))}createFragmentTriggersForPage(e,t){t=t||e.slideElement;const i=this.Reveal.fragments.sort(t.querySelectorAll(".fragment"),!0);return i.length&&(e.fragments=this.Reveal.fragments.sort(t.querySelectorAll(".fragment:not(.disabled)")),e.scrollTriggers.push({activate:()=>{this.Reveal.fragments.update(-1,e.fragments,t)}}),i.forEach(((i,s)=>{e.scrollTriggers.push({activate:()=>{this.Reveal.fragments.update(s,e.fragments,t)}})}))),e.scrollTriggers.length}createAutoAnimateTriggersForPage(e){e.autoAnimateElements.length>0&&this.slideTriggers.push(...Array.from(e.autoAnimateElements).map(((t,i)=>{let s=this.createPage({slideElement:t.querySelector("section"),contentElement:t,backgroundElement:t.querySelector(".slide-background")});return this.createFragmentTriggersForPage(s,s.slideElement),e.autoAnimatePages.push(s),{page:s,activate:()=>this.activatePage(s),deactivate:()=>this.deactivatePage(s)}})))}createPage(e){return e.scrollTriggers=[],e.indexh=parseInt(e.slideElement.getAttribute("data-index-h"),10),e.indexv=parseInt(e.slideElement.getAttribute("data-index-v"),10),e}syncProgressBar(){this.progressBarInner.querySelectorAll(".scrollbar-slide").forEach((e=>e.remove()));const e=this.viewportElement.scrollHeight,t=this.viewportElement.offsetHeight,i=t/e;this.progressBarHeight=this.progressBarInner.offsetHeight,this.playheadHeight=Math.max(i*this.progressBarHeight,8),this.progressBarScrollableHeight=this.progressBarHeight-this.playheadHeight;const s=t/e*this.progressBarHeight,a=Math.min(s/8,4);this.progressBarPlayhead.style.height=this.playheadHeight-a+"px",s>6?this.slideTriggers.forEach((e=>{const{page:t}=e;t.progressBarSlide=document.createElement("div"),t.progressBarSlide.className="scrollbar-slide",t.progressBarSlide.style.top=e.range[0]*this.progressBarHeight+"px",t.progressBarSlide.style.height=(e.range[1]-e.range[0])*this.progressBarHeight-a+"px",t.progressBarSlide.classList.toggle("has-triggers",t.scrollTriggers.length>0),this.progressBarInner.appendChild(t.progressBarSlide),t.scrollTriggerElements=t.scrollTriggers.map(((i,s)=>{const n=document.createElement("div");return n.className="scrollbar-trigger",n.style.top=(i.range[0]-e.range[0])*this.progressBarHeight+"px",n.style.height=(i.range[1]-i.range[0])*this.progressBarHeight-a+"px",t.progressBarSlide.appendChild(n),0===s&&(n.style.display="none"),n}))})):this.pages.forEach((e=>e.progressBarSlide=null))}syncScrollPosition(){const e=this.viewportElement.offsetHeight,t=e/this.viewportElement.scrollHeight,i=this.viewportElement.scrollTop,s=this.viewportElement.scrollHeight-e,a=Math.max(Math.min(i/s,1),0),n=Math.max(Math.min((i+e/2)/this.viewportElement.scrollHeight,1),0);let r;this.slideTriggers.forEach((e=>{const{page:i}=e;a>=e.range[0]-2*t&&a<=e.range[1]+2*t&&!i.loaded?(i.loaded=!0,this.Reveal.slideContent.load(i.slideElement)):i.loaded&&(i.loaded=!1,this.Reveal.slideContent.unload(i.slideElement)),a>=e.range[0]&&a<=e.range[1]?(this.activateTrigger(e),r=e.page):e.active&&this.deactivateTrigger(e)})),r&&r.scrollTriggers.forEach((e=>{n>=e.range[0]&&n<=e.range[1]?this.activateTrigger(e):e.active&&this.deactivateTrigger(e)})),this.setProgressBarValue(i/(this.viewportElement.scrollHeight-e))}setProgressBarValue(e){this.progressBar&&(this.progressBarPlayhead.style.transform=`translateY(${e*this.progressBarScrollableHeight}px)`,this.getAllPages().filter((e=>e.progressBarSlide)).forEach((e=>{e.progressBarSlide.classList.toggle("active",!0===e.active),e.scrollTriggers.forEach(((t,i)=>{e.scrollTriggerElements[i].classList.toggle("active",!0===e.active&&!0===t.active)}))})),this.showProgressBar())}showProgressBar(){this.progressBar.classList.add("visible"),clearTimeout(this.hideProgressBarTimeout),"auto"!==this.Reveal.getConfig().scrollProgress||this.draggingProgressBar||(this.hideProgressBarTimeout=setTimeout((()=>{this.progressBar&&this.progressBar.classList.remove("visible")}),500))}prev(){this.viewportElement.scrollTop-=this.scrollTriggerHeight}next(){this.viewportElement.scrollTop+=this.scrollTriggerHeight}scrollToSlide(e){if(this.active){const t=this.getScrollTriggerBySlide(e);t&&(this.viewportElement.scrollTop=t.range[0]*(this.viewportElement.scrollHeight-this.viewportElement.offsetHeight))}else this.activatedCallbacks.push((()=>this.scrollToSlide(e)))}storeScrollPosition(){clearTimeout(this.storeScrollPositionTimeout),this.storeScrollPositionTimeout=setTimeout((()=>{sessionStorage.setItem("reveal-scroll-top",this.viewportElement.scrollTop),sessionStorage.setItem("reveal-scroll-origin",location.origin+location.pathname),this.storeScrollPositionTimeout=null}),50)}restoreScrollPosition(){const 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i=this.getAllPages().find((i=>i.indexh===e&&i.indexv===t));return i?i.slideElement:null}getScrollTriggerBySlide(e){return this.slideTriggers.find((t=>t.page.slideElement===e))}getAllPages(){return this.pages.flatMap((e=>[e,...e.autoAnimatePages||[]]))}onScroll(){this.syncScrollPosition(),this.storeScrollPosition()}get viewportElement(){return this.Reveal.getViewportElement()}}class x{constructor(e){this.Reveal=e}async activate(){const e=this.Reveal.getConfig(),i=t(this.Reveal.getRevealElement(),m),s=e.slideNumber&&/all|print/i.test(e.showSlideNumber),a=this.Reveal.getComputedSlideSize(window.innerWidth,window.innerHeight),n=Math.floor(a.width*(1+e.margin)),r=Math.floor(a.height*(1+e.margin)),o=a.width,d=a.height;await new Promise(requestAnimationFrame),l("@page{size:"+n+"px "+r+"px; margin: 0px;}"),l(".reveal section>img, .reveal section>video, .reveal section>iframe{max-width: "+o+"px; 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f=document.createElement("div");if(g.push(f),f.className="pdf-page",f.style.height=(r+e.pdfPageHeightOffset)*m+"px",h&&(f.style.background=h),f.appendChild(i),i.style.left=l+"px",i.style.top=c+"px",i.style.width=o+"px",this.Reveal.slideContent.layout(i),i.slideBackgroundElement&&f.insertBefore(i.slideBackgroundElement,i),e.showNotes){const t=this.Reveal.getSlideNotes(i);if(t){const i=8,s="string"==typeof e.showNotes?e.showNotes:"inline",a=document.createElement("div");a.classList.add("speaker-notes"),a.classList.add("speaker-notes-pdf"),a.setAttribute("data-layout",s),a.innerHTML=t,"separate-page"===s?g.push(a):(a.style.left=i+"px",a.style.bottom=i+"px",a.style.width=n-2*i+"px",f.appendChild(a))}}if(s){const e=document.createElement("div");e.classList.add("slide-number"),e.classList.add("slide-number-pdf"),e.innerHTML=v++,f.appendChild(e)}if(e.pdfSeparateFragments){const e=this.Reveal.fragments.sort(f.querySelectorAll(".fragment"),!0);let t;e.forEach((function(e,i){t&&t.forEach((function(e){e.classList.remove("current-fragment")})),e.forEach((function(e){e.classList.add("visible","current-fragment")}),this);const a=f.cloneNode(!0);if(s){const e=i+1;a.querySelector(".slide-number-pdf").innerHTML+="."+e}g.push(a),t=e}),this),e.forEach((function(e){e.forEach((function(e){e.classList.remove("visible","current-fragment")}))}))}else t(f,".fragment:not(.fade-out)").forEach((function(e){e.classList.add("visible")}))}}),this),await new Promise(requestAnimationFrame),g.forEach((e=>p.appendChild(e))),this.Reveal.slideContent.layout(this.Reveal.getSlidesElement()),this.Reveal.dispatchEvent({type:"pdf-ready"}),c.classList.remove("loading-scroll-mode")}isActive(){return"print"===this.Reveal.getConfig().view}}class 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this.sort(e.querySelectorAll(".fragment"))}goto(e,t=0){let i=this.Reveal.getCurrentSlide();if(i&&this.Reveal.getConfig().fragments){let s=this.sort(i.querySelectorAll(".fragment:not(.disabled)"));if(s.length){if("number"!=typeof e){let t=this.sort(i.querySelectorAll(".fragment:not(.disabled).visible")).pop();e=t?parseInt(t.getAttribute("data-fragment-index")||0,10):-1}e+=t;let a=this.update(e,s);return this.Reveal.controls.update(),this.Reveal.progress.update(),this.Reveal.getConfig().fragmentInURL&&this.Reveal.location.writeURL(),!(!a.shown.length&&!a.hidden.length)}}return!1}next(){return this.goto(null,1)}prev(){return this.goto(null,-1)}}class T{constructor(e){this.Reveal=e,this.active=!1,this.onSlideClicked=this.onSlideClicked.bind(this)}activate(){if(this.Reveal.getConfig().overview&&!this.Reveal.isScrollView()&&!this.isActive()){this.active=!0,this.Reveal.getRevealElement().classList.add("overview"),this.Reveal.cancelAutoSlide(),this.Reveal.getSlidesElement().appendChild(this.Reveal.getBackgroundsElement()),t(this.Reveal.getRevealElement(),m).forEach((e=>{e.classList.contains("stack")||e.addEventListener("click",this.onSlideClicked,!0)}));const e=70,i=this.Reveal.getComputedSlideSize();this.overviewSlideWidth=i.width+e,this.overviewSlideHeight=i.height+e,this.Reveal.getConfig().rtl&&(this.overviewSlideWidth=-this.overviewSlideWidth),this.Reveal.updateSlidesVisibility(),this.layout(),this.update(),this.Reveal.layout();const 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a=this.Reveal.getIndices(e);if(this.Reveal.getConfig().fragmentInURL||(a.f=void 0),"string"==typeof s&&s.length)t="/"+s,a.f>=0&&(t+="/"+a.f);else{let e=this.Reveal.getConfig().hashOneBasedIndex?1:0;(a.h>0||a.v>0||a.f>=0)&&(t+=a.h+e),(a.v>0||a.f>=0)&&(t+="/"+(a.v+e)),a.f>=0&&(t+="/"+a.f)}return t}onWindowHashChange(e){this.readURL()}}class I{constructor(e){this.Reveal=e,this.onNavigateLeftClicked=this.onNavigateLeftClicked.bind(this),this.onNavigateRightClicked=this.onNavigateRightClicked.bind(this),this.onNavigateUpClicked=this.onNavigateUpClicked.bind(this),this.onNavigateDownClicked=this.onNavigateDownClicked.bind(this),this.onNavigatePrevClicked=this.onNavigatePrevClicked.bind(this),this.onNavigateNextClicked=this.onNavigateNextClicked.bind(this),this.onEnterFullscreen=this.onEnterFullscreen.bind(this)}render(){const 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i < nodes.length; i++ ) {\n\t\tlet testNode = nodes[i];\n\t\tif( testNode.parentNode === container ) {\n\t\t\treturn testNode;\n\t\t}\n\t}\n\n\t// If no node was found, create it now\n\tlet node = document.createElement( tagname );\n\tnode.className = classname;\n\tnode.innerHTML = innerHTML;\n\tcontainer.appendChild( node );\n\n\treturn node;\n\n}\n\n/**\n * Injects the given CSS styles into the DOM.\n *\n * @param {string} value\n */\nexport const createStyleSheet = ( value ) => {\n\n\tlet tag = document.createElement( 'style' );\n\ttag.type = 'text/css';\n\n\tif( value && value.length > 0 ) {\n\t\tif( tag.styleSheet ) {\n\t\t\ttag.styleSheet.cssText = value;\n\t\t}\n\t\telse {\n\t\t\ttag.appendChild( document.createTextNode( value ) );\n\t\t}\n\t}\n\n\tdocument.head.appendChild( tag );\n\n\treturn tag;\n\n}\n\n/**\n * Returns a key:value hash of all query params.\n */\nexport const getQueryHash = () => {\n\n\tlet query = {};\n\n\tlocation.search.replace( /[A-Z0-9]+?=([\\w\\.%-]*)/gi, a => {\n\t\tquery[ a.split( '=' ).shift() ] = a.split( '=' ).pop();\n\t} );\n\n\t// Basic deserialization\n\tfor( let i in query ) {\n\t\tlet value = query[ i ];\n\n\t\tquery[ i ] = deserialize( unescape( value ) );\n\t}\n\n\t// Do not accept new dependencies via query config to avoid\n\t// the potential of malicious script injection\n\tif( typeof query['dependencies'] !== 'undefined' ) delete query['dependencies'];\n\n\treturn query;\n\n}\n\n/**\n * Returns the remaining height within the parent of the\n * target element.\n *\n * remaining height = [ configured parent height ] - [ current parent height ]\n *\n * @param {HTMLElement} element\n * @param {number} [height]\n */\nexport const getRemainingHeight = ( element, height = 0 ) => {\n\n\tif( element ) {\n\t\tlet newHeight, oldHeight = element.style.height;\n\n\t\t// Change the .stretch element height to 0 in order find the height of all\n\t\t// the other elements\n\t\telement.style.height = '0px';\n\n\t\t// In Overview mode, the parent (.slide) height is set of 700px.\n\t\t// Restore it temporarily to its natural height.\n\t\telement.parentNode.style.height = 'auto';\n\n\t\tnewHeight = height - element.parentNode.offsetHeight;\n\n\t\t// Restore the old height, just in case\n\t\telement.style.height = oldHeight + 'px';\n\n\t\t// Clear the parent (.slide) height. .removeProperty works in IE9+\n\t\telement.parentNode.style.removeProperty('height');\n\n\t\treturn newHeight;\n\t}\n\n\treturn height;\n\n}\n\nconst fileExtensionToMimeMap = {\n\t'mp4': 'video/mp4',\n\t'm4a': 'video/mp4',\n\t'ogv': 'video/ogg',\n\t'mpeg': 'video/mpeg',\n\t'webm': 'video/webm'\n}\n\n/**\n * Guess the MIME type for common file formats.\n */\nexport const getMimeTypeFromFile = ( filename='' ) => {\n\treturn fileExtensionToMimeMap[filename.split('.').pop()]\n}\n\n/**\n * Encodes a string for RFC3986-compliant URL format.\n * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURI#encoding_for_rfc3986\n *\n * @param {string} url\n */\nexport const encodeRFC3986URI = ( url='' ) => {\n\treturn encodeURI(url)\n\t .replace(/%5B/g, \"[\")\n\t .replace(/%5D/g, \"]\")\n\t .replace(\n\t\t/[!'()*]/g,\n\t\t(c) => `%${c.charCodeAt(0).toString(16).toUpperCase()}`\n\t );\n}","const UA = navigator.userAgent;\n\nexport const isMobile = /(iphone|ipod|ipad|android)/gi.test( UA ) ||\n\t\t\t\t\t\t( navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1 ); // iPadOS\n\nexport const isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );\n\nexport const isAndroid = /android/gi.test( UA );","/**\n * fitty v2.3.7 - Snugly resizes text to fit its parent container\n * Copyright (c) 2023 Rik Schennink <rik@pqina.nl> (https://pqina.nl/)\n */\n\nvar e=function(e){if(e){var t=function(e){return[].slice.call(e)},n=0,i=1,r=2,o=3,a=[],l=null,u=\"requestAnimationFrame\"in e?function(){e.cancelAnimationFrame(l),l=e.requestAnimationFrame((function(){return s(a.filter((function(e){return e.dirty&&e.active})))}))}:function(){},c=function(e){return function(){a.forEach((function(t){return t.dirty=e})),u()}},s=function(e){e.filter((function(e){return!e.styleComputed})).forEach((function(e){e.styleComputed=m(e)})),e.filter(y).forEach(v);var t=e.filter(p);t.forEach(d),t.forEach((function(e){v(e),f(e)})),t.forEach(S)},f=function(e){return e.dirty=n},d=function(e){e.availableWidth=e.element.parentNode.clientWidth,e.currentWidth=e.element.scrollWidth,e.previousFontSize=e.currentFontSize,e.currentFontSize=Math.min(Math.max(e.minSize,e.availableWidth/e.currentWidth*e.previousFontSize),e.maxSize),e.whiteSpace=e.multiLine&&e.currentFontSize===e.minSize?\"normal\":\"nowrap\"},p=function(e){return e.dirty!==r||e.dirty===r&&e.element.parentNode.clientWidth!==e.availableWidth},m=function(t){var n=e.getComputedStyle(t.element,null);return t.currentFontSize=parseFloat(n.getPropertyValue(\"font-size\")),t.display=n.getPropertyValue(\"display\"),t.whiteSpace=n.getPropertyValue(\"white-space\"),!0},y=function(e){var t=!1;return!e.preStyleTestCompleted&&(/inline-/.test(e.display)||(t=!0,e.display=\"inline-block\"),\"nowrap\"!==e.whiteSpace&&(t=!0,e.whiteSpace=\"nowrap\"),e.preStyleTestCompleted=!0,t)},v=function(e){e.element.style.whiteSpace=e.whiteSpace,e.element.style.display=e.display,e.element.style.fontSize=e.currentFontSize+\"px\"},S=function(e){e.element.dispatchEvent(new CustomEvent(\"fit\",{detail:{oldValue:e.previousFontSize,newValue:e.currentFontSize,scaleFactor:e.currentFontSize/e.previousFontSize}}))},h=function(e,t){return function(){e.dirty=t,e.active&&u()}},w=function(e){return function(){a=a.filter((function(t){return t.element!==e.element})),e.observeMutations&&e.observer.disconnect(),e.element.style.whiteSpace=e.originalStyle.whiteSpace,e.element.style.display=e.originalStyle.display,e.element.style.fontSize=e.originalStyle.fontSize}},b=function(e){return function(){e.active||(e.active=!0,u())}},z=function(e){return function(){return e.active=!1}},F=function(e){e.observeMutations&&(e.observer=new MutationObserver(h(e,i)),e.observer.observe(e.element,e.observeMutations))},g={minSize:16,maxSize:512,multiLine:!0,observeMutations:\"MutationObserver\"in e&&{subtree:!0,childList:!0,characterData:!0}},W=null,E=function(){e.clearTimeout(W),W=e.setTimeout(c(r),x.observeWindowDelay)},M=[\"resize\",\"orientationchange\"];return Object.defineProperty(x,\"observeWindow\",{set:function(t){var n=\"\".concat(t?\"add\":\"remove\",\"EventListener\");M.forEach((function(t){e[n](t,E)}))}}),x.observeWindow=!0,x.observeWindowDelay=100,x.fitAll=c(o),x}function C(e,t){var n=Object.assign({},g,t),i=e.map((function(e){var t=Object.assign({},n,{element:e,active:!0});return function(e){e.originalStyle={whiteSpace:e.element.style.whiteSpace,display:e.element.style.display,fontSize:e.element.style.fontSize},F(e),e.newbie=!0,e.dirty=!0,a.push(e)}(t),{element:e,fit:h(t,o),unfreeze:b(t),freeze:z(t),unsubscribe:w(t)}}));return u(),i}function x(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};return\"string\"==typeof e?C(t(document.querySelectorAll(e)),n):C([e],n)[0]}}(\"undefined\"==typeof window?null:window);export default e;\n","import { extend, queryAll, closest, getMimeTypeFromFile, encodeRFC3986URI } from '../utils/util.js'\nimport { isMobile } from '../utils/device.js'\n\nimport fitty from 'fitty';\n\n/**\n * Handles loading, unloading and playback of slide\n * content such as images, videos and iframes.\n */\nexport default class SlideContent {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.startEmbeddedIframe = this.startEmbeddedIframe.bind( this );\n\n\t}\n\n\t/**\n\t * Should the given element be preloaded?\n\t * Decides based on local element attributes and global config.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tshouldPreload( element ) {\n\n\t\tif( this.Reveal.isScrollView() ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Prefer an explicit global preload setting\n\t\tlet preload = this.Reveal.getConfig().preloadIframes;\n\n\t\t// If no global setting is available, fall back on the element's\n\t\t// own preload setting\n\t\tif( typeof preload !== 'boolean' ) {\n\t\t\tpreload = element.hasAttribute( 'data-preload' );\n\t\t}\n\n\t\treturn preload;\n\t}\n\n\t/**\n\t * Called when the given slide is within the configured view\n\t * distance. Shows the slide element and loads any content\n\t * that is set to load lazily (data-src).\n\t *\n\t * @param {HTMLElement} slide Slide to show\n\t */\n\tload( slide, options = {} ) {\n\n\t\t// Show the slide element\n\t\tslide.style.display = this.Reveal.getConfig().display;\n\n\t\t// Media elements with data-src attributes\n\t\tqueryAll( slide, 'img[data-src], video[data-src], audio[data-src], iframe[data-src]' ).forEach( element => {\n\t\t\tif( element.tagName !== 'IFRAME' || this.shouldPreload( element ) ) {\n\t\t\t\telement.setAttribute( 'src', element.getAttribute( 'data-src' ) );\n\t\t\t\telement.setAttribute( 'data-lazy-loaded', '' );\n\t\t\t\telement.removeAttribute( 'data-src' );\n\t\t\t}\n\t\t} );\n\n\t\t// Media elements with <source> children\n\t\tqueryAll( slide, 'video, audio' ).forEach( media => {\n\t\t\tlet sources = 0;\n\n\t\t\tqueryAll( media, 'source[data-src]' ).forEach( source => {\n\t\t\t\tsource.setAttribute( 'src', source.getAttribute( 'data-src' ) );\n\t\t\t\tsource.removeAttribute( 'data-src' );\n\t\t\t\tsource.setAttribute( 'data-lazy-loaded', '' );\n\t\t\t\tsources += 1;\n\t\t\t} );\n\n\t\t\t// Enable inline video playback in mobile Safari\n\t\t\tif( isMobile && media.tagName === 'VIDEO' ) {\n\t\t\t\tmedia.setAttribute( 'playsinline', '' );\n\t\t\t}\n\n\t\t\t// If we rewrote sources for this video/audio element, we need\n\t\t\t// to manually tell it to load from its new origin\n\t\t\tif( sources > 0 ) {\n\t\t\t\tmedia.load();\n\t\t\t}\n\t\t} );\n\n\n\t\t// Show the corresponding background element\n\t\tlet background = slide.slideBackgroundElement;\n\t\tif( background ) {\n\t\t\tbackground.style.display = 'block';\n\n\t\t\tlet backgroundContent = slide.slideBackgroundContentElement;\n\t\t\tlet backgroundIframe = slide.getAttribute( 'data-background-iframe' );\n\n\t\t\t// If the background contains media, load it\n\t\t\tif( background.hasAttribute( 'data-loaded' ) === false ) {\n\t\t\t\tbackground.setAttribute( 'data-loaded', 'true' );\n\n\t\t\t\tlet backgroundImage = slide.getAttribute( 'data-background-image' ),\n\t\t\t\t\tbackgroundVideo = slide.getAttribute( 'data-background-video' ),\n\t\t\t\t\tbackgroundVideoLoop = slide.hasAttribute( 'data-background-video-loop' ),\n\t\t\t\t\tbackgroundVideoMuted = slide.hasAttribute( 'data-background-video-muted' );\n\n\t\t\t\t// Images\n\t\t\t\tif( backgroundImage ) {\n\t\t\t\t\t// base64\n\t\t\t\t\tif( /^data:/.test( backgroundImage.trim() ) ) {\n\t\t\t\t\t\tbackgroundContent.style.backgroundImage = `url(${backgroundImage.trim()})`;\n\t\t\t\t\t}\n\t\t\t\t\t// URL(s)\n\t\t\t\t\telse {\n\t\t\t\t\t\tbackgroundContent.style.backgroundImage = backgroundImage.split( ',' ).map( background => {\n\t\t\t\t\t\t\t// Decode URL(s) that are already encoded first\n\t\t\t\t\t\t\tlet decoded = decodeURI(background.trim());\n\t\t\t\t\t\t\treturn `url(${encodeRFC3986URI(decoded)})`;\n\t\t\t\t\t\t}).join( ',' );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t// Videos\n\t\t\t\telse if ( backgroundVideo && !this.Reveal.isSpeakerNotes() ) {\n\t\t\t\t\tlet video = document.createElement( 'video' );\n\n\t\t\t\t\tif( backgroundVideoLoop ) {\n\t\t\t\t\t\tvideo.setAttribute( 'loop', '' );\n\t\t\t\t\t}\n\n\t\t\t\t\tif( backgroundVideoMuted ) {\n\t\t\t\t\t\tvideo.muted = true;\n\t\t\t\t\t}\n\n\t\t\t\t\t// Enable inline playback in mobile Safari\n\t\t\t\t\t//\n\t\t\t\t\t// Mute is required for video to play when using\n\t\t\t\t\t// swipe gestures to navigate since they don't\n\t\t\t\t\t// count as direct user actions :'(\n\t\t\t\t\tif( isMobile ) {\n\t\t\t\t\t\tvideo.muted = true;\n\t\t\t\t\t\tvideo.setAttribute( 'playsinline', '' );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Support comma separated lists of video sources\n\t\t\t\t\tbackgroundVideo.split( ',' ).forEach( source => {\n\t\t\t\t\t\tconst sourceElement = document.createElement( 'source' );\n\t\t\t\t\t\tsourceElement.setAttribute( 'src', source );\n\n\t\t\t\t\t\tlet type = getMimeTypeFromFile( source );\n\t\t\t\t\t\tif( type ) {\n\t\t\t\t\t\t\tsourceElement.setAttribute( 'type', type );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tvideo.appendChild( sourceElement );\n\t\t\t\t\t} );\n\n\t\t\t\t\tbackgroundContent.appendChild( video );\n\t\t\t\t}\n\t\t\t\t// Iframes\n\t\t\t\telse if( backgroundIframe && options.excludeIframes !== true ) {\n\t\t\t\t\tlet iframe = document.createElement( 'iframe' );\n\t\t\t\t\tiframe.setAttribute( 'allowfullscreen', '' );\n\t\t\t\t\tiframe.setAttribute( 'mozallowfullscreen', '' );\n\t\t\t\t\tiframe.setAttribute( 'webkitallowfullscreen', '' );\n\t\t\t\t\tiframe.setAttribute( 'allow', 'autoplay' );\n\n\t\t\t\t\tiframe.setAttribute( 'data-src', backgroundIframe );\n\n\t\t\t\t\tiframe.style.width = '100%';\n\t\t\t\t\tiframe.style.height = '100%';\n\t\t\t\t\tiframe.style.maxHeight = '100%';\n\t\t\t\t\tiframe.style.maxWidth = '100%';\n\n\t\t\t\t\tbackgroundContent.appendChild( iframe );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Start loading preloadable iframes\n\t\t\tlet backgroundIframeElement = backgroundContent.querySelector( 'iframe[data-src]' );\n\t\t\tif( backgroundIframeElement ) {\n\n\t\t\t\t// Check if this iframe is eligible to be preloaded\n\t\t\t\tif( this.shouldPreload( background ) && !/autoplay=(1|true|yes)/gi.test( backgroundIframe ) ) {\n\t\t\t\t\tif( backgroundIframeElement.getAttribute( 'src' ) !== backgroundIframe ) {\n\t\t\t\t\t\tbackgroundIframeElement.setAttribute( 'src', backgroundIframe );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis.layout( slide );\n\n\t}\n\n\t/**\n\t * Applies JS-dependent layout helpers for the scope.\n\t */\n\tlayout( scopeElement ) {\n\n\t\t// Autosize text with the r-fit-text class based on the\n\t\t// size of its container. This needs to happen after the\n\t\t// slide is visible in order to measure the text.\n\t\tArray.from( scopeElement.querySelectorAll( '.r-fit-text' ) ).forEach( element => {\n\t\t\tfitty( element, {\n\t\t\t\tminSize: 24,\n\t\t\t\tmaxSize: this.Reveal.getConfig().height * 0.8,\n\t\t\t\tobserveMutations: false,\n\t\t\t\tobserveWindow: false\n\t\t\t} );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Unloads and hides the given slide. This is called when the\n\t * slide is moved outside of the configured view distance.\n\t *\n\t * @param {HTMLElement} slide\n\t */\n\tunload( slide ) {\n\n\t\t// Hide the slide element\n\t\tslide.style.display = 'none';\n\n\t\t// Hide the corresponding background element\n\t\tlet background = this.Reveal.getSlideBackground( slide );\n\t\tif( background ) {\n\t\t\tbackground.style.display = 'none';\n\n\t\t\t// Unload any background iframes\n\t\t\tqueryAll( background, 'iframe[src]' ).forEach( element => {\n\t\t\t\telement.removeAttribute( 'src' );\n\t\t\t} );\n\t\t}\n\n\t\t// Reset lazy-loaded media elements with src attributes\n\t\tqueryAll( slide, 'video[data-lazy-loaded][src], audio[data-lazy-loaded][src], iframe[data-lazy-loaded][src]' ).forEach( element => {\n\t\t\telement.setAttribute( 'data-src', element.getAttribute( 'src' ) );\n\t\t\telement.removeAttribute( 'src' );\n\t\t} );\n\n\t\t// Reset lazy-loaded media elements with <source> children\n\t\tqueryAll( slide, 'video[data-lazy-loaded] source[src], audio source[src]' ).forEach( source => {\n\t\t\tsource.setAttribute( 'data-src', source.getAttribute( 'src' ) );\n\t\t\tsource.removeAttribute( 'src' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Enforces origin-specific format rules for embedded media.\n\t */\n\tformatEmbeddedContent() {\n\n\t\tlet _appendParamToIframeSource = ( sourceAttribute, sourceURL, param ) => {\n\t\t\tqueryAll( this.Reveal.getSlidesElement(), 'iframe['+ sourceAttribute +'*=\"'+ sourceURL +'\"]' ).forEach( el => {\n\t\t\t\tlet src = el.getAttribute( sourceAttribute );\n\t\t\t\tif( src && src.indexOf( param ) === -1 ) {\n\t\t\t\t\tel.setAttribute( sourceAttribute, src + ( !/\\?/.test( src ) ? '?' : '&' ) + param );\n\t\t\t\t}\n\t\t\t});\n\t\t};\n\n\t\t// YouTube frames must include \"?enablejsapi=1\"\n\t\t_appendParamToIframeSource( 'src', 'youtube.com/embed/', 'enablejsapi=1' );\n\t\t_appendParamToIframeSource( 'data-src', 'youtube.com/embed/', 'enablejsapi=1' );\n\n\t\t// Vimeo frames must include \"?api=1\"\n\t\t_appendParamToIframeSource( 'src', 'player.vimeo.com/', 'api=1' );\n\t\t_appendParamToIframeSource( 'data-src', 'player.vimeo.com/', 'api=1' );\n\n\t}\n\n\t/**\n\t * Start playback of any embedded content inside of\n\t * the given element.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tstartEmbeddedContent( element ) {\n\n\t\tif( element && !this.Reveal.isSpeakerNotes() ) {\n\n\t\t\t// Restart GIFs\n\t\t\tqueryAll( element, 'img[src$=\".gif\"]' ).forEach( el => {\n\t\t\t\t// Setting the same unchanged source like this was confirmed\n\t\t\t\t// to work in Chrome, FF & Safari\n\t\t\t\tel.setAttribute( 'src', el.getAttribute( 'src' ) );\n\t\t\t} );\n\n\t\t\t// HTML5 media elements\n\t\t\tqueryAll( element, 'video, audio' ).forEach( el => {\n\t\t\t\tif( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\t// Prefer an explicit global autoplay setting\n\t\t\t\tlet autoplay = this.Reveal.getConfig().autoPlayMedia;\n\n\t\t\t\t// If no global setting is available, fall back on the element's\n\t\t\t\t// own autoplay setting\n\t\t\t\tif( typeof autoplay !== 'boolean' ) {\n\t\t\t\t\tautoplay = el.hasAttribute( 'data-autoplay' ) || !!closest( el, '.slide-background' );\n\t\t\t\t}\n\n\t\t\t\tif( autoplay && typeof el.play === 'function' ) {\n\n\t\t\t\t\t// If the media is ready, start playback\n\t\t\t\t\tif( el.readyState > 1 ) {\n\t\t\t\t\t\tthis.startEmbeddedMedia( { target: el } );\n\t\t\t\t\t}\n\t\t\t\t\t// Mobile devices never fire a loaded event so instead\n\t\t\t\t\t// of waiting, we initiate playback\n\t\t\t\t\telse if( isMobile ) {\n\t\t\t\t\t\tlet promise = el.play();\n\n\t\t\t\t\t\t// If autoplay does not work, ensure that the controls are visible so\n\t\t\t\t\t\t// that the viewer can start the media on their own\n\t\t\t\t\t\tif( promise && typeof promise.catch === 'function' && el.controls === false ) {\n\t\t\t\t\t\t\tpromise.catch( () => {\n\t\t\t\t\t\t\t\tel.controls = true;\n\n\t\t\t\t\t\t\t\t// Once the video does start playing, hide the controls again\n\t\t\t\t\t\t\t\tel.addEventListener( 'play', () => {\n\t\t\t\t\t\t\t\t\tel.controls = false;\n\t\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\t// If the media isn't loaded, wait before playing\n\t\t\t\t\telse {\n\t\t\t\t\t\tel.removeEventListener( 'loadeddata', this.startEmbeddedMedia ); // remove first to avoid dupes\n\t\t\t\t\t\tel.addEventListener( 'loadeddata', this.startEmbeddedMedia );\n\t\t\t\t\t}\n\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\t// Normal iframes\n\t\t\tqueryAll( element, 'iframe[src]' ).forEach( el => {\n\t\t\t\tif( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tthis.startEmbeddedIframe( { target: el } );\n\t\t\t} );\n\n\t\t\t// Lazy loading iframes\n\t\t\tqueryAll( element, 'iframe[data-src]' ).forEach( el => {\n\t\t\t\tif( closest( el, '.fragment' ) && !closest( el, '.fragment.visible' ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tif( el.getAttribute( 'src' ) !== el.getAttribute( 'data-src' ) ) {\n\t\t\t\t\tel.removeEventListener( 'load', this.startEmbeddedIframe ); // remove first to avoid dupes\n\t\t\t\t\tel.addEventListener( 'load', this.startEmbeddedIframe );\n\t\t\t\t\tel.setAttribute( 'src', el.getAttribute( 'data-src' ) );\n\t\t\t\t}\n\t\t\t} );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Starts playing an embedded video/audio element after\n\t * it has finished loading.\n\t *\n\t * @param {object} event\n\t */\n\tstartEmbeddedMedia( event ) {\n\n\t\tlet isAttachedToDOM = !!closest( event.target, 'html' ),\n\t\t\tisVisible \t\t= !!closest( event.target, '.present' );\n\n\t\tif( isAttachedToDOM && isVisible ) {\n\t\t\t// Don't restart if media is already playing\n\t\t\tif( event.target.paused || event.target.ended ) {\n\t\t\t\tevent.target.currentTime = 0;\n\t\t\t\tevent.target.play();\n\t\t\t}\n\t\t}\n\n\t\tevent.target.removeEventListener( 'loadeddata', this.startEmbeddedMedia );\n\n\t}\n\n\t/**\n\t * \"Starts\" the content of an embedded iframe using the\n\t * postMessage API.\n\t *\n\t * @param {object} event\n\t */\n\tstartEmbeddedIframe( event ) {\n\n\t\tlet iframe = event.target;\n\n\t\tif( iframe && iframe.contentWindow ) {\n\n\t\t\tlet isAttachedToDOM = !!closest( event.target, 'html' ),\n\t\t\t\tisVisible \t\t= !!closest( event.target, '.present' );\n\n\t\t\tif( isAttachedToDOM && isVisible ) {\n\n\t\t\t\t// Prefer an explicit global autoplay setting\n\t\t\t\tlet autoplay = this.Reveal.getConfig().autoPlayMedia;\n\n\t\t\t\t// If no global setting is available, fall back on the element's\n\t\t\t\t// own autoplay setting\n\t\t\t\tif( typeof autoplay !== 'boolean' ) {\n\t\t\t\t\tautoplay = iframe.hasAttribute( 'data-autoplay' ) || !!closest( iframe, '.slide-background' );\n\t\t\t\t}\n\n\t\t\t\t// YouTube postMessage API\n\t\t\t\tif( /youtube\\.com\\/embed\\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {\n\t\t\t\t\tiframe.contentWindow.postMessage( '{\"event\":\"command\",\"func\":\"playVideo\",\"args\":\"\"}', '*' );\n\t\t\t\t}\n\t\t\t\t// Vimeo postMessage API\n\t\t\t\telse if( /player\\.vimeo\\.com\\//.test( iframe.getAttribute( 'src' ) ) && autoplay ) {\n\t\t\t\t\tiframe.contentWindow.postMessage( '{\"method\":\"play\"}', '*' );\n\t\t\t\t}\n\t\t\t\t// Generic postMessage API\n\t\t\t\telse {\n\t\t\t\t\tiframe.contentWindow.postMessage( 'slide:start', '*' );\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Stop playback of any embedded content inside of\n\t * the targeted slide.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tstopEmbeddedContent( element, options = {} ) {\n\n\t\toptions = extend( {\n\t\t\t// Defaults\n\t\t\tunloadIframes: true\n\t\t}, options );\n\n\t\tif( element && element.parentNode ) {\n\t\t\t// HTML5 media elements\n\t\t\tqueryAll( element, 'video, audio' ).forEach( el => {\n\t\t\t\tif( !el.hasAttribute( 'data-ignore' ) && typeof el.pause === 'function' ) {\n\t\t\t\t\tel.setAttribute('data-paused-by-reveal', '');\n\t\t\t\t\tel.pause();\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\t// Generic postMessage API for non-lazy loaded iframes\n\t\t\tqueryAll( element, 'iframe' ).forEach( el => {\n\t\t\t\tif( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' );\n\t\t\t\tel.removeEventListener( 'load', this.startEmbeddedIframe );\n\t\t\t});\n\n\t\t\t// YouTube postMessage API\n\t\t\tqueryAll( element, 'iframe[src*=\"youtube.com/embed/\"]' ).forEach( el => {\n\t\t\t\tif( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {\n\t\t\t\t\tel.contentWindow.postMessage( '{\"event\":\"command\",\"func\":\"pauseVideo\",\"args\":\"\"}', '*' );\n\t\t\t\t}\n\t\t\t});\n\n\t\t\t// Vimeo postMessage API\n\t\t\tqueryAll( element, 'iframe[src*=\"player.vimeo.com/\"]' ).forEach( el => {\n\t\t\t\tif( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {\n\t\t\t\t\tel.contentWindow.postMessage( '{\"method\":\"pause\"}', '*' );\n\t\t\t\t}\n\t\t\t});\n\n\t\t\tif( options.unloadIframes === true ) {\n\t\t\t\t// Unload lazy-loaded iframes\n\t\t\t\tqueryAll( element, 'iframe[data-src]' ).forEach( el => {\n\t\t\t\t\t// Only removing the src doesn't actually unload the frame\n\t\t\t\t\t// in all browsers (Firefox) so we set it to blank first\n\t\t\t\t\tel.setAttribute( 'src', 'about:blank' );\n\t\t\t\t\tel.removeAttribute( 'src' );\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\n\t}\n\n}\n","\nexport const SLIDES_SELECTOR = '.slides section';\nexport const HORIZONTAL_SLIDES_SELECTOR = '.slides>section';\nexport const VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section';\nexport const HORIZONTAL_BACKGROUNDS_SELECTOR = '.backgrounds>.slide-background';\n\n// Methods that may not be invoked via the postMessage API\nexport const POST_MESSAGE_METHOD_BLACKLIST = /registerPlugin|registerKeyboardShortcut|addKeyBinding|addEventListener|showPreview/;\n\n// Regex for retrieving the fragment style from a class attribute\nexport const FRAGMENT_STYLE_REGEX = /fade-(down|up|right|left|out|in-then-out|in-then-semi-out)|semi-fade-out|current-visible|shrink|grow/;\n\n// Slide number formats\nexport const SLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL = 'h.v';\nexport const SLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL = 'h/v';\nexport const SLIDE_NUMBER_FORMAT_CURRENT = 'c';\nexport const SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL = 'c/t';","import {\n\tSLIDE_NUMBER_FORMAT_CURRENT,\n\tSLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL,\n\tSLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL,\n\tSLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL\n} from \"../utils/constants\";\n\n/**\n * Handles the display of reveal.js' optional slide number.\n */\nexport default class SlideNumber {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'slide-number';\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tlet slideNumberDisplay = 'none';\n\t\tif( config.slideNumber && !this.Reveal.isPrintView() ) {\n\t\t\tif( config.showSlideNumber === 'all' ) {\n\t\t\t\tslideNumberDisplay = 'block';\n\t\t\t}\n\t\t\telse if( config.showSlideNumber === 'speaker' && this.Reveal.isSpeakerNotes() ) {\n\t\t\t\tslideNumberDisplay = 'block';\n\t\t\t}\n\t\t}\n\n\t\tthis.element.style.display = slideNumberDisplay;\n\n\t}\n\n\t/**\n\t * Updates the slide number to match the current slide.\n\t */\n\tupdate() {\n\n\t\t// Update slide number if enabled\n\t\tif( this.Reveal.getConfig().slideNumber && this.element ) {\n\t\t\tthis.element.innerHTML = this.getSlideNumber();\n\t\t}\n\n\t}\n\n\t/**\n\t * Returns the HTML string corresponding to the current slide\n\t * number, including formatting.\n\t */\n\tgetSlideNumber( slide = this.Reveal.getCurrentSlide() ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\t\tlet value;\n\t\tlet format = SLIDE_NUMBER_FORMAT_HORIZONTAL_DOT_VERTICAL;\n\n\t\tif ( typeof config.slideNumber === 'function' ) {\n\t\t\tvalue = config.slideNumber( slide );\n\t\t} else {\n\t\t\t// Check if a custom number format is available\n\t\t\tif( typeof config.slideNumber === 'string' ) {\n\t\t\t\tformat = config.slideNumber;\n\t\t\t}\n\n\t\t\t// If there are ONLY vertical slides in this deck, always use\n\t\t\t// a flattened slide number\n\t\t\tif( !/c/.test( format ) && this.Reveal.getHorizontalSlides().length === 1 ) {\n\t\t\t\tformat = SLIDE_NUMBER_FORMAT_CURRENT;\n\t\t\t}\n\n\t\t\t// Offset the current slide number by 1 to make it 1-indexed\n\t\t\tlet horizontalOffset = slide && slide.dataset.visibility === 'uncounted' ? 0 : 1;\n\n\t\t\tvalue = [];\n\t\t\tswitch( format ) {\n\t\t\t\tcase SLIDE_NUMBER_FORMAT_CURRENT:\n\t\t\t\t\tvalue.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset );\n\t\t\t\t\tbreak;\n\t\t\t\tcase SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL:\n\t\t\t\t\tvalue.push( this.Reveal.getSlidePastCount( slide ) + horizontalOffset, '/', this.Reveal.getTotalSlides() );\n\t\t\t\t\tbreak;\n\t\t\t\tdefault:\n\t\t\t\t\tlet indices = this.Reveal.getIndices( slide );\n\t\t\t\t\tvalue.push( indices.h + horizontalOffset );\n\t\t\t\t\tlet sep = format === SLIDE_NUMBER_FORMAT_HORIZONTAL_SLASH_VERTICAL ? '/' : '.';\n\t\t\t\t\tif( this.Reveal.isVerticalSlide( slide ) ) value.push( sep, indices.v + 1 );\n\t\t\t}\n\t\t}\n\n\t\tlet url = '#' + this.Reveal.location.getHash( slide );\n\t\treturn this.formatNumber( value[0], value[1], value[2], url );\n\n\t}\n\n\t/**\n\t * Applies HTML formatting to a slide number before it's\n\t * written to the DOM.\n\t *\n\t * @param {number} a Current slide\n\t * @param {string} delimiter Character to separate slide numbers\n\t * @param {(number|*)} b Total slides\n\t * @param {HTMLElement} [url='#'+locationHash()] The url to link to\n\t * @return {string} HTML string fragment\n\t */\n\tformatNumber( a, delimiter, b, url = '#' + this.Reveal.location.getHash() ) {\n\n\t\tif( typeof b === 'number' && !isNaN( b ) ) {\n\t\t\treturn `<a href=\"${url}\">\n\t\t\t\t\t<span class=\"slide-number-a\">${a}</span>\n\t\t\t\t\t<span class=\"slide-number-delimiter\">${delimiter}</span>\n\t\t\t\t\t<span class=\"slide-number-b\">${b}</span>\n\t\t\t\t\t</a>`;\n\t\t}\n\t\telse {\n\t\t\treturn `<a href=\"${url}\">\n\t\t\t\t\t<span class=\"slide-number-a\">${a}</span>\n\t\t\t\t\t</a>`;\n\t\t}\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}","import {\n\tSLIDE_NUMBER_FORMAT_CURRENT,\n\tSLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL\n} from \"../utils/constants\";\n\n/**\n * Makes it possible to jump to a slide by entering its\n * slide number or id.\n */\nexport default class JumpToSlide {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onInput = this.onInput.bind( this );\n\t\tthis.onBlur = this.onBlur.bind( this );\n\t\tthis.onKeyDown = this.onKeyDown.bind( this );\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'jump-to-slide';\n\n this.jumpInput = document.createElement( 'input' );\n this.jumpInput.type = 'text';\n this.jumpInput.className = 'jump-to-slide-input';\n this.jumpInput.placeholder = 'Jump to slide';\n\t\tthis.jumpInput.addEventListener( 'input', this.onInput );\n\t\tthis.jumpInput.addEventListener( 'keydown', this.onKeyDown );\n\t\tthis.jumpInput.addEventListener( 'blur', this.onBlur );\n\n this.element.appendChild( this.jumpInput );\n\n\t}\n\n\tshow() {\n\n\t\tthis.indicesOnShow = this.Reveal.getIndices();\n\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\t\tthis.jumpInput.focus();\n\n\t}\n\n\thide() {\n\n\t\tif( this.isVisible() ) {\n\t\t\tthis.element.remove();\n\t\t\tthis.jumpInput.value = '';\n\n\t\t\tclearTimeout( this.jumpTimeout );\n\t\t\tdelete this.jumpTimeout;\n\t\t}\n\n\t}\n\n\tisVisible() {\n\n\t\treturn !!this.element.parentNode;\n\n\t}\n\n\t/**\n\t * Parses the current input and jumps to the given slide.\n\t */\n\tjump() {\n\n\t\tclearTimeout( this.jumpTimeout );\n\t\tdelete this.jumpTimeout;\n\n\t\tlet query = this.jumpInput.value.trim( '' );\n\t\tlet indices;\n\n\t\t// When slide numbers are formatted to be a single linear mumber\n\t\t// (instead of showing a separate horizontal/vertical index) we\n\t\t// use the same format for slide jumps\n\t\tif( /^\\d+$/.test( query ) ) {\n\t\t\tconst slideNumberFormat = this.Reveal.getConfig().slideNumber;\n\t\t\tif( slideNumberFormat === SLIDE_NUMBER_FORMAT_CURRENT || slideNumberFormat === SLIDE_NUMBER_FORMAT_CURRENT_SLASH_TOTAL ) {\n\t\t\t\tconst slide = this.Reveal.getSlides()[ parseInt( query, 10 ) - 1 ];\n\t\t\t\tif( slide ) {\n\t\t\t\t\tindices = this.Reveal.getIndices( slide );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif( !indices ) {\n\t\t\t// If the query uses \"horizontal.vertical\" format, convert to\n\t\t\t// \"horizontal/vertical\" so that our URL parser can understand\n\t\t\tif( /^\\d+\\.\\d+$/.test( query ) ) {\n\t\t\t\tquery = query.replace( '.', '/' );\n\t\t\t}\n\n\t\t\tindices = this.Reveal.location.getIndicesFromHash( query, { oneBasedIndex: true } );\n\t\t}\n\n\t\t// Still no valid index? Fall back on a text search\n\t\tif( !indices && /\\S+/i.test( query ) && query.length > 1 ) {\n\t\t\tindices = this.search( query );\n\t\t}\n\n\t\tif( indices && query !== '' ) {\n\t\t\tthis.Reveal.slide( indices.h, indices.v, indices.f );\n\t\t\treturn true;\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.slide( this.indicesOnShow.h, this.indicesOnShow.v, this.indicesOnShow.f );\n\t\t\treturn false;\n\t\t}\n\n\t}\n\n\tjumpAfter( delay ) {\n\n\t\tclearTimeout( this.jumpTimeout );\n\t\tthis.jumpTimeout = setTimeout( () => this.jump(), delay );\n\n\t}\n\n\t/**\n\t * A lofi search that looks for the given query in all\n\t * of our slides and returns the first match.\n\t */\n\tsearch( query ) {\n\n\t\tconst regex = new RegExp( '\\\\b' + query.trim() + '\\\\b', 'i' );\n\n\t\tconst slide = this.Reveal.getSlides().find( ( slide ) => {\n\t\t\treturn regex.test( slide.innerText );\n\t\t} );\n\n\t\tif( slide ) {\n\t\t\treturn this.Reveal.getIndices( slide );\n\t\t}\n\t\telse {\n\t\t\treturn null;\n\t\t}\n\n\t}\n\n\t/**\n\t * Reverts back to the slide we were on when jump to slide was\n\t * invoked.\n\t */\n\tcancel() {\n\n\t\tthis.Reveal.slide( this.indicesOnShow.h, this.indicesOnShow.v, this.indicesOnShow.f );\n\t\tthis.hide();\n\n\t}\n\n\tconfirm() {\n\n\t\tthis.jump();\n\t\tthis.hide();\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.jumpInput.removeEventListener( 'input', this.onInput );\n\t\tthis.jumpInput.removeEventListener( 'keydown', this.onKeyDown );\n\t\tthis.jumpInput.removeEventListener( 'blur', this.onBlur );\n\n\t\tthis.element.remove();\n\n\t}\n\n\tonKeyDown( event ) {\n\n\t\tif( event.keyCode === 13 ) {\n\t\t\tthis.confirm();\n\t\t}\n\t\telse if( event.keyCode === 27 ) {\n\t\t\tthis.cancel();\n\n\t\t\tevent.stopImmediatePropagation();\n\t\t}\n\n\t}\n\n\tonInput( event ) {\n\n\t\tthis.jumpAfter( 200 );\n\n\t}\n\n\tonBlur() {\n\n\t\tsetTimeout( () => this.hide(), 1 );\n\n\t}\n\n}","/**\n * Converts various color input formats to an {r:0,g:0,b:0} object.\n *\n * @param {string} color The string representation of a color\n * @example\n * colorToRgb('#000');\n * @example\n * colorToRgb('#000000');\n * @example\n * colorToRgb('rgb(0,0,0)');\n * @example\n * colorToRgb('rgba(0,0,0)');\n *\n * @return {{r: number, g: number, b: number, [a]: number}|null}\n */\nexport const colorToRgb = ( color ) => {\n\n\tlet hex3 = color.match( /^#([0-9a-f]{3})$/i );\n\tif( hex3 && hex3[1] ) {\n\t\thex3 = hex3[1];\n\t\treturn {\n\t\t\tr: parseInt( hex3.charAt( 0 ), 16 ) * 0x11,\n\t\t\tg: parseInt( hex3.charAt( 1 ), 16 ) * 0x11,\n\t\t\tb: parseInt( hex3.charAt( 2 ), 16 ) * 0x11\n\t\t};\n\t}\n\n\tlet hex6 = color.match( /^#([0-9a-f]{6})$/i );\n\tif( hex6 && hex6[1] ) {\n\t\thex6 = hex6[1];\n\t\treturn {\n\t\t\tr: parseInt( hex6.slice( 0, 2 ), 16 ),\n\t\t\tg: parseInt( hex6.slice( 2, 4 ), 16 ),\n\t\t\tb: parseInt( hex6.slice( 4, 6 ), 16 )\n\t\t};\n\t}\n\n\tlet rgb = color.match( /^rgb\\s*\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*\\)$/i );\n\tif( rgb ) {\n\t\treturn {\n\t\t\tr: parseInt( rgb[1], 10 ),\n\t\t\tg: parseInt( rgb[2], 10 ),\n\t\t\tb: parseInt( rgb[3], 10 )\n\t\t};\n\t}\n\n\tlet rgba = color.match( /^rgba\\s*\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*\\,\\s*([\\d]+|[\\d]*.[\\d]+)\\s*\\)$/i );\n\tif( rgba ) {\n\t\treturn {\n\t\t\tr: parseInt( rgba[1], 10 ),\n\t\t\tg: parseInt( rgba[2], 10 ),\n\t\t\tb: parseInt( rgba[3], 10 ),\n\t\t\ta: parseFloat( rgba[4] )\n\t\t};\n\t}\n\n\treturn null;\n\n}\n\n/**\n * Calculates brightness on a scale of 0-255.\n *\n * @param {string} color See colorToRgb for supported formats.\n * @see {@link colorToRgb}\n */\nexport const colorBrightness = ( color ) => {\n\n\tif( typeof color === 'string' ) color = colorToRgb( color );\n\n\tif( color ) {\n\t\treturn ( color.r * 299 + color.g * 587 + color.b * 114 ) / 1000;\n\t}\n\n\treturn null;\n\n}","import { queryAll } from '../utils/util.js'\nimport { colorToRgb, colorBrightness } from '../utils/color.js'\n\n/**\n * Creates and updates slide backgrounds.\n */\nexport default class Backgrounds {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'backgrounds';\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t}\n\n\t/**\n\t * Creates the slide background elements and appends them\n\t * to the background container. One element is created per\n\t * slide no matter if the given slide has visible background.\n\t */\n\tcreate() {\n\n\t\t// Clear prior backgrounds\n\t\tthis.element.innerHTML = '';\n\t\tthis.element.classList.add( 'no-transition' );\n\n\t\t// Iterate over all horizontal slides\n\t\tthis.Reveal.getHorizontalSlides().forEach( slideh => {\n\n\t\t\tlet backgroundStack = this.createBackground( slideh, this.element );\n\n\t\t\t// Iterate over all vertical slides\n\t\t\tqueryAll( slideh, 'section' ).forEach( slidev => {\n\n\t\t\t\tthis.createBackground( slidev, backgroundStack );\n\n\t\t\t\tbackgroundStack.classList.add( 'stack' );\n\n\t\t\t} );\n\n\t\t} );\n\n\t\t// Add parallax background if specified\n\t\tif( this.Reveal.getConfig().parallaxBackgroundImage ) {\n\n\t\t\tthis.element.style.backgroundImage = 'url(\"' + this.Reveal.getConfig().parallaxBackgroundImage + '\")';\n\t\t\tthis.element.style.backgroundSize = this.Reveal.getConfig().parallaxBackgroundSize;\n\t\t\tthis.element.style.backgroundRepeat = this.Reveal.getConfig().parallaxBackgroundRepeat;\n\t\t\tthis.element.style.backgroundPosition = this.Reveal.getConfig().parallaxBackgroundPosition;\n\n\t\t\t// Make sure the below properties are set on the element - these properties are\n\t\t\t// needed for proper transitions to be set on the element via CSS. To remove\n\t\t\t// annoying background slide-in effect when the presentation starts, apply\n\t\t\t// these properties after short time delay\n\t\t\tsetTimeout( () => {\n\t\t\t\tthis.Reveal.getRevealElement().classList.add( 'has-parallax-background' );\n\t\t\t}, 1 );\n\n\t\t}\n\t\telse {\n\n\t\t\tthis.element.style.backgroundImage = '';\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'has-parallax-background' );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Creates a background for the given slide.\n\t *\n\t * @param {HTMLElement} slide\n\t * @param {HTMLElement} container The element that the background\n\t * should be appended to\n\t * @return {HTMLElement} New background div\n\t */\n\tcreateBackground( slide, container ) {\n\n\t\t// Main slide background element\n\t\tlet element = document.createElement( 'div' );\n\t\telement.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' );\n\n\t\t// Inner background element that wraps images/videos/iframes\n\t\tlet contentElement = document.createElement( 'div' );\n\t\tcontentElement.className = 'slide-background-content';\n\n\t\telement.appendChild( contentElement );\n\t\tcontainer.appendChild( element );\n\n\t\tslide.slideBackgroundElement = element;\n\t\tslide.slideBackgroundContentElement = contentElement;\n\n\t\t// Syncs the background to reflect all current background settings\n\t\tthis.sync( slide );\n\n\t\treturn element;\n\n\t}\n\n\t/**\n\t * Renders all of the visual properties of a slide background\n\t * based on the various background attributes.\n\t *\n\t * @param {HTMLElement} slide\n\t */\n\tsync( slide ) {\n\n\t\tconst element = slide.slideBackgroundElement,\n\t\t\tcontentElement = slide.slideBackgroundContentElement;\n\n\t\tconst data = {\n\t\t\tbackground: slide.getAttribute( 'data-background' ),\n\t\t\tbackgroundSize: slide.getAttribute( 'data-background-size' ),\n\t\t\tbackgroundImage: slide.getAttribute( 'data-background-image' ),\n\t\t\tbackgroundVideo: slide.getAttribute( 'data-background-video' ),\n\t\t\tbackgroundIframe: slide.getAttribute( 'data-background-iframe' ),\n\t\t\tbackgroundColor: slide.getAttribute( 'data-background-color' ),\n\t\t\tbackgroundGradient: slide.getAttribute( 'data-background-gradient' ),\n\t\t\tbackgroundRepeat: slide.getAttribute( 'data-background-repeat' ),\n\t\t\tbackgroundPosition: slide.getAttribute( 'data-background-position' ),\n\t\t\tbackgroundTransition: slide.getAttribute( 'data-background-transition' ),\n\t\t\tbackgroundOpacity: slide.getAttribute( 'data-background-opacity' ),\n\t\t};\n\n\t\tconst dataPreload = slide.hasAttribute( 'data-preload' );\n\n\t\t// Reset the prior background state in case this is not the\n\t\t// initial sync\n\t\tslide.classList.remove( 'has-dark-background' );\n\t\tslide.classList.remove( 'has-light-background' );\n\n\t\telement.removeAttribute( 'data-loaded' );\n\t\telement.removeAttribute( 'data-background-hash' );\n\t\telement.removeAttribute( 'data-background-size' );\n\t\telement.removeAttribute( 'data-background-transition' );\n\t\telement.style.backgroundColor = '';\n\n\t\tcontentElement.style.backgroundSize = '';\n\t\tcontentElement.style.backgroundRepeat = '';\n\t\tcontentElement.style.backgroundPosition = '';\n\t\tcontentElement.style.backgroundImage = '';\n\t\tcontentElement.style.opacity = '';\n\t\tcontentElement.innerHTML = '';\n\n\t\tif( data.background ) {\n\t\t\t// Auto-wrap image urls in url(...)\n\t\t\tif( /^(http|file|\\/\\/)/gi.test( data.background ) || /\\.(svg|png|jpg|jpeg|gif|bmp|webp)([?#\\s]|$)/gi.test( data.background ) ) {\n\t\t\t\tslide.setAttribute( 'data-background-image', data.background );\n\t\t\t}\n\t\t\telse {\n\t\t\t\telement.style.background = data.background;\n\t\t\t}\n\t\t}\n\n\t\t// Create a hash for this combination of background settings.\n\t\t// This is used to determine when two slide backgrounds are\n\t\t// the same.\n\t\tif( data.background || data.backgroundColor || data.backgroundGradient || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) {\n\t\t\telement.setAttribute( 'data-background-hash', data.background +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundSize +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundImage +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundVideo +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundIframe +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundColor +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundGradient +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundRepeat +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundPosition +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundTransition +\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tdata.backgroundOpacity );\n\t\t}\n\n\t\t// Additional and optional background properties\n\t\tif( data.backgroundSize ) element.setAttribute( 'data-background-size', data.backgroundSize );\n\t\tif( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor;\n\t\tif( data.backgroundGradient ) element.style.backgroundImage = data.backgroundGradient;\n\t\tif( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition );\n\n\t\tif( dataPreload ) element.setAttribute( 'data-preload', '' );\n\n\t\t// Background image options are set on the content wrapper\n\t\tif( data.backgroundSize ) contentElement.style.backgroundSize = data.backgroundSize;\n\t\tif( data.backgroundRepeat ) contentElement.style.backgroundRepeat = data.backgroundRepeat;\n\t\tif( data.backgroundPosition ) contentElement.style.backgroundPosition = data.backgroundPosition;\n\t\tif( data.backgroundOpacity ) contentElement.style.opacity = data.backgroundOpacity;\n\n\t\tconst contrastClass = this.getContrastClass( slide );\n\n\t\tif( typeof contrastClass === 'string' ) {\n\t\t\tslide.classList.add( contrastClass );\n\t\t}\n\n\t}\n\n\t/**\n\t * Returns a class name that can be applied to a slide to indicate\n\t * if it has a light or dark background.\n\t *\n\t * @param {*} slide\n\t *\n\t * @returns {string|null}\n\t */\n\tgetContrastClass( slide ) {\n\n\t\tconst element = slide.slideBackgroundElement;\n\n\t\t// If this slide has a background color, we add a class that\n\t\t// signals if it is light or dark. If the slide has no background\n\t\t// color, no class will be added\n\t\tlet contrastColor = slide.getAttribute( 'data-background-color' );\n\n\t\t// If no bg color was found, or it cannot be converted by colorToRgb, check the computed background\n\t\tif( !contrastColor || !colorToRgb( contrastColor ) ) {\n\t\t\tlet computedBackgroundStyle = window.getComputedStyle( element );\n\t\t\tif( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {\n\t\t\t\tcontrastColor = computedBackgroundStyle.backgroundColor;\n\t\t\t}\n\t\t}\n\n\t\tif( contrastColor ) {\n\t\t\tconst rgb = colorToRgb( contrastColor );\n\n\t\t\t// Ignore fully transparent backgrounds. Some browsers return\n\t\t\t// rgba(0,0,0,0) when reading the computed background color of\n\t\t\t// an element with no background\n\t\t\tif( rgb && rgb.a !== 0 ) {\n\t\t\t\tif( colorBrightness( contrastColor ) < 128 ) {\n\t\t\t\t\treturn 'has-dark-background';\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\treturn 'has-light-background';\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\n\t}\n\n\t/**\n\t * Bubble the 'has-light-background'/'has-dark-background' classes.\n\t */\n\tbubbleSlideContrastClassToElement( slide, target ) {\n\n\t\t[ 'has-light-background', 'has-dark-background' ].forEach( classToBubble => {\n\t\t\tif( slide.classList.contains( classToBubble ) ) {\n\t\t\t\ttarget.classList.add( classToBubble );\n\t\t\t}\n\t\t\telse {\n\t\t\t\ttarget.classList.remove( classToBubble );\n\t\t\t}\n\t\t}, this );\n\n\t}\n\n\t/**\n\t * Updates the background elements to reflect the current\n\t * slide.\n\t *\n\t * @param {boolean} includeAll If true, the backgrounds of\n\t * all vertical slides (not just the present) will be updated.\n\t */\n\tupdate( includeAll = false ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tlet indices = this.Reveal.getIndices();\n\n\t\tlet currentBackground = null;\n\n\t\t// Reverse past/future classes when in RTL mode\n\t\tlet horizontalPast = config.rtl ? 'future' : 'past',\n\t\t\thorizontalFuture = config.rtl ? 'past' : 'future';\n\n\t\t// Update the classes of all backgrounds to match the\n\t\t// states of their slides (past/present/future)\n\t\tArray.from( this.element.childNodes ).forEach( ( backgroundh, h ) => {\n\n\t\t\tbackgroundh.classList.remove( 'past', 'present', 'future' );\n\n\t\t\tif( h < indices.h ) {\n\t\t\t\tbackgroundh.classList.add( horizontalPast );\n\t\t\t}\n\t\t\telse if ( h > indices.h ) {\n\t\t\t\tbackgroundh.classList.add( horizontalFuture );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tbackgroundh.classList.add( 'present' );\n\n\t\t\t\t// Store a reference to the current background element\n\t\t\t\tcurrentBackground = backgroundh;\n\t\t\t}\n\n\t\t\tif( includeAll || h === indices.h ) {\n\t\t\t\tqueryAll( backgroundh, '.slide-background' ).forEach( ( backgroundv, v ) => {\n\n\t\t\t\t\tbackgroundv.classList.remove( 'past', 'present', 'future' );\n\n\t\t\t\t\tconst indexv = typeof indices.v === 'number' ? indices.v : 0;\n\n\t\t\t\t\tif( v < indexv ) {\n\t\t\t\t\t\tbackgroundv.classList.add( 'past' );\n\t\t\t\t\t}\n\t\t\t\t\telse if ( v > indexv ) {\n\t\t\t\t\t\tbackgroundv.classList.add( 'future' );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tbackgroundv.classList.add( 'present' );\n\n\t\t\t\t\t\t// Only if this is the present horizontal and vertical slide\n\t\t\t\t\t\tif( h === indices.h ) currentBackground = backgroundv;\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\t\t\t}\n\n\t\t} );\n\n\t\t// The previous background may refer to a DOM element that has\n\t\t// been removed after a presentation is synced & bgs are recreated\n\t\tif( this.previousBackground && !this.previousBackground.closest( 'body' ) ) {\n\t\t\tthis.previousBackground = null;\n\t\t}\n\n\t\tif( currentBackground && this.previousBackground ) {\n\n\t\t\t// Don't transition between identical backgrounds. This\n\t\t\t// prevents unwanted flicker.\n\t\t\tlet previousBackgroundHash = this.previousBackground.getAttribute( 'data-background-hash' );\n\t\t\tlet currentBackgroundHash = currentBackground.getAttribute( 'data-background-hash' );\n\n\t\t\tif( currentBackgroundHash && currentBackgroundHash === previousBackgroundHash && currentBackground !== this.previousBackground ) {\n\t\t\t\tthis.element.classList.add( 'no-transition' );\n\n\t\t\t\t// If multiple slides have the same background video, carry\n\t\t\t\t// the <video> element forward so that it plays continuously\n\t\t\t\t// across multiple slides\n\t\t\t\tconst currentVideo = currentBackground.querySelector( 'video' );\n\t\t\t\tconst previousVideo = this.previousBackground.querySelector( 'video' );\n\n\t\t\t\tif( currentVideo && previousVideo ) {\n\n\t\t\t\t\tconst currentVideoParent = currentVideo.parentNode;\n\t\t\t\t\tconst previousVideoParent = previousVideo.parentNode;\n\n\t\t\t\t\t// Swap the two videos\n\t\t\t\t\tpreviousVideoParent.appendChild( currentVideo );\n\t\t\t\t\tcurrentVideoParent.appendChild( previousVideo );\n\n\t\t\t\t}\n\t\t\t}\n\n\t\t}\n\n\t\t// Stop content inside of previous backgrounds\n\t\tif( this.previousBackground ) {\n\n\t\t\tthis.Reveal.slideContent.stopEmbeddedContent( this.previousBackground, { unloadIframes: !this.Reveal.slideContent.shouldPreload( this.previousBackground ) } );\n\n\t\t}\n\n\t\t// Start content in the current background\n\t\tif( currentBackground ) {\n\n\t\t\tthis.Reveal.slideContent.startEmbeddedContent( currentBackground );\n\n\t\t\tlet currentBackgroundContent = currentBackground.querySelector( '.slide-background-content' );\n\t\t\tif( currentBackgroundContent ) {\n\n\t\t\t\tlet backgroundImageURL = currentBackgroundContent.style.backgroundImage || '';\n\n\t\t\t\t// Restart GIFs (doesn't work in Firefox)\n\t\t\t\tif( /\\.gif/i.test( backgroundImageURL ) ) {\n\t\t\t\t\tcurrentBackgroundContent.style.backgroundImage = '';\n\t\t\t\t\twindow.getComputedStyle( currentBackgroundContent ).opacity;\n\t\t\t\t\tcurrentBackgroundContent.style.backgroundImage = backgroundImageURL;\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis.previousBackground = currentBackground;\n\n\t\t}\n\n\t\t// If there's a background brightness flag for this slide,\n\t\t// bubble it to the .reveal container\n\t\tif( currentSlide ) {\n\t\t\tthis.bubbleSlideContrastClassToElement( currentSlide, this.Reveal.getRevealElement() );\n\t\t}\n\n\t\t// Allow the first background to apply without transition\n\t\tsetTimeout( () => {\n\t\t\tthis.element.classList.remove( 'no-transition' );\n\t\t}, 10 );\n\n\t}\n\n\t/**\n\t * Updates the position of the parallax background based\n\t * on the current slide index.\n\t */\n\tupdateParallax() {\n\n\t\tlet indices = this.Reveal.getIndices();\n\n\t\tif( this.Reveal.getConfig().parallaxBackgroundImage ) {\n\n\t\t\tlet horizontalSlides = this.Reveal.getHorizontalSlides(),\n\t\t\t\tverticalSlides = this.Reveal.getVerticalSlides();\n\n\t\t\tlet backgroundSize = this.element.style.backgroundSize.split( ' ' ),\n\t\t\t\tbackgroundWidth, backgroundHeight;\n\n\t\t\tif( backgroundSize.length === 1 ) {\n\t\t\t\tbackgroundWidth = backgroundHeight = parseInt( backgroundSize[0], 10 );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tbackgroundWidth = parseInt( backgroundSize[0], 10 );\n\t\t\t\tbackgroundHeight = parseInt( backgroundSize[1], 10 );\n\t\t\t}\n\n\t\t\tlet slideWidth = this.element.offsetWidth,\n\t\t\t\thorizontalSlideCount = horizontalSlides.length,\n\t\t\t\thorizontalOffsetMultiplier,\n\t\t\t\thorizontalOffset;\n\n\t\t\tif( typeof this.Reveal.getConfig().parallaxBackgroundHorizontal === 'number' ) {\n\t\t\t\thorizontalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundHorizontal;\n\t\t\t}\n\t\t\telse {\n\t\t\t\thorizontalOffsetMultiplier = horizontalSlideCount > 1 ? ( backgroundWidth - slideWidth ) / ( horizontalSlideCount-1 ) : 0;\n\t\t\t}\n\n\t\t\thorizontalOffset = horizontalOffsetMultiplier * indices.h * -1;\n\n\t\t\tlet slideHeight = this.element.offsetHeight,\n\t\t\t\tverticalSlideCount = verticalSlides.length,\n\t\t\t\tverticalOffsetMultiplier,\n\t\t\t\tverticalOffset;\n\n\t\t\tif( typeof this.Reveal.getConfig().parallaxBackgroundVertical === 'number' ) {\n\t\t\t\tverticalOffsetMultiplier = this.Reveal.getConfig().parallaxBackgroundVertical;\n\t\t\t}\n\t\t\telse {\n\t\t\t\tverticalOffsetMultiplier = ( backgroundHeight - slideHeight ) / ( verticalSlideCount-1 );\n\t\t\t}\n\n\t\t\tverticalOffset = verticalSlideCount > 0 ? verticalOffsetMultiplier * indices.v : 0;\n\n\t\t\tthis.element.style.backgroundPosition = horizontalOffset + 'px ' + -verticalOffset + 'px';\n\n\t\t}\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}\n","import { queryAll, extend, createStyleSheet, matches, closest } from '../utils/util.js'\nimport { FRAGMENT_STYLE_REGEX } from '../utils/constants.js'\n\n// Counter used to generate unique IDs for auto-animated elements\nlet autoAnimateCounter = 0;\n\n/**\n * Automatically animates matching elements across\n * slides with the [data-auto-animate] attribute.\n */\nexport default class AutoAnimate {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\t/**\n\t * Runs an auto-animation between the given slides.\n\t *\n\t * @param {HTMLElement} fromSlide\n\t * @param {HTMLElement} toSlide\n\t */\n\trun( fromSlide, toSlide ) {\n\n\t\t// Clean up after prior animations\n\t\tthis.reset();\n\n\t\tlet allSlides = this.Reveal.getSlides();\n\t\tlet toSlideIndex = allSlides.indexOf( toSlide );\n\t\tlet fromSlideIndex = allSlides.indexOf( fromSlide );\n\n\t\t// Ensure that;\n\t\t// 1. Both slides exist.\n\t\t// 2. Both slides are auto-animate targets with the same\n\t\t// data-auto-animate-id value (including null if absent on both).\n\t\t// 3. data-auto-animate-restart isn't set on the physically latter\n\t\t// slide (independent of slide direction).\n\t\tif( fromSlide && toSlide && fromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' )\n\t\t\t\t&& fromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) \n\t\t\t\t&& !( toSlideIndex > fromSlideIndex ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' ) ) {\n\n\t\t\t// Create a new auto-animate sheet\n\t\t\tthis.autoAnimateStyleSheet = this.autoAnimateStyleSheet || createStyleSheet();\n\n\t\t\tlet animationOptions = this.getAutoAnimateOptions( toSlide );\n\n\t\t\t// Set our starting state\n\t\t\tfromSlide.dataset.autoAnimate = 'pending';\n\t\t\ttoSlide.dataset.autoAnimate = 'pending';\n\n\t\t\t// Flag the navigation direction, needed for fragment buildup\n\t\t\tanimationOptions.slideDirection = toSlideIndex > fromSlideIndex ? 'forward' : 'backward';\n\n\t\t\t// If the from-slide is hidden because it has moved outside\n\t\t\t// the view distance, we need to temporarily show it while\n\t\t\t// measuring\n\t\t\tlet fromSlideIsHidden = fromSlide.style.display === 'none';\n\t\t\tif( fromSlideIsHidden ) fromSlide.style.display = this.Reveal.getConfig().display;\n\n\t\t\t// Inject our auto-animate styles for this transition\n\t\t\tlet css = this.getAutoAnimatableElements( fromSlide, toSlide ).map( elements => {\n\t\t\t\treturn this.autoAnimateElements( elements.from, elements.to, elements.options || {}, animationOptions, autoAnimateCounter++ );\n\t\t\t} );\n\n\t\t\tif( fromSlideIsHidden ) fromSlide.style.display = 'none';\n\n\t\t\t// Animate unmatched elements, if enabled\n\t\t\tif( toSlide.dataset.autoAnimateUnmatched !== 'false' && this.Reveal.getConfig().autoAnimateUnmatched === true ) {\n\n\t\t\t\t// Our default timings for unmatched elements\n\t\t\t\tlet defaultUnmatchedDuration = animationOptions.duration * 0.8,\n\t\t\t\t\tdefaultUnmatchedDelay = animationOptions.duration * 0.2;\n\n\t\t\t\tthis.getUnmatchedAutoAnimateElements( toSlide ).forEach( unmatchedElement => {\n\n\t\t\t\t\tlet unmatchedOptions = this.getAutoAnimateOptions( unmatchedElement, animationOptions );\n\t\t\t\t\tlet id = 'unmatched';\n\n\t\t\t\t\t// If there is a duration or delay set specifically for this\n\t\t\t\t\t// element our unmatched elements should adhere to those\n\t\t\t\t\tif( unmatchedOptions.duration !== animationOptions.duration || unmatchedOptions.delay !== animationOptions.delay ) {\n\t\t\t\t\t\tid = 'unmatched-' + autoAnimateCounter++;\n\t\t\t\t\t\tcss.push( `[data-auto-animate=\"running\"] [data-auto-animate-target=\"${id}\"] { transition: opacity ${unmatchedOptions.duration}s ease ${unmatchedOptions.delay}s; }` );\n\t\t\t\t\t}\n\n\t\t\t\t\tunmatchedElement.dataset.autoAnimateTarget = id;\n\n\t\t\t\t}, this );\n\n\t\t\t\t// Our default transition for unmatched elements\n\t\t\t\tcss.push( `[data-auto-animate=\"running\"] [data-auto-animate-target=\"unmatched\"] { transition: opacity ${defaultUnmatchedDuration}s ease ${defaultUnmatchedDelay}s; }` );\n\n\t\t\t}\n\n\t\t\t// Setting the whole chunk of CSS at once is the most\n\t\t\t// efficient way to do this. Using sheet.insertRule\n\t\t\t// is multiple factors slower.\n\t\t\tthis.autoAnimateStyleSheet.innerHTML = css.join( '' );\n\n\t\t\t// Start the animation next cycle\n\t\t\trequestAnimationFrame( () => {\n\t\t\t\tif( this.autoAnimateStyleSheet ) {\n\t\t\t\t\t// This forces our newly injected styles to be applied in Firefox\n\t\t\t\t\tgetComputedStyle( this.autoAnimateStyleSheet ).fontWeight;\n\n\t\t\t\t\ttoSlide.dataset.autoAnimate = 'running';\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'autoanimate',\n\t\t\t\tdata: {\n\t\t\t\t\tfromSlide,\n\t\t\t\t\ttoSlide,\n\t\t\t\t\tsheet: this.autoAnimateStyleSheet\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Rolls back all changes that we've made to the DOM so\n\t * that as part of animating.\n\t */\n\treset() {\n\n\t\t// Reset slides\n\t\tqueryAll( this.Reveal.getRevealElement(), '[data-auto-animate]:not([data-auto-animate=\"\"])' ).forEach( element => {\n\t\t\telement.dataset.autoAnimate = '';\n\t\t} );\n\n\t\t// Reset elements\n\t\tqueryAll( this.Reveal.getRevealElement(), '[data-auto-animate-target]' ).forEach( element => {\n\t\t\tdelete element.dataset.autoAnimateTarget;\n\t\t} );\n\n\t\t// Remove the animation sheet\n\t\tif( this.autoAnimateStyleSheet && this.autoAnimateStyleSheet.parentNode ) {\n\t\t\tthis.autoAnimateStyleSheet.parentNode.removeChild( this.autoAnimateStyleSheet );\n\t\t\tthis.autoAnimateStyleSheet = null;\n\t\t}\n\n\t}\n\n\t/**\n\t * Creates a FLIP animation where the `to` element starts out\n\t * in the `from` element position and animates to its original\n\t * state.\n\t *\n\t * @param {HTMLElement} from\n\t * @param {HTMLElement} to\n\t * @param {Object} elementOptions Options for this element pair\n\t * @param {Object} animationOptions Options set at the slide level\n\t * @param {String} id Unique ID that we can use to identify this\n\t * auto-animate element in the DOM\n\t */\n\tautoAnimateElements( from, to, elementOptions, animationOptions, id ) {\n\n\t\t// 'from' elements are given a data-auto-animate-target with no value,\n\t\t// 'to' elements are are given a data-auto-animate-target with an ID\n\t\tfrom.dataset.autoAnimateTarget = '';\n\t\tto.dataset.autoAnimateTarget = id;\n\n\t\t// Each element may override any of the auto-animate options\n\t\t// like transition easing, duration and delay via data-attributes\n\t\tlet options = this.getAutoAnimateOptions( to, animationOptions );\n\n\t\t// If we're using a custom element matcher the element options\n\t\t// may contain additional transition overrides\n\t\tif( typeof elementOptions.delay !== 'undefined' ) options.delay = elementOptions.delay;\n\t\tif( typeof elementOptions.duration !== 'undefined' ) options.duration = elementOptions.duration;\n\t\tif( typeof elementOptions.easing !== 'undefined' ) options.easing = elementOptions.easing;\n\n\t\tlet fromProps = this.getAutoAnimatableProperties( 'from', from, elementOptions ),\n\t\t\ttoProps = this.getAutoAnimatableProperties( 'to', to, elementOptions );\n\n\t\t// Maintain fragment visibility for matching elements when\n\t\t// we're navigating forwards, this way the viewer won't need\n\t\t// to step through the same fragments twice\n\t\tif( to.classList.contains( 'fragment' ) ) {\n\n\t\t\t// Don't auto-animate the opacity of fragments to avoid\n\t\t\t// conflicts with fragment animations\n\t\t\tdelete toProps.styles['opacity'];\n\n\t\t\tif( from.classList.contains( 'fragment' ) ) {\n\n\t\t\t\tlet fromFragmentStyle = ( from.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];\n\t\t\t\tlet toFragmentStyle = ( to.className.match( FRAGMENT_STYLE_REGEX ) || [''] )[0];\n\n\t\t\t\t// Only skip the fragment if the fragment animation style\n\t\t\t\t// remains unchanged\n\t\t\t\tif( fromFragmentStyle === toFragmentStyle && animationOptions.slideDirection === 'forward' ) {\n\t\t\t\t\tto.classList.add( 'visible', 'disabled' );\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// If translation and/or scaling are enabled, css transform\n\t\t// the 'to' element so that it matches the position and size\n\t\t// of the 'from' element\n\t\tif( elementOptions.translate !== false || elementOptions.scale !== false ) {\n\n\t\t\tlet presentationScale = this.Reveal.getScale();\n\n\t\t\tlet delta = {\n\t\t\t\tx: ( fromProps.x - toProps.x ) / presentationScale,\n\t\t\t\ty: ( fromProps.y - toProps.y ) / presentationScale,\n\t\t\t\tscaleX: fromProps.width / toProps.width,\n\t\t\t\tscaleY: fromProps.height / toProps.height\n\t\t\t};\n\n\t\t\t// Limit decimal points to avoid 0.0001px blur and stutter\n\t\t\tdelta.x = Math.round( delta.x * 1000 ) / 1000;\n\t\t\tdelta.y = Math.round( delta.y * 1000 ) / 1000;\n\t\t\tdelta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;\n\t\t\tdelta.scaleX = Math.round( delta.scaleX * 1000 ) / 1000;\n\n\t\t\tlet translate = elementOptions.translate !== false && ( delta.x !== 0 || delta.y !== 0 ),\n\t\t\t\tscale = elementOptions.scale !== false && ( delta.scaleX !== 0 || delta.scaleY !== 0 );\n\n\t\t\t// No need to transform if nothing's changed\n\t\t\tif( translate || scale ) {\n\n\t\t\t\tlet transform = [];\n\n\t\t\t\tif( translate ) transform.push( `translate(${delta.x}px, ${delta.y}px)` );\n\t\t\t\tif( scale ) transform.push( `scale(${delta.scaleX}, ${delta.scaleY})` );\n\n\t\t\t\tfromProps.styles['transform'] = transform.join( ' ' );\n\t\t\t\tfromProps.styles['transform-origin'] = 'top left';\n\n\t\t\t\ttoProps.styles['transform'] = 'none';\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Delete all unchanged 'to' styles\n\t\tfor( let propertyName in toProps.styles ) {\n\t\t\tconst toValue = toProps.styles[propertyName];\n\t\t\tconst fromValue = fromProps.styles[propertyName];\n\n\t\t\tif( toValue === fromValue ) {\n\t\t\t\tdelete toProps.styles[propertyName];\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// If these property values were set via a custom matcher providing\n\t\t\t\t// an explicit 'from' and/or 'to' value, we always inject those values.\n\t\t\t\tif( toValue.explicitValue === true ) {\n\t\t\t\t\ttoProps.styles[propertyName] = toValue.value;\n\t\t\t\t}\n\n\t\t\t\tif( fromValue.explicitValue === true ) {\n\t\t\t\t\tfromProps.styles[propertyName] = fromValue.value;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tlet css = '';\n\n\t\tlet toStyleProperties = Object.keys( toProps.styles );\n\n\t\t// Only create animate this element IF at least one style\n\t\t// property has changed\n\t\tif( toStyleProperties.length > 0 ) {\n\n\t\t\t// Instantly move to the 'from' state\n\t\t\tfromProps.styles['transition'] = 'none';\n\n\t\t\t// Animate towards the 'to' state\n\t\t\ttoProps.styles['transition'] = `all ${options.duration}s ${options.easing} ${options.delay}s`;\n\t\t\ttoProps.styles['transition-property'] = toStyleProperties.join( ', ' );\n\t\t\ttoProps.styles['will-change'] = toStyleProperties.join( ', ' );\n\n\t\t\t// Build up our custom CSS. We need to override inline styles\n\t\t\t// so we need to make our styles vErY IMPORTANT!1!!\n\t\t\tlet fromCSS = Object.keys( fromProps.styles ).map( propertyName => {\n\t\t\t\treturn propertyName + ': ' + fromProps.styles[propertyName] + ' !important;';\n\t\t\t} ).join( '' );\n\n\t\t\tlet toCSS = Object.keys( toProps.styles ).map( propertyName => {\n\t\t\t\treturn propertyName + ': ' + toProps.styles[propertyName] + ' !important;';\n\t\t\t} ).join( '' );\n\n\t\t\tcss = \t'[data-auto-animate-target=\"'+ id +'\"] {'+ fromCSS +'}' +\n\t\t\t\t\t'[data-auto-animate=\"running\"] [data-auto-animate-target=\"'+ id +'\"] {'+ toCSS +'}';\n\n\t\t}\n\n\t\treturn css;\n\n\t}\n\n\t/**\n\t * Returns the auto-animate options for the given element.\n\t *\n\t * @param {HTMLElement} element Element to pick up options\n\t * from, either a slide or an animation target\n\t * @param {Object} [inheritedOptions] Optional set of existing\n\t * options\n\t */\n\tgetAutoAnimateOptions( element, inheritedOptions ) {\n\n\t\tlet options = {\n\t\t\teasing: this.Reveal.getConfig().autoAnimateEasing,\n\t\t\tduration: this.Reveal.getConfig().autoAnimateDuration,\n\t\t\tdelay: 0\n\t\t};\n\n\t\toptions = extend( options, inheritedOptions );\n\n\t\t// Inherit options from parent elements\n\t\tif( element.parentNode ) {\n\t\t\tlet autoAnimatedParent = closest( element.parentNode, '[data-auto-animate-target]' );\n\t\t\tif( autoAnimatedParent ) {\n\t\t\t\toptions = this.getAutoAnimateOptions( autoAnimatedParent, options );\n\t\t\t}\n\t\t}\n\n\t\tif( element.dataset.autoAnimateEasing ) {\n\t\t\toptions.easing = element.dataset.autoAnimateEasing;\n\t\t}\n\n\t\tif( element.dataset.autoAnimateDuration ) {\n\t\t\toptions.duration = parseFloat( element.dataset.autoAnimateDuration );\n\t\t}\n\n\t\tif( element.dataset.autoAnimateDelay ) {\n\t\t\toptions.delay = parseFloat( element.dataset.autoAnimateDelay );\n\t\t}\n\n\t\treturn options;\n\n\t}\n\n\t/**\n\t * Returns an object containing all of the properties\n\t * that can be auto-animated for the given element and\n\t * their current computed values.\n\t *\n\t * @param {String} direction 'from' or 'to'\n\t */\n\tgetAutoAnimatableProperties( direction, element, elementOptions ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\n\t\tlet properties = { styles: [] };\n\n\t\t// Position and size\n\t\tif( elementOptions.translate !== false || elementOptions.scale !== false ) {\n\t\t\tlet bounds;\n\n\t\t\t// Custom auto-animate may optionally return a custom tailored\n\t\t\t// measurement function\n\t\t\tif( typeof elementOptions.measure === 'function' ) {\n\t\t\t\tbounds = elementOptions.measure( element );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tif( config.center ) {\n\t\t\t\t\t// More precise, but breaks when used in combination\n\t\t\t\t\t// with zoom for scaling the deck ¯\\_(ツ)_/¯\n\t\t\t\t\tbounds = element.getBoundingClientRect();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tlet scale = this.Reveal.getScale();\n\t\t\t\t\tbounds = {\n\t\t\t\t\t\tx: element.offsetLeft * scale,\n\t\t\t\t\t\ty: element.offsetTop * scale,\n\t\t\t\t\t\twidth: element.offsetWidth * scale,\n\t\t\t\t\t\theight: element.offsetHeight * scale\n\t\t\t\t\t};\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tproperties.x = bounds.x;\n\t\t\tproperties.y = bounds.y;\n\t\t\tproperties.width = bounds.width;\n\t\t\tproperties.height = bounds.height;\n\t\t}\n\n\t\tconst computedStyles = getComputedStyle( element );\n\n\t\t// CSS styles\n\t\t( elementOptions.styles || config.autoAnimateStyles ).forEach( style => {\n\t\t\tlet value;\n\n\t\t\t// `style` is either the property name directly, or an object\n\t\t\t// definition of a style property\n\t\t\tif( typeof style === 'string' ) style = { property: style };\n\n\t\t\tif( typeof style.from !== 'undefined' && direction === 'from' ) {\n\t\t\t\tvalue = { value: style.from, explicitValue: true };\n\t\t\t}\n\t\t\telse if( typeof style.to !== 'undefined' && direction === 'to' ) {\n\t\t\t\tvalue = { value: style.to, explicitValue: true };\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// Use a unitless value for line-height so that it inherits properly\n\t\t\t\tif( style.property === 'line-height' ) {\n\t\t\t\t\tvalue = parseFloat( computedStyles['line-height'] ) / parseFloat( computedStyles['font-size'] );\n\t\t\t\t}\n\n\t\t\t\tif( isNaN(value) ) {\n\t\t\t\t\tvalue = computedStyles[style.property];\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif( value !== '' ) {\n\t\t\t\tproperties.styles[style.property] = value;\n\t\t\t}\n\t\t} );\n\n\t\treturn properties;\n\n\t}\n\n\t/**\n\t * Get a list of all element pairs that we can animate\n\t * between the given slides.\n\t *\n\t * @param {HTMLElement} fromSlide\n\t * @param {HTMLElement} toSlide\n\t *\n\t * @return {Array} Each value is an array where [0] is\n\t * the element we're animating from and [1] is the\n\t * element we're animating to\n\t */\n\tgetAutoAnimatableElements( fromSlide, toSlide ) {\n\n\t\tlet matcher = typeof this.Reveal.getConfig().autoAnimateMatcher === 'function' ? this.Reveal.getConfig().autoAnimateMatcher : this.getAutoAnimatePairs;\n\n\t\tlet pairs = matcher.call( this, fromSlide, toSlide );\n\n\t\tlet reserved = [];\n\n\t\t// Remove duplicate pairs\n\t\treturn pairs.filter( ( pair, index ) => {\n\t\t\tif( reserved.indexOf( pair.to ) === -1 ) {\n\t\t\t\treserved.push( pair.to );\n\t\t\t\treturn true;\n\t\t\t}\n\t\t} );\n\n\t}\n\n\t/**\n\t * Identifies matching elements between slides.\n\t *\n\t * You can specify a custom matcher function by using\n\t * the `autoAnimateMatcher` config option.\n\t */\n\tgetAutoAnimatePairs( fromSlide, toSlide ) {\n\n\t\tlet pairs = [];\n\n\t\tconst codeNodes = 'pre';\n\t\tconst textNodes = 'h1, h2, h3, h4, h5, h6, p, li';\n\t\tconst mediaNodes = 'img, video, iframe';\n\n\t\t// Explicit matches via data-id\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, '[data-id]', node => {\n\t\t\treturn node.nodeName + ':::' + node.getAttribute( 'data-id' );\n\t\t} );\n\n\t\t// Text\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, textNodes, node => {\n\t\t\treturn node.nodeName + ':::' + node.innerText;\n\t\t} );\n\n\t\t// Media\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, mediaNodes, node => {\n\t\t\treturn node.nodeName + ':::' + ( node.getAttribute( 'src' ) || node.getAttribute( 'data-src' ) );\n\t\t} );\n\n\t\t// Code\n\t\tthis.findAutoAnimateMatches( pairs, fromSlide, toSlide, codeNodes, node => {\n\t\t\treturn node.nodeName + ':::' + node.innerText;\n\t\t} );\n\n\t\tpairs.forEach( pair => {\n\t\t\t// Disable scale transformations on text nodes, we transition\n\t\t\t// each individual text property instead\n\t\t\tif( matches( pair.from, textNodes ) ) {\n\t\t\t\tpair.options = { scale: false };\n\t\t\t}\n\t\t\t// Animate individual lines of code\n\t\t\telse if( matches( pair.from, codeNodes ) ) {\n\n\t\t\t\t// Transition the code block's width and height instead of scaling\n\t\t\t\t// to prevent its content from being squished\n\t\t\t\tpair.options = { scale: false, styles: [ 'width', 'height' ] };\n\n\t\t\t\t// Lines of code\n\t\t\t\tthis.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-code', node => {\n\t\t\t\t\treturn node.textContent;\n\t\t\t\t}, {\n\t\t\t\t\tscale: false,\n\t\t\t\t\tstyles: [],\n\t\t\t\t\tmeasure: this.getLocalBoundingBox.bind( this )\n\t\t\t\t} );\n\n\t\t\t\t// Line numbers\n\t\t\t\tthis.findAutoAnimateMatches( pairs, pair.from, pair.to, '.hljs .hljs-ln-numbers[data-line-number]', node => {\n\t\t\t\t\treturn node.getAttribute( 'data-line-number' );\n\t\t\t\t}, {\n\t\t\t\t\tscale: false,\n\t\t\t\t\tstyles: [ 'width' ],\n\t\t\t\t\tmeasure: this.getLocalBoundingBox.bind( this )\n\t\t\t\t} );\n\n\t\t\t}\n\n\t\t}, this );\n\n\t\treturn pairs;\n\n\t}\n\n\t/**\n\t * Helper method which returns a bounding box based on\n\t * the given elements offset coordinates.\n\t *\n\t * @param {HTMLElement} element\n\t * @return {Object} x, y, width, height\n\t */\n\tgetLocalBoundingBox( element ) {\n\n\t\tconst presentationScale = this.Reveal.getScale();\n\n\t\treturn {\n\t\t\tx: Math.round( ( element.offsetLeft * presentationScale ) * 100 ) / 100,\n\t\t\ty: Math.round( ( element.offsetTop * presentationScale ) * 100 ) / 100,\n\t\t\twidth: Math.round( ( element.offsetWidth * presentationScale ) * 100 ) / 100,\n\t\t\theight: Math.round( ( element.offsetHeight * presentationScale ) * 100 ) / 100\n\t\t};\n\n\t}\n\n\t/**\n\t * Finds matching elements between two slides.\n\t *\n\t * @param {Array} pairs \tList of pairs to push matches to\n\t * @param {HTMLElement} fromScope Scope within the from element exists\n\t * @param {HTMLElement} toScope Scope within the to element exists\n\t * @param {String} selector CSS selector of the element to match\n\t * @param {Function} serializer A function that accepts an element and returns\n\t * a stringified ID based on its contents\n\t * @param {Object} animationOptions Optional config options for this pair\n\t */\n\tfindAutoAnimateMatches( pairs, fromScope, toScope, selector, serializer, animationOptions ) {\n\n\t\tlet fromMatches = {};\n\t\tlet toMatches = {};\n\n\t\t[].slice.call( fromScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {\n\t\t\tconst key = serializer( element );\n\t\t\tif( typeof key === 'string' && key.length ) {\n\t\t\t\tfromMatches[key] = fromMatches[key] || [];\n\t\t\t\tfromMatches[key].push( element );\n\t\t\t}\n\t\t} );\n\n\t\t[].slice.call( toScope.querySelectorAll( selector ) ).forEach( ( element, i ) => {\n\t\t\tconst key = serializer( element );\n\t\t\ttoMatches[key] = toMatches[key] || [];\n\t\t\ttoMatches[key].push( element );\n\n\t\t\tlet fromElement;\n\n\t\t\t// Retrieve the 'from' element\n\t\t\tif( fromMatches[key] ) {\n\t\t\t\tconst primaryIndex = toMatches[key].length - 1;\n\t\t\t\tconst secondaryIndex = fromMatches[key].length - 1;\n\n\t\t\t\t// If there are multiple identical from elements, retrieve\n\t\t\t\t// the one at the same index as our to-element.\n\t\t\t\tif( fromMatches[key][ primaryIndex ] ) {\n\t\t\t\t\tfromElement = fromMatches[key][ primaryIndex ];\n\t\t\t\t\tfromMatches[key][ primaryIndex ] = null;\n\t\t\t\t}\n\t\t\t\t// If there are no matching from-elements at the same index,\n\t\t\t\t// use the last one.\n\t\t\t\telse if( fromMatches[key][ secondaryIndex ] ) {\n\t\t\t\t\tfromElement = fromMatches[key][ secondaryIndex ];\n\t\t\t\t\tfromMatches[key][ secondaryIndex ] = null;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// If we've got a matching pair, push it to the list of pairs\n\t\t\tif( fromElement ) {\n\t\t\t\tpairs.push({\n\t\t\t\t\tfrom: fromElement,\n\t\t\t\t\tto: element,\n\t\t\t\t\toptions: animationOptions\n\t\t\t\t});\n\t\t\t}\n\t\t} );\n\n\t}\n\n\t/**\n\t * Returns a all elements within the given scope that should\n\t * be considered unmatched in an auto-animate transition. If\n\t * fading of unmatched elements is turned on, these elements\n\t * will fade when going between auto-animate slides.\n\t *\n\t * Note that parents of auto-animate targets are NOT considered\n\t * unmatched since fading them would break the auto-animation.\n\t *\n\t * @param {HTMLElement} rootElement\n\t * @return {Array}\n\t */\n\tgetUnmatchedAutoAnimateElements( rootElement ) {\n\n\t\treturn [].slice.call( rootElement.children ).reduce( ( result, element ) => {\n\n\t\t\tconst containsAnimatedElements = element.querySelector( '[data-auto-animate-target]' );\n\n\t\t\t// The element is unmatched if\n\t\t\t// - It is not an auto-animate target\n\t\t\t// - It does not contain any auto-animate targets\n\t\t\tif( !element.hasAttribute( 'data-auto-animate-target' ) && !containsAnimatedElements ) {\n\t\t\t\tresult.push( element );\n\t\t\t}\n\n\t\t\tif( element.querySelector( '[data-auto-animate-target]' ) ) {\n\t\t\t\tresult = result.concat( this.getUnmatchedAutoAnimateElements( element ) );\n\t\t\t}\n\n\t\t\treturn result;\n\n\t\t}, [] );\n\n\t}\n\n}\n","import { HORIZONTAL_SLIDES_SELECTOR, HORIZONTAL_BACKGROUNDS_SELECTOR } from '../utils/constants.js'\nimport { queryAll } from '../utils/util.js'\n\nconst HIDE_SCROLLBAR_TIMEOUT = 500;\nconst MAX_PROGRESS_SPACING = 4;\nconst MIN_PROGRESS_SEGMENT_HEIGHT = 6;\nconst MIN_PLAYHEAD_HEIGHT = 8;\n\n/**\n * The scroll view lets you read a reveal.js presentation\n * as a linear scrollable page.\n */\nexport default class ScrollView {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.active = false;\n\t\tthis.activatedCallbacks = [];\n\n\t\tthis.onScroll = this.onScroll.bind( this );\n\n\t}\n\n\t/**\n\t * Activates the scroll view. This rearranges the presentation DOM\n\t * by—among other things—wrapping each slide in a page element.\n\t */\n\tactivate() {\n\n\t\tif( this.active ) return;\n\n\t\tconst stateBeforeActivation = this.Reveal.getState();\n\n\t\tthis.active = true;\n\n\t\t// Store the full presentation HTML so that we can restore it\n\t\t// when/if the scroll view is deactivated\n\t\tthis.slideHTMLBeforeActivation = this.Reveal.getSlidesElement().innerHTML;\n\n\t\tconst horizontalSlides = queryAll( this.Reveal.getRevealElement(), HORIZONTAL_SLIDES_SELECTOR );\n\t\tconst horizontalBackgrounds = queryAll( this.Reveal.getRevealElement(), HORIZONTAL_BACKGROUNDS_SELECTOR );\n\n\t\tthis.viewportElement.classList.add( 'loading-scroll-mode', 'reveal-scroll' );\n\n\t\tlet presentationBackground;\n\n\t\tconst viewportStyles = window.getComputedStyle( this.viewportElement );\n\t\tif( viewportStyles && viewportStyles.background ) {\n\t\t\tpresentationBackground = viewportStyles.background;\n\t\t}\n\n\t\tconst pageElements = [];\n\t\tconst pageContainer = horizontalSlides[0].parentNode;\n\n\t\tlet previousSlide;\n\n\t\t// Creates a new page element and appends the given slide/bg\n\t\t// to it.\n\t\tconst createPageElement = ( slide, h, v, isVertical ) => {\n\n\t\t\tlet contentContainer;\n\n\t\t\t// If this slide is part of an auto-animation sequence, we\n\t\t\t// group it under the same page element as the previous slide\n\t\t\tif( previousSlide && this.Reveal.shouldAutoAnimateBetween( previousSlide, slide ) ) {\n\t\t\t\tcontentContainer = document.createElement( 'div' );\n\t\t\t\tcontentContainer.className = 'scroll-page-content scroll-auto-animate-page';\n\t\t\t\tcontentContainer.style.display = 'none';\n\t\t\t\tpreviousSlide.closest( '.scroll-page-content' ).parentNode.appendChild( contentContainer );\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// Wrap the slide in a page element and hide its overflow\n\t\t\t\t// so that no page ever flows onto another\n\t\t\t\tconst page = document.createElement( 'div' );\n\t\t\t\tpage.className = 'scroll-page';\n\t\t\t\tpageElements.push( page );\n\n\t\t\t\t// This transfers over the background of the vertical stack containing\n\t\t\t\t// the slide if it exists. Otherwise, it uses the presentation-wide\n\t\t\t\t// background.\n\t\t\t\tif( isVertical && horizontalBackgrounds.length > h ) {\n\t\t\t\t\tconst slideBackground = horizontalBackgrounds[h];\n\t\t\t\t\tconst pageBackground = window.getComputedStyle( slideBackground );\n\n\t\t\t\t\tif( pageBackground && pageBackground.background ) {\n\t\t\t\t\t\tpage.style.background = pageBackground.background;\n\t\t\t\t\t}\n\t\t\t\t\telse if( presentationBackground ) {\n\t\t\t\t\t\tpage.style.background = presentationBackground;\n\t\t\t\t\t}\n\t\t\t\t} else if( presentationBackground ) {\n\t\t\t\t\tpage.style.background = presentationBackground;\n\t\t\t\t}\n\n\t\t\t\tconst stickyContainer = document.createElement( 'div' );\n\t\t\t\tstickyContainer.className = 'scroll-page-sticky';\n\t\t\t\tpage.appendChild( stickyContainer );\n\n\t\t\t\tcontentContainer = document.createElement( 'div' );\n\t\t\t\tcontentContainer.className = 'scroll-page-content';\n\t\t\t\tstickyContainer.appendChild( contentContainer );\n\t\t\t}\n\n\t\t\tcontentContainer.appendChild( slide );\n\n\t\t\tslide.classList.remove( 'past', 'future' );\n\t\t\tslide.setAttribute( 'data-index-h', h );\n\t\t\tslide.setAttribute( 'data-index-v', v );\n\n\t\t\tif( slide.slideBackgroundElement ) {\n\t\t\t\tslide.slideBackgroundElement.remove( 'past', 'future' );\n\t\t\t\tcontentContainer.insertBefore( slide.slideBackgroundElement, slide );\n\t\t\t}\n\n\t\t\tpreviousSlide = slide;\n\n\t\t}\n\n\t\t// Slide and slide background layout\n\t\thorizontalSlides.forEach( ( horizontalSlide, h ) => {\n\n\t\t\tif( this.Reveal.isVerticalStack( horizontalSlide ) ) {\n\t\t\t\thorizontalSlide.querySelectorAll( 'section' ).forEach( ( verticalSlide, v ) => {\n\t\t\t\t\tcreatePageElement( verticalSlide, h, v, true );\n\t\t\t\t});\n\t\t\t}\n\t\t\telse {\n\t\t\t\tcreatePageElement( horizontalSlide, h, 0 );\n\t\t\t}\n\n\t\t}, this );\n\n\t\tthis.createProgressBar();\n\n\t\t// Remove leftover stacks\n\t\tqueryAll( this.Reveal.getRevealElement(), '.stack' ).forEach( stack => stack.remove() );\n\n\t\t// Add our newly created pages to the DOM\n\t\tpageElements.forEach( page => pageContainer.appendChild( page ) );\n\n\t\t// Re-run JS-based content layout after the slide is added to page DOM\n\t\tthis.Reveal.slideContent.layout( this.Reveal.getSlidesElement() );\n\n\t\tthis.Reveal.layout();\n\t\tthis.Reveal.setState( stateBeforeActivation );\n\n\t\tthis.activatedCallbacks.forEach( callback => callback() );\n\t\tthis.activatedCallbacks = [];\n\n\t\tthis.restoreScrollPosition();\n\n\t\tthis.viewportElement.classList.remove( 'loading-scroll-mode' );\n\t\tthis.viewportElement.addEventListener( 'scroll', this.onScroll, { passive: true } );\n\n\t}\n\n\t/**\n\t * Deactivates the scroll view and restores the standard slide-based\n\t * presentation.\n\t */\n\tdeactivate() {\n\n\t\tif( !this.active ) return;\n\n\t\tconst stateBeforeDeactivation = this.Reveal.getState();\n\n\t\tthis.active = false;\n\n\t\tthis.viewportElement.removeEventListener( 'scroll', this.onScroll );\n\t\tthis.viewportElement.classList.remove( 'reveal-scroll' );\n\n\t\tthis.removeProgressBar();\n\n\t\tthis.Reveal.getSlidesElement().innerHTML = this.slideHTMLBeforeActivation;\n\t\tthis.Reveal.sync();\n\t\tthis.Reveal.setState( stateBeforeDeactivation );\n\n\t\tthis.slideHTMLBeforeActivation = null;\n\n\t}\n\n\ttoggle( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? this.activate() : this.deactivate();\n\t\t}\n\t\telse {\n\t\t\tthis.isActive() ? this.deactivate() : this.activate();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if the scroll view is currently active.\n\t */\n\tisActive() {\n\n\t\treturn this.active;\n\n\t}\n\n\t/**\n\t * Renders the progress bar component.\n\t */\n\tcreateProgressBar() {\n\n\t\tthis.progressBar = document.createElement( 'div' );\n\t\tthis.progressBar.className = 'scrollbar';\n\n\t\tthis.progressBarInner = document.createElement( 'div' );\n\t\tthis.progressBarInner.className = 'scrollbar-inner';\n\t\tthis.progressBar.appendChild( this.progressBarInner );\n\n\t\tthis.progressBarPlayhead = document.createElement( 'div' );\n\t\tthis.progressBarPlayhead.className = 'scrollbar-playhead';\n\t\tthis.progressBarInner.appendChild( this.progressBarPlayhead );\n\n\t\tthis.viewportElement.insertBefore( this.progressBar, this.viewportElement.firstChild );\n\n\t\tconst handleDocumentMouseMove\t= ( event ) => {\n\n\t\t\tlet progress = ( event.clientY - this.progressBarInner.getBoundingClientRect().top ) / this.progressBarHeight;\n\t\t\tprogress = Math.max( Math.min( progress, 1 ), 0 );\n\n\t\t\tthis.viewportElement.scrollTop = progress * ( this.viewportElement.scrollHeight - this.viewportElement.offsetHeight );\n\n\t\t};\n\n\t\tconst handleDocumentMouseUp = ( event ) => {\n\n\t\t\tthis.draggingProgressBar = false;\n\t\t\tthis.showProgressBar();\n\n\t\t\tdocument.removeEventListener( 'mousemove', handleDocumentMouseMove );\n\t\t\tdocument.removeEventListener( 'mouseup', handleDocumentMouseUp );\n\n\t\t};\n\n\t\tconst handleMouseDown = ( event ) => {\n\n\t\t\tevent.preventDefault();\n\n\t\t\tthis.draggingProgressBar = true;\n\n\t\t\tdocument.addEventListener( 'mousemove', handleDocumentMouseMove );\n\t\t\tdocument.addEventListener( 'mouseup', handleDocumentMouseUp );\n\n\t\t\thandleDocumentMouseMove( event );\n\n\t\t};\n\n\t\tthis.progressBarInner.addEventListener( 'mousedown', handleMouseDown );\n\n\t}\n\n\tremoveProgressBar() {\n\n\t\tif( this.progressBar ) {\n\t\t\tthis.progressBar.remove();\n\t\t\tthis.progressBar = null;\n\t\t}\n\n\t}\n\n\tlayout() {\n\n\t\tif( this.isActive() ) {\n\t\t\tthis.syncPages();\n\t\t\tthis.syncScrollPosition();\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates our pages to match the latest configuration and\n\t * presentation size.\n\t */\n\tsyncPages() {\n\n\t\tconst config = this.Reveal.getConfig();\n\n\t\tconst slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );\n\t\tconst scale = this.Reveal.getScale();\n\t\tconst useCompactLayout = config.scrollLayout === 'compact';\n\n\t\tconst viewportHeight = this.viewportElement.offsetHeight;\n\t\tconst compactHeight = slideSize.height * scale;\n\t\tconst pageHeight = useCompactLayout ? compactHeight : viewportHeight;\n\n\t\t// The height that needs to be scrolled between scroll triggers\n\t\tthis.scrollTriggerHeight = useCompactLayout ? compactHeight : viewportHeight;\n\n\t\tthis.viewportElement.style.setProperty( '--page-height', pageHeight + 'px' );\n\t\tthis.viewportElement.style.scrollSnapType = typeof config.scrollSnap === 'string' ? `y ${config.scrollSnap}` : '';\n\n\t\t// This will hold all scroll triggers used to show/hide slides\n\t\tthis.slideTriggers = [];\n\n\t\tconst pageElements = Array.from( this.Reveal.getRevealElement().querySelectorAll( '.scroll-page' ) );\n\n\t\tthis.pages = pageElements.map( pageElement => {\n\t\t\tconst page = this.createPage({\n\t\t\t\tpageElement,\n\t\t\t\tslideElement: pageElement.querySelector( 'section' ),\n\t\t\t\tstickyElement: pageElement.querySelector( '.scroll-page-sticky' ),\n\t\t\t\tcontentElement: pageElement.querySelector( '.scroll-page-content' ),\n\t\t\t\tbackgroundElement: pageElement.querySelector( '.slide-background' ),\n\t\t\t\tautoAnimateElements: pageElement.querySelectorAll( '.scroll-auto-animate-page' ),\n\t\t\t\tautoAnimatePages: []\n\t\t\t});\n\n\t\t\tpage.pageElement.style.setProperty( '--slide-height', config.center === true ? 'auto' : slideSize.height + 'px' );\n\n\t\t\tthis.slideTriggers.push({\n\t\t\t\tpage: page,\n\t\t\t\tactivate: () => this.activatePage( page ),\n\t\t\t\tdeactivate: () => this.deactivatePage( page )\n\t\t\t});\n\n\t\t\t// Create scroll triggers that show/hide fragments\n\t\t\tthis.createFragmentTriggersForPage( page );\n\n\t\t\t// Create scroll triggers for triggering auto-animate steps\n\t\t\tif( page.autoAnimateElements.length > 0 ) {\n\t\t\t\tthis.createAutoAnimateTriggersForPage( page );\n\t\t\t}\n\n\t\t\tlet totalScrollTriggerCount = Math.max( page.scrollTriggers.length - 1, 0 );\n\n\t\t\t// Each auto-animate step may include its own scroll triggers\n\t\t\t// for fragments, ensure we count those as well\n\t\t\ttotalScrollTriggerCount += page.autoAnimatePages.reduce( ( total, page ) => {\n\t\t\t\treturn total + Math.max( page.scrollTriggers.length - 1, 0 );\n\t\t\t}, page.autoAnimatePages.length );\n\n\t\t\t// Clean up from previous renders\n\t\t\tpage.pageElement.querySelectorAll( '.scroll-snap-point' ).forEach( el => el.remove() );\n\n\t\t\t// Create snap points for all scroll triggers\n\t\t\t// - Can't be absolute in FF\n\t\t\t// - Can't be 0-height in Safari\n\t\t\t// - Can't use snap-align on parent in Safari because then\n\t\t\t// inner triggers won't work\n\t\t\tfor( let i = 0; i < totalScrollTriggerCount + 1; i++ ) {\n\t\t\t\tconst triggerStick = document.createElement( 'div' );\n\t\t\t\ttriggerStick.className = 'scroll-snap-point';\n\t\t\t\ttriggerStick.style.height = this.scrollTriggerHeight + 'px';\n\t\t\t\ttriggerStick.style.scrollSnapAlign = useCompactLayout ? 'center' : 'start';\n\t\t\t\tpage.pageElement.appendChild( triggerStick );\n\n\t\t\t\tif( i === 0 ) {\n\t\t\t\t\ttriggerStick.style.marginTop = -this.scrollTriggerHeight + 'px';\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// In the compact layout, only slides with scroll triggers cover the\n\t\t\t// full viewport height. This helps avoid empty gaps before or after\n\t\t\t// a sticky slide.\n\t\t\tif( useCompactLayout && page.scrollTriggers.length > 0 ) {\n\t\t\t\tpage.pageHeight = viewportHeight;\n\t\t\t\tpage.pageElement.style.setProperty( '--page-height', viewportHeight + 'px' );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tpage.pageHeight = pageHeight;\n\t\t\t\tpage.pageElement.style.removeProperty( '--page-height' );\n\t\t\t}\n\n\t\t\t// Add scroll padding based on how many scroll triggers we have\n\t\t\tpage.scrollPadding = this.scrollTriggerHeight * totalScrollTriggerCount;\n\n\t\t\t// The total height including scrollable space\n\t\t\tpage.totalHeight = page.pageHeight + page.scrollPadding;\n\n\t\t\t// This is used to pad the height of our page in CSS\n\t\t\tpage.pageElement.style.setProperty( '--page-scroll-padding', page.scrollPadding + 'px' );\n\n\t\t\t// If this is a sticky page, stick it to the vertical center\n\t\t\tif( totalScrollTriggerCount > 0 ) {\n\t\t\t\tpage.stickyElement.style.position = 'sticky';\n\t\t\t\tpage.stickyElement.style.top = Math.max( ( viewportHeight - page.pageHeight ) / 2, 0 ) + 'px';\n\t\t\t}\n\t\t\telse {\n\t\t\t\tpage.stickyElement.style.position = 'relative';\n\t\t\t\tpage.pageElement.style.scrollSnapAlign = page.pageHeight < viewportHeight ? 'center' : 'start';\n\t\t\t}\n\n\t\t\treturn page;\n\t\t} );\n\n\t\tthis.setTriggerRanges();\n\n\t\t/*\n\t\tconsole.log(this.slideTriggers.map( t => {\n\t\t\treturn {\n\t\t\t\trange: `${t.range[0].toFixed(2)}-${t.range[1].toFixed(2)}`,\n\t\t\t\ttriggers: t.page.scrollTriggers.map( t => {\n\t\t\t\t\treturn `${t.range[0].toFixed(2)}-${t.range[1].toFixed(2)}`\n\t\t\t\t}).join( ', ' ),\n\t\t\t}\n\t\t}))\n\t\t*/\n\n\t\tthis.viewportElement.setAttribute( 'data-scrollbar', config.scrollProgress );\n\n\t\tif( config.scrollProgress && this.totalScrollTriggerCount > 1 ) {\n\t\t\t// Create the progress bar if it doesn't already exist\n\t\t\tif( !this.progressBar ) this.createProgressBar();\n\n\t\t\tthis.syncProgressBar();\n\t\t}\n\t\telse {\n\t\t\tthis.removeProgressBar();\n\t\t}\n\n\t}\n\n\t/**\n\t * Calculates and sets the scroll range for all of our scroll\n\t * triggers.\n\t */\n\tsetTriggerRanges() {\n\n\t\t// Calculate the total number of scroll triggers\n\t\tthis.totalScrollTriggerCount = this.slideTriggers.reduce( ( total, trigger ) => {\n\t\t\treturn total + Math.max( trigger.page.scrollTriggers.length, 1 );\n\t\t}, 0 );\n\n\t\tlet rangeStart = 0;\n\n\t\t// Calculate the scroll range of each scroll trigger on a scale\n\t\t// of 0-1\n\t\tthis.slideTriggers.forEach( ( trigger, i ) => {\n\t\t\ttrigger.range = [\n\t\t\t\trangeStart,\n\t\t\t\trangeStart + Math.max( trigger.page.scrollTriggers.length, 1 ) / this.totalScrollTriggerCount\n\t\t\t];\n\n\t\t\tconst scrollTriggerSegmentSize = ( trigger.range[1] - trigger.range[0] ) / trigger.page.scrollTriggers.length;\n\t\t\t// Set the range for each inner scroll trigger\n\t\t\ttrigger.page.scrollTriggers.forEach( ( scrollTrigger, i ) => {\n\t\t\t\tscrollTrigger.range = [\n\t\t\t\t\trangeStart + i * scrollTriggerSegmentSize,\n\t\t\t\t\trangeStart + ( i + 1 ) * scrollTriggerSegmentSize\n\t\t\t\t];\n\t\t\t} );\n\n\t\t\trangeStart = trigger.range[1];\n\t\t} );\n\n\t}\n\n\t/**\n\t * Creates one scroll trigger for each fragments in the given page.\n\t *\n\t * @param {*} page\n\t */\n\tcreateFragmentTriggersForPage( page, slideElement ) {\n\n\t\tslideElement = slideElement || page.slideElement;\n\n\t\t// Each fragment 'group' is an array containing one or more\n\t\t// fragments. Multiple fragments that appear at the same time\n\t\t// are part of the same group.\n\t\tconst fragmentGroups = this.Reveal.fragments.sort( slideElement.querySelectorAll( '.fragment' ), true );\n\n\t\t// Create scroll triggers that show/hide fragments\n\t\tif( fragmentGroups.length ) {\n\t\t\tpage.fragments = this.Reveal.fragments.sort( slideElement.querySelectorAll( '.fragment:not(.disabled)' ) );\n\t\t\tpage.scrollTriggers.push(\n\t\t\t\t// Trigger for the initial state with no fragments visible\n\t\t\t\t{\n\t\t\t\t\tactivate: () => {\n\t\t\t\t\t\tthis.Reveal.fragments.update( -1, page.fragments, slideElement );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t);\n\n\t\t\t// Triggers for each fragment group\n\t\t\tfragmentGroups.forEach( ( fragments, i ) => {\n\t\t\t\tpage.scrollTriggers.push({\n\t\t\t\t\tactivate: () => {\n\t\t\t\t\t\tthis.Reveal.fragments.update( i, page.fragments, slideElement );\n\t\t\t\t\t}\n\t\t\t\t});\n\t\t\t} );\n\t\t}\n\n\n\t\treturn page.scrollTriggers.length;\n\n\t}\n\n\t/**\n\t * Creates scroll triggers for the auto-animate steps in the\n\t * given page.\n\t *\n\t * @param {*} page\n\t */\n\tcreateAutoAnimateTriggersForPage( page ) {\n\n\t\tif( page.autoAnimateElements.length > 0 ) {\n\n\t\t\t// Triggers for each subsequent auto-animate slide\n\t\t\tthis.slideTriggers.push( ...Array.from( page.autoAnimateElements ).map( ( autoAnimateElement, i ) => {\n\t\t\t\tlet autoAnimatePage = this.createPage({\n\t\t\t\t\tslideElement: autoAnimateElement.querySelector( 'section' ),\n\t\t\t\t\tcontentElement: autoAnimateElement,\n\t\t\t\t\tbackgroundElement: autoAnimateElement.querySelector( '.slide-background' )\n\t\t\t\t});\n\n\t\t\t\t// Create fragment scroll triggers for the auto-animate slide\n\t\t\t\tthis.createFragmentTriggersForPage( autoAnimatePage, autoAnimatePage.slideElement );\n\n\t\t\t\tpage.autoAnimatePages.push( autoAnimatePage );\n\n\t\t\t\t// Return our slide trigger\n\t\t\t\treturn {\n\t\t\t\t\tpage: autoAnimatePage,\n\t\t\t\t\tactivate: () => this.activatePage( autoAnimatePage ),\n\t\t\t\t\tdeactivate: () => this.deactivatePage( autoAnimatePage )\n\t\t\t\t};\n\t\t\t}));\n\t\t}\n\n\t}\n\n\t/**\n\t * Helper method for creating a page definition and adding\n\t * required fields. A \"page\" is a slide or auto-animate step.\n\t */\n\tcreatePage( page ) {\n\n\t\tpage.scrollTriggers = [];\n\t\tpage.indexh = parseInt( page.slideElement.getAttribute( 'data-index-h' ), 10 );\n\t\tpage.indexv = parseInt( page.slideElement.getAttribute( 'data-index-v' ), 10 );\n\n\t\treturn page;\n\n\t}\n\n\t/**\n\t * Rerenders progress bar segments so that they match the current\n\t * reveal.js config and size.\n\t */\n\tsyncProgressBar() {\n\n\t\tthis.progressBarInner.querySelectorAll( '.scrollbar-slide' ).forEach( slide => slide.remove() );\n\n\t\tconst scrollHeight = this.viewportElement.scrollHeight;\n\t\tconst viewportHeight = this.viewportElement.offsetHeight;\n\t\tconst viewportHeightFactor = viewportHeight / scrollHeight;\n\n\t\tthis.progressBarHeight = this.progressBarInner.offsetHeight;\n\t\tthis.playheadHeight = Math.max( viewportHeightFactor * this.progressBarHeight, MIN_PLAYHEAD_HEIGHT );\n\t\tthis.progressBarScrollableHeight = this.progressBarHeight - this.playheadHeight;\n\n\t\tconst progressSegmentHeight = viewportHeight / scrollHeight * this.progressBarHeight;\n\t\tconst spacing = Math.min( progressSegmentHeight / 8, MAX_PROGRESS_SPACING );\n\n\t\tthis.progressBarPlayhead.style.height = this.playheadHeight - spacing + 'px';\n\n\t\t// Don't show individual segments if they're too small\n\t\tif( progressSegmentHeight > MIN_PROGRESS_SEGMENT_HEIGHT ) {\n\n\t\t\tthis.slideTriggers.forEach( slideTrigger => {\n\n\t\t\t\tconst { page } = slideTrigger;\n\n\t\t\t\t// Visual representation of a slide\n\t\t\t\tpage.progressBarSlide = document.createElement( 'div' );\n\t\t\t\tpage.progressBarSlide.className = 'scrollbar-slide';\n\t\t\t\tpage.progressBarSlide.style.top = slideTrigger.range[0] * this.progressBarHeight + 'px';\n\t\t\t\tpage.progressBarSlide.style.height = ( slideTrigger.range[1] - slideTrigger.range[0] ) * this.progressBarHeight - spacing + 'px';\n\t\t\t\tpage.progressBarSlide.classList.toggle( 'has-triggers', page.scrollTriggers.length > 0 );\n\t\t\t\tthis.progressBarInner.appendChild( page.progressBarSlide );\n\n\t\t\t\t// Visual representations of each scroll trigger\n\t\t\t\tpage.scrollTriggerElements = page.scrollTriggers.map( ( trigger, i ) => {\n\n\t\t\t\t\tconst triggerElement = document.createElement( 'div' );\n\t\t\t\t\ttriggerElement.className = 'scrollbar-trigger';\n\t\t\t\t\ttriggerElement.style.top = ( trigger.range[0] - slideTrigger.range[0] ) * this.progressBarHeight + 'px';\n\t\t\t\t\ttriggerElement.style.height = ( trigger.range[1] - trigger.range[0] ) * this.progressBarHeight - spacing + 'px';\n\t\t\t\t\tpage.progressBarSlide.appendChild( triggerElement );\n\n\t\t\t\t\tif( i === 0 ) triggerElement.style.display = 'none';\n\n\t\t\t\t\treturn triggerElement;\n\n\t\t\t\t} );\n\n\t\t\t} );\n\n\t\t}\n\t\telse {\n\n\t\t\tthis.pages.forEach( page => page.progressBarSlide = null );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Reads the current scroll position and updates our active\n\t * trigger states accordingly.\n\t */\n\tsyncScrollPosition() {\n\n\t\tconst viewportHeight = this.viewportElement.offsetHeight;\n\t\tconst viewportHeightFactor = viewportHeight / this.viewportElement.scrollHeight;\n\n\t\tconst scrollTop = this.viewportElement.scrollTop;\n\t\tconst scrollHeight = this.viewportElement.scrollHeight - viewportHeight\n\t\tconst scrollProgress = Math.max( Math.min( scrollTop / scrollHeight, 1 ), 0 );\n\t\tconst scrollProgressMid = Math.max( Math.min( ( scrollTop + viewportHeight / 2 ) / this.viewportElement.scrollHeight, 1 ), 0 );\n\n\t\tlet activePage;\n\n\t\tthis.slideTriggers.forEach( ( trigger ) => {\n\t\t\tconst { page } = trigger;\n\n\t\t\tconst shouldPreload = scrollProgress >= trigger.range[0] - viewportHeightFactor*2 &&\n\t\t\t\t\t\t\t\t\t\t\t\t\t\tscrollProgress <= trigger.range[1] + viewportHeightFactor*2;\n\n\t\t\t// Load slides that are within the preload range\n\t\t\tif( shouldPreload && !page.loaded ) {\n\t\t\t\tpage.loaded = true;\n\t\t\t\tthis.Reveal.slideContent.load( page.slideElement );\n\t\t\t}\n\t\t\telse if( page.loaded ) {\n\t\t\t\tpage.loaded = false;\n\t\t\t\tthis.Reveal.slideContent.unload( page.slideElement );\n\t\t\t}\n\n\t\t\t// If we're within this trigger range, activate it\n\t\t\tif( scrollProgress >= trigger.range[0] && scrollProgress <= trigger.range[1] ) {\n\t\t\t\tthis.activateTrigger( trigger );\n\t\t\t\tactivePage = trigger.page;\n\t\t\t}\n\t\t\t// .. otherwise deactivate\n\t\t\telse if( trigger.active ) {\n\t\t\t\tthis.deactivateTrigger( trigger );\n\t\t\t}\n\t\t} );\n\n\t\t// Each page can have its own scroll triggers, check if any of those\n\t\t// need to be activated/deactivated\n\t\tif( activePage ) {\n\t\t\tactivePage.scrollTriggers.forEach( ( trigger ) => {\n\t\t\t\tif( scrollProgressMid >= trigger.range[0] && scrollProgressMid <= trigger.range[1] ) {\n\t\t\t\t\tthis.activateTrigger( trigger );\n\t\t\t\t}\n\t\t\t\telse if( trigger.active ) {\n\t\t\t\t\tthis.deactivateTrigger( trigger );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\n\t\t// Update our visual progress indication\n\t\tthis.setProgressBarValue( scrollTop / ( this.viewportElement.scrollHeight - viewportHeight ) );\n\n\t}\n\n\t/**\n\t * Moves the progress bar playhead to the specified position.\n\t *\n\t * @param {number} progress 0-1\n\t */\n\tsetProgressBarValue( progress ) {\n\n\t\tif( this.progressBar ) {\n\n\t\t\tthis.progressBarPlayhead.style.transform = `translateY(${progress * this.progressBarScrollableHeight}px)`;\n\n\t\t\tthis.getAllPages()\n\t\t\t\t.filter( page => page.progressBarSlide )\n\t\t\t\t.forEach( ( page ) => {\n\t\t\t\t\tpage.progressBarSlide.classList.toggle( 'active', page.active === true );\n\n\t\t\t\t\tpage.scrollTriggers.forEach( ( trigger, i ) => {\n\t\t\t\t\t\tpage.scrollTriggerElements[i].classList.toggle( 'active', page.active === true && trigger.active === true );\n\t\t\t\t\t} );\n\t\t\t\t} );\n\n\t\t\tthis.showProgressBar();\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Show the progress bar and, if configured, automatically hide\n\t * it after a delay.\n\t */\n\tshowProgressBar() {\n\n\t\tthis.progressBar.classList.add( 'visible' );\n\n\t\tclearTimeout( this.hideProgressBarTimeout );\n\n\t\tif( this.Reveal.getConfig().scrollProgress === 'auto' && !this.draggingProgressBar ) {\n\n\t\t\tthis.hideProgressBarTimeout = setTimeout( () => {\n\t\t\t\tif( this.progressBar ) {\n\t\t\t\t\tthis.progressBar.classList.remove( 'visible' );\n\t\t\t\t}\n\t\t\t}, HIDE_SCROLLBAR_TIMEOUT );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Scroll to the previous page.\n\t */\n\tprev() {\n\n\t\tthis.viewportElement.scrollTop -= this.scrollTriggerHeight;\n\n\t}\n\n\t/**\n\t * Scroll to the next page.\n\t */\n\tnext() {\n\n\t\tthis.viewportElement.scrollTop += this.scrollTriggerHeight;\n\n\t}\n\n\t/**\n\t * Scrolls the given slide element into view.\n\t *\n\t * @param {HTMLElement} slideElement\n\t */\n\tscrollToSlide( slideElement ) {\n\n\t\t// If the scroll view isn't active yet, queue this action\n\t\tif( !this.active ) {\n\t\t\tthis.activatedCallbacks.push( () => this.scrollToSlide( slideElement ) );\n\t\t}\n\t\telse {\n\t\t\t// Find the trigger for this slide\n\t\t\tconst trigger = this.getScrollTriggerBySlide( slideElement );\n\n\t\t\tif( trigger ) {\n\t\t\t\t// Use the trigger's range to calculate the scroll position\n\t\t\t\tthis.viewportElement.scrollTop = trigger.range[0] * ( this.viewportElement.scrollHeight - this.viewportElement.offsetHeight );\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Persists the current scroll position to session storage\n\t * so that it can be restored.\n\t */\n\tstoreScrollPosition() {\n\n\t\tclearTimeout( this.storeScrollPositionTimeout );\n\n\t\tthis.storeScrollPositionTimeout = setTimeout( () => {\n\t\t\tsessionStorage.setItem( 'reveal-scroll-top', this.viewportElement.scrollTop );\n\t\t\tsessionStorage.setItem( 'reveal-scroll-origin', location.origin + location.pathname );\n\n\t\t\tthis.storeScrollPositionTimeout = null;\n\t\t}, 50 );\n\n\t}\n\n\t/**\n\t * Restores the scroll position when a deck is reloader.\n\t */\n\trestoreScrollPosition() {\n\n\t\tconst scrollPosition = sessionStorage.getItem( 'reveal-scroll-top' );\n\t\tconst scrollOrigin = sessionStorage.getItem( 'reveal-scroll-origin' );\n\n\t\tif( scrollPosition && scrollOrigin === location.origin + location.pathname ) {\n\t\t\tthis.viewportElement.scrollTop = parseInt( scrollPosition, 10 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Activates the given page and starts its embedded content\n\t * if there is any.\n\t *\n\t * @param {object} page\n\t */\n\tactivatePage( page ) {\n\n\t\tif( !page.active ) {\n\n\t\t\tpage.active = true;\n\n\t\t\tconst { slideElement, backgroundElement, contentElement, indexh, indexv } = page;\n\n\t\t\tcontentElement.style.display = 'block';\n\n\t\t\tslideElement.classList.add( 'present' );\n\n\t\t\tif( backgroundElement ) {\n\t\t\t\tbackgroundElement.classList.add( 'present' );\n\t\t\t}\n\n\t\t\tthis.Reveal.setCurrentScrollPage( slideElement, indexh, indexv );\n\t\t\tthis.Reveal.backgrounds.bubbleSlideContrastClassToElement( slideElement, this.viewportElement );\n\n\t\t\t// If this page is part of an auto-animation there will be one\n\t\t\t// content element per auto-animated page. We need to show the\n\t\t\t// current page and hide all others.\n\t\t\tArray.from( contentElement.parentNode.querySelectorAll( '.scroll-page-content' ) ).forEach( sibling => {\n\t\t\t\tif( sibling !== contentElement ) {\n\t\t\t\t\tsibling.style.display = 'none';\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Deactivates the page after it has been visible.\n\t *\n\t * @param {object} page\n\t */\n\tdeactivatePage( page ) {\n\n\t\tif( page.active ) {\n\n\t\t\tpage.active = false;\n\t\t\tif( page.slideElement ) page.slideElement.classList.remove( 'present' );\n\t\t\tif( page.backgroundElement ) page.backgroundElement.classList.remove( 'present' );\n\n\t\t}\n\n\t}\n\n\tactivateTrigger( trigger ) {\n\n\t\tif( !trigger.active ) {\n\t\t\ttrigger.active = true;\n\t\t\ttrigger.activate();\n\t\t}\n\n\t}\n\n\tdeactivateTrigger( trigger ) {\n\n\t\tif( trigger.active ) {\n\t\t\ttrigger.active = false;\n\n\t\t\tif( trigger.deactivate ) {\n\t\t\t\ttrigger.deactivate();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Retrieve a slide by its original h/v index (i.e. the indices the\n\t * slide had before being linearized).\n\t *\n\t * @param {number} h\n\t * @param {number} v\n\t * @returns {HTMLElement}\n\t */\n\tgetSlideByIndices( h, v ) {\n\n\t\tconst page = this.getAllPages().find( page => {\n\t\t\treturn page.indexh === h && page.indexv === v;\n\t\t} );\n\n\t\treturn page ? page.slideElement : null;\n\n\t}\n\n\t/**\n\t * Retrieve a list of all scroll triggers for the given slide\n\t * DOM element.\n\t *\n\t * @param {HTMLElement} slide\n\t * @returns {Array}\n\t */\n\tgetScrollTriggerBySlide( slide ) {\n\n\t\treturn this.slideTriggers.find( trigger => trigger.page.slideElement === slide );\n\n\t}\n\n\t/**\n\t * Get a list of all pages in the scroll view. This includes\n\t * both top-level slides and auto-animate steps.\n\t *\n\t * @returns {Array}\n\t */\n\tgetAllPages() {\n\n\t\treturn this.pages.flatMap( page => [page, ...(page.autoAnimatePages || [])] );\n\n\t}\n\n\tonScroll() {\n\n\t\tthis.syncScrollPosition();\n\t\tthis.storeScrollPosition();\n\n\t}\n\n\tget viewportElement() {\n\n\t\treturn this.Reveal.getViewportElement();\n\n\t}\n\n}\n","import { SLIDES_SELECTOR } from '../utils/constants.js'\nimport { queryAll, createStyleSheet } from '../utils/util.js'\n\n/**\n * Setups up our presentation for printing/exporting to PDF.\n */\nexport default class PrintView {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\t/**\n\t * Configures the presentation for printing to a static\n\t * PDF.\n\t */\n\tasync activate() {\n\n\t\tconst config = this.Reveal.getConfig();\n\t\tconst slides = queryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR )\n\n\t\t// Compute slide numbers now, before we start duplicating slides\n\t\tconst injectPageNumbers = config.slideNumber && /all|print/i.test( config.showSlideNumber );\n\n\t\tconst slideSize = this.Reveal.getComputedSlideSize( window.innerWidth, window.innerHeight );\n\n\t\t// Dimensions of the PDF pages\n\t\tconst pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),\n\t\t\tpageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) );\n\n\t\t// Dimensions of slides within the pages\n\t\tconst slideWidth = slideSize.width,\n\t\t\tslideHeight = slideSize.height;\n\n\t\tawait new Promise( requestAnimationFrame );\n\n\t\t// Let the browser know what page size we want to print\n\t\tcreateStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );\n\n\t\t// Limit the size of certain elements to the dimensions of the slide\n\t\tcreateStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );\n\n\t\tdocument.documentElement.classList.add( 'reveal-print', 'print-pdf' );\n\t\tdocument.body.style.width = pageWidth + 'px';\n\t\tdocument.body.style.height = pageHeight + 'px';\n\n\t\tconst viewportElement = this.Reveal.getViewportElement();\n\t\tlet presentationBackground;\n\t\tif( viewportElement ) {\n\t\t\tconst viewportStyles = window.getComputedStyle( viewportElement );\n\t\t\tif( viewportStyles && viewportStyles.background ) {\n\t\t\t\tpresentationBackground = viewportStyles.background;\n\t\t\t}\n\t\t}\n\n\t\t// Make sure stretch elements fit on slide\n\t\tawait new Promise( requestAnimationFrame );\n\t\tthis.Reveal.layoutSlideContents( slideWidth, slideHeight );\n\n\t\t// Batch scrollHeight access to prevent layout thrashing\n\t\tawait new Promise( requestAnimationFrame );\n\n\t\tconst slideScrollHeights = slides.map( slide => slide.scrollHeight );\n\n\t\tconst pages = [];\n\t\tconst pageContainer = slides[0].parentNode;\n\t\tlet slideNumber = 1;\n\n\t\t// Slide and slide background layout\n\t\tslides.forEach( function( slide, index ) {\n\n\t\t\t// Vertical stacks are not centred since their section\n\t\t\t// children will be\n\t\t\tif( slide.classList.contains( 'stack' ) === false ) {\n\t\t\t\t// Center the slide inside of the page, giving the slide some margin\n\t\t\t\tlet left = ( pageWidth - slideWidth ) / 2;\n\t\t\t\tlet top = ( pageHeight - slideHeight ) / 2;\n\n\t\t\t\tconst contentHeight = slideScrollHeights[ index ];\n\t\t\t\tlet numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );\n\n\t\t\t\t// Adhere to configured pages per slide limit\n\t\t\t\tnumberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );\n\n\t\t\t\t// Center slides vertically\n\t\t\t\tif( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {\n\t\t\t\t\ttop = Math.max( ( pageHeight - contentHeight ) / 2, 0 );\n\t\t\t\t}\n\n\t\t\t\t// Wrap the slide in a page element and hide its overflow\n\t\t\t\t// so that no page ever flows onto another\n\t\t\t\tconst page = document.createElement( 'div' );\n\t\t\t\tpages.push( page );\n\n\t\t\t\tpage.className = 'pdf-page';\n\t\t\t\tpage.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';\n\n\t\t\t\t// Copy the presentation-wide background to each individual\n\t\t\t\t// page when printing\n\t\t\t\tif( presentationBackground ) {\n\t\t\t\t\tpage.style.background = presentationBackground;\n\t\t\t\t}\n\n\t\t\t\tpage.appendChild( slide );\n\n\t\t\t\t// Position the slide inside of the page\n\t\t\t\tslide.style.left = left + 'px';\n\t\t\t\tslide.style.top = top + 'px';\n\t\t\t\tslide.style.width = slideWidth + 'px';\n\n\t\t\t\tthis.Reveal.slideContent.layout( slide );\n\n\t\t\t\tif( slide.slideBackgroundElement ) {\n\t\t\t\t\tpage.insertBefore( slide.slideBackgroundElement, slide );\n\t\t\t\t}\n\n\t\t\t\t// Inject notes if `showNotes` is enabled\n\t\t\t\tif( config.showNotes ) {\n\n\t\t\t\t\t// Are there notes for this slide?\n\t\t\t\t\tconst notes = this.Reveal.getSlideNotes( slide );\n\t\t\t\t\tif( notes ) {\n\n\t\t\t\t\t\tconst notesSpacing = 8;\n\t\t\t\t\t\tconst notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';\n\t\t\t\t\t\tconst notesElement = document.createElement( 'div' );\n\t\t\t\t\t\tnotesElement.classList.add( 'speaker-notes' );\n\t\t\t\t\t\tnotesElement.classList.add( 'speaker-notes-pdf' );\n\t\t\t\t\t\tnotesElement.setAttribute( 'data-layout', notesLayout );\n\t\t\t\t\t\tnotesElement.innerHTML = notes;\n\n\t\t\t\t\t\tif( notesLayout === 'separate-page' ) {\n\t\t\t\t\t\t\tpages.push( notesElement );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tnotesElement.style.left = notesSpacing + 'px';\n\t\t\t\t\t\t\tnotesElement.style.bottom = notesSpacing + 'px';\n\t\t\t\t\t\t\tnotesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';\n\t\t\t\t\t\t\tpage.appendChild( notesElement );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t// Inject page numbers if `slideNumbers` are enabled\n\t\t\t\tif( injectPageNumbers ) {\n\t\t\t\t\tconst numberElement = document.createElement( 'div' );\n\t\t\t\t\tnumberElement.classList.add( 'slide-number' );\n\t\t\t\t\tnumberElement.classList.add( 'slide-number-pdf' );\n\t\t\t\t\tnumberElement.innerHTML = slideNumber++;\n\t\t\t\t\tpage.appendChild( numberElement );\n\t\t\t\t}\n\n\t\t\t\t// Copy page and show fragments one after another\n\t\t\t\tif( config.pdfSeparateFragments ) {\n\n\t\t\t\t\t// Each fragment 'group' is an array containing one or more\n\t\t\t\t\t// fragments. Multiple fragments that appear at the same time\n\t\t\t\t\t// are part of the same group.\n\t\t\t\t\tconst fragmentGroups = this.Reveal.fragments.sort( page.querySelectorAll( '.fragment' ), true );\n\n\t\t\t\t\tlet previousFragmentStep;\n\n\t\t\t\t\tfragmentGroups.forEach( function( fragments, index ) {\n\n\t\t\t\t\t\t// Remove 'current-fragment' from the previous group\n\t\t\t\t\t\tif( previousFragmentStep ) {\n\t\t\t\t\t\t\tpreviousFragmentStep.forEach( function( fragment ) {\n\t\t\t\t\t\t\t\tfragment.classList.remove( 'current-fragment' );\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// Show the fragments for the current index\n\t\t\t\t\t\tfragments.forEach( function( fragment ) {\n\t\t\t\t\t\t\tfragment.classList.add( 'visible', 'current-fragment' );\n\t\t\t\t\t\t}, this );\n\n\t\t\t\t\t\t// Create a separate page for the current fragment state\n\t\t\t\t\t\tconst clonedPage = page.cloneNode( true );\n\n\t\t\t\t\t\t// Inject unique page numbers for fragments\n\t\t\t\t\t\tif( injectPageNumbers ) {\n\t\t\t\t\t\t\tconst numberElement = clonedPage.querySelector( '.slide-number-pdf' );\n\t\t\t\t\t\t\tconst fragmentNumber = index + 1;\n\t\t\t\t\t\t\tnumberElement.innerHTML += '.' + fragmentNumber;\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tpages.push( clonedPage );\n\n\t\t\t\t\t\tpreviousFragmentStep = fragments;\n\n\t\t\t\t\t}, this );\n\n\t\t\t\t\t// Reset the first/original page so that all fragments are hidden\n\t\t\t\t\tfragmentGroups.forEach( function( fragments ) {\n\t\t\t\t\t\tfragments.forEach( function( fragment ) {\n\t\t\t\t\t\t\tfragment.classList.remove( 'visible', 'current-fragment' );\n\t\t\t\t\t\t} );\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\t\t\t\t// Show all fragments\n\t\t\t\telse {\n\t\t\t\t\tqueryAll( page, '.fragment:not(.fade-out)' ).forEach( function( fragment ) {\n\t\t\t\t\t\tfragment.classList.add( 'visible' );\n\t\t\t\t\t} );\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}, this );\n\n\t\tawait new Promise( requestAnimationFrame );\n\n\t\tpages.forEach( page => pageContainer.appendChild( page ) );\n\n\t\t// Re-run JS-based content layout after the slide is added to page DOM\n\t\tthis.Reveal.slideContent.layout( this.Reveal.getSlidesElement() );\n\n\t\t// Notify subscribers that the PDF layout is good to go\n\t\tthis.Reveal.dispatchEvent({ type: 'pdf-ready' });\n\n\t\tviewportElement.classList.remove( 'loading-scroll-mode' );\n\n\t}\n\n\t/**\n\t * Checks if the print mode is/should be activated.\n\t */\n\tisActive() {\n\n\t\treturn this.Reveal.getConfig().view === 'print';\n\n\t}\n\n}","import { extend, queryAll } from '../utils/util.js'\n\n/**\n * Handles sorting and navigation of slide fragments.\n * Fragments are elements within a slide that are\n * revealed/animated incrementally.\n */\nexport default class Fragments {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.fragments === false ) {\n\t\t\tthis.disable();\n\t\t}\n\t\telse if( oldConfig.fragments === false ) {\n\t\t\tthis.enable();\n\t\t}\n\n\t}\n\n\t/**\n\t * If fragments are disabled in the deck, they should all be\n\t * visible rather than stepped through.\n\t */\n\tdisable() {\n\n\t\tqueryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => {\n\t\t\telement.classList.add( 'visible' );\n\t\t\telement.classList.remove( 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Reverse of #disable(). Only called if fragments have\n\t * previously been disabled.\n\t */\n\tenable() {\n\n\t\tqueryAll( this.Reveal.getSlidesElement(), '.fragment' ).forEach( element => {\n\t\t\telement.classList.remove( 'visible' );\n\t\t\telement.classList.remove( 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Returns an object describing the available fragment\n\t * directions.\n\t *\n\t * @return {{prev: boolean, next: boolean}}\n\t */\n\tavailableRoutes() {\n\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tif( currentSlide && this.Reveal.getConfig().fragments ) {\n\t\t\tlet fragments = currentSlide.querySelectorAll( '.fragment:not(.disabled)' );\n\t\t\tlet hiddenFragments = currentSlide.querySelectorAll( '.fragment:not(.disabled):not(.visible)' );\n\n\t\t\treturn {\n\t\t\t\tprev: fragments.length - hiddenFragments.length > 0,\n\t\t\t\tnext: !!hiddenFragments.length\n\t\t\t};\n\t\t}\n\t\telse {\n\t\t\treturn { prev: false, next: false };\n\t\t}\n\n\t}\n\n\t/**\n\t * Return a sorted fragments list, ordered by an increasing\n\t * \"data-fragment-index\" attribute.\n\t *\n\t * Fragments will be revealed in the order that they are returned by\n\t * this function, so you can use the index attributes to control the\n\t * order of fragment appearance.\n\t *\n\t * To maintain a sensible default fragment order, fragments are presumed\n\t * to be passed in document order. This function adds a \"fragment-index\"\n\t * attribute to each node if such an attribute is not already present,\n\t * and sets that attribute to an integer value which is the position of\n\t * the fragment within the fragments list.\n\t *\n\t * @param {object[]|*} fragments\n\t * @param {boolean} grouped If true the returned array will contain\n\t * nested arrays for all fragments with the same index\n\t * @return {object[]} sorted Sorted array of fragments\n\t */\n\tsort( fragments, grouped = false ) {\n\n\t\tfragments = Array.from( fragments );\n\n\t\tlet ordered = [],\n\t\t\tunordered = [],\n\t\t\tsorted = [];\n\n\t\t// Group ordered and unordered elements\n\t\tfragments.forEach( fragment => {\n\t\t\tif( fragment.hasAttribute( 'data-fragment-index' ) ) {\n\t\t\t\tlet index = parseInt( fragment.getAttribute( 'data-fragment-index' ), 10 );\n\n\t\t\t\tif( !ordered[index] ) {\n\t\t\t\t\tordered[index] = [];\n\t\t\t\t}\n\n\t\t\t\tordered[index].push( fragment );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tunordered.push( [ fragment ] );\n\t\t\t}\n\t\t} );\n\n\t\t// Append fragments without explicit indices in their\n\t\t// DOM order\n\t\tordered = ordered.concat( unordered );\n\n\t\t// Manually count the index up per group to ensure there\n\t\t// are no gaps\n\t\tlet index = 0;\n\n\t\t// Push all fragments in their sorted order to an array,\n\t\t// this flattens the groups\n\t\tordered.forEach( group => {\n\t\t\tgroup.forEach( fragment => {\n\t\t\t\tsorted.push( fragment );\n\t\t\t\tfragment.setAttribute( 'data-fragment-index', index );\n\t\t\t} );\n\n\t\t\tindex ++;\n\t\t} );\n\n\t\treturn grouped === true ? ordered : sorted;\n\n\t}\n\n\t/**\n\t * Sorts and formats all of fragments in the\n\t * presentation.\n\t */\n\tsortAll() {\n\n\t\tthis.Reveal.getHorizontalSlides().forEach( horizontalSlide => {\n\n\t\t\tlet verticalSlides = queryAll( horizontalSlide, 'section' );\n\t\t\tverticalSlides.forEach( ( verticalSlide, y ) => {\n\n\t\t\t\tthis.sort( verticalSlide.querySelectorAll( '.fragment' ) );\n\n\t\t\t}, this );\n\n\t\t\tif( verticalSlides.length === 0 ) this.sort( horizontalSlide.querySelectorAll( '.fragment' ) );\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Refreshes the fragments on the current slide so that they\n\t * have the appropriate classes (.visible + .current-fragment).\n\t *\n\t * @param {number} [index] The index of the current fragment\n\t * @param {array} [fragments] Array containing all fragments\n\t * in the current slide\n\t *\n\t * @return {{shown: array, hidden: array}}\n\t */\n\tupdate( index, fragments, slide = this.Reveal.getCurrentSlide() ) {\n\n\t\tlet changedFragments = {\n\t\t\tshown: [],\n\t\t\thidden: []\n\t\t};\n\n\t\tif( slide && this.Reveal.getConfig().fragments ) {\n\n\t\t\tfragments = fragments || this.sort( slide.querySelectorAll( '.fragment' ) );\n\n\t\t\tif( fragments.length ) {\n\n\t\t\t\tlet maxIndex = 0;\n\n\t\t\t\tif( typeof index !== 'number' ) {\n\t\t\t\t\tlet currentFragment = this.sort( slide.querySelectorAll( '.fragment.visible' ) ).pop();\n\t\t\t\t\tif( currentFragment ) {\n\t\t\t\t\t\tindex = parseInt( currentFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tArray.from( fragments ).forEach( ( el, i ) => {\n\n\t\t\t\t\tif( el.hasAttribute( 'data-fragment-index' ) ) {\n\t\t\t\t\t\ti = parseInt( el.getAttribute( 'data-fragment-index' ), 10 );\n\t\t\t\t\t}\n\n\t\t\t\t\tmaxIndex = Math.max( maxIndex, i );\n\n\t\t\t\t\t// Visible fragments\n\t\t\t\t\tif( i <= index ) {\n\t\t\t\t\t\tlet wasVisible = el.classList.contains( 'visible' )\n\t\t\t\t\t\tel.classList.add( 'visible' );\n\t\t\t\t\t\tel.classList.remove( 'current-fragment' );\n\n\t\t\t\t\t\tif( i === index ) {\n\t\t\t\t\t\t\t// Announce the fragments one by one to the Screen Reader\n\t\t\t\t\t\t\tthis.Reveal.announceStatus( this.Reveal.getStatusText( el ) );\n\n\t\t\t\t\t\t\tel.classList.add( 'current-fragment' );\n\t\t\t\t\t\t\tthis.Reveal.slideContent.startEmbeddedContent( el );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif( !wasVisible ) {\n\t\t\t\t\t\t\tchangedFragments.shown.push( el )\n\t\t\t\t\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\t\t\t\t\ttarget: el,\n\t\t\t\t\t\t\t\ttype: 'visible',\n\t\t\t\t\t\t\t\tbubbles: false\n\t\t\t\t\t\t\t});\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\t// Hidden fragments\n\t\t\t\t\telse {\n\t\t\t\t\t\tlet wasVisible = el.classList.contains( 'visible' )\n\t\t\t\t\t\tel.classList.remove( 'visible' );\n\t\t\t\t\t\tel.classList.remove( 'current-fragment' );\n\n\t\t\t\t\t\tif( wasVisible ) {\n\t\t\t\t\t\t\tthis.Reveal.slideContent.stopEmbeddedContent( el );\n\t\t\t\t\t\t\tchangedFragments.hidden.push( el );\n\t\t\t\t\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\t\t\t\t\ttarget: el,\n\t\t\t\t\t\t\t\ttype: 'hidden',\n\t\t\t\t\t\t\t\tbubbles: false\n\t\t\t\t\t\t\t});\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\n\t\t\t\t// Write the current fragment index to the slide <section>.\n\t\t\t\t// This can be used by end users to apply styles based on\n\t\t\t\t// the current fragment index.\n\t\t\t\tindex = typeof index === 'number' ? index : -1;\n\t\t\t\tindex = Math.max( Math.min( index, maxIndex ), -1 );\n\t\t\t\tslide.setAttribute( 'data-fragment', index );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif( changedFragments.hidden.length ) {\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'fragmenthidden',\n\t\t\t\tdata: {\n\t\t\t\t\tfragment: changedFragments.hidden[0],\n\t\t\t\t\tfragments: changedFragments.hidden\n\t\t\t\t}\n\t\t\t});\n\t\t}\n\n\t\tif( changedFragments.shown.length ) {\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'fragmentshown',\n\t\t\t\tdata: {\n\t\t\t\t\tfragment: changedFragments.shown[0],\n\t\t\t\t\tfragments: changedFragments.shown\n\t\t\t\t}\n\t\t\t});\n\t\t}\n\n\t\treturn changedFragments;\n\n\t}\n\n\t/**\n\t * Formats the fragments on the given slide so that they have\n\t * valid indices. Call this if fragments are changed in the DOM\n\t * after reveal.js has already initialized.\n\t *\n\t * @param {HTMLElement} slide\n\t * @return {Array} a list of the HTML fragments that were synced\n\t */\n\tsync( slide = this.Reveal.getCurrentSlide() ) {\n\n\t\treturn this.sort( slide.querySelectorAll( '.fragment' ) );\n\n\t}\n\n\t/**\n\t * Navigate to the specified slide fragment.\n\t *\n\t * @param {?number} index The index of the fragment that\n\t * should be shown, -1 means all are invisible\n\t * @param {number} offset Integer offset to apply to the\n\t * fragment index\n\t *\n\t * @return {boolean} true if a change was made in any\n\t * fragments visibility as part of this call\n\t */\n\tgoto( index, offset = 0 ) {\n\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tif( currentSlide && this.Reveal.getConfig().fragments ) {\n\n\t\t\tlet fragments = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled)' ) );\n\t\t\tif( fragments.length ) {\n\n\t\t\t\t// If no index is specified, find the current\n\t\t\t\tif( typeof index !== 'number' ) {\n\t\t\t\t\tlet lastVisibleFragment = this.sort( currentSlide.querySelectorAll( '.fragment:not(.disabled).visible' ) ).pop();\n\n\t\t\t\t\tif( lastVisibleFragment ) {\n\t\t\t\t\t\tindex = parseInt( lastVisibleFragment.getAttribute( 'data-fragment-index' ) || 0, 10 );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tindex = -1;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Apply the offset if there is one\n\t\t\t\tindex += offset;\n\n\t\t\t\tlet changedFragments = this.update( index, fragments );\n\n\t\t\t\tthis.Reveal.controls.update();\n\t\t\t\tthis.Reveal.progress.update();\n\n\t\t\t\tif( this.Reveal.getConfig().fragmentInURL ) {\n\t\t\t\t\tthis.Reveal.location.writeURL();\n\t\t\t\t}\n\n\t\t\t\treturn !!( changedFragments.shown.length || changedFragments.hidden.length );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Navigate to the next slide fragment.\n\t *\n\t * @return {boolean} true if there was a next fragment,\n\t * false otherwise\n\t */\n\tnext() {\n\n\t\treturn this.goto( null, 1 );\n\n\t}\n\n\t/**\n\t * Navigate to the previous slide fragment.\n\t *\n\t * @return {boolean} true if there was a previous fragment,\n\t * false otherwise\n\t */\n\tprev() {\n\n\t\treturn this.goto( null, -1 );\n\n\t}\n\n}","import { SLIDES_SELECTOR } from '../utils/constants.js'\nimport { extend, queryAll, transformElement } from '../utils/util.js'\n\n/**\n * Handles all logic related to the overview mode\n * (birds-eye view of all slides).\n */\nexport default class Overview {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.active = false;\n\n\t\tthis.onSlideClicked = this.onSlideClicked.bind( this );\n\n\t}\n\n\t/**\n\t * Displays the overview of slides (quick nav) by scaling\n\t * down and arranging all slide elements.\n\t */\n\tactivate() {\n\n\t\t// Only proceed if enabled in config\n\t\tif( this.Reveal.getConfig().overview && !this.Reveal.isScrollView() && !this.isActive() ) {\n\n\t\t\tthis.active = true;\n\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'overview' );\n\n\t\t\t// Don't auto-slide while in overview mode\n\t\t\tthis.Reveal.cancelAutoSlide();\n\n\t\t\t// Move the backgrounds element into the slide container to\n\t\t\t// that the same scaling is applied\n\t\t\tthis.Reveal.getSlidesElement().appendChild( this.Reveal.getBackgroundsElement() );\n\n\t\t\t// Clicking on an overview slide navigates to it\n\t\t\tqueryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => {\n\t\t\t\tif( !slide.classList.contains( 'stack' ) ) {\n\t\t\t\t\tslide.addEventListener( 'click', this.onSlideClicked, true );\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\t// Calculate slide sizes\n\t\t\tconst margin = 70;\n\t\t\tconst slideSize = this.Reveal.getComputedSlideSize();\n\t\t\tthis.overviewSlideWidth = slideSize.width + margin;\n\t\t\tthis.overviewSlideHeight = slideSize.height + margin;\n\n\t\t\t// Reverse in RTL mode\n\t\t\tif( this.Reveal.getConfig().rtl ) {\n\t\t\t\tthis.overviewSlideWidth = -this.overviewSlideWidth;\n\t\t\t}\n\n\t\t\tthis.Reveal.updateSlidesVisibility();\n\n\t\t\tthis.layout();\n\t\t\tthis.update();\n\n\t\t\tthis.Reveal.layout();\n\n\t\t\tconst indices = this.Reveal.getIndices();\n\n\t\t\t// Notify observers of the overview showing\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'overviewshown',\n\t\t\t\tdata: {\n\t\t\t\t\t'indexh': indices.h,\n\t\t\t\t\t'indexv': indices.v,\n\t\t\t\t\t'currentSlide': this.Reveal.getCurrentSlide()\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Uses CSS transforms to position all slides in a grid for\n\t * display inside of the overview mode.\n\t */\n\tlayout() {\n\n\t\t// Layout slides\n\t\tthis.Reveal.getHorizontalSlides().forEach( ( hslide, h ) => {\n\t\t\thslide.setAttribute( 'data-index-h', h );\n\t\t\ttransformElement( hslide, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' );\n\n\t\t\tif( hslide.classList.contains( 'stack' ) ) {\n\n\t\t\t\tqueryAll( hslide, 'section' ).forEach( ( vslide, v ) => {\n\t\t\t\t\tvslide.setAttribute( 'data-index-h', h );\n\t\t\t\t\tvslide.setAttribute( 'data-index-v', v );\n\n\t\t\t\t\ttransformElement( vslide, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' );\n\t\t\t\t} );\n\n\t\t\t}\n\t\t} );\n\n\t\t// Layout slide backgrounds\n\t\tArray.from( this.Reveal.getBackgroundsElement().childNodes ).forEach( ( hbackground, h ) => {\n\t\t\ttransformElement( hbackground, 'translate3d(' + ( h * this.overviewSlideWidth ) + 'px, 0, 0)' );\n\n\t\t\tqueryAll( hbackground, '.slide-background' ).forEach( ( vbackground, v ) => {\n\t\t\t\ttransformElement( vbackground, 'translate3d(0, ' + ( v * this.overviewSlideHeight ) + 'px, 0)' );\n\t\t\t} );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Moves the overview viewport to the current slides.\n\t * Called each time the current slide changes.\n\t */\n\tupdate() {\n\n\t\tconst vmin = Math.min( window.innerWidth, window.innerHeight );\n\t\tconst scale = Math.max( vmin / 5, 150 ) / vmin;\n\t\tconst indices = this.Reveal.getIndices();\n\n\t\tthis.Reveal.transformSlides( {\n\t\t\toverview: [\n\t\t\t\t'scale('+ scale +')',\n\t\t\t\t'translateX('+ ( -indices.h * this.overviewSlideWidth ) +'px)',\n\t\t\t\t'translateY('+ ( -indices.v * this.overviewSlideHeight ) +'px)'\n\t\t\t].join( ' ' )\n\t\t} );\n\n\t}\n\n\t/**\n\t * Exits the slide overview and enters the currently\n\t * active slide.\n\t */\n\tdeactivate() {\n\n\t\t// Only proceed if enabled in config\n\t\tif( this.Reveal.getConfig().overview ) {\n\n\t\t\tthis.active = false;\n\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'overview' );\n\n\t\t\t// Temporarily add a class so that transitions can do different things\n\t\t\t// depending on whether they are exiting/entering overview, or just\n\t\t\t// moving from slide to slide\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'overview-deactivating' );\n\n\t\t\tsetTimeout( () => {\n\t\t\t\tthis.Reveal.getRevealElement().classList.remove( 'overview-deactivating' );\n\t\t\t}, 1 );\n\n\t\t\t// Move the background element back out\n\t\t\tthis.Reveal.getRevealElement().appendChild( this.Reveal.getBackgroundsElement() );\n\n\t\t\t// Clean up changes made to slides\n\t\t\tqueryAll( this.Reveal.getRevealElement(), SLIDES_SELECTOR ).forEach( slide => {\n\t\t\t\ttransformElement( slide, '' );\n\n\t\t\t\tslide.removeEventListener( 'click', this.onSlideClicked, true );\n\t\t\t} );\n\n\t\t\t// Clean up changes made to backgrounds\n\t\t\tqueryAll( this.Reveal.getBackgroundsElement(), '.slide-background' ).forEach( background => {\n\t\t\t\ttransformElement( background, '' );\n\t\t\t} );\n\n\t\t\tthis.Reveal.transformSlides( { overview: '' } );\n\n\t\t\tconst indices = this.Reveal.getIndices();\n\n\t\t\tthis.Reveal.slide( indices.h, indices.v );\n\t\t\tthis.Reveal.layout();\n\t\t\tthis.Reveal.cueAutoSlide();\n\n\t\t\t// Notify observers of the overview hiding\n\t\t\tthis.Reveal.dispatchEvent({\n\t\t\t\ttype: 'overviewhidden',\n\t\t\t\tdata: {\n\t\t\t\t\t'indexh': indices.h,\n\t\t\t\t\t'indexv': indices.v,\n\t\t\t\t\t'currentSlide': this.Reveal.getCurrentSlide()\n\t\t\t\t}\n\t\t\t});\n\n\t\t}\n\t}\n\n\t/**\n\t * Toggles the slide overview mode on and off.\n\t *\n\t * @param {Boolean} [override] Flag which overrides the\n\t * toggle logic and forcibly sets the desired state. True means\n\t * overview is open, false means it's closed.\n\t */\n\ttoggle( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? this.activate() : this.deactivate();\n\t\t}\n\t\telse {\n\t\t\tthis.isActive() ? this.deactivate() : this.activate();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if the overview is currently active.\n\t *\n\t * @return {Boolean} true if the overview is active,\n\t * false otherwise\n\t */\n\tisActive() {\n\n\t\treturn this.active;\n\n\t}\n\n\t/**\n\t * Invoked when a slide is and we're in the overview.\n\t *\n\t * @param {object} event\n\t */\n\tonSlideClicked( event ) {\n\n\t\tif( this.isActive() ) {\n\t\t\tevent.preventDefault();\n\n\t\t\tlet element = event.target;\n\n\t\t\twhile( element && !element.nodeName.match( /section/gi ) ) {\n\t\t\t\telement = element.parentNode;\n\t\t\t}\n\n\t\t\tif( element && !element.classList.contains( 'disabled' ) ) {\n\n\t\t\t\tthis.deactivate();\n\n\t\t\t\tif( element.nodeName.match( /section/gi ) ) {\n\t\t\t\t\tlet h = parseInt( element.getAttribute( 'data-index-h' ), 10 ),\n\t\t\t\t\t\tv = parseInt( element.getAttribute( 'data-index-v' ), 10 );\n\n\t\t\t\t\tthis.Reveal.slide( h, v );\n\t\t\t\t}\n\n\t\t\t}\n\t\t}\n\n\t}\n\n}","import { enterFullscreen } from '../utils/util.js'\n\n/**\n * Handles all reveal.js keyboard interactions.\n */\nexport default class Keyboard {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// A key:value map of keyboard keys and descriptions of\n\t\t// the actions they trigger\n\t\tthis.shortcuts = {};\n\n\t\t// Holds custom key code mappings\n\t\tthis.bindings = {};\n\n\t\tthis.onDocumentKeyDown = this.onDocumentKeyDown.bind( this );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.navigationMode === 'linear' ) {\n\t\t\tthis.shortcuts['→ , ↓ , SPACE , N , L , J'] = 'Next slide';\n\t\t\tthis.shortcuts['← , ↑ , P , H , K'] = 'Previous slide';\n\t\t}\n\t\telse {\n\t\t\tthis.shortcuts['N , SPACE'] = 'Next slide';\n\t\t\tthis.shortcuts['P , Shift SPACE'] = 'Previous slide';\n\t\t\tthis.shortcuts['← , H'] = 'Navigate left';\n\t\t\tthis.shortcuts['→ , L'] = 'Navigate right';\n\t\t\tthis.shortcuts['↑ , K'] = 'Navigate up';\n\t\t\tthis.shortcuts['↓ , J'] = 'Navigate down';\n\t\t}\n\n\t\tthis.shortcuts['Alt + ←/↑/→/↓'] = 'Navigate without fragments';\n\t\tthis.shortcuts['Shift + ←/↑/→/↓'] = 'Jump to first/last slide';\n\t\tthis.shortcuts['B , .'] = 'Pause';\n\t\tthis.shortcuts['F'] = 'Fullscreen';\n\t\tthis.shortcuts['G'] = 'Jump to slide';\n\t\tthis.shortcuts['ESC, O'] = 'Slide overview';\n\n\t}\n\n\t/**\n\t * Starts listening for keyboard events.\n\t */\n\tbind() {\n\n\t\tdocument.addEventListener( 'keydown', this.onDocumentKeyDown, false );\n\n\t}\n\n\t/**\n\t * Stops listening for keyboard events.\n\t */\n\tunbind() {\n\n\t\tdocument.removeEventListener( 'keydown', this.onDocumentKeyDown, false );\n\n\t}\n\n\t/**\n\t * Add a custom key binding with optional description to\n\t * be added to the help screen.\n\t */\n\taddKeyBinding( binding, callback ) {\n\n\t\tif( typeof binding === 'object' && binding.keyCode ) {\n\t\t\tthis.bindings[binding.keyCode] = {\n\t\t\t\tcallback: callback,\n\t\t\t\tkey: binding.key,\n\t\t\t\tdescription: binding.description\n\t\t\t};\n\t\t}\n\t\telse {\n\t\t\tthis.bindings[binding] = {\n\t\t\t\tcallback: callback,\n\t\t\t\tkey: null,\n\t\t\t\tdescription: null\n\t\t\t};\n\t\t}\n\n\t}\n\n\t/**\n\t * Removes the specified custom key binding.\n\t */\n\tremoveKeyBinding( keyCode ) {\n\n\t\tdelete this.bindings[keyCode];\n\n\t}\n\n\t/**\n\t * Programmatically triggers a keyboard event\n\t *\n\t * @param {int} keyCode\n\t */\n\ttriggerKey( keyCode ) {\n\n\t\tthis.onDocumentKeyDown( { keyCode } );\n\n\t}\n\n\t/**\n\t * Registers a new shortcut to include in the help overlay\n\t *\n\t * @param {String} key\n\t * @param {String} value\n\t */\n\tregisterKeyboardShortcut( key, value ) {\n\n\t\tthis.shortcuts[key] = value;\n\n\t}\n\n\tgetShortcuts() {\n\n\t\treturn this.shortcuts;\n\n\t}\n\n\tgetBindings() {\n\n\t\treturn this.bindings;\n\n\t}\n\n\t/**\n\t * Handler for the document level 'keydown' event.\n\t *\n\t * @param {object} event\n\t */\n\tonDocumentKeyDown( event ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\n\t\t// If there's a condition specified and it returns false,\n\t\t// ignore this event\n\t\tif( typeof config.keyboardCondition === 'function' && config.keyboardCondition(event) === false ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// If keyboardCondition is set, only capture keyboard events\n\t\t// for embedded decks when they are focused\n\t\tif( config.keyboardCondition === 'focused' && !this.Reveal.isFocused() ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Shorthand\n\t\tlet keyCode = event.keyCode;\n\n\t\t// Remember if auto-sliding was paused so we can toggle it\n\t\tlet autoSlideWasPaused = !this.Reveal.isAutoSliding();\n\n\t\tthis.Reveal.onUserInput( event );\n\n\t\t// Is there a focused element that could be using the keyboard?\n\t\tlet activeElementIsCE = document.activeElement && document.activeElement.isContentEditable === true;\n\t\tlet activeElementIsInput = document.activeElement && document.activeElement.tagName && /input|textarea/i.test( document.activeElement.tagName );\n\t\tlet activeElementIsNotes = document.activeElement && document.activeElement.className && /speaker-notes/i.test( document.activeElement.className);\n\n\t\t// Whitelist certain modifiers for slide navigation shortcuts\n\t\tlet keyCodeUsesModifier = [32, 37, 38, 39, 40, 63, 78, 80, 191].indexOf( event.keyCode ) !== -1;\n\n\t\t// Prevent all other events when a modifier is pressed\n\t\tlet unusedModifier = \t!( keyCodeUsesModifier && event.shiftKey || event.altKey ) &&\n\t\t\t\t\t\t\t\t( event.shiftKey || event.altKey || event.ctrlKey || event.metaKey );\n\n\t\t// Disregard the event if there's a focused element or a\n\t\t// keyboard modifier key is present\n\t\tif( activeElementIsCE || activeElementIsInput || activeElementIsNotes || unusedModifier ) return;\n\n\t\t// While paused only allow resume keyboard events; 'b', 'v', '.'\n\t\tlet resumeKeyCodes = [66,86,190,191,112];\n\t\tlet key;\n\n\t\t// Custom key bindings for togglePause should be able to resume\n\t\tif( typeof config.keyboard === 'object' ) {\n\t\t\tfor( key in config.keyboard ) {\n\t\t\t\tif( config.keyboard[key] === 'togglePause' ) {\n\t\t\t\t\tresumeKeyCodes.push( parseInt( key, 10 ) );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif( this.Reveal.isPaused() && resumeKeyCodes.indexOf( keyCode ) === -1 ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Use linear navigation if we're configured to OR if\n\t\t// the presentation is one-dimensional\n\t\tlet useLinearMode = config.navigationMode === 'linear' || !this.Reveal.hasHorizontalSlides() || !this.Reveal.hasVerticalSlides();\n\n\t\tlet triggered = false;\n\n\t\t// 1. User defined key bindings\n\t\tif( typeof config.keyboard === 'object' ) {\n\n\t\t\tfor( key in config.keyboard ) {\n\n\t\t\t\t// Check if this binding matches the pressed key\n\t\t\t\tif( parseInt( key, 10 ) === keyCode ) {\n\n\t\t\t\t\tlet value = config.keyboard[ key ];\n\n\t\t\t\t\t// Callback function\n\t\t\t\t\tif( typeof value === 'function' ) {\n\t\t\t\t\t\tvalue.apply( null, [ event ] );\n\t\t\t\t\t}\n\t\t\t\t\t// String shortcuts to reveal.js API\n\t\t\t\t\telse if( typeof value === 'string' && typeof this.Reveal[ value ] === 'function' ) {\n\t\t\t\t\t\tthis.Reveal[ value ].call();\n\t\t\t\t\t}\n\n\t\t\t\t\ttriggered = true;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// 2. Registered custom key bindings\n\t\tif( triggered === false ) {\n\n\t\t\tfor( key in this.bindings ) {\n\n\t\t\t\t// Check if this binding matches the pressed key\n\t\t\t\tif( parseInt( key, 10 ) === keyCode ) {\n\n\t\t\t\t\tlet action = this.bindings[ key ].callback;\n\n\t\t\t\t\t// Callback function\n\t\t\t\t\tif( typeof action === 'function' ) {\n\t\t\t\t\t\taction.apply( null, [ event ] );\n\t\t\t\t\t}\n\t\t\t\t\t// String shortcuts to reveal.js API\n\t\t\t\t\telse if( typeof action === 'string' && typeof this.Reveal[ action ] === 'function' ) {\n\t\t\t\t\t\tthis.Reveal[ action ].call();\n\t\t\t\t\t}\n\n\t\t\t\t\ttriggered = true;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// 3. System defined key bindings\n\t\tif( triggered === false ) {\n\n\t\t\t// Assume true and try to prove false\n\t\t\ttriggered = true;\n\n\t\t\t// P, PAGE UP\n\t\t\tif( keyCode === 80 || keyCode === 33 ) {\n\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t}\n\t\t\t// N, PAGE DOWN\n\t\t\telse if( keyCode === 78 || keyCode === 34 ) {\n\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t}\n\t\t\t// H, LEFT\n\t\t\telse if( keyCode === 72 || keyCode === 37 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( 0 );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tif( config.rtl ) {\n\t\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.left({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// L, RIGHT\n\t\t\telse if( keyCode === 76 || keyCode === 39 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tif( config.rtl ) {\n\t\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.right({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// K, UP\n\t\t\telse if( keyCode === 75 || keyCode === 38 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( undefined, 0 );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.up({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// J, DOWN\n\t\t\telse if( keyCode === 74 || keyCode === 40 ) {\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.slide( undefined, Number.MAX_VALUE );\n\t\t\t\t}\n\t\t\t\telse if( !this.Reveal.overview.isActive() && useLinearMode ) {\n\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.down({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// HOME\n\t\t\telse if( keyCode === 36 ) {\n\t\t\t\tthis.Reveal.slide( 0 );\n\t\t\t}\n\t\t\t// END\n\t\t\telse if( keyCode === 35 ) {\n\t\t\t\tthis.Reveal.slide( this.Reveal.getHorizontalSlides().length - 1 );\n\t\t\t}\n\t\t\t// SPACE\n\t\t\telse if( keyCode === 32 ) {\n\t\t\t\tif( this.Reveal.overview.isActive() ) {\n\t\t\t\t\tthis.Reveal.overview.deactivate();\n\t\t\t\t}\n\t\t\t\tif( event.shiftKey ) {\n\t\t\t\t\tthis.Reveal.prev({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.Reveal.next({skipFragments: event.altKey});\n\t\t\t\t}\n\t\t\t}\n\t\t\t// TWO-SPOT, SEMICOLON, B, V, PERIOD, LOGITECH PRESENTER TOOLS \"BLACK SCREEN\" BUTTON\n\t\t\telse if( [58, 59, 66, 86, 190].includes( keyCode ) || ( keyCode === 191 && !event.shiftKey ) ) {\n\t\t\t\tthis.Reveal.togglePause();\n\t\t\t}\n\t\t\t// F\n\t\t\telse if( keyCode === 70 ) {\n\t\t\t\tenterFullscreen( config.embedded ? this.Reveal.getViewportElement() : document.documentElement );\n\t\t\t}\n\t\t\t// A\n\t\t\telse if( keyCode === 65 ) {\n\t\t\t\tif( config.autoSlideStoppable ) {\n\t\t\t\t\tthis.Reveal.toggleAutoSlide( autoSlideWasPaused );\n\t\t\t\t}\n\t\t\t}\n\t\t\t// G\n\t\t\telse if( keyCode === 71 ) {\n\t\t\t\tif( config.jumpToSlide ) {\n\t\t\t\t\tthis.Reveal.toggleJumpToSlide();\n\t\t\t\t}\n\t\t\t}\n\t\t\t// ?\n\t\t\telse if( ( keyCode === 63 || keyCode === 191 ) && event.shiftKey ) {\n\t\t\t\tthis.Reveal.toggleHelp();\n\t\t\t}\n\t\t\t// F1\n\t\t\telse if( keyCode === 112 ) {\n\t\t\t\tthis.Reveal.toggleHelp();\n\t\t\t}\n\t\t\telse {\n\t\t\t\ttriggered = false;\n\t\t\t}\n\n\t\t}\n\n\t\t// If the input resulted in a triggered action we should prevent\n\t\t// the browsers default behavior\n\t\tif( triggered ) {\n\t\t\tevent.preventDefault && event.preventDefault();\n\t\t}\n\t\t// ESC or O key\n\t\telse if( keyCode === 27 || keyCode === 79 ) {\n\t\t\tif( this.Reveal.closeOverlay() === false ) {\n\t\t\t\tthis.Reveal.overview.toggle();\n\t\t\t}\n\n\t\t\tevent.preventDefault && event.preventDefault();\n\t\t}\n\n\t\t// If auto-sliding is enabled we need to cue up\n\t\t// another timeout\n\t\tthis.Reveal.cueAutoSlide();\n\n\t}\n\n}\n","/**\n * Reads and writes the URL based on reveal.js' current state.\n */\nexport default class Location {\n\n\t// The minimum number of milliseconds that must pass between\n\t// calls to history.replaceState\n\tMAX_REPLACE_STATE_FREQUENCY = 1000\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// Delays updates to the URL due to a Chrome thumbnailer bug\n\t\tthis.writeURLTimeout = 0;\n\n\t\tthis.replaceStateTimestamp = 0;\n\n\t\tthis.onWindowHashChange = this.onWindowHashChange.bind( this );\n\n\t}\n\n\tbind() {\n\n\t\twindow.addEventListener( 'hashchange', this.onWindowHashChange, false );\n\n\t}\n\n\tunbind() {\n\n\t\twindow.removeEventListener( 'hashchange', this.onWindowHashChange, false );\n\n\t}\n\n\t/**\n\t * Returns the slide indices for the given hash link.\n\t *\n\t * @param {string} [hash] the hash string that we want to\n\t * find the indices for\n\t *\n\t * @returns slide indices or null\n\t */\n\tgetIndicesFromHash( hash=window.location.hash, options={} ) {\n\n\t\t// Attempt to parse the hash as either an index or name\n\t\tlet name = hash.replace( /^#\\/?/, '' );\n\t\tlet bits = name.split( '/' );\n\n\t\t// If the first bit is not fully numeric and there is a name we\n\t\t// can assume that this is a named link\n\t\tif( !/^[0-9]*$/.test( bits[0] ) && name.length ) {\n\t\t\tlet slide;\n\n\t\t\tlet f;\n\n\t\t\t// Parse named links with fragments (#/named-link/2)\n\t\t\tif( /\\/[-\\d]+$/g.test( name ) ) {\n\t\t\t\tf = parseInt( name.split( '/' ).pop(), 10 );\n\t\t\t\tf = isNaN(f) ? undefined : f;\n\t\t\t\tname = name.split( '/' ).shift();\n\t\t\t}\n\n\t\t\t// Ensure the named link is a valid HTML ID attribute\n\t\t\ttry {\n\t\t\t\tslide = document\n\t\t\t\t\t.getElementById( decodeURIComponent( name ) )\n\t\t\t\t\t.closest('.slides section');\n\t\t\t}\n\t\t\tcatch ( error ) { }\n\n\t\t\tif( slide ) {\n\t\t\t\treturn { ...this.Reveal.getIndices( slide ), f };\n\t\t\t}\n\t\t}\n\t\telse {\n\t\t\tconst config = this.Reveal.getConfig();\n\t\t\tlet hashIndexBase = config.hashOneBasedIndex || options.oneBasedIndex ? 1 : 0;\n\n\t\t\t// Read the index components of the hash\n\t\t\tlet h = ( parseInt( bits[0], 10 ) - hashIndexBase ) || 0,\n\t\t\t\tv = ( parseInt( bits[1], 10 ) - hashIndexBase ) || 0,\n\t\t\t\tf;\n\n\t\t\tif( config.fragmentInURL ) {\n\t\t\t\tf = parseInt( bits[2], 10 );\n\t\t\t\tif( isNaN( f ) ) {\n\t\t\t\t\tf = undefined;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn { h, v, f };\n\t\t}\n\n\t\t// The hash couldn't be parsed or no matching named link was found\n\t\treturn null\n\n\t}\n\n\t/**\n\t * Reads the current URL (hash) and navigates accordingly.\n\t */\n\treadURL() {\n\n\t\tconst currentIndices = this.Reveal.getIndices();\n\t\tconst newIndices = this.getIndicesFromHash();\n\n\t\tif( newIndices ) {\n\t\t\tif( ( newIndices.h !== currentIndices.h || newIndices.v !== currentIndices.v || newIndices.f !== undefined ) ) {\n\t\t\t\t\tthis.Reveal.slide( newIndices.h, newIndices.v, newIndices.f );\n\t\t\t}\n\t\t}\n\t\t// If no new indices are available, we're trying to navigate to\n\t\t// a slide hash that does not exist\n\t\telse {\n\t\t\tthis.Reveal.slide( currentIndices.h || 0, currentIndices.v || 0 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates the page URL (hash) to reflect the current\n\t * state.\n\t *\n\t * @param {number} delay The time in ms to wait before\n\t * writing the hash\n\t */\n\twriteURL( delay ) {\n\n\t\tlet config = this.Reveal.getConfig();\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\n\t\t// Make sure there's never more than one timeout running\n\t\tclearTimeout( this.writeURLTimeout );\n\n\t\t// If a delay is specified, timeout this call\n\t\tif( typeof delay === 'number' ) {\n\t\t\tthis.writeURLTimeout = setTimeout( this.writeURL, delay );\n\t\t}\n\t\telse if( currentSlide ) {\n\n\t\t\tlet hash = this.getHash();\n\n\t\t\t// If we're configured to push to history OR the history\n\t\t\t// API is not available.\n\t\t\tif( config.history ) {\n\t\t\t\twindow.location.hash = hash;\n\t\t\t}\n\t\t\t// If we're configured to reflect the current slide in the\n\t\t\t// URL without pushing to history.\n\t\t\telse if( config.hash ) {\n\t\t\t\t// If the hash is empty, don't add it to the URL\n\t\t\t\tif( hash === '/' ) {\n\t\t\t\t\tthis.debouncedReplaceState( window.location.pathname + window.location.search );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tthis.debouncedReplaceState( '#' + hash );\n\t\t\t\t}\n\t\t\t}\n\t\t\t// UPDATE: The below nuking of all hash changes breaks\n\t\t\t// anchors on pages where reveal.js is running. Removed\n\t\t\t// in 4.0. Why was it here in the first place? ¯\\_(ツ)_/¯\n\t\t\t//\n\t\t\t// If history and hash are both disabled, a hash may still\n\t\t\t// be added to the URL by clicking on a href with a hash\n\t\t\t// target. Counter this by always removing the hash.\n\t\t\t// else {\n\t\t\t// \twindow.history.replaceState( null, null, window.location.pathname + window.location.search );\n\t\t\t// }\n\n\t\t}\n\n\t}\n\n\treplaceState( url ) {\n\n\t\twindow.history.replaceState( null, null, url );\n\t\tthis.replaceStateTimestamp = Date.now();\n\n\t}\n\n\tdebouncedReplaceState( url ) {\n\n\t\tclearTimeout( this.replaceStateTimeout );\n\n\t\tif( Date.now() - this.replaceStateTimestamp > this.MAX_REPLACE_STATE_FREQUENCY ) {\n\t\t\tthis.replaceState( url );\n\t\t}\n\t\telse {\n\t\t\tthis.replaceStateTimeout = setTimeout( () => this.replaceState( url ), this.MAX_REPLACE_STATE_FREQUENCY );\n\t\t}\n\n\t}\n\n\t/**\n\t * Return a hash URL that will resolve to the given slide location.\n\t *\n\t * @param {HTMLElement} [slide=currentSlide] The slide to link to\n\t */\n\tgetHash( slide ) {\n\n\t\tlet url = '/';\n\n\t\t// Attempt to create a named link based on the slide's ID\n\t\tlet s = slide || this.Reveal.getCurrentSlide();\n\t\tlet id = s ? s.getAttribute( 'id' ) : null;\n\t\tif( id ) {\n\t\t\tid = encodeURIComponent( id );\n\t\t}\n\n\t\tlet index = this.Reveal.getIndices( slide );\n\t\tif( !this.Reveal.getConfig().fragmentInURL ) {\n\t\t\tindex.f = undefined;\n\t\t}\n\n\t\t// If the current slide has an ID, use that as a named link,\n\t\t// but we don't support named links with a fragment index\n\t\tif( typeof id === 'string' && id.length ) {\n\t\t\turl = '/' + id;\n\n\t\t\t// If there is also a fragment, append that at the end\n\t\t\t// of the named link, like: #/named-link/2\n\t\t\tif( index.f >= 0 ) url += '/' + index.f;\n\t\t}\n\t\t// Otherwise use the /h/v index\n\t\telse {\n\t\t\tlet hashIndexBase = this.Reveal.getConfig().hashOneBasedIndex ? 1 : 0;\n\t\t\tif( index.h > 0 || index.v > 0 || index.f >= 0 ) url += index.h + hashIndexBase;\n\t\t\tif( index.v > 0 || index.f >= 0 ) url += '/' + (index.v + hashIndexBase );\n\t\t\tif( index.f >= 0 ) url += '/' + index.f;\n\t\t}\n\n\t\treturn url;\n\n\t}\n\n\t/**\n\t * Handler for the window level 'hashchange' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tonWindowHashChange( event ) {\n\n\t\tthis.readURL();\n\n\t}\n\n}","import { queryAll, enterFullscreen } from '../utils/util.js'\nimport { isAndroid } from '../utils/device.js'\n\n/**\n * Manages our presentation controls. This includes both\n * the built-in control arrows as well as event monitoring\n * of any elements within the presentation with either of the\n * following helper classes:\n * - .navigate-up\n * - .navigate-right\n * - .navigate-down\n * - .navigate-left\n * - .navigate-next\n * - .navigate-prev\n * - .enter-fullscreen\n */\nexport default class Controls {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onNavigateLeftClicked = this.onNavigateLeftClicked.bind( this );\n\t\tthis.onNavigateRightClicked = this.onNavigateRightClicked.bind( this );\n\t\tthis.onNavigateUpClicked = this.onNavigateUpClicked.bind( this );\n\t\tthis.onNavigateDownClicked = this.onNavigateDownClicked.bind( this );\n\t\tthis.onNavigatePrevClicked = this.onNavigatePrevClicked.bind( this );\n\t\tthis.onNavigateNextClicked = this.onNavigateNextClicked.bind( this );\n\t\tthis.onEnterFullscreen = this.onEnterFullscreen.bind( this );\n\n\t}\n\n\trender() {\n\n\t\tconst rtl = this.Reveal.getConfig().rtl;\n\t\tconst revealElement = this.Reveal.getRevealElement();\n\n\t\tthis.element = document.createElement( 'aside' );\n\t\tthis.element.className = 'controls';\n\t\tthis.element.innerHTML =\n\t\t\t`<button class=\"navigate-left\" aria-label=\"${ rtl ? 'next slide' : 'previous slide' }\"><div class=\"controls-arrow\"></div></button>\n\t\t\t<button class=\"navigate-right\" aria-label=\"${ rtl ? 'previous slide' : 'next slide' }\"><div class=\"controls-arrow\"></div></button>\n\t\t\t<button class=\"navigate-up\" aria-label=\"above slide\"><div class=\"controls-arrow\"></div></button>\n\t\t\t<button class=\"navigate-down\" aria-label=\"below slide\"><div class=\"controls-arrow\"></div></button>`;\n\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t\t// There can be multiple instances of controls throughout the page\n\t\tthis.controlsLeft = queryAll( revealElement, '.navigate-left' );\n\t\tthis.controlsRight = queryAll( revealElement, '.navigate-right' );\n\t\tthis.controlsUp = queryAll( revealElement, '.navigate-up' );\n\t\tthis.controlsDown = queryAll( revealElement, '.navigate-down' );\n\t\tthis.controlsPrev = queryAll( revealElement, '.navigate-prev' );\n\t\tthis.controlsNext = queryAll( revealElement, '.navigate-next' );\n\t\tthis.controlsFullscreen = queryAll( revealElement, '.enter-fullscreen' );\n\n\t\t// The left, right and down arrows in the standard reveal.js controls\n\t\tthis.controlsRightArrow = this.element.querySelector( '.navigate-right' );\n\t\tthis.controlsLeftArrow = this.element.querySelector( '.navigate-left' );\n\t\tthis.controlsDownArrow = this.element.querySelector( '.navigate-down' );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tthis.element.style.display = config.controls ? 'block' : 'none';\n\n\t\tthis.element.setAttribute( 'data-controls-layout', config.controlsLayout );\n\t\tthis.element.setAttribute( 'data-controls-back-arrows', config.controlsBackArrows );\n\n\t}\n\n\tbind() {\n\n\t\t// Listen to both touch and click events, in case the device\n\t\t// supports both\n\t\tlet pointerEvents = [ 'touchstart', 'click' ];\n\n\t\t// Only support touch for Android, fixes double navigations in\n\t\t// stock browser\n\t\tif( isAndroid ) {\n\t\t\tpointerEvents = [ 'touchstart' ];\n\t\t}\n\n\t\tpointerEvents.forEach( eventName => {\n\t\t\tthis.controlsLeft.forEach( el => el.addEventListener( eventName, this.onNavigateLeftClicked, false ) );\n\t\t\tthis.controlsRight.forEach( el => el.addEventListener( eventName, this.onNavigateRightClicked, false ) );\n\t\t\tthis.controlsUp.forEach( el => el.addEventListener( eventName, this.onNavigateUpClicked, false ) );\n\t\t\tthis.controlsDown.forEach( el => el.addEventListener( eventName, this.onNavigateDownClicked, false ) );\n\t\t\tthis.controlsPrev.forEach( el => el.addEventListener( eventName, this.onNavigatePrevClicked, false ) );\n\t\t\tthis.controlsNext.forEach( el => el.addEventListener( eventName, this.onNavigateNextClicked, false ) );\n\t\t\tthis.controlsFullscreen.forEach( el => el.addEventListener( eventName, this.onEnterFullscreen, false ) );\n\t\t} );\n\n\t}\n\n\tunbind() {\n\n\t\t[ 'touchstart', 'click' ].forEach( eventName => {\n\t\t\tthis.controlsLeft.forEach( el => el.removeEventListener( eventName, this.onNavigateLeftClicked, false ) );\n\t\t\tthis.controlsRight.forEach( el => el.removeEventListener( eventName, this.onNavigateRightClicked, false ) );\n\t\t\tthis.controlsUp.forEach( el => el.removeEventListener( eventName, this.onNavigateUpClicked, false ) );\n\t\t\tthis.controlsDown.forEach( el => el.removeEventListener( eventName, this.onNavigateDownClicked, false ) );\n\t\t\tthis.controlsPrev.forEach( el => el.removeEventListener( eventName, this.onNavigatePrevClicked, false ) );\n\t\t\tthis.controlsNext.forEach( el => el.removeEventListener( eventName, this.onNavigateNextClicked, false ) );\n\t\t\tthis.controlsFullscreen.forEach( el => el.removeEventListener( eventName, this.onEnterFullscreen, false ) );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Updates the state of all control/navigation arrows.\n\t */\n\tupdate() {\n\n\t\tlet routes = this.Reveal.availableRoutes();\n\n\t\t// Remove the 'enabled' class from all directions\n\t\t[...this.controlsLeft, ...this.controlsRight, ...this.controlsUp, ...this.controlsDown, ...this.controlsPrev, ...this.controlsNext].forEach( node => {\n\t\t\tnode.classList.remove( 'enabled', 'fragmented' );\n\n\t\t\t// Set 'disabled' attribute on all directions\n\t\t\tnode.setAttribute( 'disabled', 'disabled' );\n\t\t} );\n\n\t\t// Add the 'enabled' class to the available routes; remove 'disabled' attribute to enable buttons\n\t\tif( routes.left ) this.controlsLeft.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\tif( routes.right ) this.controlsRight.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\tif( routes.up ) this.controlsUp.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\tif( routes.down ) this.controlsDown.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\n\t\t// Prev/next buttons\n\t\tif( routes.left || routes.up ) this.controlsPrev.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\tif( routes.right || routes.down ) this.controlsNext.forEach( el => { el.classList.add( 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\n\t\t// Highlight fragment directions\n\t\tlet currentSlide = this.Reveal.getCurrentSlide();\n\t\tif( currentSlide ) {\n\n\t\t\tlet fragmentsRoutes = this.Reveal.fragments.availableRoutes();\n\n\t\t\t// Always apply fragment decorator to prev/next buttons\n\t\t\tif( fragmentsRoutes.prev ) this.controlsPrev.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\tif( fragmentsRoutes.next ) this.controlsNext.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\n\t\t\t// Apply fragment decorators to directional buttons based on\n\t\t\t// what slide axis they are in\n\t\t\tif( this.Reveal.isVerticalSlide( currentSlide ) ) {\n\t\t\t\tif( fragmentsRoutes.prev ) this.controlsUp.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\t\tif( fragmentsRoutes.next ) this.controlsDown.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tif( fragmentsRoutes.prev ) this.controlsLeft.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\t\tif( fragmentsRoutes.next ) this.controlsRight.forEach( el => { el.classList.add( 'fragmented', 'enabled' ); el.removeAttribute( 'disabled' ); } );\n\t\t\t}\n\n\t\t}\n\n\t\tif( this.Reveal.getConfig().controlsTutorial ) {\n\n\t\t\tlet indices = this.Reveal.getIndices();\n\n\t\t\t// Highlight control arrows with an animation to ensure\n\t\t\t// that the viewer knows how to navigate\n\t\t\tif( !this.Reveal.hasNavigatedVertically() && routes.down ) {\n\t\t\t\tthis.controlsDownArrow.classList.add( 'highlight' );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tthis.controlsDownArrow.classList.remove( 'highlight' );\n\n\t\t\t\tif( this.Reveal.getConfig().rtl ) {\n\n\t\t\t\t\tif( !this.Reveal.hasNavigatedHorizontally() && routes.left && indices.v === 0 ) {\n\t\t\t\t\t\tthis.controlsLeftArrow.classList.add( 'highlight' );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.controlsLeftArrow.classList.remove( 'highlight' );\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tif( !this.Reveal.hasNavigatedHorizontally() && routes.right && indices.v === 0 ) {\n\t\t\t\t\t\tthis.controlsRightArrow.classList.add( 'highlight' );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.controlsRightArrow.classList.remove( 'highlight' );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\tdestroy() {\n\n\t\tthis.unbind();\n\t\tthis.element.remove();\n\n\t}\n\n\t/**\n\t * Event handlers for navigation control buttons.\n\t */\n\tonNavigateLeftClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tif( this.Reveal.getConfig().navigationMode === 'linear' ) {\n\t\t\tthis.Reveal.prev();\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.left();\n\t\t}\n\n\t}\n\n\tonNavigateRightClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tif( this.Reveal.getConfig().navigationMode === 'linear' ) {\n\t\t\tthis.Reveal.next();\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.right();\n\t\t}\n\n\t}\n\n\tonNavigateUpClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tthis.Reveal.up();\n\n\t}\n\n\tonNavigateDownClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tthis.Reveal.down();\n\n\t}\n\n\tonNavigatePrevClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tthis.Reveal.prev();\n\n\t}\n\n\tonNavigateNextClicked( event ) {\n\n\t\tevent.preventDefault();\n\t\tthis.Reveal.onUserInput();\n\n\t\tthis.Reveal.next();\n\n\t}\n\n\tonEnterFullscreen( event ) {\n\n\t\tconst config = this.Reveal.getConfig();\n\t\tconst viewport = this.Reveal.getViewportElement();\n\n\t\tenterFullscreen( config.embedded ? viewport : viewport.parentElement );\n\n\t}\n\n}","/**\n * Creates a visual progress bar for the presentation.\n */\nexport default class Progress {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onProgressClicked = this.onProgressClicked.bind( this );\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'progress';\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t\tthis.bar = document.createElement( 'span' );\n\t\tthis.element.appendChild( this.bar );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tthis.element.style.display = config.progress ? 'block' : 'none';\n\n\t}\n\n\tbind() {\n\n\t\tif( this.Reveal.getConfig().progress && this.element ) {\n\t\t\tthis.element.addEventListener( 'click', this.onProgressClicked, false );\n\t\t}\n\n\t}\n\n\tunbind() {\n\n\t\tif ( this.Reveal.getConfig().progress && this.element ) {\n\t\t\tthis.element.removeEventListener( 'click', this.onProgressClicked, false );\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates the progress bar to reflect the current slide.\n\t */\n\tupdate() {\n\n\t\t// Update progress if enabled\n\t\tif( this.Reveal.getConfig().progress && this.bar ) {\n\n\t\t\tlet scale = this.Reveal.getProgress();\n\n\t\t\t// Don't fill the progress bar if there's only one slide\n\t\t\tif( this.Reveal.getTotalSlides() < 2 ) {\n\t\t\t\tscale = 0;\n\t\t\t}\n\n\t\t\tthis.bar.style.transform = 'scaleX('+ scale +')';\n\n\t\t}\n\n\t}\n\n\tgetMaxWidth() {\n\n\t\treturn this.Reveal.getRevealElement().offsetWidth;\n\n\t}\n\n\t/**\n\t * Clicking on the progress bar results in a navigation to the\n\t * closest approximate horizontal slide using this equation:\n\t *\n\t * ( clickX / presentationWidth ) * numberOfSlides\n\t *\n\t * @param {object} event\n\t */\n\tonProgressClicked( event ) {\n\n\t\tthis.Reveal.onUserInput( event );\n\n\t\tevent.preventDefault();\n\n\t\tlet slides = this.Reveal.getSlides();\n\t\tlet slidesTotal = slides.length;\n\t\tlet slideIndex = Math.floor( ( event.clientX / this.getMaxWidth() ) * slidesTotal );\n\n\t\tif( this.Reveal.getConfig().rtl ) {\n\t\t\tslideIndex = slidesTotal - slideIndex;\n\t\t}\n\n\t\tlet targetIndices = this.Reveal.getIndices(slides[slideIndex]);\n\t\tthis.Reveal.slide( targetIndices.h, targetIndices.v );\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}","/**\n * Handles hiding of the pointer/cursor when inactive.\n */\nexport default class Pointer {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// Throttles mouse wheel navigation\n\t\tthis.lastMouseWheelStep = 0;\n\n\t\t// Is the mouse pointer currently hidden from view\n\t\tthis.cursorHidden = false;\n\n\t\t// Timeout used to determine when the cursor is inactive\n\t\tthis.cursorInactiveTimeout = 0;\n\n\t\tthis.onDocumentCursorActive = this.onDocumentCursorActive.bind( this );\n\t\tthis.onDocumentMouseScroll = this.onDocumentMouseScroll.bind( this );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.mouseWheel ) {\n\t\t\tdocument.addEventListener( 'wheel', this.onDocumentMouseScroll, false );\n\t\t}\n\t\telse {\n\t\t\tdocument.removeEventListener( 'wheel', this.onDocumentMouseScroll, false );\n\t\t}\n\n\t\t// Auto-hide the mouse pointer when its inactive\n\t\tif( config.hideInactiveCursor ) {\n\t\t\tdocument.addEventListener( 'mousemove', this.onDocumentCursorActive, false );\n\t\t\tdocument.addEventListener( 'mousedown', this.onDocumentCursorActive, false );\n\t\t}\n\t\telse {\n\t\t\tthis.showCursor();\n\n\t\t\tdocument.removeEventListener( 'mousemove', this.onDocumentCursorActive, false );\n\t\t\tdocument.removeEventListener( 'mousedown', this.onDocumentCursorActive, false );\n\t\t}\n\n\t}\n\n\t/**\n\t * Shows the mouse pointer after it has been hidden with\n\t * #hideCursor.\n\t */\n\tshowCursor() {\n\n\t\tif( this.cursorHidden ) {\n\t\t\tthis.cursorHidden = false;\n\t\t\tthis.Reveal.getRevealElement().style.cursor = '';\n\t\t}\n\n\t}\n\n\t/**\n\t * Hides the mouse pointer when it's on top of the .reveal\n\t * container.\n\t */\n\thideCursor() {\n\n\t\tif( this.cursorHidden === false ) {\n\t\t\tthis.cursorHidden = true;\n\t\t\tthis.Reveal.getRevealElement().style.cursor = 'none';\n\t\t}\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.showCursor();\n\n\t\tdocument.removeEventListener( 'wheel', this.onDocumentMouseScroll, false );\n\t\tdocument.removeEventListener( 'mousemove', this.onDocumentCursorActive, false );\n\t\tdocument.removeEventListener( 'mousedown', this.onDocumentCursorActive, false );\n\n\t}\n\n\t/**\n\t * Called whenever there is mouse input at the document level\n\t * to determine if the cursor is active or not.\n\t *\n\t * @param {object} event\n\t */\n\tonDocumentCursorActive( event ) {\n\n\t\tthis.showCursor();\n\n\t\tclearTimeout( this.cursorInactiveTimeout );\n\n\t\tthis.cursorInactiveTimeout = setTimeout( this.hideCursor.bind( this ), this.Reveal.getConfig().hideCursorTime );\n\n\t}\n\n\t/**\n\t * Handles mouse wheel scrolling, throttled to avoid skipping\n\t * multiple slides.\n\t *\n\t * @param {object} event\n\t */\n\tonDocumentMouseScroll( event ) {\n\n\t\tif( Date.now() - this.lastMouseWheelStep > 1000 ) {\n\n\t\t\tthis.lastMouseWheelStep = Date.now();\n\n\t\t\tlet delta = event.detail || -event.wheelDelta;\n\t\t\tif( delta > 0 ) {\n\t\t\t\tthis.Reveal.next();\n\t\t\t}\n\t\t\telse if( delta < 0 ) {\n\t\t\t\tthis.Reveal.prev();\n\t\t\t}\n\n\t\t}\n\n\t}\n\n}\n","/**\n * Loads a JavaScript file from the given URL and executes it.\n *\n * @param {string} url Address of the .js file to load\n * @param {function} callback Method to invoke when the script\n * has loaded and executed\n */\nexport const loadScript = ( url, callback ) => {\n\n\tconst script = document.createElement( 'script' );\n\tscript.type = 'text/javascript';\n\tscript.async = false;\n\tscript.defer = false;\n\tscript.src = url;\n\n\tif( typeof callback === 'function' ) {\n\n\t\t// Success callback\n\t\tscript.onload = script.onreadystatechange = event => {\n\t\t\tif( event.type === 'load' || /loaded|complete/.test( script.readyState ) ) {\n\n\t\t\t\t// Kill event listeners\n\t\t\t\tscript.onload = script.onreadystatechange = script.onerror = null;\n\n\t\t\t\tcallback();\n\n\t\t\t}\n\t\t};\n\n\t\t// Error callback\n\t\tscript.onerror = err => {\n\n\t\t\t// Kill event listeners\n\t\t\tscript.onload = script.onreadystatechange = script.onerror = null;\n\n\t\t\tcallback( new Error( 'Failed loading script: ' + script.src + '\\n' + err ) );\n\n\t\t};\n\n\t}\n\n\t// Append the script at the end of <head>\n\tconst head = document.querySelector( 'head' );\n\thead.insertBefore( script, head.lastChild );\n\n}","import { loadScript } from '../utils/loader.js'\n\n/**\n * Manages loading and registering of reveal.js plugins.\n */\nexport default class Plugins {\n\n\tconstructor( reveal ) {\n\n\t\tthis.Reveal = reveal;\n\n\t\t// Flags our current state (idle -> loading -> loaded)\n\t\tthis.state = 'idle';\n\n\t\t// An id:instance map of currently registered plugins\n\t\tthis.registeredPlugins = {};\n\n\t\tthis.asyncDependencies = [];\n\n\t}\n\n\t/**\n\t * Loads reveal.js dependencies, registers and\n\t * initializes plugins.\n\t *\n\t * Plugins are direct references to a reveal.js plugin\n\t * object that we register and initialize after any\n\t * synchronous dependencies have loaded.\n\t *\n\t * Dependencies are defined via the 'dependencies' config\n\t * option and will be loaded prior to starting reveal.js.\n\t * Some dependencies may have an 'async' flag, if so they\n\t * will load after reveal.js has been started up.\n\t */\n\tload( plugins, dependencies ) {\n\n\t\tthis.state = 'loading';\n\n\t\tplugins.forEach( this.registerPlugin.bind( this ) );\n\n\t\treturn new Promise( resolve => {\n\n\t\t\tlet scripts = [],\n\t\t\t\tscriptsToLoad = 0;\n\n\t\t\tdependencies.forEach( s => {\n\t\t\t\t// Load if there's no condition or the condition is truthy\n\t\t\t\tif( !s.condition || s.condition() ) {\n\t\t\t\t\tif( s.async ) {\n\t\t\t\t\t\tthis.asyncDependencies.push( s );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tscripts.push( s );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} );\n\n\t\t\tif( scripts.length ) {\n\t\t\t\tscriptsToLoad = scripts.length;\n\n\t\t\t\tconst scriptLoadedCallback = (s) => {\n\t\t\t\t\tif( s && typeof s.callback === 'function' ) s.callback();\n\n\t\t\t\t\tif( --scriptsToLoad === 0 ) {\n\t\t\t\t\t\tthis.initPlugins().then( resolve );\n\t\t\t\t\t}\n\t\t\t\t};\n\n\t\t\t\t// Load synchronous scripts\n\t\t\t\tscripts.forEach( s => {\n\t\t\t\t\tif( typeof s.id === 'string' ) {\n\t\t\t\t\t\tthis.registerPlugin( s );\n\t\t\t\t\t\tscriptLoadedCallback( s );\n\t\t\t\t\t}\n\t\t\t\t\telse if( typeof s.src === 'string' ) {\n\t\t\t\t\t\tloadScript( s.src, () => scriptLoadedCallback(s) );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tconsole.warn( 'Unrecognized plugin format', s );\n\t\t\t\t\t\tscriptLoadedCallback();\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tthis.initPlugins().then( resolve );\n\t\t\t}\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Initializes our plugins and waits for them to be ready\n\t * before proceeding.\n\t */\n\tinitPlugins() {\n\n\t\treturn new Promise( resolve => {\n\n\t\t\tlet pluginValues = Object.values( this.registeredPlugins );\n\t\t\tlet pluginsToInitialize = pluginValues.length;\n\n\t\t\t// If there are no plugins, skip this step\n\t\t\tif( pluginsToInitialize === 0 ) {\n\t\t\t\tthis.loadAsync().then( resolve );\n\t\t\t}\n\t\t\t// ... otherwise initialize plugins\n\t\t\telse {\n\n\t\t\t\tlet initNextPlugin;\n\n\t\t\t\tlet afterPlugInitialized = () => {\n\t\t\t\t\tif( --pluginsToInitialize === 0 ) {\n\t\t\t\t\t\tthis.loadAsync().then( resolve );\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tinitNextPlugin();\n\t\t\t\t\t}\n\t\t\t\t};\n\n\t\t\t\tlet i = 0;\n\n\t\t\t\t// Initialize plugins serially\n\t\t\t\tinitNextPlugin = () => {\n\n\t\t\t\t\tlet plugin = pluginValues[i++];\n\n\t\t\t\t\t// If the plugin has an 'init' method, invoke it\n\t\t\t\t\tif( typeof plugin.init === 'function' ) {\n\t\t\t\t\t\tlet promise = plugin.init( this.Reveal );\n\n\t\t\t\t\t\t// If the plugin returned a Promise, wait for it\n\t\t\t\t\t\tif( promise && typeof promise.then === 'function' ) {\n\t\t\t\t\t\t\tpromise.then( afterPlugInitialized );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tafterPlugInitialized();\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tafterPlugInitialized();\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tinitNextPlugin();\n\n\t\t\t}\n\n\t\t} )\n\n\t}\n\n\t/**\n\t * Loads all async reveal.js dependencies.\n\t */\n\tloadAsync() {\n\n\t\tthis.state = 'loaded';\n\n\t\tif( this.asyncDependencies.length ) {\n\t\t\tthis.asyncDependencies.forEach( s => {\n\t\t\t\tloadScript( s.src, s.callback );\n\t\t\t} );\n\t\t}\n\n\t\treturn Promise.resolve();\n\n\t}\n\n\t/**\n\t * Registers a new plugin with this reveal.js instance.\n\t *\n\t * reveal.js waits for all registered plugins to initialize\n\t * before considering itself ready, as long as the plugin\n\t * is registered before calling `Reveal.initialize()`.\n\t */\n\tregisterPlugin( plugin ) {\n\n\t\t// Backwards compatibility to make reveal.js ~3.9.0\n\t\t// plugins work with reveal.js 4.0.0\n\t\tif( arguments.length === 2 && typeof arguments[0] === 'string' ) {\n\t\t\tplugin = arguments[1];\n\t\t\tplugin.id = arguments[0];\n\t\t}\n\t\t// Plugin can optionally be a function which we call\n\t\t// to create an instance of the plugin\n\t\telse if( typeof plugin === 'function' ) {\n\t\t\tplugin = plugin();\n\t\t}\n\n\t\tlet id = plugin.id;\n\n\t\tif( typeof id !== 'string' ) {\n\t\t\tconsole.warn( 'Unrecognized plugin format; can\\'t find plugin.id', plugin );\n\t\t}\n\t\telse if( this.registeredPlugins[id] === undefined ) {\n\t\t\tthis.registeredPlugins[id] = plugin;\n\n\t\t\t// If a plugin is registered after reveal.js is loaded,\n\t\t\t// initialize it right away\n\t\t\tif( this.state === 'loaded' && typeof plugin.init === 'function' ) {\n\t\t\t\tplugin.init( this.Reveal );\n\t\t\t}\n\t\t}\n\t\telse {\n\t\t\tconsole.warn( 'reveal.js: \"'+ id +'\" plugin has already been registered' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if a specific plugin has been registered.\n\t *\n\t * @param {String} id Unique plugin identifier\n\t */\n\thasPlugin( id ) {\n\n\t\treturn !!this.registeredPlugins[id];\n\n\t}\n\n\t/**\n\t * Returns the specific plugin instance, if a plugin\n\t * with the given ID has been registered.\n\t *\n\t * @param {String} id Unique plugin identifier\n\t */\n\tgetPlugin( id ) {\n\n\t\treturn this.registeredPlugins[id];\n\n\t}\n\n\tgetRegisteredPlugins() {\n\n\t\treturn this.registeredPlugins;\n\n\t}\n\n\tdestroy() {\n\n\t\tObject.values( this.registeredPlugins ).forEach( plugin => {\n\t\t\tif( typeof plugin.destroy === 'function' ) {\n\t\t\t\tplugin.destroy();\n\t\t\t}\n\t\t} );\n\n\t\tthis.registeredPlugins = {};\n\t\tthis.asyncDependencies = [];\n\n\t}\n\n}\n","import { isAndroid } from '../utils/device.js'\nimport { matches } from '../utils/util.js'\n\nconst SWIPE_THRESHOLD = 40;\n\n/**\n * Controls all touch interactions and navigations for\n * a presentation.\n */\nexport default class Touch {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\t// Holds information about the currently ongoing touch interaction\n\t\tthis.touchStartX = 0;\n\t\tthis.touchStartY = 0;\n\t\tthis.touchStartCount = 0;\n\t\tthis.touchCaptured = false;\n\n\t\tthis.onPointerDown = this.onPointerDown.bind( this );\n\t\tthis.onPointerMove = this.onPointerMove.bind( this );\n\t\tthis.onPointerUp = this.onPointerUp.bind( this );\n\t\tthis.onTouchStart = this.onTouchStart.bind( this );\n\t\tthis.onTouchMove = this.onTouchMove.bind( this );\n\t\tthis.onTouchEnd = this.onTouchEnd.bind( this );\n\n\t}\n\n\t/**\n\t *\n\t */\n\tbind() {\n\n\t\tlet revealElement = this.Reveal.getRevealElement();\n\n\t\tif( 'onpointerdown' in window ) {\n\t\t\t// Use W3C pointer events\n\t\t\trevealElement.addEventListener( 'pointerdown', this.onPointerDown, false );\n\t\t\trevealElement.addEventListener( 'pointermove', this.onPointerMove, false );\n\t\t\trevealElement.addEventListener( 'pointerup', this.onPointerUp, false );\n\t\t}\n\t\telse if( window.navigator.msPointerEnabled ) {\n\t\t\t// IE 10 uses prefixed version of pointer events\n\t\t\trevealElement.addEventListener( 'MSPointerDown', this.onPointerDown, false );\n\t\t\trevealElement.addEventListener( 'MSPointerMove', this.onPointerMove, false );\n\t\t\trevealElement.addEventListener( 'MSPointerUp', this.onPointerUp, false );\n\t\t}\n\t\telse {\n\t\t\t// Fall back to touch events\n\t\t\trevealElement.addEventListener( 'touchstart', this.onTouchStart, false );\n\t\t\trevealElement.addEventListener( 'touchmove', this.onTouchMove, false );\n\t\t\trevealElement.addEventListener( 'touchend', this.onTouchEnd, false );\n\t\t}\n\n\t}\n\n\t/**\n\t *\n\t */\n\tunbind() {\n\n\t\tlet revealElement = this.Reveal.getRevealElement();\n\n\t\trevealElement.removeEventListener( 'pointerdown', this.onPointerDown, false );\n\t\trevealElement.removeEventListener( 'pointermove', this.onPointerMove, false );\n\t\trevealElement.removeEventListener( 'pointerup', this.onPointerUp, false );\n\n\t\trevealElement.removeEventListener( 'MSPointerDown', this.onPointerDown, false );\n\t\trevealElement.removeEventListener( 'MSPointerMove', this.onPointerMove, false );\n\t\trevealElement.removeEventListener( 'MSPointerUp', this.onPointerUp, false );\n\n\t\trevealElement.removeEventListener( 'touchstart', this.onTouchStart, false );\n\t\trevealElement.removeEventListener( 'touchmove', this.onTouchMove, false );\n\t\trevealElement.removeEventListener( 'touchend', this.onTouchEnd, false );\n\n\t}\n\n\t/**\n\t * Checks if the target element prevents the triggering of\n\t * swipe navigation.\n\t */\n\tisSwipePrevented( target ) {\n\n\t\t// Prevent accidental swipes when scrubbing timelines\n\t\tif( matches( target, 'video[controls], audio[controls]' ) ) return true;\n\n\t\twhile( target && typeof target.hasAttribute === 'function' ) {\n\t\t\tif( target.hasAttribute( 'data-prevent-swipe' ) ) return true;\n\t\t\ttarget = target.parentNode;\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Handler for the 'touchstart' event, enables support for\n\t * swipe and pinch gestures.\n\t *\n\t * @param {object} event\n\t */\n\tonTouchStart( event ) {\n\n\t\tthis.touchCaptured = false;\n\n\t\tif( this.isSwipePrevented( event.target ) ) return true;\n\n\t\tthis.touchStartX = event.touches[0].clientX;\n\t\tthis.touchStartY = event.touches[0].clientY;\n\t\tthis.touchStartCount = event.touches.length;\n\n\t}\n\n\t/**\n\t * Handler for the 'touchmove' event.\n\t *\n\t * @param {object} event\n\t */\n\tonTouchMove( event ) {\n\n\t\tif( this.isSwipePrevented( event.target ) ) return true;\n\n\t\tlet config = this.Reveal.getConfig();\n\n\t\t// Each touch should only trigger one action\n\t\tif( !this.touchCaptured ) {\n\t\t\tthis.Reveal.onUserInput( event );\n\n\t\t\tlet currentX = event.touches[0].clientX;\n\t\t\tlet currentY = event.touches[0].clientY;\n\n\t\t\t// There was only one touch point, look for a swipe\n\t\t\tif( event.touches.length === 1 && this.touchStartCount !== 2 ) {\n\n\t\t\t\tlet availableRoutes = this.Reveal.availableRoutes({ includeFragments: true });\n\n\t\t\t\tlet deltaX = currentX - this.touchStartX,\n\t\t\t\t\tdeltaY = currentY - this.touchStartY;\n\n\t\t\t\tif( deltaX > SWIPE_THRESHOLD && Math.abs( deltaX ) > Math.abs( deltaY ) ) {\n\t\t\t\t\tthis.touchCaptured = true;\n\t\t\t\t\tif( config.navigationMode === 'linear' ) {\n\t\t\t\t\t\tif( config.rtl ) {\n\t\t\t\t\t\t\tthis.Reveal.next();\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tthis.Reveal.prev();\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.left();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if( deltaX < -SWIPE_THRESHOLD && Math.abs( deltaX ) > Math.abs( deltaY ) ) {\n\t\t\t\t\tthis.touchCaptured = true;\n\t\t\t\t\tif( config.navigationMode === 'linear' ) {\n\t\t\t\t\t\tif( config.rtl ) {\n\t\t\t\t\t\t\tthis.Reveal.prev();\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tthis.Reveal.next();\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.right();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if( deltaY > SWIPE_THRESHOLD && availableRoutes.up ) {\n\t\t\t\t\tthis.touchCaptured = true;\n\t\t\t\t\tif( config.navigationMode === 'linear' ) {\n\t\t\t\t\t\tthis.Reveal.prev();\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.up();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if( deltaY < -SWIPE_THRESHOLD && availableRoutes.down ) {\n\t\t\t\t\tthis.touchCaptured = true;\n\t\t\t\t\tif( config.navigationMode === 'linear' ) {\n\t\t\t\t\t\tthis.Reveal.next();\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tthis.Reveal.down();\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// If we're embedded, only block touch events if they have\n\t\t\t\t// triggered an action\n\t\t\t\tif( config.embedded ) {\n\t\t\t\t\tif( this.touchCaptured || this.Reveal.isVerticalSlide() ) {\n\t\t\t\t\t\tevent.preventDefault();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t// Not embedded? Block them all to avoid needless tossing\n\t\t\t\t// around of the viewport in iOS\n\t\t\t\telse {\n\t\t\t\t\tevent.preventDefault();\n\t\t\t\t}\n\n\t\t\t}\n\t\t}\n\t\t// There's a bug with swiping on some Android devices unless\n\t\t// the default action is always prevented\n\t\telse if( isAndroid ) {\n\t\t\tevent.preventDefault();\n\t\t}\n\n\t}\n\n\t/**\n\t * Handler for the 'touchend' event.\n\t *\n\t * @param {object} event\n\t */\n\tonTouchEnd( event ) {\n\n\t\tthis.touchCaptured = false;\n\n\t}\n\n\t/**\n\t * Convert pointer down to touch start.\n\t *\n\t * @param {object} event\n\t */\n\tonPointerDown( event ) {\n\n\t\tif( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === \"touch\" ) {\n\t\t\tevent.touches = [{ clientX: event.clientX, clientY: event.clientY }];\n\t\t\tthis.onTouchStart( event );\n\t\t}\n\n\t}\n\n\t/**\n\t * Convert pointer move to touch move.\n\t *\n\t * @param {object} event\n\t */\n\tonPointerMove( event ) {\n\n\t\tif( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === \"touch\" ) {\n\t\t\tevent.touches = [{ clientX: event.clientX, clientY: event.clientY }];\n\t\t\tthis.onTouchMove( event );\n\t\t}\n\n\t}\n\n\t/**\n\t * Convert pointer up to touch end.\n\t *\n\t * @param {object} event\n\t */\n\tonPointerUp( event ) {\n\n\t\tif( event.pointerType === event.MSPOINTER_TYPE_TOUCH || event.pointerType === \"touch\" ) {\n\t\t\tevent.touches = [{ clientX: event.clientX, clientY: event.clientY }];\n\t\t\tthis.onTouchEnd( event );\n\t\t}\n\n\t}\n\n}","import { closest } from '../utils/util.js'\n\n/**\n * Manages focus when a presentation is embedded. This\n * helps us only capture keyboard from the presentation\n * a user is currently interacting with in a page where\n * multiple presentations are embedded.\n */\n\nconst STATE_FOCUS = 'focus';\nconst STATE_BLUR = 'blur';\n\nexport default class Focus {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t\tthis.onRevealPointerDown = this.onRevealPointerDown.bind( this );\n\t\tthis.onDocumentPointerDown = this.onDocumentPointerDown.bind( this );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.embedded ) {\n\t\t\tthis.blur();\n\t\t}\n\t\telse {\n\t\t\tthis.focus();\n\t\t\tthis.unbind();\n\t\t}\n\n\t}\n\n\tbind() {\n\n\t\tif( this.Reveal.getConfig().embedded ) {\n\t\t\tthis.Reveal.getRevealElement().addEventListener( 'pointerdown', this.onRevealPointerDown, false );\n\t\t}\n\n\t}\n\n\tunbind() {\n\n\t\tthis.Reveal.getRevealElement().removeEventListener( 'pointerdown', this.onRevealPointerDown, false );\n\t\tdocument.removeEventListener( 'pointerdown', this.onDocumentPointerDown, false );\n\n\t}\n\n\tfocus() {\n\n\t\tif( this.state !== STATE_FOCUS ) {\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'focused' );\n\t\t\tdocument.addEventListener( 'pointerdown', this.onDocumentPointerDown, false );\n\t\t}\n\n\t\tthis.state = STATE_FOCUS;\n\n\t}\n\n\tblur() {\n\n\t\tif( this.state !== STATE_BLUR ) {\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'focused' );\n\t\t\tdocument.removeEventListener( 'pointerdown', this.onDocumentPointerDown, false );\n\t\t}\n\n\t\tthis.state = STATE_BLUR;\n\n\t}\n\n\tisFocused() {\n\n\t\treturn this.state === STATE_FOCUS;\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.Reveal.getRevealElement().classList.remove( 'focused' );\n\n\t}\n\n\tonRevealPointerDown( event ) {\n\n\t\tthis.focus();\n\n\t}\n\n\tonDocumentPointerDown( event ) {\n\n\t\tlet revealElement = closest( event.target, '.reveal' );\n\t\tif( !revealElement || revealElement !== this.Reveal.getRevealElement() ) {\n\t\t\tthis.blur();\n\t\t}\n\n\t}\n\n}","/**\n * Handles the showing of speaker notes\n */\nexport default class Notes {\n\n\tconstructor( Reveal ) {\n\n\t\tthis.Reveal = Reveal;\n\n\t}\n\n\trender() {\n\n\t\tthis.element = document.createElement( 'div' );\n\t\tthis.element.className = 'speaker-notes';\n\t\tthis.element.setAttribute( 'data-prevent-swipe', '' );\n\t\tthis.element.setAttribute( 'tabindex', '0' );\n\t\tthis.Reveal.getRevealElement().appendChild( this.element );\n\n\t}\n\n\t/**\n\t * Called when the reveal.js config is updated.\n\t */\n\tconfigure( config, oldConfig ) {\n\n\t\tif( config.showNotes ) {\n\t\t\tthis.element.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Pick up notes from the current slide and display them\n\t * to the viewer.\n\t *\n\t * @see {@link config.showNotes}\n\t */\n\tupdate() {\n\n\t\tif( this.Reveal.getConfig().showNotes &&\n\t\t\tthis.element && this.Reveal.getCurrentSlide() &&\n\t\t\t!this.Reveal.isScrollView() &&\n\t\t\t!this.Reveal.isPrintView()\n\t\t) {\n\t\t\tthis.element.innerHTML = this.getSlideNotes() || '<span class=\"notes-placeholder\">No notes on this slide.</span>';\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates the visibility of the speaker notes sidebar that\n\t * is used to share annotated slides. The notes sidebar is\n\t * only visible if showNotes is true and there are notes on\n\t * one or more slides in the deck.\n\t */\n\tupdateVisibility() {\n\n\t\tif( this.Reveal.getConfig().showNotes &&\n\t\t\tthis.hasNotes() &&\n\t\t\t!this.Reveal.isScrollView() &&\n\t\t\t!this.Reveal.isPrintView()\n\t\t) {\n\t\t\tthis.Reveal.getRevealElement().classList.add( 'show-notes' );\n\t\t}\n\t\telse {\n\t\t\tthis.Reveal.getRevealElement().classList.remove( 'show-notes' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if there are speaker notes for ANY slide in the\n\t * presentation.\n\t */\n\thasNotes() {\n\n\t\treturn this.Reveal.getSlidesElement().querySelectorAll( '[data-notes], aside.notes' ).length > 0;\n\n\t}\n\n\t/**\n\t * Checks if this presentation is running inside of the\n\t * speaker notes window.\n\t *\n\t * @return {boolean}\n\t */\n\tisSpeakerNotesWindow() {\n\n\t\treturn !!window.location.search.match( /receiver/gi );\n\n\t}\n\n\t/**\n\t * Retrieves the speaker notes from a slide. Notes can be\n\t * defined in two ways:\n\t * 1. As a data-notes attribute on the slide <section>\n\t * 2. With <aside class=\"notes\"> elements inside the slide\n\t *\n\t * @param {HTMLElement} [slide=currentSlide]\n\t * @return {(string|null)}\n\t */\n\tgetSlideNotes( slide = this.Reveal.getCurrentSlide() ) {\n\n\t\t// Notes can be specified via the data-notes attribute...\n\t\tif( slide.hasAttribute( 'data-notes' ) ) {\n\t\t\treturn slide.getAttribute( 'data-notes' );\n\t\t}\n\n\t\t// ... or using <aside class=\"notes\"> elements\n\t\tlet notesElements = slide.querySelectorAll( 'aside.notes' );\n\t\tif( notesElements ) {\n\t\t\treturn Array.from(notesElements).map( notesElement => notesElement.innerHTML ).join( '\\n' );\n\t\t}\n\n\t\treturn null;\n\n\t}\n\n\tdestroy() {\n\n\t\tthis.element.remove();\n\n\t}\n\n}","/**\n * UI component that lets the use control auto-slide\n * playback via play/pause.\n */\nexport default class Playback {\n\n\t/**\n\t * @param {HTMLElement} container The component will append\n\t * itself to this\n\t * @param {function} progressCheck A method which will be\n\t * called frequently to get the current playback progress on\n\t * a range of 0-1\n\t */\n\tconstructor( container, progressCheck ) {\n\n\t\t// Cosmetics\n\t\tthis.diameter = 100;\n\t\tthis.diameter2 = this.diameter/2;\n\t\tthis.thickness = 6;\n\n\t\t// Flags if we are currently playing\n\t\tthis.playing = false;\n\n\t\t// Current progress on a 0-1 range\n\t\tthis.progress = 0;\n\n\t\t// Used to loop the animation smoothly\n\t\tthis.progressOffset = 1;\n\n\t\tthis.container = container;\n\t\tthis.progressCheck = progressCheck;\n\n\t\tthis.canvas = document.createElement( 'canvas' );\n\t\tthis.canvas.className = 'playback';\n\t\tthis.canvas.width = this.diameter;\n\t\tthis.canvas.height = this.diameter;\n\t\tthis.canvas.style.width = this.diameter2 + 'px';\n\t\tthis.canvas.style.height = this.diameter2 + 'px';\n\t\tthis.context = this.canvas.getContext( '2d' );\n\n\t\tthis.container.appendChild( this.canvas );\n\n\t\tthis.render();\n\n\t}\n\n\tsetPlaying( value ) {\n\n\t\tconst wasPlaying = this.playing;\n\n\t\tthis.playing = value;\n\n\t\t// Start repainting if we weren't already\n\t\tif( !wasPlaying && this.playing ) {\n\t\t\tthis.animate();\n\t\t}\n\t\telse {\n\t\t\tthis.render();\n\t\t}\n\n\t}\n\n\tanimate() {\n\n\t\tconst progressBefore = this.progress;\n\n\t\tthis.progress = this.progressCheck();\n\n\t\t// When we loop, offset the progress so that it eases\n\t\t// smoothly rather than immediately resetting\n\t\tif( progressBefore > 0.8 && this.progress < 0.2 ) {\n\t\t\tthis.progressOffset = this.progress;\n\t\t}\n\n\t\tthis.render();\n\n\t\tif( this.playing ) {\n\t\t\trequestAnimationFrame( this.animate.bind( this ) );\n\t\t}\n\n\t}\n\n\t/**\n\t * Renders the current progress and playback state.\n\t */\n\trender() {\n\n\t\tlet progress = this.playing ? this.progress : 0,\n\t\t\tradius = ( this.diameter2 ) - this.thickness,\n\t\t\tx = this.diameter2,\n\t\t\ty = this.diameter2,\n\t\t\ticonSize = 28;\n\n\t\t// Ease towards 1\n\t\tthis.progressOffset += ( 1 - this.progressOffset ) * 0.1;\n\n\t\tconst endAngle = ( - Math.PI / 2 ) + ( progress * ( Math.PI * 2 ) );\n\t\tconst startAngle = ( - Math.PI / 2 ) + ( this.progressOffset * ( Math.PI * 2 ) );\n\n\t\tthis.context.save();\n\t\tthis.context.clearRect( 0, 0, this.diameter, this.diameter );\n\n\t\t// Solid background color\n\t\tthis.context.beginPath();\n\t\tthis.context.arc( x, y, radius + 4, 0, Math.PI * 2, false );\n\t\tthis.context.fillStyle = 'rgba( 0, 0, 0, 0.4 )';\n\t\tthis.context.fill();\n\n\t\t// Draw progress track\n\t\tthis.context.beginPath();\n\t\tthis.context.arc( x, y, radius, 0, Math.PI * 2, false );\n\t\tthis.context.lineWidth = this.thickness;\n\t\tthis.context.strokeStyle = 'rgba( 255, 255, 255, 0.2 )';\n\t\tthis.context.stroke();\n\n\t\tif( this.playing ) {\n\t\t\t// Draw progress on top of track\n\t\t\tthis.context.beginPath();\n\t\t\tthis.context.arc( x, y, radius, startAngle, endAngle, false );\n\t\t\tthis.context.lineWidth = this.thickness;\n\t\t\tthis.context.strokeStyle = '#fff';\n\t\t\tthis.context.stroke();\n\t\t}\n\n\t\tthis.context.translate( x - ( iconSize / 2 ), y - ( iconSize / 2 ) );\n\n\t\t// Draw play/pause icons\n\t\tif( this.playing ) {\n\t\t\tthis.context.fillStyle = '#fff';\n\t\t\tthis.context.fillRect( 0, 0, iconSize / 2 - 4, iconSize );\n\t\t\tthis.context.fillRect( iconSize / 2 + 4, 0, iconSize / 2 - 4, iconSize );\n\t\t}\n\t\telse {\n\t\t\tthis.context.beginPath();\n\t\t\tthis.context.translate( 4, 0 );\n\t\t\tthis.context.moveTo( 0, 0 );\n\t\t\tthis.context.lineTo( iconSize - 4, iconSize / 2 );\n\t\t\tthis.context.lineTo( 0, iconSize );\n\t\t\tthis.context.fillStyle = '#fff';\n\t\t\tthis.context.fill();\n\t\t}\n\n\t\tthis.context.restore();\n\n\t}\n\n\ton( type, listener ) {\n\t\tthis.canvas.addEventListener( type, listener, false );\n\t}\n\n\toff( type, listener ) {\n\t\tthis.canvas.removeEventListener( type, listener, false );\n\t}\n\n\tdestroy() {\n\n\t\tthis.playing = false;\n\n\t\tif( this.canvas.parentNode ) {\n\t\t\tthis.container.removeChild( this.canvas );\n\t\t}\n\n\t}\n\n}","/**\n * The default reveal.js config object.\n */\nexport default {\n\n\t// The \"normal\" size of the presentation, aspect ratio will be preserved\n\t// when the presentation is scaled to fit different resolutions\n\twidth: 960,\n\theight: 700,\n\n\t// Factor of the display size that should remain empty around the content\n\tmargin: 0.04,\n\n\t// Bounds for smallest/largest possible scale to apply to content\n\tminScale: 0.2,\n\tmaxScale: 2.0,\n\n\t// Display presentation control arrows\n\tcontrols: true,\n\n\t// Help the user learn the controls by providing hints, for example by\n\t// bouncing the down arrow when they first encounter a vertical slide\n\tcontrolsTutorial: true,\n\n\t// Determines where controls appear, \"edges\" or \"bottom-right\"\n\tcontrolsLayout: 'bottom-right',\n\n\t// Visibility rule for backwards navigation arrows; \"faded\", \"hidden\"\n\t// or \"visible\"\n\tcontrolsBackArrows: 'faded',\n\n\t// Display a presentation progress bar\n\tprogress: true,\n\n\t// Display the page number of the current slide\n\t// - true: Show slide number\n\t// - false: Hide slide number\n\t//\n\t// Can optionally be set as a string that specifies the number formatting:\n\t// - \"h.v\":\t Horizontal . vertical slide number (default)\n\t// - \"h/v\":\t Horizontal / vertical slide number\n\t// - \"c\":\t Flattened slide number\n\t// - \"c/t\":\t Flattened slide number / total slides\n\t//\n\t// Alternatively, you can provide a function that returns the slide\n\t// number for the current slide. The function should take in a slide\n\t// object and return an array with one string [slideNumber] or\n\t// three strings [n1,delimiter,n2]. See #formatSlideNumber().\n\tslideNumber: false,\n\n\t// Can be used to limit the contexts in which the slide number appears\n\t// - \"all\": Always show the slide number\n\t// - \"print\": Only when printing to PDF\n\t// - \"speaker\": Only in the speaker view\n\tshowSlideNumber: 'all',\n\n\t// Use 1 based indexing for # links to match slide number (default is zero\n\t// based)\n\thashOneBasedIndex: false,\n\n\t// Add the current slide number to the URL hash so that reloading the\n\t// page/copying the URL will return you to the same slide\n\thash: false,\n\n\t// Flags if we should monitor the hash and change slides accordingly\n\trespondToHashChanges: true,\n\n\t// Enable support for jump-to-slide navigation shortcuts\n\tjumpToSlide: true,\n\n\t// Push each slide change to the browser history. Implies `hash: true`\n\thistory: false,\n\n\t// Enable keyboard shortcuts for navigation\n\tkeyboard: true,\n\n\t// Optional function that blocks keyboard events when retuning false\n\t//\n\t// If you set this to 'focused', we will only capture keyboard events\n\t// for embedded decks when they are in focus\n\tkeyboardCondition: null,\n\n\t// Disables the default reveal.js slide layout (scaling and centering)\n\t// so that you can use custom CSS layout\n\tdisableLayout: false,\n\n\t// Enable the slide overview mode\n\toverview: true,\n\n\t// Vertical centering of slides\n\tcenter: true,\n\n\t// Enables touch navigation on devices with touch input\n\ttouch: true,\n\n\t// Loop the presentation\n\tloop: false,\n\n\t// Change the presentation direction to be RTL\n\trtl: false,\n\n\t// Changes the behavior of our navigation directions.\n\t//\n\t// \"default\"\n\t// Left/right arrow keys step between horizontal slides, up/down\n\t// arrow keys step between vertical slides. Space key steps through\n\t// all slides (both horizontal and vertical).\n\t//\n\t// \"linear\"\n\t// Removes the up/down arrows. Left/right arrows step through all\n\t// slides (both horizontal and vertical).\n\t//\n\t// \"grid\"\n\t// When this is enabled, stepping left/right from a vertical stack\n\t// to an adjacent vertical stack will land you at the same vertical\n\t// index.\n\t//\n\t// Consider a deck with six slides ordered in two vertical stacks:\n\t// 1.1 2.1\n\t// 1.2 2.2\n\t// 1.3 2.3\n\t//\n\t// If you're on slide 1.3 and navigate right, you will normally move\n\t// from 1.3 -> 2.1. If \"grid\" is used, the same navigation takes you\n\t// from 1.3 -> 2.3.\n\tnavigationMode: 'default',\n\n\t// Randomizes the order of slides each time the presentation loads\n\tshuffle: false,\n\n\t// Turns fragments on and off globally\n\tfragments: true,\n\n\t// Flags whether to include the current fragment in the URL,\n\t// so that reloading brings you to the same fragment position\n\tfragmentInURL: true,\n\n\t// Flags if the presentation is running in an embedded mode,\n\t// i.e. contained within a limited portion of the screen\n\tembedded: false,\n\n\t// Flags if we should show a help overlay when the question-mark\n\t// key is pressed\n\thelp: true,\n\n\t// Flags if it should be possible to pause the presentation (blackout)\n\tpause: true,\n\n\t// Flags if speaker notes should be visible to all viewers\n\tshowNotes: false,\n\n\t// Flags if slides with data-visibility=\"hidden\" should be kep visible\n\tshowHiddenSlides: false,\n\n\t// Global override for autoplaying embedded media (video/audio/iframe)\n\t// - null: Media will only autoplay if data-autoplay is present\n\t// - true: All media will autoplay, regardless of individual setting\n\t// - false: No media will autoplay, regardless of individual setting\n\tautoPlayMedia: null,\n\n\t// Global override for preloading lazy-loaded iframes\n\t// - null: Iframes with data-src AND data-preload will be loaded when within\n\t// the viewDistance, iframes with only data-src will be loaded when visible\n\t// - true: All iframes with data-src will be loaded when within the viewDistance\n\t// - false: All iframes with data-src will be loaded only when visible\n\tpreloadIframes: null,\n\n\t// Can be used to globally disable auto-animation\n\tautoAnimate: true,\n\n\t// Optionally provide a custom element matcher that will be\n\t// used to dictate which elements we can animate between.\n\tautoAnimateMatcher: null,\n\n\t// Default settings for our auto-animate transitions, can be\n\t// overridden per-slide or per-element via data arguments\n\tautoAnimateEasing: 'ease',\n\tautoAnimateDuration: 1.0,\n\tautoAnimateUnmatched: true,\n\n\t// CSS properties that can be auto-animated. Position & scale\n\t// is matched separately so there's no need to include styles\n\t// like top/right/bottom/left, width/height or margin.\n\tautoAnimateStyles: [\n\t\t'opacity',\n\t\t'color',\n\t\t'background-color',\n\t\t'padding',\n\t\t'font-size',\n\t\t'line-height',\n\t\t'letter-spacing',\n\t\t'border-width',\n\t\t'border-color',\n\t\t'border-radius',\n\t\t'outline',\n\t\t'outline-offset'\n\t],\n\n\t// Controls automatic progression to the next slide\n\t// - 0: Auto-sliding only happens if the data-autoslide HTML attribute\n\t// is present on the current slide or fragment\n\t// - 1+: All slides will progress automatically at the given interval\n\t// - false: No auto-sliding, even if data-autoslide is present\n\tautoSlide: 0,\n\n\t// Stop auto-sliding after user input\n\tautoSlideStoppable: true,\n\n\t// Use this method for navigation when auto-sliding (defaults to navigateNext)\n\tautoSlideMethod: null,\n\n\t// Specify the average time in seconds that you think you will spend\n\t// presenting each slide. This is used to show a pacing timer in the\n\t// speaker view\n\tdefaultTiming: null,\n\n\t// Enable slide navigation via mouse wheel\n\tmouseWheel: false,\n\n\t// Opens links in an iframe preview overlay\n\t// Add `data-preview-link` and `data-preview-link=\"false\"` to customise each link\n\t// individually\n\tpreviewLinks: false,\n\n\t// Exposes the reveal.js API through window.postMessage\n\tpostMessage: true,\n\n\t// Dispatches all reveal.js events to the parent window through postMessage\n\tpostMessageEvents: false,\n\n\t// Focuses body when page changes visibility to ensure keyboard shortcuts work\n\tfocusBodyOnPageVisibilityChange: true,\n\n\t// Transition style\n\ttransition: 'slide', // none/fade/slide/convex/concave/zoom\n\n\t// Transition speed\n\ttransitionSpeed: 'default', // default/fast/slow\n\n\t// Transition style for full page slide backgrounds\n\tbackgroundTransition: 'fade', // none/fade/slide/convex/concave/zoom\n\n\t// Parallax background image\n\tparallaxBackgroundImage: '', // CSS syntax, e.g. \"a.jpg\"\n\n\t// Parallax background size\n\tparallaxBackgroundSize: '', // CSS syntax, e.g. \"3000px 2000px\"\n\n\t// Parallax background repeat\n\tparallaxBackgroundRepeat: '', // repeat/repeat-x/repeat-y/no-repeat/initial/inherit\n\n\t// Parallax background position\n\tparallaxBackgroundPosition: '', // CSS syntax, e.g. \"top left\"\n\n\t// Amount of pixels to move the parallax background per slide step\n\tparallaxBackgroundHorizontal: null,\n\tparallaxBackgroundVertical: null,\n\n\t// Can be used to initialize reveal.js in one of the following views:\n\t// - print: Render the presentation so that it can be printed to PDF\n\t// - scroll: Show the presentation as a tall scrollable page with scroll\n\t// triggered animations\n\tview: null,\n\n\t// Adjusts the height of each slide in the scroll view.\n\t// - full: Each slide is as tall as the viewport\n\t// - compact: Slides are as small as possible, allowing multiple slides\n\t// to be visible in parallel on tall devices\n\tscrollLayout: 'full',\n\n\t// Control how scroll snapping works in the scroll view.\n\t// - false: \tNo snapping, scrolling is continuous\n\t// - proximity: Snap when close to a slide\n\t// - mandatory: Always snap to the closest slide\n\t//\n\t// Only applies to presentations in scroll view.\n\tscrollSnap: 'mandatory',\n\n\t// Enables and configure the scroll view progress bar.\n\t// - 'auto': Show the scrollbar while scrolling, hide while idle\n\t// - true: Always show the scrollbar\n\t// - false: Never show the scrollbar\n\tscrollProgress: 'auto',\n\n\t// Automatically activate the scroll view when we the viewport falls\n\t// below the given width.\n\tscrollActivationWidth: 435,\n\n\t// The maximum number of pages a single slide can expand onto when printing\n\t// to PDF, unlimited by default\n\tpdfMaxPagesPerSlide: Number.POSITIVE_INFINITY,\n\n\t// Prints each fragment on a separate slide\n\tpdfSeparateFragments: true,\n\n\t// Offset used to reduce the height of content within exported PDF pages.\n\t// This exists to account for environment differences based on how you\n\t// print to PDF. CLI printing options, like phantomjs and wkpdf, can end\n\t// on precisely the total height of the document whereas in-browser\n\t// printing has to end one pixel before.\n\tpdfPageHeightOffset: -1,\n\n\t// Number of slides away from the current that are visible\n\tviewDistance: 3,\n\n\t// Number of slides away from the current that are visible on mobile\n\t// devices. It is advisable to set this to a lower number than\n\t// viewDistance in order to save resources.\n\tmobileViewDistance: 2,\n\n\t// The display mode that will be used to show slides\n\tdisplay: 'block',\n\n\t// Hide cursor if inactive\n\thideInactiveCursor: true,\n\n\t// Time before the cursor is hidden (in ms)\n\thideCursorTime: 5000,\n\n\t// Should we automatically sort and set indices for fragments\n\t// at each sync? (See Reveal.sync)\n\tsortFragmentsOnSync: true,\n\n\t// Script dependencies to load\n\tdependencies: [],\n\n\t// Plugin objects to register and use for this presentation\n\tplugins: []\n\n}","import SlideContent from './controllers/slidecontent.js'\nimport SlideNumber from './controllers/slidenumber.js'\nimport JumpToSlide from './controllers/jumptoslide.js'\nimport Backgrounds from './controllers/backgrounds.js'\nimport AutoAnimate from './controllers/autoanimate.js'\nimport ScrollView from './controllers/scrollview.js'\nimport PrintView from './controllers/printview.js'\nimport Fragments from './controllers/fragments.js'\nimport Overview from './controllers/overview.js'\nimport Keyboard from './controllers/keyboard.js'\nimport Location from './controllers/location.js'\nimport Controls from './controllers/controls.js'\nimport Progress from './controllers/progress.js'\nimport Pointer from './controllers/pointer.js'\nimport Plugins from './controllers/plugins.js'\nimport Touch from './controllers/touch.js'\nimport Focus from './controllers/focus.js'\nimport Notes from './controllers/notes.js'\nimport Playback from './components/playback.js'\nimport defaultConfig from './config.js'\nimport * as Util from './utils/util.js'\nimport * as Device from './utils/device.js'\nimport {\n\tSLIDES_SELECTOR,\n\tHORIZONTAL_SLIDES_SELECTOR,\n\tVERTICAL_SLIDES_SELECTOR,\n\tPOST_MESSAGE_METHOD_BLACKLIST\n} from './utils/constants.js'\n\n// The reveal.js version\nexport const VERSION = '5.1.0';\n\n/**\n * reveal.js\n * https://revealjs.com\n * MIT licensed\n *\n * Copyright (C) 2011-2022 Hakim El Hattab, https://hakim.se\n */\nexport default function( revealElement, options ) {\n\n\t// Support initialization with no args, one arg\n\t// [options] or two args [revealElement, options]\n\tif( arguments.length < 2 ) {\n\t\toptions = arguments[0];\n\t\trevealElement = document.querySelector( '.reveal' );\n\t}\n\n\tconst Reveal = {};\n\n\t// Configuration defaults, can be overridden at initialization time\n\tlet config = {},\n\n\t\t// Flags if initialize() has been invoked for this reveal instance\n\t\tinitialized = false,\n\n\t\t// Flags if reveal.js is loaded (has dispatched the 'ready' event)\n\t\tready = false,\n\n\t\t// The horizontal and vertical index of the currently active slide\n\t\tindexh,\n\t\tindexv,\n\n\t\t// The previous and current slide HTML elements\n\t\tpreviousSlide,\n\t\tcurrentSlide,\n\n\t\t// Remember which directions that the user has navigated towards\n\t\tnavigationHistory = {\n\t\t\thasNavigatedHorizontally: false,\n\t\t\thasNavigatedVertically: false\n\t\t},\n\n\t\t// Slides may have a data-state attribute which we pick up and apply\n\t\t// as a class to the body. This list contains the combined state of\n\t\t// all current slides.\n\t\tstate = [],\n\n\t\t// The current scale of the presentation (see width/height config)\n\t\tscale = 1,\n\n\t\t// CSS transform that is currently applied to the slides container,\n\t\t// split into two groups\n\t\tslidesTransform = { layout: '', overview: '' },\n\n\t\t// Cached references to DOM elements\n\t\tdom = {},\n\n\t\t// Flags if the interaction event listeners are bound\n\t\teventsAreBound = false,\n\n\t\t// The current slide transition state; idle or running\n\t\ttransition = 'idle',\n\n\t\t// The current auto-slide duration\n\t\tautoSlide = 0,\n\n\t\t// Auto slide properties\n\t\tautoSlidePlayer,\n\t\tautoSlideTimeout = 0,\n\t\tautoSlideStartTime = -1,\n\t\tautoSlidePaused = false,\n\n\t\t// Controllers for different aspects of our presentation. They're\n\t\t// all given direct references to this Reveal instance since there\n\t\t// may be multiple presentations running in parallel.\n\t\tslideContent = new SlideContent( Reveal ),\n\t\tslideNumber = new SlideNumber( Reveal ),\n\t\tjumpToSlide = new JumpToSlide( Reveal ),\n\t\tautoAnimate = new AutoAnimate( Reveal ),\n\t\tbackgrounds = new Backgrounds( Reveal ),\n\t\tscrollView = new ScrollView( Reveal ),\n\t\tprintView = new PrintView( Reveal ),\n\t\tfragments = new Fragments( Reveal ),\n\t\toverview = new Overview( Reveal ),\n\t\tkeyboard = new Keyboard( Reveal ),\n\t\tlocation = new Location( Reveal ),\n\t\tcontrols = new Controls( Reveal ),\n\t\tprogress = new Progress( Reveal ),\n\t\tpointer = new Pointer( Reveal ),\n\t\tplugins = new Plugins( Reveal ),\n\t\tfocus = new Focus( Reveal ),\n\t\ttouch = new Touch( Reveal ),\n\t\tnotes = new Notes( Reveal );\n\n\t/**\n\t * Starts up the presentation.\n\t */\n\tfunction initialize( initOptions ) {\n\n\t\tif( !revealElement ) throw 'Unable to find presentation root (<div class=\"reveal\">).';\n\n\t\tinitialized = true;\n\n\t\t// Cache references to key DOM elements\n\t\tdom.wrapper = revealElement;\n\t\tdom.slides = revealElement.querySelector( '.slides' );\n\n\t\tif( !dom.slides ) throw 'Unable to find slides container (<div class=\"slides\">).';\n\n\t\t// Compose our config object in order of increasing precedence:\n\t\t// 1. Default reveal.js options\n\t\t// 2. Options provided via Reveal.configure() prior to\n\t\t// initialization\n\t\t// 3. Options passed to the Reveal constructor\n\t\t// 4. Options passed to Reveal.initialize\n\t\t// 5. Query params\n\t\tconfig = { ...defaultConfig, ...config, ...options, ...initOptions, ...Util.getQueryHash() };\n\n\t\t// Legacy support for the ?print-pdf query\n\t\tif( /print-pdf/gi.test( window.location.search ) ) {\n\t\t\tconfig.view = 'print';\n\t\t}\n\n\t\tsetViewport();\n\n\t\t// Force a layout when the whole page, incl fonts, has loaded\n\t\twindow.addEventListener( 'load', layout, false );\n\n\t\t// Register plugins and load dependencies, then move on to #start()\n\t\tplugins.load( config.plugins, config.dependencies ).then( start );\n\n\t\treturn new Promise( resolve => Reveal.on( 'ready', resolve ) );\n\n\t}\n\n\t/**\n\t * Encase the presentation in a reveal.js viewport. The\n\t * extent of the viewport differs based on configuration.\n\t */\n\tfunction setViewport() {\n\n\t\t// Embedded decks use the reveal element as their viewport\n\t\tif( config.embedded === true ) {\n\t\t\tdom.viewport = Util.closest( revealElement, '.reveal-viewport' ) || revealElement;\n\t\t}\n\t\t// Full-page decks use the body as their viewport\n\t\telse {\n\t\t\tdom.viewport = document.body;\n\t\t\tdocument.documentElement.classList.add( 'reveal-full-page' );\n\t\t}\n\n\t\tdom.viewport.classList.add( 'reveal-viewport' );\n\n\t}\n\n\t/**\n\t * Starts up reveal.js by binding input events and navigating\n\t * to the current URL deeplink if there is one.\n\t */\n\tfunction start() {\n\n\t\tready = true;\n\n\t\t// Remove slides hidden with data-visibility\n\t\tremoveHiddenSlides();\n\n\t\t// Make sure we've got all the DOM elements we need\n\t\tsetupDOM();\n\n\t\t// Listen to messages posted to this window\n\t\tsetupPostMessage();\n\n\t\t// Prevent the slides from being scrolled out of view\n\t\tsetupScrollPrevention();\n\n\t\t// Adds bindings for fullscreen mode\n\t\tsetupFullscreen();\n\n\t\t// Resets all vertical slides so that only the first is visible\n\t\tresetVerticalSlides();\n\n\t\t// Updates the presentation to match the current configuration values\n\t\tconfigure();\n\n\t\t// Create slide backgrounds\n\t\tbackgrounds.update( true );\n\n\t\t// Activate the print/scroll view if configured\n\t\tactivateInitialView();\n\n\t\t// Read the initial hash\n\t\tlocation.readURL();\n\n\t\t// Notify listeners that the presentation is ready but use a 1ms\n\t\t// timeout to ensure it's not fired synchronously after #initialize()\n\t\tsetTimeout( () => {\n\t\t\t// Enable transitions now that we're loaded\n\t\t\tdom.slides.classList.remove( 'no-transition' );\n\n\t\t\tdom.wrapper.classList.add( 'ready' );\n\n\t\t\tdispatchEvent({\n\t\t\t\ttype: 'ready',\n\t\t\t\tdata: {\n\t\t\t\t\tindexh,\n\t\t\t\t\tindexv,\n\t\t\t\t\tcurrentSlide\n\t\t\t\t}\n\t\t\t});\n\t\t}, 1 );\n\n\t}\n\n\t/**\n\t * Activates the correct reveal.js view based on our config.\n\t * This is only invoked once during initialization.\n\t */\n\tfunction activateInitialView() {\n\n\t\tconst activatePrintView = config.view === 'print';\n\t\tconst activateScrollView = config.view === 'scroll' || config.view === 'reader';\n\n\t\tif( activatePrintView || activateScrollView ) {\n\n\t\t\tif( activatePrintView ) {\n\t\t\t\tremoveEventListeners();\n\t\t\t}\n\t\t\telse {\n\t\t\t\ttouch.unbind();\n\t\t\t}\n\n\t\t\t// Avoid content flickering during layout\n\t\t\tdom.viewport.classList.add( 'loading-scroll-mode' );\n\n\t\t\tif( activatePrintView ) {\n\t\t\t\t// The document needs to have loaded for the PDF layout\n\t\t\t\t// measurements to be accurate\n\t\t\t\tif( document.readyState === 'complete' ) {\n\t\t\t\t\tprintView.activate();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\twindow.addEventListener( 'load', () => printView.activate() );\n\t\t\t\t}\n\t\t\t}\n\t\t\telse {\n\t\t\t\tscrollView.activate();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Removes all slides with data-visibility=\"hidden\". This\n\t * is done right before the rest of the presentation is\n\t * initialized.\n\t *\n\t * If you want to show all hidden slides, initialize\n\t * reveal.js with showHiddenSlides set to true.\n\t */\n\tfunction removeHiddenSlides() {\n\n\t\tif( !config.showHiddenSlides ) {\n\t\t\tUtil.queryAll( dom.wrapper, 'section[data-visibility=\"hidden\"]' ).forEach( slide => {\n\t\t\t\tconst parent = slide.parentNode;\n\n\t\t\t\t// If this slide is part of a stack and that stack will be\n\t\t\t\t// empty after removing the hidden slide, remove the entire\n\t\t\t\t// stack\n\t\t\t\tif( parent.childElementCount === 1 && /section/i.test( parent.nodeName ) ) {\n\t\t\t\t\tparent.remove();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tslide.remove();\n\t\t\t\t}\n\n\t\t\t} );\n\t\t}\n\n\t}\n\n\t/**\n\t * Finds and stores references to DOM elements which are\n\t * required by the presentation. If a required element is\n\t * not found, it is created.\n\t */\n\tfunction setupDOM() {\n\n\t\t// Prevent transitions while we're loading\n\t\tdom.slides.classList.add( 'no-transition' );\n\n\t\tif( Device.isMobile ) {\n\t\t\tdom.wrapper.classList.add( 'no-hover' );\n\t\t}\n\t\telse {\n\t\t\tdom.wrapper.classList.remove( 'no-hover' );\n\t\t}\n\n\t\tbackgrounds.render();\n\t\tslideNumber.render();\n\t\tjumpToSlide.render();\n\t\tcontrols.render();\n\t\tprogress.render();\n\t\tnotes.render();\n\n\t\t// Overlay graphic which is displayed during the paused mode\n\t\tdom.pauseOverlay = Util.createSingletonNode( dom.wrapper, 'div', 'pause-overlay', config.controls ? '<button class=\"resume-button\">Resume presentation</button>' : null );\n\n\t\tdom.statusElement = createStatusElement();\n\n\t\tdom.wrapper.setAttribute( 'role', 'application' );\n\t}\n\n\t/**\n\t * Creates a hidden div with role aria-live to announce the\n\t * current slide content. Hide the div off-screen to make it\n\t * available only to Assistive Technologies.\n\t *\n\t * @return {HTMLElement}\n\t */\n\tfunction createStatusElement() {\n\n\t\tlet statusElement = dom.wrapper.querySelector( '.aria-status' );\n\t\tif( !statusElement ) {\n\t\t\tstatusElement = document.createElement( 'div' );\n\t\t\tstatusElement.style.position = 'absolute';\n\t\t\tstatusElement.style.height = '1px';\n\t\t\tstatusElement.style.width = '1px';\n\t\t\tstatusElement.style.overflow = 'hidden';\n\t\t\tstatusElement.style.clip = 'rect( 1px, 1px, 1px, 1px )';\n\t\t\tstatusElement.classList.add( 'aria-status' );\n\t\t\tstatusElement.setAttribute( 'aria-live', 'polite' );\n\t\t\tstatusElement.setAttribute( 'aria-atomic','true' );\n\t\t\tdom.wrapper.appendChild( statusElement );\n\t\t}\n\t\treturn statusElement;\n\n\t}\n\n\t/**\n\t * Announces the given text to screen readers.\n\t */\n\tfunction announceStatus( value ) {\n\n\t\tdom.statusElement.textContent = value;\n\n\t}\n\n\t/**\n\t * Converts the given HTML element into a string of text\n\t * that can be announced to a screen reader. Hidden\n\t * elements are excluded.\n\t */\n\tfunction getStatusText( node ) {\n\n\t\tlet text = '';\n\n\t\t// Text node\n\t\tif( node.nodeType === 3 ) {\n\t\t\ttext += node.textContent;\n\t\t}\n\t\t// Element node\n\t\telse if( node.nodeType === 1 ) {\n\n\t\t\tlet isAriaHidden = node.getAttribute( 'aria-hidden' );\n\t\t\tlet isDisplayHidden = window.getComputedStyle( node )['display'] === 'none';\n\t\t\tif( isAriaHidden !== 'true' && !isDisplayHidden ) {\n\n\t\t\t\tArray.from( node.childNodes ).forEach( child => {\n\t\t\t\t\ttext += getStatusText( child );\n\t\t\t\t} );\n\n\t\t\t}\n\n\t\t}\n\n\t\ttext = text.trim();\n\n\t\treturn text === '' ? '' : text + ' ';\n\n\t}\n\n\t/**\n\t * This is an unfortunate necessity. Some actions – such as\n\t * an input field being focused in an iframe or using the\n\t * keyboard to expand text selection beyond the bounds of\n\t * a slide – can trigger our content to be pushed out of view.\n\t * This scrolling can not be prevented by hiding overflow in\n\t * CSS (we already do) so we have to resort to repeatedly\n\t * checking if the slides have been offset :(\n\t */\n\tfunction setupScrollPrevention() {\n\n\t\tsetInterval( () => {\n\t\t\tif( !scrollView.isActive() && dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {\n\t\t\t\tdom.wrapper.scrollTop = 0;\n\t\t\t\tdom.wrapper.scrollLeft = 0;\n\t\t\t}\n\t\t}, 1000 );\n\n\t}\n\n\t/**\n\t * After entering fullscreen we need to force a layout to\n\t * get our presentations to scale correctly. This behavior\n\t * is inconsistent across browsers but a force layout seems\n\t * to normalize it.\n\t */\n\tfunction setupFullscreen() {\n\n\t\tdocument.addEventListener( 'fullscreenchange', onFullscreenChange );\n\t\tdocument.addEventListener( 'webkitfullscreenchange', onFullscreenChange );\n\n\t}\n\n\t/**\n\t * Registers a listener to postMessage events, this makes it\n\t * possible to call all reveal.js API methods from another\n\t * window. For example:\n\t *\n\t * revealWindow.postMessage( JSON.stringify({\n\t * method: 'slide',\n\t * args: [ 2 ]\n\t * }), '*' );\n\t */\n\tfunction setupPostMessage() {\n\n\t\tif( config.postMessage ) {\n\t\t\twindow.addEventListener( 'message', onPostMessage, false );\n\t\t}\n\n\t}\n\n\t/**\n\t * Applies the configuration settings from the config\n\t * object. May be called multiple times.\n\t *\n\t * @param {object} options\n\t */\n\tfunction configure( options ) {\n\n\t\tconst oldConfig = { ...config }\n\n\t\t// New config options may be passed when this method\n\t\t// is invoked through the API after initialization\n\t\tif( typeof options === 'object' ) Util.extend( config, options );\n\n\t\t// Abort if reveal.js hasn't finished loading, config\n\t\t// changes will be applied automatically once ready\n\t\tif( Reveal.isReady() === false ) return;\n\n\t\tconst numberOfSlides = dom.wrapper.querySelectorAll( SLIDES_SELECTOR ).length;\n\n\t\t// The transition is added as a class on the .reveal element\n\t\tdom.wrapper.classList.remove( oldConfig.transition );\n\t\tdom.wrapper.classList.add( config.transition );\n\n\t\tdom.wrapper.setAttribute( 'data-transition-speed', config.transitionSpeed );\n\t\tdom.wrapper.setAttribute( 'data-background-transition', config.backgroundTransition );\n\n\t\t// Expose our configured slide dimensions as custom props\n\t\tdom.viewport.style.setProperty( '--slide-width', typeof config.width === 'string' ? config.width : config.width + 'px' );\n\t\tdom.viewport.style.setProperty( '--slide-height', typeof config.height === 'string' ? config.height : config.height + 'px' );\n\n\t\tif( config.shuffle ) {\n\t\t\tshuffle();\n\t\t}\n\n\t\tUtil.toggleClass( dom.wrapper, 'embedded', config.embedded );\n\t\tUtil.toggleClass( dom.wrapper, 'rtl', config.rtl );\n\t\tUtil.toggleClass( dom.wrapper, 'center', config.center );\n\n\t\t// Exit the paused mode if it was configured off\n\t\tif( config.pause === false ) {\n\t\t\tresume();\n\t\t}\n\n\t\t// Iframe link previews\n\t\tif( config.previewLinks ) {\n\t\t\tenablePreviewLinks();\n\t\t\tdisablePreviewLinks( '[data-preview-link=false]' );\n\t\t}\n\t\telse {\n\t\t\tdisablePreviewLinks();\n\t\t\tenablePreviewLinks( '[data-preview-link]:not([data-preview-link=false])' );\n\t\t}\n\n\t\t// Reset all changes made by auto-animations\n\t\tautoAnimate.reset();\n\n\t\t// Remove existing auto-slide controls\n\t\tif( autoSlidePlayer ) {\n\t\t\tautoSlidePlayer.destroy();\n\t\t\tautoSlidePlayer = null;\n\t\t}\n\n\t\t// Generate auto-slide controls if needed\n\t\tif( numberOfSlides > 1 && config.autoSlide && config.autoSlideStoppable ) {\n\t\t\tautoSlidePlayer = new Playback( dom.wrapper, () => {\n\t\t\t\treturn Math.min( Math.max( ( Date.now() - autoSlideStartTime ) / autoSlide, 0 ), 1 );\n\t\t\t} );\n\n\t\t\tautoSlidePlayer.on( 'click', onAutoSlidePlayerClick );\n\t\t\tautoSlidePaused = false;\n\t\t}\n\n\t\t// Add the navigation mode to the DOM so we can adjust styling\n\t\tif( config.navigationMode !== 'default' ) {\n\t\t\tdom.wrapper.setAttribute( 'data-navigation-mode', config.navigationMode );\n\t\t}\n\t\telse {\n\t\t\tdom.wrapper.removeAttribute( 'data-navigation-mode' );\n\t\t}\n\n\t\tnotes.configure( config, oldConfig );\n\t\tfocus.configure( config, oldConfig );\n\t\tpointer.configure( config, oldConfig );\n\t\tcontrols.configure( config, oldConfig );\n\t\tprogress.configure( config, oldConfig );\n\t\tkeyboard.configure( config, oldConfig );\n\t\tfragments.configure( config, oldConfig );\n\t\tslideNumber.configure( config, oldConfig );\n\n\t\tsync();\n\n\t}\n\n\t/**\n\t * Binds all event listeners.\n\t */\n\tfunction addEventListeners() {\n\n\t\teventsAreBound = true;\n\n\t\twindow.addEventListener( 'resize', onWindowResize, false );\n\n\t\tif( config.touch ) touch.bind();\n\t\tif( config.keyboard ) keyboard.bind();\n\t\tif( config.progress ) progress.bind();\n\t\tif( config.respondToHashChanges ) location.bind();\n\t\tcontrols.bind();\n\t\tfocus.bind();\n\n\t\tdom.slides.addEventListener( 'click', onSlidesClicked, false );\n\t\tdom.slides.addEventListener( 'transitionend', onTransitionEnd, false );\n\t\tdom.pauseOverlay.addEventListener( 'click', resume, false );\n\n\t\tif( config.focusBodyOnPageVisibilityChange ) {\n\t\t\tdocument.addEventListener( 'visibilitychange', onPageVisibilityChange, false );\n\t\t}\n\n\t}\n\n\t/**\n\t * Unbinds all event listeners.\n\t */\n\tfunction removeEventListeners() {\n\n\t\teventsAreBound = false;\n\n\t\ttouch.unbind();\n\t\tfocus.unbind();\n\t\tkeyboard.unbind();\n\t\tcontrols.unbind();\n\t\tprogress.unbind();\n\t\tlocation.unbind();\n\n\t\twindow.removeEventListener( 'resize', onWindowResize, false );\n\n\t\tdom.slides.removeEventListener( 'click', onSlidesClicked, false );\n\t\tdom.slides.removeEventListener( 'transitionend', onTransitionEnd, false );\n\t\tdom.pauseOverlay.removeEventListener( 'click', resume, false );\n\n\t}\n\n\t/**\n\t * Uninitializes reveal.js by undoing changes made to the\n\t * DOM and removing all event listeners.\n\t */\n\tfunction destroy() {\n\n\t\t// There's nothing to destroy if this instance hasn't been\n\t\t// initialized yet\n\t\tif( initialized === false ) return;\n\n\t\tremoveEventListeners();\n\t\tcancelAutoSlide();\n\t\tdisablePreviewLinks();\n\n\t\t// Destroy controllers\n\t\tnotes.destroy();\n\t\tfocus.destroy();\n\t\tplugins.destroy();\n\t\tpointer.destroy();\n\t\tcontrols.destroy();\n\t\tprogress.destroy();\n\t\tbackgrounds.destroy();\n\t\tslideNumber.destroy();\n\t\tjumpToSlide.destroy();\n\n\t\t// Remove event listeners\n\t\tdocument.removeEventListener( 'fullscreenchange', onFullscreenChange );\n\t\tdocument.removeEventListener( 'webkitfullscreenchange', onFullscreenChange );\n\t\tdocument.removeEventListener( 'visibilitychange', onPageVisibilityChange, false );\n\t\twindow.removeEventListener( 'message', onPostMessage, false );\n\t\twindow.removeEventListener( 'load', layout, false );\n\n\t\t// Undo DOM changes\n\t\tif( dom.pauseOverlay ) dom.pauseOverlay.remove();\n\t\tif( dom.statusElement ) dom.statusElement.remove();\n\n\t\tdocument.documentElement.classList.remove( 'reveal-full-page' );\n\n\t\tdom.wrapper.classList.remove( 'ready', 'center', 'has-horizontal-slides', 'has-vertical-slides' );\n\t\tdom.wrapper.removeAttribute( 'data-transition-speed' );\n\t\tdom.wrapper.removeAttribute( 'data-background-transition' );\n\n\t\tdom.viewport.classList.remove( 'reveal-viewport' );\n\t\tdom.viewport.style.removeProperty( '--slide-width' );\n\t\tdom.viewport.style.removeProperty( '--slide-height' );\n\n\t\tdom.slides.style.removeProperty( 'width' );\n\t\tdom.slides.style.removeProperty( 'height' );\n\t\tdom.slides.style.removeProperty( 'zoom' );\n\t\tdom.slides.style.removeProperty( 'left' );\n\t\tdom.slides.style.removeProperty( 'top' );\n\t\tdom.slides.style.removeProperty( 'bottom' );\n\t\tdom.slides.style.removeProperty( 'right' );\n\t\tdom.slides.style.removeProperty( 'transform' );\n\n\t\tArray.from( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( slide => {\n\t\t\tslide.style.removeProperty( 'display' );\n\t\t\tslide.style.removeProperty( 'top' );\n\t\t\tslide.removeAttribute( 'hidden' );\n\t\t\tslide.removeAttribute( 'aria-hidden' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Adds a listener to one of our custom reveal.js events,\n\t * like slidechanged.\n\t */\n\tfunction on( type, listener, useCapture ) {\n\n\t\trevealElement.addEventListener( type, listener, useCapture );\n\n\t}\n\n\t/**\n\t * Unsubscribes from a reveal.js event.\n\t */\n\tfunction off( type, listener, useCapture ) {\n\n\t\trevealElement.removeEventListener( type, listener, useCapture );\n\n\t}\n\n\t/**\n\t * Applies CSS transforms to the slides container. The container\n\t * is transformed from two separate sources: layout and the overview\n\t * mode.\n\t *\n\t * @param {object} transforms\n\t */\n\tfunction transformSlides( transforms ) {\n\n\t\t// Pick up new transforms from arguments\n\t\tif( typeof transforms.layout === 'string' ) slidesTransform.layout = transforms.layout;\n\t\tif( typeof transforms.overview === 'string' ) slidesTransform.overview = transforms.overview;\n\n\t\t// Apply the transforms to the slides container\n\t\tif( slidesTransform.layout ) {\n\t\t\tUtil.transformElement( dom.slides, slidesTransform.layout + ' ' + slidesTransform.overview );\n\t\t}\n\t\telse {\n\t\t\tUtil.transformElement( dom.slides, slidesTransform.overview );\n\t\t}\n\n\t}\n\n\t/**\n\t * Dispatches an event of the specified type from the\n\t * reveal DOM element.\n\t */\n\tfunction dispatchEvent({ target=dom.wrapper, type, data, bubbles=true }) {\n\n\t\tlet event = document.createEvent( 'HTMLEvents', 1, 2 );\n\t\tevent.initEvent( type, bubbles, true );\n\t\tUtil.extend( event, data );\n\t\ttarget.dispatchEvent( event );\n\n\t\tif( target === dom.wrapper ) {\n\t\t\t// If we're in an iframe, post each reveal.js event to the\n\t\t\t// parent window. Used by the notes plugin\n\t\t\tdispatchPostMessage( type );\n\t\t}\n\n\t\treturn event;\n\n\t}\n\n\t/**\n\t * Dispatches a slidechanged event.\n\t *\n\t * @param {string} origin Used to identify multiplex clients\n\t */\n\tfunction dispatchSlideChanged( origin ) {\n\n\t\tdispatchEvent({\n\t\t\ttype: 'slidechanged',\n\t\t\tdata: {\n\t\t\t\tindexh,\n\t\t\t\tindexv,\n\t\t\t\tpreviousSlide,\n\t\t\t\tcurrentSlide,\n\t\t\t\torigin\n\t\t\t}\n\t\t});\n\n\t}\n\n\t/**\n\t * Dispatched a postMessage of the given type from our window.\n\t */\n\tfunction dispatchPostMessage( type, data ) {\n\n\t\tif( config.postMessageEvents && window.parent !== window.self ) {\n\t\t\tlet message = {\n\t\t\t\tnamespace: 'reveal',\n\t\t\t\teventName: type,\n\t\t\t\tstate: getState()\n\t\t\t};\n\n\t\t\tUtil.extend( message, data );\n\n\t\t\twindow.parent.postMessage( JSON.stringify( message ), '*' );\n\t\t}\n\n\t}\n\n\t/**\n\t * Bind preview frame links.\n\t *\n\t * @param {string} [selector=a] - selector for anchors\n\t */\n\tfunction enablePreviewLinks( selector = 'a' ) {\n\n\t\tArray.from( dom.wrapper.querySelectorAll( selector ) ).forEach( element => {\n\t\t\tif( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {\n\t\t\t\telement.addEventListener( 'click', onPreviewLinkClicked, false );\n\t\t\t}\n\t\t} );\n\n\t}\n\n\t/**\n\t * Unbind preview frame links.\n\t */\n\tfunction disablePreviewLinks( selector = 'a' ) {\n\n\t\tArray.from( dom.wrapper.querySelectorAll( selector ) ).forEach( element => {\n\t\t\tif( /^(http|www)/gi.test( element.getAttribute( 'href' ) ) ) {\n\t\t\t\telement.removeEventListener( 'click', onPreviewLinkClicked, false );\n\t\t\t}\n\t\t} );\n\n\t}\n\n\t/**\n\t * Opens a preview window for the target URL.\n\t *\n\t * @param {string} url - url for preview iframe src\n\t */\n\tfunction showPreview( url ) {\n\n\t\tcloseOverlay();\n\n\t\tdom.overlay = document.createElement( 'div' );\n\t\tdom.overlay.classList.add( 'overlay' );\n\t\tdom.overlay.classList.add( 'overlay-preview' );\n\t\tdom.wrapper.appendChild( dom.overlay );\n\n\t\tdom.overlay.innerHTML =\n\t\t\t`<header>\n\t\t\t\t<a class=\"close\" href=\"#\"><span class=\"icon\"></span></a>\n\t\t\t\t<a class=\"external\" href=\"${url}\" target=\"_blank\"><span class=\"icon\"></span></a>\n\t\t\t</header>\n\t\t\t<div class=\"spinner\"></div>\n\t\t\t<div class=\"viewport\">\n\t\t\t\t<iframe src=\"${url}\"></iframe>\n\t\t\t\t<small class=\"viewport-inner\">\n\t\t\t\t\t<span class=\"x-frame-error\">Unable to load iframe. This is likely due to the site's policy (x-frame-options).</span>\n\t\t\t\t</small>\n\t\t\t</div>`;\n\n\t\tdom.overlay.querySelector( 'iframe' ).addEventListener( 'load', event => {\n\t\t\tdom.overlay.classList.add( 'loaded' );\n\t\t}, false );\n\n\t\tdom.overlay.querySelector( '.close' ).addEventListener( 'click', event => {\n\t\t\tcloseOverlay();\n\t\t\tevent.preventDefault();\n\t\t}, false );\n\n\t\tdom.overlay.querySelector( '.external' ).addEventListener( 'click', event => {\n\t\t\tcloseOverlay();\n\t\t}, false );\n\n\t}\n\n\t/**\n\t * Open or close help overlay window.\n\t *\n\t * @param {Boolean} [override] Flag which overrides the\n\t * toggle logic and forcibly sets the desired state. True means\n\t * help is open, false means it's closed.\n\t */\n\tfunction toggleHelp( override ){\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? showHelp() : closeOverlay();\n\t\t}\n\t\telse {\n\t\t\tif( dom.overlay ) {\n\t\t\t\tcloseOverlay();\n\t\t\t}\n\t\t\telse {\n\t\t\t\tshowHelp();\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Opens an overlay window with help material.\n\t */\n\tfunction showHelp() {\n\n\t\tif( config.help ) {\n\n\t\t\tcloseOverlay();\n\n\t\t\tdom.overlay = document.createElement( 'div' );\n\t\t\tdom.overlay.classList.add( 'overlay' );\n\t\t\tdom.overlay.classList.add( 'overlay-help' );\n\t\t\tdom.wrapper.appendChild( dom.overlay );\n\n\t\t\tlet html = '<p class=\"title\">Keyboard Shortcuts</p><br/>';\n\n\t\t\tlet shortcuts = keyboard.getShortcuts(),\n\t\t\t\tbindings = keyboard.getBindings();\n\n\t\t\thtml += '<table><th>KEY</th><th>ACTION</th>';\n\t\t\tfor( let key in shortcuts ) {\n\t\t\t\thtml += `<tr><td>${key}</td><td>${shortcuts[ key ]}</td></tr>`;\n\t\t\t}\n\n\t\t\t// Add custom key bindings that have associated descriptions\n\t\t\tfor( let binding in bindings ) {\n\t\t\t\tif( bindings[binding].key && bindings[binding].description ) {\n\t\t\t\t\thtml += `<tr><td>${bindings[binding].key}</td><td>${bindings[binding].description}</td></tr>`;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\thtml += '</table>';\n\n\t\t\tdom.overlay.innerHTML = `\n\t\t\t\t<header>\n\t\t\t\t\t<a class=\"close\" href=\"#\"><span class=\"icon\"></span></a>\n\t\t\t\t</header>\n\t\t\t\t<div class=\"viewport\">\n\t\t\t\t\t<div class=\"viewport-inner\">${html}</div>\n\t\t\t\t</div>\n\t\t\t`;\n\n\t\t\tdom.overlay.querySelector( '.close' ).addEventListener( 'click', event => {\n\t\t\t\tcloseOverlay();\n\t\t\t\tevent.preventDefault();\n\t\t\t}, false );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Closes any currently open overlay.\n\t */\n\tfunction closeOverlay() {\n\n\t\tif( dom.overlay ) {\n\t\t\tdom.overlay.parentNode.removeChild( dom.overlay );\n\t\t\tdom.overlay = null;\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Applies JavaScript-controlled layout rules to the\n\t * presentation.\n\t */\n\tfunction layout() {\n\n\t\tif( dom.wrapper && !printView.isActive() ) {\n\n\t\t\tconst viewportWidth = dom.viewport.offsetWidth;\n\t\t\tconst viewportHeight = dom.viewport.offsetHeight;\n\n\t\t\tif( !config.disableLayout ) {\n\n\t\t\t\t// On some mobile devices '100vh' is taller than the visible\n\t\t\t\t// viewport which leads to part of the presentation being\n\t\t\t\t// cut off. To work around this we define our own '--vh' custom\n\t\t\t\t// property where 100x adds up to the correct height.\n\t\t\t\t//\n\t\t\t\t// https://css-tricks.com/the-trick-to-viewport-units-on-mobile/\n\t\t\t\tif( Device.isMobile && !config.embedded ) {\n\t\t\t\t\tdocument.documentElement.style.setProperty( '--vh', ( window.innerHeight * 0.01 ) + 'px' );\n\t\t\t\t}\n\n\t\t\t\tconst size = scrollView.isActive() ?\n\t\t\t\t\t\t\t getComputedSlideSize( viewportWidth, viewportHeight ) :\n\t\t\t\t\t\t\t getComputedSlideSize();\n\n\t\t\t\tconst oldScale = scale;\n\n\t\t\t\t// Layout the contents of the slides\n\t\t\t\tlayoutSlideContents( config.width, config.height );\n\n\t\t\t\tdom.slides.style.width = size.width + 'px';\n\t\t\t\tdom.slides.style.height = size.height + 'px';\n\n\t\t\t\t// Determine scale of content to fit within available space\n\t\t\t\tscale = Math.min( size.presentationWidth / size.width, size.presentationHeight / size.height );\n\n\t\t\t\t// Respect max/min scale settings\n\t\t\t\tscale = Math.max( scale, config.minScale );\n\t\t\t\tscale = Math.min( scale, config.maxScale );\n\n\t\t\t\t// Don't apply any scaling styles if scale is 1 or we're\n\t\t\t\t// in the scroll view\n\t\t\t\tif( scale === 1 || scrollView.isActive() ) {\n\t\t\t\t\tdom.slides.style.zoom = '';\n\t\t\t\t\tdom.slides.style.left = '';\n\t\t\t\t\tdom.slides.style.top = '';\n\t\t\t\t\tdom.slides.style.bottom = '';\n\t\t\t\t\tdom.slides.style.right = '';\n\t\t\t\t\ttransformSlides( { layout: '' } );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tdom.slides.style.zoom = '';\n\t\t\t\t\tdom.slides.style.left = '50%';\n\t\t\t\t\tdom.slides.style.top = '50%';\n\t\t\t\t\tdom.slides.style.bottom = 'auto';\n\t\t\t\t\tdom.slides.style.right = 'auto';\n\t\t\t\t\ttransformSlides( { layout: 'translate(-50%, -50%) scale('+ scale +')' } );\n\t\t\t\t}\n\n\t\t\t\t// Select all slides, vertical and horizontal\n\t\t\t\tconst slides = Array.from( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) );\n\n\t\t\t\tfor( let i = 0, len = slides.length; i < len; i++ ) {\n\t\t\t\t\tconst slide = slides[ i ];\n\n\t\t\t\t\t// Don't bother updating invisible slides\n\t\t\t\t\tif( slide.style.display === 'none' ) {\n\t\t\t\t\t\tcontinue;\n\t\t\t\t\t}\n\n\t\t\t\t\tif( ( config.center || slide.classList.contains( 'center' ) ) ) {\n\t\t\t\t\t\t// Vertical stacks are not centred since their section\n\t\t\t\t\t\t// children will be\n\t\t\t\t\t\tif( slide.classList.contains( 'stack' ) ) {\n\t\t\t\t\t\t\tslide.style.top = 0;\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tslide.style.top = Math.max( ( size.height - slide.scrollHeight ) / 2, 0 ) + 'px';\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tslide.style.top = '';\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tif( oldScale !== scale ) {\n\t\t\t\t\tdispatchEvent({\n\t\t\t\t\t\ttype: 'resize',\n\t\t\t\t\t\tdata: {\n\t\t\t\t\t\t\toldScale,\n\t\t\t\t\t\t\tscale,\n\t\t\t\t\t\t\tsize\n\t\t\t\t\t\t}\n\t\t\t\t\t});\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tcheckResponsiveScrollView();\n\n\t\t\tdom.viewport.style.setProperty( '--slide-scale', scale );\n\t\t\tdom.viewport.style.setProperty( '--viewport-width', viewportWidth + 'px' );\n\t\t\tdom.viewport.style.setProperty( '--viewport-height', viewportHeight + 'px' );\n\n\t\t\tscrollView.layout();\n\n\t\t\tprogress.update();\n\t\t\tbackgrounds.updateParallax();\n\n\t\t\tif( overview.isActive() ) {\n\t\t\t\toverview.update();\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Applies layout logic to the contents of all slides in\n\t * the presentation.\n\t *\n\t * @param {string|number} width\n\t * @param {string|number} height\n\t */\n\tfunction layoutSlideContents( width, height ) {\n\t\t// Handle sizing of elements with the 'r-stretch' class\n\t\tUtil.queryAll( dom.slides, 'section > .stretch, section > .r-stretch' ).forEach( element => {\n\n\t\t\t// Determine how much vertical space we can use\n\t\t\tlet remainingHeight = Util.getRemainingHeight( element, height );\n\n\t\t\t// Consider the aspect ratio of media elements\n\t\t\tif( /(img|video)/gi.test( element.nodeName ) ) {\n\t\t\t\tconst nw = element.naturalWidth || element.videoWidth,\n\t\t\t\t\t nh = element.naturalHeight || element.videoHeight;\n\n\t\t\t\tconst es = Math.min( width / nw, remainingHeight / nh );\n\n\t\t\t\telement.style.width = ( nw * es ) + 'px';\n\t\t\t\telement.style.height = ( nh * es ) + 'px';\n\n\t\t\t}\n\t\t\telse {\n\t\t\t\telement.style.width = width + 'px';\n\t\t\t\telement.style.height = remainingHeight + 'px';\n\t\t\t}\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Responsively activates the scroll mode when we reach the configured\n\t * activation width.\n\t */\n\tfunction checkResponsiveScrollView() {\n\n\t\t// Only proceed if...\n\t\t// 1. The DOM is ready\n\t\t// 2. Layouts aren't disabled via config\n\t\t// 3. We're not currently printing\n\t\t// 4. There is a scrollActivationWidth set\n\t\t// 5. The deck isn't configured to always use the scroll view\n\t\tif(\n\t\t\tdom.wrapper &&\n\t\t\t!config.disableLayout &&\n\t\t\t!printView.isActive() &&\n\t\t\ttypeof config.scrollActivationWidth === 'number' &&\n\t\t\tconfig.view !== 'scroll'\n\t\t) {\n\t\t\tconst size = getComputedSlideSize();\n\n\t\t\tif( size.presentationWidth > 0 && size.presentationWidth <= config.scrollActivationWidth ) {\n\t\t\t\tif( !scrollView.isActive() ) {\n\t\t\t\t\tbackgrounds.create();\n\t\t\t\t\tscrollView.activate()\n\t\t\t\t};\n\t\t\t}\n\t\t\telse {\n\t\t\t\tif( scrollView.isActive() ) scrollView.deactivate();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Calculates the computed pixel size of our slides. These\n\t * values are based on the width and height configuration\n\t * options.\n\t *\n\t * @param {number} [presentationWidth=dom.wrapper.offsetWidth]\n\t * @param {number} [presentationHeight=dom.wrapper.offsetHeight]\n\t */\n\tfunction getComputedSlideSize( presentationWidth, presentationHeight ) {\n\n\t\tlet width = config.width;\n\t\tlet height = config.height;\n\n\t\tif( config.disableLayout ) {\n\t\t\twidth = dom.slides.offsetWidth;\n\t\t\theight = dom.slides.offsetHeight;\n\t\t}\n\n\t\tconst size = {\n\t\t\t// Slide size\n\t\t\twidth: width,\n\t\t\theight: height,\n\n\t\t\t// Presentation size\n\t\t\tpresentationWidth: presentationWidth || dom.wrapper.offsetWidth,\n\t\t\tpresentationHeight: presentationHeight || dom.wrapper.offsetHeight\n\t\t};\n\n\t\t// Reduce available space by margin\n\t\tsize.presentationWidth -= ( size.presentationWidth * config.margin );\n\t\tsize.presentationHeight -= ( size.presentationHeight * config.margin );\n\n\t\t// Slide width may be a percentage of available width\n\t\tif( typeof size.width === 'string' && /%$/.test( size.width ) ) {\n\t\t\tsize.width = parseInt( size.width, 10 ) / 100 * size.presentationWidth;\n\t\t}\n\n\t\t// Slide height may be a percentage of available height\n\t\tif( typeof size.height === 'string' && /%$/.test( size.height ) ) {\n\t\t\tsize.height = parseInt( size.height, 10 ) / 100 * size.presentationHeight;\n\t\t}\n\n\t\treturn size;\n\n\t}\n\n\t/**\n\t * Stores the vertical index of a stack so that the same\n\t * vertical slide can be selected when navigating to and\n\t * from the stack.\n\t *\n\t * @param {HTMLElement} stack The vertical stack element\n\t * @param {string|number} [v=0] Index to memorize\n\t */\n\tfunction setPreviousVerticalIndex( stack, v ) {\n\n\t\tif( typeof stack === 'object' && typeof stack.setAttribute === 'function' ) {\n\t\t\tstack.setAttribute( 'data-previous-indexv', v || 0 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Retrieves the vertical index which was stored using\n\t * #setPreviousVerticalIndex() or 0 if no previous index\n\t * exists.\n\t *\n\t * @param {HTMLElement} stack The vertical stack element\n\t */\n\tfunction getPreviousVerticalIndex( stack ) {\n\n\t\tif( typeof stack === 'object' && typeof stack.setAttribute === 'function' && stack.classList.contains( 'stack' ) ) {\n\t\t\t// Prefer manually defined start-indexv\n\t\t\tconst attributeName = stack.hasAttribute( 'data-start-indexv' ) ? 'data-start-indexv' : 'data-previous-indexv';\n\n\t\t\treturn parseInt( stack.getAttribute( attributeName ) || 0, 10 );\n\t\t}\n\n\t\treturn 0;\n\n\t}\n\n\t/**\n\t * Checks if the current or specified slide is vertical\n\t * (nested within another slide).\n\t *\n\t * @param {HTMLElement} [slide=currentSlide] The slide to check\n\t * orientation of\n\t * @return {Boolean}\n\t */\n\tfunction isVerticalSlide( slide = currentSlide ) {\n\n\t\treturn slide && slide.parentNode && !!slide.parentNode.nodeName.match( /section/i );\n\n\t}\n\n\t/**\n\t * Checks if the current or specified slide is a stack containing\n\t * vertical slides.\n\t *\n\t * @param {HTMLElement} [slide=currentSlide]\n\t * @return {Boolean}\n\t */\n\tfunction isVerticalStack( slide = currentSlide ) {\n\n\t\treturn slide.classList.contains( '.stack' ) || slide.querySelector( 'section' ) !== null;\n\n\t}\n\n\t/**\n\t * Returns true if we're on the last slide in the current\n\t * vertical stack.\n\t */\n\tfunction isLastVerticalSlide() {\n\n\t\tif( currentSlide && isVerticalSlide( currentSlide ) ) {\n\t\t\t// Does this slide have a next sibling?\n\t\t\tif( currentSlide.nextElementSibling ) return false;\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Returns true if we're currently on the first slide in\n\t * the presentation.\n\t */\n\tfunction isFirstSlide() {\n\n\t\treturn indexh === 0 && indexv === 0;\n\n\t}\n\n\t/**\n\t * Returns true if we're currently on the last slide in\n\t * the presenation. If the last slide is a stack, we only\n\t * consider this the last slide if it's at the end of the\n\t * stack.\n\t */\n\tfunction isLastSlide() {\n\n\t\tif( currentSlide ) {\n\t\t\t// Does this slide have a next sibling?\n\t\t\tif( currentSlide.nextElementSibling ) return false;\n\n\t\t\t// If it's vertical, does its parent have a next sibling?\n\t\t\tif( isVerticalSlide( currentSlide ) && currentSlide.parentNode.nextElementSibling ) return false;\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\t/**\n\t * Enters the paused mode which fades everything on screen to\n\t * black.\n\t */\n\tfunction pause() {\n\n\t\tif( config.pause ) {\n\t\t\tconst wasPaused = dom.wrapper.classList.contains( 'paused' );\n\n\t\t\tcancelAutoSlide();\n\t\t\tdom.wrapper.classList.add( 'paused' );\n\n\t\t\tif( wasPaused === false ) {\n\t\t\t\tdispatchEvent({ type: 'paused' });\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Exits from the paused mode.\n\t */\n\tfunction resume() {\n\n\t\tconst wasPaused = dom.wrapper.classList.contains( 'paused' );\n\t\tdom.wrapper.classList.remove( 'paused' );\n\n\t\tcueAutoSlide();\n\n\t\tif( wasPaused ) {\n\t\t\tdispatchEvent({ type: 'resumed' });\n\t\t}\n\n\t}\n\n\t/**\n\t * Toggles the paused mode on and off.\n\t */\n\tfunction togglePause( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? pause() : resume();\n\t\t}\n\t\telse {\n\t\t\tisPaused() ? resume() : pause();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if we are currently in the paused mode.\n\t *\n\t * @return {Boolean}\n\t */\n\tfunction isPaused() {\n\n\t\treturn dom.wrapper.classList.contains( 'paused' );\n\n\t}\n\n\t/**\n\t * Toggles visibility of the jump-to-slide UI.\n\t */\n\tfunction toggleJumpToSlide( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? jumpToSlide.show() : jumpToSlide.hide();\n\t\t}\n\t\telse {\n\t\t\tjumpToSlide.isVisible() ? jumpToSlide.hide() : jumpToSlide.show();\n\t\t}\n\n\t}\n\n\t/**\n\t * Toggles the auto slide mode on and off.\n\t *\n\t * @param {Boolean} [override] Flag which sets the desired state.\n\t * True means autoplay starts, false means it stops.\n\t */\n\n\tfunction toggleAutoSlide( override ) {\n\n\t\tif( typeof override === 'boolean' ) {\n\t\t\toverride ? resumeAutoSlide() : pauseAutoSlide();\n\t\t}\n\n\t\telse {\n\t\t\tautoSlidePaused ? resumeAutoSlide() : pauseAutoSlide();\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks if the auto slide mode is currently on.\n\t *\n\t * @return {Boolean}\n\t */\n\tfunction isAutoSliding() {\n\n\t\treturn !!( autoSlide && !autoSlidePaused );\n\n\t}\n\n\t/**\n\t * Steps from the current point in the presentation to the\n\t * slide which matches the specified horizontal and vertical\n\t * indices.\n\t *\n\t * @param {number} [h=indexh] Horizontal index of the target slide\n\t * @param {number} [v=indexv] Vertical index of the target slide\n\t * @param {number} [f] Index of a fragment within the\n\t * target slide to activate\n\t * @param {number} [origin] Origin for use in multimaster environments\n\t */\n\tfunction slide( h, v, f, origin ) {\n\n\t\t// Dispatch an event before the slide\n\t\tconst slidechange = dispatchEvent({\n\t\t\ttype: 'beforeslidechange',\n\t\t\tdata: {\n\t\t\t\tindexh: h === undefined ? indexh : h,\n\t\t\t\tindexv: v === undefined ? indexv : v,\n\t\t\t\torigin\n\t\t\t}\n\t\t});\n\n\t\t// Abort if this slide change was prevented by an event listener\n\t\tif( slidechange.defaultPrevented ) return;\n\n\t\t// Remember where we were at before\n\t\tpreviousSlide = currentSlide;\n\n\t\t// Query all horizontal slides in the deck\n\t\tconst horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );\n\n\t\t// If we're in scroll mode, we scroll the target slide into view\n\t\t// instead of running our standard slide transition\n\t\tif( scrollView.isActive() ) {\n\t\t\tconst scrollToSlide = scrollView.getSlideByIndices( h, v );\n\t\t\tif( scrollToSlide ) scrollView.scrollToSlide( scrollToSlide );\n\t\t\treturn;\n\t\t}\n\n\t\t// Abort if there are no slides\n\t\tif( horizontalSlides.length === 0 ) return;\n\n\t\t// If no vertical index is specified and the upcoming slide is a\n\t\t// stack, resume at its previous vertical index\n\t\tif( v === undefined && !overview.isActive() ) {\n\t\t\tv = getPreviousVerticalIndex( horizontalSlides[ h ] );\n\t\t}\n\n\t\t// If we were on a vertical stack, remember what vertical index\n\t\t// it was on so we can resume at the same position when returning\n\t\tif( previousSlide && previousSlide.parentNode && previousSlide.parentNode.classList.contains( 'stack' ) ) {\n\t\t\tsetPreviousVerticalIndex( previousSlide.parentNode, indexv );\n\t\t}\n\n\t\t// Remember the state before this slide\n\t\tconst stateBefore = state.concat();\n\n\t\t// Reset the state array\n\t\tstate.length = 0;\n\n\t\tlet indexhBefore = indexh || 0,\n\t\t\tindexvBefore = indexv || 0;\n\n\t\t// Activate and transition to the new slide\n\t\tindexh = updateSlides( HORIZONTAL_SLIDES_SELECTOR, h === undefined ? indexh : h );\n\t\tindexv = updateSlides( VERTICAL_SLIDES_SELECTOR, v === undefined ? indexv : v );\n\n\t\t// Dispatch an event if the slide changed\n\t\tlet slideChanged = ( indexh !== indexhBefore || indexv !== indexvBefore );\n\n\t\t// Ensure that the previous slide is never the same as the current\n\t\tif( !slideChanged ) previousSlide = null;\n\n\t\t// Find the current horizontal slide and any possible vertical slides\n\t\t// within it\n\t\tlet currentHorizontalSlide = horizontalSlides[ indexh ],\n\t\t\tcurrentVerticalSlides = currentHorizontalSlide.querySelectorAll( 'section' );\n\n\t\t// Indicate when we're on a vertical slide\n\t\trevealElement.classList.toggle( 'is-vertical-slide', currentVerticalSlides.length > 1 );\n\n\t\t// Store references to the previous and current slides\n\t\tcurrentSlide = currentVerticalSlides[ indexv ] || currentHorizontalSlide;\n\n\t\tlet autoAnimateTransition = false;\n\n\t\t// Detect if we're moving between two auto-animated slides\n\t\tif( slideChanged && previousSlide && currentSlide && !overview.isActive() ) {\n\t\t\ttransition = 'running';\n\n\t\t\tautoAnimateTransition = shouldAutoAnimateBetween( previousSlide, currentSlide, indexhBefore, indexvBefore );\n\n\t\t\t// If this is an auto-animated transition, we disable the\n\t\t\t// regular slide transition\n\t\t\t//\n\t\t\t// Note 20-03-2020:\n\t\t\t// This needs to happen before we update slide visibility,\n\t\t\t// otherwise transitions will still run in Safari.\n\t\t\tif( autoAnimateTransition ) {\n\t\t\t\tdom.slides.classList.add( 'disable-slide-transitions' )\n\t\t\t}\n\t\t}\n\n\t\t// Update the visibility of slides now that the indices have changed\n\t\tupdateSlidesVisibility();\n\n\t\tlayout();\n\n\t\t// Update the overview if it's currently active\n\t\tif( overview.isActive() ) {\n\t\t\toverview.update();\n\t\t}\n\n\t\t// Show fragment, if specified\n\t\tif( typeof f !== 'undefined' ) {\n\t\t\tfragments.goto( f );\n\t\t}\n\n\t\t// Solves an edge case where the previous slide maintains the\n\t\t// 'present' class when navigating between adjacent vertical\n\t\t// stacks\n\t\tif( previousSlide && previousSlide !== currentSlide ) {\n\t\t\tpreviousSlide.classList.remove( 'present' );\n\t\t\tpreviousSlide.setAttribute( 'aria-hidden', 'true' );\n\n\t\t\t// Reset all slides upon navigate to home\n\t\t\tif( isFirstSlide() ) {\n\t\t\t\t// Launch async task\n\t\t\t\tsetTimeout( () => {\n\t\t\t\t\tgetVerticalStacks().forEach( slide => {\n\t\t\t\t\t\tsetPreviousVerticalIndex( slide, 0 );\n\t\t\t\t\t} );\n\t\t\t\t}, 0 );\n\t\t\t}\n\t\t}\n\n\t\t// Apply the new state\n\t\tstateLoop: for( let i = 0, len = state.length; i < len; i++ ) {\n\t\t\t// Check if this state existed on the previous slide. If it\n\t\t\t// did, we will avoid adding it repeatedly\n\t\t\tfor( let j = 0; j < stateBefore.length; j++ ) {\n\t\t\t\tif( stateBefore[j] === state[i] ) {\n\t\t\t\t\tstateBefore.splice( j, 1 );\n\t\t\t\t\tcontinue stateLoop;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tdom.viewport.classList.add( state[i] );\n\n\t\t\t// Dispatch custom event matching the state's name\n\t\t\tdispatchEvent({ type: state[i] });\n\t\t}\n\n\t\t// Clean up the remains of the previous state\n\t\twhile( stateBefore.length ) {\n\t\t\tdom.viewport.classList.remove( stateBefore.pop() );\n\t\t}\n\n\t\tif( slideChanged ) {\n\t\t\tdispatchSlideChanged( origin );\n\t\t}\n\n\t\t// Handle embedded content\n\t\tif( slideChanged || !previousSlide ) {\n\t\t\tslideContent.stopEmbeddedContent( previousSlide );\n\t\t\tslideContent.startEmbeddedContent( currentSlide );\n\t\t}\n\n\t\t// Announce the current slide contents to screen readers\n\t\t// Use animation frame to prevent getComputedStyle in getStatusText\n\t\t// from triggering layout mid-frame\n\t\trequestAnimationFrame( () => {\n\t\t\tannounceStatus( getStatusText( currentSlide ) );\n\t\t});\n\n\t\tprogress.update();\n\t\tcontrols.update();\n\t\tnotes.update();\n\t\tbackgrounds.update();\n\t\tbackgrounds.updateParallax();\n\t\tslideNumber.update();\n\t\tfragments.update();\n\n\t\t// Update the URL hash\n\t\tlocation.writeURL();\n\n\t\tcueAutoSlide();\n\n\t\t// Auto-animation\n\t\tif( autoAnimateTransition ) {\n\n\t\t\tsetTimeout( () => {\n\t\t\t\tdom.slides.classList.remove( 'disable-slide-transitions' );\n\t\t\t}, 0 );\n\n\t\t\tif( config.autoAnimate ) {\n\t\t\t\t// Run the auto-animation between our slides\n\t\t\t\tautoAnimate.run( previousSlide, currentSlide );\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Checks whether or not an auto-animation should take place between\n\t * the two given slides.\n\t *\n\t * @param {HTMLElement} fromSlide\n\t * @param {HTMLElement} toSlide\n\t * @param {number} indexhBefore\n\t * @param {number} indexvBefore\n\t *\n\t * @returns {boolean}\n\t */\n\tfunction shouldAutoAnimateBetween( fromSlide, toSlide, indexhBefore, indexvBefore ) {\n\n\t\treturn \tfromSlide.hasAttribute( 'data-auto-animate' ) && toSlide.hasAttribute( 'data-auto-animate' ) &&\n\t\t\t\tfromSlide.getAttribute( 'data-auto-animate-id' ) === toSlide.getAttribute( 'data-auto-animate-id' ) &&\n\t\t\t\t!( ( indexh > indexhBefore || indexv > indexvBefore ) ? toSlide : fromSlide ).hasAttribute( 'data-auto-animate-restart' );\n\n\t}\n\n\t/**\n\t * Called anytime a new slide should be activated while in the scroll\n\t * view. The active slide is the page that occupies the most space in\n\t * the scrollable viewport.\n\t *\n\t * @param {number} pageIndex\n\t * @param {HTMLElement} slideElement\n\t */\n\tfunction setCurrentScrollPage( slideElement, h, v ) {\n\n\t\tlet indexhBefore = indexh || 0;\n\n\t\tindexh = h;\n\t\tindexv = v;\n\n\t\tconst slideChanged = currentSlide !== slideElement;\n\n\t\tpreviousSlide = currentSlide;\n\t\tcurrentSlide = slideElement;\n\n\t\tif( currentSlide && previousSlide ) {\n\t\t\tif( config.autoAnimate && shouldAutoAnimateBetween( previousSlide, currentSlide, indexhBefore, indexv ) ) {\n\t\t\t\t// Run the auto-animation between our slides\n\t\t\t\tautoAnimate.run( previousSlide, currentSlide );\n\t\t\t}\n\t\t}\n\n\t\t// Start or stop embedded content like videos and iframes\n\t\tif( slideChanged ) {\n\t\t\tif( previousSlide ) {\n\t\t\t\tslideContent.stopEmbeddedContent( previousSlide );\n\t\t\t\tslideContent.stopEmbeddedContent( previousSlide.slideBackgroundElement );\n\t\t\t}\n\n\t\t\tslideContent.startEmbeddedContent( currentSlide );\n\t\t\tslideContent.startEmbeddedContent( currentSlide.slideBackgroundElement );\n\t\t}\n\n\t\trequestAnimationFrame( () => {\n\t\t\tannounceStatus( getStatusText( currentSlide ) );\n\t\t});\n\n\t\tdispatchSlideChanged();\n\n\t}\n\n\t/**\n\t * Syncs the presentation with the current DOM. Useful\n\t * when new slides or control elements are added or when\n\t * the configuration has changed.\n\t */\n\tfunction sync() {\n\n\t\t// Subscribe to input\n\t\tremoveEventListeners();\n\t\taddEventListeners();\n\n\t\t// Force a layout to make sure the current config is accounted for\n\t\tlayout();\n\n\t\t// Reflect the current autoSlide value\n\t\tautoSlide = config.autoSlide;\n\n\t\t// Start auto-sliding if it's enabled\n\t\tcueAutoSlide();\n\n\t\t// Re-create all slide backgrounds\n\t\tbackgrounds.create();\n\n\t\t// Write the current hash to the URL\n\t\tlocation.writeURL();\n\n\t\tif( config.sortFragmentsOnSync === true ) {\n\t\t\tfragments.sortAll();\n\t\t}\n\n\t\tcontrols.update();\n\t\tprogress.update();\n\n\t\tupdateSlidesVisibility();\n\n\t\tnotes.update();\n\t\tnotes.updateVisibility();\n\t\tbackgrounds.update( true );\n\t\tslideNumber.update();\n\t\tslideContent.formatEmbeddedContent();\n\n\t\t// Start or stop embedded content depending on global config\n\t\tif( config.autoPlayMedia === false ) {\n\t\t\tslideContent.stopEmbeddedContent( currentSlide, { unloadIframes: false } );\n\t\t}\n\t\telse {\n\t\t\tslideContent.startEmbeddedContent( currentSlide );\n\t\t}\n\n\t\tif( overview.isActive() ) {\n\t\t\toverview.layout();\n\t\t}\n\n\t}\n\n\t/**\n\t * Updates reveal.js to keep in sync with new slide attributes. For\n\t * example, if you add a new `data-background-image` you can call\n\t * this to have reveal.js render the new background image.\n\t *\n\t * Similar to #sync() but more efficient when you only need to\n\t * refresh a specific slide.\n\t *\n\t * @param {HTMLElement} slide\n\t */\n\tfunction syncSlide( slide = currentSlide ) {\n\n\t\tbackgrounds.sync( slide );\n\t\tfragments.sync( slide );\n\n\t\tslideContent.load( slide );\n\n\t\tbackgrounds.update();\n\t\tnotes.update();\n\n\t}\n\n\t/**\n\t * Resets all vertical slides so that only the first\n\t * is visible.\n\t */\n\tfunction resetVerticalSlides() {\n\n\t\tgetHorizontalSlides().forEach( horizontalSlide => {\n\n\t\t\tUtil.queryAll( horizontalSlide, 'section' ).forEach( ( verticalSlide, y ) => {\n\n\t\t\t\tif( y > 0 ) {\n\t\t\t\t\tverticalSlide.classList.remove( 'present' );\n\t\t\t\t\tverticalSlide.classList.remove( 'past' );\n\t\t\t\t\tverticalSlide.classList.add( 'future' );\n\t\t\t\t\tverticalSlide.setAttribute( 'aria-hidden', 'true' );\n\t\t\t\t}\n\n\t\t\t} );\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Randomly shuffles all slides in the deck.\n\t */\n\tfunction shuffle( slides = getHorizontalSlides() ) {\n\n\t\tslides.forEach( ( slide, i ) => {\n\n\t\t\t// Insert the slide next to a randomly picked sibling slide\n\t\t\t// slide. This may cause the slide to insert before itself,\n\t\t\t// but that's not an issue.\n\t\t\tlet beforeSlide = slides[ Math.floor( Math.random() * slides.length ) ];\n\t\t\tif( beforeSlide.parentNode === slide.parentNode ) {\n\t\t\t\tslide.parentNode.insertBefore( slide, beforeSlide );\n\t\t\t}\n\n\t\t\t// Randomize the order of vertical slides (if there are any)\n\t\t\tlet verticalSlides = slide.querySelectorAll( 'section' );\n\t\t\tif( verticalSlides.length ) {\n\t\t\t\tshuffle( verticalSlides );\n\t\t\t}\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Updates one dimension of slides by showing the slide\n\t * with the specified index.\n\t *\n\t * @param {string} selector A CSS selector that will fetch\n\t * the group of slides we are working with\n\t * @param {number} index The index of the slide that should be\n\t * shown\n\t *\n\t * @return {number} The index of the slide that is now shown,\n\t * might differ from the passed in index if it was out of\n\t * bounds.\n\t */\n\tfunction updateSlides( selector, index ) {\n\n\t\t// Select all slides and convert the NodeList result to\n\t\t// an array\n\t\tlet slides = Util.queryAll( dom.wrapper, selector ),\n\t\t\tslidesLength = slides.length;\n\n\t\tlet printMode = scrollView.isActive() || printView.isActive();\n\t\tlet loopedForwards = false;\n\t\tlet loopedBackwards = false;\n\n\t\tif( slidesLength ) {\n\n\t\t\t// Should the index loop?\n\t\t\tif( config.loop ) {\n\t\t\t\tif( index >= slidesLength ) loopedForwards = true;\n\n\t\t\t\tindex %= slidesLength;\n\n\t\t\t\tif( index < 0 ) {\n\t\t\t\t\tindex = slidesLength + index;\n\t\t\t\t\tloopedBackwards = true;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Enforce max and minimum index bounds\n\t\t\tindex = Math.max( Math.min( index, slidesLength - 1 ), 0 );\n\n\t\t\tfor( let i = 0; i < slidesLength; i++ ) {\n\t\t\t\tlet element = slides[i];\n\n\t\t\t\tlet reverse = config.rtl && !isVerticalSlide( element );\n\n\t\t\t\t// Avoid .remove() with multiple args for IE11 support\n\t\t\t\telement.classList.remove( 'past' );\n\t\t\t\telement.classList.remove( 'present' );\n\t\t\t\telement.classList.remove( 'future' );\n\n\t\t\t\t// http://www.w3.org/html/wg/drafts/html/master/editing.html#the-hidden-attribute\n\t\t\t\telement.setAttribute( 'hidden', '' );\n\t\t\t\telement.setAttribute( 'aria-hidden', 'true' );\n\n\t\t\t\t// If this element contains vertical slides\n\t\t\t\tif( element.querySelector( 'section' ) ) {\n\t\t\t\t\telement.classList.add( 'stack' );\n\t\t\t\t}\n\n\t\t\t\t// If we're printing static slides, all slides are \"present\"\n\t\t\t\tif( printMode ) {\n\t\t\t\t\telement.classList.add( 'present' );\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\tif( i < index ) {\n\t\t\t\t\t// Any element previous to index is given the 'past' class\n\t\t\t\t\telement.classList.add( reverse ? 'future' : 'past' );\n\n\t\t\t\t\tif( config.fragments ) {\n\t\t\t\t\t\t// Show all fragments in prior slides\n\t\t\t\t\t\tshowFragmentsIn( element );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if( i > index ) {\n\t\t\t\t\t// Any element subsequent to index is given the 'future' class\n\t\t\t\t\telement.classList.add( reverse ? 'past' : 'future' );\n\n\t\t\t\t\tif( config.fragments ) {\n\t\t\t\t\t\t// Hide all fragments in future slides\n\t\t\t\t\t\thideFragmentsIn( element );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t// Update the visibility of fragments when a presentation loops\n\t\t\t\t// in either direction\n\t\t\t\telse if( i === index && config.fragments ) {\n\t\t\t\t\tif( loopedForwards ) {\n\t\t\t\t\t\thideFragmentsIn( element );\n\t\t\t\t\t}\n\t\t\t\t\telse if( loopedBackwards ) {\n\t\t\t\t\t\tshowFragmentsIn( element );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tlet slide = slides[index];\n\t\t\tlet wasPresent = slide.classList.contains( 'present' );\n\n\t\t\t// Mark the current slide as present\n\t\t\tslide.classList.add( 'present' );\n\t\t\tslide.removeAttribute( 'hidden' );\n\t\t\tslide.removeAttribute( 'aria-hidden' );\n\n\t\t\tif( !wasPresent ) {\n\t\t\t\t// Dispatch an event indicating the slide is now visible\n\t\t\t\tdispatchEvent({\n\t\t\t\t\ttarget: slide,\n\t\t\t\t\ttype: 'visible',\n\t\t\t\t\tbubbles: false\n\t\t\t\t});\n\t\t\t}\n\n\t\t\t// If this slide has a state associated with it, add it\n\t\t\t// onto the current state of the deck\n\t\t\tlet slideState = slide.getAttribute( 'data-state' );\n\t\t\tif( slideState ) {\n\t\t\t\tstate = state.concat( slideState.split( ' ' ) );\n\t\t\t}\n\n\t\t}\n\t\telse {\n\t\t\t// Since there are no slides we can't be anywhere beyond the\n\t\t\t// zeroth index\n\t\t\tindex = 0;\n\t\t}\n\n\t\treturn index;\n\n\t}\n\n\t/**\n\t * Shows all fragment elements within the given container.\n\t */\n\tfunction showFragmentsIn( container ) {\n\n\t\tUtil.queryAll( container, '.fragment' ).forEach( fragment => {\n\t\t\tfragment.classList.add( 'visible' );\n\t\t\tfragment.classList.remove( 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Hides all fragment elements within the given container.\n\t */\n\tfunction hideFragmentsIn( container ) {\n\n\t\tUtil.queryAll( container, '.fragment.visible' ).forEach( fragment => {\n\t\t\tfragment.classList.remove( 'visible', 'current-fragment' );\n\t\t} );\n\n\t}\n\n\t/**\n\t * Optimization method; hide all slides that are far away\n\t * from the present slide.\n\t */\n\tfunction updateSlidesVisibility() {\n\n\t\t// Select all slides and convert the NodeList result to\n\t\t// an array\n\t\tlet horizontalSlides = getHorizontalSlides(),\n\t\t\thorizontalSlidesLength = horizontalSlides.length,\n\t\t\tdistanceX,\n\t\t\tdistanceY;\n\n\t\tif( horizontalSlidesLength && typeof indexh !== 'undefined' ) {\n\n\t\t\t// The number of steps away from the present slide that will\n\t\t\t// be visible\n\t\t\tlet viewDistance = overview.isActive() ? 10 : config.viewDistance;\n\n\t\t\t// Shorten the view distance on devices that typically have\n\t\t\t// less resources\n\t\t\tif( Device.isMobile ) {\n\t\t\t\tviewDistance = overview.isActive() ? 6 : config.mobileViewDistance;\n\t\t\t}\n\n\t\t\t// All slides need to be visible when exporting to PDF\n\t\t\tif( printView.isActive() ) {\n\t\t\t\tviewDistance = Number.MAX_VALUE;\n\t\t\t}\n\n\t\t\tfor( let x = 0; x < horizontalSlidesLength; x++ ) {\n\t\t\t\tlet horizontalSlide = horizontalSlides[x];\n\n\t\t\t\tlet verticalSlides = Util.queryAll( horizontalSlide, 'section' ),\n\t\t\t\t\tverticalSlidesLength = verticalSlides.length;\n\n\t\t\t\t// Determine how far away this slide is from the present\n\t\t\t\tdistanceX = Math.abs( ( indexh || 0 ) - x ) || 0;\n\n\t\t\t\t// If the presentation is looped, distance should measure\n\t\t\t\t// 1 between the first and last slides\n\t\t\t\tif( config.loop ) {\n\t\t\t\t\tdistanceX = Math.abs( ( ( indexh || 0 ) - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0;\n\t\t\t\t}\n\n\t\t\t\t// Show the horizontal slide if it's within the view distance\n\t\t\t\tif( distanceX < viewDistance ) {\n\t\t\t\t\tslideContent.load( horizontalSlide );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tslideContent.unload( horizontalSlide );\n\t\t\t\t}\n\n\t\t\t\tif( verticalSlidesLength ) {\n\n\t\t\t\t\tlet oy = getPreviousVerticalIndex( horizontalSlide );\n\n\t\t\t\t\tfor( let y = 0; y < verticalSlidesLength; y++ ) {\n\t\t\t\t\t\tlet verticalSlide = verticalSlides[y];\n\n\t\t\t\t\t\tdistanceY = x === ( indexh || 0 ) ? Math.abs( ( indexv || 0 ) - y ) : Math.abs( y - oy );\n\n\t\t\t\t\t\tif( distanceX + distanceY < viewDistance ) {\n\t\t\t\t\t\t\tslideContent.load( verticalSlide );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tslideContent.unload( verticalSlide );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Flag if there are ANY vertical slides, anywhere in the deck\n\t\t\tif( hasVerticalSlides() ) {\n\t\t\t\tdom.wrapper.classList.add( 'has-vertical-slides' );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tdom.wrapper.classList.remove( 'has-vertical-slides' );\n\t\t\t}\n\n\t\t\t// Flag if there are ANY horizontal slides, anywhere in the deck\n\t\t\tif( hasHorizontalSlides() ) {\n\t\t\t\tdom.wrapper.classList.add( 'has-horizontal-slides' );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tdom.wrapper.classList.remove( 'has-horizontal-slides' );\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Determine what available routes there are for navigation.\n\t *\n\t * @return {{left: boolean, right: boolean, up: boolean, down: boolean}}\n\t */\n\tfunction availableRoutes({ includeFragments = false } = {}) {\n\n\t\tlet horizontalSlides = dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ),\n\t\t\tverticalSlides = dom.wrapper.querySelectorAll( VERTICAL_SLIDES_SELECTOR );\n\n\t\tlet routes = {\n\t\t\tleft: indexh > 0,\n\t\t\tright: indexh < horizontalSlides.length - 1,\n\t\t\tup: indexv > 0,\n\t\t\tdown: indexv < verticalSlides.length - 1\n\t\t};\n\n\t\t// Looped presentations can always be navigated as long as\n\t\t// there are slides available\n\t\tif( config.loop ) {\n\t\t\tif( horizontalSlides.length > 1 ) {\n\t\t\t\troutes.left = true;\n\t\t\t\troutes.right = true;\n\t\t\t}\n\n\t\t\tif( verticalSlides.length > 1 ) {\n\t\t\t\troutes.up = true;\n\t\t\t\troutes.down = true;\n\t\t\t}\n\t\t}\n\n\t\tif ( horizontalSlides.length > 1 && config.navigationMode === 'linear' ) {\n\t\t\troutes.right = routes.right || routes.down;\n\t\t\troutes.left = routes.left || routes.up;\n\t\t}\n\n\t\t// If includeFragments is set, a route will be considered\n\t\t// available if either a slid OR fragment is available in\n\t\t// the given direction\n\t\tif( includeFragments === true ) {\n\t\t\tlet fragmentRoutes = fragments.availableRoutes();\n\t\t\troutes.left = routes.left || fragmentRoutes.prev;\n\t\t\troutes.up = routes.up || fragmentRoutes.prev;\n\t\t\troutes.down = routes.down || fragmentRoutes.next;\n\t\t\troutes.right = routes.right || fragmentRoutes.next;\n\t\t}\n\n\t\t// Reverse horizontal controls for rtl\n\t\tif( config.rtl ) {\n\t\t\tlet left = routes.left;\n\t\t\troutes.left = routes.right;\n\t\t\troutes.right = left;\n\t\t}\n\n\t\treturn routes;\n\n\t}\n\n\t/**\n\t * Returns the number of past slides. This can be used as a global\n\t * flattened index for slides.\n\t *\n\t * @param {HTMLElement} [slide=currentSlide] The slide we're counting before\n\t *\n\t * @return {number} Past slide count\n\t */\n\tfunction getSlidePastCount( slide = currentSlide ) {\n\n\t\tlet horizontalSlides = getHorizontalSlides();\n\n\t\t// The number of past slides\n\t\tlet pastCount = 0;\n\n\t\t// Step through all slides and count the past ones\n\t\tmainLoop: for( let i = 0; i < horizontalSlides.length; i++ ) {\n\n\t\t\tlet horizontalSlide = horizontalSlides[i];\n\t\t\tlet verticalSlides = horizontalSlide.querySelectorAll( 'section' );\n\n\t\t\tfor( let j = 0; j < verticalSlides.length; j++ ) {\n\n\t\t\t\t// Stop as soon as we arrive at the present\n\t\t\t\tif( verticalSlides[j] === slide ) {\n\t\t\t\t\tbreak mainLoop;\n\t\t\t\t}\n\n\t\t\t\t// Don't count slides with the \"uncounted\" class\n\t\t\t\tif( verticalSlides[j].dataset.visibility !== 'uncounted' ) {\n\t\t\t\t\tpastCount++;\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// Stop as soon as we arrive at the present\n\t\t\tif( horizontalSlide === slide ) {\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\t// Don't count the wrapping section for vertical slides and\n\t\t\t// slides marked as uncounted\n\t\t\tif( horizontalSlide.classList.contains( 'stack' ) === false && horizontalSlide.dataset.visibility !== 'uncounted' ) {\n\t\t\t\tpastCount++;\n\t\t\t}\n\n\t\t}\n\n\t\treturn pastCount;\n\n\t}\n\n\t/**\n\t * Returns a value ranging from 0-1 that represents\n\t * how far into the presentation we have navigated.\n\t *\n\t * @return {number}\n\t */\n\tfunction getProgress() {\n\n\t\t// The number of past and total slides\n\t\tlet totalCount = getTotalSlides();\n\t\tlet pastCount = getSlidePastCount();\n\n\t\tif( currentSlide ) {\n\n\t\t\tlet allFragments = currentSlide.querySelectorAll( '.fragment' );\n\n\t\t\t// If there are fragments in the current slide those should be\n\t\t\t// accounted for in the progress.\n\t\t\tif( allFragments.length > 0 ) {\n\t\t\t\tlet visibleFragments = currentSlide.querySelectorAll( '.fragment.visible' );\n\n\t\t\t\t// This value represents how big a portion of the slide progress\n\t\t\t\t// that is made up by its fragments (0-1)\n\t\t\t\tlet fragmentWeight = 0.9;\n\n\t\t\t\t// Add fragment progress to the past slide count\n\t\t\t\tpastCount += ( visibleFragments.length / allFragments.length ) * fragmentWeight;\n\t\t\t}\n\n\t\t}\n\n\t\treturn Math.min( pastCount / ( totalCount - 1 ), 1 );\n\n\t}\n\n\t/**\n\t * Retrieves the h/v location and fragment of the current,\n\t * or specified, slide.\n\t *\n\t * @param {HTMLElement} [slide] If specified, the returned\n\t * index will be for this slide rather than the currently\n\t * active one\n\t *\n\t * @return {{h: number, v: number, f: number}}\n\t */\n\tfunction getIndices( slide ) {\n\n\t\t// By default, return the current indices\n\t\tlet h = indexh,\n\t\t\tv = indexv,\n\t\t\tf;\n\n\t\t// If a slide is specified, return the indices of that slide\n\t\tif( slide ) {\n\t\t\t// In scroll mode the original h/x index is stored on the slide\n\t\t\tif( scrollView.isActive() ) {\n\t\t\t\th = parseInt( slide.getAttribute( 'data-index-h' ), 10 );\n\n\t\t\t\tif( slide.getAttribute( 'data-index-v' ) ) {\n\t\t\t\t\tv = parseInt( slide.getAttribute( 'data-index-v' ), 10 );\n\t\t\t\t}\n\t\t\t}\n\t\t\telse {\n\t\t\t\tlet isVertical = isVerticalSlide( slide );\n\t\t\t\tlet slideh = isVertical ? slide.parentNode : slide;\n\n\t\t\t\t// Select all horizontal slides\n\t\t\t\tlet horizontalSlides = getHorizontalSlides();\n\n\t\t\t\t// Now that we know which the horizontal slide is, get its index\n\t\t\t\th = Math.max( horizontalSlides.indexOf( slideh ), 0 );\n\n\t\t\t\t// Assume we're not vertical\n\t\t\t\tv = undefined;\n\n\t\t\t\t// If this is a vertical slide, grab the vertical index\n\t\t\t\tif( isVertical ) {\n\t\t\t\t\tv = Math.max( Util.queryAll( slide.parentNode, 'section' ).indexOf( slide ), 0 );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif( !slide && currentSlide ) {\n\t\t\tlet hasFragments = currentSlide.querySelectorAll( '.fragment' ).length > 0;\n\t\t\tif( hasFragments ) {\n\t\t\t\tlet currentFragment = currentSlide.querySelector( '.current-fragment' );\n\t\t\t\tif( currentFragment && currentFragment.hasAttribute( 'data-fragment-index' ) ) {\n\t\t\t\t\tf = parseInt( currentFragment.getAttribute( 'data-fragment-index' ), 10 );\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tf = currentSlide.querySelectorAll( '.fragment.visible' ).length - 1;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn { h, v, f };\n\n\t}\n\n\t/**\n\t * Retrieves all slides in this presentation.\n\t */\n\tfunction getSlides() {\n\n\t\treturn Util.queryAll( dom.wrapper, SLIDES_SELECTOR + ':not(.stack):not([data-visibility=\"uncounted\"])' );\n\n\t}\n\n\t/**\n\t * Returns a list of all horizontal slides in the deck. Each\n\t * vertical stack is included as one horizontal slide in the\n\t * resulting array.\n\t */\n\tfunction getHorizontalSlides() {\n\n\t\treturn Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR );\n\n\t}\n\n\t/**\n\t * Returns all vertical slides that exist within this deck.\n\t */\n\tfunction getVerticalSlides() {\n\n\t\treturn Util.queryAll( dom.wrapper, '.slides>section>section' );\n\n\t}\n\n\t/**\n\t * Returns all vertical stacks (each stack can contain multiple slides).\n\t */\n\tfunction getVerticalStacks() {\n\n\t\treturn Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.stack');\n\n\t}\n\n\t/**\n\t * Returns true if there are at least two horizontal slides.\n\t */\n\tfunction hasHorizontalSlides() {\n\n\t\treturn getHorizontalSlides().length > 1;\n\t}\n\n\t/**\n\t * Returns true if there are at least two vertical slides.\n\t */\n\tfunction hasVerticalSlides() {\n\n\t\treturn getVerticalSlides().length > 1;\n\n\t}\n\n\t/**\n\t * Returns an array of objects where each object represents the\n\t * attributes on its respective slide.\n\t */\n\tfunction getSlidesAttributes() {\n\n\t\treturn getSlides().map( slide => {\n\n\t\t\tlet attributes = {};\n\t\t\tfor( let i = 0; i < slide.attributes.length; i++ ) {\n\t\t\t\tlet attribute = slide.attributes[ i ];\n\t\t\t\tattributes[ attribute.name ] = attribute.value;\n\t\t\t}\n\t\t\treturn attributes;\n\n\t\t} );\n\n\t}\n\n\t/**\n\t * Retrieves the total number of slides in this presentation.\n\t *\n\t * @return {number}\n\t */\n\tfunction getTotalSlides() {\n\n\t\treturn getSlides().length;\n\n\t}\n\n\t/**\n\t * Returns the slide element matching the specified index.\n\t *\n\t * @return {HTMLElement}\n\t */\n\tfunction getSlide( x, y ) {\n\n\t\tlet horizontalSlide = getHorizontalSlides()[ x ];\n\t\tlet verticalSlides = horizontalSlide && horizontalSlide.querySelectorAll( 'section' );\n\n\t\tif( verticalSlides && verticalSlides.length && typeof y === 'number' ) {\n\t\t\treturn verticalSlides ? verticalSlides[ y ] : undefined;\n\t\t}\n\n\t\treturn horizontalSlide;\n\n\t}\n\n\t/**\n\t * Returns the background element for the given slide.\n\t * All slides, even the ones with no background properties\n\t * defined, have a background element so as long as the\n\t * index is valid an element will be returned.\n\t *\n\t * @param {mixed} x Horizontal background index OR a slide\n\t * HTML element\n\t * @param {number} y Vertical background index\n\t * @return {(HTMLElement[]|*)}\n\t */\n\tfunction getSlideBackground( x, y ) {\n\n\t\tlet slide = typeof x === 'number' ? getSlide( x, y ) : x;\n\t\tif( slide ) {\n\t\t\treturn slide.slideBackgroundElement;\n\t\t}\n\n\t\treturn undefined;\n\n\t}\n\n\t/**\n\t * Retrieves the current state of the presentation as\n\t * an object. This state can then be restored at any\n\t * time.\n\t *\n\t * @return {{indexh: number, indexv: number, indexf: number, paused: boolean, overview: boolean}}\n\t */\n\tfunction getState() {\n\n\t\tlet indices = getIndices();\n\n\t\treturn {\n\t\t\tindexh: indices.h,\n\t\t\tindexv: indices.v,\n\t\t\tindexf: indices.f,\n\t\t\tpaused: isPaused(),\n\t\t\toverview: overview.isActive()\n\t\t};\n\n\t}\n\n\t/**\n\t * Restores the presentation to the given state.\n\t *\n\t * @param {object} state As generated by getState()\n\t * @see {@link getState} generates the parameter `state`\n\t */\n\tfunction setState( state ) {\n\n\t\tif( typeof state === 'object' ) {\n\t\t\tslide( Util.deserialize( state.indexh ), Util.deserialize( state.indexv ), Util.deserialize( state.indexf ) );\n\n\t\t\tlet pausedFlag = Util.deserialize( state.paused ),\n\t\t\t\toverviewFlag = Util.deserialize( state.overview );\n\n\t\t\tif( typeof pausedFlag === 'boolean' && pausedFlag !== isPaused() ) {\n\t\t\t\ttogglePause( pausedFlag );\n\t\t\t}\n\n\t\t\tif( typeof overviewFlag === 'boolean' && overviewFlag !== overview.isActive() ) {\n\t\t\t\toverview.toggle( overviewFlag );\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Cues a new automated slide if enabled in the config.\n\t */\n\tfunction cueAutoSlide() {\n\n\t\tcancelAutoSlide();\n\n\t\tif( currentSlide && config.autoSlide !== false ) {\n\n\t\t\tlet fragment = currentSlide.querySelector( '.current-fragment[data-autoslide]' );\n\n\t\t\tlet fragmentAutoSlide = fragment ? fragment.getAttribute( 'data-autoslide' ) : null;\n\t\t\tlet parentAutoSlide = currentSlide.parentNode ? currentSlide.parentNode.getAttribute( 'data-autoslide' ) : null;\n\t\t\tlet slideAutoSlide = currentSlide.getAttribute( 'data-autoslide' );\n\n\t\t\t// Pick value in the following priority order:\n\t\t\t// 1. Current fragment's data-autoslide\n\t\t\t// 2. Current slide's data-autoslide\n\t\t\t// 3. Parent slide's data-autoslide\n\t\t\t// 4. Global autoSlide setting\n\t\t\tif( fragmentAutoSlide ) {\n\t\t\t\tautoSlide = parseInt( fragmentAutoSlide, 10 );\n\t\t\t}\n\t\t\telse if( slideAutoSlide ) {\n\t\t\t\tautoSlide = parseInt( slideAutoSlide, 10 );\n\t\t\t}\n\t\t\telse if( parentAutoSlide ) {\n\t\t\t\tautoSlide = parseInt( parentAutoSlide, 10 );\n\t\t\t}\n\t\t\telse {\n\t\t\t\tautoSlide = config.autoSlide;\n\n\t\t\t\t// If there are media elements with data-autoplay,\n\t\t\t\t// automatically set the autoSlide duration to the\n\t\t\t\t// length of that media. Not applicable if the slide\n\t\t\t\t// is divided up into fragments.\n\t\t\t\t// playbackRate is accounted for in the duration.\n\t\t\t\tif( currentSlide.querySelectorAll( '.fragment' ).length === 0 ) {\n\t\t\t\t\tUtil.queryAll( currentSlide, 'video, audio' ).forEach( el => {\n\t\t\t\t\t\tif( el.hasAttribute( 'data-autoplay' ) ) {\n\t\t\t\t\t\t\tif( autoSlide && (el.duration * 1000 / el.playbackRate ) > autoSlide ) {\n\t\t\t\t\t\t\t\tautoSlide = ( el.duration * 1000 / el.playbackRate ) + 1000;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Cue the next auto-slide if:\n\t\t\t// - There is an autoSlide value\n\t\t\t// - Auto-sliding isn't paused by the user\n\t\t\t// - The presentation isn't paused\n\t\t\t// - The overview isn't active\n\t\t\t// - The presentation isn't over\n\t\t\tif( autoSlide && !autoSlidePaused && !isPaused() && !overview.isActive() && ( !isLastSlide() || fragments.availableRoutes().next || config.loop === true ) ) {\n\t\t\t\tautoSlideTimeout = setTimeout( () => {\n\t\t\t\t\tif( typeof config.autoSlideMethod === 'function' ) {\n\t\t\t\t\t\tconfig.autoSlideMethod()\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tnavigateNext();\n\t\t\t\t\t}\n\t\t\t\t\tcueAutoSlide();\n\t\t\t\t}, autoSlide );\n\t\t\t\tautoSlideStartTime = Date.now();\n\t\t\t}\n\n\t\t\tif( autoSlidePlayer ) {\n\t\t\t\tautoSlidePlayer.setPlaying( autoSlideTimeout !== -1 );\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Cancels any ongoing request to auto-slide.\n\t */\n\tfunction cancelAutoSlide() {\n\n\t\tclearTimeout( autoSlideTimeout );\n\t\tautoSlideTimeout = -1;\n\n\t}\n\n\tfunction pauseAutoSlide() {\n\n\t\tif( autoSlide && !autoSlidePaused ) {\n\t\t\tautoSlidePaused = true;\n\t\t\tdispatchEvent({ type: 'autoslidepaused' });\n\t\t\tclearTimeout( autoSlideTimeout );\n\n\t\t\tif( autoSlidePlayer ) {\n\t\t\t\tautoSlidePlayer.setPlaying( false );\n\t\t\t}\n\t\t}\n\n\t}\n\n\tfunction resumeAutoSlide() {\n\n\t\tif( autoSlide && autoSlidePaused ) {\n\t\t\tautoSlidePaused = false;\n\t\t\tdispatchEvent({ type: 'autoslideresumed' });\n\t\t\tcueAutoSlide();\n\t\t}\n\n\t}\n\n\tfunction navigateLeft({skipFragments=false}={}) {\n\n\t\tnavigationHistory.hasNavigatedHorizontally = true;\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.prev();\n\n\t\t// Reverse for RTL\n\t\tif( config.rtl ) {\n\t\t\tif( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().left ) {\n\t\t\t\tslide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );\n\t\t\t}\n\t\t}\n\t\t// Normal navigation\n\t\telse if( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().left ) {\n\t\t\tslide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );\n\t\t}\n\n\t}\n\n\tfunction navigateRight({skipFragments=false}={}) {\n\n\t\tnavigationHistory.hasNavigatedHorizontally = true;\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.next();\n\n\t\t// Reverse for RTL\n\t\tif( config.rtl ) {\n\t\t\tif( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().right ) {\n\t\t\t\tslide( indexh - 1, config.navigationMode === 'grid' ? indexv : undefined );\n\t\t\t}\n\t\t}\n\t\t// Normal navigation\n\t\telse if( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().right ) {\n\t\t\tslide( indexh + 1, config.navigationMode === 'grid' ? indexv : undefined );\n\t\t}\n\n\t}\n\n\tfunction navigateUp({skipFragments=false}={}) {\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.prev();\n\n\t\t// Prioritize hiding fragments\n\t\tif( ( overview.isActive() || skipFragments || fragments.prev() === false ) && availableRoutes().up ) {\n\t\t\tslide( indexh, indexv - 1 );\n\t\t}\n\n\t}\n\n\tfunction navigateDown({skipFragments=false}={}) {\n\n\t\tnavigationHistory.hasNavigatedVertically = true;\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.next();\n\n\t\t// Prioritize revealing fragments\n\t\tif( ( overview.isActive() || skipFragments || fragments.next() === false ) && availableRoutes().down ) {\n\t\t\tslide( indexh, indexv + 1 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Navigates backwards, prioritized in the following order:\n\t * 1) Previous fragment\n\t * 2) Previous vertical slide\n\t * 3) Previous horizontal slide\n\t */\n\tfunction navigatePrev({skipFragments=false}={}) {\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.prev();\n\n\t\t// Prioritize revealing fragments\n\t\tif( skipFragments || fragments.prev() === false ) {\n\t\t\tif( availableRoutes().up ) {\n\t\t\t\tnavigateUp({skipFragments});\n\t\t\t}\n\t\t\telse {\n\t\t\t\t// Fetch the previous horizontal slide, if there is one\n\t\t\t\tlet previousSlide;\n\n\t\t\t\tif( config.rtl ) {\n\t\t\t\t\tpreviousSlide = Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.future' ).pop();\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tpreviousSlide = Util.queryAll( dom.wrapper, HORIZONTAL_SLIDES_SELECTOR + '.past' ).pop();\n\t\t\t\t}\n\n\t\t\t\t// When going backwards and arriving on a stack we start\n\t\t\t\t// at the bottom of the stack\n\t\t\t\tif( previousSlide && previousSlide.classList.contains( 'stack' ) ) {\n\t\t\t\t\tlet v = ( previousSlide.querySelectorAll( 'section' ).length - 1 ) || undefined;\n\t\t\t\t\tlet h = indexh - 1;\n\t\t\t\t\tslide( h, v );\n\t\t\t\t}\n\t\t\t\telse if( config.rtl ) {\n\t\t\t\t\tnavigateRight({skipFragments});\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tnavigateLeft({skipFragments});\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * The reverse of #navigatePrev().\n\t */\n\tfunction navigateNext({skipFragments=false}={}) {\n\n\t\tnavigationHistory.hasNavigatedHorizontally = true;\n\t\tnavigationHistory.hasNavigatedVertically = true;\n\n\t\t// Scroll view navigation is handled independently\n\t\tif( scrollView.isActive() ) return scrollView.next();\n\n\t\t// Prioritize revealing fragments\n\t\tif( skipFragments || fragments.next() === false ) {\n\n\t\t\tlet routes = availableRoutes();\n\n\t\t\t// When looping is enabled `routes.down` is always available\n\t\t\t// so we need a separate check for when we've reached the\n\t\t\t// end of a stack and should move horizontally\n\t\t\tif( routes.down && routes.right && config.loop && isLastVerticalSlide() ) {\n\t\t\t\troutes.down = false;\n\t\t\t}\n\n\t\t\tif( routes.down ) {\n\t\t\t\tnavigateDown({skipFragments});\n\t\t\t}\n\t\t\telse if( config.rtl ) {\n\t\t\t\tnavigateLeft({skipFragments});\n\t\t\t}\n\t\t\telse {\n\t\t\t\tnavigateRight({skipFragments});\n\t\t\t}\n\t\t}\n\n\t}\n\n\n\t// --------------------------------------------------------------------//\n\t// ----------------------------- EVENTS -------------------------------//\n\t// --------------------------------------------------------------------//\n\n\t/**\n\t * Called by all event handlers that are based on user\n\t * input.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onUserInput( event ) {\n\n\t\tif( config.autoSlideStoppable ) {\n\t\t\tpauseAutoSlide();\n\t\t}\n\n\t}\n\n\t/**\n\t* Listener for post message events posted to this window.\n\t*/\n\tfunction onPostMessage( event ) {\n\n\t\tlet data = event.data;\n\n\t\t// Make sure we're dealing with JSON\n\t\tif( typeof data === 'string' && data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) {\n\t\t\tdata = JSON.parse( data );\n\n\t\t\t// Check if the requested method can be found\n\t\t\tif( data.method && typeof Reveal[data.method] === 'function' ) {\n\n\t\t\t\tif( POST_MESSAGE_METHOD_BLACKLIST.test( data.method ) === false ) {\n\n\t\t\t\t\tconst result = Reveal[data.method].apply( Reveal, data.args );\n\n\t\t\t\t\t// Dispatch a postMessage event with the returned value from\n\t\t\t\t\t// our method invocation for getter functions\n\t\t\t\t\tdispatchPostMessage( 'callback', { method: data.method, result: result } );\n\n\t\t\t\t}\n\t\t\t\telse {\n\t\t\t\t\tconsole.warn( 'reveal.js: \"'+ data.method +'\" is is blacklisted from the postMessage API' );\n\t\t\t\t}\n\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Event listener for transition end on the current slide.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onTransitionEnd( event ) {\n\n\t\tif( transition === 'running' && /section/gi.test( event.target.nodeName ) ) {\n\t\t\ttransition = 'idle';\n\t\t\tdispatchEvent({\n\t\t\t\ttype: 'slidetransitionend',\n\t\t\t\tdata: { indexh, indexv, previousSlide, currentSlide }\n\t\t\t});\n\t\t}\n\n\t}\n\n\t/**\n\t * A global listener for all click events inside of the\n\t * .slides container.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onSlidesClicked( event ) {\n\n\t\tconst anchor = Util.closest( event.target, 'a[href^=\"#\"]' );\n\n\t\t// If a hash link is clicked, we find the target slide\n\t\t// and navigate to it. We previously relied on 'hashchange'\n\t\t// for links like these but that prevented media with\n\t\t// audio tracks from playing in mobile browsers since it\n\t\t// wasn't considered a direct interaction with the document.\n\t\tif( anchor ) {\n\t\t\tconst hash = anchor.getAttribute( 'href' );\n\t\t\tconst indices = location.getIndicesFromHash( hash );\n\n\t\t\tif( indices ) {\n\t\t\t\tReveal.slide( indices.h, indices.v, indices.f );\n\t\t\t\tevent.preventDefault();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Handler for the window level 'resize' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onWindowResize( event ) {\n\n\t\tlayout();\n\t}\n\n\t/**\n\t * Handle for the window level 'visibilitychange' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onPageVisibilityChange( event ) {\n\n\t\t// If, after clicking a link or similar and we're coming back,\n\t\t// focus the document.body to ensure we can use keyboard shortcuts\n\t\tif( document.hidden === false && document.activeElement !== document.body ) {\n\t\t\t// Not all elements support .blur() - SVGs among them.\n\t\t\tif( typeof document.activeElement.blur === 'function' ) {\n\t\t\t\tdocument.activeElement.blur();\n\t\t\t}\n\t\t\tdocument.body.focus();\n\t\t}\n\n\t}\n\n\t/**\n\t * Handler for the document level 'fullscreenchange' event.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onFullscreenChange( event ) {\n\n\t\tlet element = document.fullscreenElement || document.webkitFullscreenElement;\n\t\tif( element === dom.wrapper ) {\n\t\t\tevent.stopImmediatePropagation();\n\n\t\t\t// Timeout to avoid layout shift in Safari\n\t\t\tsetTimeout( () => {\n\t\t\t\tReveal.layout();\n\t\t\t\tReveal.focus.focus(); // focus.focus :'(\n\t\t\t}, 1 );\n\t\t}\n\n\t}\n\n\t/**\n\t * Handles clicks on links that are set to preview in the\n\t * iframe overlay.\n\t *\n\t * @param {object} event\n\t */\n\tfunction onPreviewLinkClicked( event ) {\n\n\t\tif( event.currentTarget && event.currentTarget.hasAttribute( 'href' ) ) {\n\t\t\tlet url = event.currentTarget.getAttribute( 'href' );\n\t\t\tif( url ) {\n\t\t\t\tshowPreview( url );\n\t\t\t\tevent.preventDefault();\n\t\t\t}\n\t\t}\n\n\t}\n\n\t/**\n\t * Handles click on the auto-sliding controls element.\n\t *\n\t * @param {object} [event]\n\t */\n\tfunction onAutoSlidePlayerClick( event ) {\n\n\t\t// Replay\n\t\tif( isLastSlide() && config.loop === false ) {\n\t\t\tslide( 0, 0 );\n\t\t\tresumeAutoSlide();\n\t\t}\n\t\t// Resume\n\t\telse if( autoSlidePaused ) {\n\t\t\tresumeAutoSlide();\n\t\t}\n\t\t// Pause\n\t\telse {\n\t\t\tpauseAutoSlide();\n\t\t}\n\n\t}\n\n\n\t// --------------------------------------------------------------------//\n\t// ------------------------------- API --------------------------------//\n\t// --------------------------------------------------------------------//\n\n\t// The public reveal.js API\n\tconst API = {\n\t\tVERSION,\n\n\t\tinitialize,\n\t\tconfigure,\n\t\tdestroy,\n\n\t\tsync,\n\t\tsyncSlide,\n\t\tsyncFragments: fragments.sync.bind( fragments ),\n\n\t\t// Navigation methods\n\t\tslide,\n\t\tleft: navigateLeft,\n\t\tright: navigateRight,\n\t\tup: navigateUp,\n\t\tdown: navigateDown,\n\t\tprev: navigatePrev,\n\t\tnext: navigateNext,\n\n\t\t// Navigation aliases\n\t\tnavigateLeft, navigateRight, navigateUp, navigateDown, navigatePrev, navigateNext,\n\n\t\t// Fragment methods\n\t\tnavigateFragment: fragments.goto.bind( fragments ),\n\t\tprevFragment: fragments.prev.bind( fragments ),\n\t\tnextFragment: fragments.next.bind( fragments ),\n\n\t\t// Event binding\n\t\ton,\n\t\toff,\n\n\t\t// Legacy event binding methods left in for backwards compatibility\n\t\taddEventListener: on,\n\t\tremoveEventListener: off,\n\n\t\t// Forces an update in slide layout\n\t\tlayout,\n\n\t\t// Randomizes the order of slides\n\t\tshuffle,\n\n\t\t// Returns an object with the available routes as booleans (left/right/top/bottom)\n\t\tavailableRoutes,\n\n\t\t// Returns an object with the available fragments as booleans (prev/next)\n\t\tavailableFragments: fragments.availableRoutes.bind( fragments ),\n\n\t\t// Toggles a help overlay with keyboard shortcuts\n\t\ttoggleHelp,\n\n\t\t// Toggles the overview mode on/off\n\t\ttoggleOverview: overview.toggle.bind( overview ),\n\n\t\t// Toggles the scroll view on/off\n\t\ttoggleScrollView: scrollView.toggle.bind( scrollView ),\n\n\t\t// Toggles the \"black screen\" mode on/off\n\t\ttogglePause,\n\n\t\t// Toggles the auto slide mode on/off\n\t\ttoggleAutoSlide,\n\n\t\t// Toggles visibility of the jump-to-slide UI\n\t\ttoggleJumpToSlide,\n\n\t\t// Slide navigation checks\n\t\tisFirstSlide,\n\t\tisLastSlide,\n\t\tisLastVerticalSlide,\n\t\tisVerticalSlide,\n\t\tisVerticalStack,\n\n\t\t// State checks\n\t\tisPaused,\n\t\tisAutoSliding,\n\t\tisSpeakerNotes: notes.isSpeakerNotesWindow.bind( notes ),\n\t\tisOverview: overview.isActive.bind( overview ),\n\t\tisFocused: focus.isFocused.bind( focus ),\n\n\t\tisScrollView: scrollView.isActive.bind( scrollView ),\n\t\tisPrintView: printView.isActive.bind( printView ),\n\n\t\t// Checks if reveal.js has been loaded and is ready for use\n\t\tisReady: () => ready,\n\n\t\t// Slide preloading\n\t\tloadSlide: slideContent.load.bind( slideContent ),\n\t\tunloadSlide: slideContent.unload.bind( slideContent ),\n\n\t\t// Start/stop all media inside of the current slide\n\t\tstartEmbeddedContent: () => slideContent.startEmbeddedContent( currentSlide ),\n\t\tstopEmbeddedContent: () => slideContent.stopEmbeddedContent( currentSlide, { unloadIframes: false } ),\n\n\t\t// Preview management\n\t\tshowPreview,\n\t\thidePreview: closeOverlay,\n\n\t\t// Adds or removes all internal event listeners\n\t\taddEventListeners,\n\t\tremoveEventListeners,\n\t\tdispatchEvent,\n\n\t\t// Facility for persisting and restoring the presentation state\n\t\tgetState,\n\t\tsetState,\n\n\t\t// Presentation progress on range of 0-1\n\t\tgetProgress,\n\n\t\t// Returns the indices of the current, or specified, slide\n\t\tgetIndices,\n\n\t\t// Returns an Array of key:value maps of the attributes of each\n\t\t// slide in the deck\n\t\tgetSlidesAttributes,\n\n\t\t// Returns the number of slides that we have passed\n\t\tgetSlidePastCount,\n\n\t\t// Returns the total number of slides\n\t\tgetTotalSlides,\n\n\t\t// Returns the slide element at the specified index\n\t\tgetSlide,\n\n\t\t// Returns the previous slide element, may be null\n\t\tgetPreviousSlide: () => previousSlide,\n\n\t\t// Returns the current slide element\n\t\tgetCurrentSlide: () => currentSlide,\n\n\t\t// Returns the slide background element at the specified index\n\t\tgetSlideBackground,\n\n\t\t// Returns the speaker notes string for a slide, or null\n\t\tgetSlideNotes: notes.getSlideNotes.bind( notes ),\n\n\t\t// Returns an Array of all slides\n\t\tgetSlides,\n\n\t\t// Returns an array with all horizontal/vertical slides in the deck\n\t\tgetHorizontalSlides,\n\t\tgetVerticalSlides,\n\n\t\t// Checks if the presentation contains two or more horizontal\n\t\t// and vertical slides\n\t\thasHorizontalSlides,\n\t\thasVerticalSlides,\n\n\t\t// Checks if the deck has navigated on either axis at least once\n\t\thasNavigatedHorizontally: () => navigationHistory.hasNavigatedHorizontally,\n\t\thasNavigatedVertically: () => navigationHistory.hasNavigatedVertically,\n\n\t\tshouldAutoAnimateBetween,\n\n\t\t// Adds/removes a custom key binding\n\t\taddKeyBinding: keyboard.addKeyBinding.bind( keyboard ),\n\t\tremoveKeyBinding: keyboard.removeKeyBinding.bind( keyboard ),\n\n\t\t// Programmatically triggers a keyboard event\n\t\ttriggerKey: keyboard.triggerKey.bind( keyboard ),\n\n\t\t// Registers a new shortcut to include in the help overlay\n\t\tregisterKeyboardShortcut: keyboard.registerKeyboardShortcut.bind( keyboard ),\n\n\t\tgetComputedSlideSize,\n\t\tsetCurrentScrollPage,\n\n\t\t// Returns the current scale of the presentation content\n\t\tgetScale: () => scale,\n\n\t\t// Returns the current configuration object\n\t\tgetConfig: () => config,\n\n\t\t// Helper method, retrieves query string as a key:value map\n\t\tgetQueryHash: Util.getQueryHash,\n\n\t\t// Returns the path to the current slide as represented in the URL\n\t\tgetSlidePath: location.getHash.bind( location ),\n\n\t\t// Returns reveal.js DOM elements\n\t\tgetRevealElement: () => revealElement,\n\t\tgetSlidesElement: () => dom.slides,\n\t\tgetViewportElement: () => dom.viewport,\n\t\tgetBackgroundsElement: () => backgrounds.element,\n\n\t\t// API for registering and retrieving plugins\n\t\tregisterPlugin: plugins.registerPlugin.bind( plugins ),\n\t\thasPlugin: plugins.hasPlugin.bind( plugins ),\n\t\tgetPlugin: plugins.getPlugin.bind( plugins ),\n\t\tgetPlugins: plugins.getRegisteredPlugins.bind( plugins )\n\n\t};\n\n\t// Our internal API which controllers have access to\n\tUtil.extend( Reveal, {\n\t\t...API,\n\n\t\t// Methods for announcing content to screen readers\n\t\tannounceStatus,\n\t\tgetStatusText,\n\n\t\t// Controllers\n\t\tfocus,\n\t\tscroll: scrollView,\n\t\tprogress,\n\t\tcontrols,\n\t\tlocation,\n\t\toverview,\n\t\tfragments,\n\t\tbackgrounds,\n\t\tslideContent,\n\t\tslideNumber,\n\n\t\tonUserInput,\n\t\tcloseOverlay,\n\t\tupdateSlidesVisibility,\n\t\tlayoutSlideContents,\n\t\ttransformSlides,\n\t\tcueAutoSlide,\n\t\tcancelAutoSlide\n\t} );\n\n\treturn API;\n\n};\n","import Deck, { VERSION } from './reveal.js'\n\n/**\n * Expose the Reveal class to the window. To create a\n * new instance:\n * let deck = new Reveal( document.querySelector( '.reveal' ), {\n * controls: false\n * } );\n * deck.initialize().then(() => {\n * // reveal.js is ready\n * });\n */\nlet Reveal = Deck;\n\n\n/**\n * The below is a thin shell that mimics the pre 4.0\n * reveal.js API and ensures backwards compatibility.\n * This API only allows for one Reveal instance per\n * page, whereas the new API above lets you run many\n * presentations on the same page.\n *\n * Reveal.initialize( { controls: false } ).then(() => {\n * // reveal.js is ready\n * });\n */\n\nlet enqueuedAPICalls = [];\n\nReveal.initialize = options => {\n\n\t// Create our singleton reveal.js instance\n\tObject.assign( Reveal, new Deck( document.querySelector( '.reveal' ), options ) );\n\n\t// Invoke any enqueued API calls\n\tenqueuedAPICalls.map( method => method( Reveal ) );\n\n\treturn Reveal.initialize();\n\n}\n\n/**\n * The pre 4.0 API let you add event listener before\n * initializing. 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+\ No newline at end of file
diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/league-gothic/LICENSE b/_freeze/site_libs/revealjs/dist/theme/fonts/league-gothic/LICENSE
@@ -0,0 +1,2 @@
+SIL Open Font License (OFL)
+http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL
diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/league-gothic/league-gothic.css b/_freeze/site_libs/revealjs/dist/theme/fonts/league-gothic/league-gothic.css
@@ -0,0 +1,10 @@
+@font-face {
+ font-family: 'League Gothic';
+ src: url('./league-gothic.eot');
+ src: url('./league-gothic.eot?#iefix') format('embedded-opentype'),
+ url('./league-gothic.woff') format('woff'),
+ url('./league-gothic.ttf') format('truetype');
+
+ font-weight: normal;
+ font-style: normal;
+}
diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/league-gothic/league-gothic.eot b/_freeze/site_libs/revealjs/dist/theme/fonts/league-gothic/league-gothic.eot
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/league-gothic/league-gothic.ttf b/_freeze/site_libs/revealjs/dist/theme/fonts/league-gothic/league-gothic.ttf
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/league-gothic/league-gothic.woff b/_freeze/site_libs/revealjs/dist/theme/fonts/league-gothic/league-gothic.woff
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/LICENSE b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/LICENSE
@@ -0,0 +1,45 @@
+SIL Open Font License
+
+Copyright 2010, 2012 Adobe Systems Incorporated (http://www.adobe.com/), with Reserved Font Name ‘Source’. All Rights Reserved. Source is a trademark of Adobe Systems Incorporated in the United States and/or other countries.
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL
+
+—————————————————————————————-
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+—————————————————————————————-
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide development of collaborative font projects, to support the font creation efforts of academic and linguistic communities, and to provide a free and open framework in which fonts may be shared and improved in partnership with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and redistributed freely as long as they are not sold by themselves. The fonts, including any derivative works, can be bundled, embedded, redistributed and/or sold with any software provided that any reserved names are not used by derivative works. The fonts and derivatives, however, cannot be released under any other type of license. The requirement for fonts to remain under this license does not apply to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+“Font Software” refers to the set of files released by the Copyright Holder(s) under this license and clearly marked as such. This may include source files, build scripts and documentation.
+
+“Reserved Font Name” refers to any names specified as such after the copyright statement(s).
+
+“Original Version” refers to the collection of Font Software components as distributed by the Copyright Holder(s).
+
+“Modified Version” refers to any derivative made by adding to, deleting, or substituting—in part or in whole—any of the components of the Original Version, by changing formats or by porting the Font Software to a new environment.
+
+“Author” refers to any designer, engineer, programmer, technical writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining a copy of the Font Software, to use, study, copy, merge, embed, modify, redistribute, and sell modified and unmodified copies of the Font Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components, in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled, redistributed and/or sold with any software, provided that each copy contains the above copyright notice and this license. These can be included either as stand-alone text files, human-readable headers or in the appropriate machine-readable metadata fields within text or binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font Name(s) unless explicit written permission is granted by the corresponding Copyright Holder. This restriction only applies to the primary font name as presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font Software shall not be used to promote, endorse or advertise any Modified Version, except to acknowledge the contribution(s) of the Copyright Holder(s) and the Author(s) or with their explicit written permission.
+
+5) The Font Software, modified or unmodified, in part or in whole, must be distributed entirely under this license, and must not be distributed under any other license. The requirement for fonts to remain under this license does not apply to any document created using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER DEALINGS IN THE FONT SOFTWARE.
+\ No newline at end of file
diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-italic.eot b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-italic.eot
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-italic.ttf b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-italic.ttf
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-italic.woff b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-italic.woff
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-regular.eot b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-regular.eot
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-regular.ttf b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-regular.ttf
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-regular.woff b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-regular.woff
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibold.eot b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibold.eot
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibold.ttf b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibold.ttf
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibold.woff b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibold.woff
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibolditalic.eot b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibolditalic.eot
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibolditalic.ttf b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibolditalic.ttf
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibolditalic.woff b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro-semibolditalic.woff
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diff --git a/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro.css b/_freeze/site_libs/revealjs/dist/theme/fonts/source-sans-pro/source-sans-pro.css
@@ -0,0 +1,39 @@
+@font-face {
+ font-family: 'Source Sans Pro';
+ src: url('./source-sans-pro-regular.eot');
+ src: url('./source-sans-pro-regular.eot?#iefix') format('embedded-opentype'),
+ url('./source-sans-pro-regular.woff') format('woff'),
+ url('./source-sans-pro-regular.ttf') format('truetype');
+ font-weight: normal;
+ font-style: normal;
+}
+
+@font-face {
+ font-family: 'Source Sans Pro';
+ src: url('./source-sans-pro-italic.eot');
+ src: url('./source-sans-pro-italic.eot?#iefix') format('embedded-opentype'),
+ url('./source-sans-pro-italic.woff') format('woff'),
+ url('./source-sans-pro-italic.ttf') format('truetype');
+ font-weight: normal;
+ font-style: italic;
+}
+
+@font-face {
+ font-family: 'Source Sans Pro';
+ src: url('./source-sans-pro-semibold.eot');
+ src: url('./source-sans-pro-semibold.eot?#iefix') format('embedded-opentype'),
+ url('./source-sans-pro-semibold.woff') format('woff'),
+ url('./source-sans-pro-semibold.ttf') format('truetype');
+ font-weight: 600;
+ font-style: normal;
+}
+
+@font-face {
+ font-family: 'Source Sans Pro';
+ src: url('./source-sans-pro-semibolditalic.eot');
+ src: url('./source-sans-pro-semibolditalic.eot?#iefix') format('embedded-opentype'),
+ url('./source-sans-pro-semibolditalic.woff') format('woff'),
+ url('./source-sans-pro-semibolditalic.ttf') format('truetype');
+ font-weight: 600;
+ font-style: italic;
+}
diff --git a/_freeze/site_libs/revealjs/dist/theme/quarto-5fa723a4ee799f64e44b6fe0747a0a63.css b/_freeze/site_libs/revealjs/dist/theme/quarto-5fa723a4ee799f64e44b6fe0747a0a63.css
@@ -0,0 +1,8 @@
+@import"./fonts/source-sans-pro/source-sans-pro.css";:root{--r-background-color: #191919;--r-main-font: Source Sans Pro, Helvetica, sans-serif;--r-main-font-size: 36px;--r-main-color: #fff;--r-block-margin: 12px;--r-heading-margin: 0 0 12px 0;--r-heading-font: Source Sans Pro, Helvetica, sans-serif;--r-heading-color: #fff;--r-heading-line-height: 1.2;--r-heading-letter-spacing: normal;--r-heading-text-transform: none;--r-heading-text-shadow: none;--r-heading-font-weight: 600;--r-heading1-text-shadow: none;--r-heading1-size: 2em;--r-heading2-size: 1.6em;--r-heading3-size: 1.3em;--r-heading4-size: 1em;--r-code-font: SFMono-Regular, Menlo, Monaco, Consolas, Liberation Mono, Courier New, monospace;--r-link-color: #42affa;--r-link-color-dark: rgb(6.1726804124, 140.7371134021, 233.3273195876);--r-link-color-hover: rgb(115.6855670103, 196.0309278351, 251.3144329897);--r-selection-background-color: rgb(190.2139175258, 227.5773195876, 253.2860824742);--r-selection-color: #191919;--r-overlay-element-bg-color: 240, 240, 240;--r-overlay-element-fg-color: 0, 0, 0}.reveal-viewport{background:#191919;background-color:var(--r-background-color)}.reveal{font-family:var(--r-main-font);font-size:var(--r-main-font-size);font-weight:normal;color:var(--r-main-color)}.reveal ::selection{color:var(--r-selection-color);background:var(--r-selection-background-color);text-shadow:none}.reveal ::-moz-selection{color:var(--r-selection-color);background:var(--r-selection-background-color);text-shadow:none}.reveal .slides section,.reveal .slides section>section{line-height:1.3;font-weight:inherit}.reveal h1,.reveal h2,.reveal h3,.reveal h4,.reveal h5,.reveal 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code{display:block;padding:5px;overflow:auto;max-height:400px;word-wrap:normal}.reveal .code-wrapper{white-space:normal}.reveal .code-wrapper code{white-space:pre}.reveal table{margin:auto;border-collapse:collapse;border-spacing:0}.reveal table th{font-weight:bold}.reveal table th,.reveal table td{text-align:left;padding:.2em .5em .2em .5em;border-bottom:1px solid}.reveal table th[align=center],.reveal table td[align=center]{text-align:center}.reveal table th[align=right],.reveal table td[align=right]{text-align:right}.reveal table tbody tr:last-child th,.reveal table tbody tr:last-child td{border-bottom:none}.reveal sup{vertical-align:super;font-size:smaller}.reveal sub{vertical-align:sub;font-size:smaller}.reveal small{display:inline-block;font-size:.6em;line-height:1.2em;vertical-align:top}.reveal small *{vertical-align:top}.reveal img{margin:var(--r-block-margin) 0}.reveal a{color:var(--r-link-color);text-decoration:none;transition:color .15s ease}.reveal 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.widget-subarea{margin-bottom:1em}.cell-output-display:not(.no-overflow-x),.knitsql-table:not(.no-overflow-x){overflow-x:auto}.panel-input{margin-bottom:1em}.panel-input>div,.panel-input>div>div{display:inline-block;vertical-align:top;padding-right:12px}.panel-input>p:last-child{margin-bottom:0}.layout-sidebar{margin-bottom:1em}.layout-sidebar .tab-content{border:none}.tab-content>.page-columns.active{display:grid}div.sourceCode>iframe{width:100%;height:300px;margin-bottom:-0.5em}a{text-underline-offset:3px}.callout pre.sourceCode{padding-left:0}div.ansi-escaped-output{font-family:monospace;display:block}/*!
+*
+* ansi colors from IPython notebook's
+*
+* we also add `bright-[color]-` synonyms for the `-[color]-intense` classes since
+* that seems to be what ansi_up emits
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t="[A-Za-zА-Яа-яёЁ_!][A-Za-zА-Яа-яёЁ_0-9]*",a={className:"number",begin:e.NUMBER_RE,relevance:0},n={className:"string",variants:[{begin:'"',end:'"'},{begin:"'",end:"'"}]},i={className:"doctag",begin:"\\b(?:TODO|DONE|BEGIN|END|STUB|CHG|FIXME|NOTE|BUG|XXX)\\b",relevance:0},r={variants:[{className:"comment",begin:"//",end:"$",relevance:0,contains:[e.PHRASAL_WORDS_MODE,i]},{className:"comment",begin:"/\\*",end:"\\*/",relevance:0,contains:[e.PHRASAL_WORDS_MODE,i]}]},o={$pattern:t,keyword:"and и else иначе endexcept endfinally endforeach конецвсе endif конецесли endwhile конецпока except exitfor finally foreach все if если in в not не or или try while пока ",built_in:"SYSRES_CONST_ACCES_RIGHT_TYPE_EDIT SYSRES_CONST_ACCES_RIGHT_TYPE_FULL SYSRES_CONST_ACCES_RIGHT_TYPE_VIEW SYSRES_CONST_ACCESS_MODE_REQUISITE_CODE SYSRES_CONST_ACCESS_NO_ACCESS_VIEW SYSRES_CONST_ACCESS_NO_ACCESS_VIEW_CODE SYSRES_CONST_ACCESS_RIGHTS_ADD_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_ADD_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_RIGHTS_CHANGE_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_CHANGE_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_RIGHTS_DELETE_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_DELETE_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_RIGHTS_EXECUTE_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_EXECUTE_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_RIGHTS_NO_ACCESS_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_NO_ACCESS_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_RIGHTS_RATIFY_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_RATIFY_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_RIGHTS_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_VIEW SYSRES_CONST_ACCESS_RIGHTS_VIEW_CODE SYSRES_CONST_ACCESS_RIGHTS_VIEW_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_VIEW_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_TYPE_CHANGE SYSRES_CONST_ACCESS_TYPE_CHANGE_CODE SYSRES_CONST_ACCESS_TYPE_EXISTS SYSRES_CONST_ACCESS_TYPE_EXISTS_CODE SYSRES_CONST_ACCESS_TYPE_FULL SYSRES_CONST_ACCESS_TYPE_FULL_CODE SYSRES_CONST_ACCESS_TYPE_VIEW SYSRES_CONST_ACCESS_TYPE_VIEW_CODE SYSRES_CONST_ACTION_TYPE_ABORT SYSRES_CONST_ACTION_TYPE_ACCEPT SYSRES_CONST_ACTION_TYPE_ACCESS_RIGHTS SYSRES_CONST_ACTION_TYPE_ADD_ATTACHMENT SYSRES_CONST_ACTION_TYPE_CHANGE_CARD SYSRES_CONST_ACTION_TYPE_CHANGE_KIND SYSRES_CONST_ACTION_TYPE_CHANGE_STORAGE SYSRES_CONST_ACTION_TYPE_CONTINUE SYSRES_CONST_ACTION_TYPE_COPY SYSRES_CONST_ACTION_TYPE_CREATE SYSRES_CONST_ACTION_TYPE_CREATE_VERSION SYSRES_CONST_ACTION_TYPE_DELETE SYSRES_CONST_ACTION_TYPE_DELETE_ATTACHMENT SYSRES_CONST_ACTION_TYPE_DELETE_VERSION SYSRES_CONST_ACTION_TYPE_DISABLE_DELEGATE_ACCESS_RIGHTS SYSRES_CONST_ACTION_TYPE_ENABLE_DELEGATE_ACCESS_RIGHTS SYSRES_CONST_ACTION_TYPE_ENCRYPTION_BY_CERTIFICATE SYSRES_CONST_ACTION_TYPE_ENCRYPTION_BY_CERTIFICATE_AND_PASSWORD SYSRES_CONST_ACTION_TYPE_ENCRYPTION_BY_PASSWORD SYSRES_CONST_ACTION_TYPE_EXPORT_WITH_LOCK SYSRES_CONST_ACTION_TYPE_EXPORT_WITHOUT_LOCK SYSRES_CONST_ACTION_TYPE_IMPORT_WITH_UNLOCK SYSRES_CONST_ACTION_TYPE_IMPORT_WITHOUT_UNLOCK SYSRES_CONST_ACTION_TYPE_LIFE_CYCLE_STAGE SYSRES_CONST_ACTION_TYPE_LOCK SYSRES_CONST_ACTION_TYPE_LOCK_FOR_SERVER SYSRES_CONST_ACTION_TYPE_LOCK_MODIFY SYSRES_CONST_ACTION_TYPE_MARK_AS_READED SYSRES_CONST_ACTION_TYPE_MARK_AS_UNREADED SYSRES_CONST_ACTION_TYPE_MODIFY SYSRES_CONST_ACTION_TYPE_MODIFY_CARD SYSRES_CONST_ACTION_TYPE_MOVE_TO_ARCHIVE SYSRES_CONST_ACTION_TYPE_OFF_ENCRYPTION SYSRES_CONST_ACTION_TYPE_PASSWORD_CHANGE SYSRES_CONST_ACTION_TYPE_PERFORM SYSRES_CONST_ACTION_TYPE_RECOVER_FROM_LOCAL_COPY SYSRES_CONST_ACTION_TYPE_RESTART SYSRES_CONST_ACTION_TYPE_RESTORE_FROM_ARCHIVE SYSRES_CONST_ACTION_TYPE_REVISION SYSRES_CONST_ACTION_TYPE_SEND_BY_MAIL SYSRES_CONST_ACTION_TYPE_SIGN SYSRES_CONST_ACTION_TYPE_START SYSRES_CONST_ACTION_TYPE_UNLOCK SYSRES_CONST_ACTION_TYPE_UNLOCK_FROM_SERVER SYSRES_CONST_ACTION_TYPE_VERSION_STATE SYSRES_CONST_ACTION_TYPE_VERSION_VISIBILITY SYSRES_CONST_ACTION_TYPE_VIEW SYSRES_CONST_ACTION_TYPE_VIEW_SHADOW_COPY SYSRES_CONST_ACTION_TYPE_WORKFLOW_DESCRIPTION_MODIFY SYSRES_CONST_ACTION_TYPE_WRITE_HISTORY SYSRES_CONST_ACTIVE_VERSION_STATE_PICK_VALUE SYSRES_CONST_ADD_REFERENCE_MODE_NAME SYSRES_CONST_ADDITION_REQUISITE_CODE SYSRES_CONST_ADDITIONAL_PARAMS_REQUISITE_CODE SYSRES_CONST_ADITIONAL_JOB_END_DATE_REQUISITE_NAME SYSRES_CONST_ADITIONAL_JOB_READ_REQUISITE_NAME SYSRES_CONST_ADITIONAL_JOB_START_DATE_REQUISITE_NAME SYSRES_CONST_ADITIONAL_JOB_STATE_REQUISITE_NAME SYSRES_CONST_ADMINISTRATION_HISTORY_ADDING_USER_TO_GROUP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_ADDING_USER_TO_GROUP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_CREATION_COMP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_CREATION_COMP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_CREATION_GROUP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_CREATION_GROUP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_CREATION_USER_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_CREATION_USER_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_DATABASE_USER_CREATION SYSRES_CONST_ADMINISTRATION_HISTORY_DATABASE_USER_CREATION_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_DATABASE_USER_DELETION SYSRES_CONST_ADMINISTRATION_HISTORY_DATABASE_USER_DELETION_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_COMP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_COMP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_GROUP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_GROUP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_USER_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_USER_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_USER_FROM_GROUP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_USER_FROM_GROUP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_FILTERER_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_FILTERER_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_FILTERER_RESTRICTION_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_FILTERER_RESTRICTION_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_PRIVILEGE_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_PRIVILEGE_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_RIGHTS_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_RIGHTS_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_IS_MAIN_SERVER_CHANGED_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_IS_MAIN_SERVER_CHANGED_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_IS_PUBLIC_CHANGED_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_IS_PUBLIC_CHANGED_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_FILTERER_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_FILTERER_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_FILTERER_RESTRICTION_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_FILTERER_RESTRICTION_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_PRIVILEGE_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_PRIVILEGE_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_RIGHTS_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_RIGHTS_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_SERVER_LOGIN_CREATION SYSRES_CONST_ADMINISTRATION_HISTORY_SERVER_LOGIN_CREATION_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_SERVER_LOGIN_DELETION SYSRES_CONST_ADMINISTRATION_HISTORY_SERVER_LOGIN_DELETION_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_CATEGORY_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_CATEGORY_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_COMP_TITLE_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_COMP_TITLE_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_FULL_NAME_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_FULL_NAME_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_GROUP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_GROUP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_PARENT_GROUP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_PARENT_GROUP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_USER_AUTH_TYPE_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_USER_AUTH_TYPE_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_USER_LOGIN_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_USER_LOGIN_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_USER_STATUS_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_USER_STATUS_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_USER_PASSWORD_CHANGE SYSRES_CONST_ADMINISTRATION_HISTORY_USER_PASSWORD_CHANGE_ACTION SYSRES_CONST_ALL_ACCEPT_CONDITION_RUS SYSRES_CONST_ALL_USERS_GROUP SYSRES_CONST_ALL_USERS_GROUP_NAME SYSRES_CONST_ALL_USERS_SERVER_GROUP_NAME SYSRES_CONST_ALLOWED_ACCESS_TYPE_CODE SYSRES_CONST_ALLOWED_ACCESS_TYPE_NAME SYSRES_CONST_APP_VIEWER_TYPE_REQUISITE_CODE SYSRES_CONST_APPROVING_SIGNATURE_NAME SYSRES_CONST_APPROVING_SIGNATURE_REQUISITE_CODE SYSRES_CONST_ASSISTANT_SUBSTITUE_TYPE SYSRES_CONST_ASSISTANT_SUBSTITUE_TYPE_CODE SYSRES_CONST_ATTACH_TYPE_COMPONENT_TOKEN SYSRES_CONST_ATTACH_TYPE_DOC SYSRES_CONST_ATTACH_TYPE_EDOC SYSRES_CONST_ATTACH_TYPE_FOLDER SYSRES_CONST_ATTACH_TYPE_JOB SYSRES_CONST_ATTACH_TYPE_REFERENCE SYSRES_CONST_ATTACH_TYPE_TASK SYSRES_CONST_AUTH_ENCODED_PASSWORD SYSRES_CONST_AUTH_ENCODED_PASSWORD_CODE SYSRES_CONST_AUTH_NOVELL SYSRES_CONST_AUTH_PASSWORD SYSRES_CONST_AUTH_PASSWORD_CODE SYSRES_CONST_AUTH_WINDOWS SYSRES_CONST_AUTHENTICATING_SIGNATURE_NAME SYSRES_CONST_AUTHENTICATING_SIGNATURE_REQUISITE_CODE SYSRES_CONST_AUTO_ENUM_METHOD_FLAG SYSRES_CONST_AUTO_NUMERATION_CODE SYSRES_CONST_AUTO_STRONG_ENUM_METHOD_FLAG SYSRES_CONST_AUTOTEXT_NAME_REQUISITE_CODE SYSRES_CONST_AUTOTEXT_TEXT_REQUISITE_CODE SYSRES_CONST_AUTOTEXT_USAGE_ALL SYSRES_CONST_AUTOTEXT_USAGE_ALL_CODE SYSRES_CONST_AUTOTEXT_USAGE_SIGN SYSRES_CONST_AUTOTEXT_USAGE_SIGN_CODE SYSRES_CONST_AUTOTEXT_USAGE_WORK SYSRES_CONST_AUTOTEXT_USAGE_WORK_CODE SYSRES_CONST_AUTOTEXT_USE_ANYWHERE_CODE SYSRES_CONST_AUTOTEXT_USE_ON_SIGNING_CODE SYSRES_CONST_AUTOTEXT_USE_ON_WORK_CODE SYSRES_CONST_BEGIN_DATE_REQUISITE_CODE SYSRES_CONST_BLACK_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_BLUE_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_BTN_PART SYSRES_CONST_CALCULATED_ROLE_TYPE_CODE SYSRES_CONST_CALL_TYPE_VARIABLE_BUTTON_VALUE SYSRES_CONST_CALL_TYPE_VARIABLE_PROGRAM_VALUE SYSRES_CONST_CANCEL_MESSAGE_FUNCTION_RESULT SYSRES_CONST_CARD_PART SYSRES_CONST_CARD_REFERENCE_MODE_NAME SYSRES_CONST_CERTIFICATE_TYPE_REQUISITE_ENCRYPT_VALUE SYSRES_CONST_CERTIFICATE_TYPE_REQUISITE_SIGN_AND_ENCRYPT_VALUE SYSRES_CONST_CERTIFICATE_TYPE_REQUISITE_SIGN_VALUE SYSRES_CONST_CHECK_PARAM_VALUE_DATE_PARAM_TYPE SYSRES_CONST_CHECK_PARAM_VALUE_FLOAT_PARAM_TYPE SYSRES_CONST_CHECK_PARAM_VALUE_INTEGER_PARAM_TYPE SYSRES_CONST_CHECK_PARAM_VALUE_PICK_PARAM_TYPE SYSRES_CONST_CHECK_PARAM_VALUE_REEFRENCE_PARAM_TYPE SYSRES_CONST_CLOSED_RECORD_FLAG_VALUE_FEMININE SYSRES_CONST_CLOSED_RECORD_FLAG_VALUE_MASCULINE SYSRES_CONST_CODE_COMPONENT_TYPE_ADMIN SYSRES_CONST_CODE_COMPONENT_TYPE_DEVELOPER SYSRES_CONST_CODE_COMPONENT_TYPE_DOCS SYSRES_CONST_CODE_COMPONENT_TYPE_EDOC_CARDS SYSRES_CONST_CODE_COMPONENT_TYPE_EXTERNAL_EXECUTABLE SYSRES_CONST_CODE_COMPONENT_TYPE_OTHER SYSRES_CONST_CODE_COMPONENT_TYPE_REFERENCE SYSRES_CONST_CODE_COMPONENT_TYPE_REPORT SYSRES_CONST_CODE_COMPONENT_TYPE_SCRIPT SYSRES_CONST_CODE_COMPONENT_TYPE_URL SYSRES_CONST_CODE_REQUISITE_ACCESS SYSRES_CONST_CODE_REQUISITE_CODE SYSRES_CONST_CODE_REQUISITE_COMPONENT SYSRES_CONST_CODE_REQUISITE_DESCRIPTION SYSRES_CONST_CODE_REQUISITE_EXCLUDE_COMPONENT SYSRES_CONST_CODE_REQUISITE_RECORD SYSRES_CONST_COMMENT_REQ_CODE SYSRES_CONST_COMMON_SETTINGS_REQUISITE_CODE SYSRES_CONST_COMP_CODE_GRD SYSRES_CONST_COMPONENT_GROUP_TYPE_REQUISITE_CODE SYSRES_CONST_COMPONENT_TYPE_ADMIN_COMPONENTS SYSRES_CONST_COMPONENT_TYPE_DEVELOPER_COMPONENTS SYSRES_CONST_COMPONENT_TYPE_DOCS SYSRES_CONST_COMPONENT_TYPE_EDOC_CARDS SYSRES_CONST_COMPONENT_TYPE_EDOCS SYSRES_CONST_COMPONENT_TYPE_EXTERNAL_EXECUTABLE SYSRES_CONST_COMPONENT_TYPE_OTHER SYSRES_CONST_COMPONENT_TYPE_REFERENCE_TYPES SYSRES_CONST_COMPONENT_TYPE_REFERENCES SYSRES_CONST_COMPONENT_TYPE_REPORTS SYSRES_CONST_COMPONENT_TYPE_SCRIPTS SYSRES_CONST_COMPONENT_TYPE_URL SYSRES_CONST_COMPONENTS_REMOTE_SERVERS_VIEW_CODE SYSRES_CONST_CONDITION_BLOCK_DESCRIPTION SYSRES_CONST_CONST_FIRM_STATUS_COMMON SYSRES_CONST_CONST_FIRM_STATUS_INDIVIDUAL SYSRES_CONST_CONST_NEGATIVE_VALUE SYSRES_CONST_CONST_POSITIVE_VALUE SYSRES_CONST_CONST_SERVER_STATUS_DONT_REPLICATE SYSRES_CONST_CONST_SERVER_STATUS_REPLICATE SYSRES_CONST_CONTENTS_REQUISITE_CODE SYSRES_CONST_DATA_TYPE_BOOLEAN SYSRES_CONST_DATA_TYPE_DATE SYSRES_CONST_DATA_TYPE_FLOAT SYSRES_CONST_DATA_TYPE_INTEGER SYSRES_CONST_DATA_TYPE_PICK SYSRES_CONST_DATA_TYPE_REFERENCE SYSRES_CONST_DATA_TYPE_STRING SYSRES_CONST_DATA_TYPE_TEXT SYSRES_CONST_DATA_TYPE_VARIANT SYSRES_CONST_DATE_CLOSE_REQ_CODE SYSRES_CONST_DATE_FORMAT_DATE_ONLY_CHAR SYSRES_CONST_DATE_OPEN_REQ_CODE SYSRES_CONST_DATE_REQUISITE SYSRES_CONST_DATE_REQUISITE_CODE SYSRES_CONST_DATE_REQUISITE_NAME SYSRES_CONST_DATE_REQUISITE_TYPE SYSRES_CONST_DATE_TYPE_CHAR SYSRES_CONST_DATETIME_FORMAT_VALUE SYSRES_CONST_DEA_ACCESS_RIGHTS_ACTION_CODE SYSRES_CONST_DESCRIPTION_LOCALIZE_ID_REQUISITE_CODE SYSRES_CONST_DESCRIPTION_REQUISITE_CODE SYSRES_CONST_DET1_PART SYSRES_CONST_DET2_PART SYSRES_CONST_DET3_PART SYSRES_CONST_DET4_PART SYSRES_CONST_DET5_PART SYSRES_CONST_DET6_PART SYSRES_CONST_DETAIL_DATASET_KEY_REQUISITE_CODE SYSRES_CONST_DETAIL_PICK_REQUISITE_CODE SYSRES_CONST_DETAIL_REQ_CODE SYSRES_CONST_DO_NOT_USE_ACCESS_TYPE_CODE SYSRES_CONST_DO_NOT_USE_ACCESS_TYPE_NAME SYSRES_CONST_DO_NOT_USE_ON_VIEW_ACCESS_TYPE_CODE SYSRES_CONST_DO_NOT_USE_ON_VIEW_ACCESS_TYPE_NAME SYSRES_CONST_DOCUMENT_STORAGES_CODE SYSRES_CONST_DOCUMENT_TEMPLATES_TYPE_NAME SYSRES_CONST_DOUBLE_REQUISITE_CODE SYSRES_CONST_EDITOR_CLOSE_FILE_OBSERV_TYPE_CODE SYSRES_CONST_EDITOR_CLOSE_PROCESS_OBSERV_TYPE_CODE SYSRES_CONST_EDITOR_TYPE_REQUISITE_CODE SYSRES_CONST_EDITORS_APPLICATION_NAME_REQUISITE_CODE SYSRES_CONST_EDITORS_CREATE_SEVERAL_PROCESSES_REQUISITE_CODE SYSRES_CONST_EDITORS_EXTENSION_REQUISITE_CODE SYSRES_CONST_EDITORS_OBSERVER_BY_PROCESS_TYPE SYSRES_CONST_EDITORS_REFERENCE_CODE SYSRES_CONST_EDITORS_REPLACE_SPEC_CHARS_REQUISITE_CODE SYSRES_CONST_EDITORS_USE_PLUGINS_REQUISITE_CODE SYSRES_CONST_EDITORS_VIEW_DOCUMENT_OPENED_TO_EDIT_CODE SYSRES_CONST_EDOC_CARD_TYPE_REQUISITE_CODE SYSRES_CONST_EDOC_CARD_TYPES_LINK_REQUISITE_CODE SYSRES_CONST_EDOC_CERTIFICATE_AND_PASSWORD_ENCODE_CODE SYSRES_CONST_EDOC_CERTIFICATE_ENCODE_CODE SYSRES_CONST_EDOC_DATE_REQUISITE_CODE SYSRES_CONST_EDOC_KIND_REFERENCE_CODE SYSRES_CONST_EDOC_KINDS_BY_TEMPLATE_ACTION_CODE SYSRES_CONST_EDOC_MANAGE_ACCESS_CODE SYSRES_CONST_EDOC_NONE_ENCODE_CODE SYSRES_CONST_EDOC_NUMBER_REQUISITE_CODE SYSRES_CONST_EDOC_PASSWORD_ENCODE_CODE SYSRES_CONST_EDOC_READONLY_ACCESS_CODE SYSRES_CONST_EDOC_SHELL_LIFE_TYPE_VIEW_VALUE SYSRES_CONST_EDOC_SIZE_RESTRICTION_PRIORITY_REQUISITE_CODE SYSRES_CONST_EDOC_STORAGE_CHECK_ACCESS_RIGHTS_REQUISITE_CODE SYSRES_CONST_EDOC_STORAGE_COMPUTER_NAME_REQUISITE_CODE SYSRES_CONST_EDOC_STORAGE_DATABASE_NAME_REQUISITE_CODE SYSRES_CONST_EDOC_STORAGE_EDIT_IN_STORAGE_REQUISITE_CODE SYSRES_CONST_EDOC_STORAGE_LOCAL_PATH_REQUISITE_CODE SYSRES_CONST_EDOC_STORAGE_SHARED_SOURCE_NAME_REQUISITE_CODE SYSRES_CONST_EDOC_TEMPLATE_REQUISITE_CODE SYSRES_CONST_EDOC_TYPES_REFERENCE_CODE SYSRES_CONST_EDOC_VERSION_ACTIVE_STAGE_CODE SYSRES_CONST_EDOC_VERSION_DESIGN_STAGE_CODE SYSRES_CONST_EDOC_VERSION_OBSOLETE_STAGE_CODE SYSRES_CONST_EDOC_WRITE_ACCES_CODE SYSRES_CONST_EDOCUMENT_CARD_REQUISITES_REFERENCE_CODE_SELECTED_REQUISITE SYSRES_CONST_ENCODE_CERTIFICATE_TYPE_CODE SYSRES_CONST_END_DATE_REQUISITE_CODE SYSRES_CONST_ENUMERATION_TYPE_REQUISITE_CODE SYSRES_CONST_EXECUTE_ACCESS_RIGHTS_TYPE_CODE SYSRES_CONST_EXECUTIVE_FILE_STORAGE_TYPE SYSRES_CONST_EXIST_CONST SYSRES_CONST_EXIST_VALUE SYSRES_CONST_EXPORT_LOCK_TYPE_ASK SYSRES_CONST_EXPORT_LOCK_TYPE_WITH_LOCK SYSRES_CONST_EXPORT_LOCK_TYPE_WITHOUT_LOCK SYSRES_CONST_EXPORT_VERSION_TYPE_ASK SYSRES_CONST_EXPORT_VERSION_TYPE_LAST SYSRES_CONST_EXPORT_VERSION_TYPE_LAST_ACTIVE SYSRES_CONST_EXTENSION_REQUISITE_CODE SYSRES_CONST_FILTER_NAME_REQUISITE_CODE SYSRES_CONST_FILTER_REQUISITE_CODE SYSRES_CONST_FILTER_TYPE_COMMON_CODE SYSRES_CONST_FILTER_TYPE_COMMON_NAME SYSRES_CONST_FILTER_TYPE_USER_CODE SYSRES_CONST_FILTER_TYPE_USER_NAME SYSRES_CONST_FILTER_VALUE_REQUISITE_NAME SYSRES_CONST_FLOAT_NUMBER_FORMAT_CHAR SYSRES_CONST_FLOAT_REQUISITE_TYPE SYSRES_CONST_FOLDER_AUTHOR_VALUE SYSRES_CONST_FOLDER_KIND_ANY_OBJECTS SYSRES_CONST_FOLDER_KIND_COMPONENTS SYSRES_CONST_FOLDER_KIND_EDOCS SYSRES_CONST_FOLDER_KIND_JOBS SYSRES_CONST_FOLDER_KIND_TASKS SYSRES_CONST_FOLDER_TYPE_COMMON SYSRES_CONST_FOLDER_TYPE_COMPONENT SYSRES_CONST_FOLDER_TYPE_FAVORITES SYSRES_CONST_FOLDER_TYPE_INBOX SYSRES_CONST_FOLDER_TYPE_OUTBOX SYSRES_CONST_FOLDER_TYPE_QUICK_LAUNCH SYSRES_CONST_FOLDER_TYPE_SEARCH SYSRES_CONST_FOLDER_TYPE_SHORTCUTS SYSRES_CONST_FOLDER_TYPE_USER SYSRES_CONST_FROM_DICTIONARY_ENUM_METHOD_FLAG SYSRES_CONST_FULL_SUBSTITUTE_TYPE SYSRES_CONST_FULL_SUBSTITUTE_TYPE_CODE SYSRES_CONST_FUNCTION_CANCEL_RESULT SYSRES_CONST_FUNCTION_CATEGORY_SYSTEM SYSRES_CONST_FUNCTION_CATEGORY_USER SYSRES_CONST_FUNCTION_FAILURE_RESULT SYSRES_CONST_FUNCTION_SAVE_RESULT SYSRES_CONST_GENERATED_REQUISITE SYSRES_CONST_GREEN_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_GROUP_ACCOUNT_TYPE_VALUE_CODE SYSRES_CONST_GROUP_CATEGORY_NORMAL_CODE SYSRES_CONST_GROUP_CATEGORY_NORMAL_NAME SYSRES_CONST_GROUP_CATEGORY_SERVICE_CODE SYSRES_CONST_GROUP_CATEGORY_SERVICE_NAME SYSRES_CONST_GROUP_COMMON_CATEGORY_FIELD_VALUE SYSRES_CONST_GROUP_FULL_NAME_REQUISITE_CODE SYSRES_CONST_GROUP_NAME_REQUISITE_CODE SYSRES_CONST_GROUP_RIGHTS_T_REQUISITE_CODE SYSRES_CONST_GROUP_SERVER_CODES_REQUISITE_CODE SYSRES_CONST_GROUP_SERVER_NAME_REQUISITE_CODE SYSRES_CONST_GROUP_SERVICE_CATEGORY_FIELD_VALUE SYSRES_CONST_GROUP_USER_REQUISITE_CODE SYSRES_CONST_GROUPS_REFERENCE_CODE SYSRES_CONST_GROUPS_REQUISITE_CODE SYSRES_CONST_HIDDEN_MODE_NAME SYSRES_CONST_HIGH_LVL_REQUISITE_CODE SYSRES_CONST_HISTORY_ACTION_CREATE_CODE SYSRES_CONST_HISTORY_ACTION_DELETE_CODE SYSRES_CONST_HISTORY_ACTION_EDIT_CODE SYSRES_CONST_HOUR_CHAR SYSRES_CONST_ID_REQUISITE_CODE SYSRES_CONST_IDSPS_REQUISITE_CODE SYSRES_CONST_IMAGE_MODE_COLOR SYSRES_CONST_IMAGE_MODE_GREYSCALE SYSRES_CONST_IMAGE_MODE_MONOCHROME SYSRES_CONST_IMPORTANCE_HIGH SYSRES_CONST_IMPORTANCE_LOW SYSRES_CONST_IMPORTANCE_NORMAL SYSRES_CONST_IN_DESIGN_VERSION_STATE_PICK_VALUE SYSRES_CONST_INCOMING_WORK_RULE_TYPE_CODE SYSRES_CONST_INT_REQUISITE SYSRES_CONST_INT_REQUISITE_TYPE SYSRES_CONST_INTEGER_NUMBER_FORMAT_CHAR SYSRES_CONST_INTEGER_TYPE_CHAR SYSRES_CONST_IS_GENERATED_REQUISITE_NEGATIVE_VALUE SYSRES_CONST_IS_PUBLIC_ROLE_REQUISITE_CODE SYSRES_CONST_IS_REMOTE_USER_NEGATIVE_VALUE SYSRES_CONST_IS_REMOTE_USER_POSITIVE_VALUE SYSRES_CONST_IS_STORED_REQUISITE_NEGATIVE_VALUE SYSRES_CONST_IS_STORED_REQUISITE_STORED_VALUE SYSRES_CONST_ITALIC_LIFE_CYCLE_STAGE_DRAW_STYLE SYSRES_CONST_JOB_BLOCK_DESCRIPTION SYSRES_CONST_JOB_KIND_CONTROL_JOB SYSRES_CONST_JOB_KIND_JOB SYSRES_CONST_JOB_KIND_NOTICE SYSRES_CONST_JOB_STATE_ABORTED SYSRES_CONST_JOB_STATE_COMPLETE SYSRES_CONST_JOB_STATE_WORKING SYSRES_CONST_KIND_REQUISITE_CODE SYSRES_CONST_KIND_REQUISITE_NAME SYSRES_CONST_KINDS_CREATE_SHADOW_COPIES_REQUISITE_CODE SYSRES_CONST_KINDS_DEFAULT_EDOC_LIFE_STAGE_REQUISITE_CODE SYSRES_CONST_KINDS_EDOC_ALL_TEPLATES_ALLOWED_REQUISITE_CODE SYSRES_CONST_KINDS_EDOC_ALLOW_LIFE_CYCLE_STAGE_CHANGING_REQUISITE_CODE SYSRES_CONST_KINDS_EDOC_ALLOW_MULTIPLE_ACTIVE_VERSIONS_REQUISITE_CODE SYSRES_CONST_KINDS_EDOC_SHARE_ACCES_RIGHTS_BY_DEFAULT_CODE SYSRES_CONST_KINDS_EDOC_TEMPLATE_REQUISITE_CODE SYSRES_CONST_KINDS_EDOC_TYPE_REQUISITE_CODE SYSRES_CONST_KINDS_SIGNERS_REQUISITES_CODE SYSRES_CONST_KOD_INPUT_TYPE SYSRES_CONST_LAST_UPDATE_DATE_REQUISITE_CODE SYSRES_CONST_LIFE_CYCLE_START_STAGE_REQUISITE_CODE SYSRES_CONST_LILAC_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_LINK_OBJECT_KIND_COMPONENT SYSRES_CONST_LINK_OBJECT_KIND_DOCUMENT SYSRES_CONST_LINK_OBJECT_KIND_EDOC SYSRES_CONST_LINK_OBJECT_KIND_FOLDER SYSRES_CONST_LINK_OBJECT_KIND_JOB SYSRES_CONST_LINK_OBJECT_KIND_REFERENCE SYSRES_CONST_LINK_OBJECT_KIND_TASK SYSRES_CONST_LINK_REF_TYPE_REQUISITE_CODE SYSRES_CONST_LIST_REFERENCE_MODE_NAME SYSRES_CONST_LOCALIZATION_DICTIONARY_MAIN_VIEW_CODE SYSRES_CONST_MAIN_VIEW_CODE SYSRES_CONST_MANUAL_ENUM_METHOD_FLAG SYSRES_CONST_MASTER_COMP_TYPE_REQUISITE_CODE SYSRES_CONST_MASTER_TABLE_REC_ID_REQUISITE_CODE SYSRES_CONST_MAXIMIZED_MODE_NAME SYSRES_CONST_ME_VALUE SYSRES_CONST_MESSAGE_ATTENTION_CAPTION SYSRES_CONST_MESSAGE_CONFIRMATION_CAPTION SYSRES_CONST_MESSAGE_ERROR_CAPTION SYSRES_CONST_MESSAGE_INFORMATION_CAPTION SYSRES_CONST_MINIMIZED_MODE_NAME SYSRES_CONST_MINUTE_CHAR SYSRES_CONST_MODULE_REQUISITE_CODE SYSRES_CONST_MONITORING_BLOCK_DESCRIPTION SYSRES_CONST_MONTH_FORMAT_VALUE SYSRES_CONST_NAME_LOCALIZE_ID_REQUISITE_CODE SYSRES_CONST_NAME_REQUISITE_CODE SYSRES_CONST_NAME_SINGULAR_REQUISITE_CODE SYSRES_CONST_NAMEAN_INPUT_TYPE SYSRES_CONST_NEGATIVE_PICK_VALUE SYSRES_CONST_NEGATIVE_VALUE SYSRES_CONST_NO SYSRES_CONST_NO_PICK_VALUE SYSRES_CONST_NO_SIGNATURE_REQUISITE_CODE SYSRES_CONST_NO_VALUE SYSRES_CONST_NONE_ACCESS_RIGHTS_TYPE_CODE SYSRES_CONST_NONOPERATING_RECORD_FLAG_VALUE SYSRES_CONST_NONOPERATING_RECORD_FLAG_VALUE_MASCULINE SYSRES_CONST_NORMAL_ACCESS_RIGHTS_TYPE_CODE SYSRES_CONST_NORMAL_LIFE_CYCLE_STAGE_DRAW_STYLE SYSRES_CONST_NORMAL_MODE_NAME SYSRES_CONST_NOT_ALLOWED_ACCESS_TYPE_CODE SYSRES_CONST_NOT_ALLOWED_ACCESS_TYPE_NAME SYSRES_CONST_NOTE_REQUISITE_CODE SYSRES_CONST_NOTICE_BLOCK_DESCRIPTION SYSRES_CONST_NUM_REQUISITE SYSRES_CONST_NUM_STR_REQUISITE_CODE SYSRES_CONST_NUMERATION_AUTO_NOT_STRONG SYSRES_CONST_NUMERATION_AUTO_STRONG SYSRES_CONST_NUMERATION_FROM_DICTONARY SYSRES_CONST_NUMERATION_MANUAL SYSRES_CONST_NUMERIC_TYPE_CHAR SYSRES_CONST_NUMREQ_REQUISITE_CODE SYSRES_CONST_OBSOLETE_VERSION_STATE_PICK_VALUE SYSRES_CONST_OPERATING_RECORD_FLAG_VALUE SYSRES_CONST_OPERATING_RECORD_FLAG_VALUE_CODE SYSRES_CONST_OPERATING_RECORD_FLAG_VALUE_FEMININE SYSRES_CONST_OPERATING_RECORD_FLAG_VALUE_MASCULINE SYSRES_CONST_OPTIONAL_FORM_COMP_REQCODE_PREFIX SYSRES_CONST_ORANGE_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_ORIGINALREF_REQUISITE_CODE SYSRES_CONST_OURFIRM_REF_CODE SYSRES_CONST_OURFIRM_REQUISITE_CODE SYSRES_CONST_OURFIRM_VAR SYSRES_CONST_OUTGOING_WORK_RULE_TYPE_CODE SYSRES_CONST_PICK_NEGATIVE_RESULT SYSRES_CONST_PICK_POSITIVE_RESULT SYSRES_CONST_PICK_REQUISITE SYSRES_CONST_PICK_REQUISITE_TYPE SYSRES_CONST_PICK_TYPE_CHAR SYSRES_CONST_PLAN_STATUS_REQUISITE_CODE SYSRES_CONST_PLATFORM_VERSION_COMMENT SYSRES_CONST_PLUGINS_SETTINGS_DESCRIPTION_REQUISITE_CODE SYSRES_CONST_POSITIVE_PICK_VALUE SYSRES_CONST_POWER_TO_CREATE_ACTION_CODE SYSRES_CONST_POWER_TO_SIGN_ACTION_CODE SYSRES_CONST_PRIORITY_REQUISITE_CODE SYSRES_CONST_QUALIFIED_TASK_TYPE SYSRES_CONST_QUALIFIED_TASK_TYPE_CODE SYSRES_CONST_RECSTAT_REQUISITE_CODE SYSRES_CONST_RED_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_REF_ID_T_REF_TYPE_REQUISITE_CODE SYSRES_CONST_REF_REQUISITE SYSRES_CONST_REF_REQUISITE_TYPE SYSRES_CONST_REF_REQUISITES_REFERENCE_CODE_SELECTED_REQUISITE SYSRES_CONST_REFERENCE_RECORD_HISTORY_CREATE_ACTION_CODE SYSRES_CONST_REFERENCE_RECORD_HISTORY_DELETE_ACTION_CODE SYSRES_CONST_REFERENCE_RECORD_HISTORY_MODIFY_ACTION_CODE SYSRES_CONST_REFERENCE_TYPE_CHAR SYSRES_CONST_REFERENCE_TYPE_REQUISITE_NAME SYSRES_CONST_REFERENCES_ADD_PARAMS_REQUISITE_CODE SYSRES_CONST_REFERENCES_DISPLAY_REQUISITE_REQUISITE_CODE SYSRES_CONST_REMOTE_SERVER_STATUS_WORKING SYSRES_CONST_REMOTE_SERVER_TYPE_MAIN SYSRES_CONST_REMOTE_SERVER_TYPE_SECONDARY SYSRES_CONST_REMOTE_USER_FLAG_VALUE_CODE SYSRES_CONST_REPORT_APP_EDITOR_INTERNAL SYSRES_CONST_REPORT_BASE_REPORT_ID_REQUISITE_CODE SYSRES_CONST_REPORT_BASE_REPORT_REQUISITE_CODE SYSRES_CONST_REPORT_SCRIPT_REQUISITE_CODE SYSRES_CONST_REPORT_TEMPLATE_REQUISITE_CODE SYSRES_CONST_REPORT_VIEWER_CODE_REQUISITE_CODE SYSRES_CONST_REQ_ALLOW_COMPONENT_DEFAULT_VALUE SYSRES_CONST_REQ_ALLOW_RECORD_DEFAULT_VALUE SYSRES_CONST_REQ_ALLOW_SERVER_COMPONENT_DEFAULT_VALUE SYSRES_CONST_REQ_MODE_AVAILABLE_CODE SYSRES_CONST_REQ_MODE_EDIT_CODE SYSRES_CONST_REQ_MODE_HIDDEN_CODE SYSRES_CONST_REQ_MODE_NOT_AVAILABLE_CODE SYSRES_CONST_REQ_MODE_VIEW_CODE SYSRES_CONST_REQ_NUMBER_REQUISITE_CODE SYSRES_CONST_REQ_SECTION_VALUE SYSRES_CONST_REQ_TYPE_VALUE SYSRES_CONST_REQUISITE_FORMAT_BY_UNIT SYSRES_CONST_REQUISITE_FORMAT_DATE_FULL SYSRES_CONST_REQUISITE_FORMAT_DATE_TIME SYSRES_CONST_REQUISITE_FORMAT_LEFT SYSRES_CONST_REQUISITE_FORMAT_RIGHT SYSRES_CONST_REQUISITE_FORMAT_WITHOUT_UNIT SYSRES_CONST_REQUISITE_NUMBER_REQUISITE_CODE SYSRES_CONST_REQUISITE_SECTION_ACTIONS SYSRES_CONST_REQUISITE_SECTION_BUTTON SYSRES_CONST_REQUISITE_SECTION_BUTTONS SYSRES_CONST_REQUISITE_SECTION_CARD SYSRES_CONST_REQUISITE_SECTION_TABLE SYSRES_CONST_REQUISITE_SECTION_TABLE10 SYSRES_CONST_REQUISITE_SECTION_TABLE11 SYSRES_CONST_REQUISITE_SECTION_TABLE12 SYSRES_CONST_REQUISITE_SECTION_TABLE13 SYSRES_CONST_REQUISITE_SECTION_TABLE14 SYSRES_CONST_REQUISITE_SECTION_TABLE15 SYSRES_CONST_REQUISITE_SECTION_TABLE16 SYSRES_CONST_REQUISITE_SECTION_TABLE17 SYSRES_CONST_REQUISITE_SECTION_TABLE18 SYSRES_CONST_REQUISITE_SECTION_TABLE19 SYSRES_CONST_REQUISITE_SECTION_TABLE2 SYSRES_CONST_REQUISITE_SECTION_TABLE20 SYSRES_CONST_REQUISITE_SECTION_TABLE21 SYSRES_CONST_REQUISITE_SECTION_TABLE22 SYSRES_CONST_REQUISITE_SECTION_TABLE23 SYSRES_CONST_REQUISITE_SECTION_TABLE24 SYSRES_CONST_REQUISITE_SECTION_TABLE3 SYSRES_CONST_REQUISITE_SECTION_TABLE4 SYSRES_CONST_REQUISITE_SECTION_TABLE5 SYSRES_CONST_REQUISITE_SECTION_TABLE6 SYSRES_CONST_REQUISITE_SECTION_TABLE7 SYSRES_CONST_REQUISITE_SECTION_TABLE8 SYSRES_CONST_REQUISITE_SECTION_TABLE9 SYSRES_CONST_REQUISITES_PSEUDOREFERENCE_REQUISITE_NUMBER_REQUISITE_CODE SYSRES_CONST_RIGHT_ALIGNMENT_CODE SYSRES_CONST_ROLES_REFERENCE_CODE SYSRES_CONST_ROUTE_STEP_AFTER_RUS SYSRES_CONST_ROUTE_STEP_AND_CONDITION_RUS SYSRES_CONST_ROUTE_STEP_OR_CONDITION_RUS SYSRES_CONST_ROUTE_TYPE_COMPLEX SYSRES_CONST_ROUTE_TYPE_PARALLEL SYSRES_CONST_ROUTE_TYPE_SERIAL SYSRES_CONST_SBDATASETDESC_NEGATIVE_VALUE SYSRES_CONST_SBDATASETDESC_POSITIVE_VALUE SYSRES_CONST_SBVIEWSDESC_POSITIVE_VALUE SYSRES_CONST_SCRIPT_BLOCK_DESCRIPTION SYSRES_CONST_SEARCH_BY_TEXT_REQUISITE_CODE SYSRES_CONST_SEARCHES_COMPONENT_CONTENT SYSRES_CONST_SEARCHES_CRITERIA_ACTION_NAME SYSRES_CONST_SEARCHES_EDOC_CONTENT SYSRES_CONST_SEARCHES_FOLDER_CONTENT SYSRES_CONST_SEARCHES_JOB_CONTENT SYSRES_CONST_SEARCHES_REFERENCE_CODE SYSRES_CONST_SEARCHES_TASK_CONTENT SYSRES_CONST_SECOND_CHAR SYSRES_CONST_SECTION_REQUISITE_ACTIONS_VALUE SYSRES_CONST_SECTION_REQUISITE_CARD_VALUE SYSRES_CONST_SECTION_REQUISITE_CODE SYSRES_CONST_SECTION_REQUISITE_DETAIL_1_VALUE SYSRES_CONST_SECTION_REQUISITE_DETAIL_2_VALUE SYSRES_CONST_SECTION_REQUISITE_DETAIL_3_VALUE SYSRES_CONST_SECTION_REQUISITE_DETAIL_4_VALUE SYSRES_CONST_SECTION_REQUISITE_DETAIL_5_VALUE SYSRES_CONST_SECTION_REQUISITE_DETAIL_6_VALUE SYSRES_CONST_SELECT_REFERENCE_MODE_NAME SYSRES_CONST_SELECT_TYPE_SELECTABLE SYSRES_CONST_SELECT_TYPE_SELECTABLE_ONLY_CHILD SYSRES_CONST_SELECT_TYPE_SELECTABLE_WITH_CHILD SYSRES_CONST_SELECT_TYPE_UNSLECTABLE SYSRES_CONST_SERVER_TYPE_MAIN SYSRES_CONST_SERVICE_USER_CATEGORY_FIELD_VALUE SYSRES_CONST_SETTINGS_USER_REQUISITE_CODE SYSRES_CONST_SIGNATURE_AND_ENCODE_CERTIFICATE_TYPE_CODE SYSRES_CONST_SIGNATURE_CERTIFICATE_TYPE_CODE SYSRES_CONST_SINGULAR_TITLE_REQUISITE_CODE SYSRES_CONST_SQL_SERVER_AUTHENTIFICATION_FLAG_VALUE_CODE SYSRES_CONST_SQL_SERVER_ENCODE_AUTHENTIFICATION_FLAG_VALUE_CODE SYSRES_CONST_STANDART_ROUTE_REFERENCE_CODE SYSRES_CONST_STANDART_ROUTE_REFERENCE_COMMENT_REQUISITE_CODE SYSRES_CONST_STANDART_ROUTES_GROUPS_REFERENCE_CODE SYSRES_CONST_STATE_REQ_NAME SYSRES_CONST_STATE_REQUISITE_ACTIVE_VALUE SYSRES_CONST_STATE_REQUISITE_CLOSED_VALUE SYSRES_CONST_STATE_REQUISITE_CODE SYSRES_CONST_STATIC_ROLE_TYPE_CODE SYSRES_CONST_STATUS_PLAN_DEFAULT_VALUE SYSRES_CONST_STATUS_VALUE_AUTOCLEANING SYSRES_CONST_STATUS_VALUE_BLUE_SQUARE SYSRES_CONST_STATUS_VALUE_COMPLETE SYSRES_CONST_STATUS_VALUE_GREEN_SQUARE SYSRES_CONST_STATUS_VALUE_ORANGE_SQUARE SYSRES_CONST_STATUS_VALUE_PURPLE_SQUARE SYSRES_CONST_STATUS_VALUE_RED_SQUARE SYSRES_CONST_STATUS_VALUE_SUSPEND SYSRES_CONST_STATUS_VALUE_YELLOW_SQUARE SYSRES_CONST_STDROUTE_SHOW_TO_USERS_REQUISITE_CODE SYSRES_CONST_STORAGE_TYPE_FILE SYSRES_CONST_STORAGE_TYPE_SQL_SERVER SYSRES_CONST_STR_REQUISITE SYSRES_CONST_STRIKEOUT_LIFE_CYCLE_STAGE_DRAW_STYLE SYSRES_CONST_STRING_FORMAT_LEFT_ALIGN_CHAR SYSRES_CONST_STRING_FORMAT_RIGHT_ALIGN_CHAR SYSRES_CONST_STRING_REQUISITE_CODE SYSRES_CONST_STRING_REQUISITE_TYPE SYSRES_CONST_STRING_TYPE_CHAR SYSRES_CONST_SUBSTITUTES_PSEUDOREFERENCE_CODE SYSRES_CONST_SUBTASK_BLOCK_DESCRIPTION SYSRES_CONST_SYSTEM_SETTING_CURRENT_USER_PARAM_VALUE SYSRES_CONST_SYSTEM_SETTING_EMPTY_VALUE_PARAM_VALUE SYSRES_CONST_SYSTEM_VERSION_COMMENT SYSRES_CONST_TASK_ACCESS_TYPE_ALL SYSRES_CONST_TASK_ACCESS_TYPE_ALL_MEMBERS SYSRES_CONST_TASK_ACCESS_TYPE_MANUAL SYSRES_CONST_TASK_ENCODE_TYPE_CERTIFICATION SYSRES_CONST_TASK_ENCODE_TYPE_CERTIFICATION_AND_PASSWORD SYSRES_CONST_TASK_ENCODE_TYPE_NONE SYSRES_CONST_TASK_ENCODE_TYPE_PASSWORD SYSRES_CONST_TASK_ROUTE_ALL_CONDITION SYSRES_CONST_TASK_ROUTE_AND_CONDITION SYSRES_CONST_TASK_ROUTE_OR_CONDITION SYSRES_CONST_TASK_STATE_ABORTED SYSRES_CONST_TASK_STATE_COMPLETE SYSRES_CONST_TASK_STATE_CONTINUED SYSRES_CONST_TASK_STATE_CONTROL SYSRES_CONST_TASK_STATE_INIT SYSRES_CONST_TASK_STATE_WORKING SYSRES_CONST_TASK_TITLE SYSRES_CONST_TASK_TYPES_GROUPS_REFERENCE_CODE SYSRES_CONST_TASK_TYPES_REFERENCE_CODE SYSRES_CONST_TEMPLATES_REFERENCE_CODE SYSRES_CONST_TEST_DATE_REQUISITE_NAME SYSRES_CONST_TEST_DEV_DATABASE_NAME SYSRES_CONST_TEST_DEV_SYSTEM_CODE SYSRES_CONST_TEST_EDMS_DATABASE_NAME SYSRES_CONST_TEST_EDMS_MAIN_CODE SYSRES_CONST_TEST_EDMS_MAIN_DB_NAME SYSRES_CONST_TEST_EDMS_SECOND_CODE SYSRES_CONST_TEST_EDMS_SECOND_DB_NAME SYSRES_CONST_TEST_EDMS_SYSTEM_CODE SYSRES_CONST_TEST_NUMERIC_REQUISITE_NAME SYSRES_CONST_TEXT_REQUISITE SYSRES_CONST_TEXT_REQUISITE_CODE SYSRES_CONST_TEXT_REQUISITE_TYPE SYSRES_CONST_TEXT_TYPE_CHAR SYSRES_CONST_TYPE_CODE_REQUISITE_CODE SYSRES_CONST_TYPE_REQUISITE_CODE SYSRES_CONST_UNDEFINED_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_UNITS_SECTION_ID_REQUISITE_CODE SYSRES_CONST_UNITS_SECTION_REQUISITE_CODE SYSRES_CONST_UNOPERATING_RECORD_FLAG_VALUE_CODE SYSRES_CONST_UNSTORED_DATA_REQUISITE_CODE SYSRES_CONST_UNSTORED_DATA_REQUISITE_NAME SYSRES_CONST_USE_ACCESS_TYPE_CODE SYSRES_CONST_USE_ACCESS_TYPE_NAME SYSRES_CONST_USER_ACCOUNT_TYPE_VALUE_CODE SYSRES_CONST_USER_ADDITIONAL_INFORMATION_REQUISITE_CODE SYSRES_CONST_USER_AND_GROUP_ID_FROM_PSEUDOREFERENCE_REQUISITE_CODE SYSRES_CONST_USER_CATEGORY_NORMAL SYSRES_CONST_USER_CERTIFICATE_REQUISITE_CODE SYSRES_CONST_USER_CERTIFICATE_STATE_REQUISITE_CODE SYSRES_CONST_USER_CERTIFICATE_SUBJECT_NAME_REQUISITE_CODE SYSRES_CONST_USER_CERTIFICATE_THUMBPRINT_REQUISITE_CODE SYSRES_CONST_USER_COMMON_CATEGORY SYSRES_CONST_USER_COMMON_CATEGORY_CODE SYSRES_CONST_USER_FULL_NAME_REQUISITE_CODE SYSRES_CONST_USER_GROUP_TYPE_REQUISITE_CODE SYSRES_CONST_USER_LOGIN_REQUISITE_CODE SYSRES_CONST_USER_REMOTE_CONTROLLER_REQUISITE_CODE SYSRES_CONST_USER_REMOTE_SYSTEM_REQUISITE_CODE SYSRES_CONST_USER_RIGHTS_T_REQUISITE_CODE SYSRES_CONST_USER_SERVER_NAME_REQUISITE_CODE SYSRES_CONST_USER_SERVICE_CATEGORY SYSRES_CONST_USER_SERVICE_CATEGORY_CODE SYSRES_CONST_USER_STATUS_ADMINISTRATOR_CODE SYSRES_CONST_USER_STATUS_ADMINISTRATOR_NAME SYSRES_CONST_USER_STATUS_DEVELOPER_CODE SYSRES_CONST_USER_STATUS_DEVELOPER_NAME SYSRES_CONST_USER_STATUS_DISABLED_CODE SYSRES_CONST_USER_STATUS_DISABLED_NAME SYSRES_CONST_USER_STATUS_SYSTEM_DEVELOPER_CODE SYSRES_CONST_USER_STATUS_USER_CODE SYSRES_CONST_USER_STATUS_USER_NAME SYSRES_CONST_USER_STATUS_USER_NAME_DEPRECATED SYSRES_CONST_USER_TYPE_FIELD_VALUE_USER SYSRES_CONST_USER_TYPE_REQUISITE_CODE SYSRES_CONST_USERS_CONTROLLER_REQUISITE_CODE SYSRES_CONST_USERS_IS_MAIN_SERVER_REQUISITE_CODE SYSRES_CONST_USERS_REFERENCE_CODE SYSRES_CONST_USERS_REGISTRATION_CERTIFICATES_ACTION_NAME SYSRES_CONST_USERS_REQUISITE_CODE SYSRES_CONST_USERS_SYSTEM_REQUISITE_CODE SYSRES_CONST_USERS_USER_ACCESS_RIGHTS_TYPR_REQUISITE_CODE SYSRES_CONST_USERS_USER_AUTHENTICATION_REQUISITE_CODE SYSRES_CONST_USERS_USER_COMPONENT_REQUISITE_CODE SYSRES_CONST_USERS_USER_GROUP_REQUISITE_CODE SYSRES_CONST_USERS_VIEW_CERTIFICATES_ACTION_NAME SYSRES_CONST_VIEW_DEFAULT_CODE SYSRES_CONST_VIEW_DEFAULT_NAME SYSRES_CONST_VIEWER_REQUISITE_CODE SYSRES_CONST_WAITING_BLOCK_DESCRIPTION SYSRES_CONST_WIZARD_FORM_LABEL_TEST_STRING SYSRES_CONST_WIZARD_QUERY_PARAM_HEIGHT_ETALON_STRING SYSRES_CONST_WIZARD_REFERENCE_COMMENT_REQUISITE_CODE SYSRES_CONST_WORK_RULES_DESCRIPTION_REQUISITE_CODE SYSRES_CONST_WORK_TIME_CALENDAR_REFERENCE_CODE SYSRES_CONST_WORK_WORKFLOW_HARD_ROUTE_TYPE_VALUE SYSRES_CONST_WORK_WORKFLOW_HARD_ROUTE_TYPE_VALUE_CODE SYSRES_CONST_WORK_WORKFLOW_HARD_ROUTE_TYPE_VALUE_CODE_RUS SYSRES_CONST_WORK_WORKFLOW_SOFT_ROUTE_TYPE_VALUE_CODE_RUS SYSRES_CONST_WORKFLOW_ROUTE_TYPR_HARD SYSRES_CONST_WORKFLOW_ROUTE_TYPR_SOFT SYSRES_CONST_XML_ENCODING SYSRES_CONST_XREC_STAT_REQUISITE_CODE SYSRES_CONST_XRECID_FIELD_NAME SYSRES_CONST_YES SYSRES_CONST_YES_NO_2_REQUISITE_CODE SYSRES_CONST_YES_NO_REQUISITE_CODE SYSRES_CONST_YES_NO_T_REF_TYPE_REQUISITE_CODE SYSRES_CONST_YES_PICK_VALUE SYSRES_CONST_YES_VALUE CR FALSE nil NO_VALUE NULL TAB TRUE YES_VALUE ADMINISTRATORS_GROUP_NAME CUSTOMIZERS_GROUP_NAME DEVELOPERS_GROUP_NAME SERVICE_USERS_GROUP_NAME DECISION_BLOCK_FIRST_OPERAND_PROPERTY DECISION_BLOCK_NAME_PROPERTY DECISION_BLOCK_OPERATION_PROPERTY DECISION_BLOCK_RESULT_TYPE_PROPERTY DECISION_BLOCK_SECOND_OPERAND_PROPERTY ANY_FILE_EXTENTION COMPRESSED_DOCUMENT_EXTENSION EXTENDED_DOCUMENT_EXTENSION SHORT_COMPRESSED_DOCUMENT_EXTENSION SHORT_EXTENDED_DOCUMENT_EXTENSION JOB_BLOCK_ABORT_DEADLINE_PROPERTY JOB_BLOCK_AFTER_FINISH_EVENT JOB_BLOCK_AFTER_QUERY_PARAMETERS_EVENT JOB_BLOCK_ATTACHMENT_PROPERTY JOB_BLOCK_ATTACHMENTS_RIGHTS_GROUP_PROPERTY JOB_BLOCK_ATTACHMENTS_RIGHTS_TYPE_PROPERTY JOB_BLOCK_BEFORE_QUERY_PARAMETERS_EVENT JOB_BLOCK_BEFORE_START_EVENT JOB_BLOCK_CREATED_JOBS_PROPERTY JOB_BLOCK_DEADLINE_PROPERTY JOB_BLOCK_EXECUTION_RESULTS_PROPERTY JOB_BLOCK_IS_PARALLEL_PROPERTY JOB_BLOCK_IS_RELATIVE_ABORT_DEADLINE_PROPERTY JOB_BLOCK_IS_RELATIVE_DEADLINE_PROPERTY JOB_BLOCK_JOB_TEXT_PROPERTY JOB_BLOCK_NAME_PROPERTY JOB_BLOCK_NEED_SIGN_ON_PERFORM_PROPERTY JOB_BLOCK_PERFORMER_PROPERTY JOB_BLOCK_RELATIVE_ABORT_DEADLINE_TYPE_PROPERTY JOB_BLOCK_RELATIVE_DEADLINE_TYPE_PROPERTY JOB_BLOCK_SUBJECT_PROPERTY ENGLISH_LANGUAGE_CODE RUSSIAN_LANGUAGE_CODE smHidden smMaximized smMinimized smNormal wmNo wmYes COMPONENT_TOKEN_LINK_KIND DOCUMENT_LINK_KIND EDOCUMENT_LINK_KIND FOLDER_LINK_KIND JOB_LINK_KIND REFERENCE_LINK_KIND TASK_LINK_KIND COMPONENT_TOKEN_LOCK_TYPE EDOCUMENT_VERSION_LOCK_TYPE MONITOR_BLOCK_AFTER_FINISH_EVENT MONITOR_BLOCK_BEFORE_START_EVENT MONITOR_BLOCK_DEADLINE_PROPERTY MONITOR_BLOCK_INTERVAL_PROPERTY MONITOR_BLOCK_INTERVAL_TYPE_PROPERTY MONITOR_BLOCK_IS_RELATIVE_DEADLINE_PROPERTY MONITOR_BLOCK_NAME_PROPERTY MONITOR_BLOCK_RELATIVE_DEADLINE_TYPE_PROPERTY MONITOR_BLOCK_SEARCH_SCRIPT_PROPERTY NOTICE_BLOCK_AFTER_FINISH_EVENT NOTICE_BLOCK_ATTACHMENT_PROPERTY NOTICE_BLOCK_ATTACHMENTS_RIGHTS_GROUP_PROPERTY NOTICE_BLOCK_ATTACHMENTS_RIGHTS_TYPE_PROPERTY NOTICE_BLOCK_BEFORE_START_EVENT NOTICE_BLOCK_CREATED_NOTICES_PROPERTY NOTICE_BLOCK_DEADLINE_PROPERTY NOTICE_BLOCK_IS_RELATIVE_DEADLINE_PROPERTY NOTICE_BLOCK_NAME_PROPERTY NOTICE_BLOCK_NOTICE_TEXT_PROPERTY NOTICE_BLOCK_PERFORMER_PROPERTY NOTICE_BLOCK_RELATIVE_DEADLINE_TYPE_PROPERTY NOTICE_BLOCK_SUBJECT_PROPERTY dseAfterCancel dseAfterClose dseAfterDelete dseAfterDeleteOutOfTransaction dseAfterInsert dseAfterOpen dseAfterScroll dseAfterUpdate dseAfterUpdateOutOfTransaction dseBeforeCancel dseBeforeClose dseBeforeDelete dseBeforeDetailUpdate dseBeforeInsert dseBeforeOpen dseBeforeUpdate dseOnAnyRequisiteChange dseOnCloseRecord dseOnDeleteError dseOnOpenRecord dseOnPrepareUpdate dseOnUpdateError dseOnUpdateRatifiedRecord dseOnValidDelete dseOnValidUpdate reOnChange reOnChangeValues SELECTION_BEGIN_ROUTE_EVENT SELECTION_END_ROUTE_EVENT CURRENT_PERIOD_IS_REQUIRED PREVIOUS_CARD_TYPE_NAME SHOW_RECORD_PROPERTIES_FORM ACCESS_RIGHTS_SETTING_DIALOG_CODE ADMINISTRATOR_USER_CODE ANALYTIC_REPORT_TYPE asrtHideLocal asrtHideRemote CALCULATED_ROLE_TYPE_CODE COMPONENTS_REFERENCE_DEVELOPER_VIEW_CODE DCTS_TEST_PROTOCOLS_FOLDER_PATH E_EDOC_VERSION_ALREADY_APPROVINGLY_SIGNED E_EDOC_VERSION_ALREADY_APPROVINGLY_SIGNED_BY_USER 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deactivate declare declare_constvalue declare_dimensions declare_fundamental_dimensions declare_fundamental_units declare_qty declare_translated declare_unit_conversion declare_units declare_weights decsym defcon define define_alt_display define_variable defint defmatch defrule defstruct deftaylor degree_sequence del delete deleten delta demo demoivre denom depends derivdegree derivlist describe desolve determinant dfloat dgauss_a dgauss_b dgeev dgemm dgeqrf dgesv dgesvd diag diagmatrix diag_matrix diagmatrixp diameter diff digitcharp dimacs_export dimacs_import dimension dimensionless dimensions dimensions_as_list direct directory discrete_freq disjoin disjointp disolate disp dispcon dispform dispfun dispJordan display disprule dispterms distrib divide divisors divsum dkummer_m dkummer_u dlange dodecahedron_graph dotproduct dotsimp dpart draw draw2d draw3d drawdf draw_file draw_graph dscalar echelon edge_coloring edge_connectivity edges eigens_by_jacobi eigenvalues eigenvectors eighth einstein eivals eivects elapsed_real_time elapsed_run_time ele2comp ele2polynome ele2pui elem elementp elevation_grid elim elim_allbut eliminate eliminate_using ellipse elliptic_e elliptic_ec elliptic_eu elliptic_f elliptic_kc elliptic_pi ematrix empty_graph emptyp endcons entermatrix entertensor entier equal equalp equiv_classes erf erfc erf_generalized erfi errcatch error errormsg errors euler ev eval_string evenp every evolution evolution2d evundiff example exp expand expandwrt expandwrt_factored expint expintegral_chi expintegral_ci expintegral_e expintegral_e1 expintegral_ei expintegral_e_simplify expintegral_li expintegral_shi expintegral_si explicit explose exponentialize express expt exsec extdiff extract_linear_equations extremal_subset ezgcd %f f90 facsum factcomb factor factorfacsum factorial factorout factorsum facts fast_central_elements fast_linsolve fasttimes featurep fernfale fft fib fibtophi fifth filename_merge file_search file_type fillarray findde find_root find_root_abs find_root_error find_root_rel first fix flatten flength float floatnump floor flower_snark flush flush1deriv flushd flushnd flush_output fmin_cobyla forget fortran fourcos fourexpand fourier fourier_elim fourint fourintcos fourintsin foursimp foursin fourth fposition frame_bracket freeof freshline fresnel_c fresnel_s from_adjacency_matrix frucht_graph full_listify fullmap fullmapl fullratsimp fullratsubst fullsetify funcsolve fundamental_dimensions fundamental_units fundef funmake funp fv g0 g1 gamma gamma_greek gamma_incomplete gamma_incomplete_generalized gamma_incomplete_regularized gauss gauss_a gauss_b gaussprob gcd gcdex gcdivide gcfac gcfactor gd generalized_lambert_w genfact gen_laguerre genmatrix gensym geo_amortization geo_annuity_fv geo_annuity_pv geomap geometric geometric_mean geosum get getcurrentdirectory get_edge_weight getenv get_lu_factors get_output_stream_string get_pixel get_plot_option get_tex_environment get_tex_environment_default get_vertex_label gfactor gfactorsum ggf girth global_variances gn gnuplot_close gnuplot_replot gnuplot_reset gnuplot_restart gnuplot_start go Gosper GosperSum gr2d gr3d gradef gramschmidt graph6_decode graph6_encode graph6_export graph6_import graph_center graph_charpoly graph_eigenvalues graph_flow graph_order graph_periphery graph_product graph_size graph_union great_rhombicosidodecahedron_graph great_rhombicuboctahedron_graph grid_graph grind grobner_basis grotzch_graph hamilton_cycle hamilton_path hankel hankel_1 hankel_2 harmonic harmonic_mean hav heawood_graph hermite hessian hgfred hilbertmap hilbert_matrix hipow histogram histogram_description hodge horner hypergeometric i0 i1 %ibes ic1 ic2 ic_convert ichr1 ichr2 icosahedron_graph icosidodecahedron_graph icurvature ident identfor identity idiff idim idummy ieqn %if ifactors iframes ifs igcdex igeodesic_coords ilt image imagpart imetric implicit implicit_derivative implicit_plot indexed_tensor indices induced_subgraph inferencep inference_result infix info_display init_atensor init_ctensor in_neighbors innerproduct inpart inprod inrt integerp integer_partitions integrate intersect intersection intervalp intopois intosum invariant1 invariant2 inverse_fft inverse_jacobi_cd inverse_jacobi_cn inverse_jacobi_cs inverse_jacobi_dc inverse_jacobi_dn inverse_jacobi_ds inverse_jacobi_nc inverse_jacobi_nd inverse_jacobi_ns inverse_jacobi_sc inverse_jacobi_sd inverse_jacobi_sn invert invert_by_adjoint invert_by_lu inv_mod irr is is_biconnected is_bipartite is_connected is_digraph is_edge_in_graph is_graph is_graph_or_digraph ishow is_isomorphic isolate isomorphism is_planar isqrt isreal_p is_sconnected is_tree is_vertex_in_graph items_inference %j j0 j1 jacobi jacobian jacobi_cd jacobi_cn jacobi_cs jacobi_dc jacobi_dn jacobi_ds jacobi_nc jacobi_nd jacobi_ns jacobi_p jacobi_sc jacobi_sd jacobi_sn JF jn join jordan julia julia_set julia_sin %k kdels kdelta kill killcontext kostka kron_delta kronecker_product kummer_m kummer_u kurtosis kurtosis_bernoulli kurtosis_beta kurtosis_binomial kurtosis_chi2 kurtosis_continuous_uniform kurtosis_discrete_uniform kurtosis_exp kurtosis_f kurtosis_gamma kurtosis_general_finite_discrete kurtosis_geometric kurtosis_gumbel kurtosis_hypergeometric kurtosis_laplace kurtosis_logistic kurtosis_lognormal kurtosis_negative_binomial kurtosis_noncentral_chi2 kurtosis_noncentral_student_t kurtosis_normal kurtosis_pareto kurtosis_poisson kurtosis_rayleigh kurtosis_student_t kurtosis_weibull label labels lagrange laguerre lambda lambert_w laplace laplacian_matrix last lbfgs lc2kdt lcharp lc_l lcm lc_u ldefint ldisp ldisplay legendre_p legendre_q leinstein length let letrules letsimp levi_civita lfreeof lgtreillis lhs li liediff limit Lindstedt linear linearinterpol linear_program linear_regression line_graph linsolve listarray list_correlations listify list_matrix_entries list_nc_monomials listoftens listofvars listp lmax lmin load loadfile local locate_matrix_entry log logcontract log_gamma lopow lorentz_gauge lowercasep lpart lratsubst lreduce lriemann lsquares_estimates lsquares_estimates_approximate lsquares_estimates_exact lsquares_mse lsquares_residual_mse lsquares_residuals lsum ltreillis lu_backsub lucas lu_factor %m macroexpand macroexpand1 make_array makebox makefact makegamma make_graph make_level_picture makelist makeOrders make_poly_continent make_poly_country make_polygon make_random_state make_rgb_picture makeset make_string_input_stream make_string_output_stream make_transform mandelbrot mandelbrot_set map mapatom maplist matchdeclare matchfix mat_cond mat_fullunblocker mat_function mathml_display mat_norm matrix matrixmap matrixp matrix_size mattrace mat_trace mat_unblocker max max_clique max_degree max_flow maximize_lp max_independent_set max_matching maybe md5sum mean mean_bernoulli mean_beta mean_binomial mean_chi2 mean_continuous_uniform mean_deviation mean_discrete_uniform mean_exp mean_f mean_gamma mean_general_finite_discrete mean_geometric mean_gumbel mean_hypergeometric mean_laplace mean_logistic mean_lognormal mean_negative_binomial mean_noncentral_chi2 mean_noncentral_student_t mean_normal mean_pareto mean_poisson mean_rayleigh mean_student_t mean_weibull median median_deviation member mesh metricexpandall mgf1_sha1 min min_degree min_edge_cut minfactorial minimalPoly minimize_lp minimum_spanning_tree minor minpack_lsquares minpack_solve min_vertex_cover min_vertex_cut mkdir mnewton mod mode_declare mode_identity ModeMatrix moebius mon2schur mono monomial_dimensions multibernstein_poly multi_display_for_texinfo multi_elem multinomial multinomial_coeff multi_orbit multiplot_mode multi_pui multsym multthru mycielski_graph nary natural_unit nc_degree ncexpt ncharpoly negative_picture neighbors new newcontext newdet new_graph newline newton new_variable next_prime nicedummies niceindices ninth nofix nonarray noncentral_moment nonmetricity nonnegintegerp nonscalarp nonzeroandfreeof notequal nounify nptetrad npv nroots nterms ntermst nthroot nullity nullspace num numbered_boundaries numberp number_to_octets num_distinct_partitions numerval numfactor num_partitions nusum nzeta nzetai nzetar octets_to_number octets_to_oid odd_girth oddp ode2 ode_check odelin oid_to_octets op opena opena_binary openr openr_binary openw openw_binary operatorp opsubst optimize %or orbit orbits ordergreat ordergreatp orderless orderlessp orthogonal_complement orthopoly_recur orthopoly_weight outermap out_neighbors outofpois pade parabolic_cylinder_d parametric parametric_surface parg parGosper parse_string parse_timedate part part2cont partfrac partition partition_set partpol path_digraph path_graph pathname_directory pathname_name pathname_type pdf_bernoulli pdf_beta pdf_binomial pdf_cauchy pdf_chi2 pdf_continuous_uniform pdf_discrete_uniform pdf_exp pdf_f pdf_gamma pdf_general_finite_discrete pdf_geometric pdf_gumbel pdf_hypergeometric pdf_laplace pdf_logistic pdf_lognormal pdf_negative_binomial pdf_noncentral_chi2 pdf_noncentral_student_t pdf_normal pdf_pareto pdf_poisson pdf_rank_sum pdf_rayleigh pdf_signed_rank pdf_student_t pdf_weibull pearson_skewness permanent permut permutation permutations petersen_graph petrov pickapart picture_equalp picturep piechart piechart_description planar_embedding playback plog plot2d plot3d plotdf ploteq plsquares pochhammer points poisdiff poisexpt poisint poismap poisplus poissimp poissubst poistimes poistrim polar polarform polartorect polar_to_xy poly_add poly_buchberger poly_buchberger_criterion poly_colon_ideal poly_content polydecomp poly_depends_p poly_elimination_ideal poly_exact_divide poly_expand poly_expt poly_gcd polygon poly_grobner poly_grobner_equal poly_grobner_member poly_grobner_subsetp poly_ideal_intersection poly_ideal_polysaturation poly_ideal_polysaturation1 poly_ideal_saturation poly_ideal_saturation1 poly_lcm poly_minimization polymod poly_multiply polynome2ele polynomialp poly_normal_form poly_normalize poly_normalize_list poly_polysaturation_extension poly_primitive_part poly_pseudo_divide poly_reduced_grobner poly_reduction poly_saturation_extension poly_s_polynomial poly_subtract polytocompanion pop postfix potential power_mod powerseries powerset prefix prev_prime primep primes principal_components print printf printfile print_graph printpois printprops prodrac product properties propvars psi psubst ptriangularize pui pui2comp pui2ele pui2polynome pui_direct puireduc push put pv qput qrange qty quad_control quad_qag quad_qagi quad_qagp quad_qags quad_qawc quad_qawf quad_qawo quad_qaws quadrilateral quantile quantile_bernoulli quantile_beta quantile_binomial quantile_cauchy quantile_chi2 quantile_continuous_uniform quantile_discrete_uniform quantile_exp quantile_f quantile_gamma quantile_general_finite_discrete quantile_geometric quantile_gumbel quantile_hypergeometric quantile_laplace quantile_logistic quantile_lognormal quantile_negative_binomial quantile_noncentral_chi2 quantile_noncentral_student_t quantile_normal quantile_pareto quantile_poisson quantile_rayleigh quantile_student_t quantile_weibull quartile_skewness quit qunit quotient racah_v racah_w radcan radius random random_bernoulli random_beta random_binomial random_bipartite_graph random_cauchy random_chi2 random_continuous_uniform random_digraph random_discrete_uniform random_exp random_f random_gamma random_general_finite_discrete random_geometric random_graph random_graph1 random_gumbel random_hypergeometric random_laplace random_logistic random_lognormal random_negative_binomial random_network random_noncentral_chi2 random_noncentral_student_t random_normal random_pareto random_permutation random_poisson random_rayleigh random_regular_graph random_student_t random_tournament random_tree random_weibull range rank rat ratcoef ratdenom ratdiff ratdisrep ratexpand ratinterpol rational rationalize ratnumer ratnump ratp ratsimp ratsubst ratvars ratweight read read_array read_binary_array read_binary_list read_binary_matrix readbyte readchar read_hashed_array readline read_list read_matrix read_nested_list readonly read_xpm real_imagpart_to_conjugate realpart realroots rearray rectangle rectform rectform_log_if_constant recttopolar rediff reduce_consts reduce_order region region_boundaries region_boundaries_plus rem remainder remarray rembox remcomps remcon remcoord remfun remfunction remlet remove remove_constvalue remove_dimensions remove_edge remove_fundamental_dimensions remove_fundamental_units remove_plot_option remove_vertex rempart remrule remsym remvalue rename rename_file reset reset_displays residue resolvante resolvante_alternee1 resolvante_bipartite resolvante_diedrale resolvante_klein resolvante_klein3 resolvante_produit_sym resolvante_unitaire resolvante_vierer rest resultant return reveal reverse revert revert2 rgb2level rhs ricci riemann rinvariant risch rk rmdir rncombine romberg room rootscontract round row rowop rowswap rreduce run_testsuite %s save saving scalarp scaled_bessel_i scaled_bessel_i0 scaled_bessel_i1 scalefactors scanmap scatterplot scatterplot_description scene schur2comp sconcat scopy scsimp scurvature sdowncase sec sech second sequal sequalignore set_alt_display setdifference set_draw_defaults set_edge_weight setelmx setequalp setify setp set_partitions set_plot_option set_prompt set_random_state set_tex_environment set_tex_environment_default setunits setup_autoload set_up_dot_simplifications set_vertex_label seventh sexplode sf sha1sum sha256sum shortest_path shortest_weighted_path show showcomps showratvars sierpinskiale sierpinskimap sign signum similaritytransform simp_inequality simplify_sum simplode simpmetderiv simtran sin sinh sinsert sinvertcase sixth skewness skewness_bernoulli skewness_beta skewness_binomial skewness_chi2 skewness_continuous_uniform skewness_discrete_uniform skewness_exp skewness_f skewness_gamma skewness_general_finite_discrete skewness_geometric skewness_gumbel skewness_hypergeometric skewness_laplace skewness_logistic skewness_lognormal skewness_negative_binomial skewness_noncentral_chi2 skewness_noncentral_student_t skewness_normal skewness_pareto skewness_poisson skewness_rayleigh skewness_student_t skewness_weibull slength smake small_rhombicosidodecahedron_graph small_rhombicuboctahedron_graph smax smin smismatch snowmap snub_cube_graph snub_dodecahedron_graph solve solve_rec solve_rec_rat some somrac sort sparse6_decode sparse6_encode sparse6_export sparse6_import specint spherical spherical_bessel_j spherical_bessel_y spherical_hankel1 spherical_hankel2 spherical_harmonic spherical_to_xyz splice split sposition sprint sqfr sqrt sqrtdenest sremove sremovefirst sreverse ssearch ssort sstatus ssubst ssubstfirst staircase standardize standardize_inverse_trig starplot starplot_description status std std1 std_bernoulli std_beta std_binomial std_chi2 std_continuous_uniform std_discrete_uniform std_exp std_f std_gamma std_general_finite_discrete std_geometric std_gumbel std_hypergeometric std_laplace std_logistic std_lognormal std_negative_binomial std_noncentral_chi2 std_noncentral_student_t std_normal std_pareto std_poisson std_rayleigh std_student_t std_weibull stemplot stirling stirling1 stirling2 strim striml strimr string stringout stringp strong_components struve_h struve_l sublis sublist sublist_indices submatrix subsample subset subsetp subst substinpart subst_parallel substpart substring subvar subvarp sum sumcontract summand_to_rec supcase supcontext symbolp symmdifference symmetricp system take_channel take_inference tan tanh taylor taylorinfo taylorp taylor_simplifier taytorat tcl_output tcontract tellrat tellsimp tellsimpafter tentex tenth test_mean test_means_difference test_normality test_proportion test_proportions_difference test_rank_sum test_sign test_signed_rank test_variance test_variance_ratio tex tex1 tex_display texput %th third throw time timedate timer timer_info tldefint tlimit todd_coxeter toeplitz tokens to_lisp topological_sort to_poly to_poly_solve totaldisrep totalfourier totient tpartpol trace tracematrix trace_options transform_sample translate translate_file transpose treefale tree_reduce treillis treinat triangle triangularize trigexpand trigrat trigreduce trigsimp trunc truncate truncated_cube_graph truncated_dodecahedron_graph truncated_icosahedron_graph truncated_tetrahedron_graph tr_warnings_get tube tutte_graph ueivects uforget ultraspherical underlying_graph undiff union unique uniteigenvectors unitp units unit_step unitvector unorder unsum untellrat untimer untrace uppercasep uricci uriemann uvect vandermonde_matrix var var1 var_bernoulli var_beta var_binomial var_chi2 var_continuous_uniform var_discrete_uniform var_exp var_f var_gamma var_general_finite_discrete var_geometric var_gumbel var_hypergeometric var_laplace var_logistic var_lognormal var_negative_binomial var_noncentral_chi2 var_noncentral_student_t var_normal var_pareto var_poisson var_rayleigh var_student_t var_weibull vector vectorpotential vectorsimp verbify vers vertex_coloring vertex_connectivity vertex_degree vertex_distance vertex_eccentricity vertex_in_degree vertex_out_degree vertices vertices_to_cycle vertices_to_path %w weyl wheel_graph wiener_index wigner_3j wigner_6j wigner_9j with_stdout write_binary_data writebyte write_data writefile wronskian xreduce xthru %y Zeilberger zeroequiv zerofor zeromatrix zeromatrixp zeta zgeev zheev zlange zn_add_table zn_carmichael_lambda zn_characteristic_factors zn_determinant zn_factor_generators zn_invert_by_lu zn_log zn_mult_table absboxchar activecontexts adapt_depth additive adim aform algebraic algepsilon algexact aliases allbut all_dotsimp_denoms allocation allsym alphabetic animation antisymmetric arrays askexp assume_pos assume_pos_pred assumescalar asymbol atomgrad atrig1 axes axis_3d axis_bottom axis_left axis_right axis_top azimuth background background_color backsubst berlefact bernstein_explicit besselexpand 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erf_representation errormsg error_size error_syms error_type %e_to_numlog eval even evenfun evflag evfun ev_point expandwrt_denom expintexpand expintrep expon expop exptdispflag exptisolate exptsubst facexpand facsum_combine factlim factorflag factorial_expand factors_only fb feature features file_name file_output_append file_search_demo file_search_lisp file_search_maxima|10 file_search_tests file_search_usage file_type_lisp file_type_maxima|10 fill_color fill_density filled_func fixed_vertices flipflag float2bf font font_size fortindent fortspaces fpprec fpprintprec functions gamma_expand gammalim gdet genindex gensumnum GGFCFMAX GGFINFINITY globalsolve gnuplot_command gnuplot_curve_styles gnuplot_curve_titles gnuplot_default_term_command gnuplot_dumb_term_command gnuplot_file_args gnuplot_file_name gnuplot_out_file gnuplot_pdf_term_command gnuplot_pm3d gnuplot_png_term_command gnuplot_postamble gnuplot_preamble gnuplot_ps_term_command gnuplot_svg_term_command gnuplot_term gnuplot_view_args Gosper_in_Zeilberger gradefs grid grid2d grind halfangles head_angle head_both head_length head_type height hypergeometric_representation %iargs ibase icc1 icc2 icounter idummyx ieqnprint ifb ifc1 ifc2 ifg ifgi ifr iframe_bracket_form ifri igeowedge_flag ikt1 ikt2 imaginary inchar increasing infeval infinity inflag infolists inm inmc1 inmc2 intanalysis integer integervalued integrate_use_rootsof integration_constant integration_constant_counter interpolate_color intfaclim ip_grid ip_grid_in irrational isolate_wrt_times iterations itr julia_parameter %k1 %k2 keepfloat key key_pos kinvariant kt label label_alignment label_orientation labels lassociative lbfgs_ncorrections lbfgs_nfeval_max leftjust legend letrat let_rule_packages lfg lg lhospitallim limsubst linear linear_solver linechar linel|10 linenum line_type linewidth line_width linsolve_params linsolvewarn lispdisp listarith listconstvars listdummyvars lmxchar load_pathname loadprint logabs logarc logcb 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t="[A-Za-zА-Яа-яёЁ_!][A-Za-zА-Яа-яёЁ_0-9]*",a={className:"number",begin:e.NUMBER_RE,relevance:0},n={className:"string",variants:[{begin:'"',end:'"'},{begin:"'",end:"'"}]},i={className:"doctag",begin:"\\b(?:TODO|DONE|BEGIN|END|STUB|CHG|FIXME|NOTE|BUG|XXX)\\b",relevance:0},r={variants:[{className:"comment",begin:"//",end:"$",relevance:0,contains:[e.PHRASAL_WORDS_MODE,i]},{className:"comment",begin:"/\\*",end:"\\*/",relevance:0,contains:[e.PHRASAL_WORDS_MODE,i]}]},o={$pattern:t,keyword:"and и else иначе endexcept endfinally endforeach конецвсе endif конецесли endwhile конецпока except exitfor finally foreach все if если in в not не or или try while пока ",built_in:"SYSRES_CONST_ACCES_RIGHT_TYPE_EDIT SYSRES_CONST_ACCES_RIGHT_TYPE_FULL SYSRES_CONST_ACCES_RIGHT_TYPE_VIEW SYSRES_CONST_ACCESS_MODE_REQUISITE_CODE SYSRES_CONST_ACCESS_NO_ACCESS_VIEW SYSRES_CONST_ACCESS_NO_ACCESS_VIEW_CODE SYSRES_CONST_ACCESS_RIGHTS_ADD_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_ADD_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_RIGHTS_CHANGE_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_CHANGE_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_RIGHTS_DELETE_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_DELETE_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_RIGHTS_EXECUTE_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_EXECUTE_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_RIGHTS_NO_ACCESS_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_NO_ACCESS_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_RIGHTS_RATIFY_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_RATIFY_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_RIGHTS_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_VIEW SYSRES_CONST_ACCESS_RIGHTS_VIEW_CODE SYSRES_CONST_ACCESS_RIGHTS_VIEW_REQUISITE_CODE SYSRES_CONST_ACCESS_RIGHTS_VIEW_REQUISITE_YES_CODE SYSRES_CONST_ACCESS_TYPE_CHANGE SYSRES_CONST_ACCESS_TYPE_CHANGE_CODE SYSRES_CONST_ACCESS_TYPE_EXISTS SYSRES_CONST_ACCESS_TYPE_EXISTS_CODE SYSRES_CONST_ACCESS_TYPE_FULL SYSRES_CONST_ACCESS_TYPE_FULL_CODE SYSRES_CONST_ACCESS_TYPE_VIEW SYSRES_CONST_ACCESS_TYPE_VIEW_CODE SYSRES_CONST_ACTION_TYPE_ABORT SYSRES_CONST_ACTION_TYPE_ACCEPT SYSRES_CONST_ACTION_TYPE_ACCESS_RIGHTS SYSRES_CONST_ACTION_TYPE_ADD_ATTACHMENT SYSRES_CONST_ACTION_TYPE_CHANGE_CARD SYSRES_CONST_ACTION_TYPE_CHANGE_KIND SYSRES_CONST_ACTION_TYPE_CHANGE_STORAGE SYSRES_CONST_ACTION_TYPE_CONTINUE SYSRES_CONST_ACTION_TYPE_COPY SYSRES_CONST_ACTION_TYPE_CREATE SYSRES_CONST_ACTION_TYPE_CREATE_VERSION SYSRES_CONST_ACTION_TYPE_DELETE SYSRES_CONST_ACTION_TYPE_DELETE_ATTACHMENT SYSRES_CONST_ACTION_TYPE_DELETE_VERSION SYSRES_CONST_ACTION_TYPE_DISABLE_DELEGATE_ACCESS_RIGHTS SYSRES_CONST_ACTION_TYPE_ENABLE_DELEGATE_ACCESS_RIGHTS SYSRES_CONST_ACTION_TYPE_ENCRYPTION_BY_CERTIFICATE SYSRES_CONST_ACTION_TYPE_ENCRYPTION_BY_CERTIFICATE_AND_PASSWORD SYSRES_CONST_ACTION_TYPE_ENCRYPTION_BY_PASSWORD SYSRES_CONST_ACTION_TYPE_EXPORT_WITH_LOCK SYSRES_CONST_ACTION_TYPE_EXPORT_WITHOUT_LOCK SYSRES_CONST_ACTION_TYPE_IMPORT_WITH_UNLOCK SYSRES_CONST_ACTION_TYPE_IMPORT_WITHOUT_UNLOCK SYSRES_CONST_ACTION_TYPE_LIFE_CYCLE_STAGE SYSRES_CONST_ACTION_TYPE_LOCK SYSRES_CONST_ACTION_TYPE_LOCK_FOR_SERVER SYSRES_CONST_ACTION_TYPE_LOCK_MODIFY SYSRES_CONST_ACTION_TYPE_MARK_AS_READED SYSRES_CONST_ACTION_TYPE_MARK_AS_UNREADED SYSRES_CONST_ACTION_TYPE_MODIFY SYSRES_CONST_ACTION_TYPE_MODIFY_CARD SYSRES_CONST_ACTION_TYPE_MOVE_TO_ARCHIVE SYSRES_CONST_ACTION_TYPE_OFF_ENCRYPTION SYSRES_CONST_ACTION_TYPE_PASSWORD_CHANGE SYSRES_CONST_ACTION_TYPE_PERFORM SYSRES_CONST_ACTION_TYPE_RECOVER_FROM_LOCAL_COPY SYSRES_CONST_ACTION_TYPE_RESTART SYSRES_CONST_ACTION_TYPE_RESTORE_FROM_ARCHIVE SYSRES_CONST_ACTION_TYPE_REVISION SYSRES_CONST_ACTION_TYPE_SEND_BY_MAIL SYSRES_CONST_ACTION_TYPE_SIGN SYSRES_CONST_ACTION_TYPE_START SYSRES_CONST_ACTION_TYPE_UNLOCK SYSRES_CONST_ACTION_TYPE_UNLOCK_FROM_SERVER SYSRES_CONST_ACTION_TYPE_VERSION_STATE SYSRES_CONST_ACTION_TYPE_VERSION_VISIBILITY SYSRES_CONST_ACTION_TYPE_VIEW SYSRES_CONST_ACTION_TYPE_VIEW_SHADOW_COPY SYSRES_CONST_ACTION_TYPE_WORKFLOW_DESCRIPTION_MODIFY SYSRES_CONST_ACTION_TYPE_WRITE_HISTORY SYSRES_CONST_ACTIVE_VERSION_STATE_PICK_VALUE SYSRES_CONST_ADD_REFERENCE_MODE_NAME SYSRES_CONST_ADDITION_REQUISITE_CODE SYSRES_CONST_ADDITIONAL_PARAMS_REQUISITE_CODE SYSRES_CONST_ADITIONAL_JOB_END_DATE_REQUISITE_NAME SYSRES_CONST_ADITIONAL_JOB_READ_REQUISITE_NAME SYSRES_CONST_ADITIONAL_JOB_START_DATE_REQUISITE_NAME SYSRES_CONST_ADITIONAL_JOB_STATE_REQUISITE_NAME SYSRES_CONST_ADMINISTRATION_HISTORY_ADDING_USER_TO_GROUP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_ADDING_USER_TO_GROUP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_CREATION_COMP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_CREATION_COMP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_CREATION_GROUP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_CREATION_GROUP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_CREATION_USER_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_CREATION_USER_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_DATABASE_USER_CREATION SYSRES_CONST_ADMINISTRATION_HISTORY_DATABASE_USER_CREATION_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_DATABASE_USER_DELETION SYSRES_CONST_ADMINISTRATION_HISTORY_DATABASE_USER_DELETION_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_COMP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_COMP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_GROUP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_GROUP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_USER_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_USER_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_USER_FROM_GROUP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_DELETION_USER_FROM_GROUP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_FILTERER_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_FILTERER_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_FILTERER_RESTRICTION_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_FILTERER_RESTRICTION_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_PRIVILEGE_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_PRIVILEGE_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_RIGHTS_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_GRANTING_RIGHTS_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_IS_MAIN_SERVER_CHANGED_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_IS_MAIN_SERVER_CHANGED_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_IS_PUBLIC_CHANGED_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_IS_PUBLIC_CHANGED_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_FILTERER_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_FILTERER_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_FILTERER_RESTRICTION_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_FILTERER_RESTRICTION_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_PRIVILEGE_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_PRIVILEGE_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_RIGHTS_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_REMOVING_RIGHTS_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_SERVER_LOGIN_CREATION SYSRES_CONST_ADMINISTRATION_HISTORY_SERVER_LOGIN_CREATION_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_SERVER_LOGIN_DELETION SYSRES_CONST_ADMINISTRATION_HISTORY_SERVER_LOGIN_DELETION_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_CATEGORY_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_CATEGORY_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_COMP_TITLE_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_COMP_TITLE_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_FULL_NAME_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_FULL_NAME_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_GROUP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_GROUP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_PARENT_GROUP_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_PARENT_GROUP_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_USER_AUTH_TYPE_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_USER_AUTH_TYPE_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_USER_LOGIN_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_USER_LOGIN_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_USER_STATUS_ACTION SYSRES_CONST_ADMINISTRATION_HISTORY_UPDATING_USER_STATUS_ACTION_CODE SYSRES_CONST_ADMINISTRATION_HISTORY_USER_PASSWORD_CHANGE SYSRES_CONST_ADMINISTRATION_HISTORY_USER_PASSWORD_CHANGE_ACTION SYSRES_CONST_ALL_ACCEPT_CONDITION_RUS SYSRES_CONST_ALL_USERS_GROUP SYSRES_CONST_ALL_USERS_GROUP_NAME SYSRES_CONST_ALL_USERS_SERVER_GROUP_NAME SYSRES_CONST_ALLOWED_ACCESS_TYPE_CODE SYSRES_CONST_ALLOWED_ACCESS_TYPE_NAME SYSRES_CONST_APP_VIEWER_TYPE_REQUISITE_CODE SYSRES_CONST_APPROVING_SIGNATURE_NAME SYSRES_CONST_APPROVING_SIGNATURE_REQUISITE_CODE SYSRES_CONST_ASSISTANT_SUBSTITUE_TYPE SYSRES_CONST_ASSISTANT_SUBSTITUE_TYPE_CODE SYSRES_CONST_ATTACH_TYPE_COMPONENT_TOKEN SYSRES_CONST_ATTACH_TYPE_DOC SYSRES_CONST_ATTACH_TYPE_EDOC SYSRES_CONST_ATTACH_TYPE_FOLDER SYSRES_CONST_ATTACH_TYPE_JOB SYSRES_CONST_ATTACH_TYPE_REFERENCE SYSRES_CONST_ATTACH_TYPE_TASK SYSRES_CONST_AUTH_ENCODED_PASSWORD SYSRES_CONST_AUTH_ENCODED_PASSWORD_CODE SYSRES_CONST_AUTH_NOVELL SYSRES_CONST_AUTH_PASSWORD SYSRES_CONST_AUTH_PASSWORD_CODE SYSRES_CONST_AUTH_WINDOWS SYSRES_CONST_AUTHENTICATING_SIGNATURE_NAME SYSRES_CONST_AUTHENTICATING_SIGNATURE_REQUISITE_CODE SYSRES_CONST_AUTO_ENUM_METHOD_FLAG SYSRES_CONST_AUTO_NUMERATION_CODE SYSRES_CONST_AUTO_STRONG_ENUM_METHOD_FLAG SYSRES_CONST_AUTOTEXT_NAME_REQUISITE_CODE SYSRES_CONST_AUTOTEXT_TEXT_REQUISITE_CODE SYSRES_CONST_AUTOTEXT_USAGE_ALL SYSRES_CONST_AUTOTEXT_USAGE_ALL_CODE SYSRES_CONST_AUTOTEXT_USAGE_SIGN SYSRES_CONST_AUTOTEXT_USAGE_SIGN_CODE SYSRES_CONST_AUTOTEXT_USAGE_WORK SYSRES_CONST_AUTOTEXT_USAGE_WORK_CODE SYSRES_CONST_AUTOTEXT_USE_ANYWHERE_CODE SYSRES_CONST_AUTOTEXT_USE_ON_SIGNING_CODE SYSRES_CONST_AUTOTEXT_USE_ON_WORK_CODE SYSRES_CONST_BEGIN_DATE_REQUISITE_CODE SYSRES_CONST_BLACK_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_BLUE_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_BTN_PART SYSRES_CONST_CALCULATED_ROLE_TYPE_CODE SYSRES_CONST_CALL_TYPE_VARIABLE_BUTTON_VALUE SYSRES_CONST_CALL_TYPE_VARIABLE_PROGRAM_VALUE SYSRES_CONST_CANCEL_MESSAGE_FUNCTION_RESULT SYSRES_CONST_CARD_PART SYSRES_CONST_CARD_REFERENCE_MODE_NAME SYSRES_CONST_CERTIFICATE_TYPE_REQUISITE_ENCRYPT_VALUE SYSRES_CONST_CERTIFICATE_TYPE_REQUISITE_SIGN_AND_ENCRYPT_VALUE SYSRES_CONST_CERTIFICATE_TYPE_REQUISITE_SIGN_VALUE SYSRES_CONST_CHECK_PARAM_VALUE_DATE_PARAM_TYPE SYSRES_CONST_CHECK_PARAM_VALUE_FLOAT_PARAM_TYPE SYSRES_CONST_CHECK_PARAM_VALUE_INTEGER_PARAM_TYPE SYSRES_CONST_CHECK_PARAM_VALUE_PICK_PARAM_TYPE SYSRES_CONST_CHECK_PARAM_VALUE_REEFRENCE_PARAM_TYPE SYSRES_CONST_CLOSED_RECORD_FLAG_VALUE_FEMININE SYSRES_CONST_CLOSED_RECORD_FLAG_VALUE_MASCULINE SYSRES_CONST_CODE_COMPONENT_TYPE_ADMIN SYSRES_CONST_CODE_COMPONENT_TYPE_DEVELOPER SYSRES_CONST_CODE_COMPONENT_TYPE_DOCS SYSRES_CONST_CODE_COMPONENT_TYPE_EDOC_CARDS SYSRES_CONST_CODE_COMPONENT_TYPE_EXTERNAL_EXECUTABLE SYSRES_CONST_CODE_COMPONENT_TYPE_OTHER SYSRES_CONST_CODE_COMPONENT_TYPE_REFERENCE SYSRES_CONST_CODE_COMPONENT_TYPE_REPORT SYSRES_CONST_CODE_COMPONENT_TYPE_SCRIPT SYSRES_CONST_CODE_COMPONENT_TYPE_URL SYSRES_CONST_CODE_REQUISITE_ACCESS SYSRES_CONST_CODE_REQUISITE_CODE SYSRES_CONST_CODE_REQUISITE_COMPONENT SYSRES_CONST_CODE_REQUISITE_DESCRIPTION SYSRES_CONST_CODE_REQUISITE_EXCLUDE_COMPONENT SYSRES_CONST_CODE_REQUISITE_RECORD SYSRES_CONST_COMMENT_REQ_CODE SYSRES_CONST_COMMON_SETTINGS_REQUISITE_CODE SYSRES_CONST_COMP_CODE_GRD SYSRES_CONST_COMPONENT_GROUP_TYPE_REQUISITE_CODE SYSRES_CONST_COMPONENT_TYPE_ADMIN_COMPONENTS SYSRES_CONST_COMPONENT_TYPE_DEVELOPER_COMPONENTS SYSRES_CONST_COMPONENT_TYPE_DOCS SYSRES_CONST_COMPONENT_TYPE_EDOC_CARDS SYSRES_CONST_COMPONENT_TYPE_EDOCS SYSRES_CONST_COMPONENT_TYPE_EXTERNAL_EXECUTABLE SYSRES_CONST_COMPONENT_TYPE_OTHER SYSRES_CONST_COMPONENT_TYPE_REFERENCE_TYPES SYSRES_CONST_COMPONENT_TYPE_REFERENCES SYSRES_CONST_COMPONENT_TYPE_REPORTS SYSRES_CONST_COMPONENT_TYPE_SCRIPTS SYSRES_CONST_COMPONENT_TYPE_URL SYSRES_CONST_COMPONENTS_REMOTE_SERVERS_VIEW_CODE SYSRES_CONST_CONDITION_BLOCK_DESCRIPTION SYSRES_CONST_CONST_FIRM_STATUS_COMMON SYSRES_CONST_CONST_FIRM_STATUS_INDIVIDUAL SYSRES_CONST_CONST_NEGATIVE_VALUE SYSRES_CONST_CONST_POSITIVE_VALUE SYSRES_CONST_CONST_SERVER_STATUS_DONT_REPLICATE SYSRES_CONST_CONST_SERVER_STATUS_REPLICATE SYSRES_CONST_CONTENTS_REQUISITE_CODE SYSRES_CONST_DATA_TYPE_BOOLEAN SYSRES_CONST_DATA_TYPE_DATE SYSRES_CONST_DATA_TYPE_FLOAT SYSRES_CONST_DATA_TYPE_INTEGER SYSRES_CONST_DATA_TYPE_PICK SYSRES_CONST_DATA_TYPE_REFERENCE SYSRES_CONST_DATA_TYPE_STRING SYSRES_CONST_DATA_TYPE_TEXT SYSRES_CONST_DATA_TYPE_VARIANT SYSRES_CONST_DATE_CLOSE_REQ_CODE SYSRES_CONST_DATE_FORMAT_DATE_ONLY_CHAR SYSRES_CONST_DATE_OPEN_REQ_CODE SYSRES_CONST_DATE_REQUISITE SYSRES_CONST_DATE_REQUISITE_CODE SYSRES_CONST_DATE_REQUISITE_NAME SYSRES_CONST_DATE_REQUISITE_TYPE SYSRES_CONST_DATE_TYPE_CHAR SYSRES_CONST_DATETIME_FORMAT_VALUE SYSRES_CONST_DEA_ACCESS_RIGHTS_ACTION_CODE SYSRES_CONST_DESCRIPTION_LOCALIZE_ID_REQUISITE_CODE SYSRES_CONST_DESCRIPTION_REQUISITE_CODE SYSRES_CONST_DET1_PART SYSRES_CONST_DET2_PART SYSRES_CONST_DET3_PART SYSRES_CONST_DET4_PART SYSRES_CONST_DET5_PART SYSRES_CONST_DET6_PART SYSRES_CONST_DETAIL_DATASET_KEY_REQUISITE_CODE SYSRES_CONST_DETAIL_PICK_REQUISITE_CODE SYSRES_CONST_DETAIL_REQ_CODE SYSRES_CONST_DO_NOT_USE_ACCESS_TYPE_CODE SYSRES_CONST_DO_NOT_USE_ACCESS_TYPE_NAME SYSRES_CONST_DO_NOT_USE_ON_VIEW_ACCESS_TYPE_CODE SYSRES_CONST_DO_NOT_USE_ON_VIEW_ACCESS_TYPE_NAME SYSRES_CONST_DOCUMENT_STORAGES_CODE SYSRES_CONST_DOCUMENT_TEMPLATES_TYPE_NAME SYSRES_CONST_DOUBLE_REQUISITE_CODE SYSRES_CONST_EDITOR_CLOSE_FILE_OBSERV_TYPE_CODE SYSRES_CONST_EDITOR_CLOSE_PROCESS_OBSERV_TYPE_CODE SYSRES_CONST_EDITOR_TYPE_REQUISITE_CODE SYSRES_CONST_EDITORS_APPLICATION_NAME_REQUISITE_CODE SYSRES_CONST_EDITORS_CREATE_SEVERAL_PROCESSES_REQUISITE_CODE SYSRES_CONST_EDITORS_EXTENSION_REQUISITE_CODE SYSRES_CONST_EDITORS_OBSERVER_BY_PROCESS_TYPE SYSRES_CONST_EDITORS_REFERENCE_CODE SYSRES_CONST_EDITORS_REPLACE_SPEC_CHARS_REQUISITE_CODE SYSRES_CONST_EDITORS_USE_PLUGINS_REQUISITE_CODE SYSRES_CONST_EDITORS_VIEW_DOCUMENT_OPENED_TO_EDIT_CODE SYSRES_CONST_EDOC_CARD_TYPE_REQUISITE_CODE SYSRES_CONST_EDOC_CARD_TYPES_LINK_REQUISITE_CODE SYSRES_CONST_EDOC_CERTIFICATE_AND_PASSWORD_ENCODE_CODE SYSRES_CONST_EDOC_CERTIFICATE_ENCODE_CODE SYSRES_CONST_EDOC_DATE_REQUISITE_CODE SYSRES_CONST_EDOC_KIND_REFERENCE_CODE SYSRES_CONST_EDOC_KINDS_BY_TEMPLATE_ACTION_CODE SYSRES_CONST_EDOC_MANAGE_ACCESS_CODE SYSRES_CONST_EDOC_NONE_ENCODE_CODE SYSRES_CONST_EDOC_NUMBER_REQUISITE_CODE SYSRES_CONST_EDOC_PASSWORD_ENCODE_CODE SYSRES_CONST_EDOC_READONLY_ACCESS_CODE SYSRES_CONST_EDOC_SHELL_LIFE_TYPE_VIEW_VALUE SYSRES_CONST_EDOC_SIZE_RESTRICTION_PRIORITY_REQUISITE_CODE SYSRES_CONST_EDOC_STORAGE_CHECK_ACCESS_RIGHTS_REQUISITE_CODE SYSRES_CONST_EDOC_STORAGE_COMPUTER_NAME_REQUISITE_CODE SYSRES_CONST_EDOC_STORAGE_DATABASE_NAME_REQUISITE_CODE SYSRES_CONST_EDOC_STORAGE_EDIT_IN_STORAGE_REQUISITE_CODE SYSRES_CONST_EDOC_STORAGE_LOCAL_PATH_REQUISITE_CODE SYSRES_CONST_EDOC_STORAGE_SHARED_SOURCE_NAME_REQUISITE_CODE SYSRES_CONST_EDOC_TEMPLATE_REQUISITE_CODE SYSRES_CONST_EDOC_TYPES_REFERENCE_CODE SYSRES_CONST_EDOC_VERSION_ACTIVE_STAGE_CODE SYSRES_CONST_EDOC_VERSION_DESIGN_STAGE_CODE SYSRES_CONST_EDOC_VERSION_OBSOLETE_STAGE_CODE SYSRES_CONST_EDOC_WRITE_ACCES_CODE SYSRES_CONST_EDOCUMENT_CARD_REQUISITES_REFERENCE_CODE_SELECTED_REQUISITE SYSRES_CONST_ENCODE_CERTIFICATE_TYPE_CODE SYSRES_CONST_END_DATE_REQUISITE_CODE SYSRES_CONST_ENUMERATION_TYPE_REQUISITE_CODE SYSRES_CONST_EXECUTE_ACCESS_RIGHTS_TYPE_CODE SYSRES_CONST_EXECUTIVE_FILE_STORAGE_TYPE SYSRES_CONST_EXIST_CONST SYSRES_CONST_EXIST_VALUE SYSRES_CONST_EXPORT_LOCK_TYPE_ASK SYSRES_CONST_EXPORT_LOCK_TYPE_WITH_LOCK SYSRES_CONST_EXPORT_LOCK_TYPE_WITHOUT_LOCK SYSRES_CONST_EXPORT_VERSION_TYPE_ASK SYSRES_CONST_EXPORT_VERSION_TYPE_LAST SYSRES_CONST_EXPORT_VERSION_TYPE_LAST_ACTIVE SYSRES_CONST_EXTENSION_REQUISITE_CODE SYSRES_CONST_FILTER_NAME_REQUISITE_CODE SYSRES_CONST_FILTER_REQUISITE_CODE SYSRES_CONST_FILTER_TYPE_COMMON_CODE SYSRES_CONST_FILTER_TYPE_COMMON_NAME SYSRES_CONST_FILTER_TYPE_USER_CODE SYSRES_CONST_FILTER_TYPE_USER_NAME SYSRES_CONST_FILTER_VALUE_REQUISITE_NAME SYSRES_CONST_FLOAT_NUMBER_FORMAT_CHAR SYSRES_CONST_FLOAT_REQUISITE_TYPE SYSRES_CONST_FOLDER_AUTHOR_VALUE SYSRES_CONST_FOLDER_KIND_ANY_OBJECTS SYSRES_CONST_FOLDER_KIND_COMPONENTS SYSRES_CONST_FOLDER_KIND_EDOCS SYSRES_CONST_FOLDER_KIND_JOBS SYSRES_CONST_FOLDER_KIND_TASKS SYSRES_CONST_FOLDER_TYPE_COMMON SYSRES_CONST_FOLDER_TYPE_COMPONENT SYSRES_CONST_FOLDER_TYPE_FAVORITES SYSRES_CONST_FOLDER_TYPE_INBOX SYSRES_CONST_FOLDER_TYPE_OUTBOX SYSRES_CONST_FOLDER_TYPE_QUICK_LAUNCH SYSRES_CONST_FOLDER_TYPE_SEARCH SYSRES_CONST_FOLDER_TYPE_SHORTCUTS SYSRES_CONST_FOLDER_TYPE_USER SYSRES_CONST_FROM_DICTIONARY_ENUM_METHOD_FLAG SYSRES_CONST_FULL_SUBSTITUTE_TYPE SYSRES_CONST_FULL_SUBSTITUTE_TYPE_CODE SYSRES_CONST_FUNCTION_CANCEL_RESULT SYSRES_CONST_FUNCTION_CATEGORY_SYSTEM SYSRES_CONST_FUNCTION_CATEGORY_USER SYSRES_CONST_FUNCTION_FAILURE_RESULT SYSRES_CONST_FUNCTION_SAVE_RESULT SYSRES_CONST_GENERATED_REQUISITE SYSRES_CONST_GREEN_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_GROUP_ACCOUNT_TYPE_VALUE_CODE SYSRES_CONST_GROUP_CATEGORY_NORMAL_CODE SYSRES_CONST_GROUP_CATEGORY_NORMAL_NAME SYSRES_CONST_GROUP_CATEGORY_SERVICE_CODE SYSRES_CONST_GROUP_CATEGORY_SERVICE_NAME SYSRES_CONST_GROUP_COMMON_CATEGORY_FIELD_VALUE SYSRES_CONST_GROUP_FULL_NAME_REQUISITE_CODE SYSRES_CONST_GROUP_NAME_REQUISITE_CODE SYSRES_CONST_GROUP_RIGHTS_T_REQUISITE_CODE SYSRES_CONST_GROUP_SERVER_CODES_REQUISITE_CODE SYSRES_CONST_GROUP_SERVER_NAME_REQUISITE_CODE SYSRES_CONST_GROUP_SERVICE_CATEGORY_FIELD_VALUE SYSRES_CONST_GROUP_USER_REQUISITE_CODE SYSRES_CONST_GROUPS_REFERENCE_CODE SYSRES_CONST_GROUPS_REQUISITE_CODE SYSRES_CONST_HIDDEN_MODE_NAME SYSRES_CONST_HIGH_LVL_REQUISITE_CODE SYSRES_CONST_HISTORY_ACTION_CREATE_CODE SYSRES_CONST_HISTORY_ACTION_DELETE_CODE SYSRES_CONST_HISTORY_ACTION_EDIT_CODE SYSRES_CONST_HOUR_CHAR SYSRES_CONST_ID_REQUISITE_CODE SYSRES_CONST_IDSPS_REQUISITE_CODE SYSRES_CONST_IMAGE_MODE_COLOR SYSRES_CONST_IMAGE_MODE_GREYSCALE SYSRES_CONST_IMAGE_MODE_MONOCHROME SYSRES_CONST_IMPORTANCE_HIGH SYSRES_CONST_IMPORTANCE_LOW SYSRES_CONST_IMPORTANCE_NORMAL SYSRES_CONST_IN_DESIGN_VERSION_STATE_PICK_VALUE SYSRES_CONST_INCOMING_WORK_RULE_TYPE_CODE SYSRES_CONST_INT_REQUISITE SYSRES_CONST_INT_REQUISITE_TYPE SYSRES_CONST_INTEGER_NUMBER_FORMAT_CHAR SYSRES_CONST_INTEGER_TYPE_CHAR SYSRES_CONST_IS_GENERATED_REQUISITE_NEGATIVE_VALUE SYSRES_CONST_IS_PUBLIC_ROLE_REQUISITE_CODE SYSRES_CONST_IS_REMOTE_USER_NEGATIVE_VALUE SYSRES_CONST_IS_REMOTE_USER_POSITIVE_VALUE SYSRES_CONST_IS_STORED_REQUISITE_NEGATIVE_VALUE SYSRES_CONST_IS_STORED_REQUISITE_STORED_VALUE SYSRES_CONST_ITALIC_LIFE_CYCLE_STAGE_DRAW_STYLE SYSRES_CONST_JOB_BLOCK_DESCRIPTION SYSRES_CONST_JOB_KIND_CONTROL_JOB SYSRES_CONST_JOB_KIND_JOB SYSRES_CONST_JOB_KIND_NOTICE SYSRES_CONST_JOB_STATE_ABORTED SYSRES_CONST_JOB_STATE_COMPLETE SYSRES_CONST_JOB_STATE_WORKING SYSRES_CONST_KIND_REQUISITE_CODE SYSRES_CONST_KIND_REQUISITE_NAME SYSRES_CONST_KINDS_CREATE_SHADOW_COPIES_REQUISITE_CODE SYSRES_CONST_KINDS_DEFAULT_EDOC_LIFE_STAGE_REQUISITE_CODE SYSRES_CONST_KINDS_EDOC_ALL_TEPLATES_ALLOWED_REQUISITE_CODE SYSRES_CONST_KINDS_EDOC_ALLOW_LIFE_CYCLE_STAGE_CHANGING_REQUISITE_CODE SYSRES_CONST_KINDS_EDOC_ALLOW_MULTIPLE_ACTIVE_VERSIONS_REQUISITE_CODE SYSRES_CONST_KINDS_EDOC_SHARE_ACCES_RIGHTS_BY_DEFAULT_CODE SYSRES_CONST_KINDS_EDOC_TEMPLATE_REQUISITE_CODE SYSRES_CONST_KINDS_EDOC_TYPE_REQUISITE_CODE SYSRES_CONST_KINDS_SIGNERS_REQUISITES_CODE SYSRES_CONST_KOD_INPUT_TYPE SYSRES_CONST_LAST_UPDATE_DATE_REQUISITE_CODE SYSRES_CONST_LIFE_CYCLE_START_STAGE_REQUISITE_CODE SYSRES_CONST_LILAC_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_LINK_OBJECT_KIND_COMPONENT SYSRES_CONST_LINK_OBJECT_KIND_DOCUMENT SYSRES_CONST_LINK_OBJECT_KIND_EDOC SYSRES_CONST_LINK_OBJECT_KIND_FOLDER SYSRES_CONST_LINK_OBJECT_KIND_JOB SYSRES_CONST_LINK_OBJECT_KIND_REFERENCE SYSRES_CONST_LINK_OBJECT_KIND_TASK SYSRES_CONST_LINK_REF_TYPE_REQUISITE_CODE SYSRES_CONST_LIST_REFERENCE_MODE_NAME SYSRES_CONST_LOCALIZATION_DICTIONARY_MAIN_VIEW_CODE SYSRES_CONST_MAIN_VIEW_CODE SYSRES_CONST_MANUAL_ENUM_METHOD_FLAG SYSRES_CONST_MASTER_COMP_TYPE_REQUISITE_CODE SYSRES_CONST_MASTER_TABLE_REC_ID_REQUISITE_CODE SYSRES_CONST_MAXIMIZED_MODE_NAME SYSRES_CONST_ME_VALUE SYSRES_CONST_MESSAGE_ATTENTION_CAPTION SYSRES_CONST_MESSAGE_CONFIRMATION_CAPTION SYSRES_CONST_MESSAGE_ERROR_CAPTION SYSRES_CONST_MESSAGE_INFORMATION_CAPTION SYSRES_CONST_MINIMIZED_MODE_NAME SYSRES_CONST_MINUTE_CHAR SYSRES_CONST_MODULE_REQUISITE_CODE SYSRES_CONST_MONITORING_BLOCK_DESCRIPTION SYSRES_CONST_MONTH_FORMAT_VALUE SYSRES_CONST_NAME_LOCALIZE_ID_REQUISITE_CODE SYSRES_CONST_NAME_REQUISITE_CODE SYSRES_CONST_NAME_SINGULAR_REQUISITE_CODE SYSRES_CONST_NAMEAN_INPUT_TYPE SYSRES_CONST_NEGATIVE_PICK_VALUE SYSRES_CONST_NEGATIVE_VALUE SYSRES_CONST_NO SYSRES_CONST_NO_PICK_VALUE SYSRES_CONST_NO_SIGNATURE_REQUISITE_CODE SYSRES_CONST_NO_VALUE SYSRES_CONST_NONE_ACCESS_RIGHTS_TYPE_CODE SYSRES_CONST_NONOPERATING_RECORD_FLAG_VALUE SYSRES_CONST_NONOPERATING_RECORD_FLAG_VALUE_MASCULINE SYSRES_CONST_NORMAL_ACCESS_RIGHTS_TYPE_CODE SYSRES_CONST_NORMAL_LIFE_CYCLE_STAGE_DRAW_STYLE SYSRES_CONST_NORMAL_MODE_NAME SYSRES_CONST_NOT_ALLOWED_ACCESS_TYPE_CODE SYSRES_CONST_NOT_ALLOWED_ACCESS_TYPE_NAME SYSRES_CONST_NOTE_REQUISITE_CODE SYSRES_CONST_NOTICE_BLOCK_DESCRIPTION SYSRES_CONST_NUM_REQUISITE SYSRES_CONST_NUM_STR_REQUISITE_CODE SYSRES_CONST_NUMERATION_AUTO_NOT_STRONG SYSRES_CONST_NUMERATION_AUTO_STRONG SYSRES_CONST_NUMERATION_FROM_DICTONARY SYSRES_CONST_NUMERATION_MANUAL SYSRES_CONST_NUMERIC_TYPE_CHAR SYSRES_CONST_NUMREQ_REQUISITE_CODE SYSRES_CONST_OBSOLETE_VERSION_STATE_PICK_VALUE SYSRES_CONST_OPERATING_RECORD_FLAG_VALUE SYSRES_CONST_OPERATING_RECORD_FLAG_VALUE_CODE SYSRES_CONST_OPERATING_RECORD_FLAG_VALUE_FEMININE SYSRES_CONST_OPERATING_RECORD_FLAG_VALUE_MASCULINE SYSRES_CONST_OPTIONAL_FORM_COMP_REQCODE_PREFIX SYSRES_CONST_ORANGE_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_ORIGINALREF_REQUISITE_CODE SYSRES_CONST_OURFIRM_REF_CODE SYSRES_CONST_OURFIRM_REQUISITE_CODE SYSRES_CONST_OURFIRM_VAR SYSRES_CONST_OUTGOING_WORK_RULE_TYPE_CODE SYSRES_CONST_PICK_NEGATIVE_RESULT SYSRES_CONST_PICK_POSITIVE_RESULT SYSRES_CONST_PICK_REQUISITE SYSRES_CONST_PICK_REQUISITE_TYPE SYSRES_CONST_PICK_TYPE_CHAR SYSRES_CONST_PLAN_STATUS_REQUISITE_CODE SYSRES_CONST_PLATFORM_VERSION_COMMENT SYSRES_CONST_PLUGINS_SETTINGS_DESCRIPTION_REQUISITE_CODE SYSRES_CONST_POSITIVE_PICK_VALUE SYSRES_CONST_POWER_TO_CREATE_ACTION_CODE SYSRES_CONST_POWER_TO_SIGN_ACTION_CODE SYSRES_CONST_PRIORITY_REQUISITE_CODE SYSRES_CONST_QUALIFIED_TASK_TYPE SYSRES_CONST_QUALIFIED_TASK_TYPE_CODE SYSRES_CONST_RECSTAT_REQUISITE_CODE SYSRES_CONST_RED_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_REF_ID_T_REF_TYPE_REQUISITE_CODE SYSRES_CONST_REF_REQUISITE SYSRES_CONST_REF_REQUISITE_TYPE SYSRES_CONST_REF_REQUISITES_REFERENCE_CODE_SELECTED_REQUISITE SYSRES_CONST_REFERENCE_RECORD_HISTORY_CREATE_ACTION_CODE SYSRES_CONST_REFERENCE_RECORD_HISTORY_DELETE_ACTION_CODE SYSRES_CONST_REFERENCE_RECORD_HISTORY_MODIFY_ACTION_CODE SYSRES_CONST_REFERENCE_TYPE_CHAR SYSRES_CONST_REFERENCE_TYPE_REQUISITE_NAME SYSRES_CONST_REFERENCES_ADD_PARAMS_REQUISITE_CODE SYSRES_CONST_REFERENCES_DISPLAY_REQUISITE_REQUISITE_CODE SYSRES_CONST_REMOTE_SERVER_STATUS_WORKING SYSRES_CONST_REMOTE_SERVER_TYPE_MAIN SYSRES_CONST_REMOTE_SERVER_TYPE_SECONDARY SYSRES_CONST_REMOTE_USER_FLAG_VALUE_CODE SYSRES_CONST_REPORT_APP_EDITOR_INTERNAL SYSRES_CONST_REPORT_BASE_REPORT_ID_REQUISITE_CODE SYSRES_CONST_REPORT_BASE_REPORT_REQUISITE_CODE SYSRES_CONST_REPORT_SCRIPT_REQUISITE_CODE SYSRES_CONST_REPORT_TEMPLATE_REQUISITE_CODE SYSRES_CONST_REPORT_VIEWER_CODE_REQUISITE_CODE SYSRES_CONST_REQ_ALLOW_COMPONENT_DEFAULT_VALUE SYSRES_CONST_REQ_ALLOW_RECORD_DEFAULT_VALUE SYSRES_CONST_REQ_ALLOW_SERVER_COMPONENT_DEFAULT_VALUE SYSRES_CONST_REQ_MODE_AVAILABLE_CODE SYSRES_CONST_REQ_MODE_EDIT_CODE SYSRES_CONST_REQ_MODE_HIDDEN_CODE SYSRES_CONST_REQ_MODE_NOT_AVAILABLE_CODE SYSRES_CONST_REQ_MODE_VIEW_CODE SYSRES_CONST_REQ_NUMBER_REQUISITE_CODE SYSRES_CONST_REQ_SECTION_VALUE SYSRES_CONST_REQ_TYPE_VALUE SYSRES_CONST_REQUISITE_FORMAT_BY_UNIT SYSRES_CONST_REQUISITE_FORMAT_DATE_FULL SYSRES_CONST_REQUISITE_FORMAT_DATE_TIME SYSRES_CONST_REQUISITE_FORMAT_LEFT SYSRES_CONST_REQUISITE_FORMAT_RIGHT SYSRES_CONST_REQUISITE_FORMAT_WITHOUT_UNIT SYSRES_CONST_REQUISITE_NUMBER_REQUISITE_CODE SYSRES_CONST_REQUISITE_SECTION_ACTIONS SYSRES_CONST_REQUISITE_SECTION_BUTTON SYSRES_CONST_REQUISITE_SECTION_BUTTONS SYSRES_CONST_REQUISITE_SECTION_CARD SYSRES_CONST_REQUISITE_SECTION_TABLE SYSRES_CONST_REQUISITE_SECTION_TABLE10 SYSRES_CONST_REQUISITE_SECTION_TABLE11 SYSRES_CONST_REQUISITE_SECTION_TABLE12 SYSRES_CONST_REQUISITE_SECTION_TABLE13 SYSRES_CONST_REQUISITE_SECTION_TABLE14 SYSRES_CONST_REQUISITE_SECTION_TABLE15 SYSRES_CONST_REQUISITE_SECTION_TABLE16 SYSRES_CONST_REQUISITE_SECTION_TABLE17 SYSRES_CONST_REQUISITE_SECTION_TABLE18 SYSRES_CONST_REQUISITE_SECTION_TABLE19 SYSRES_CONST_REQUISITE_SECTION_TABLE2 SYSRES_CONST_REQUISITE_SECTION_TABLE20 SYSRES_CONST_REQUISITE_SECTION_TABLE21 SYSRES_CONST_REQUISITE_SECTION_TABLE22 SYSRES_CONST_REQUISITE_SECTION_TABLE23 SYSRES_CONST_REQUISITE_SECTION_TABLE24 SYSRES_CONST_REQUISITE_SECTION_TABLE3 SYSRES_CONST_REQUISITE_SECTION_TABLE4 SYSRES_CONST_REQUISITE_SECTION_TABLE5 SYSRES_CONST_REQUISITE_SECTION_TABLE6 SYSRES_CONST_REQUISITE_SECTION_TABLE7 SYSRES_CONST_REQUISITE_SECTION_TABLE8 SYSRES_CONST_REQUISITE_SECTION_TABLE9 SYSRES_CONST_REQUISITES_PSEUDOREFERENCE_REQUISITE_NUMBER_REQUISITE_CODE SYSRES_CONST_RIGHT_ALIGNMENT_CODE SYSRES_CONST_ROLES_REFERENCE_CODE SYSRES_CONST_ROUTE_STEP_AFTER_RUS SYSRES_CONST_ROUTE_STEP_AND_CONDITION_RUS SYSRES_CONST_ROUTE_STEP_OR_CONDITION_RUS SYSRES_CONST_ROUTE_TYPE_COMPLEX SYSRES_CONST_ROUTE_TYPE_PARALLEL SYSRES_CONST_ROUTE_TYPE_SERIAL SYSRES_CONST_SBDATASETDESC_NEGATIVE_VALUE SYSRES_CONST_SBDATASETDESC_POSITIVE_VALUE SYSRES_CONST_SBVIEWSDESC_POSITIVE_VALUE SYSRES_CONST_SCRIPT_BLOCK_DESCRIPTION SYSRES_CONST_SEARCH_BY_TEXT_REQUISITE_CODE SYSRES_CONST_SEARCHES_COMPONENT_CONTENT SYSRES_CONST_SEARCHES_CRITERIA_ACTION_NAME SYSRES_CONST_SEARCHES_EDOC_CONTENT SYSRES_CONST_SEARCHES_FOLDER_CONTENT SYSRES_CONST_SEARCHES_JOB_CONTENT SYSRES_CONST_SEARCHES_REFERENCE_CODE SYSRES_CONST_SEARCHES_TASK_CONTENT SYSRES_CONST_SECOND_CHAR SYSRES_CONST_SECTION_REQUISITE_ACTIONS_VALUE SYSRES_CONST_SECTION_REQUISITE_CARD_VALUE SYSRES_CONST_SECTION_REQUISITE_CODE SYSRES_CONST_SECTION_REQUISITE_DETAIL_1_VALUE SYSRES_CONST_SECTION_REQUISITE_DETAIL_2_VALUE SYSRES_CONST_SECTION_REQUISITE_DETAIL_3_VALUE SYSRES_CONST_SECTION_REQUISITE_DETAIL_4_VALUE SYSRES_CONST_SECTION_REQUISITE_DETAIL_5_VALUE SYSRES_CONST_SECTION_REQUISITE_DETAIL_6_VALUE SYSRES_CONST_SELECT_REFERENCE_MODE_NAME SYSRES_CONST_SELECT_TYPE_SELECTABLE SYSRES_CONST_SELECT_TYPE_SELECTABLE_ONLY_CHILD SYSRES_CONST_SELECT_TYPE_SELECTABLE_WITH_CHILD SYSRES_CONST_SELECT_TYPE_UNSLECTABLE SYSRES_CONST_SERVER_TYPE_MAIN SYSRES_CONST_SERVICE_USER_CATEGORY_FIELD_VALUE SYSRES_CONST_SETTINGS_USER_REQUISITE_CODE SYSRES_CONST_SIGNATURE_AND_ENCODE_CERTIFICATE_TYPE_CODE SYSRES_CONST_SIGNATURE_CERTIFICATE_TYPE_CODE SYSRES_CONST_SINGULAR_TITLE_REQUISITE_CODE SYSRES_CONST_SQL_SERVER_AUTHENTIFICATION_FLAG_VALUE_CODE SYSRES_CONST_SQL_SERVER_ENCODE_AUTHENTIFICATION_FLAG_VALUE_CODE SYSRES_CONST_STANDART_ROUTE_REFERENCE_CODE SYSRES_CONST_STANDART_ROUTE_REFERENCE_COMMENT_REQUISITE_CODE SYSRES_CONST_STANDART_ROUTES_GROUPS_REFERENCE_CODE SYSRES_CONST_STATE_REQ_NAME SYSRES_CONST_STATE_REQUISITE_ACTIVE_VALUE SYSRES_CONST_STATE_REQUISITE_CLOSED_VALUE SYSRES_CONST_STATE_REQUISITE_CODE SYSRES_CONST_STATIC_ROLE_TYPE_CODE SYSRES_CONST_STATUS_PLAN_DEFAULT_VALUE SYSRES_CONST_STATUS_VALUE_AUTOCLEANING SYSRES_CONST_STATUS_VALUE_BLUE_SQUARE SYSRES_CONST_STATUS_VALUE_COMPLETE SYSRES_CONST_STATUS_VALUE_GREEN_SQUARE SYSRES_CONST_STATUS_VALUE_ORANGE_SQUARE SYSRES_CONST_STATUS_VALUE_PURPLE_SQUARE SYSRES_CONST_STATUS_VALUE_RED_SQUARE SYSRES_CONST_STATUS_VALUE_SUSPEND SYSRES_CONST_STATUS_VALUE_YELLOW_SQUARE SYSRES_CONST_STDROUTE_SHOW_TO_USERS_REQUISITE_CODE SYSRES_CONST_STORAGE_TYPE_FILE SYSRES_CONST_STORAGE_TYPE_SQL_SERVER SYSRES_CONST_STR_REQUISITE SYSRES_CONST_STRIKEOUT_LIFE_CYCLE_STAGE_DRAW_STYLE SYSRES_CONST_STRING_FORMAT_LEFT_ALIGN_CHAR SYSRES_CONST_STRING_FORMAT_RIGHT_ALIGN_CHAR SYSRES_CONST_STRING_REQUISITE_CODE SYSRES_CONST_STRING_REQUISITE_TYPE SYSRES_CONST_STRING_TYPE_CHAR SYSRES_CONST_SUBSTITUTES_PSEUDOREFERENCE_CODE SYSRES_CONST_SUBTASK_BLOCK_DESCRIPTION SYSRES_CONST_SYSTEM_SETTING_CURRENT_USER_PARAM_VALUE SYSRES_CONST_SYSTEM_SETTING_EMPTY_VALUE_PARAM_VALUE SYSRES_CONST_SYSTEM_VERSION_COMMENT SYSRES_CONST_TASK_ACCESS_TYPE_ALL SYSRES_CONST_TASK_ACCESS_TYPE_ALL_MEMBERS SYSRES_CONST_TASK_ACCESS_TYPE_MANUAL SYSRES_CONST_TASK_ENCODE_TYPE_CERTIFICATION SYSRES_CONST_TASK_ENCODE_TYPE_CERTIFICATION_AND_PASSWORD SYSRES_CONST_TASK_ENCODE_TYPE_NONE SYSRES_CONST_TASK_ENCODE_TYPE_PASSWORD SYSRES_CONST_TASK_ROUTE_ALL_CONDITION SYSRES_CONST_TASK_ROUTE_AND_CONDITION SYSRES_CONST_TASK_ROUTE_OR_CONDITION SYSRES_CONST_TASK_STATE_ABORTED SYSRES_CONST_TASK_STATE_COMPLETE SYSRES_CONST_TASK_STATE_CONTINUED SYSRES_CONST_TASK_STATE_CONTROL SYSRES_CONST_TASK_STATE_INIT SYSRES_CONST_TASK_STATE_WORKING SYSRES_CONST_TASK_TITLE SYSRES_CONST_TASK_TYPES_GROUPS_REFERENCE_CODE SYSRES_CONST_TASK_TYPES_REFERENCE_CODE SYSRES_CONST_TEMPLATES_REFERENCE_CODE SYSRES_CONST_TEST_DATE_REQUISITE_NAME SYSRES_CONST_TEST_DEV_DATABASE_NAME SYSRES_CONST_TEST_DEV_SYSTEM_CODE SYSRES_CONST_TEST_EDMS_DATABASE_NAME SYSRES_CONST_TEST_EDMS_MAIN_CODE SYSRES_CONST_TEST_EDMS_MAIN_DB_NAME SYSRES_CONST_TEST_EDMS_SECOND_CODE SYSRES_CONST_TEST_EDMS_SECOND_DB_NAME SYSRES_CONST_TEST_EDMS_SYSTEM_CODE SYSRES_CONST_TEST_NUMERIC_REQUISITE_NAME SYSRES_CONST_TEXT_REQUISITE SYSRES_CONST_TEXT_REQUISITE_CODE SYSRES_CONST_TEXT_REQUISITE_TYPE SYSRES_CONST_TEXT_TYPE_CHAR SYSRES_CONST_TYPE_CODE_REQUISITE_CODE SYSRES_CONST_TYPE_REQUISITE_CODE SYSRES_CONST_UNDEFINED_LIFE_CYCLE_STAGE_FONT_COLOR SYSRES_CONST_UNITS_SECTION_ID_REQUISITE_CODE SYSRES_CONST_UNITS_SECTION_REQUISITE_CODE SYSRES_CONST_UNOPERATING_RECORD_FLAG_VALUE_CODE SYSRES_CONST_UNSTORED_DATA_REQUISITE_CODE SYSRES_CONST_UNSTORED_DATA_REQUISITE_NAME SYSRES_CONST_USE_ACCESS_TYPE_CODE SYSRES_CONST_USE_ACCESS_TYPE_NAME SYSRES_CONST_USER_ACCOUNT_TYPE_VALUE_CODE SYSRES_CONST_USER_ADDITIONAL_INFORMATION_REQUISITE_CODE SYSRES_CONST_USER_AND_GROUP_ID_FROM_PSEUDOREFERENCE_REQUISITE_CODE SYSRES_CONST_USER_CATEGORY_NORMAL SYSRES_CONST_USER_CERTIFICATE_REQUISITE_CODE SYSRES_CONST_USER_CERTIFICATE_STATE_REQUISITE_CODE SYSRES_CONST_USER_CERTIFICATE_SUBJECT_NAME_REQUISITE_CODE SYSRES_CONST_USER_CERTIFICATE_THUMBPRINT_REQUISITE_CODE SYSRES_CONST_USER_COMMON_CATEGORY SYSRES_CONST_USER_COMMON_CATEGORY_CODE SYSRES_CONST_USER_FULL_NAME_REQUISITE_CODE SYSRES_CONST_USER_GROUP_TYPE_REQUISITE_CODE SYSRES_CONST_USER_LOGIN_REQUISITE_CODE SYSRES_CONST_USER_REMOTE_CONTROLLER_REQUISITE_CODE SYSRES_CONST_USER_REMOTE_SYSTEM_REQUISITE_CODE SYSRES_CONST_USER_RIGHTS_T_REQUISITE_CODE SYSRES_CONST_USER_SERVER_NAME_REQUISITE_CODE SYSRES_CONST_USER_SERVICE_CATEGORY SYSRES_CONST_USER_SERVICE_CATEGORY_CODE SYSRES_CONST_USER_STATUS_ADMINISTRATOR_CODE SYSRES_CONST_USER_STATUS_ADMINISTRATOR_NAME SYSRES_CONST_USER_STATUS_DEVELOPER_CODE SYSRES_CONST_USER_STATUS_DEVELOPER_NAME SYSRES_CONST_USER_STATUS_DISABLED_CODE SYSRES_CONST_USER_STATUS_DISABLED_NAME SYSRES_CONST_USER_STATUS_SYSTEM_DEVELOPER_CODE SYSRES_CONST_USER_STATUS_USER_CODE SYSRES_CONST_USER_STATUS_USER_NAME SYSRES_CONST_USER_STATUS_USER_NAME_DEPRECATED SYSRES_CONST_USER_TYPE_FIELD_VALUE_USER SYSRES_CONST_USER_TYPE_REQUISITE_CODE SYSRES_CONST_USERS_CONTROLLER_REQUISITE_CODE SYSRES_CONST_USERS_IS_MAIN_SERVER_REQUISITE_CODE SYSRES_CONST_USERS_REFERENCE_CODE SYSRES_CONST_USERS_REGISTRATION_CERTIFICATES_ACTION_NAME SYSRES_CONST_USERS_REQUISITE_CODE SYSRES_CONST_USERS_SYSTEM_REQUISITE_CODE SYSRES_CONST_USERS_USER_ACCESS_RIGHTS_TYPR_REQUISITE_CODE SYSRES_CONST_USERS_USER_AUTHENTICATION_REQUISITE_CODE SYSRES_CONST_USERS_USER_COMPONENT_REQUISITE_CODE SYSRES_CONST_USERS_USER_GROUP_REQUISITE_CODE SYSRES_CONST_USERS_VIEW_CERTIFICATES_ACTION_NAME SYSRES_CONST_VIEW_DEFAULT_CODE SYSRES_CONST_VIEW_DEFAULT_NAME SYSRES_CONST_VIEWER_REQUISITE_CODE SYSRES_CONST_WAITING_BLOCK_DESCRIPTION SYSRES_CONST_WIZARD_FORM_LABEL_TEST_STRING SYSRES_CONST_WIZARD_QUERY_PARAM_HEIGHT_ETALON_STRING SYSRES_CONST_WIZARD_REFERENCE_COMMENT_REQUISITE_CODE SYSRES_CONST_WORK_RULES_DESCRIPTION_REQUISITE_CODE SYSRES_CONST_WORK_TIME_CALENDAR_REFERENCE_CODE SYSRES_CONST_WORK_WORKFLOW_HARD_ROUTE_TYPE_VALUE SYSRES_CONST_WORK_WORKFLOW_HARD_ROUTE_TYPE_VALUE_CODE SYSRES_CONST_WORK_WORKFLOW_HARD_ROUTE_TYPE_VALUE_CODE_RUS SYSRES_CONST_WORK_WORKFLOW_SOFT_ROUTE_TYPE_VALUE_CODE_RUS SYSRES_CONST_WORKFLOW_ROUTE_TYPR_HARD SYSRES_CONST_WORKFLOW_ROUTE_TYPR_SOFT SYSRES_CONST_XML_ENCODING SYSRES_CONST_XREC_STAT_REQUISITE_CODE SYSRES_CONST_XRECID_FIELD_NAME SYSRES_CONST_YES SYSRES_CONST_YES_NO_2_REQUISITE_CODE SYSRES_CONST_YES_NO_REQUISITE_CODE SYSRES_CONST_YES_NO_T_REF_TYPE_REQUISITE_CODE SYSRES_CONST_YES_PICK_VALUE SYSRES_CONST_YES_VALUE CR FALSE nil NO_VALUE NULL TAB TRUE YES_VALUE ADMINISTRATORS_GROUP_NAME CUSTOMIZERS_GROUP_NAME DEVELOPERS_GROUP_NAME SERVICE_USERS_GROUP_NAME DECISION_BLOCK_FIRST_OPERAND_PROPERTY DECISION_BLOCK_NAME_PROPERTY DECISION_BLOCK_OPERATION_PROPERTY DECISION_BLOCK_RESULT_TYPE_PROPERTY DECISION_BLOCK_SECOND_OPERAND_PROPERTY ANY_FILE_EXTENTION COMPRESSED_DOCUMENT_EXTENSION EXTENDED_DOCUMENT_EXTENSION SHORT_COMPRESSED_DOCUMENT_EXTENSION SHORT_EXTENDED_DOCUMENT_EXTENSION JOB_BLOCK_ABORT_DEADLINE_PROPERTY JOB_BLOCK_AFTER_FINISH_EVENT JOB_BLOCK_AFTER_QUERY_PARAMETERS_EVENT JOB_BLOCK_ATTACHMENT_PROPERTY JOB_BLOCK_ATTACHMENTS_RIGHTS_GROUP_PROPERTY JOB_BLOCK_ATTACHMENTS_RIGHTS_TYPE_PROPERTY JOB_BLOCK_BEFORE_QUERY_PARAMETERS_EVENT JOB_BLOCK_BEFORE_START_EVENT JOB_BLOCK_CREATED_JOBS_PROPERTY JOB_BLOCK_DEADLINE_PROPERTY JOB_BLOCK_EXECUTION_RESULTS_PROPERTY JOB_BLOCK_IS_PARALLEL_PROPERTY JOB_BLOCK_IS_RELATIVE_ABORT_DEADLINE_PROPERTY JOB_BLOCK_IS_RELATIVE_DEADLINE_PROPERTY JOB_BLOCK_JOB_TEXT_PROPERTY JOB_BLOCK_NAME_PROPERTY JOB_BLOCK_NEED_SIGN_ON_PERFORM_PROPERTY JOB_BLOCK_PERFORMER_PROPERTY JOB_BLOCK_RELATIVE_ABORT_DEADLINE_TYPE_PROPERTY JOB_BLOCK_RELATIVE_DEADLINE_TYPE_PROPERTY JOB_BLOCK_SUBJECT_PROPERTY ENGLISH_LANGUAGE_CODE RUSSIAN_LANGUAGE_CODE smHidden smMaximized smMinimized smNormal wmNo wmYes COMPONENT_TOKEN_LINK_KIND DOCUMENT_LINK_KIND EDOCUMENT_LINK_KIND FOLDER_LINK_KIND JOB_LINK_KIND REFERENCE_LINK_KIND TASK_LINK_KIND COMPONENT_TOKEN_LOCK_TYPE EDOCUMENT_VERSION_LOCK_TYPE MONITOR_BLOCK_AFTER_FINISH_EVENT MONITOR_BLOCK_BEFORE_START_EVENT MONITOR_BLOCK_DEADLINE_PROPERTY MONITOR_BLOCK_INTERVAL_PROPERTY MONITOR_BLOCK_INTERVAL_TYPE_PROPERTY MONITOR_BLOCK_IS_RELATIVE_DEADLINE_PROPERTY MONITOR_BLOCK_NAME_PROPERTY MONITOR_BLOCK_RELATIVE_DEADLINE_TYPE_PROPERTY MONITOR_BLOCK_SEARCH_SCRIPT_PROPERTY NOTICE_BLOCK_AFTER_FINISH_EVENT NOTICE_BLOCK_ATTACHMENT_PROPERTY NOTICE_BLOCK_ATTACHMENTS_RIGHTS_GROUP_PROPERTY NOTICE_BLOCK_ATTACHMENTS_RIGHTS_TYPE_PROPERTY NOTICE_BLOCK_BEFORE_START_EVENT NOTICE_BLOCK_CREATED_NOTICES_PROPERTY NOTICE_BLOCK_DEADLINE_PROPERTY NOTICE_BLOCK_IS_RELATIVE_DEADLINE_PROPERTY NOTICE_BLOCK_NAME_PROPERTY NOTICE_BLOCK_NOTICE_TEXT_PROPERTY NOTICE_BLOCK_PERFORMER_PROPERTY NOTICE_BLOCK_RELATIVE_DEADLINE_TYPE_PROPERTY NOTICE_BLOCK_SUBJECT_PROPERTY dseAfterCancel dseAfterClose dseAfterDelete dseAfterDeleteOutOfTransaction dseAfterInsert dseAfterOpen dseAfterScroll dseAfterUpdate dseAfterUpdateOutOfTransaction dseBeforeCancel dseBeforeClose dseBeforeDelete dseBeforeDetailUpdate dseBeforeInsert dseBeforeOpen dseBeforeUpdate dseOnAnyRequisiteChange dseOnCloseRecord dseOnDeleteError dseOnOpenRecord dseOnPrepareUpdate dseOnUpdateError dseOnUpdateRatifiedRecord dseOnValidDelete dseOnValidUpdate reOnChange reOnChangeValues SELECTION_BEGIN_ROUTE_EVENT SELECTION_END_ROUTE_EVENT CURRENT_PERIOD_IS_REQUIRED PREVIOUS_CARD_TYPE_NAME SHOW_RECORD_PROPERTIES_FORM ACCESS_RIGHTS_SETTING_DIALOG_CODE ADMINISTRATOR_USER_CODE ANALYTIC_REPORT_TYPE asrtHideLocal asrtHideRemote CALCULATED_ROLE_TYPE_CODE COMPONENTS_REFERENCE_DEVELOPER_VIEW_CODE DCTS_TEST_PROTOCOLS_FOLDER_PATH E_EDOC_VERSION_ALREADY_APPROVINGLY_SIGNED E_EDOC_VERSION_ALREADY_APPROVINGLY_SIGNED_BY_USER 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deactivate declare declare_constvalue declare_dimensions declare_fundamental_dimensions declare_fundamental_units declare_qty declare_translated declare_unit_conversion declare_units declare_weights decsym defcon define define_alt_display define_variable defint defmatch defrule defstruct deftaylor degree_sequence del delete deleten delta demo demoivre denom depends derivdegree derivlist describe desolve determinant dfloat dgauss_a dgauss_b dgeev dgemm dgeqrf dgesv dgesvd diag diagmatrix diag_matrix diagmatrixp diameter diff digitcharp dimacs_export dimacs_import dimension dimensionless dimensions dimensions_as_list direct directory discrete_freq disjoin disjointp disolate disp dispcon dispform dispfun dispJordan display disprule dispterms distrib divide divisors divsum dkummer_m dkummer_u dlange dodecahedron_graph dotproduct dotsimp dpart draw draw2d draw3d drawdf draw_file draw_graph dscalar echelon edge_coloring edge_connectivity edges eigens_by_jacobi eigenvalues eigenvectors eighth einstein eivals eivects elapsed_real_time elapsed_run_time ele2comp ele2polynome ele2pui elem elementp elevation_grid elim elim_allbut eliminate eliminate_using ellipse elliptic_e elliptic_ec elliptic_eu elliptic_f elliptic_kc elliptic_pi ematrix empty_graph emptyp endcons entermatrix entertensor entier equal equalp equiv_classes erf erfc erf_generalized erfi errcatch error errormsg errors euler ev eval_string evenp every evolution evolution2d evundiff example exp expand expandwrt expandwrt_factored expint expintegral_chi expintegral_ci expintegral_e expintegral_e1 expintegral_ei expintegral_e_simplify expintegral_li expintegral_shi expintegral_si explicit explose exponentialize express expt exsec extdiff extract_linear_equations extremal_subset ezgcd %f f90 facsum factcomb factor factorfacsum factorial factorout factorsum facts fast_central_elements fast_linsolve fasttimes featurep fernfale fft fib fibtophi fifth filename_merge file_search file_type fillarray findde find_root find_root_abs find_root_error find_root_rel first fix flatten flength float floatnump floor flower_snark flush flush1deriv flushd flushnd flush_output fmin_cobyla forget fortran fourcos fourexpand fourier fourier_elim fourint fourintcos fourintsin foursimp foursin fourth fposition frame_bracket freeof freshline fresnel_c fresnel_s from_adjacency_matrix frucht_graph full_listify fullmap fullmapl fullratsimp fullratsubst fullsetify funcsolve fundamental_dimensions fundamental_units fundef funmake funp fv g0 g1 gamma gamma_greek gamma_incomplete gamma_incomplete_generalized gamma_incomplete_regularized gauss gauss_a gauss_b gaussprob gcd gcdex gcdivide gcfac gcfactor gd generalized_lambert_w genfact gen_laguerre genmatrix gensym geo_amortization geo_annuity_fv geo_annuity_pv geomap geometric geometric_mean geosum get getcurrentdirectory get_edge_weight getenv get_lu_factors get_output_stream_string get_pixel get_plot_option get_tex_environment get_tex_environment_default get_vertex_label gfactor gfactorsum ggf girth global_variances gn gnuplot_close gnuplot_replot gnuplot_reset gnuplot_restart gnuplot_start go Gosper GosperSum gr2d gr3d gradef gramschmidt graph6_decode graph6_encode graph6_export graph6_import graph_center graph_charpoly graph_eigenvalues graph_flow graph_order graph_periphery graph_product graph_size graph_union great_rhombicosidodecahedron_graph great_rhombicuboctahedron_graph grid_graph grind grobner_basis grotzch_graph hamilton_cycle hamilton_path hankel hankel_1 hankel_2 harmonic harmonic_mean hav heawood_graph hermite hessian hgfred hilbertmap hilbert_matrix hipow histogram histogram_description hodge horner hypergeometric i0 i1 %ibes ic1 ic2 ic_convert ichr1 ichr2 icosahedron_graph icosidodecahedron_graph icurvature ident identfor identity idiff idim idummy ieqn %if ifactors iframes ifs igcdex igeodesic_coords ilt image imagpart imetric implicit implicit_derivative implicit_plot indexed_tensor indices induced_subgraph inferencep inference_result infix info_display init_atensor init_ctensor in_neighbors innerproduct inpart inprod inrt integerp integer_partitions integrate intersect intersection intervalp intopois intosum invariant1 invariant2 inverse_fft inverse_jacobi_cd inverse_jacobi_cn inverse_jacobi_cs inverse_jacobi_dc inverse_jacobi_dn inverse_jacobi_ds inverse_jacobi_nc inverse_jacobi_nd inverse_jacobi_ns inverse_jacobi_sc inverse_jacobi_sd inverse_jacobi_sn invert invert_by_adjoint invert_by_lu inv_mod irr is is_biconnected is_bipartite is_connected is_digraph is_edge_in_graph is_graph is_graph_or_digraph ishow is_isomorphic isolate isomorphism is_planar isqrt isreal_p is_sconnected is_tree is_vertex_in_graph items_inference %j j0 j1 jacobi jacobian jacobi_cd jacobi_cn jacobi_cs jacobi_dc jacobi_dn jacobi_ds jacobi_nc jacobi_nd jacobi_ns jacobi_p jacobi_sc jacobi_sd jacobi_sn JF jn join jordan julia julia_set julia_sin %k kdels kdelta kill killcontext kostka kron_delta kronecker_product kummer_m kummer_u kurtosis kurtosis_bernoulli kurtosis_beta kurtosis_binomial kurtosis_chi2 kurtosis_continuous_uniform kurtosis_discrete_uniform kurtosis_exp kurtosis_f kurtosis_gamma kurtosis_general_finite_discrete kurtosis_geometric kurtosis_gumbel kurtosis_hypergeometric kurtosis_laplace kurtosis_logistic kurtosis_lognormal kurtosis_negative_binomial kurtosis_noncentral_chi2 kurtosis_noncentral_student_t kurtosis_normal kurtosis_pareto kurtosis_poisson kurtosis_rayleigh kurtosis_student_t kurtosis_weibull label labels lagrange laguerre lambda lambert_w laplace laplacian_matrix last lbfgs lc2kdt lcharp lc_l lcm lc_u ldefint ldisp ldisplay legendre_p legendre_q leinstein length let letrules letsimp levi_civita lfreeof lgtreillis lhs li liediff limit Lindstedt linear linearinterpol linear_program linear_regression line_graph linsolve listarray list_correlations listify list_matrix_entries list_nc_monomials listoftens listofvars listp lmax lmin load loadfile local locate_matrix_entry log logcontract log_gamma lopow lorentz_gauge lowercasep lpart lratsubst lreduce lriemann lsquares_estimates lsquares_estimates_approximate lsquares_estimates_exact lsquares_mse lsquares_residual_mse lsquares_residuals lsum ltreillis lu_backsub lucas lu_factor %m macroexpand macroexpand1 make_array makebox makefact makegamma make_graph make_level_picture makelist makeOrders make_poly_continent make_poly_country make_polygon make_random_state make_rgb_picture makeset make_string_input_stream make_string_output_stream make_transform mandelbrot mandelbrot_set map mapatom maplist matchdeclare matchfix mat_cond mat_fullunblocker mat_function mathml_display mat_norm matrix matrixmap matrixp matrix_size mattrace mat_trace mat_unblocker max max_clique max_degree max_flow maximize_lp max_independent_set max_matching maybe md5sum mean mean_bernoulli mean_beta mean_binomial mean_chi2 mean_continuous_uniform mean_deviation mean_discrete_uniform mean_exp mean_f mean_gamma mean_general_finite_discrete mean_geometric mean_gumbel mean_hypergeometric mean_laplace mean_logistic mean_lognormal mean_negative_binomial mean_noncentral_chi2 mean_noncentral_student_t mean_normal mean_pareto mean_poisson mean_rayleigh mean_student_t mean_weibull median median_deviation member mesh metricexpandall mgf1_sha1 min min_degree min_edge_cut minfactorial minimalPoly minimize_lp minimum_spanning_tree minor minpack_lsquares minpack_solve min_vertex_cover min_vertex_cut mkdir mnewton mod mode_declare mode_identity ModeMatrix moebius mon2schur mono monomial_dimensions multibernstein_poly multi_display_for_texinfo multi_elem multinomial multinomial_coeff multi_orbit multiplot_mode multi_pui multsym multthru mycielski_graph nary natural_unit nc_degree ncexpt ncharpoly negative_picture neighbors new newcontext newdet new_graph newline newton new_variable next_prime nicedummies niceindices ninth nofix nonarray noncentral_moment nonmetricity nonnegintegerp nonscalarp nonzeroandfreeof notequal nounify nptetrad npv nroots nterms ntermst nthroot nullity nullspace num numbered_boundaries numberp number_to_octets num_distinct_partitions numerval numfactor num_partitions nusum nzeta nzetai nzetar octets_to_number octets_to_oid odd_girth oddp ode2 ode_check odelin oid_to_octets op opena opena_binary openr openr_binary openw openw_binary operatorp opsubst optimize %or orbit orbits ordergreat ordergreatp orderless orderlessp orthogonal_complement orthopoly_recur orthopoly_weight outermap out_neighbors outofpois pade parabolic_cylinder_d parametric parametric_surface parg parGosper parse_string parse_timedate part part2cont partfrac partition partition_set partpol path_digraph path_graph pathname_directory pathname_name pathname_type pdf_bernoulli pdf_beta pdf_binomial pdf_cauchy pdf_chi2 pdf_continuous_uniform pdf_discrete_uniform pdf_exp pdf_f pdf_gamma pdf_general_finite_discrete pdf_geometric pdf_gumbel pdf_hypergeometric pdf_laplace pdf_logistic pdf_lognormal pdf_negative_binomial pdf_noncentral_chi2 pdf_noncentral_student_t pdf_normal pdf_pareto pdf_poisson pdf_rank_sum pdf_rayleigh pdf_signed_rank pdf_student_t pdf_weibull pearson_skewness permanent permut permutation permutations petersen_graph petrov pickapart picture_equalp picturep piechart piechart_description planar_embedding playback plog plot2d plot3d plotdf ploteq plsquares pochhammer points poisdiff poisexpt poisint poismap poisplus poissimp poissubst poistimes poistrim polar polarform polartorect polar_to_xy poly_add poly_buchberger poly_buchberger_criterion poly_colon_ideal poly_content polydecomp poly_depends_p poly_elimination_ideal poly_exact_divide poly_expand poly_expt poly_gcd polygon poly_grobner poly_grobner_equal poly_grobner_member poly_grobner_subsetp poly_ideal_intersection poly_ideal_polysaturation poly_ideal_polysaturation1 poly_ideal_saturation poly_ideal_saturation1 poly_lcm poly_minimization polymod poly_multiply polynome2ele polynomialp poly_normal_form poly_normalize poly_normalize_list poly_polysaturation_extension poly_primitive_part poly_pseudo_divide poly_reduced_grobner poly_reduction poly_saturation_extension poly_s_polynomial poly_subtract polytocompanion pop postfix potential power_mod powerseries powerset prefix prev_prime primep primes principal_components print printf printfile print_graph printpois printprops prodrac product properties propvars psi psubst ptriangularize pui pui2comp pui2ele pui2polynome pui_direct puireduc push put pv qput qrange qty quad_control quad_qag quad_qagi quad_qagp quad_qags quad_qawc quad_qawf quad_qawo quad_qaws quadrilateral quantile quantile_bernoulli quantile_beta quantile_binomial quantile_cauchy quantile_chi2 quantile_continuous_uniform quantile_discrete_uniform quantile_exp quantile_f quantile_gamma quantile_general_finite_discrete quantile_geometric quantile_gumbel quantile_hypergeometric quantile_laplace quantile_logistic quantile_lognormal quantile_negative_binomial quantile_noncentral_chi2 quantile_noncentral_student_t quantile_normal quantile_pareto quantile_poisson quantile_rayleigh quantile_student_t quantile_weibull quartile_skewness quit qunit quotient racah_v racah_w radcan radius random random_bernoulli random_beta random_binomial random_bipartite_graph random_cauchy random_chi2 random_continuous_uniform random_digraph random_discrete_uniform random_exp random_f random_gamma random_general_finite_discrete random_geometric random_graph random_graph1 random_gumbel random_hypergeometric random_laplace random_logistic random_lognormal random_negative_binomial random_network random_noncentral_chi2 random_noncentral_student_t random_normal random_pareto random_permutation random_poisson random_rayleigh random_regular_graph random_student_t random_tournament random_tree random_weibull range rank rat ratcoef ratdenom ratdiff ratdisrep ratexpand ratinterpol rational rationalize ratnumer ratnump ratp ratsimp ratsubst ratvars ratweight read read_array read_binary_array read_binary_list read_binary_matrix readbyte readchar read_hashed_array readline read_list read_matrix read_nested_list readonly read_xpm real_imagpart_to_conjugate realpart realroots rearray rectangle rectform rectform_log_if_constant recttopolar rediff reduce_consts reduce_order region region_boundaries region_boundaries_plus rem remainder remarray rembox remcomps remcon remcoord remfun remfunction remlet remove remove_constvalue remove_dimensions remove_edge remove_fundamental_dimensions remove_fundamental_units remove_plot_option remove_vertex rempart remrule remsym remvalue rename rename_file reset reset_displays residue resolvante resolvante_alternee1 resolvante_bipartite resolvante_diedrale resolvante_klein resolvante_klein3 resolvante_produit_sym resolvante_unitaire resolvante_vierer rest resultant return reveal reverse revert revert2 rgb2level rhs ricci riemann rinvariant risch rk rmdir rncombine romberg room rootscontract round row rowop rowswap rreduce run_testsuite %s save saving scalarp scaled_bessel_i scaled_bessel_i0 scaled_bessel_i1 scalefactors scanmap scatterplot scatterplot_description scene schur2comp sconcat scopy scsimp scurvature sdowncase sec sech second sequal sequalignore set_alt_display setdifference set_draw_defaults set_edge_weight setelmx setequalp setify setp set_partitions set_plot_option set_prompt set_random_state set_tex_environment set_tex_environment_default setunits setup_autoload set_up_dot_simplifications set_vertex_label seventh sexplode sf sha1sum sha256sum shortest_path shortest_weighted_path show showcomps showratvars sierpinskiale sierpinskimap sign signum similaritytransform simp_inequality simplify_sum simplode simpmetderiv simtran sin sinh sinsert sinvertcase sixth skewness skewness_bernoulli skewness_beta skewness_binomial skewness_chi2 skewness_continuous_uniform skewness_discrete_uniform skewness_exp skewness_f skewness_gamma skewness_general_finite_discrete skewness_geometric skewness_gumbel skewness_hypergeometric skewness_laplace skewness_logistic skewness_lognormal skewness_negative_binomial skewness_noncentral_chi2 skewness_noncentral_student_t skewness_normal skewness_pareto skewness_poisson skewness_rayleigh skewness_student_t skewness_weibull slength smake small_rhombicosidodecahedron_graph small_rhombicuboctahedron_graph smax smin smismatch snowmap snub_cube_graph snub_dodecahedron_graph solve solve_rec solve_rec_rat some somrac sort sparse6_decode sparse6_encode sparse6_export sparse6_import specint spherical spherical_bessel_j spherical_bessel_y spherical_hankel1 spherical_hankel2 spherical_harmonic spherical_to_xyz splice split sposition sprint sqfr sqrt sqrtdenest sremove sremovefirst sreverse ssearch ssort sstatus ssubst ssubstfirst staircase standardize standardize_inverse_trig starplot starplot_description status std std1 std_bernoulli std_beta std_binomial std_chi2 std_continuous_uniform std_discrete_uniform std_exp std_f std_gamma std_general_finite_discrete std_geometric std_gumbel std_hypergeometric std_laplace std_logistic std_lognormal std_negative_binomial std_noncentral_chi2 std_noncentral_student_t std_normal std_pareto std_poisson std_rayleigh std_student_t std_weibull stemplot stirling stirling1 stirling2 strim striml strimr string stringout stringp strong_components struve_h struve_l sublis sublist sublist_indices submatrix subsample subset subsetp subst substinpart subst_parallel substpart substring subvar subvarp sum sumcontract summand_to_rec supcase supcontext symbolp symmdifference symmetricp system take_channel take_inference tan tanh taylor taylorinfo taylorp taylor_simplifier taytorat tcl_output tcontract tellrat tellsimp tellsimpafter tentex tenth test_mean test_means_difference test_normality test_proportion test_proportions_difference test_rank_sum test_sign test_signed_rank test_variance test_variance_ratio tex tex1 tex_display texput %th third throw time timedate timer timer_info tldefint tlimit todd_coxeter toeplitz tokens to_lisp topological_sort to_poly to_poly_solve totaldisrep totalfourier totient tpartpol trace tracematrix trace_options transform_sample translate translate_file transpose treefale tree_reduce treillis treinat triangle triangularize trigexpand trigrat trigreduce trigsimp trunc truncate truncated_cube_graph truncated_dodecahedron_graph truncated_icosahedron_graph truncated_tetrahedron_graph tr_warnings_get tube tutte_graph ueivects uforget ultraspherical underlying_graph undiff union unique uniteigenvectors unitp units unit_step unitvector unorder unsum untellrat untimer untrace uppercasep uricci uriemann uvect vandermonde_matrix var var1 var_bernoulli var_beta var_binomial var_chi2 var_continuous_uniform var_discrete_uniform var_exp var_f var_gamma var_general_finite_discrete var_geometric var_gumbel var_hypergeometric var_laplace var_logistic var_lognormal var_negative_binomial var_noncentral_chi2 var_noncentral_student_t var_normal var_pareto var_poisson var_rayleigh var_student_t var_weibull vector vectorpotential vectorsimp verbify vers vertex_coloring vertex_connectivity vertex_degree vertex_distance vertex_eccentricity vertex_in_degree vertex_out_degree vertices vertices_to_cycle vertices_to_path %w weyl wheel_graph wiener_index wigner_3j wigner_6j wigner_9j with_stdout write_binary_data writebyte write_data writefile wronskian xreduce xthru %y Zeilberger zeroequiv zerofor zeromatrix zeromatrixp zeta zgeev zheev zlange zn_add_table zn_carmichael_lambda zn_characteristic_factors zn_determinant zn_factor_generators zn_invert_by_lu zn_log zn_mult_table absboxchar activecontexts adapt_depth additive adim aform algebraic algepsilon algexact aliases allbut all_dotsimp_denoms allocation allsym alphabetic animation antisymmetric arrays askexp assume_pos assume_pos_pred assumescalar asymbol atomgrad atrig1 axes axis_3d axis_bottom axis_left axis_right axis_top azimuth background background_color backsubst berlefact bernstein_explicit besselexpand 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erf_representation errormsg error_size error_syms error_type %e_to_numlog eval even evenfun evflag evfun ev_point expandwrt_denom expintexpand expintrep expon expop exptdispflag exptisolate exptsubst facexpand facsum_combine factlim factorflag factorial_expand factors_only fb feature features file_name file_output_append file_search_demo file_search_lisp file_search_maxima|10 file_search_tests file_search_usage file_type_lisp file_type_maxima|10 fill_color fill_density filled_func fixed_vertices flipflag float2bf font font_size fortindent fortspaces fpprec fpprintprec functions gamma_expand gammalim gdet genindex gensumnum GGFCFMAX GGFINFINITY globalsolve gnuplot_command gnuplot_curve_styles gnuplot_curve_titles gnuplot_default_term_command gnuplot_dumb_term_command gnuplot_file_args gnuplot_file_name gnuplot_out_file gnuplot_pdf_term_command gnuplot_pm3d gnuplot_png_term_command gnuplot_postamble gnuplot_preamble gnuplot_ps_term_command gnuplot_svg_term_command gnuplot_term gnuplot_view_args Gosper_in_Zeilberger gradefs grid grid2d grind halfangles head_angle head_both head_length head_type height hypergeometric_representation %iargs ibase icc1 icc2 icounter idummyx ieqnprint ifb ifc1 ifc2 ifg ifgi ifr iframe_bracket_form ifri igeowedge_flag ikt1 ikt2 imaginary inchar increasing infeval infinity inflag infolists inm inmc1 inmc2 intanalysis integer integervalued integrate_use_rootsof integration_constant integration_constant_counter interpolate_color intfaclim ip_grid ip_grid_in irrational isolate_wrt_times iterations itr julia_parameter %k1 %k2 keepfloat key key_pos kinvariant kt label label_alignment label_orientation labels lassociative lbfgs_ncorrections lbfgs_nfeval_max leftjust legend letrat let_rule_packages lfg lg lhospitallim limsubst linear linear_solver linechar linel|10 linenum line_type linewidth line_width linsolve_params linsolvewarn lispdisp listarith listconstvars listdummyvars lmxchar load_pathname loadprint logabs logarc logcb 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diff --git a/_freeze/site_libs/revealjs/plugin/highlight/monokai.css b/_freeze/site_libs/revealjs/plugin/highlight/monokai.css
@@ -0,0 +1,71 @@
+/*
+Monokai style - ported by Luigi Maselli - http://grigio.org
+*/
+
+.hljs {
+ display: block;
+ overflow-x: auto;
+ padding: 0.5em;
+ background: #272822;
+ color: #ddd;
+}
+
+.hljs-tag,
+.hljs-keyword,
+.hljs-selector-tag,
+.hljs-literal,
+.hljs-strong,
+.hljs-name {
+ color: #f92672;
+}
+
+.hljs-code {
+ color: #66d9ef;
+}
+
+.hljs-class .hljs-title {
+ color: white;
+}
+
+.hljs-attribute,
+.hljs-symbol,
+.hljs-regexp,
+.hljs-link {
+ color: #bf79db;
+}
+
+.hljs-string,
+.hljs-bullet,
+.hljs-subst,
+.hljs-title,
+.hljs-section,
+.hljs-emphasis,
+.hljs-type,
+.hljs-built_in,
+.hljs-builtin-name,
+.hljs-selector-attr,
+.hljs-selector-pseudo,
+.hljs-addition,
+.hljs-variable,
+.hljs-template-tag,
+.hljs-template-variable {
+ color: #a6e22e;
+}
+
+.hljs-comment,
+.hljs-quote,
+.hljs-deletion,
+.hljs-meta {
+ color: #75715e;
+}
+
+.hljs-keyword,
+.hljs-selector-tag,
+.hljs-literal,
+.hljs-doctag,
+.hljs-title,
+.hljs-section,
+.hljs-type,
+.hljs-selector-id {
+ font-weight: bold;
+}
diff --git a/_freeze/site_libs/revealjs/plugin/highlight/plugin.js b/_freeze/site_libs/revealjs/plugin/highlight/plugin.js
@@ -0,0 +1,439 @@
+import hljs from 'highlight.js';
+
+/* highlightjs-line-numbers.js 2.8.0 | (C) 2018 Yauheni Pakala | MIT License | github.com/wcoder/highlightjs-line-numbers.js */
+!function(r,o){"use strict";var e,i="hljs-ln",l="hljs-ln-line",h="hljs-ln-code",s="hljs-ln-numbers",c="hljs-ln-n",m="data-line-number",a=/\r\n|\r|\n/g;function u(e){for(var n=e.toString(),t=e.anchorNode;"TD"!==t.nodeName;)t=t.parentNode;for(var r=e.focusNode;"TD"!==r.nodeName;)r=r.parentNode;var o=parseInt(t.dataset.lineNumber),a=parseInt(r.dataset.lineNumber);if(o==a)return n;var i,l=t.textContent,s=r.textContent;for(a<o&&(i=o,o=a,a=i,i=l,l=s,s=i);0!==n.indexOf(l);)l=l.slice(1);for(;-1===n.lastIndexOf(s);)s=s.slice(0,-1);for(var c=l,u=function(e){for(var n=e;"TABLE"!==n.nodeName;)n=n.parentNode;return n}(t),d=o+1;d<a;++d){var f=p('.{0}[{1}="{2}"]',[h,m,d]);c+="\n"+u.querySelector(f).textContent}return c+="\n"+s}function n(e){try{var n=o.querySelectorAll("code.hljs,code.nohighlight");for(var t in n)n.hasOwnProperty(t)&&(n[t].classList.contains("nohljsln")||d(n[t],e))}catch(e){r.console.error("LineNumbers error: ",e)}}function d(e,n){if("object"==typeof e)e.innerHTML=f(e,n)}function f(e,n){var t,r,o=(t=e,{singleLine:function(e){return!!e.singleLine&&e.singleLine}(r=(r=n)||{}),startFrom:function(e,n){var t=1;isFinite(n.startFrom)&&(t=n.startFrom);var r=function(e,n){return e.hasAttribute(n)?e.getAttribute(n):null}(e,"data-ln-start-from");return null!==r&&(t=function(e,n){if(!e)return n;var t=Number(e);return isFinite(t)?t:n}(r,1)),t}(t,r)});return function e(n){var t=n.childNodes;for(var r in t){var o;t.hasOwnProperty(r)&&(o=t[r],0<(o.textContent.trim().match(a)||[]).length&&(0<o.childNodes.length?e(o):v(o.parentNode)))}}(e),function(e,n){var t=g(e);""===t[t.length-1].trim()&&t.pop();if(1<t.length||n.singleLine){for(var r="",o=0,a=t.length;o<a;o++)r+=p('<tr><td class="{0} {1}" {3}="{5}"><div class="{2}" {3}="{5}"></div></td><td class="{0} {4}" {3}="{5}">{6}</td></tr>',[l,s,c,m,h,o+n.startFrom,0<t[o].length?t[o]:" "]);return p('<table class="{0}">{1}</table>',[i,r])}return e}(e.innerHTML,o)}function v(e){var n=e.className;if(/hljs-/.test(n)){for(var t=g(e.innerHTML),r=0,o="";r<t.length;r++){o+=p('<span class="{0}">{1}</span>\n',[n,0<t[r].length?t[r]:" "])}e.innerHTML=o.trim()}}function g(e){return 0===e.length?[]:e.split(a)}function p(e,t){return e.replace(/\{(\d+)\}/g,function(e,n){return void 0!==t[n]?t[n]:e})}hljs?(hljs.initLineNumbersOnLoad=function(e){"interactive"===o.readyState||"complete"===o.readyState?n(e):r.addEventListener("DOMContentLoaded",function(){n(e)})},hljs.lineNumbersBlock=d,hljs.lineNumbersValue=function(e,n){if("string"!=typeof e)return;var t=document.createElement("code");return t.innerHTML=e,f(t,n)},(e=o.createElement("style")).type="text/css",e.innerHTML=p(".{0}{border-collapse:collapse}.{0} td{padding:0}.{1}:before{content:attr({2})}",[i,c,m]),o.getElementsByTagName("head")[0].appendChild(e)):r.console.error("highlight.js not detected!"),document.addEventListener("copy",function(e){var n,t=window.getSelection();!function(e){for(var n=e;n;){if(n.className&&-1!==n.className.indexOf("hljs-ln-code"))return 1;n=n.parentNode}}(t.anchorNode)||(n=-1!==window.navigator.userAgent.indexOf("Edge")?u(t):t.toString(),e.clipboardData.setData("text/plain",n),e.preventDefault())})}(window,document);
+
+
+/*!
+ * reveal.js plugin that adds syntax highlight support.
+ */
+
+const Plugin = {
+
+ id: 'highlight',
+
+ HIGHLIGHT_STEP_DELIMITER: '|',
+ HIGHLIGHT_LINE_DELIMITER: ',',
+ HIGHLIGHT_LINE_RANGE_DELIMITER: '-',
+
+ hljs,
+
+ /**
+ * Highlights code blocks within the given deck.
+ *
+ * Note that this can be called multiple times if
+ * there are multiple presentations on one page.
+ *
+ * @param {Reveal} reveal the reveal.js instance
+ */
+ init: function( reveal ) {
+
+ // Read the plugin config options and provide fallbacks
+ let config = reveal.getConfig().highlight || {};
+
+ config.highlightOnLoad = typeof config.highlightOnLoad === 'boolean' ? config.highlightOnLoad : true;
+ config.escapeHTML = typeof config.escapeHTML === 'boolean' ? config.escapeHTML : true;
+
+ Array.from( reveal.getRevealElement().querySelectorAll( 'pre code' ) ).forEach( block => {
+
+ block.parentNode.classList.add('code-wrapper');
+
+ // Code can optionally be wrapped in script template to avoid
+ // HTML being parsed by the browser (i.e. when you need to
+ // include <, > or & in your code).
+ let substitute = block.querySelector( 'script[type="text/template"]' );
+ if( substitute ) {
+ // textContent handles the HTML entity escapes for us
+ block.textContent = substitute.innerHTML;
+ }
+
+ // Trim whitespace if the "data-trim" attribute is present
+ if( block.hasAttribute( 'data-trim' ) && typeof block.innerHTML.trim === 'function' ) {
+ block.innerHTML = betterTrim( block );
+ }
+
+ // Escape HTML tags unless the "data-noescape" attrbute is present
+ if( config.escapeHTML && !block.hasAttribute( 'data-noescape' )) {
+ block.innerHTML = block.innerHTML.replace( /</g,"<").replace(/>/g, '>' );
+ }
+
+ // Re-highlight when focus is lost (for contenteditable code)
+ block.addEventListener( 'focusout', function( event ) {
+ hljs.highlightElement( event.currentTarget );
+ }, false );
+
+ } );
+
+ // Triggers a callback function before we trigger highlighting
+ if( typeof config.beforeHighlight === 'function' ) {
+ config.beforeHighlight( hljs );
+ }
+
+ // Run initial highlighting for all code
+ if( config.highlightOnLoad ) {
+ Array.from( reveal.getRevealElement().querySelectorAll( 'pre code' ) ).forEach( block => {
+ Plugin.highlightBlock( block );
+ } );
+ }
+
+ // If we're printing to PDF, scroll the code highlights of
+ // all blocks in the deck into view at once
+ reveal.on( 'pdf-ready', function() {
+ [].slice.call( reveal.getRevealElement().querySelectorAll( 'pre code[data-line-numbers].current-fragment' ) ).forEach( function( block ) {
+ Plugin.scrollHighlightedLineIntoView( block, {}, true );
+ } );
+ } );
+
+ },
+
+ /**
+ * Highlights a code block. If the <code> node has the
+ * 'data-line-numbers' attribute we also generate slide
+ * numbers.
+ *
+ * If the block contains multiple line highlight steps,
+ * we clone the block and create a fragment for each step.
+ */
+ highlightBlock: function( block ) {
+
+ hljs.highlightElement( block );
+
+ // Don't generate line numbers for empty code blocks
+ if( block.innerHTML.trim().length === 0 ) return;
+
+ if( block.hasAttribute( 'data-line-numbers' ) ) {
+ hljs.lineNumbersBlock( block, { singleLine: true } );
+
+ var scrollState = { currentBlock: block };
+
+ // If there is more than one highlight step, generate
+ // fragments
+ var highlightSteps = Plugin.deserializeHighlightSteps( block.getAttribute( 'data-line-numbers' ) );
+ if( highlightSteps.length > 1 ) {
+
+ // If the original code block has a fragment-index,
+ // each clone should follow in an incremental sequence
+ var fragmentIndex = parseInt( block.getAttribute( 'data-fragment-index' ), 10 );
+
+ if( typeof fragmentIndex !== 'number' || isNaN( fragmentIndex ) ) {
+ fragmentIndex = null;
+ }
+
+ // Generate fragments for all steps except the original block
+ highlightSteps.slice(1).forEach( function( highlight ) {
+
+ var fragmentBlock = block.cloneNode( true );
+ fragmentBlock.setAttribute( 'data-line-numbers', Plugin.serializeHighlightSteps( [ highlight ] ) );
+ fragmentBlock.classList.add( 'fragment' );
+ block.parentNode.appendChild( fragmentBlock );
+ Plugin.highlightLines( fragmentBlock );
+
+ if( typeof fragmentIndex === 'number' ) {
+ fragmentBlock.setAttribute( 'data-fragment-index', fragmentIndex );
+ fragmentIndex += 1;
+ }
+ else {
+ fragmentBlock.removeAttribute( 'data-fragment-index' );
+ }
+
+ // Scroll highlights into view as we step through them
+ fragmentBlock.addEventListener( 'visible', Plugin.scrollHighlightedLineIntoView.bind( Plugin, fragmentBlock, scrollState ) );
+ fragmentBlock.addEventListener( 'hidden', Plugin.scrollHighlightedLineIntoView.bind( Plugin, fragmentBlock.previousElementSibling, scrollState ) );
+
+ } );
+
+ block.removeAttribute( 'data-fragment-index' );
+ block.setAttribute( 'data-line-numbers', Plugin.serializeHighlightSteps( [ highlightSteps[0] ] ) );
+
+ }
+
+ // Scroll the first highlight into view when the slide
+ // becomes visible. Note supported in IE11 since it lacks
+ // support for Element.closest.
+ var slide = typeof block.closest === 'function' ? block.closest( 'section:not(.stack)' ) : null;
+ if( slide ) {
+ var scrollFirstHighlightIntoView = function() {
+ Plugin.scrollHighlightedLineIntoView( block, scrollState, true );
+ slide.removeEventListener( 'visible', scrollFirstHighlightIntoView );
+ }
+ slide.addEventListener( 'visible', scrollFirstHighlightIntoView );
+ }
+
+ Plugin.highlightLines( block );
+
+ }
+
+ },
+
+ /**
+ * Animates scrolling to the first highlighted line
+ * in the given code block.
+ */
+ scrollHighlightedLineIntoView: function( block, scrollState, skipAnimation ) {
+
+ cancelAnimationFrame( scrollState.animationFrameID );
+
+ // Match the scroll position of the currently visible
+ // code block
+ if( scrollState.currentBlock ) {
+ block.scrollTop = scrollState.currentBlock.scrollTop;
+ }
+
+ // Remember the current code block so that we can match
+ // its scroll position when showing/hiding fragments
+ scrollState.currentBlock = block;
+
+ var highlightBounds = this.getHighlightedLineBounds( block )
+ var viewportHeight = block.offsetHeight;
+
+ // Subtract padding from the viewport height
+ var blockStyles = getComputedStyle( block );
+ viewportHeight -= parseInt( blockStyles.paddingTop ) + parseInt( blockStyles.paddingBottom );
+
+ // Scroll position which centers all highlights
+ var startTop = block.scrollTop;
+ var targetTop = highlightBounds.top + ( Math.min( highlightBounds.bottom - highlightBounds.top, viewportHeight ) - viewportHeight ) / 2;
+
+ // Account for offsets in position applied to the
+ // <table> that holds our lines of code
+ var lineTable = block.querySelector( '.hljs-ln' );
+ if( lineTable ) targetTop += lineTable.offsetTop - parseInt( blockStyles.paddingTop );
+
+ // Make sure the scroll target is within bounds
+ targetTop = Math.max( Math.min( targetTop, block.scrollHeight - viewportHeight ), 0 );
+
+ if( skipAnimation === true || startTop === targetTop ) {
+ block.scrollTop = targetTop;
+ }
+ else {
+
+ // Don't attempt to scroll if there is no overflow
+ if( block.scrollHeight <= viewportHeight ) return;
+
+ var time = 0;
+ var animate = function() {
+ time = Math.min( time + 0.02, 1 );
+
+ // Update our eased scroll position
+ block.scrollTop = startTop + ( targetTop - startTop ) * Plugin.easeInOutQuart( time );
+
+ // Keep animating unless we've reached the end
+ if( time < 1 ) {
+ scrollState.animationFrameID = requestAnimationFrame( animate );
+ }
+ };
+
+ animate();
+
+ }
+
+ },
+
+ /**
+ * The easing function used when scrolling.
+ */
+ easeInOutQuart: function( t ) {
+
+ // easeInOutQuart
+ return t<.5 ? 8*t*t*t*t : 1-8*(--t)*t*t*t;
+
+ },
+
+ getHighlightedLineBounds: function( block ) {
+
+ var highlightedLines = block.querySelectorAll( '.highlight-line' );
+ if( highlightedLines.length === 0 ) {
+ return { top: 0, bottom: 0 };
+ }
+ else {
+ var firstHighlight = highlightedLines[0];
+ var lastHighlight = highlightedLines[ highlightedLines.length -1 ];
+
+ return {
+ top: firstHighlight.offsetTop,
+ bottom: lastHighlight.offsetTop + lastHighlight.offsetHeight
+ }
+ }
+
+ },
+
+ /**
+ * Visually emphasize specific lines within a code block.
+ * This only works on blocks with line numbering turned on.
+ *
+ * @param {HTMLElement} block a <code> block
+ * @param {String} [linesToHighlight] The lines that should be
+ * highlighted in this format:
+ * "1" = highlights line 1
+ * "2,5" = highlights lines 2 & 5
+ * "2,5-7" = highlights lines 2, 5, 6 & 7
+ */
+ highlightLines: function( block, linesToHighlight ) {
+
+ var highlightSteps = Plugin.deserializeHighlightSteps( linesToHighlight || block.getAttribute( 'data-line-numbers' ) );
+
+ if( highlightSteps.length ) {
+
+ highlightSteps[0].forEach( function( highlight ) {
+
+ var elementsToHighlight = [];
+
+ // Highlight a range
+ if( typeof highlight.end === 'number' ) {
+ elementsToHighlight = [].slice.call( block.querySelectorAll( 'table tr:nth-child(n+'+highlight.start+'):nth-child(-n+'+highlight.end+')' ) );
+ }
+ // Highlight a single line
+ else if( typeof highlight.start === 'number' ) {
+ elementsToHighlight = [].slice.call( block.querySelectorAll( 'table tr:nth-child('+highlight.start+')' ) );
+ }
+
+ if( elementsToHighlight.length ) {
+ elementsToHighlight.forEach( function( lineElement ) {
+ lineElement.classList.add( 'highlight-line' );
+ } );
+
+ block.classList.add( 'has-highlights' );
+ }
+
+ } );
+
+ }
+
+ },
+
+ /**
+ * Parses and formats a user-defined string of line
+ * numbers to highlight.
+ *
+ * @example
+ * Plugin.deserializeHighlightSteps( '1,2|3,5-10' )
+ * // [
+ * // [ { start: 1 }, { start: 2 } ],
+ * // [ { start: 3 }, { start: 5, end: 10 } ]
+ * // ]
+ */
+ deserializeHighlightSteps: function( highlightSteps ) {
+
+ // Remove whitespace
+ highlightSteps = highlightSteps.replace( /\s/g, '' );
+
+ // Divide up our line number groups
+ highlightSteps = highlightSteps.split( Plugin.HIGHLIGHT_STEP_DELIMITER );
+
+ return highlightSteps.map( function( highlights ) {
+
+ return highlights.split( Plugin.HIGHLIGHT_LINE_DELIMITER ).map( function( highlight ) {
+
+ // Parse valid line numbers
+ if( /^[\d-]+$/.test( highlight ) ) {
+
+ highlight = highlight.split( Plugin.HIGHLIGHT_LINE_RANGE_DELIMITER );
+
+ var lineStart = parseInt( highlight[0], 10 ),
+ lineEnd = parseInt( highlight[1], 10 );
+
+ if( isNaN( lineEnd ) ) {
+ return {
+ start: lineStart
+ };
+ }
+ else {
+ return {
+ start: lineStart,
+ end: lineEnd
+ };
+ }
+
+ }
+ // If no line numbers are provided, no code will be highlighted
+ else {
+
+ return {};
+
+ }
+
+ } );
+
+ } );
+
+ },
+
+ /**
+ * Serializes parsed line number data into a string so
+ * that we can store it in the DOM.
+ */
+ serializeHighlightSteps: function( highlightSteps ) {
+
+ return highlightSteps.map( function( highlights ) {
+
+ return highlights.map( function( highlight ) {
+
+ // Line range
+ if( typeof highlight.end === 'number' ) {
+ return highlight.start + Plugin.HIGHLIGHT_LINE_RANGE_DELIMITER + highlight.end;
+ }
+ // Single line
+ else if( typeof highlight.start === 'number' ) {
+ return highlight.start;
+ }
+ // All lines
+ else {
+ return '';
+ }
+
+ } ).join( Plugin.HIGHLIGHT_LINE_DELIMITER );
+
+ } ).join( Plugin.HIGHLIGHT_STEP_DELIMITER );
+
+ }
+
+}
+
+// Function to perform a better "data-trim" on code snippets
+// Will slice an indentation amount on each line of the snippet (amount based on the line having the lowest indentation length)
+function betterTrim(snippetEl) {
+ // Helper functions
+ function trimLeft(val) {
+ // Adapted from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/Trim#Polyfill
+ return val.replace(/^[\s\uFEFF\xA0]+/g, '');
+ }
+ function trimLineBreaks(input) {
+ var lines = input.split('\n');
+
+ // Trim line-breaks from the beginning
+ for (var i = 0; i < lines.length; i++) {
+ if (lines[i].trim() === '') {
+ lines.splice(i--, 1);
+ } else break;
+ }
+
+ // Trim line-breaks from the end
+ for (var i = lines.length-1; i >= 0; i--) {
+ if (lines[i].trim() === '') {
+ lines.splice(i, 1);
+ } else break;
+ }
+
+ return lines.join('\n');
+ }
+
+ // Main function for betterTrim()
+ return (function(snippetEl) {
+ var content = trimLineBreaks(snippetEl.innerHTML);
+ var lines = content.split('\n');
+ // Calculate the minimum amount to remove on each line start of the snippet (can be 0)
+ var pad = lines.reduce(function(acc, line) {
+ if (line.length > 0 && trimLeft(line).length > 0 && acc > line.length - trimLeft(line).length) {
+ return line.length - trimLeft(line).length;
+ }
+ return acc;
+ }, Number.POSITIVE_INFINITY);
+ // Slice each line with this amount
+ return lines.map(function(line, index) {
+ return line.slice(pad);
+ })
+ .join('\n');
+ })(snippetEl);
+}
+
+export default () => Plugin;
diff --git a/_freeze/site_libs/revealjs/plugin/highlight/zenburn.css b/_freeze/site_libs/revealjs/plugin/highlight/zenburn.css
@@ -0,0 +1,80 @@
+/*
+
+Zenburn style from voldmar.ru (c) Vladimir Epifanov <voldmar@voldmar.ru>
+based on dark.css by Ivan Sagalaev
+
+*/
+
+.hljs {
+ display: block;
+ overflow-x: auto;
+ padding: 0.5em;
+ background: #3f3f3f;
+ color: #dcdcdc;
+}
+
+.hljs-keyword,
+.hljs-selector-tag,
+.hljs-tag {
+ color: #e3ceab;
+}
+
+.hljs-template-tag {
+ color: #dcdcdc;
+}
+
+.hljs-number {
+ color: #8cd0d3;
+}
+
+.hljs-variable,
+.hljs-template-variable,
+.hljs-attribute {
+ color: #efdcbc;
+}
+
+.hljs-literal {
+ color: #efefaf;
+}
+
+.hljs-subst {
+ color: #8f8f8f;
+}
+
+.hljs-title,
+.hljs-name,
+.hljs-selector-id,
+.hljs-selector-class,
+.hljs-section,
+.hljs-type {
+ color: #efef8f;
+}
+
+.hljs-symbol,
+.hljs-bullet,
+.hljs-link {
+ color: #dca3a3;
+}
+
+.hljs-deletion,
+.hljs-string,
+.hljs-built_in,
+.hljs-builtin-name {
+ color: #cc9393;
+}
+
+.hljs-addition,
+.hljs-comment,
+.hljs-quote,
+.hljs-meta {
+ color: #7f9f7f;
+}
+
+
+.hljs-emphasis {
+ font-style: italic;
+}
+
+.hljs-strong {
+ font-weight: bold;
+}
diff --git a/_freeze/site_libs/revealjs/plugin/markdown/markdown.esm.js b/_freeze/site_libs/revealjs/plugin/markdown/markdown.esm.js
@@ -0,0 +1,7 @@
+function e(){return{async:!1,baseUrl:null,breaks:!1,extensions:null,gfm:!0,headerIds:!0,headerPrefix:"",highlight:null,hooks:null,langPrefix:"language-",mangle:!0,pedantic:!1,renderer:null,sanitize:!1,sanitizer:null,silent:!1,smartypants:!1,tokenizer:null,walkTokens:null,xhtml:!1}}let t={async:!1,baseUrl:null,breaks:!1,extensions:null,gfm:!0,headerIds:!0,headerPrefix:"",highlight:null,hooks:null,langPrefix:"language-",mangle:!0,pedantic:!1,renderer:null,sanitize:!1,sanitizer:null,silent:!1,smartypants:!1,tokenizer:null,walkTokens:null,xhtml:!1};const n=/[&<>"']/,s=new RegExp(n.source,"g"),r=/[<>"']|&(?!(#\d{1,7}|#[Xx][a-fA-F0-9]{1,6}|\w+);)/,i=new RegExp(r.source,"g"),l={"&":"&","<":"<",">":">",'"':""","'":"'"},o=e=>l[e];function a(e,t){if(t){if(n.test(e))return e.replace(s,o)}else if(r.test(e))return e.replace(i,o);return e}const c=/&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/gi;function h(e){return 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k={},x=/^[^:]+:\/*[^/]*$/,m=/^([^:]+:)[\s\S]*$/,b=/^([^:]+:\/*[^/]*)[\s\S]*$/;const w={exec:function(){}};function _(e,t){const n=e.replace(/\|/g,((e,t,n)=>{let s=!1,r=t;for(;--r>=0&&"\\"===n[r];)s=!s;return s?"|":" |"})).split(/ \|/);let s=0;if(n[0].trim()||n.shift(),n.length>0&&!n[n.length-1].trim()&&n.pop(),n.length>t)n.splice(t);else for(;n.length<t;)n.push("");for(;s<n.length;s++)n[s]=n[s].trim().replace(/\\\|/g,"|");return n}function y(e,t,n){const s=e.length;if(0===s)return"";let r=0;for(;r<s;){const i=e.charAt(s-r-1);if(i!==t||n){if(i===t||!n)break;r++}else r++}return e.slice(0,s-r)}function $(e,t){if(t<1)return"";let n="";for(;t>1;)1&t&&(n+=e),t>>=1,e+=e;return n+e}function z(e,t,n,s){const r=t.href,i=t.title?a(t.title):null,l=e[1].replace(/\\([\[\]])/g,"$1");if("!"!==e[0].charAt(0)){s.state.inLink=!0;const e={type:"link",raw:n,href:r,title:i,text:l,tokens:s.inlineTokens(l)};return s.state.inLink=!1,e}return{type:"image",raw:n,href:r,title:i,text:a(l)}}class 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T={escape:/^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,autolink:/^<(scheme:[^\s\x00-\x1f<>]*|email)>/,url:w,tag:"^comment|^</[a-zA-Z][\\w:-]*\\s*>|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>|^<\\?[\\s\\S]*?\\?>|^<![a-zA-Z]+\\s[\\s\\S]*?>|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>",link:/^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,reflink:/^!?\[(label)\]\[(ref)\]/,nolink:/^!?\[(ref)\](?:\[\])?/,reflinkSearch:"reflink|nolink(?!\\()",emStrong:{lDelim:/^(?:\*+(?:([punct_])|[^\s*]))|^_+(?:([punct*])|([^\s_]))/,rDelimAst:/^(?:[^_*\\]|\\.)*?\_\_(?:[^_*\\]|\\.)*?\*(?:[^_*\\]|\\.)*?(?=\_\_)|(?:[^*\\]|\\.)+(?=[^*])|[punct_](\*+)(?=[\s]|$)|(?:[^punct*_\s\\]|\\.)(\*+)(?=[punct_\s]|$)|[punct_\s](\*+)(?=[^punct*_\s])|[\s](\*+)(?=[punct_])|[punct_](\*+)(?=[punct_])|(?:[^punct*_\s\\]|\\.)(\*+)(?=[^punct*_\s])/,rDelimUnd:/^(?:[^_*\\]|\\.)*?\*\*(?:[^_*\\]|\\.)*?\_(?:[^_*\\]|\\.)*?(?=\*\*)|(?:[^_\\]|\\.)+(?=[^_])|[punct*](\_+)(?=[\s]|$)|(?:[^punct*_\s\\]|\\.)(\_+)(?=[punct*\s]|$)|[punct*\s](\_+)(?=[^punct*_\s])|[\s](\_+)(?=[punct*])|[punct*](\_+)(?=[punct*])/},code:/^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,br:/^( {2,}|\\)\n(?!\s*$)/,del:w,text:/^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*_]|\b_|$)|[^ ](?= {2,}\n)))/,punctuation:/^([\spunctuation])/};function A(e){return e.replace(/---/g,"—").replace(/--/g,"–").replace(/(^|[-\u2014/(\[{"\s])'/g,"$1‘").replace(/'/g,"’").replace(/(^|[-\u2014/(\[{\u2018\s])"/g,"$1“").replace(/"/g,"”").replace(/\.{3}/g,"…")}function E(e){let t,n,s="";const r=e.length;for(t=0;t<r;t++)n=e.charCodeAt(t),Math.random()>.5&&(n="x"+n.toString(16)),s+="&#"+n+";";return s}T._punctuation="!\"#$%&'()+\\-.,/:;<=>?@\\[\\]`^{|}~",T.punctuation=u(T.punctuation).replace(/punctuation/g,T._punctuation).getRegex(),T.blockSkip=/\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g,T.escapedEmSt=/(?:^|[^\\])(?:\\\\)*\\[*_]/g,T._comment=u(R._comment).replace("(?:--\x3e|$)","--\x3e").getRegex(),T.emStrong.lDelim=u(T.emStrong.lDelim).replace(/punct/g,T._punctuation).getRegex(),T.emStrong.rDelimAst=u(T.emStrong.rDelimAst,"g").replace(/punct/g,T._punctuation).getRegex(),T.emStrong.rDelimUnd=u(T.emStrong.rDelimUnd,"g").replace(/punct/g,T._punctuation).getRegex(),T._escapes=/\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g,T._scheme=/[a-zA-Z][a-zA-Z0-9+.-]{1,31}/,T._email=/[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/,T.autolink=u(T.autolink).replace("scheme",T._scheme).replace("email",T._email).getRegex(),T._attribute=/\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/,T.tag=u(T.tag).replace("comment",T._comment).replace("attribute",T._attribute).getRegex(),T._label=/(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/,T._href=/<(?:\\.|[^\n<>\\])+>|[^\s\x00-\x1f]*/,T._title=/"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/,T.link=u(T.link).replace("label",T._label).replace("href",T._href).replace("title",T._title).getRegex(),T.reflink=u(T.reflink).replace("label",T._label).replace("ref",R._label).getRegex(),T.nolink=u(T.nolink).replace("ref",R._label).getRegex(),T.reflinkSearch=u(T.reflinkSearch,"g").replace("reflink",T.reflink).replace("nolink",T.nolink).getRegex(),T.normal={...T},T.pedantic={...T.normal,strong:{start:/^__|\*\*/,middle:/^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,endAst:/\*\*(?!\*)/g,endUnd:/__(?!_)/g},em:{start:/^_|\*/,middle:/^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,endAst:/\*(?!\*)/g,endUnd:/_(?!_)/g},link:u(/^!?\[(label)\]\((.*?)\)/).replace("label",T._label).getRegex(),reflink:u(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace("label",T._label).getRegex()},T.gfm={...T.normal,escape:u(T.escape).replace("])","~|])").getRegex(),_extended_email:/[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,url:/^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,_backpedal:/(?:[^?!.,:;*_'"~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_'"~)]+(?!$))+/,del:/^(~~?)(?=[^\s~])([\s\S]*?[^\s~])\1(?=[^~]|$)/,text:/^([`~]+|[^`~])(?:(?= {2,}\n)|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)|[\s\S]*?(?:(?=[\\<!\[`*~_]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)))/},T.gfm.url=u(T.gfm.url,"i").replace("email",T.gfm._extended_email).getRegex(),T.breaks={...T.gfm,br:u(T.br).replace("{2,}","*").getRegex(),text:u(T.gfm.text).replace("\\b_","\\b_| {2,}\\n").replace(/\{2,\}/g,"*").getRegex()};class v{constructor(e){this.tokens=[],this.tokens.links=Object.create(null),this.options=e||t,this.options.tokenizer=this.options.tokenizer||new S,this.tokenizer=this.options.tokenizer,this.tokenizer.options=this.options,this.tokenizer.lexer=this,this.inlineQueue=[],this.state={inLink:!1,inRawBlock:!1,top:!0};const n={block:R.normal,inline:T.normal};this.options.pedantic?(n.block=R.pedantic,n.inline=T.pedantic):this.options.gfm&&(n.block=R.gfm,this.options.breaks?n.inline=T.breaks:n.inline=T.gfm),this.tokenizer.rules=n}static get rules(){return{block:R,inline:T}}static lex(e,t){return new v(t).lex(e)}static lexInline(e,t){return new v(t).inlineTokens(e)}lex(e){let t;for(e=e.replace(/\r\n|\r/g,"\n"),this.blockTokens(e,this.tokens);t=this.inlineQueue.shift();)this.inlineTokens(t.src,t.tokens);return this.tokens}blockTokens(e,t=[]){let n,s,r,i;for(e=this.options.pedantic?e.replace(/\t/g," ").replace(/^ +$/gm,""):e.replace(/^( *)(\t+)/gm,((e,t,n)=>t+" ".repeat(n.length)));e;)if(!(this.options.extensions&&this.options.extensions.block&&this.options.extensions.block.some((s=>!!(n=s.call({lexer:this},e,t))&&(e=e.substring(n.raw.length),t.push(n),!0)))))if(n=this.tokenizer.space(e))e=e.substring(n.raw.length),1===n.raw.length&&t.length>0?t[t.length-1].raw+="\n":t.push(n);else if(n=this.tokenizer.code(e))e=e.substring(n.raw.length),s=t[t.length-1],!s||"paragraph"!==s.type&&"text"!==s.type?t.push(n):(s.raw+="\n"+n.raw,s.text+="\n"+n.text,this.inlineQueue[this.inlineQueue.length-1].src=s.text);else if(n=this.tokenizer.fences(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.heading(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.hr(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.blockquote(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.list(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.html(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.def(e))e=e.substring(n.raw.length),s=t[t.length-1],!s||"paragraph"!==s.type&&"text"!==s.type?this.tokens.links[n.tag]||(this.tokens.links[n.tag]={href:n.href,title:n.title}):(s.raw+="\n"+n.raw,s.text+="\n"+n.raw,this.inlineQueue[this.inlineQueue.length-1].src=s.text);else if(n=this.tokenizer.table(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.lheading(e))e=e.substring(n.raw.length),t.push(n);else{if(r=e,this.options.extensions&&this.options.extensions.startBlock){let t=1/0;const n=e.slice(1);let s;this.options.extensions.startBlock.forEach((function(e){s=e.call({lexer:this},n),"number"==typeof s&&s>=0&&(t=Math.min(t,s))})),t<1/0&&t>=0&&(r=e.substring(0,t+1))}if(this.state.top&&(n=this.tokenizer.paragraph(r)))s=t[t.length-1],i&&"paragraph"===s.type?(s.raw+="\n"+n.raw,s.text+="\n"+n.text,this.inlineQueue.pop(),this.inlineQueue[this.inlineQueue.length-1].src=s.text):t.push(n),i=r.length!==e.length,e=e.substring(n.raw.length);else if(n=this.tokenizer.text(e))e=e.substring(n.raw.length),s=t[t.length-1],s&&"text"===s.type?(s.raw+="\n"+n.raw,s.text+="\n"+n.text,this.inlineQueue.pop(),this.inlineQueue[this.inlineQueue.length-1].src=s.text):t.push(n);else if(e){const t="Infinite loop on byte: "+e.charCodeAt(0);if(this.options.silent){console.error(t);break}throw new Error(t)}}return this.state.top=!0,t}inline(e,t=[]){return this.inlineQueue.push({src:e,tokens:t}),t}inlineTokens(e,t=[]){let n,s,r,i,l,o,a=e;if(this.tokens.links){const e=Object.keys(this.tokens.links);if(e.length>0)for(;null!=(i=this.tokenizer.rules.inline.reflinkSearch.exec(a));)e.includes(i[0].slice(i[0].lastIndexOf("[")+1,-1))&&(a=a.slice(0,i.index)+"["+$("a",i[0].length-2)+"]"+a.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex))}for(;null!=(i=this.tokenizer.rules.inline.blockSkip.exec(a));)a=a.slice(0,i.index)+"["+$("a",i[0].length-2)+"]"+a.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);for(;null!=(i=this.tokenizer.rules.inline.escapedEmSt.exec(a));)a=a.slice(0,i.index+i[0].length-2)+"++"+a.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex),this.tokenizer.rules.inline.escapedEmSt.lastIndex--;for(;e;)if(l||(o=""),l=!1,!(this.options.extensions&&this.options.extensions.inline&&this.options.extensions.inline.some((s=>!!(n=s.call({lexer:this},e,t))&&(e=e.substring(n.raw.length),t.push(n),!0)))))if(n=this.tokenizer.escape(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.tag(e))e=e.substring(n.raw.length),s=t[t.length-1],s&&"text"===n.type&&"text"===s.type?(s.raw+=n.raw,s.text+=n.text):t.push(n);else if(n=this.tokenizer.link(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.reflink(e,this.tokens.links))e=e.substring(n.raw.length),s=t[t.length-1],s&&"text"===n.type&&"text"===s.type?(s.raw+=n.raw,s.text+=n.text):t.push(n);else if(n=this.tokenizer.emStrong(e,a,o))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.codespan(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.br(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.del(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.autolink(e,E))e=e.substring(n.raw.length),t.push(n);else if(this.state.inLink||!(n=this.tokenizer.url(e,E))){if(r=e,this.options.extensions&&this.options.extensions.startInline){let t=1/0;const n=e.slice(1);let s;this.options.extensions.startInline.forEach((function(e){s=e.call({lexer:this},n),"number"==typeof s&&s>=0&&(t=Math.min(t,s))})),t<1/0&&t>=0&&(r=e.substring(0,t+1))}if(n=this.tokenizer.inlineText(r,A))e=e.substring(n.raw.length),"_"!==n.raw.slice(-1)&&(o=n.raw.slice(-1)),l=!0,s=t[t.length-1],s&&"text"===s.type?(s.raw+=n.raw,s.text+=n.text):t.push(n);else if(e){const t="Infinite loop on byte: "+e.charCodeAt(0);if(this.options.silent){console.error(t);break}throw new Error(t)}}else e=e.substring(n.raw.length),t.push(n);return t}}class I{constructor(e){this.options=e||t}code(e,t,n){const s=(t||"").match(/\S*/)[0];if(this.options.highlight){const t=this.options.highlight(e,s);null!=t&&t!==e&&(n=!0,e=t)}return e=e.replace(/\n$/,"")+"\n",s?'<pre><code class="'+this.options.langPrefix+a(s)+'">'+(n?e:a(e,!0))+"</code></pre>\n":"<pre><code>"+(n?e:a(e,!0))+"</code></pre>\n"}blockquote(e){return`<blockquote>\n${e}</blockquote>\n`}html(e){return e}heading(e,t,n,s){if(this.options.headerIds){return`<h${t} id="${this.options.headerPrefix+s.slug(n)}">${e}</h${t}>\n`}return`<h${t}>${e}</h${t}>\n`}hr(){return this.options.xhtml?"<hr/>\n":"<hr>\n"}list(e,t,n){const s=t?"ol":"ul";return"<"+s+(t&&1!==n?' start="'+n+'"':"")+">\n"+e+"</"+s+">\n"}listitem(e){return`<li>${e}</li>\n`}checkbox(e){return"<input "+(e?'checked="" ':"")+'disabled="" type="checkbox"'+(this.options.xhtml?" /":"")+"> "}paragraph(e){return`<p>${e}</p>\n`}table(e,t){return t&&(t=`<tbody>${t}</tbody>`),"<table>\n<thead>\n"+e+"</thead>\n"+t+"</table>\n"}tablerow(e){return`<tr>\n${e}</tr>\n`}tablecell(e,t){const n=t.header?"th":"td";return(t.align?`<${n} align="${t.align}">`:`<${n}>`)+e+`</${n}>\n`}strong(e){return`<strong>${e}</strong>`}em(e){return`<em>${e}</em>`}codespan(e){return`<code>${e}</code>`}br(){return this.options.xhtml?"<br/>":"<br>"}del(e){return`<del>${e}</del>`}link(e,t,n){if(null===(e=f(this.options.sanitize,this.options.baseUrl,e)))return n;let s='<a href="'+e+'"';return t&&(s+=' title="'+t+'"'),s+=">"+n+"</a>",s}image(e,t,n){if(null===(e=f(this.options.sanitize,this.options.baseUrl,e)))return n;let s=`<img src="${e}" alt="${n}"`;return t&&(s+=` title="${t}"`),s+=this.options.xhtml?"/>":">",s}text(e){return e}}class q{strong(e){return e}em(e){return e}codespan(e){return e}del(e){return e}html(e){return e}text(e){return e}link(e,t,n){return""+n}image(e,t,n){return""+n}br(){return""}}class L{constructor(){this.seen={}}serialize(e){return e.toLowerCase().trim().replace(/<[!\/a-z].*?>/gi,"").replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g,"").replace(/\s/g,"-")}getNextSafeSlug(e,t){let n=e,s=0;if(this.seen.hasOwnProperty(n)){s=this.seen[e];do{s++,n=e+"-"+s}while(this.seen.hasOwnProperty(n))}return t||(this.seen[e]=s,this.seen[n]=0),n}slug(e,t={}){const n=this.serialize(e);return this.getNextSafeSlug(n,t.dryrun)}}class C{constructor(e){this.options=e||t,this.options.renderer=this.options.renderer||new I,this.renderer=this.options.renderer,this.renderer.options=this.options,this.textRenderer=new q,this.slugger=new L}static parse(e,t){return new C(t).parse(e)}static parseInline(e,t){return new C(t).parseInline(e)}parse(e,t=!0){let n,s,r,i,l,o,a,c,p,u,g,d,f,k,x,m,b,w,_,y="";const $=e.length;for(n=0;n<$;n++)if(u=e[n],this.options.extensions&&this.options.extensions.renderers&&this.options.extensions.renderers[u.type]&&(_=this.options.extensions.renderers[u.type].call({parser:this},u),!1!==_||!["space","hr","heading","code","table","blockquote","list","html","paragraph","text"].includes(u.type)))y+=_||"";else switch(u.type){case"space":continue;case"hr":y+=this.renderer.hr();continue;case"heading":y+=this.renderer.heading(this.parseInline(u.tokens),u.depth,h(this.parseInline(u.tokens,this.textRenderer)),this.slugger);continue;case"code":y+=this.renderer.code(u.text,u.lang,u.escaped);continue;case"table":for(c="",a="",i=u.header.length,s=0;s<i;s++)a+=this.renderer.tablecell(this.parseInline(u.header[s].tokens),{header:!0,align:u.align[s]});for(c+=this.renderer.tablerow(a),p="",i=u.rows.length,s=0;s<i;s++){for(o=u.rows[s],a="",l=o.length,r=0;r<l;r++)a+=this.renderer.tablecell(this.parseInline(o[r].tokens),{header:!1,align:u.align[r]});p+=this.renderer.tablerow(a)}y+=this.renderer.table(c,p);continue;case"blockquote":p=this.parse(u.tokens),y+=this.renderer.blockquote(p);continue;case"list":for(g=u.ordered,d=u.start,f=u.loose,i=u.items.length,p="",s=0;s<i;s++)x=u.items[s],m=x.checked,b=x.task,k="",x.task&&(w=this.renderer.checkbox(m),f?x.tokens.length>0&&"paragraph"===x.tokens[0].type?(x.tokens[0].text=w+" "+x.tokens[0].text,x.tokens[0].tokens&&x.tokens[0].tokens.length>0&&"text"===x.tokens[0].tokens[0].type&&(x.tokens[0].tokens[0].text=w+" "+x.tokens[0].tokens[0].text)):x.tokens.unshift({type:"text",text:w}):k+=w),k+=this.parse(x.tokens,f),p+=this.renderer.listitem(k,b,m);y+=this.renderer.list(p,g,d);continue;case"html":y+=this.renderer.html(u.text);continue;case"paragraph":y+=this.renderer.paragraph(this.parseInline(u.tokens));continue;case"text":for(p=u.tokens?this.parseInline(u.tokens):u.text;n+1<$&&"text"===e[n+1].type;)u=e[++n],p+="\n"+(u.tokens?this.parseInline(u.tokens):u.text);y+=t?this.renderer.paragraph(p):p;continue;default:{const e='Token with "'+u.type+'" type was not found.';if(this.options.silent)return void console.error(e);throw new Error(e)}}return y}parseInline(e,t){t=t||this.renderer;let n,s,r,i="";const 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+/*!
+ * The reveal.js markdown plugin. Handles parsing of
+ * markdown inside of presentations as well as loading
+ * of external markdown documents.
+ */
+const N="__SCRIPT_END__",O=/\[\s*((\d*):)?\s*([\s\d,|-]*)\]/,D={"&":"&","<":"<",">":">",'"':""","'":"'"},B=()=>{let e;function t(e){let t=(e.querySelector("[data-template]")||e.querySelector("script")||e).textContent;t=t.replace(new RegExp(N,"g"),"<\/script>");const n=t.match(/^\n?(\s*)/)[1].length,s=t.match(/^\n?(\t*)/)[1].length;return s>0?t=t.replace(new RegExp("\\n?\\t{"+s+"}(.*)","g"),(function(e,t){return"\n"+t})):n>1&&(t=t.replace(new RegExp("\\n? {"+n+"}(.*)","g"),(function(e,t){return"\n"+t}))),t}function n(e){const t=e.attributes,n=[];for(let e=0,s=t.length;e<s;e++){const s=t[e].name,r=t[e].value;/data\-(markdown|separator|vertical|notes)/gi.test(s)||(r?n.push(s+'="'+r+'"'):n.push(s))}return n.join(" ")}function s(t){const n=e?.getConfig?.().markdown;return(t=t||{}).separator=t.separator||n?.separator||"\r?\n---\r?\n",t.verticalSeparator=t.verticalSeparator||n?.verticalSeparator||null,t.notesSeparator=t.notesSeparator||n?.notesSeparator||"^s*notes?:",t.attributes=t.attributes||"",t}function r(e,t){t=s(t);const n=e.split(new RegExp(t.notesSeparator,"mgi"));return 2===n.length&&(e=n[0]+'<aside class="notes">'+M(n[1].trim())+"</aside>"),'<script type="text/template">'+(e=e.replace(/<\/script>/g,N))+"<\/script>"}function i(e,t){t=s(t);const n=new RegExp(t.separator+(t.verticalSeparator?"|"+t.verticalSeparator:""),"mg"),i=new RegExp(t.separator);let l,o,a,c=0,h=!0,p=[];for(;l=n.exec(e);)o=i.test(l[0]),!o&&h&&p.push([]),a=e.substring(c,l.index),o&&h?p.push(a):p[p.length-1].push(a),c=n.lastIndex,h=o;(h?p:p[p.length-1]).push(e.substring(c));let u="";for(let e=0,n=p.length;e<n;e++)p[e]instanceof Array?(u+="<section "+t.attributes+">",p[e].forEach((function(e){u+="<section data-markdown>"+r(e,t)+"</section>"})),u+="</section>"):u+="<section "+t.attributes+" data-markdown>"+r(p[e],t)+"</section>";return u}function l(e){return new Promise((function(s){const r=[];[].slice.call(e.querySelectorAll("section[data-markdown]:not([data-markdown-parsed])")).forEach((function(e,s){e.getAttribute("data-markdown").length?r.push(function(e){return new Promise((function(t,n){const s=new XMLHttpRequest,r=e.getAttribute("data-markdown"),i=e.getAttribute("data-charset");null!==i&&""!==i&&s.overrideMimeType("text/html; charset="+i),s.onreadystatechange=function(e,s){4===s.readyState&&(s.status>=200&&s.status<300||0===s.status?t(s,r):n(s,r))}.bind(this,e,s),s.open("GET",r,!0);try{s.send()}catch(e){console.warn("Failed to get the Markdown file "+r+". Make sure that the presentation and the file are served by a HTTP server and the file can be found there. "+e),t(s,r)}}))}(e).then((function(t,s){e.outerHTML=i(t.responseText,{separator:e.getAttribute("data-separator"),verticalSeparator:e.getAttribute("data-separator-vertical"),notesSeparator:e.getAttribute("data-separator-notes"),attributes:n(e)})}),(function(t,n){e.outerHTML='<section data-state="alert">ERROR: The attempt to fetch '+n+" failed with HTTP status "+t.status+".Check your browser's JavaScript console for more details.<p>Remember that you need to serve the presentation HTML from a HTTP server.</p></section>"}))):e.outerHTML=i(t(e),{separator:e.getAttribute("data-separator"),verticalSeparator:e.getAttribute("data-separator-vertical"),notesSeparator:e.getAttribute("data-separator-notes"),attributes:n(e)})})),Promise.all(r).then(s)}))}function o(e,t,n){const s=new RegExp(n,"mg"),r=new RegExp('([^"= ]+?)="([^"]+?)"|(data-[^"= ]+?)(?=[" ])',"mg");let i,l,o=e.nodeValue;if(i=s.exec(o)){const n=i[1];for(o=o.substring(0,i.index)+o.substring(s.lastIndex),e.nodeValue=o;l=r.exec(n);)l[2]?t.setAttribute(l[1],l[2]):t.setAttribute(l[3],"");return!0}return!1}function a(e,t,n,s,r){if(null!==t&&void 0!==t.childNodes&&t.childNodes.length>0){let n=t;for(let i=0;i<t.childNodes.length;i++){const l=t.childNodes[i];if(i>0){let e=i-1;for(;e>=0;){const s=t.childNodes[e];if("function"==typeof s.setAttribute&&"BR"!==s.tagName){n=s;break}e-=1}}let o=e;"section"===l.nodeName&&(o=l,n=l),"function"!=typeof l.setAttribute&&l.nodeType!==Node.COMMENT_NODE||a(o,l,n,s,r)}}t.nodeType===Node.COMMENT_NODE&&!1===o(t,n,s)&&o(t,e,r)}function c(){const n=e.getRevealElement().querySelectorAll("[data-markdown]:not([data-markdown-parsed])");return[].slice.call(n).forEach((function(e){e.setAttribute("data-markdown-parsed",!0);const n=e.querySelector("aside.notes"),s=t(e);e.innerHTML=M(s),a(e,e,null,e.getAttribute("data-element-attributes")||e.parentNode.getAttribute("data-element-attributes")||"\\.element\\s*?(.+?)$",e.getAttribute("data-attributes")||e.parentNode.getAttribute("data-attributes")||"\\.slide:\\s*?(\\S.+?)$"),n&&e.appendChild(n)})),Promise.resolve()}return{id:"markdown",init:function(t){e=t;let{renderer:n,animateLists:s,...r}=e.getConfig().markdown||{};return n||(n=new M.Renderer,n.code=(e,t)=>{let n="",s="";if(O.test(t)){let e=t.match(O)[2];e&&(n=`data-ln-start-from="${e.trim()}"`),s=t.match(O)[3].trim(),s=`data-line-numbers="${s}"`,t=t.replace(O,"").trim()}return`<pre><code ${s} ${n} class="${t}">${e=e.replace(/([&<>'"])/g,(e=>D[e]))}</code></pre>`}),!0===s&&(n.listitem=e=>`<li class="fragment">${e}</li>`),M.setOptions({renderer:n,...r}),l(e.getRevealElement()).then(c)},processSlides:l,convertSlides:c,slidify:i,marked:M}};export{B as default};
diff --git a/_freeze/site_libs/revealjs/plugin/markdown/markdown.js b/_freeze/site_libs/revealjs/plugin/markdown/markdown.js
@@ -0,0 +1,7 @@
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s}R._punctuation="!\"#$%&'()+\\-.,/:;<=>?@\\[\\]`^{|}~",R.punctuation=u(R.punctuation).replace(/punctuation/g,R._punctuation).getRegex(),R.blockSkip=/\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g,R.escapedEmSt=/(?:^|[^\\])(?:\\\\)*\\[*_]/g,R._comment=u(T._comment).replace("(?:--\x3e|$)","--\x3e").getRegex(),R.emStrong.lDelim=u(R.emStrong.lDelim).replace(/punct/g,R._punctuation).getRegex(),R.emStrong.rDelimAst=u(R.emStrong.rDelimAst,"g").replace(/punct/g,R._punctuation).getRegex(),R.emStrong.rDelimUnd=u(R.emStrong.rDelimUnd,"g").replace(/punct/g,R._punctuation).getRegex(),R._escapes=/\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g,R._scheme=/[a-zA-Z][a-zA-Z0-9+.-]{1,31}/,R._email=/[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/,R.autolink=u(R.autolink).replace("scheme",R._scheme).replace("email",R._email).getRegex(),R._attribute=/\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/,R.tag=u(R.tag).replace("comment",R._comment).replace("attribute",R._attribute).getRegex(),R._label=/(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/,R._href=/<(?:\\.|[^\n<>\\])+>|[^\s\x00-\x1f]*/,R._title=/"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/,R.link=u(R.link).replace("label",R._label).replace("href",R._href).replace("title",R._title).getRegex(),R.reflink=u(R.reflink).replace("label",R._label).replace("ref",T._label).getRegex(),R.nolink=u(R.nolink).replace("ref",T._label).getRegex(),R.reflinkSearch=u(R.reflinkSearch,"g").replace("reflink",R.reflink).replace("nolink",R.nolink).getRegex(),R.normal={...R},R.pedantic={...R.normal,strong:{start:/^__|\*\*/,middle:/^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,endAst:/\*\*(?!\*)/g,endUnd:/__(?!_)/g},em:{start:/^_|\*/,middle:/^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,endAst:/\*(?!\*)/g,endUnd:/_(?!_)/g},link:u(/^!?\[(label)\]\((.*?)\)/).replace("label",R._label).getRegex(),reflink:u(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace("label",R._label).getRegex()},R.gfm={...R.normal,escape:u(R.escape).replace("])","~|])").getRegex(),_extended_email:/[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,url:/^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,_backpedal:/(?:[^?!.,:;*_'"~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_'"~)]+(?!$))+/,del:/^(~~?)(?=[^\s~])([\s\S]*?[^\s~])\1(?=[^~]|$)/,text:/^([`~]+|[^`~])(?:(?= {2,}\n)|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)|[\s\S]*?(?:(?=[\\<!\[`*~_]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)))/},R.gfm.url=u(R.gfm.url,"i").replace("email",R.gfm._extended_email).getRegex(),R.breaks={...R.gfm,br:u(R.br).replace("{2,}","*").getRegex(),text:u(R.gfm.text).replace("\\b_","\\b_| {2,}\\n").replace(/\{2,\}/g,"*").getRegex()};class v{constructor(e){this.tokens=[],this.tokens.links=Object.create(null),this.options=e||t,this.options.tokenizer=this.options.tokenizer||new S,this.tokenizer=this.options.tokenizer,this.tokenizer.options=this.options,this.tokenizer.lexer=this,this.inlineQueue=[],this.state={inLink:!1,inRawBlock:!1,top:!0};const n={block:T.normal,inline:R.normal};this.options.pedantic?(n.block=T.pedantic,n.inline=R.pedantic):this.options.gfm&&(n.block=T.gfm,this.options.breaks?n.inline=R.breaks:n.inline=R.gfm),this.tokenizer.rules=n}static get rules(){return{block:T,inline:R}}static lex(e,t){return new v(t).lex(e)}static lexInline(e,t){return new v(t).inlineTokens(e)}lex(e){let t;for(e=e.replace(/\r\n|\r/g,"\n"),this.blockTokens(e,this.tokens);t=this.inlineQueue.shift();)this.inlineTokens(t.src,t.tokens);return this.tokens}blockTokens(e,t=[]){let n,s,r,i;for(e=this.options.pedantic?e.replace(/\t/g," ").replace(/^ +$/gm,""):e.replace(/^( *)(\t+)/gm,((e,t,n)=>t+" ".repeat(n.length)));e;)if(!(this.options.extensions&&this.options.extensions.block&&this.options.extensions.block.some((s=>!!(n=s.call({lexer:this},e,t))&&(e=e.substring(n.raw.length),t.push(n),!0)))))if(n=this.tokenizer.space(e))e=e.substring(n.raw.length),1===n.raw.length&&t.length>0?t[t.length-1].raw+="\n":t.push(n);else if(n=this.tokenizer.code(e))e=e.substring(n.raw.length),s=t[t.length-1],!s||"paragraph"!==s.type&&"text"!==s.type?t.push(n):(s.raw+="\n"+n.raw,s.text+="\n"+n.text,this.inlineQueue[this.inlineQueue.length-1].src=s.text);else if(n=this.tokenizer.fences(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.heading(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.hr(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.blockquote(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.list(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.html(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.def(e))e=e.substring(n.raw.length),s=t[t.length-1],!s||"paragraph"!==s.type&&"text"!==s.type?this.tokens.links[n.tag]||(this.tokens.links[n.tag]={href:n.href,title:n.title}):(s.raw+="\n"+n.raw,s.text+="\n"+n.raw,this.inlineQueue[this.inlineQueue.length-1].src=s.text);else if(n=this.tokenizer.table(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.lheading(e))e=e.substring(n.raw.length),t.push(n);else{if(r=e,this.options.extensions&&this.options.extensions.startBlock){let t=1/0;const n=e.slice(1);let s;this.options.extensions.startBlock.forEach((function(e){s=e.call({lexer:this},n),"number"==typeof s&&s>=0&&(t=Math.min(t,s))})),t<1/0&&t>=0&&(r=e.substring(0,t+1))}if(this.state.top&&(n=this.tokenizer.paragraph(r)))s=t[t.length-1],i&&"paragraph"===s.type?(s.raw+="\n"+n.raw,s.text+="\n"+n.text,this.inlineQueue.pop(),this.inlineQueue[this.inlineQueue.length-1].src=s.text):t.push(n),i=r.length!==e.length,e=e.substring(n.raw.length);else if(n=this.tokenizer.text(e))e=e.substring(n.raw.length),s=t[t.length-1],s&&"text"===s.type?(s.raw+="\n"+n.raw,s.text+="\n"+n.text,this.inlineQueue.pop(),this.inlineQueue[this.inlineQueue.length-1].src=s.text):t.push(n);else if(e){const t="Infinite loop on byte: "+e.charCodeAt(0);if(this.options.silent){console.error(t);break}throw new Error(t)}}return this.state.top=!0,t}inline(e,t=[]){return this.inlineQueue.push({src:e,tokens:t}),t}inlineTokens(e,t=[]){let n,s,r,i,l,o,a=e;if(this.tokens.links){const e=Object.keys(this.tokens.links);if(e.length>0)for(;null!=(i=this.tokenizer.rules.inline.reflinkSearch.exec(a));)e.includes(i[0].slice(i[0].lastIndexOf("[")+1,-1))&&(a=a.slice(0,i.index)+"["+$("a",i[0].length-2)+"]"+a.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex))}for(;null!=(i=this.tokenizer.rules.inline.blockSkip.exec(a));)a=a.slice(0,i.index)+"["+$("a",i[0].length-2)+"]"+a.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);for(;null!=(i=this.tokenizer.rules.inline.escapedEmSt.exec(a));)a=a.slice(0,i.index+i[0].length-2)+"++"+a.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex),this.tokenizer.rules.inline.escapedEmSt.lastIndex--;for(;e;)if(l||(o=""),l=!1,!(this.options.extensions&&this.options.extensions.inline&&this.options.extensions.inline.some((s=>!!(n=s.call({lexer:this},e,t))&&(e=e.substring(n.raw.length),t.push(n),!0)))))if(n=this.tokenizer.escape(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.tag(e))e=e.substring(n.raw.length),s=t[t.length-1],s&&"text"===n.type&&"text"===s.type?(s.raw+=n.raw,s.text+=n.text):t.push(n);else if(n=this.tokenizer.link(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.reflink(e,this.tokens.links))e=e.substring(n.raw.length),s=t[t.length-1],s&&"text"===n.type&&"text"===s.type?(s.raw+=n.raw,s.text+=n.text):t.push(n);else if(n=this.tokenizer.emStrong(e,a,o))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.codespan(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.br(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.del(e))e=e.substring(n.raw.length),t.push(n);else if(n=this.tokenizer.autolink(e,E))e=e.substring(n.raw.length),t.push(n);else if(this.state.inLink||!(n=this.tokenizer.url(e,E))){if(r=e,this.options.extensions&&this.options.extensions.startInline){let t=1/0;const n=e.slice(1);let s;this.options.extensions.startInline.forEach((function(e){s=e.call({lexer:this},n),"number"==typeof s&&s>=0&&(t=Math.min(t,s))})),t<1/0&&t>=0&&(r=e.substring(0,t+1))}if(n=this.tokenizer.inlineText(r,A))e=e.substring(n.raw.length),"_"!==n.raw.slice(-1)&&(o=n.raw.slice(-1)),l=!0,s=t[t.length-1],s&&"text"===s.type?(s.raw+=n.raw,s.text+=n.text):t.push(n);else if(e){const t="Infinite loop on byte: "+e.charCodeAt(0);if(this.options.silent){console.error(t);break}throw new Error(t)}}else e=e.substring(n.raw.length),t.push(n);return t}}class I{constructor(e){this.options=e||t}code(e,t,n){const s=(t||"").match(/\S*/)[0];if(this.options.highlight){const t=this.options.highlight(e,s);null!=t&&t!==e&&(n=!0,e=t)}return e=e.replace(/\n$/,"")+"\n",s?'<pre><code class="'+this.options.langPrefix+a(s)+'">'+(n?e:a(e,!0))+"</code></pre>\n":"<pre><code>"+(n?e:a(e,!0))+"</code></pre>\n"}blockquote(e){return`<blockquote>\n${e}</blockquote>\n`}html(e){return e}heading(e,t,n,s){if(this.options.headerIds){return`<h${t} id="${this.options.headerPrefix+s.slug(n)}">${e}</h${t}>\n`}return`<h${t}>${e}</h${t}>\n`}hr(){return this.options.xhtml?"<hr/>\n":"<hr>\n"}list(e,t,n){const s=t?"ol":"ul";return"<"+s+(t&&1!==n?' start="'+n+'"':"")+">\n"+e+"</"+s+">\n"}listitem(e){return`<li>${e}</li>\n`}checkbox(e){return"<input "+(e?'checked="" ':"")+'disabled="" type="checkbox"'+(this.options.xhtml?" /":"")+"> "}paragraph(e){return`<p>${e}</p>\n`}table(e,t){return t&&(t=`<tbody>${t}</tbody>`),"<table>\n<thead>\n"+e+"</thead>\n"+t+"</table>\n"}tablerow(e){return`<tr>\n${e}</tr>\n`}tablecell(e,t){const n=t.header?"th":"td";return(t.align?`<${n} align="${t.align}">`:`<${n}>`)+e+`</${n}>\n`}strong(e){return`<strong>${e}</strong>`}em(e){return`<em>${e}</em>`}codespan(e){return`<code>${e}</code>`}br(){return this.options.xhtml?"<br/>":"<br>"}del(e){return`<del>${e}</del>`}link(e,t,n){if(null===(e=f(this.options.sanitize,this.options.baseUrl,e)))return n;let s='<a href="'+e+'"';return t&&(s+=' title="'+t+'"'),s+=">"+n+"</a>",s}image(e,t,n){if(null===(e=f(this.options.sanitize,this.options.baseUrl,e)))return n;let s=`<img src="${e}" alt="${n}"`;return t&&(s+=` title="${t}"`),s+=this.options.xhtml?"/>":">",s}text(e){return e}}class q{strong(e){return e}em(e){return e}codespan(e){return e}del(e){return e}html(e){return e}text(e){return e}link(e,t,n){return""+n}image(e,t,n){return""+n}br(){return""}}class L{constructor(){this.seen={}}serialize(e){return e.toLowerCase().trim().replace(/<[!\/a-z].*?>/gi,"").replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g,"").replace(/\s/g,"-")}getNextSafeSlug(e,t){let n=e,s=0;if(this.seen.hasOwnProperty(n)){s=this.seen[e];do{s++,n=e+"-"+s}while(this.seen.hasOwnProperty(n))}return t||(this.seen[e]=s,this.seen[n]=0),n}slug(e,t={}){const n=this.serialize(e);return this.getNextSafeSlug(n,t.dryrun)}}class C{constructor(e){this.options=e||t,this.options.renderer=this.options.renderer||new I,this.renderer=this.options.renderer,this.renderer.options=this.options,this.textRenderer=new q,this.slugger=new L}static parse(e,t){return new C(t).parse(e)}static parseInline(e,t){return new C(t).parseInline(e)}parse(e,t=!0){let n,s,r,i,l,o,a,c,p,u,g,d,f,k,x,m,b,w,y,_="";const $=e.length;for(n=0;n<$;n++)if(u=e[n],this.options.extensions&&this.options.extensions.renderers&&this.options.extensions.renderers[u.type]&&(y=this.options.extensions.renderers[u.type].call({parser:this},u),!1!==y||!["space","hr","heading","code","table","blockquote","list","html","paragraph","text"].includes(u.type)))_+=y||"";else switch(u.type){case"space":continue;case"hr":_+=this.renderer.hr();continue;case"heading":_+=this.renderer.heading(this.parseInline(u.tokens),u.depth,h(this.parseInline(u.tokens,this.textRenderer)),this.slugger);continue;case"code":_+=this.renderer.code(u.text,u.lang,u.escaped);continue;case"table":for(c="",a="",i=u.header.length,s=0;s<i;s++)a+=this.renderer.tablecell(this.parseInline(u.header[s].tokens),{header:!0,align:u.align[s]});for(c+=this.renderer.tablerow(a),p="",i=u.rows.length,s=0;s<i;s++){for(o=u.rows[s],a="",l=o.length,r=0;r<l;r++)a+=this.renderer.tablecell(this.parseInline(o[r].tokens),{header:!1,align:u.align[r]});p+=this.renderer.tablerow(a)}_+=this.renderer.table(c,p);continue;case"blockquote":p=this.parse(u.tokens),_+=this.renderer.blockquote(p);continue;case"list":for(g=u.ordered,d=u.start,f=u.loose,i=u.items.length,p="",s=0;s<i;s++)x=u.items[s],m=x.checked,b=x.task,k="",x.task&&(w=this.renderer.checkbox(m),f?x.tokens.length>0&&"paragraph"===x.tokens[0].type?(x.tokens[0].text=w+" "+x.tokens[0].text,x.tokens[0].tokens&&x.tokens[0].tokens.length>0&&"text"===x.tokens[0].tokens[0].type&&(x.tokens[0].tokens[0].text=w+" "+x.tokens[0].tokens[0].text)):x.tokens.unshift({type:"text",text:w}):k+=w),k+=this.parse(x.tokens,f),p+=this.renderer.listitem(k,b,m);_+=this.renderer.list(p,g,d);continue;case"html":_+=this.renderer.html(u.text);continue;case"paragraph":_+=this.renderer.paragraph(this.parseInline(u.tokens));continue;case"text":for(p=u.tokens?this.parseInline(u.tokens):u.text;n+1<$&&"text"===e[n+1].type;)u=e[++n],p+="\n"+(u.tokens?this.parseInline(u.tokens):u.text);_+=t?this.renderer.paragraph(p):p;continue;default:{const e='Token with "'+u.type+'" type was not found.';if(this.options.silent)return void console.error(e);throw new Error(e)}}return _}parseInline(e,t){t=t||this.renderer;let n,s,r,i="";const l=e.length;for(n=0;n<l;n++)if(s=e[n],this.options.extensions&&this.options.extensions.renderers&&this.options.extensions.renderers[s.type]&&(r=this.options.extensions.renderers[s.type].call({parser:this},s),!1!==r||!["escape","html","link","image","strong","em","codespan","br","del","text"].includes(s.type)))i+=r||"";else switch(s.type){case"escape":case"text":i+=t.text(s.text);break;case"html":i+=t.html(s.text);break;case"link":i+=t.link(s.href,s.title,this.parseInline(s.tokens,t));break;case"image":i+=t.image(s.href,s.title,s.text);break;case"strong":i+=t.strong(this.parseInline(s.tokens,t));break;case"em":i+=t.em(this.parseInline(s.tokens,t));break;case"codespan":i+=t.codespan(s.text);break;case"br":i+=t.br();break;case"del":i+=t.del(this.parseInline(s.tokens,t));break;default:{const e='Token with "'+s.type+'" type was not found.';if(this.options.silent)return void console.error(e);throw new Error(e)}}return i}}class Z{constructor(e){this.options=e||t}static passThroughHooks=new Set(["preprocess","postprocess"]);preprocess(e){return e}postprocess(e){return e}}function M(e,t){return(n,s,r)=>{"function"==typeof s&&(r=s,s=null);const i={...s},l=function(e,t,n){return s=>{if(s.message+="\nPlease report this to https://github.com/markedjs/marked.",e){const e="<p>An error occurred:</p><pre>"+a(s.message+"",!0)+"</pre>";return t?Promise.resolve(e):n?void n(null,e):e}if(t)return Promise.reject(s);if(!n)throw s;n(s)}}((s={...P.defaults,...i}).silent,s.async,r);if(null==n)return l(new Error("marked(): input parameter is undefined or null"));if("string"!=typeof n)return l(new Error("marked(): input parameter is of type "+Object.prototype.toString.call(n)+", string expected"));if(function(e){e&&e.sanitize&&!e.silent&&console.warn("marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. 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+/*!
+ * The reveal.js markdown plugin. Handles parsing of
+ * markdown inside of presentations as well as loading
+ * of external markdown documents.
+ */
+const N="__SCRIPT_END__",O=/\[\s*((\d*):)?\s*([\s\d,|-]*)\]/,D={"&":"&","<":"<",">":">",'"':""","'":"'"};return()=>{let e;function t(e){let t=(e.querySelector("[data-template]")||e.querySelector("script")||e).textContent;t=t.replace(new RegExp(N,"g"),"<\/script>");const n=t.match(/^\n?(\s*)/)[1].length,s=t.match(/^\n?(\t*)/)[1].length;return s>0?t=t.replace(new RegExp("\\n?\\t{"+s+"}(.*)","g"),(function(e,t){return"\n"+t})):n>1&&(t=t.replace(new RegExp("\\n? {"+n+"}(.*)","g"),(function(e,t){return"\n"+t}))),t}function n(e){const t=e.attributes,n=[];for(let e=0,s=t.length;e<s;e++){const s=t[e].name,r=t[e].value;/data\-(markdown|separator|vertical|notes)/gi.test(s)||(r?n.push(s+'="'+r+'"'):n.push(s))}return n.join(" ")}function s(t){const n=e?.getConfig?.().markdown;return(t=t||{}).separator=t.separator||n?.separator||"\r?\n---\r?\n",t.verticalSeparator=t.verticalSeparator||n?.verticalSeparator||null,t.notesSeparator=t.notesSeparator||n?.notesSeparator||"^s*notes?:",t.attributes=t.attributes||"",t}function r(e,t){t=s(t);const n=e.split(new RegExp(t.notesSeparator,"mgi"));return 2===n.length&&(e=n[0]+'<aside class="notes">'+P(n[1].trim())+"</aside>"),'<script type="text/template">'+(e=e.replace(/<\/script>/g,N))+"<\/script>"}function i(e,t){t=s(t);const n=new RegExp(t.separator+(t.verticalSeparator?"|"+t.verticalSeparator:""),"mg"),i=new RegExp(t.separator);let l,o,a,c=0,h=!0,p=[];for(;l=n.exec(e);)o=i.test(l[0]),!o&&h&&p.push([]),a=e.substring(c,l.index),o&&h?p.push(a):p[p.length-1].push(a),c=n.lastIndex,h=o;(h?p:p[p.length-1]).push(e.substring(c));let u="";for(let e=0,n=p.length;e<n;e++)p[e]instanceof Array?(u+="<section "+t.attributes+">",p[e].forEach((function(e){u+="<section data-markdown>"+r(e,t)+"</section>"})),u+="</section>"):u+="<section "+t.attributes+" data-markdown>"+r(p[e],t)+"</section>";return u}function l(e){return new Promise((function(s){const r=[];[].slice.call(e.querySelectorAll("section[data-markdown]:not([data-markdown-parsed])")).forEach((function(e,s){e.getAttribute("data-markdown").length?r.push(function(e){return new Promise((function(t,n){const s=new XMLHttpRequest,r=e.getAttribute("data-markdown"),i=e.getAttribute("data-charset");null!==i&&""!==i&&s.overrideMimeType("text/html; charset="+i),s.onreadystatechange=function(e,s){4===s.readyState&&(s.status>=200&&s.status<300||0===s.status?t(s,r):n(s,r))}.bind(this,e,s),s.open("GET",r,!0);try{s.send()}catch(e){console.warn("Failed to get the Markdown file "+r+". Make sure that the presentation and the file are served by a HTTP server and the file can be found there. "+e),t(s,r)}}))}(e).then((function(t,s){e.outerHTML=i(t.responseText,{separator:e.getAttribute("data-separator"),verticalSeparator:e.getAttribute("data-separator-vertical"),notesSeparator:e.getAttribute("data-separator-notes"),attributes:n(e)})}),(function(t,n){e.outerHTML='<section data-state="alert">ERROR: The attempt to fetch '+n+" failed with HTTP status "+t.status+".Check your browser's JavaScript console for more details.<p>Remember that you need to serve the presentation HTML from a HTTP server.</p></section>"}))):e.outerHTML=i(t(e),{separator:e.getAttribute("data-separator"),verticalSeparator:e.getAttribute("data-separator-vertical"),notesSeparator:e.getAttribute("data-separator-notes"),attributes:n(e)})})),Promise.all(r).then(s)}))}function o(e,t,n){const s=new RegExp(n,"mg"),r=new RegExp('([^"= ]+?)="([^"]+?)"|(data-[^"= ]+?)(?=[" ])',"mg");let i,l,o=e.nodeValue;if(i=s.exec(o)){const n=i[1];for(o=o.substring(0,i.index)+o.substring(s.lastIndex),e.nodeValue=o;l=r.exec(n);)l[2]?t.setAttribute(l[1],l[2]):t.setAttribute(l[3],"");return!0}return!1}function a(e,t,n,s,r){if(null!==t&&void 0!==t.childNodes&&t.childNodes.length>0){let n=t;for(let i=0;i<t.childNodes.length;i++){const l=t.childNodes[i];if(i>0){let e=i-1;for(;e>=0;){const s=t.childNodes[e];if("function"==typeof s.setAttribute&&"BR"!==s.tagName){n=s;break}e-=1}}let o=e;"section"===l.nodeName&&(o=l,n=l),"function"!=typeof l.setAttribute&&l.nodeType!==Node.COMMENT_NODE||a(o,l,n,s,r)}}t.nodeType===Node.COMMENT_NODE&&!1===o(t,n,s)&&o(t,e,r)}function c(){const n=e.getRevealElement().querySelectorAll("[data-markdown]:not([data-markdown-parsed])");return[].slice.call(n).forEach((function(e){e.setAttribute("data-markdown-parsed",!0);const n=e.querySelector("aside.notes"),s=t(e);e.innerHTML=P(s),a(e,e,null,e.getAttribute("data-element-attributes")||e.parentNode.getAttribute("data-element-attributes")||"\\.element\\s*?(.+?)$",e.getAttribute("data-attributes")||e.parentNode.getAttribute("data-attributes")||"\\.slide:\\s*?(\\S.+?)$"),n&&e.appendChild(n)})),Promise.resolve()}return{id:"markdown",init:function(t){e=t;let{renderer:n,animateLists:s,...r}=e.getConfig().markdown||{};return n||(n=new P.Renderer,n.code=(e,t)=>{let n="",s="";if(O.test(t)){let e=t.match(O)[2];e&&(n=`data-ln-start-from="${e.trim()}"`),s=t.match(O)[3].trim(),s=`data-line-numbers="${s}"`,t=t.replace(O,"").trim()}return`<pre><code ${s} ${n} class="${t}">${e=e.replace(/([&<>'"])/g,(e=>D[e]))}</code></pre>`}),!0===s&&(n.listitem=e=>`<li class="fragment">${e}</li>`),P.setOptions({renderer:n,...r}),l(e.getRevealElement()).then(c)},processSlides:l,convertSlides:c,slidify:i,marked:P}}}));
diff --git a/_freeze/site_libs/revealjs/plugin/markdown/plugin.js b/_freeze/site_libs/revealjs/plugin/markdown/plugin.js
@@ -0,0 +1,491 @@
+/*!
+ * The reveal.js markdown plugin. Handles parsing of
+ * markdown inside of presentations as well as loading
+ * of external markdown documents.
+ */
+
+import { marked } from 'marked';
+
+const DEFAULT_SLIDE_SEPARATOR = '\r?\n---\r?\n',
+ DEFAULT_VERTICAL_SEPARATOR = null,
+ DEFAULT_NOTES_SEPARATOR = '^\s*notes?:',
+ DEFAULT_ELEMENT_ATTRIBUTES_SEPARATOR = '\\\.element\\\s*?(.+?)$',
+ DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR = '\\\.slide:\\\s*?(\\\S.+?)$';
+
+const SCRIPT_END_PLACEHOLDER = '__SCRIPT_END__';
+
+// match an optional line number offset and highlight line numbers
+// [<line numbers>] or [<offset>: <line numbers>]
+const CODE_LINE_NUMBER_REGEX = /\[\s*((\d*):)?\s*([\s\d,|-]*)\]/;
+
+const HTML_ESCAPE_MAP = {
+ '&': '&',
+ '<': '<',
+ '>': '>',
+ '"': '"',
+ "'": '''
+};
+
+const Plugin = () => {
+
+ // The reveal.js instance this plugin is attached to
+ let deck;
+
+ /**
+ * Retrieves the markdown contents of a slide section
+ * element. Normalizes leading tabs/whitespace.
+ */
+ function getMarkdownFromSlide( section ) {
+
+ // look for a <script> or <textarea data-template> wrapper
+ const template = section.querySelector( '[data-template]' ) || section.querySelector( 'script' );
+
+ // strip leading whitespace so it isn't evaluated as code
+ let text = ( template || section ).textContent;
+
+ // restore script end tags
+ text = text.replace( new RegExp( SCRIPT_END_PLACEHOLDER, 'g' ), '</script>' );
+
+ const leadingWs = text.match( /^\n?(\s*)/ )[1].length,
+ leadingTabs = text.match( /^\n?(\t*)/ )[1].length;
+
+ if( leadingTabs > 0 ) {
+ text = text.replace( new RegExp('\\n?\\t{' + leadingTabs + '}(.*)','g'), function(m, p1) { return '\n' + p1 ; } );
+ }
+ else if( leadingWs > 1 ) {
+ text = text.replace( new RegExp('\\n? {' + leadingWs + '}(.*)', 'g'), function(m, p1) { return '\n' + p1 ; } );
+ }
+
+ return text;
+
+ }
+
+ /**
+ * Given a markdown slide section element, this will
+ * return all arguments that aren't related to markdown
+ * parsing. Used to forward any other user-defined arguments
+ * to the output markdown slide.
+ */
+ function getForwardedAttributes( section ) {
+
+ const attributes = section.attributes;
+ const result = [];
+
+ for( let i = 0, len = attributes.length; i < len; i++ ) {
+ const name = attributes[i].name,
+ value = attributes[i].value;
+
+ // disregard attributes that are used for markdown loading/parsing
+ if( /data\-(markdown|separator|vertical|notes)/gi.test( name ) ) continue;
+
+ if( value ) {
+ result.push( name + '="' + value + '"' );
+ }
+ else {
+ result.push( name );
+ }
+ }
+
+ return result.join( ' ' );
+
+ }
+
+ /**
+ * Inspects the given options and fills out default
+ * values for what's not defined.
+ */
+ function getSlidifyOptions( options ) {
+ const markdownConfig = deck?.getConfig?.().markdown;
+
+ options = options || {};
+ options.separator = options.separator || markdownConfig?.separator || DEFAULT_SLIDE_SEPARATOR;
+ options.verticalSeparator = options.verticalSeparator || markdownConfig?.verticalSeparator || DEFAULT_VERTICAL_SEPARATOR;
+ options.notesSeparator = options.notesSeparator || markdownConfig?.notesSeparator || DEFAULT_NOTES_SEPARATOR;
+ options.attributes = options.attributes || '';
+
+ return options;
+
+ }
+
+ /**
+ * Helper function for constructing a markdown slide.
+ */
+ function createMarkdownSlide( content, options ) {
+
+ options = getSlidifyOptions( options );
+
+ const notesMatch = content.split( new RegExp( options.notesSeparator, 'mgi' ) );
+
+ if( notesMatch.length === 2 ) {
+ content = notesMatch[0] + '<aside class="notes">' + marked(notesMatch[1].trim()) + '</aside>';
+ }
+
+ // prevent script end tags in the content from interfering
+ // with parsing
+ content = content.replace( /<\/script>/g, SCRIPT_END_PLACEHOLDER );
+
+ return '<script type="text/template">' + content + '</script>';
+
+ }
+
+ /**
+ * Parses a data string into multiple slides based
+ * on the passed in separator arguments.
+ */
+ function slidify( markdown, options ) {
+
+ options = getSlidifyOptions( options );
+
+ const separatorRegex = new RegExp( options.separator + ( options.verticalSeparator ? '|' + options.verticalSeparator : '' ), 'mg' ),
+ horizontalSeparatorRegex = new RegExp( options.separator );
+
+ let matches,
+ lastIndex = 0,
+ isHorizontal,
+ wasHorizontal = true,
+ content,
+ sectionStack = [];
+
+ // iterate until all blocks between separators are stacked up
+ while( matches = separatorRegex.exec( markdown ) ) {
+ const notes = null;
+
+ // determine direction (horizontal by default)
+ isHorizontal = horizontalSeparatorRegex.test( matches[0] );
+
+ if( !isHorizontal && wasHorizontal ) {
+ // create vertical stack
+ sectionStack.push( [] );
+ }
+
+ // pluck slide content from markdown input
+ content = markdown.substring( lastIndex, matches.index );
+
+ if( isHorizontal && wasHorizontal ) {
+ // add to horizontal stack
+ sectionStack.push( content );
+ }
+ else {
+ // add to vertical stack
+ sectionStack[sectionStack.length-1].push( content );
+ }
+
+ lastIndex = separatorRegex.lastIndex;
+ wasHorizontal = isHorizontal;
+ }
+
+ // add the remaining slide
+ ( wasHorizontal ? sectionStack : sectionStack[sectionStack.length-1] ).push( markdown.substring( lastIndex ) );
+
+ let markdownSections = '';
+
+ // flatten the hierarchical stack, and insert <section data-markdown> tags
+ for( let i = 0, len = sectionStack.length; i < len; i++ ) {
+ // vertical
+ if( sectionStack[i] instanceof Array ) {
+ markdownSections += '<section '+ options.attributes +'>';
+
+ sectionStack[i].forEach( function( child ) {
+ markdownSections += '<section data-markdown>' + createMarkdownSlide( child, options ) + '</section>';
+ } );
+
+ markdownSections += '</section>';
+ }
+ else {
+ markdownSections += '<section '+ options.attributes +' data-markdown>' + createMarkdownSlide( sectionStack[i], options ) + '</section>';
+ }
+ }
+
+ return markdownSections;
+
+ }
+
+ /**
+ * Parses any current data-markdown slides, splits
+ * multi-slide markdown into separate sections and
+ * handles loading of external markdown.
+ */
+ function processSlides( scope ) {
+
+ return new Promise( function( resolve ) {
+
+ const externalPromises = [];
+
+ [].slice.call( scope.querySelectorAll( 'section[data-markdown]:not([data-markdown-parsed])') ).forEach( function( section, i ) {
+
+ if( section.getAttribute( 'data-markdown' ).length ) {
+
+ externalPromises.push( loadExternalMarkdown( section ).then(
+
+ // Finished loading external file
+ function( xhr, url ) {
+ section.outerHTML = slidify( xhr.responseText, {
+ separator: section.getAttribute( 'data-separator' ),
+ verticalSeparator: section.getAttribute( 'data-separator-vertical' ),
+ notesSeparator: section.getAttribute( 'data-separator-notes' ),
+ attributes: getForwardedAttributes( section )
+ });
+ },
+
+ // Failed to load markdown
+ function( xhr, url ) {
+ section.outerHTML = '<section data-state="alert">' +
+ 'ERROR: The attempt to fetch ' + url + ' failed with HTTP status ' + xhr.status + '.' +
+ 'Check your browser\'s JavaScript console for more details.' +
+ '<p>Remember that you need to serve the presentation HTML from a HTTP server.</p>' +
+ '</section>';
+ }
+
+ ) );
+
+ }
+ else {
+
+ section.outerHTML = slidify( getMarkdownFromSlide( section ), {
+ separator: section.getAttribute( 'data-separator' ),
+ verticalSeparator: section.getAttribute( 'data-separator-vertical' ),
+ notesSeparator: section.getAttribute( 'data-separator-notes' ),
+ attributes: getForwardedAttributes( section )
+ });
+
+ }
+
+ });
+
+ Promise.all( externalPromises ).then( resolve );
+
+ } );
+
+ }
+
+ function loadExternalMarkdown( section ) {
+
+ return new Promise( function( resolve, reject ) {
+
+ const xhr = new XMLHttpRequest(),
+ url = section.getAttribute( 'data-markdown' );
+
+ const datacharset = section.getAttribute( 'data-charset' );
+
+ // see https://developer.mozilla.org/en-US/docs/Web/API/element.getAttribute#Notes
+ if( datacharset !== null && datacharset !== '' ) {
+ xhr.overrideMimeType( 'text/html; charset=' + datacharset );
+ }
+
+ xhr.onreadystatechange = function( section, xhr ) {
+ if( xhr.readyState === 4 ) {
+ // file protocol yields status code 0 (useful for local debug, mobile applications etc.)
+ if ( ( xhr.status >= 200 && xhr.status < 300 ) || xhr.status === 0 ) {
+
+ resolve( xhr, url );
+
+ }
+ else {
+
+ reject( xhr, url );
+
+ }
+ }
+ }.bind( this, section, xhr );
+
+ xhr.open( 'GET', url, true );
+
+ try {
+ xhr.send();
+ }
+ catch ( e ) {
+ console.warn( 'Failed to get the Markdown file ' + url + '. Make sure that the presentation and the file are served by a HTTP server and the file can be found there. ' + e );
+ resolve( xhr, url );
+ }
+
+ } );
+
+ }
+
+ /**
+ * Check if a node value has the attributes pattern.
+ * If yes, extract it and add that value as one or several attributes
+ * to the target element.
+ *
+ * You need Cache Killer on Chrome to see the effect on any FOM transformation
+ * directly on refresh (F5)
+ * http://stackoverflow.com/questions/5690269/disabling-chrome-cache-for-website-development/7000899#answer-11786277
+ */
+ function addAttributeInElement( node, elementTarget, separator ) {
+
+ const markdownClassesInElementsRegex = new RegExp( separator, 'mg' );
+ const markdownClassRegex = new RegExp( "([^\"= ]+?)=\"([^\"]+?)\"|(data-[^\"= ]+?)(?=[\" ])", 'mg' );
+ let nodeValue = node.nodeValue;
+ let matches,
+ matchesClass;
+ if( matches = markdownClassesInElementsRegex.exec( nodeValue ) ) {
+
+ const classes = matches[1];
+ nodeValue = nodeValue.substring( 0, matches.index ) + nodeValue.substring( markdownClassesInElementsRegex.lastIndex );
+ node.nodeValue = nodeValue;
+ while( matchesClass = markdownClassRegex.exec( classes ) ) {
+ if( matchesClass[2] ) {
+ elementTarget.setAttribute( matchesClass[1], matchesClass[2] );
+ } else {
+ elementTarget.setAttribute( matchesClass[3], "" );
+ }
+ }
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Add attributes to the parent element of a text node,
+ * or the element of an attribute node.
+ */
+ function addAttributes( section, element, previousElement, separatorElementAttributes, separatorSectionAttributes ) {
+
+ if ( element !== null && element.childNodes !== undefined && element.childNodes.length > 0 ) {
+ let previousParentElement = element;
+ for( let i = 0; i < element.childNodes.length; i++ ) {
+ const childElement = element.childNodes[i];
+ if ( i > 0 ) {
+ let j = i - 1;
+ while ( j >= 0 ) {
+ const aPreviousChildElement = element.childNodes[j];
+ if ( typeof aPreviousChildElement.setAttribute === 'function' && aPreviousChildElement.tagName !== "BR" ) {
+ previousParentElement = aPreviousChildElement;
+ break;
+ }
+ j = j - 1;
+ }
+ }
+ let parentSection = section;
+ if( childElement.nodeName === "section" ) {
+ parentSection = childElement ;
+ previousParentElement = childElement ;
+ }
+ if ( typeof childElement.setAttribute === 'function' || childElement.nodeType === Node.COMMENT_NODE ) {
+ addAttributes( parentSection, childElement, previousParentElement, separatorElementAttributes, separatorSectionAttributes );
+ }
+ }
+ }
+
+ if ( element.nodeType === Node.COMMENT_NODE ) {
+ if ( addAttributeInElement( element, previousElement, separatorElementAttributes ) === false ) {
+ addAttributeInElement( element, section, separatorSectionAttributes );
+ }
+ }
+ }
+
+ /**
+ * Converts any current data-markdown slides in the
+ * DOM to HTML.
+ */
+ function convertSlides() {
+
+ const sections = deck.getRevealElement().querySelectorAll( '[data-markdown]:not([data-markdown-parsed])');
+
+ [].slice.call( sections ).forEach( function( section ) {
+
+ section.setAttribute( 'data-markdown-parsed', true )
+
+ const notes = section.querySelector( 'aside.notes' );
+ const markdown = getMarkdownFromSlide( section );
+
+ section.innerHTML = marked( markdown );
+ addAttributes( section, section, null, section.getAttribute( 'data-element-attributes' ) ||
+ section.parentNode.getAttribute( 'data-element-attributes' ) ||
+ DEFAULT_ELEMENT_ATTRIBUTES_SEPARATOR,
+ section.getAttribute( 'data-attributes' ) ||
+ section.parentNode.getAttribute( 'data-attributes' ) ||
+ DEFAULT_SLIDE_ATTRIBUTES_SEPARATOR);
+
+ // If there were notes, we need to re-add them after
+ // having overwritten the section's HTML
+ if( notes ) {
+ section.appendChild( notes );
+ }
+
+ } );
+
+ return Promise.resolve();
+
+ }
+
+ function escapeForHTML( input ) {
+
+ return input.replace( /([&<>'"])/g, char => HTML_ESCAPE_MAP[char] );
+
+ }
+
+ return {
+ id: 'markdown',
+
+ /**
+ * Starts processing and converting Markdown within the
+ * current reveal.js deck.
+ */
+ init: function( reveal ) {
+
+ deck = reveal;
+
+ let { renderer, animateLists, ...markedOptions } = deck.getConfig().markdown || {};
+
+ if( !renderer ) {
+ renderer = new marked.Renderer();
+
+ renderer.code = ( code, language ) => {
+
+ // Off by default
+ let lineNumberOffset = '';
+ let lineNumbers = '';
+
+ // Users can opt in to show line numbers and highlight
+ // specific lines.
+ // ```javascript [] show line numbers
+ // ```javascript [1,4-8] highlights lines 1 and 4-8
+ // optional line number offset:
+ // ```javascript [25: 1,4-8] start line numbering at 25,
+ // highlights lines 1 (numbered as 25) and 4-8 (numbered as 28-32)
+ if( CODE_LINE_NUMBER_REGEX.test( language ) ) {
+ let lineNumberOffsetMatch = language.match( CODE_LINE_NUMBER_REGEX )[2];
+ if (lineNumberOffsetMatch){
+ lineNumberOffset = `data-ln-start-from="${lineNumberOffsetMatch.trim()}"`;
+ }
+
+ lineNumbers = language.match( CODE_LINE_NUMBER_REGEX )[3].trim();
+ lineNumbers = `data-line-numbers="${lineNumbers}"`;
+ language = language.replace( CODE_LINE_NUMBER_REGEX, '' ).trim();
+ }
+
+ // Escape before this gets injected into the DOM to
+ // avoid having the HTML parser alter our code before
+ // highlight.js is able to read it
+ code = escapeForHTML( code );
+
+ // return `<pre><code ${lineNumbers} class="${language}">${code}</code></pre>`;
+
+ return `<pre><code ${lineNumbers} ${lineNumberOffset} class="${language}">${code}</code></pre>`;
+ };
+ }
+
+ if( animateLists === true ) {
+ renderer.listitem = text => `<li class="fragment">${text}</li>`;
+ }
+
+ marked.setOptions( {
+ renderer,
+ ...markedOptions
+ } );
+
+ return processSlides( deck.getRevealElement() ).then( convertSlides );
+
+ },
+
+ // TODO: Do these belong in the API?
+ processSlides: processSlides,
+ convertSlides: convertSlides,
+ slidify: slidify,
+ marked: marked
+ }
+
+};
+
+export default Plugin;
diff --git a/_freeze/site_libs/revealjs/plugin/math/katex.js b/_freeze/site_libs/revealjs/plugin/math/katex.js
@@ -0,0 +1,96 @@
+/**
+ * A plugin which enables rendering of math equations inside
+ * of reveal.js slides. Essentially a thin wrapper for KaTeX.
+ *
+ * @author Hakim El Hattab
+ * @author Gerhard Burger
+ */
+export const KaTeX = () => {
+ let deck;
+
+ let defaultOptions = {
+ version: 'latest',
+ delimiters: [
+ {left: '$$', right: '$$', display: true}, // Note: $$ has to come before $
+ {left: '$', right: '$', display: false},
+ {left: '\\(', right: '\\)', display: false},
+ {left: '\\[', right: '\\]', display: true}
+ ],
+ ignoredTags: ['script', 'noscript', 'style', 'textarea', 'pre']
+ }
+
+ const loadCss = src => {
+ let link = document.createElement('link');
+ link.rel = 'stylesheet';
+ link.href = src;
+ document.head.appendChild(link);
+ };
+
+ /**
+ * Loads a JavaScript file and returns a Promise for when it is loaded
+ * Credits: https://aaronsmith.online/easily-load-an-external-script-using-javascript/
+ */
+ const loadScript = src => {
+ return new Promise((resolve, reject) => {
+ const script = document.createElement('script')
+ script.type = 'text/javascript'
+ script.onload = resolve
+ script.onerror = reject
+ script.src = src
+ document.head.append(script)
+ })
+ };
+
+ async function loadScripts(urls) {
+ for(const url of urls) {
+ await loadScript(url);
+ }
+ }
+
+ return {
+ id: 'katex',
+
+ init: function (reveal) {
+
+ deck = reveal;
+
+ let revealOptions = deck.getConfig().katex || {};
+
+ let options = {...defaultOptions, ...revealOptions};
+ const {local, version, extensions, ...katexOptions} = options;
+
+ let baseUrl = options.local || 'https://cdn.jsdelivr.net/npm/katex';
+ let versionString = options.local ? '' : '@' + options.version;
+
+ let cssUrl = baseUrl + versionString + '/dist/katex.min.css';
+ let katexUrl = baseUrl + versionString + '/dist/katex.min.js';
+ let mhchemUrl = baseUrl + versionString + '/dist/contrib/mhchem.min.js'
+ let karUrl = baseUrl + versionString + '/dist/contrib/auto-render.min.js';
+
+ let katexScripts = [katexUrl];
+ if(options.extensions && options.extensions.includes("mhchem")) {
+ katexScripts.push(mhchemUrl);
+ }
+ katexScripts.push(karUrl);
+
+ const renderMath = () => {
+ renderMathInElement(reveal.getSlidesElement(), katexOptions);
+ deck.layout();
+ }
+
+ loadCss(cssUrl);
+
+ // For some reason dynamically loading with defer attribute doesn't result in the expected behavior, the below code does
+ loadScripts(katexScripts).then(() => {
+ if( deck.isReady() ) {
+ renderMath();
+ }
+ else {
+ deck.on( 'ready', renderMath.bind( this ) );
+ }
+ });
+
+ }
+ }
+
+};
diff --git a/_freeze/site_libs/revealjs/plugin/math/math.esm.js b/_freeze/site_libs/revealjs/plugin/math/math.esm.js
@@ -0,0 +1,6 @@
+const t=()=>{let t,e={messageStyle:"none",tex2jax:{inlineMath:[["$","$"],["\\(","\\)"]],skipTags:["script","noscript","style","textarea","pre"]},skipStartupTypeset:!0};return{id:"mathjax2",init:function(a){t=a;let n=t.getConfig().mathjax2||t.getConfig().math||{},i={...e,...n},s=(i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js")+"?config="+(i.config||"TeX-AMS_HTML-full");i.tex2jax={...e.tex2jax,...n.tex2jax},i.mathjax=i.config=null,function(t,e){let a=document.querySelector("head"),n=document.createElement("script");n.type="text/javascript",n.src=t;let i=()=>{"function"==typeof e&&(e.call(),e=null)};n.onload=i,n.onreadystatechange=()=>{"loaded"===this.readyState&&i()},a.appendChild(n)}(s,(function(){MathJax.Hub.Config(i),MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.getRevealElement()]),MathJax.Hub.Queue(t.layout),t.on("slidechanged",(function(t){MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.currentSlide])}))}))}}},e=t;
+/*!
+ * This plugin is a wrapper for the MathJax2,
+ * MathJax3 and KaTeX typesetter plugins.
+ */
+var a=Plugin=Object.assign(e(),{KaTeX:()=>{let t,e={version:"latest",delimiters:[{left:"$$",right:"$$",display:!0},{left:"$",right:"$",display:!1},{left:"\\(",right:"\\)",display:!1},{left:"\\[",right:"\\]",display:!0}],ignoredTags:["script","noscript","style","textarea","pre"]};const a=t=>new Promise(((e,a)=>{const n=document.createElement("script");n.type="text/javascript",n.onload=e,n.onerror=a,n.src=t,document.head.append(n)}));return{id:"katex",init:function(n){t=n;let i=t.getConfig().katex||{},s={...e,...i};const{local:l,version:o,extensions:r,...c}=s;let d=s.local||"https://cdn.jsdelivr.net/npm/katex",p=s.local?"":"@"+s.version,u=d+p+"/dist/katex.min.css",h=d+p+"/dist/contrib/mhchem.min.js",x=d+p+"/dist/contrib/auto-render.min.js",m=[d+p+"/dist/katex.min.js"];s.extensions&&s.extensions.includes("mhchem")&&m.push(h),m.push(x);const f=()=>{renderMathInElement(n.getSlidesElement(),c),t.layout()};(t=>{let e=document.createElement("link");e.rel="stylesheet",e.href=t,document.head.appendChild(e)})(u),async function(t){for(const e of t)await a(e)}(m).then((()=>{t.isReady()?f():t.on("ready",f.bind(this))}))}}},MathJax2:t,MathJax3:()=>{let t,e={tex:{inlineMath:[["$","$"],["\\(","\\)"]]},options:{skipHtmlTags:["script","noscript","style","textarea","pre"]},startup:{ready:()=>{MathJax.startup.defaultReady(),MathJax.startup.promise.then((()=>{t.layout()}))}}};return{id:"mathjax3",init:function(a){t=a;let n=t.getConfig().mathjax3||{},i={...e,...n};i.tex={...e.tex,...n.tex},i.options={...e.options,...n.options},i.startup={...e.startup,...n.startup};let s=i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js";i.mathjax=null,window.MathJax=i,function(t,e){let a=document.createElement("script");a.type="text/javascript",a.id="MathJax-script",a.src=t,a.async=!0,a.onload=()=>{"function"==typeof e&&(e.call(),e=null)},document.head.appendChild(a)}(s,(function(){t.addEventListener("slidechanged",(function(t){MathJax.typeset()}))}))}}}});export{a as default};
diff --git a/_freeze/site_libs/revealjs/plugin/math/math.js b/_freeze/site_libs/revealjs/plugin/math/math.js
@@ -0,0 +1 @@
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).RevealMath=e()}(this,(function(){"use strict";const t=()=>{let t,e={messageStyle:"none",tex2jax:{inlineMath:[["$","$"],["\\(","\\)"]],skipTags:["script","noscript","style","textarea","pre"]},skipStartupTypeset:!0};return{id:"mathjax2",init:function(n){t=n;let a=t.getConfig().mathjax2||t.getConfig().math||{},i={...e,...a},s=(i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js")+"?config="+(i.config||"TeX-AMS_HTML-full");i.tex2jax={...e.tex2jax,...a.tex2jax},i.mathjax=i.config=null,function(t,e){let n=document.querySelector("head"),a=document.createElement("script");a.type="text/javascript",a.src=t;let i=()=>{"function"==typeof e&&(e.call(),e=null)};a.onload=i,a.onreadystatechange=()=>{"loaded"===this.readyState&&i()},n.appendChild(a)}(s,(function(){MathJax.Hub.Config(i),MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.getRevealElement()]),MathJax.Hub.Queue(t.layout),t.on("slidechanged",(function(t){MathJax.Hub.Queue(["Typeset",MathJax.Hub,t.currentSlide])}))}))}}},e=t;return Plugin=Object.assign(e(),{KaTeX:()=>{let t,e={version:"latest",delimiters:[{left:"$$",right:"$$",display:!0},{left:"$",right:"$",display:!1},{left:"\\(",right:"\\)",display:!1},{left:"\\[",right:"\\]",display:!0}],ignoredTags:["script","noscript","style","textarea","pre"]};const n=t=>new Promise(((e,n)=>{const a=document.createElement("script");a.type="text/javascript",a.onload=e,a.onerror=n,a.src=t,document.head.append(a)}));return{id:"katex",init:function(a){t=a;let i=t.getConfig().katex||{},s={...e,...i};const{local:o,version:l,extensions:r,...c}=s;let d=s.local||"https://cdn.jsdelivr.net/npm/katex",u=s.local?"":"@"+s.version,p=d+u+"/dist/katex.min.css",h=d+u+"/dist/contrib/mhchem.min.js",x=d+u+"/dist/contrib/auto-render.min.js",m=[d+u+"/dist/katex.min.js"];s.extensions&&s.extensions.includes("mhchem")&&m.push(h),m.push(x);const f=()=>{renderMathInElement(a.getSlidesElement(),c),t.layout()};(t=>{let e=document.createElement("link");e.rel="stylesheet",e.href=t,document.head.appendChild(e)})(p),async function(t){for(const e of t)await n(e)}(m).then((()=>{t.isReady()?f():t.on("ready",f.bind(this))}))}}},MathJax2:t,MathJax3:()=>{let t,e={tex:{inlineMath:[["$","$"],["\\(","\\)"]]},options:{skipHtmlTags:["script","noscript","style","textarea","pre"]},startup:{ready:()=>{MathJax.startup.defaultReady(),MathJax.startup.promise.then((()=>{t.layout()}))}}};return{id:"mathjax3",init:function(n){t=n;let a=t.getConfig().mathjax3||{},i={...e,...a};i.tex={...e.tex,...a.tex},i.options={...e.options,...a.options},i.startup={...e.startup,...a.startup};let s=i.mathjax||"https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js";i.mathjax=null,window.MathJax=i,function(t,e){let n=document.createElement("script");n.type="text/javascript",n.id="MathJax-script",n.src=t,n.async=!0,n.onload=()=>{"function"==typeof e&&(e.call(),e=null)},document.head.appendChild(n)}(s,(function(){t.addEventListener("slidechanged",(function(t){MathJax.typeset()}))}))}}}})}));
diff --git a/_freeze/site_libs/revealjs/plugin/math/mathjax2.js b/_freeze/site_libs/revealjs/plugin/math/mathjax2.js
@@ -0,0 +1,89 @@
+/**
+ * A plugin which enables rendering of math equations inside
+ * of reveal.js slides. Essentially a thin wrapper for MathJax.
+ *
+ * @author Hakim El Hattab
+ */
+export const MathJax2 = () => {
+
+ // The reveal.js instance this plugin is attached to
+ let deck;
+
+ let defaultOptions = {
+ messageStyle: 'none',
+ tex2jax: {
+ inlineMath: [ [ '$', '$' ], [ '\\(', '\\)' ] ],
+ skipTags: [ 'script', 'noscript', 'style', 'textarea', 'pre' ]
+ },
+ skipStartupTypeset: true
+ };
+
+ function loadScript( url, callback ) {
+
+ let head = document.querySelector( 'head' );
+ let script = document.createElement( 'script' );
+ script.type = 'text/javascript';
+ script.src = url;
+
+ // Wrapper for callback to make sure it only fires once
+ let finish = () => {
+ if( typeof callback === 'function' ) {
+ callback.call();
+ callback = null;
+ }
+ }
+
+ script.onload = finish;
+
+ // IE
+ script.onreadystatechange = () => {
+ if ( this.readyState === 'loaded' ) {
+ finish();
+ }
+ }
+
+ // Normal browsers
+ head.appendChild( script );
+
+ }
+
+ return {
+ id: 'mathjax2',
+
+ init: function( reveal ) {
+
+ deck = reveal;
+
+ let revealOptions = deck.getConfig().mathjax2 || deck.getConfig().math || {};
+
+ let options = { ...defaultOptions, ...revealOptions };
+ let mathjax = options.mathjax || 'https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js';
+ let config = options.config || 'TeX-AMS_HTML-full';
+ let url = mathjax + '?config=' + config;
+
+ options.tex2jax = { ...defaultOptions.tex2jax, ...revealOptions.tex2jax };
+
+ options.mathjax = options.config = null;
+
+ loadScript( url, function() {
+
+ MathJax.Hub.Config( options );
+
+ // Typeset followed by an immediate reveal.js layout since
+ // the typesetting process could affect slide height
+ MathJax.Hub.Queue( [ 'Typeset', MathJax.Hub, deck.getRevealElement() ] );
+ MathJax.Hub.Queue( deck.layout );
+
+ // Reprocess equations in slides when they turn visible
+ deck.on( 'slidechanged', function( event ) {
+
+ MathJax.Hub.Queue( [ 'Typeset', MathJax.Hub, event.currentSlide ] );
+
+ } );
+
+ } );
+
+ }
+ }
+
+};
diff --git a/_freeze/site_libs/revealjs/plugin/math/mathjax3.js b/_freeze/site_libs/revealjs/plugin/math/mathjax3.js
@@ -0,0 +1,77 @@
+/**
+ * A plugin which enables rendering of math equations inside
+ * of reveal.js slides. Essentially a thin wrapper for MathJax 3
+ *
+ * @author Hakim El Hattab
+ * @author Gerhard Burger
+ */
+export const MathJax3 = () => {
+
+ // The reveal.js instance this plugin is attached to
+ let deck;
+
+ let defaultOptions = {
+ tex: {
+ inlineMath: [ [ '$', '$' ], [ '\\(', '\\)' ] ]
+ },
+ options: {
+ skipHtmlTags: [ 'script', 'noscript', 'style', 'textarea', 'pre' ]
+ },
+ startup: {
+ ready: () => {
+ MathJax.startup.defaultReady();
+ MathJax.startup.promise.then(() => {
+ deck.layout();
+ });
+ }
+ }
+ };
+
+ function loadScript( url, callback ) {
+
+ let script = document.createElement( 'script' );
+ script.type = "text/javascript"
+ script.id = "MathJax-script"
+ script.src = url;
+ script.async = true
+
+ // Wrapper for callback to make sure it only fires once
+ script.onload = () => {
+ if (typeof callback === 'function') {
+ callback.call();
+ callback = null;
+ }
+ };
+
+ document.head.appendChild( script );
+
+ }
+
+ return {
+ id: 'mathjax3',
+ init: function(reveal) {
+
+ deck = reveal;
+
+ let revealOptions = deck.getConfig().mathjax3 || {};
+ let options = {...defaultOptions, ...revealOptions};
+ options.tex = {...defaultOptions.tex, ...revealOptions.tex}
+ options.options = {...defaultOptions.options, ...revealOptions.options}
+ options.startup = {...defaultOptions.startup, ...revealOptions.startup}
+
+ let url = options.mathjax || 'https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js';
+ options.mathjax = null;
+
+ window.MathJax = options;
+
+ loadScript( url, function() {
+ // Reprocess equations in slides when they turn visible
+ deck.addEventListener( 'slidechanged', function( event ) {
+ MathJax.typeset();
+ } );
+ } );
+
+ }
+ }
+
+};
diff --git a/_freeze/site_libs/revealjs/plugin/math/plugin.js b/_freeze/site_libs/revealjs/plugin/math/plugin.js
@@ -0,0 +1,15 @@
+import {KaTeX} from "./katex";
+import {MathJax2} from "./mathjax2";
+import {MathJax3} from "./mathjax3";
+
+const defaultTypesetter = MathJax2;
+
+/*!
+ * This plugin is a wrapper for the MathJax2,
+ * MathJax3 and KaTeX typesetter plugins.
+ */
+export default Plugin = Object.assign( defaultTypesetter(), {
+ KaTeX,
+ MathJax2,
+ MathJax3
+} );
+\ No newline at end of file
diff --git a/_freeze/site_libs/revealjs/plugin/notes/notes.esm.js b/_freeze/site_libs/revealjs/plugin/notes/notes.esm.js
@@ -0,0 +1 @@
+function t(){return{async:!1,baseUrl:null,breaks:!1,extensions:null,gfm:!0,headerIds:!0,headerPrefix:"",highlight:null,hooks:null,langPrefix:"language-",mangle:!0,pedantic:!1,renderer:null,sanitize:!1,sanitizer:null,silent:!1,smartypants:!1,tokenizer:null,walkTokens:null,xhtml:!1}}let e={async:!1,baseUrl:null,breaks:!1,extensions:null,gfm:!0,headerIds:!0,headerPrefix:"",highlight:null,hooks:null,langPrefix:"language-",mangle:!0,pedantic:!1,renderer:null,sanitize:!1,sanitizer:null,silent:!1,smartypants:!1,tokenizer:null,walkTokens:null,xhtml:!1};const n=/[&<>"']/,i=new RegExp(n.source,"g"),s=/[<>"']|&(?!(#\d{1,7}|#[Xx][a-fA-F0-9]{1,6}|\w+);)/,r=new RegExp(s.source,"g"),a={"&":"&","<":"<",">":">",'"':""","'":"'"},o=t=>a[t];function l(t,e){if(e){if(n.test(t))return t.replace(i,o)}else if(s.test(t))return t.replace(r,o);return t}const c=/&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/gi;function p(t){return t.replace(c,((t,e)=>"colon"===(e=e.toLowerCase())?":":"#"===e.charAt(0)?"x"===e.charAt(1)?String.fromCharCode(parseInt(e.substring(2),16)):String.fromCharCode(+e.substring(1)):""))}const u=/(^|[^\[])\^/g;function d(t,e){t="string"==typeof t?t:t.source,e=e||"";const n={replace:(e,i)=>(i=(i=i.source||i).replace(u,"$1"),t=t.replace(e,i),n),getRegex:()=>new RegExp(t,e)};return n}const h=/[^\w:]/g,g=/^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;function m(t,e,n){if(t){let t;try{t=decodeURIComponent(p(n)).replace(h,"").toLowerCase()}catch(t){return null}if(0===t.indexOf("javascript:")||0===t.indexOf("vbscript:")||0===t.indexOf("data:"))return null}e&&!g.test(n)&&(n=function(t,e){f[" "+t]||(k.test(t)?f[" "+t]=t+"/":f[" "+t]=v(t,"/",!0));t=f[" "+t];const n=-1===t.indexOf(":");return"//"===e.substring(0,2)?n?e:t.replace(w,"$1")+e:"/"===e.charAt(0)?n?e:t.replace(x,"$1")+e:t+e}(e,n));try{n=encodeURI(n).replace(/%25/g,"%")}catch(t){return null}return n}const 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$={escape:/^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,autolink:/^<(scheme:[^\s\x00-\x1f<>]*|email)>/,url:b,tag:"^comment|^</[a-zA-Z][\\w:-]*\\s*>|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>|^<\\?[\\s\\S]*?\\?>|^<![a-zA-Z]+\\s[\\s\\S]*?>|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>",link:/^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,reflink:/^!?\[(label)\]\[(ref)\]/,nolink:/^!?\[(ref)\](?:\[\])?/,reflinkSearch:"reflink|nolink(?!\\()",emStrong:{lDelim:/^(?:\*+(?:([punct_])|[^\s*]))|^_+(?:([punct*])|([^\s_]))/,rDelimAst:/^(?:[^_*\\]|\\.)*?\_\_(?:[^_*\\]|\\.)*?\*(?:[^_*\\]|\\.)*?(?=\_\_)|(?:[^*\\]|\\.)+(?=[^*])|[punct_](\*+)(?=[\s]|$)|(?:[^punct*_\s\\]|\\.)(\*+)(?=[punct_\s]|$)|[punct_\s](\*+)(?=[^punct*_\s])|[\s](\*+)(?=[punct_])|[punct_](\*+)(?=[punct_])|(?:[^punct*_\s\\]|\\.)(\*+)(?=[^punct*_\s])/,rDelimUnd:/^(?:[^_*\\]|\\.)*?\*\*(?:[^_*\\]|\\.)*?\_(?:[^_*\\]|\\.)*?(?=\*\*)|(?:[^_\\]|\\.)+(?=[^_])|[punct*](\_+)(?=[\s]|$)|(?:[^punct*_\s\\]|\\.)(\_+)(?=[punct*\s]|$)|[punct*\s](\_+)(?=[^punct*_\s])|[\s](\_+)(?=[punct*])|[punct*](\_+)(?=[punct*])/},code:/^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,br:/^( {2,}|\\)\n(?!\s*$)/,del:b,text:/^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*_]|\b_|$)|[^ ](?= {2,}\n)))/,punctuation:/^([\spunctuation])/};function E(t){return t.replace(/---/g,"—").replace(/--/g,"–").replace(/(^|[-\u2014/(\[{"\s])'/g,"$1‘").replace(/'/g,"’").replace(/(^|[-\u2014/(\[{\u2018\s])"/g,"$1“").replace(/"/g,"”").replace(/\.{3}/g,"…")}function A(t){let e,n,i="";const s=t.length;for(e=0;e<s;e++)n=t.charCodeAt(e),Math.random()>.5&&(n="x"+n.toString(16)),i+="&#"+n+";";return i}$._punctuation="!\"#$%&'()+\\-.,/:;<=>?@\\[\\]`^{|}~",$.punctuation=d($.punctuation).replace(/punctuation/g,$._punctuation).getRegex(),$.blockSkip=/\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g,$.escapedEmSt=/(?:^|[^\\])(?:\\\\)*\\[*_]/g,$._comment=d(z._comment).replace("(?:--\x3e|$)","--\x3e").getRegex(),$.emStrong.lDelim=d($.emStrong.lDelim).replace(/punct/g,$._punctuation).getRegex(),$.emStrong.rDelimAst=d($.emStrong.rDelimAst,"g").replace(/punct/g,$._punctuation).getRegex(),$.emStrong.rDelimUnd=d($.emStrong.rDelimUnd,"g").replace(/punct/g,$._punctuation).getRegex(),$._escapes=/\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g,$._scheme=/[a-zA-Z][a-zA-Z0-9+.-]{1,31}/,$._email=/[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/,$.autolink=d($.autolink).replace("scheme",$._scheme).replace("email",$._email).getRegex(),$._attribute=/\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/,$.tag=d($.tag).replace("comment",$._comment).replace("attribute",$._attribute).getRegex(),$._label=/(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/,$._href=/<(?:\\.|[^\n<>\\])+>|[^\s\x00-\x1f]*/,$._title=/"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/,$.link=d($.link).replace("label",$._label).replace("href",$._href).replace("title",$._title).getRegex(),$.reflink=d($.reflink).replace("label",$._label).replace("ref",z._label).getRegex(),$.nolink=d($.nolink).replace("ref",z._label).getRegex(),$.reflinkSearch=d($.reflinkSearch,"g").replace("reflink",$.reflink).replace("nolink",$.nolink).getRegex(),$.normal={...$},$.pedantic={...$.normal,strong:{start:/^__|\*\*/,middle:/^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,endAst:/\*\*(?!\*)/g,endUnd:/__(?!_)/g},em:{start:/^_|\*/,middle:/^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,endAst:/\*(?!\*)/g,endUnd:/_(?!_)/g},link:d(/^!?\[(label)\]\((.*?)\)/).replace("label",$._label).getRegex(),reflink:d(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace("label",$._label).getRegex()},$.gfm={...$.normal,escape:d($.escape).replace("])","~|])").getRegex(),_extended_email:/[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,url:/^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,_backpedal:/(?:[^?!.,:;*_'"~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_'"~)]+(?!$))+/,del:/^(~~?)(?=[^\s~])([\s\S]*?[^\s~])\1(?=[^~]|$)/,text:/^([`~]+|[^`~])(?:(?= {2,}\n)|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)|[\s\S]*?(?:(?=[\\<!\[`*~_]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)))/},$.gfm.url=d($.gfm.url,"i").replace("email",$.gfm._extended_email).getRegex(),$.breaks={...$.gfm,br:d($.br).replace("{2,}","*").getRegex(),text:d($.gfm.text).replace("\\b_","\\b_| {2,}\\n").replace(/\{2,\}/g,"*").getRegex()};class R{constructor(t){this.tokens=[],this.tokens.links=Object.create(null),this.options=t||e,this.options.tokenizer=this.options.tokenizer||new _,this.tokenizer=this.options.tokenizer,this.tokenizer.options=this.options,this.tokenizer.lexer=this,this.inlineQueue=[],this.state={inLink:!1,inRawBlock:!1,top:!0};const n={block:z.normal,inline:$.normal};this.options.pedantic?(n.block=z.pedantic,n.inline=$.pedantic):this.options.gfm&&(n.block=z.gfm,this.options.breaks?n.inline=$.breaks:n.inline=$.gfm),this.tokenizer.rules=n}static get rules(){return{block:z,inline:$}}static lex(t,e){return new R(e).lex(t)}static lexInline(t,e){return new R(e).inlineTokens(t)}lex(t){let e;for(t=t.replace(/\r\n|\r/g,"\n"),this.blockTokens(t,this.tokens);e=this.inlineQueue.shift();)this.inlineTokens(e.src,e.tokens);return this.tokens}blockTokens(t,e=[]){let n,i,s,r;for(t=this.options.pedantic?t.replace(/\t/g," ").replace(/^ +$/gm,""):t.replace(/^( *)(\t+)/gm,((t,e,n)=>e+" ".repeat(n.length)));t;)if(!(this.options.extensions&&this.options.extensions.block&&this.options.extensions.block.some((i=>!!(n=i.call({lexer:this},t,e))&&(t=t.substring(n.raw.length),e.push(n),!0)))))if(n=this.tokenizer.space(t))t=t.substring(n.raw.length),1===n.raw.length&&e.length>0?e[e.length-1].raw+="\n":e.push(n);else if(n=this.tokenizer.code(t))t=t.substring(n.raw.length),i=e[e.length-1],!i||"paragraph"!==i.type&&"text"!==i.type?e.push(n):(i.raw+="\n"+n.raw,i.text+="\n"+n.text,this.inlineQueue[this.inlineQueue.length-1].src=i.text);else if(n=this.tokenizer.fences(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.heading(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.hr(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.blockquote(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.list(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.html(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.def(t))t=t.substring(n.raw.length),i=e[e.length-1],!i||"paragraph"!==i.type&&"text"!==i.type?this.tokens.links[n.tag]||(this.tokens.links[n.tag]={href:n.href,title:n.title}):(i.raw+="\n"+n.raw,i.text+="\n"+n.raw,this.inlineQueue[this.inlineQueue.length-1].src=i.text);else if(n=this.tokenizer.table(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.lheading(t))t=t.substring(n.raw.length),e.push(n);else{if(s=t,this.options.extensions&&this.options.extensions.startBlock){let e=1/0;const n=t.slice(1);let i;this.options.extensions.startBlock.forEach((function(t){i=t.call({lexer:this},n),"number"==typeof i&&i>=0&&(e=Math.min(e,i))})),e<1/0&&e>=0&&(s=t.substring(0,e+1))}if(this.state.top&&(n=this.tokenizer.paragraph(s)))i=e[e.length-1],r&&"paragraph"===i.type?(i.raw+="\n"+n.raw,i.text+="\n"+n.text,this.inlineQueue.pop(),this.inlineQueue[this.inlineQueue.length-1].src=i.text):e.push(n),r=s.length!==t.length,t=t.substring(n.raw.length);else if(n=this.tokenizer.text(t))t=t.substring(n.raw.length),i=e[e.length-1],i&&"text"===i.type?(i.raw+="\n"+n.raw,i.text+="\n"+n.text,this.inlineQueue.pop(),this.inlineQueue[this.inlineQueue.length-1].src=i.text):e.push(n);else if(t){const e="Infinite loop on byte: "+t.charCodeAt(0);if(this.options.silent){console.error(e);break}throw new Error(e)}}return this.state.top=!0,e}inline(t,e=[]){return this.inlineQueue.push({src:t,tokens:e}),e}inlineTokens(t,e=[]){let n,i,s,r,a,o,l=t;if(this.tokens.links){const t=Object.keys(this.tokens.links);if(t.length>0)for(;null!=(r=this.tokenizer.rules.inline.reflinkSearch.exec(l));)t.includes(r[0].slice(r[0].lastIndexOf("[")+1,-1))&&(l=l.slice(0,r.index)+"["+S("a",r[0].length-2)+"]"+l.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex))}for(;null!=(r=this.tokenizer.rules.inline.blockSkip.exec(l));)l=l.slice(0,r.index)+"["+S("a",r[0].length-2)+"]"+l.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);for(;null!=(r=this.tokenizer.rules.inline.escapedEmSt.exec(l));)l=l.slice(0,r.index+r[0].length-2)+"++"+l.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex),this.tokenizer.rules.inline.escapedEmSt.lastIndex--;for(;t;)if(a||(o=""),a=!1,!(this.options.extensions&&this.options.extensions.inline&&this.options.extensions.inline.some((i=>!!(n=i.call({lexer:this},t,e))&&(t=t.substring(n.raw.length),e.push(n),!0)))))if(n=this.tokenizer.escape(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.tag(t))t=t.substring(n.raw.length),i=e[e.length-1],i&&"text"===n.type&&"text"===i.type?(i.raw+=n.raw,i.text+=n.text):e.push(n);else if(n=this.tokenizer.link(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.reflink(t,this.tokens.links))t=t.substring(n.raw.length),i=e[e.length-1],i&&"text"===n.type&&"text"===i.type?(i.raw+=n.raw,i.text+=n.text):e.push(n);else if(n=this.tokenizer.emStrong(t,l,o))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.codespan(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.br(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.del(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.autolink(t,A))t=t.substring(n.raw.length),e.push(n);else if(this.state.inLink||!(n=this.tokenizer.url(t,A))){if(s=t,this.options.extensions&&this.options.extensions.startInline){let e=1/0;const n=t.slice(1);let i;this.options.extensions.startInline.forEach((function(t){i=t.call({lexer:this},n),"number"==typeof i&&i>=0&&(e=Math.min(e,i))})),e<1/0&&e>=0&&(s=t.substring(0,e+1))}if(n=this.tokenizer.inlineText(s,E))t=t.substring(n.raw.length),"_"!==n.raw.slice(-1)&&(o=n.raw.slice(-1)),a=!0,i=e[e.length-1],i&&"text"===i.type?(i.raw+=n.raw,i.text+=n.text):e.push(n);else if(t){const e="Infinite loop on byte: "+t.charCodeAt(0);if(this.options.silent){console.error(e);break}throw new Error(e)}}else t=t.substring(n.raw.length),e.push(n);return e}}class L{constructor(t){this.options=t||e}code(t,e,n){const i=(e||"").match(/\S*/)[0];if(this.options.highlight){const e=this.options.highlight(t,i);null!=e&&e!==t&&(n=!0,t=e)}return t=t.replace(/\n$/,"")+"\n",i?'<pre><code class="'+this.options.langPrefix+l(i)+'">'+(n?t:l(t,!0))+"</code></pre>\n":"<pre><code>"+(n?t:l(t,!0))+"</code></pre>\n"}blockquote(t){return`<blockquote>\n${t}</blockquote>\n`}html(t){return t}heading(t,e,n,i){if(this.options.headerIds){return`<h${e} id="${this.options.headerPrefix+i.slug(n)}">${t}</h${e}>\n`}return`<h${e}>${t}</h${e}>\n`}hr(){return this.options.xhtml?"<hr/>\n":"<hr>\n"}list(t,e,n){const i=e?"ol":"ul";return"<"+i+(e&&1!==n?' start="'+n+'"':"")+">\n"+t+"</"+i+">\n"}listitem(t){return`<li>${t}</li>\n`}checkbox(t){return"<input "+(t?'checked="" ':"")+'disabled="" type="checkbox"'+(this.options.xhtml?" /":"")+"> "}paragraph(t){return`<p>${t}</p>\n`}table(t,e){return e&&(e=`<tbody>${e}</tbody>`),"<table>\n<thead>\n"+t+"</thead>\n"+e+"</table>\n"}tablerow(t){return`<tr>\n${t}</tr>\n`}tablecell(t,e){const n=e.header?"th":"td";return(e.align?`<${n} align="${e.align}">`:`<${n}>`)+t+`</${n}>\n`}strong(t){return`<strong>${t}</strong>`}em(t){return`<em>${t}</em>`}codespan(t){return`<code>${t}</code>`}br(){return this.options.xhtml?"<br/>":"<br>"}del(t){return`<del>${t}</del>`}link(t,e,n){if(null===(t=m(this.options.sanitize,this.options.baseUrl,t)))return n;let i='<a href="'+t+'"';return e&&(i+=' title="'+e+'"'),i+=">"+n+"</a>",i}image(t,e,n){if(null===(t=m(this.options.sanitize,this.options.baseUrl,t)))return n;let i=`<img src="${t}" alt="${n}"`;return e&&(i+=` title="${e}"`),i+=this.options.xhtml?"/>":">",i}text(t){return t}}class I{strong(t){return t}em(t){return t}codespan(t){return t}del(t){return t}html(t){return t}text(t){return t}link(t,e,n){return""+n}image(t,e,n){return""+n}br(){return""}}class M{constructor(){this.seen={}}serialize(t){return t.toLowerCase().trim().replace(/<[!\/a-z].*?>/gi,"").replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g,"").replace(/\s/g,"-")}getNextSafeSlug(t,e){let n=t,i=0;if(this.seen.hasOwnProperty(n)){i=this.seen[t];do{i++,n=t+"-"+i}while(this.seen.hasOwnProperty(n))}return e||(this.seen[t]=i,this.seen[n]=0),n}slug(t,e={}){const n=this.serialize(t);return this.getNextSafeSlug(n,e.dryrun)}}class C{constructor(t){this.options=t||e,this.options.renderer=this.options.renderer||new L,this.renderer=this.options.renderer,this.renderer.options=this.options,this.textRenderer=new I,this.slugger=new M}static parse(t,e){return new C(e).parse(t)}static parseInline(t,e){return new C(e).parseInline(t)}parse(t,e=!0){let n,i,s,r,a,o,l,c,u,d,h,g,m,f,k,w,x,b,y,v="";const S=t.length;for(n=0;n<S;n++)if(d=t[n],this.options.extensions&&this.options.extensions.renderers&&this.options.extensions.renderers[d.type]&&(y=this.options.extensions.renderers[d.type].call({parser:this},d),!1!==y||!["space","hr","heading","code","table","blockquote","list","html","paragraph","text"].includes(d.type)))v+=y||"";else switch(d.type){case"space":continue;case"hr":v+=this.renderer.hr();continue;case"heading":v+=this.renderer.heading(this.parseInline(d.tokens),d.depth,p(this.parseInline(d.tokens,this.textRenderer)),this.slugger);continue;case"code":v+=this.renderer.code(d.text,d.lang,d.escaped);continue;case"table":for(c="",l="",r=d.header.length,i=0;i<r;i++)l+=this.renderer.tablecell(this.parseInline(d.header[i].tokens),{header:!0,align:d.align[i]});for(c+=this.renderer.tablerow(l),u="",r=d.rows.length,i=0;i<r;i++){for(o=d.rows[i],l="",a=o.length,s=0;s<a;s++)l+=this.renderer.tablecell(this.parseInline(o[s].tokens),{header:!1,align:d.align[s]});u+=this.renderer.tablerow(l)}v+=this.renderer.table(c,u);continue;case"blockquote":u=this.parse(d.tokens),v+=this.renderer.blockquote(u);continue;case"list":for(h=d.ordered,g=d.start,m=d.loose,r=d.items.length,u="",i=0;i<r;i++)k=d.items[i],w=k.checked,x=k.task,f="",k.task&&(b=this.renderer.checkbox(w),m?k.tokens.length>0&&"paragraph"===k.tokens[0].type?(k.tokens[0].text=b+" "+k.tokens[0].text,k.tokens[0].tokens&&k.tokens[0].tokens.length>0&&"text"===k.tokens[0].tokens[0].type&&(k.tokens[0].tokens[0].text=b+" "+k.tokens[0].tokens[0].text)):k.tokens.unshift({type:"text",text:b}):f+=b),f+=this.parse(k.tokens,m),u+=this.renderer.listitem(f,x,w);v+=this.renderer.list(u,h,g);continue;case"html":v+=this.renderer.html(d.text);continue;case"paragraph":v+=this.renderer.paragraph(this.parseInline(d.tokens));continue;case"text":for(u=d.tokens?this.parseInline(d.tokens):d.text;n+1<S&&"text"===t[n+1].type;)d=t[++n],u+="\n"+(d.tokens?this.parseInline(d.tokens):d.text);v+=e?this.renderer.paragraph(u):u;continue;default:{const t='Token with "'+d.type+'" type was not found.';if(this.options.silent)return void console.error(t);throw new Error(t)}}return v}parseInline(t,e){e=e||this.renderer;let n,i,s,r="";const 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n},O.parseInline=P(R.lexInline,C.parseInline),O.Parser=C,O.parser=C.parse,O.Renderer=L,O.TextRenderer=I,O.Lexer=R,O.lexer=R.lex,O.Tokenizer=_,O.Slugger=M,O.Hooks=q,O.parse=O,O.options,O.setOptions,O.use,O.walkTokens,O.parseInline,C.parse,R.lex;const N=()=>{let t,e,n=null;function i(){if(n&&!n.closed)n.focus();else{if(n=window.open("about:blank","reveal.js - Notes","width=1100,height=700"),n.marked=O,n.document.write("\x3c!--\n\tNOTE: You need to build the notes plugin after making changes to this file.\n--\x3e\n<html lang=\"en\">\n\t<head>\n\t\t<meta charset=\"utf-8\">\n\n\t\t<title>reveal.js - Speaker View</title>\n\n\t\t<style>\n\t\t\tbody {\n\t\t\t\tfont-family: Helvetica;\n\t\t\t\tfont-size: 18px;\n\t\t\t}\n\n\t\t\t#current-slide,\n\t\t\t#upcoming-slide,\n\t\t\t#speaker-controls {\n\t\t\t\tpadding: 6px;\n\t\t\t\tbox-sizing: border-box;\n\t\t\t\t-moz-box-sizing: border-box;\n\t\t\t}\n\n\t\t\t#current-slide iframe,\n\t\t\t#upcoming-slide iframe {\n\t\t\t\twidth: 100%;\n\t\t\t\theight: 100%;\n\t\t\t\tborder: 1px solid #ddd;\n\t\t\t}\n\n\t\t\t#current-slide .label,\n\t\t\t#upcoming-slide .label {\n\t\t\t\tposition: absolute;\n\t\t\t\ttop: 10px;\n\t\t\t\tleft: 10px;\n\t\t\t\tz-index: 2;\n\t\t\t}\n\n\t\t\t#connection-status {\n\t\t\t\tposition: absolute;\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 0;\n\t\t\t\twidth: 100%;\n\t\t\t\theight: 100%;\n\t\t\t\tz-index: 20;\n\t\t\t\tpadding: 30% 20% 20% 20%;\n\t\t\t\tfont-size: 18px;\n\t\t\t\tcolor: #222;\n\t\t\t\tbackground: #fff;\n\t\t\t\ttext-align: center;\n\t\t\t\tbox-sizing: border-box;\n\t\t\t\tline-height: 1.4;\n\t\t\t}\n\n\t\t\t.overlay-element {\n\t\t\t\theight: 34px;\n\t\t\t\tline-height: 34px;\n\t\t\t\tpadding: 0 10px;\n\t\t\t\ttext-shadow: none;\n\t\t\t\tbackground: rgba( 220, 220, 220, 0.8 );\n\t\t\t\tcolor: #222;\n\t\t\t\tfont-size: 14px;\n\t\t\t}\n\n\t\t\t.overlay-element.interactive:hover {\n\t\t\t\tbackground: rgba( 220, 220, 220, 1 );\n\t\t\t}\n\n\t\t\t#current-slide {\n\t\t\t\tposition: absolute;\n\t\t\t\twidth: 60%;\n\t\t\t\theight: 100%;\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 0;\n\t\t\t\tpadding-right: 0;\n\t\t\t}\n\n\t\t\t#upcoming-slide {\n\t\t\t\tposition: absolute;\n\t\t\t\twidth: 40%;\n\t\t\t\theight: 40%;\n\t\t\t\tright: 0;\n\t\t\t\ttop: 0;\n\t\t\t}\n\n\t\t\t/* Speaker controls */\n\t\t\t#speaker-controls {\n\t\t\t\tposition: absolute;\n\t\t\t\ttop: 40%;\n\t\t\t\tright: 0;\n\t\t\t\twidth: 40%;\n\t\t\t\theight: 60%;\n\t\t\t\toverflow: auto;\n\t\t\t\tfont-size: 18px;\n\t\t\t}\n\n\t\t\t\t.speaker-controls-time.hidden,\n\t\t\t\t.speaker-controls-notes.hidden {\n\t\t\t\t\tdisplay: none;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .label,\n\t\t\t\t.speaker-controls-pace .label,\n\t\t\t\t.speaker-controls-notes .label {\n\t\t\t\t\ttext-transform: uppercase;\n\t\t\t\t\tfont-weight: normal;\n\t\t\t\t\tfont-size: 0.66em;\n\t\t\t\t\tcolor: #666;\n\t\t\t\t\tmargin: 0;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time, .speaker-controls-pace {\n\t\t\t\t\tborder-bottom: 1px solid rgba( 200, 200, 200, 0.5 );\n\t\t\t\t\tmargin-bottom: 10px;\n\t\t\t\t\tpadding: 10px 16px;\n\t\t\t\t\tpadding-bottom: 20px;\n\t\t\t\t\tcursor: pointer;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .reset-button {\n\t\t\t\t\topacity: 0;\n\t\t\t\t\tfloat: right;\n\t\t\t\t\tcolor: #666;\n\t\t\t\t\ttext-decoration: none;\n\t\t\t\t}\n\t\t\t\t.speaker-controls-time:hover .reset-button {\n\t\t\t\t\topacity: 1;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .timer,\n\t\t\t\t.speaker-controls-time .clock {\n\t\t\t\t\twidth: 50%;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .timer,\n\t\t\t\t.speaker-controls-time .clock,\n\t\t\t\t.speaker-controls-time .pacing .hours-value,\n\t\t\t\t.speaker-controls-time .pacing .minutes-value,\n\t\t\t\t.speaker-controls-time .pacing .seconds-value {\n\t\t\t\t\tfont-size: 1.9em;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .timer {\n\t\t\t\t\tfloat: left;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .clock {\n\t\t\t\t\tfloat: right;\n\t\t\t\t\ttext-align: right;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time span.mute {\n\t\t\t\t\topacity: 0.3;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .pacing-title {\n\t\t\t\t\tmargin-top: 5px;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .pacing.ahead {\n\t\t\t\t\tcolor: blue;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .pacing.on-track {\n\t\t\t\t\tcolor: green;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .pacing.behind {\n\t\t\t\t\tcolor: red;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-notes {\n\t\t\t\t\tpadding: 10px 16px;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-notes .value {\n\t\t\t\t\tmargin-top: 5px;\n\t\t\t\t\tline-height: 1.4;\n\t\t\t\t\tfont-size: 1.2em;\n\t\t\t\t}\n\n\t\t\t/* Layout selector */\n\t\t\t#speaker-layout {\n\t\t\t\tposition: absolute;\n\t\t\t\ttop: 10px;\n\t\t\t\tright: 10px;\n\t\t\t\tcolor: #222;\n\t\t\t\tz-index: 10;\n\t\t\t}\n\t\t\t\t#speaker-layout select {\n\t\t\t\t\tposition: absolute;\n\t\t\t\t\twidth: 100%;\n\t\t\t\t\theight: 100%;\n\t\t\t\t\ttop: 0;\n\t\t\t\t\tleft: 0;\n\t\t\t\t\tborder: 0;\n\t\t\t\t\tbox-shadow: 0;\n\t\t\t\t\tcursor: pointer;\n\t\t\t\t\topacity: 0;\n\n\t\t\t\t\tfont-size: 1em;\n\t\t\t\t\tbackground-color: transparent;\n\n\t\t\t\t\t-moz-appearance: none;\n\t\t\t\t\t-webkit-appearance: none;\n\t\t\t\t\t-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\n\t\t\t\t}\n\n\t\t\t\t#speaker-layout select:focus {\n\t\t\t\t\toutline: none;\n\t\t\t\t\tbox-shadow: none;\n\t\t\t\t}\n\n\t\t\t.clear {\n\t\t\t\tclear: both;\n\t\t\t}\n\n\t\t\t/* Speaker layout: Wide */\n\t\t\tbody[data-speaker-layout=\"wide\"] #current-slide,\n\t\t\tbody[data-speaker-layout=\"wide\"] #upcoming-slide {\n\t\t\t\twidth: 50%;\n\t\t\t\theight: 45%;\n\t\t\t\tpadding: 6px;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"wide\"] #current-slide {\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 0;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"wide\"] #upcoming-slide {\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 50%;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"wide\"] #speaker-controls {\n\t\t\t\ttop: 45%;\n\t\t\t\tleft: 0;\n\t\t\t\twidth: 100%;\n\t\t\t\theight: 50%;\n\t\t\t\tfont-size: 1.25em;\n\t\t\t}\n\n\t\t\t/* Speaker layout: Tall */\n\t\t\tbody[data-speaker-layout=\"tall\"] #current-slide,\n\t\t\tbody[data-speaker-layout=\"tall\"] #upcoming-slide {\n\t\t\t\twidth: 45%;\n\t\t\t\theight: 50%;\n\t\t\t\tpadding: 6px;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"tall\"] #current-slide {\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 0;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"tall\"] #upcoming-slide {\n\t\t\t\ttop: 50%;\n\t\t\t\tleft: 0;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"tall\"] #speaker-controls {\n\t\t\t\tpadding-top: 40px;\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 45%;\n\t\t\t\twidth: 55%;\n\t\t\t\theight: 100%;\n\t\t\t\tfont-size: 1.25em;\n\t\t\t}\n\n\t\t\t/* Speaker layout: Notes only */\n\t\t\tbody[data-speaker-layout=\"notes-only\"] #current-slide,\n\t\t\tbody[data-speaker-layout=\"notes-only\"] #upcoming-slide {\n\t\t\t\tdisplay: none;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"notes-only\"] #speaker-controls {\n\t\t\t\tpadding-top: 40px;\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 0;\n\t\t\t\twidth: 100%;\n\t\t\t\theight: 100%;\n\t\t\t\tfont-size: 1.25em;\n\t\t\t}\n\n\t\t\t@media screen and (max-width: 1080px) {\n\t\t\t\tbody[data-speaker-layout=\"default\"] #speaker-controls {\n\t\t\t\t\tfont-size: 16px;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t@media screen and (max-width: 900px) {\n\t\t\t\tbody[data-speaker-layout=\"default\"] #speaker-controls {\n\t\t\t\t\tfont-size: 14px;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t@media screen and (max-width: 800px) {\n\t\t\t\tbody[data-speaker-layout=\"default\"] #speaker-controls {\n\t\t\t\t\tfont-size: 12px;\n\t\t\t\t}\n\t\t\t}\n\n\t\t</style>\n\t</head>\n\n\t<body>\n\n\t\t<div id=\"connection-status\">Loading speaker view...</div>\n\n\t\t<div id=\"current-slide\"></div>\n\t\t<div id=\"upcoming-slide\"><span class=\"overlay-element label\">Upcoming</span></div>\n\t\t<div id=\"speaker-controls\">\n\t\t\t<div class=\"speaker-controls-time\">\n\t\t\t\t<h4 class=\"label\">Time <span class=\"reset-button\">Click to Reset</span></h4>\n\t\t\t\t<div class=\"clock\">\n\t\t\t\t\t<span class=\"clock-value\">0:00 AM</span>\n\t\t\t\t</div>\n\t\t\t\t<div class=\"timer\">\n\t\t\t\t\t<span class=\"hours-value\">00</span><span class=\"minutes-value\">:00</span><span class=\"seconds-value\">:00</span>\n\t\t\t\t</div>\n\t\t\t\t<div class=\"clear\"></div>\n\n\t\t\t\t<h4 class=\"label pacing-title\" style=\"display: none\">Pacing – Time to finish current slide</h4>\n\t\t\t\t<div class=\"pacing\" style=\"display: none\">\n\t\t\t\t\t<span class=\"hours-value\">00</span><span class=\"minutes-value\">:00</span><span class=\"seconds-value\">:00</span>\n\t\t\t\t</div>\n\t\t\t</div>\n\n\t\t\t<div class=\"speaker-controls-notes hidden\">\n\t\t\t\t<h4 class=\"label\">Notes</h4>\n\t\t\t\t<div class=\"value\"></div>\n\t\t\t</div>\n\t\t</div>\n\t\t<div id=\"speaker-layout\" class=\"overlay-element interactive\">\n\t\t\t<span class=\"speaker-layout-label\"></span>\n\t\t\t<select class=\"speaker-layout-dropdown\"></select>\n\t\t</div>\n\n\t\t<script>\n\n\t\t\t(function() {\n\n\t\t\t\tvar notes,\n\t\t\t\t\tnotesValue,\n\t\t\t\t\tcurrentState,\n\t\t\t\t\tcurrentSlide,\n\t\t\t\t\tupcomingSlide,\n\t\t\t\t\tlayoutLabel,\n\t\t\t\t\tlayoutDropdown,\n\t\t\t\t\tpendingCalls = {},\n\t\t\t\t\tlastRevealApiCallId = 0,\n\t\t\t\t\tconnected = false\n\n\t\t\t\tvar connectionStatus = document.querySelector( '#connection-status' );\n\n\t\t\t\tvar SPEAKER_LAYOUTS = {\n\t\t\t\t\t'default': 'Default',\n\t\t\t\t\t'wide': 'Wide',\n\t\t\t\t\t'tall': 'Tall',\n\t\t\t\t\t'notes-only': 'Notes only'\n\t\t\t\t};\n\n\t\t\t\tsetupLayout();\n\n\t\t\t\tlet openerOrigin;\n\n\t\t\t\ttry {\n\t\t\t\t\topenerOrigin = window.opener.location.origin;\n\t\t\t\t}\n\t\t\t\tcatch ( error ) { console.warn( error ) }\n\n\t\t\t\t// In order to prevent XSS, the speaker view will only run if its\n\t\t\t\t// opener has the same origin as itself\n\t\t\t\tif( window.location.origin !== openerOrigin ) {\n\t\t\t\t\tconnectionStatus.innerHTML = 'Cross origin error.<br>The speaker window can only be opened from the same origin.';\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tvar connectionTimeout = setTimeout( function() {\n\t\t\t\t\tconnectionStatus.innerHTML = 'Error connecting to main window.<br>Please try closing and reopening the speaker view.';\n\t\t\t\t}, 5000 );\n\n\t\t\t\twindow.addEventListener( 'message', function( event ) {\n\n\t\t\t\t\t// Validate the origin of all messages to avoid parsing messages\n\t\t\t\t\t// that aren't meant for us. Ignore when running off file:// so\n\t\t\t\t\t// that the speaker view continues to work without a web server.\n\t\t\t\t\tif( window.location.origin !== event.origin && window.location.origin !== 'file://' ) {\n\t\t\t\t\t\treturn\n\t\t\t\t\t}\n\n\t\t\t\t\tclearTimeout( connectionTimeout );\n\t\t\t\t\tconnectionStatus.style.display = 'none';\n\n\t\t\t\t\tvar data = JSON.parse( event.data );\n\n\t\t\t\t\t// The overview mode is only useful to the reveal.js instance\n\t\t\t\t\t// where navigation occurs so we don't sync it\n\t\t\t\t\tif( data.state ) delete data.state.overview;\n\n\t\t\t\t\t// Messages sent by the notes plugin inside of the main window\n\t\t\t\t\tif( data && data.namespace === 'reveal-notes' ) {\n\t\t\t\t\t\tif( data.type === 'connect' ) {\n\t\t\t\t\t\t\thandleConnectMessage( data );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse if( data.type === 'state' ) {\n\t\t\t\t\t\t\thandleStateMessage( data );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse if( data.type === 'return' ) {\n\t\t\t\t\t\t\tpendingCalls[data.callId](data.result);\n\t\t\t\t\t\t\tdelete pendingCalls[data.callId];\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\t// Messages sent by the reveal.js inside of the current slide preview\n\t\t\t\t\telse if( data && data.namespace === 'reveal' ) {\n\t\t\t\t\t\tif( /ready/.test( data.eventName ) ) {\n\t\t\t\t\t\t\t// Send a message back to notify that the handshake is complete\n\t\t\t\t\t\t\twindow.opener.postMessage( JSON.stringify({ namespace: 'reveal-notes', type: 'connected'} ), '*' );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse if( /slidechanged|fragmentshown|fragmenthidden|paused|resumed/.test( data.eventName ) && currentState !== JSON.stringify( data.state ) ) {\n\n\t\t\t\t\t\t\tdispatchStateToMainWindow( data.state );\n\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\n\t\t\t\t/**\n\t\t\t\t * Updates the presentation in the main window to match the state\n\t\t\t\t * of the presentation in the notes window.\n\t\t\t\t */\n\t\t\t\tconst dispatchStateToMainWindow = debounce(( state ) => {\n\t\t\t\t\twindow.opener.postMessage( JSON.stringify({ method: 'setState', args: [ state ]} ), '*' );\n\t\t\t\t}, 500);\n\n\t\t\t\t/**\n\t\t\t\t * Asynchronously calls the Reveal.js API of the main frame.\n\t\t\t\t */\n\t\t\t\tfunction callRevealApi( methodName, methodArguments, callback ) {\n\n\t\t\t\t\tvar callId = ++lastRevealApiCallId;\n\t\t\t\t\tpendingCalls[callId] = callback;\n\t\t\t\t\twindow.opener.postMessage( JSON.stringify( {\n\t\t\t\t\t\tnamespace: 'reveal-notes',\n\t\t\t\t\t\ttype: 'call',\n\t\t\t\t\t\tcallId: callId,\n\t\t\t\t\t\tmethodName: methodName,\n\t\t\t\t\t\targuments: methodArguments\n\t\t\t\t\t} ), '*' );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Called when the main window is trying to establish a\n\t\t\t\t * connection.\n\t\t\t\t */\n\t\t\t\tfunction handleConnectMessage( data ) {\n\n\t\t\t\t\tif( connected === false ) {\n\t\t\t\t\t\tconnected = true;\n\n\t\t\t\t\t\tsetupIframes( data );\n\t\t\t\t\t\tsetupKeyboard();\n\t\t\t\t\t\tsetupNotes();\n\t\t\t\t\t\tsetupTimer();\n\t\t\t\t\t\tsetupHeartbeat();\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Called when the main window sends an updated state.\n\t\t\t\t */\n\t\t\t\tfunction handleStateMessage( data ) {\n\n\t\t\t\t\t// Store the most recently set state to avoid circular loops\n\t\t\t\t\t// applying the same state\n\t\t\t\t\tcurrentState = JSON.stringify( data.state );\n\n\t\t\t\t\t// No need for updating the notes in case of fragment changes\n\t\t\t\t\tif ( data.notes ) {\n\t\t\t\t\t\tnotes.classList.remove( 'hidden' );\n\t\t\t\t\t\tnotesValue.style.whiteSpace = data.whitespace;\n\t\t\t\t\t\tif( data.markdown ) {\n\t\t\t\t\t\t\tnotesValue.innerHTML = marked( data.notes );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tnotesValue.innerHTML = data.notes;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tnotes.classList.add( 'hidden' );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Update the note slides\n\t\t\t\t\tcurrentSlide.contentWindow.postMessage( JSON.stringify({ method: 'setState', args: [ data.state ] }), '*' );\n\t\t\t\t\tupcomingSlide.contentWindow.postMessage( JSON.stringify({ method: 'setState', args: [ data.state ] }), '*' );\n\t\t\t\t\tupcomingSlide.contentWindow.postMessage( JSON.stringify({ method: 'next' }), '*' );\n\n\t\t\t\t}\n\n\t\t\t\t// Limit to max one state update per X ms\n\t\t\t\thandleStateMessage = debounce( handleStateMessage, 200 );\n\n\t\t\t\t/**\n\t\t\t\t * Forward keyboard events to the current slide window.\n\t\t\t\t * This enables keyboard events to work even if focus\n\t\t\t\t * isn't set on the current slide iframe.\n\t\t\t\t *\n\t\t\t\t * Block F5 default handling, it reloads and disconnects\n\t\t\t\t * the speaker notes window.\n\t\t\t\t */\n\t\t\t\tfunction setupKeyboard() {\n\n\t\t\t\t\tdocument.addEventListener( 'keydown', function( event ) {\n\t\t\t\t\t\tif( event.keyCode === 116 || ( event.metaKey && event.keyCode === 82 ) ) {\n\t\t\t\t\t\t\tevent.preventDefault();\n\t\t\t\t\t\t\treturn false;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tcurrentSlide.contentWindow.postMessage( JSON.stringify({ method: 'triggerKey', args: [ event.keyCode ] }), '*' );\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Creates the preview iframes.\n\t\t\t\t */\n\t\t\t\tfunction setupIframes( data ) {\n\n\t\t\t\t\tvar params = [\n\t\t\t\t\t\t'receiver',\n\t\t\t\t\t\t'progress=false',\n\t\t\t\t\t\t'history=false',\n\t\t\t\t\t\t'transition=none',\n\t\t\t\t\t\t'autoSlide=0',\n\t\t\t\t\t\t'backgroundTransition=none'\n\t\t\t\t\t].join( '&' );\n\n\t\t\t\t\tvar urlSeparator = /\\?/.test(data.url) ? '&' : '?';\n\t\t\t\t\tvar hash = '#/' + data.state.indexh + '/' + data.state.indexv;\n\t\t\t\t\tvar currentURL = data.url + urlSeparator + params + '&scrollActivationWidth=false&postMessageEvents=true' + hash;\n\t\t\t\t\tvar upcomingURL = data.url + urlSeparator + params + '&scrollActivationWidth=false&controls=false' + hash;\n\n\t\t\t\t\tcurrentSlide = document.createElement( 'iframe' );\n\t\t\t\t\tcurrentSlide.setAttribute( 'width', 1280 );\n\t\t\t\t\tcurrentSlide.setAttribute( 'height', 1024 );\n\t\t\t\t\tcurrentSlide.setAttribute( 'src', currentURL );\n\t\t\t\t\tdocument.querySelector( '#current-slide' ).appendChild( currentSlide );\n\n\t\t\t\t\tupcomingSlide = document.createElement( 'iframe' );\n\t\t\t\t\tupcomingSlide.setAttribute( 'width', 640 );\n\t\t\t\t\tupcomingSlide.setAttribute( 'height', 512 );\n\t\t\t\t\tupcomingSlide.setAttribute( 'src', upcomingURL );\n\t\t\t\t\tdocument.querySelector( '#upcoming-slide' ).appendChild( upcomingSlide );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Setup the notes UI.\n\t\t\t\t */\n\t\t\t\tfunction setupNotes() {\n\n\t\t\t\t\tnotes = document.querySelector( '.speaker-controls-notes' );\n\t\t\t\t\tnotesValue = document.querySelector( '.speaker-controls-notes .value' );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * We send out a heartbeat at all times to ensure we can\n\t\t\t\t * reconnect with the main presentation window after reloads.\n\t\t\t\t */\n\t\t\t\tfunction setupHeartbeat() {\n\n\t\t\t\t\tsetInterval( () => {\n\t\t\t\t\t\twindow.opener.postMessage( JSON.stringify({ namespace: 'reveal-notes', type: 'heartbeat'} ), '*' );\n\t\t\t\t\t}, 1000 );\n\n\t\t\t\t}\n\n\t\t\t\tfunction getTimings( callback ) {\n\n\t\t\t\t\tcallRevealApi( 'getSlidesAttributes', [], function ( slideAttributes ) {\n\t\t\t\t\t\tcallRevealApi( 'getConfig', [], function ( config ) {\n\t\t\t\t\t\t\tvar totalTime = config.totalTime;\n\t\t\t\t\t\t\tvar minTimePerSlide = config.minimumTimePerSlide || 0;\n\t\t\t\t\t\t\tvar defaultTiming = config.defaultTiming;\n\t\t\t\t\t\t\tif ((defaultTiming == null) && (totalTime == null)) {\n\t\t\t\t\t\t\t\tcallback(null);\n\t\t\t\t\t\t\t\treturn;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t// Setting totalTime overrides defaultTiming\n\t\t\t\t\t\t\tif (totalTime) {\n\t\t\t\t\t\t\t\tdefaultTiming = 0;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\tvar timings = [];\n\t\t\t\t\t\t\tfor ( var i in slideAttributes ) {\n\t\t\t\t\t\t\t\tvar slide = slideAttributes[ i ];\n\t\t\t\t\t\t\t\tvar timing = defaultTiming;\n\t\t\t\t\t\t\t\tif( slide.hasOwnProperty( 'data-timing' )) {\n\t\t\t\t\t\t\t\t\tvar t = slide[ 'data-timing' ];\n\t\t\t\t\t\t\t\t\ttiming = parseInt(t);\n\t\t\t\t\t\t\t\t\tif( isNaN(timing) ) {\n\t\t\t\t\t\t\t\t\t\tconsole.warn(\"Could not parse timing '\" + t + \"' of slide \" + i + \"; using default of \" + defaultTiming);\n\t\t\t\t\t\t\t\t\t\ttiming = defaultTiming;\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\ttimings.push(timing);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\tif ( totalTime ) {\n\t\t\t\t\t\t\t\t// After we've allocated time to individual slides, we summarize it and\n\t\t\t\t\t\t\t\t// subtract it from the total time\n\t\t\t\t\t\t\t\tvar remainingTime = totalTime - timings.reduce( function(a, b) { return a + b; }, 0 );\n\t\t\t\t\t\t\t\t// The remaining time is divided by the number of slides that have 0 seconds\n\t\t\t\t\t\t\t\t// allocated at the moment, giving the average time-per-slide on the remaining slides\n\t\t\t\t\t\t\t\tvar remainingSlides = (timings.filter( function(x) { return x == 0 }) ).length\n\t\t\t\t\t\t\t\tvar timePerSlide = Math.round( remainingTime / remainingSlides, 0 )\n\t\t\t\t\t\t\t\t// And now we replace every zero-value timing with that average\n\t\t\t\t\t\t\t\ttimings = timings.map( function(x) { return (x==0 ? timePerSlide : x) } );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\tvar slidesUnderMinimum = timings.filter( function(x) { return (x < minTimePerSlide) } ).length\n\t\t\t\t\t\t\tif ( slidesUnderMinimum ) {\n\t\t\t\t\t\t\t\tmessage = \"The pacing time for \" + slidesUnderMinimum + \" slide(s) is under the configured minimum of \" + minTimePerSlide + \" seconds. Check the data-timing attribute on individual slides, or consider increasing the totalTime or minimumTimePerSlide configuration options (or removing some slides).\";\n\t\t\t\t\t\t\t\talert(message);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\tcallback( timings );\n\t\t\t\t\t\t} );\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Return the number of seconds allocated for presenting\n\t\t\t\t * all slides up to and including this one.\n\t\t\t\t */\n\t\t\t\tfunction getTimeAllocated( timings, callback ) {\n\n\t\t\t\t\tcallRevealApi( 'getSlidePastCount', [], function ( currentSlide ) {\n\t\t\t\t\t\tvar allocated = 0;\n\t\t\t\t\t\tfor (var i in timings.slice(0, currentSlide + 1)) {\n\t\t\t\t\t\t\tallocated += timings[i];\n\t\t\t\t\t\t}\n\t\t\t\t\t\tcallback( allocated );\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Create the timer and clock and start updating them\n\t\t\t\t * at an interval.\n\t\t\t\t */\n\t\t\t\tfunction setupTimer() {\n\n\t\t\t\t\tvar start = new Date(),\n\t\t\t\t\ttimeEl = document.querySelector( '.speaker-controls-time' ),\n\t\t\t\t\tclockEl = timeEl.querySelector( '.clock-value' ),\n\t\t\t\t\thoursEl = timeEl.querySelector( '.hours-value' ),\n\t\t\t\t\tminutesEl = timeEl.querySelector( '.minutes-value' ),\n\t\t\t\t\tsecondsEl = timeEl.querySelector( '.seconds-value' ),\n\t\t\t\t\tpacingTitleEl = timeEl.querySelector( '.pacing-title' ),\n\t\t\t\t\tpacingEl = timeEl.querySelector( '.pacing' ),\n\t\t\t\t\tpacingHoursEl = pacingEl.querySelector( '.hours-value' ),\n\t\t\t\t\tpacingMinutesEl = pacingEl.querySelector( '.minutes-value' ),\n\t\t\t\t\tpacingSecondsEl = pacingEl.querySelector( '.seconds-value' );\n\n\t\t\t\t\tvar timings = null;\n\t\t\t\t\tgetTimings( function ( _timings ) {\n\n\t\t\t\t\t\ttimings = _timings;\n\t\t\t\t\t\tif (_timings !== null) {\n\t\t\t\t\t\t\tpacingTitleEl.style.removeProperty('display');\n\t\t\t\t\t\t\tpacingEl.style.removeProperty('display');\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// Update once directly\n\t\t\t\t\t\t_updateTimer();\n\n\t\t\t\t\t\t// Then update every second\n\t\t\t\t\t\tsetInterval( _updateTimer, 1000 );\n\n\t\t\t\t\t} );\n\n\n\t\t\t\t\tfunction _resetTimer() {\n\n\t\t\t\t\t\tif (timings == null) {\n\t\t\t\t\t\t\tstart = new Date();\n\t\t\t\t\t\t\t_updateTimer();\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\t// Reset timer to beginning of current slide\n\t\t\t\t\t\t\tgetTimeAllocated( timings, function ( slideEndTimingSeconds ) {\n\t\t\t\t\t\t\t\tvar slideEndTiming = slideEndTimingSeconds * 1000;\n\t\t\t\t\t\t\t\tcallRevealApi( 'getSlidePastCount', [], function ( currentSlide ) {\n\t\t\t\t\t\t\t\t\tvar currentSlideTiming = timings[currentSlide] * 1000;\n\t\t\t\t\t\t\t\t\tvar previousSlidesTiming = slideEndTiming - currentSlideTiming;\n\t\t\t\t\t\t\t\t\tvar now = new Date();\n\t\t\t\t\t\t\t\t\tstart = new Date(now.getTime() - previousSlidesTiming);\n\t\t\t\t\t\t\t\t\t_updateTimer();\n\t\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t\ttimeEl.addEventListener( 'click', function() {\n\t\t\t\t\t\t_resetTimer();\n\t\t\t\t\t\treturn false;\n\t\t\t\t\t} );\n\n\t\t\t\t\tfunction _displayTime( hrEl, minEl, secEl, time) {\n\n\t\t\t\t\t\tvar sign = Math.sign(time) == -1 ? \"-\" : \"\";\n\t\t\t\t\t\ttime = Math.abs(Math.round(time / 1000));\n\t\t\t\t\t\tvar seconds = time % 60;\n\t\t\t\t\t\tvar minutes = Math.floor( time / 60 ) % 60 ;\n\t\t\t\t\t\tvar hours = Math.floor( time / ( 60 * 60 )) ;\n\t\t\t\t\t\thrEl.innerHTML = sign + zeroPadInteger( hours );\n\t\t\t\t\t\tif (hours == 0) {\n\t\t\t\t\t\t\thrEl.classList.add( 'mute' );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\thrEl.classList.remove( 'mute' );\n\t\t\t\t\t\t}\n\t\t\t\t\t\tminEl.innerHTML = ':' + zeroPadInteger( minutes );\n\t\t\t\t\t\tif (hours == 0 && minutes == 0) {\n\t\t\t\t\t\t\tminEl.classList.add( 'mute' );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tminEl.classList.remove( 'mute' );\n\t\t\t\t\t\t}\n\t\t\t\t\t\tsecEl.innerHTML = ':' + zeroPadInteger( seconds );\n\t\t\t\t\t}\n\n\t\t\t\t\tfunction _updateTimer() {\n\n\t\t\t\t\t\tvar diff, hours, minutes, seconds,\n\t\t\t\t\t\tnow = new Date();\n\n\t\t\t\t\t\tdiff = now.getTime() - start.getTime();\n\n\t\t\t\t\t\tclockEl.innerHTML = now.toLocaleTimeString( 'en-US', { hour12: true, hour: '2-digit', minute:'2-digit' } );\n\t\t\t\t\t\t_displayTime( hoursEl, minutesEl, secondsEl, diff );\n\t\t\t\t\t\tif (timings !== null) {\n\t\t\t\t\t\t\t_updatePacing(diff);\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t\tfunction _updatePacing(diff) {\n\n\t\t\t\t\t\tgetTimeAllocated( timings, function ( slideEndTimingSeconds ) {\n\t\t\t\t\t\t\tvar slideEndTiming = slideEndTimingSeconds * 1000;\n\n\t\t\t\t\t\t\tcallRevealApi( 'getSlidePastCount', [], function ( currentSlide ) {\n\t\t\t\t\t\t\t\tvar currentSlideTiming = timings[currentSlide] * 1000;\n\t\t\t\t\t\t\t\tvar timeLeftCurrentSlide = slideEndTiming - diff;\n\t\t\t\t\t\t\t\tif (timeLeftCurrentSlide < 0) {\n\t\t\t\t\t\t\t\t\tpacingEl.className = 'pacing behind';\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\telse if (timeLeftCurrentSlide < currentSlideTiming) {\n\t\t\t\t\t\t\t\t\tpacingEl.className = 'pacing on-track';\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\telse {\n\t\t\t\t\t\t\t\t\tpacingEl.className = 'pacing ahead';\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t_displayTime( pacingHoursEl, pacingMinutesEl, pacingSecondsEl, timeLeftCurrentSlide );\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t} );\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Sets up the speaker view layout and layout selector.\n\t\t\t\t */\n\t\t\t\tfunction setupLayout() {\n\n\t\t\t\t\tlayoutDropdown = document.querySelector( '.speaker-layout-dropdown' );\n\t\t\t\t\tlayoutLabel = document.querySelector( '.speaker-layout-label' );\n\n\t\t\t\t\t// Render the list of available layouts\n\t\t\t\t\tfor( var id in SPEAKER_LAYOUTS ) {\n\t\t\t\t\t\tvar option = document.createElement( 'option' );\n\t\t\t\t\t\toption.setAttribute( 'value', id );\n\t\t\t\t\t\toption.textContent = SPEAKER_LAYOUTS[ id ];\n\t\t\t\t\t\tlayoutDropdown.appendChild( option );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Monitor the dropdown for changes\n\t\t\t\t\tlayoutDropdown.addEventListener( 'change', function( event ) {\n\n\t\t\t\t\t\tsetLayout( layoutDropdown.value );\n\n\t\t\t\t\t}, false );\n\n\t\t\t\t\t// Restore any currently persisted layout\n\t\t\t\t\tsetLayout( getLayout() );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Sets a new speaker view layout. The layout is persisted\n\t\t\t\t * in local storage.\n\t\t\t\t */\n\t\t\t\tfunction setLayout( value ) {\n\n\t\t\t\t\tvar title = SPEAKER_LAYOUTS[ value ];\n\n\t\t\t\t\tlayoutLabel.innerHTML = 'Layout' + ( title ? ( ': ' + title ) : '' );\n\t\t\t\t\tlayoutDropdown.value = value;\n\n\t\t\t\t\tdocument.body.setAttribute( 'data-speaker-layout', value );\n\n\t\t\t\t\t// Persist locally\n\t\t\t\t\tif( supportsLocalStorage() ) {\n\t\t\t\t\t\twindow.localStorage.setItem( 'reveal-speaker-layout', value );\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Returns the ID of the most recently set speaker layout\n\t\t\t\t * or our default layout if none has been set.\n\t\t\t\t */\n\t\t\t\tfunction getLayout() {\n\n\t\t\t\t\tif( supportsLocalStorage() ) {\n\t\t\t\t\t\tvar layout = window.localStorage.getItem( 'reveal-speaker-layout' );\n\t\t\t\t\t\tif( layout ) {\n\t\t\t\t\t\t\treturn layout;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\t// Default to the first record in the layouts hash\n\t\t\t\t\tfor( var id in SPEAKER_LAYOUTS ) {\n\t\t\t\t\t\treturn id;\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tfunction supportsLocalStorage() {\n\n\t\t\t\t\ttry {\n\t\t\t\t\t\tlocalStorage.setItem('test', 'test');\n\t\t\t\t\t\tlocalStorage.removeItem('test');\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t}\n\t\t\t\t\tcatch( e ) {\n\t\t\t\t\t\treturn false;\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tfunction zeroPadInteger( num ) {\n\n\t\t\t\t\tvar str = '00' + parseInt( num );\n\t\t\t\t\treturn str.substring( str.length - 2 );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Limits the frequency at which a function can be called.\n\t\t\t\t */\n\t\t\t\tfunction debounce( fn, ms ) {\n\n\t\t\t\t\tvar lastTime = 0,\n\t\t\t\t\t\ttimeout;\n\n\t\t\t\t\treturn function() {\n\n\t\t\t\t\t\tvar args = arguments;\n\t\t\t\t\t\tvar context = this;\n\n\t\t\t\t\t\tclearTimeout( timeout );\n\n\t\t\t\t\t\tvar timeSinceLastCall = Date.now() - lastTime;\n\t\t\t\t\t\tif( timeSinceLastCall > ms ) {\n\t\t\t\t\t\t\tfn.apply( context, args );\n\t\t\t\t\t\t\tlastTime = Date.now();\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\ttimeout = setTimeout( function() {\n\t\t\t\t\t\t\t\tfn.apply( context, args );\n\t\t\t\t\t\t\t\tlastTime = Date.now();\n\t\t\t\t\t\t\t}, ms - timeSinceLastCall );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t})();\n\n\t\t<\/script>\n\t</body>\n</html>"),!n)return void alert("Speaker view popup failed to open. Please make sure popups are allowed and reopen the speaker view.");!function(){const i=e.getConfig().url,s="string"==typeof i?i:window.location.protocol+"//"+window.location.host+window.location.pathname+window.location.search;t=setInterval((function(){n.postMessage(JSON.stringify({namespace:"reveal-notes",type:"connect",state:e.getState(),url:s}),"*")}),500),window.addEventListener("message",r)}()}}function s(t){let i=e.getCurrentSlide(),s=i.querySelectorAll("aside.notes"),r=i.querySelector(".current-fragment"),a={namespace:"reveal-notes",type:"state",notes:"",markdown:!1,whitespace:"normal",state:e.getState()};if(i.hasAttribute("data-notes")&&(a.notes=i.getAttribute("data-notes"),a.whitespace="pre-wrap"),r){let t=r.querySelector("aside.notes");t?(a.notes=t.innerHTML,a.markdown="string"==typeof t.getAttribute("data-markdown"),s=null):r.hasAttribute("data-notes")&&(a.notes=r.getAttribute("data-notes"),a.whitespace="pre-wrap",s=null)}s&&s.length&&(s=Array.from(s).filter((t=>null===t.closest(".fragment"))),a.notes=s.map((t=>t.innerHTML)).join("\n"),a.markdown=s[0]&&"string"==typeof s[0].getAttribute("data-markdown")),n.postMessage(JSON.stringify(a),"*")}function r(i){if(function(t){try{return window.location.origin===t.source.location.origin}catch(t){return!1}}(i))try{let s=JSON.parse(i.data);s&&"reveal-notes"===s.namespace&&"connected"===s.type?(clearInterval(t),a()):s&&"reveal-notes"===s.namespace&&"call"===s.type&&function(t,i,s){let r=e[t].apply(e,i);n.postMessage(JSON.stringify({namespace:"reveal-notes",type:"return",result:r,callId:s}),"*")}(s.methodName,s.arguments,s.callId)}catch(t){}}function a(){e.on("slidechanged",s),e.on("fragmentshown",s),e.on("fragmenthidden",s),e.on("overviewhidden",s),e.on("overviewshown",s),e.on("paused",s),e.on("resumed",s),s()}return{id:"notes",init:function(t){e=t,/receiver/i.test(window.location.search)||(null!==window.location.search.match(/(\?|\&)notes/gi)?i():window.addEventListener("message",(t=>{if(!n&&"string"==typeof t.data){let i;try{i=JSON.parse(t.data)}catch(t){}i&&"reveal-notes"===i.namespace&&"heartbeat"===i.type&&(e=t.source,n&&!n.closed?n.focus():(n=e,window.addEventListener("message",r),a()))}var e})),e.addKeyBinding({keyCode:83,key:"S",description:"Speaker notes view"},(function(){i()})))},open:i}};export{N as default};
diff --git a/_freeze/site_libs/revealjs/plugin/notes/notes.js b/_freeze/site_libs/revealjs/plugin/notes/notes.js
@@ -0,0 +1 @@
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$={escape:/^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,autolink:/^<(scheme:[^\s\x00-\x1f<>]*|email)>/,url:b,tag:"^comment|^</[a-zA-Z][\\w:-]*\\s*>|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>|^<\\?[\\s\\S]*?\\?>|^<![a-zA-Z]+\\s[\\s\\S]*?>|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>",link:/^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,reflink:/^!?\[(label)\]\[(ref)\]/,nolink:/^!?\[(ref)\](?:\[\])?/,reflinkSearch:"reflink|nolink(?!\\()",emStrong:{lDelim:/^(?:\*+(?:([punct_])|[^\s*]))|^_+(?:([punct*])|([^\s_]))/,rDelimAst:/^(?:[^_*\\]|\\.)*?\_\_(?:[^_*\\]|\\.)*?\*(?:[^_*\\]|\\.)*?(?=\_\_)|(?:[^*\\]|\\.)+(?=[^*])|[punct_](\*+)(?=[\s]|$)|(?:[^punct*_\s\\]|\\.)(\*+)(?=[punct_\s]|$)|[punct_\s](\*+)(?=[^punct*_\s])|[\s](\*+)(?=[punct_])|[punct_](\*+)(?=[punct_])|(?:[^punct*_\s\\]|\\.)(\*+)(?=[^punct*_\s])/,rDelimUnd:/^(?:[^_*\\]|\\.)*?\*\*(?:[^_*\\]|\\.)*?\_(?:[^_*\\]|\\.)*?(?=\*\*)|(?:[^_\\]|\\.)+(?=[^_])|[punct*](\_+)(?=[\s]|$)|(?:[^punct*_\s\\]|\\.)(\_+)(?=[punct*\s]|$)|[punct*\s](\_+)(?=[^punct*_\s])|[\s](\_+)(?=[punct*])|[punct*](\_+)(?=[punct*])/},code:/^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,br:/^( {2,}|\\)\n(?!\s*$)/,del:b,text:/^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*_]|\b_|$)|[^ ](?= {2,}\n)))/,punctuation:/^([\spunctuation])/};function E(t){return t.replace(/---/g,"—").replace(/--/g,"–").replace(/(^|[-\u2014/(\[{"\s])'/g,"$1‘").replace(/'/g,"’").replace(/(^|[-\u2014/(\[{\u2018\s])"/g,"$1“").replace(/"/g,"”").replace(/\.{3}/g,"…")}function A(t){let e,n,i="";const s=t.length;for(e=0;e<s;e++)n=t.charCodeAt(e),Math.random()>.5&&(n="x"+n.toString(16)),i+="&#"+n+";";return i}$._punctuation="!\"#$%&'()+\\-.,/:;<=>?@\\[\\]`^{|}~",$.punctuation=d($.punctuation).replace(/punctuation/g,$._punctuation).getRegex(),$.blockSkip=/\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g,$.escapedEmSt=/(?:^|[^\\])(?:\\\\)*\\[*_]/g,$._comment=d(z._comment).replace("(?:--\x3e|$)","--\x3e").getRegex(),$.emStrong.lDelim=d($.emStrong.lDelim).replace(/punct/g,$._punctuation).getRegex(),$.emStrong.rDelimAst=d($.emStrong.rDelimAst,"g").replace(/punct/g,$._punctuation).getRegex(),$.emStrong.rDelimUnd=d($.emStrong.rDelimUnd,"g").replace(/punct/g,$._punctuation).getRegex(),$._escapes=/\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g,$._scheme=/[a-zA-Z][a-zA-Z0-9+.-]{1,31}/,$._email=/[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/,$.autolink=d($.autolink).replace("scheme",$._scheme).replace("email",$._email).getRegex(),$._attribute=/\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/,$.tag=d($.tag).replace("comment",$._comment).replace("attribute",$._attribute).getRegex(),$._label=/(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/,$._href=/<(?:\\.|[^\n<>\\])+>|[^\s\x00-\x1f]*/,$._title=/"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/,$.link=d($.link).replace("label",$._label).replace("href",$._href).replace("title",$._title).getRegex(),$.reflink=d($.reflink).replace("label",$._label).replace("ref",z._label).getRegex(),$.nolink=d($.nolink).replace("ref",z._label).getRegex(),$.reflinkSearch=d($.reflinkSearch,"g").replace("reflink",$.reflink).replace("nolink",$.nolink).getRegex(),$.normal={...$},$.pedantic={...$.normal,strong:{start:/^__|\*\*/,middle:/^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,endAst:/\*\*(?!\*)/g,endUnd:/__(?!_)/g},em:{start:/^_|\*/,middle:/^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,endAst:/\*(?!\*)/g,endUnd:/_(?!_)/g},link:d(/^!?\[(label)\]\((.*?)\)/).replace("label",$._label).getRegex(),reflink:d(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace("label",$._label).getRegex()},$.gfm={...$.normal,escape:d($.escape).replace("])","~|])").getRegex(),_extended_email:/[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,url:/^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,_backpedal:/(?:[^?!.,:;*_'"~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_'"~)]+(?!$))+/,del:/^(~~?)(?=[^\s~])([\s\S]*?[^\s~])\1(?=[^~]|$)/,text:/^([`~]+|[^`~])(?:(?= {2,}\n)|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)|[\s\S]*?(?:(?=[\\<!\[`*~_]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)))/},$.gfm.url=d($.gfm.url,"i").replace("email",$.gfm._extended_email).getRegex(),$.breaks={...$.gfm,br:d($.br).replace("{2,}","*").getRegex(),text:d($.gfm.text).replace("\\b_","\\b_| {2,}\\n").replace(/\{2,\}/g,"*").getRegex()};class R{constructor(t){this.tokens=[],this.tokens.links=Object.create(null),this.options=t||e,this.options.tokenizer=this.options.tokenizer||new _,this.tokenizer=this.options.tokenizer,this.tokenizer.options=this.options,this.tokenizer.lexer=this,this.inlineQueue=[],this.state={inLink:!1,inRawBlock:!1,top:!0};const n={block:z.normal,inline:$.normal};this.options.pedantic?(n.block=z.pedantic,n.inline=$.pedantic):this.options.gfm&&(n.block=z.gfm,this.options.breaks?n.inline=$.breaks:n.inline=$.gfm),this.tokenizer.rules=n}static get rules(){return{block:z,inline:$}}static lex(t,e){return new R(e).lex(t)}static lexInline(t,e){return new R(e).inlineTokens(t)}lex(t){let e;for(t=t.replace(/\r\n|\r/g,"\n"),this.blockTokens(t,this.tokens);e=this.inlineQueue.shift();)this.inlineTokens(e.src,e.tokens);return this.tokens}blockTokens(t,e=[]){let n,i,s,r;for(t=this.options.pedantic?t.replace(/\t/g," ").replace(/^ +$/gm,""):t.replace(/^( *)(\t+)/gm,((t,e,n)=>e+" ".repeat(n.length)));t;)if(!(this.options.extensions&&this.options.extensions.block&&this.options.extensions.block.some((i=>!!(n=i.call({lexer:this},t,e))&&(t=t.substring(n.raw.length),e.push(n),!0)))))if(n=this.tokenizer.space(t))t=t.substring(n.raw.length),1===n.raw.length&&e.length>0?e[e.length-1].raw+="\n":e.push(n);else if(n=this.tokenizer.code(t))t=t.substring(n.raw.length),i=e[e.length-1],!i||"paragraph"!==i.type&&"text"!==i.type?e.push(n):(i.raw+="\n"+n.raw,i.text+="\n"+n.text,this.inlineQueue[this.inlineQueue.length-1].src=i.text);else if(n=this.tokenizer.fences(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.heading(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.hr(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.blockquote(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.list(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.html(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.def(t))t=t.substring(n.raw.length),i=e[e.length-1],!i||"paragraph"!==i.type&&"text"!==i.type?this.tokens.links[n.tag]||(this.tokens.links[n.tag]={href:n.href,title:n.title}):(i.raw+="\n"+n.raw,i.text+="\n"+n.raw,this.inlineQueue[this.inlineQueue.length-1].src=i.text);else if(n=this.tokenizer.table(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.lheading(t))t=t.substring(n.raw.length),e.push(n);else{if(s=t,this.options.extensions&&this.options.extensions.startBlock){let e=1/0;const n=t.slice(1);let i;this.options.extensions.startBlock.forEach((function(t){i=t.call({lexer:this},n),"number"==typeof i&&i>=0&&(e=Math.min(e,i))})),e<1/0&&e>=0&&(s=t.substring(0,e+1))}if(this.state.top&&(n=this.tokenizer.paragraph(s)))i=e[e.length-1],r&&"paragraph"===i.type?(i.raw+="\n"+n.raw,i.text+="\n"+n.text,this.inlineQueue.pop(),this.inlineQueue[this.inlineQueue.length-1].src=i.text):e.push(n),r=s.length!==t.length,t=t.substring(n.raw.length);else if(n=this.tokenizer.text(t))t=t.substring(n.raw.length),i=e[e.length-1],i&&"text"===i.type?(i.raw+="\n"+n.raw,i.text+="\n"+n.text,this.inlineQueue.pop(),this.inlineQueue[this.inlineQueue.length-1].src=i.text):e.push(n);else if(t){const e="Infinite loop on byte: "+t.charCodeAt(0);if(this.options.silent){console.error(e);break}throw new Error(e)}}return this.state.top=!0,e}inline(t,e=[]){return this.inlineQueue.push({src:t,tokens:e}),e}inlineTokens(t,e=[]){let n,i,s,r,a,o,l=t;if(this.tokens.links){const t=Object.keys(this.tokens.links);if(t.length>0)for(;null!=(r=this.tokenizer.rules.inline.reflinkSearch.exec(l));)t.includes(r[0].slice(r[0].lastIndexOf("[")+1,-1))&&(l=l.slice(0,r.index)+"["+S("a",r[0].length-2)+"]"+l.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex))}for(;null!=(r=this.tokenizer.rules.inline.blockSkip.exec(l));)l=l.slice(0,r.index)+"["+S("a",r[0].length-2)+"]"+l.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);for(;null!=(r=this.tokenizer.rules.inline.escapedEmSt.exec(l));)l=l.slice(0,r.index+r[0].length-2)+"++"+l.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex),this.tokenizer.rules.inline.escapedEmSt.lastIndex--;for(;t;)if(a||(o=""),a=!1,!(this.options.extensions&&this.options.extensions.inline&&this.options.extensions.inline.some((i=>!!(n=i.call({lexer:this},t,e))&&(t=t.substring(n.raw.length),e.push(n),!0)))))if(n=this.tokenizer.escape(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.tag(t))t=t.substring(n.raw.length),i=e[e.length-1],i&&"text"===n.type&&"text"===i.type?(i.raw+=n.raw,i.text+=n.text):e.push(n);else if(n=this.tokenizer.link(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.reflink(t,this.tokens.links))t=t.substring(n.raw.length),i=e[e.length-1],i&&"text"===n.type&&"text"===i.type?(i.raw+=n.raw,i.text+=n.text):e.push(n);else if(n=this.tokenizer.emStrong(t,l,o))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.codespan(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.br(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.del(t))t=t.substring(n.raw.length),e.push(n);else if(n=this.tokenizer.autolink(t,A))t=t.substring(n.raw.length),e.push(n);else if(this.state.inLink||!(n=this.tokenizer.url(t,A))){if(s=t,this.options.extensions&&this.options.extensions.startInline){let e=1/0;const n=t.slice(1);let i;this.options.extensions.startInline.forEach((function(t){i=t.call({lexer:this},n),"number"==typeof i&&i>=0&&(e=Math.min(e,i))})),e<1/0&&e>=0&&(s=t.substring(0,e+1))}if(n=this.tokenizer.inlineText(s,E))t=t.substring(n.raw.length),"_"!==n.raw.slice(-1)&&(o=n.raw.slice(-1)),a=!0,i=e[e.length-1],i&&"text"===i.type?(i.raw+=n.raw,i.text+=n.text):e.push(n);else if(t){const e="Infinite loop on byte: "+t.charCodeAt(0);if(this.options.silent){console.error(e);break}throw new Error(e)}}else t=t.substring(n.raw.length),e.push(n);return e}}class L{constructor(t){this.options=t||e}code(t,e,n){const i=(e||"").match(/\S*/)[0];if(this.options.highlight){const e=this.options.highlight(t,i);null!=e&&e!==t&&(n=!0,t=e)}return t=t.replace(/\n$/,"")+"\n",i?'<pre><code class="'+this.options.langPrefix+l(i)+'">'+(n?t:l(t,!0))+"</code></pre>\n":"<pre><code>"+(n?t:l(t,!0))+"</code></pre>\n"}blockquote(t){return`<blockquote>\n${t}</blockquote>\n`}html(t){return t}heading(t,e,n,i){if(this.options.headerIds){return`<h${e} id="${this.options.headerPrefix+i.slug(n)}">${t}</h${e}>\n`}return`<h${e}>${t}</h${e}>\n`}hr(){return this.options.xhtml?"<hr/>\n":"<hr>\n"}list(t,e,n){const i=e?"ol":"ul";return"<"+i+(e&&1!==n?' start="'+n+'"':"")+">\n"+t+"</"+i+">\n"}listitem(t){return`<li>${t}</li>\n`}checkbox(t){return"<input "+(t?'checked="" ':"")+'disabled="" type="checkbox"'+(this.options.xhtml?" /":"")+"> "}paragraph(t){return`<p>${t}</p>\n`}table(t,e){return e&&(e=`<tbody>${e}</tbody>`),"<table>\n<thead>\n"+t+"</thead>\n"+e+"</table>\n"}tablerow(t){return`<tr>\n${t}</tr>\n`}tablecell(t,e){const n=e.header?"th":"td";return(e.align?`<${n} align="${e.align}">`:`<${n}>`)+t+`</${n}>\n`}strong(t){return`<strong>${t}</strong>`}em(t){return`<em>${t}</em>`}codespan(t){return`<code>${t}</code>`}br(){return this.options.xhtml?"<br/>":"<br>"}del(t){return`<del>${t}</del>`}link(t,e,n){if(null===(t=m(this.options.sanitize,this.options.baseUrl,t)))return n;let i='<a href="'+t+'"';return e&&(i+=' title="'+e+'"'),i+=">"+n+"</a>",i}image(t,e,n){if(null===(t=m(this.options.sanitize,this.options.baseUrl,t)))return n;let i=`<img src="${t}" alt="${n}"`;return e&&(i+=` title="${e}"`),i+=this.options.xhtml?"/>":">",i}text(t){return t}}class I{strong(t){return t}em(t){return t}codespan(t){return t}del(t){return t}html(t){return t}text(t){return t}link(t,e,n){return""+n}image(t,e,n){return""+n}br(){return""}}class M{constructor(){this.seen={}}serialize(t){return t.toLowerCase().trim().replace(/<[!\/a-z].*?>/gi,"").replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g,"").replace(/\s/g,"-")}getNextSafeSlug(t,e){let n=t,i=0;if(this.seen.hasOwnProperty(n)){i=this.seen[t];do{i++,n=t+"-"+i}while(this.seen.hasOwnProperty(n))}return e||(this.seen[t]=i,this.seen[n]=0),n}slug(t,e={}){const n=this.serialize(t);return this.getNextSafeSlug(n,e.dryrun)}}class C{constructor(t){this.options=t||e,this.options.renderer=this.options.renderer||new L,this.renderer=this.options.renderer,this.renderer.options=this.options,this.textRenderer=new I,this.slugger=new M}static parse(t,e){return new C(e).parse(t)}static parseInline(t,e){return new C(e).parseInline(t)}parse(t,e=!0){let n,i,s,r,a,o,l,c,u,d,h,g,m,f,k,w,x,b,y,v="";const S=t.length;for(n=0;n<S;n++)if(d=t[n],this.options.extensions&&this.options.extensions.renderers&&this.options.extensions.renderers[d.type]&&(y=this.options.extensions.renderers[d.type].call({parser:this},d),!1!==y||!["space","hr","heading","code","table","blockquote","list","html","paragraph","text"].includes(d.type)))v+=y||"";else switch(d.type){case"space":continue;case"hr":v+=this.renderer.hr();continue;case"heading":v+=this.renderer.heading(this.parseInline(d.tokens),d.depth,p(this.parseInline(d.tokens,this.textRenderer)),this.slugger);continue;case"code":v+=this.renderer.code(d.text,d.lang,d.escaped);continue;case"table":for(c="",l="",r=d.header.length,i=0;i<r;i++)l+=this.renderer.tablecell(this.parseInline(d.header[i].tokens),{header:!0,align:d.align[i]});for(c+=this.renderer.tablerow(l),u="",r=d.rows.length,i=0;i<r;i++){for(o=d.rows[i],l="",a=o.length,s=0;s<a;s++)l+=this.renderer.tablecell(this.parseInline(o[s].tokens),{header:!1,align:d.align[s]});u+=this.renderer.tablerow(l)}v+=this.renderer.table(c,u);continue;case"blockquote":u=this.parse(d.tokens),v+=this.renderer.blockquote(u);continue;case"list":for(h=d.ordered,g=d.start,m=d.loose,r=d.items.length,u="",i=0;i<r;i++)k=d.items[i],w=k.checked,x=k.task,f="",k.task&&(b=this.renderer.checkbox(w),m?k.tokens.length>0&&"paragraph"===k.tokens[0].type?(k.tokens[0].text=b+" 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100%;\n\t\t\t\tborder: 1px solid #ddd;\n\t\t\t}\n\n\t\t\t#current-slide .label,\n\t\t\t#upcoming-slide .label {\n\t\t\t\tposition: absolute;\n\t\t\t\ttop: 10px;\n\t\t\t\tleft: 10px;\n\t\t\t\tz-index: 2;\n\t\t\t}\n\n\t\t\t#connection-status {\n\t\t\t\tposition: absolute;\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 0;\n\t\t\t\twidth: 100%;\n\t\t\t\theight: 100%;\n\t\t\t\tz-index: 20;\n\t\t\t\tpadding: 30% 20% 20% 20%;\n\t\t\t\tfont-size: 18px;\n\t\t\t\tcolor: #222;\n\t\t\t\tbackground: #fff;\n\t\t\t\ttext-align: center;\n\t\t\t\tbox-sizing: border-box;\n\t\t\t\tline-height: 1.4;\n\t\t\t}\n\n\t\t\t.overlay-element {\n\t\t\t\theight: 34px;\n\t\t\t\tline-height: 34px;\n\t\t\t\tpadding: 0 10px;\n\t\t\t\ttext-shadow: none;\n\t\t\t\tbackground: rgba( 220, 220, 220, 0.8 );\n\t\t\t\tcolor: #222;\n\t\t\t\tfont-size: 14px;\n\t\t\t}\n\n\t\t\t.overlay-element.interactive:hover {\n\t\t\t\tbackground: rgba( 220, 220, 220, 1 );\n\t\t\t}\n\n\t\t\t#current-slide {\n\t\t\t\tposition: absolute;\n\t\t\t\twidth: 60%;\n\t\t\t\theight: 100%;\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 0;\n\t\t\t\tpadding-right: 0;\n\t\t\t}\n\n\t\t\t#upcoming-slide {\n\t\t\t\tposition: absolute;\n\t\t\t\twidth: 40%;\n\t\t\t\theight: 40%;\n\t\t\t\tright: 0;\n\t\t\t\ttop: 0;\n\t\t\t}\n\n\t\t\t/* Speaker controls */\n\t\t\t#speaker-controls {\n\t\t\t\tposition: absolute;\n\t\t\t\ttop: 40%;\n\t\t\t\tright: 0;\n\t\t\t\twidth: 40%;\n\t\t\t\theight: 60%;\n\t\t\t\toverflow: auto;\n\t\t\t\tfont-size: 18px;\n\t\t\t}\n\n\t\t\t\t.speaker-controls-time.hidden,\n\t\t\t\t.speaker-controls-notes.hidden {\n\t\t\t\t\tdisplay: none;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .label,\n\t\t\t\t.speaker-controls-pace .label,\n\t\t\t\t.speaker-controls-notes .label {\n\t\t\t\t\ttext-transform: uppercase;\n\t\t\t\t\tfont-weight: normal;\n\t\t\t\t\tfont-size: 0.66em;\n\t\t\t\t\tcolor: #666;\n\t\t\t\t\tmargin: 0;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time, .speaker-controls-pace {\n\t\t\t\t\tborder-bottom: 1px solid rgba( 200, 200, 200, 0.5 );\n\t\t\t\t\tmargin-bottom: 10px;\n\t\t\t\t\tpadding: 10px 16px;\n\t\t\t\t\tpadding-bottom: 20px;\n\t\t\t\t\tcursor: pointer;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .reset-button {\n\t\t\t\t\topacity: 0;\n\t\t\t\t\tfloat: right;\n\t\t\t\t\tcolor: #666;\n\t\t\t\t\ttext-decoration: none;\n\t\t\t\t}\n\t\t\t\t.speaker-controls-time:hover .reset-button {\n\t\t\t\t\topacity: 1;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .timer,\n\t\t\t\t.speaker-controls-time .clock {\n\t\t\t\t\twidth: 50%;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .timer,\n\t\t\t\t.speaker-controls-time .clock,\n\t\t\t\t.speaker-controls-time .pacing .hours-value,\n\t\t\t\t.speaker-controls-time .pacing .minutes-value,\n\t\t\t\t.speaker-controls-time .pacing .seconds-value {\n\t\t\t\t\tfont-size: 1.9em;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .timer {\n\t\t\t\t\tfloat: left;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .clock {\n\t\t\t\t\tfloat: right;\n\t\t\t\t\ttext-align: right;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time span.mute {\n\t\t\t\t\topacity: 0.3;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .pacing-title {\n\t\t\t\t\tmargin-top: 5px;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .pacing.ahead {\n\t\t\t\t\tcolor: blue;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .pacing.on-track {\n\t\t\t\t\tcolor: green;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-time .pacing.behind {\n\t\t\t\t\tcolor: red;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-notes {\n\t\t\t\t\tpadding: 10px 16px;\n\t\t\t\t}\n\n\t\t\t\t.speaker-controls-notes .value {\n\t\t\t\t\tmargin-top: 5px;\n\t\t\t\t\tline-height: 1.4;\n\t\t\t\t\tfont-size: 1.2em;\n\t\t\t\t}\n\n\t\t\t/* Layout selector */\n\t\t\t#speaker-layout {\n\t\t\t\tposition: absolute;\n\t\t\t\ttop: 10px;\n\t\t\t\tright: 10px;\n\t\t\t\tcolor: #222;\n\t\t\t\tz-index: 10;\n\t\t\t}\n\t\t\t\t#speaker-layout select {\n\t\t\t\t\tposition: absolute;\n\t\t\t\t\twidth: 100%;\n\t\t\t\t\theight: 100%;\n\t\t\t\t\ttop: 0;\n\t\t\t\t\tleft: 0;\n\t\t\t\t\tborder: 0;\n\t\t\t\t\tbox-shadow: 0;\n\t\t\t\t\tcursor: pointer;\n\t\t\t\t\topacity: 0;\n\n\t\t\t\t\tfont-size: 1em;\n\t\t\t\t\tbackground-color: transparent;\n\n\t\t\t\t\t-moz-appearance: none;\n\t\t\t\t\t-webkit-appearance: none;\n\t\t\t\t\t-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\n\t\t\t\t}\n\n\t\t\t\t#speaker-layout select:focus {\n\t\t\t\t\toutline: none;\n\t\t\t\t\tbox-shadow: none;\n\t\t\t\t}\n\n\t\t\t.clear {\n\t\t\t\tclear: both;\n\t\t\t}\n\n\t\t\t/* Speaker layout: Wide */\n\t\t\tbody[data-speaker-layout=\"wide\"] #current-slide,\n\t\t\tbody[data-speaker-layout=\"wide\"] #upcoming-slide {\n\t\t\t\twidth: 50%;\n\t\t\t\theight: 45%;\n\t\t\t\tpadding: 6px;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"wide\"] #current-slide {\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 0;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"wide\"] #upcoming-slide {\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 50%;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"wide\"] #speaker-controls {\n\t\t\t\ttop: 45%;\n\t\t\t\tleft: 0;\n\t\t\t\twidth: 100%;\n\t\t\t\theight: 50%;\n\t\t\t\tfont-size: 1.25em;\n\t\t\t}\n\n\t\t\t/* Speaker layout: Tall */\n\t\t\tbody[data-speaker-layout=\"tall\"] #current-slide,\n\t\t\tbody[data-speaker-layout=\"tall\"] #upcoming-slide {\n\t\t\t\twidth: 45%;\n\t\t\t\theight: 50%;\n\t\t\t\tpadding: 6px;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"tall\"] #current-slide {\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 0;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"tall\"] #upcoming-slide {\n\t\t\t\ttop: 50%;\n\t\t\t\tleft: 0;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"tall\"] #speaker-controls {\n\t\t\t\tpadding-top: 40px;\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 45%;\n\t\t\t\twidth: 55%;\n\t\t\t\theight: 100%;\n\t\t\t\tfont-size: 1.25em;\n\t\t\t}\n\n\t\t\t/* Speaker layout: Notes only */\n\t\t\tbody[data-speaker-layout=\"notes-only\"] #current-slide,\n\t\t\tbody[data-speaker-layout=\"notes-only\"] #upcoming-slide {\n\t\t\t\tdisplay: none;\n\t\t\t}\n\n\t\t\tbody[data-speaker-layout=\"notes-only\"] #speaker-controls {\n\t\t\t\tpadding-top: 40px;\n\t\t\t\ttop: 0;\n\t\t\t\tleft: 0;\n\t\t\t\twidth: 100%;\n\t\t\t\theight: 100%;\n\t\t\t\tfont-size: 1.25em;\n\t\t\t}\n\n\t\t\t@media screen and (max-width: 1080px) {\n\t\t\t\tbody[data-speaker-layout=\"default\"] #speaker-controls {\n\t\t\t\t\tfont-size: 16px;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t@media screen and (max-width: 900px) {\n\t\t\t\tbody[data-speaker-layout=\"default\"] #speaker-controls {\n\t\t\t\t\tfont-size: 14px;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t@media screen and (max-width: 800px) {\n\t\t\t\tbody[data-speaker-layout=\"default\"] #speaker-controls {\n\t\t\t\t\tfont-size: 12px;\n\t\t\t\t}\n\t\t\t}\n\n\t\t</style>\n\t</head>\n\n\t<body>\n\n\t\t<div id=\"connection-status\">Loading speaker view...</div>\n\n\t\t<div id=\"current-slide\"></div>\n\t\t<div id=\"upcoming-slide\"><span class=\"overlay-element label\">Upcoming</span></div>\n\t\t<div id=\"speaker-controls\">\n\t\t\t<div class=\"speaker-controls-time\">\n\t\t\t\t<h4 class=\"label\">Time <span class=\"reset-button\">Click to Reset</span></h4>\n\t\t\t\t<div class=\"clock\">\n\t\t\t\t\t<span class=\"clock-value\">0:00 AM</span>\n\t\t\t\t</div>\n\t\t\t\t<div class=\"timer\">\n\t\t\t\t\t<span class=\"hours-value\">00</span><span class=\"minutes-value\">:00</span><span class=\"seconds-value\">:00</span>\n\t\t\t\t</div>\n\t\t\t\t<div class=\"clear\"></div>\n\n\t\t\t\t<h4 class=\"label pacing-title\" style=\"display: none\">Pacing – Time to finish current slide</h4>\n\t\t\t\t<div class=\"pacing\" style=\"display: none\">\n\t\t\t\t\t<span class=\"hours-value\">00</span><span class=\"minutes-value\">:00</span><span class=\"seconds-value\">:00</span>\n\t\t\t\t</div>\n\t\t\t</div>\n\n\t\t\t<div class=\"speaker-controls-notes hidden\">\n\t\t\t\t<h4 class=\"label\">Notes</h4>\n\t\t\t\t<div class=\"value\"></div>\n\t\t\t</div>\n\t\t</div>\n\t\t<div id=\"speaker-layout\" class=\"overlay-element interactive\">\n\t\t\t<span class=\"speaker-layout-label\"></span>\n\t\t\t<select class=\"speaker-layout-dropdown\"></select>\n\t\t</div>\n\n\t\t<script>\n\n\t\t\t(function() {\n\n\t\t\t\tvar notes,\n\t\t\t\t\tnotesValue,\n\t\t\t\t\tcurrentState,\n\t\t\t\t\tcurrentSlide,\n\t\t\t\t\tupcomingSlide,\n\t\t\t\t\tlayoutLabel,\n\t\t\t\t\tlayoutDropdown,\n\t\t\t\t\tpendingCalls = {},\n\t\t\t\t\tlastRevealApiCallId = 0,\n\t\t\t\t\tconnected = false\n\n\t\t\t\tvar connectionStatus = document.querySelector( '#connection-status' );\n\n\t\t\t\tvar SPEAKER_LAYOUTS = {\n\t\t\t\t\t'default': 'Default',\n\t\t\t\t\t'wide': 'Wide',\n\t\t\t\t\t'tall': 'Tall',\n\t\t\t\t\t'notes-only': 'Notes only'\n\t\t\t\t};\n\n\t\t\t\tsetupLayout();\n\n\t\t\t\tlet openerOrigin;\n\n\t\t\t\ttry {\n\t\t\t\t\topenerOrigin = window.opener.location.origin;\n\t\t\t\t}\n\t\t\t\tcatch ( error ) { console.warn( error ) }\n\n\t\t\t\t// In order to prevent XSS, the speaker view will only run if its\n\t\t\t\t// opener has the same origin as itself\n\t\t\t\tif( window.location.origin !== openerOrigin ) {\n\t\t\t\t\tconnectionStatus.innerHTML = 'Cross origin error.<br>The speaker window can only be opened from the same origin.';\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tvar connectionTimeout = setTimeout( function() {\n\t\t\t\t\tconnectionStatus.innerHTML = 'Error connecting to main window.<br>Please try closing and reopening the speaker view.';\n\t\t\t\t}, 5000 );\n\n\t\t\t\twindow.addEventListener( 'message', function( event ) {\n\n\t\t\t\t\t// Validate the origin of all messages to avoid parsing messages\n\t\t\t\t\t// that aren't meant for us. Ignore when running off file:// so\n\t\t\t\t\t// that the speaker view continues to work without a web server.\n\t\t\t\t\tif( window.location.origin !== event.origin && window.location.origin !== 'file://' ) {\n\t\t\t\t\t\treturn\n\t\t\t\t\t}\n\n\t\t\t\t\tclearTimeout( connectionTimeout );\n\t\t\t\t\tconnectionStatus.style.display = 'none';\n\n\t\t\t\t\tvar data = JSON.parse( event.data );\n\n\t\t\t\t\t// The overview mode is only useful to the reveal.js instance\n\t\t\t\t\t// where navigation occurs so we don't sync it\n\t\t\t\t\tif( data.state ) delete data.state.overview;\n\n\t\t\t\t\t// Messages sent by the notes plugin inside of the main window\n\t\t\t\t\tif( data && data.namespace === 'reveal-notes' ) {\n\t\t\t\t\t\tif( data.type === 'connect' ) {\n\t\t\t\t\t\t\thandleConnectMessage( data );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse if( data.type === 'state' ) {\n\t\t\t\t\t\t\thandleStateMessage( data );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse if( data.type === 'return' ) {\n\t\t\t\t\t\t\tpendingCalls[data.callId](data.result);\n\t\t\t\t\t\t\tdelete pendingCalls[data.callId];\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\t// Messages sent by the reveal.js inside of the current slide preview\n\t\t\t\t\telse if( data && data.namespace === 'reveal' ) {\n\t\t\t\t\t\tif( /ready/.test( data.eventName ) ) {\n\t\t\t\t\t\t\t// Send a message back to notify that the handshake is complete\n\t\t\t\t\t\t\twindow.opener.postMessage( JSON.stringify({ namespace: 'reveal-notes', type: 'connected'} ), '*' );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse if( /slidechanged|fragmentshown|fragmenthidden|paused|resumed/.test( data.eventName ) && currentState !== JSON.stringify( data.state ) ) {\n\n\t\t\t\t\t\t\tdispatchStateToMainWindow( data.state );\n\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\n\t\t\t\t/**\n\t\t\t\t * Updates the presentation in the main window to match the state\n\t\t\t\t * of the presentation in the notes window.\n\t\t\t\t */\n\t\t\t\tconst dispatchStateToMainWindow = debounce(( state ) => {\n\t\t\t\t\twindow.opener.postMessage( JSON.stringify({ method: 'setState', args: [ state ]} ), '*' );\n\t\t\t\t}, 500);\n\n\t\t\t\t/**\n\t\t\t\t * Asynchronously calls the Reveal.js API of the main frame.\n\t\t\t\t */\n\t\t\t\tfunction callRevealApi( methodName, methodArguments, callback ) {\n\n\t\t\t\t\tvar callId = ++lastRevealApiCallId;\n\t\t\t\t\tpendingCalls[callId] = callback;\n\t\t\t\t\twindow.opener.postMessage( JSON.stringify( {\n\t\t\t\t\t\tnamespace: 'reveal-notes',\n\t\t\t\t\t\ttype: 'call',\n\t\t\t\t\t\tcallId: callId,\n\t\t\t\t\t\tmethodName: methodName,\n\t\t\t\t\t\targuments: methodArguments\n\t\t\t\t\t} ), '*' );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Called when the main window is trying to establish a\n\t\t\t\t * connection.\n\t\t\t\t */\n\t\t\t\tfunction handleConnectMessage( data ) {\n\n\t\t\t\t\tif( connected === false ) {\n\t\t\t\t\t\tconnected = true;\n\n\t\t\t\t\t\tsetupIframes( data );\n\t\t\t\t\t\tsetupKeyboard();\n\t\t\t\t\t\tsetupNotes();\n\t\t\t\t\t\tsetupTimer();\n\t\t\t\t\t\tsetupHeartbeat();\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Called when the main window sends an updated state.\n\t\t\t\t */\n\t\t\t\tfunction handleStateMessage( data ) {\n\n\t\t\t\t\t// Store the most recently set state to avoid circular loops\n\t\t\t\t\t// applying the same state\n\t\t\t\t\tcurrentState = JSON.stringify( data.state );\n\n\t\t\t\t\t// No need for updating the notes in case of fragment changes\n\t\t\t\t\tif ( data.notes ) {\n\t\t\t\t\t\tnotes.classList.remove( 'hidden' );\n\t\t\t\t\t\tnotesValue.style.whiteSpace = data.whitespace;\n\t\t\t\t\t\tif( data.markdown ) {\n\t\t\t\t\t\t\tnotesValue.innerHTML = marked( data.notes );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tnotesValue.innerHTML = data.notes;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse {\n\t\t\t\t\t\tnotes.classList.add( 'hidden' );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Update the note slides\n\t\t\t\t\tcurrentSlide.contentWindow.postMessage( JSON.stringify({ method: 'setState', args: [ data.state ] }), '*' );\n\t\t\t\t\tupcomingSlide.contentWindow.postMessage( JSON.stringify({ method: 'setState', args: [ data.state ] }), '*' );\n\t\t\t\t\tupcomingSlide.contentWindow.postMessage( JSON.stringify({ method: 'next' }), '*' );\n\n\t\t\t\t}\n\n\t\t\t\t// Limit to max one state update per X ms\n\t\t\t\thandleStateMessage = debounce( handleStateMessage, 200 );\n\n\t\t\t\t/**\n\t\t\t\t * Forward keyboard events to the current slide window.\n\t\t\t\t * This enables keyboard events to work even if focus\n\t\t\t\t * isn't set on the current slide iframe.\n\t\t\t\t *\n\t\t\t\t * Block F5 default handling, it reloads and disconnects\n\t\t\t\t * the speaker notes window.\n\t\t\t\t */\n\t\t\t\tfunction setupKeyboard() {\n\n\t\t\t\t\tdocument.addEventListener( 'keydown', function( event ) {\n\t\t\t\t\t\tif( event.keyCode === 116 || ( event.metaKey && event.keyCode === 82 ) ) {\n\t\t\t\t\t\t\tevent.preventDefault();\n\t\t\t\t\t\t\treturn false;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tcurrentSlide.contentWindow.postMessage( JSON.stringify({ method: 'triggerKey', args: [ event.keyCode ] }), '*' );\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Creates the preview iframes.\n\t\t\t\t */\n\t\t\t\tfunction setupIframes( data ) {\n\n\t\t\t\t\tvar params = [\n\t\t\t\t\t\t'receiver',\n\t\t\t\t\t\t'progress=false',\n\t\t\t\t\t\t'history=false',\n\t\t\t\t\t\t'transition=none',\n\t\t\t\t\t\t'autoSlide=0',\n\t\t\t\t\t\t'backgroundTransition=none'\n\t\t\t\t\t].join( '&' );\n\n\t\t\t\t\tvar urlSeparator = /\\?/.test(data.url) ? '&' : '?';\n\t\t\t\t\tvar hash = '#/' + data.state.indexh + '/' + data.state.indexv;\n\t\t\t\t\tvar currentURL = data.url + urlSeparator + params + '&scrollActivationWidth=false&postMessageEvents=true' + hash;\n\t\t\t\t\tvar upcomingURL = data.url + urlSeparator + params + '&scrollActivationWidth=false&controls=false' + hash;\n\n\t\t\t\t\tcurrentSlide = document.createElement( 'iframe' );\n\t\t\t\t\tcurrentSlide.setAttribute( 'width', 1280 );\n\t\t\t\t\tcurrentSlide.setAttribute( 'height', 1024 );\n\t\t\t\t\tcurrentSlide.setAttribute( 'src', currentURL );\n\t\t\t\t\tdocument.querySelector( '#current-slide' ).appendChild( currentSlide );\n\n\t\t\t\t\tupcomingSlide = document.createElement( 'iframe' );\n\t\t\t\t\tupcomingSlide.setAttribute( 'width', 640 );\n\t\t\t\t\tupcomingSlide.setAttribute( 'height', 512 );\n\t\t\t\t\tupcomingSlide.setAttribute( 'src', upcomingURL );\n\t\t\t\t\tdocument.querySelector( '#upcoming-slide' ).appendChild( upcomingSlide );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Setup the notes UI.\n\t\t\t\t */\n\t\t\t\tfunction setupNotes() {\n\n\t\t\t\t\tnotes = document.querySelector( '.speaker-controls-notes' );\n\t\t\t\t\tnotesValue = document.querySelector( '.speaker-controls-notes .value' );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * We send out a heartbeat at all times to ensure we can\n\t\t\t\t * reconnect with the main presentation window after reloads.\n\t\t\t\t */\n\t\t\t\tfunction setupHeartbeat() {\n\n\t\t\t\t\tsetInterval( () => {\n\t\t\t\t\t\twindow.opener.postMessage( JSON.stringify({ namespace: 'reveal-notes', type: 'heartbeat'} ), '*' );\n\t\t\t\t\t}, 1000 );\n\n\t\t\t\t}\n\n\t\t\t\tfunction getTimings( callback ) {\n\n\t\t\t\t\tcallRevealApi( 'getSlidesAttributes', [], function ( slideAttributes ) {\n\t\t\t\t\t\tcallRevealApi( 'getConfig', [], function ( config ) {\n\t\t\t\t\t\t\tvar totalTime = config.totalTime;\n\t\t\t\t\t\t\tvar minTimePerSlide = config.minimumTimePerSlide || 0;\n\t\t\t\t\t\t\tvar defaultTiming = config.defaultTiming;\n\t\t\t\t\t\t\tif ((defaultTiming == null) && (totalTime == null)) {\n\t\t\t\t\t\t\t\tcallback(null);\n\t\t\t\t\t\t\t\treturn;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t// Setting totalTime overrides defaultTiming\n\t\t\t\t\t\t\tif (totalTime) {\n\t\t\t\t\t\t\t\tdefaultTiming = 0;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\tvar timings = [];\n\t\t\t\t\t\t\tfor ( var i in slideAttributes ) {\n\t\t\t\t\t\t\t\tvar slide = slideAttributes[ i ];\n\t\t\t\t\t\t\t\tvar timing = defaultTiming;\n\t\t\t\t\t\t\t\tif( slide.hasOwnProperty( 'data-timing' )) {\n\t\t\t\t\t\t\t\t\tvar t = slide[ 'data-timing' ];\n\t\t\t\t\t\t\t\t\ttiming = parseInt(t);\n\t\t\t\t\t\t\t\t\tif( isNaN(timing) ) {\n\t\t\t\t\t\t\t\t\t\tconsole.warn(\"Could not parse timing '\" + t + \"' of slide \" + i + \"; using default of \" + defaultTiming);\n\t\t\t\t\t\t\t\t\t\ttiming = defaultTiming;\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\ttimings.push(timing);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\tif ( totalTime ) {\n\t\t\t\t\t\t\t\t// After we've allocated time to individual slides, we summarize it and\n\t\t\t\t\t\t\t\t// subtract it from the total time\n\t\t\t\t\t\t\t\tvar remainingTime = totalTime - timings.reduce( function(a, b) { return a + b; }, 0 );\n\t\t\t\t\t\t\t\t// The remaining time is divided by the number of slides that have 0 seconds\n\t\t\t\t\t\t\t\t// allocated at the moment, giving the average time-per-slide on the remaining slides\n\t\t\t\t\t\t\t\tvar remainingSlides = (timings.filter( function(x) { return x == 0 }) ).length\n\t\t\t\t\t\t\t\tvar timePerSlide = Math.round( remainingTime / remainingSlides, 0 )\n\t\t\t\t\t\t\t\t// And now we replace every zero-value timing with that average\n\t\t\t\t\t\t\t\ttimings = timings.map( function(x) { return (x==0 ? timePerSlide : x) } );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\tvar slidesUnderMinimum = timings.filter( function(x) { return (x < minTimePerSlide) } ).length\n\t\t\t\t\t\t\tif ( slidesUnderMinimum ) {\n\t\t\t\t\t\t\t\tmessage = \"The pacing time for \" + slidesUnderMinimum + \" slide(s) is under the configured minimum of \" + minTimePerSlide + \" seconds. Check the data-timing attribute on individual slides, or consider increasing the totalTime or minimumTimePerSlide configuration options (or removing some slides).\";\n\t\t\t\t\t\t\t\talert(message);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\tcallback( timings );\n\t\t\t\t\t\t} );\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Return the number of seconds allocated for presenting\n\t\t\t\t * all slides up to and including this one.\n\t\t\t\t */\n\t\t\t\tfunction getTimeAllocated( timings, callback ) {\n\n\t\t\t\t\tcallRevealApi( 'getSlidePastCount', [], function ( currentSlide ) {\n\t\t\t\t\t\tvar allocated = 0;\n\t\t\t\t\t\tfor (var i in timings.slice(0, currentSlide + 1)) {\n\t\t\t\t\t\t\tallocated += timings[i];\n\t\t\t\t\t\t}\n\t\t\t\t\t\tcallback( allocated );\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Create the timer and clock and start updating them\n\t\t\t\t * at an interval.\n\t\t\t\t */\n\t\t\t\tfunction setupTimer() {\n\n\t\t\t\t\tvar start = new Date(),\n\t\t\t\t\ttimeEl = document.querySelector( '.speaker-controls-time' ),\n\t\t\t\t\tclockEl = timeEl.querySelector( '.clock-value' ),\n\t\t\t\t\thoursEl = timeEl.querySelector( '.hours-value' ),\n\t\t\t\t\tminutesEl = timeEl.querySelector( '.minutes-value' ),\n\t\t\t\t\tsecondsEl = timeEl.querySelector( '.seconds-value' ),\n\t\t\t\t\tpacingTitleEl = timeEl.querySelector( '.pacing-title' ),\n\t\t\t\t\tpacingEl = timeEl.querySelector( '.pacing' ),\n\t\t\t\t\tpacingHoursEl = pacingEl.querySelector( '.hours-value' ),\n\t\t\t\t\tpacingMinutesEl = pacingEl.querySelector( '.minutes-value' ),\n\t\t\t\t\tpacingSecondsEl = pacingEl.querySelector( '.seconds-value' );\n\n\t\t\t\t\tvar timings = null;\n\t\t\t\t\tgetTimings( function ( _timings ) {\n\n\t\t\t\t\t\ttimings = _timings;\n\t\t\t\t\t\tif (_timings !== null) {\n\t\t\t\t\t\t\tpacingTitleEl.style.removeProperty('display');\n\t\t\t\t\t\t\tpacingEl.style.removeProperty('display');\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// Update once directly\n\t\t\t\t\t\t_updateTimer();\n\n\t\t\t\t\t\t// Then update every second\n\t\t\t\t\t\tsetInterval( _updateTimer, 1000 );\n\n\t\t\t\t\t} );\n\n\n\t\t\t\t\tfunction _resetTimer() {\n\n\t\t\t\t\t\tif (timings == null) {\n\t\t\t\t\t\t\tstart = new Date();\n\t\t\t\t\t\t\t_updateTimer();\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\t// Reset timer to beginning of current slide\n\t\t\t\t\t\t\tgetTimeAllocated( timings, function ( slideEndTimingSeconds ) {\n\t\t\t\t\t\t\t\tvar slideEndTiming = slideEndTimingSeconds * 1000;\n\t\t\t\t\t\t\t\tcallRevealApi( 'getSlidePastCount', [], function ( currentSlide ) {\n\t\t\t\t\t\t\t\t\tvar currentSlideTiming = timings[currentSlide] * 1000;\n\t\t\t\t\t\t\t\t\tvar previousSlidesTiming = slideEndTiming - currentSlideTiming;\n\t\t\t\t\t\t\t\t\tvar now = new Date();\n\t\t\t\t\t\t\t\t\tstart = new Date(now.getTime() - previousSlidesTiming);\n\t\t\t\t\t\t\t\t\t_updateTimer();\n\t\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t\ttimeEl.addEventListener( 'click', function() {\n\t\t\t\t\t\t_resetTimer();\n\t\t\t\t\t\treturn false;\n\t\t\t\t\t} );\n\n\t\t\t\t\tfunction _displayTime( hrEl, minEl, secEl, time) {\n\n\t\t\t\t\t\tvar sign = Math.sign(time) == -1 ? \"-\" : \"\";\n\t\t\t\t\t\ttime = Math.abs(Math.round(time / 1000));\n\t\t\t\t\t\tvar seconds = time % 60;\n\t\t\t\t\t\tvar minutes = Math.floor( time / 60 ) % 60 ;\n\t\t\t\t\t\tvar hours = Math.floor( time / ( 60 * 60 )) ;\n\t\t\t\t\t\thrEl.innerHTML = sign + zeroPadInteger( hours );\n\t\t\t\t\t\tif (hours == 0) {\n\t\t\t\t\t\t\thrEl.classList.add( 'mute' );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\thrEl.classList.remove( 'mute' );\n\t\t\t\t\t\t}\n\t\t\t\t\t\tminEl.innerHTML = ':' + zeroPadInteger( minutes );\n\t\t\t\t\t\tif (hours == 0 && minutes == 0) {\n\t\t\t\t\t\t\tminEl.classList.add( 'mute' );\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\tminEl.classList.remove( 'mute' );\n\t\t\t\t\t\t}\n\t\t\t\t\t\tsecEl.innerHTML = ':' + zeroPadInteger( seconds );\n\t\t\t\t\t}\n\n\t\t\t\t\tfunction _updateTimer() {\n\n\t\t\t\t\t\tvar diff, hours, minutes, seconds,\n\t\t\t\t\t\tnow = new Date();\n\n\t\t\t\t\t\tdiff = now.getTime() - start.getTime();\n\n\t\t\t\t\t\tclockEl.innerHTML = now.toLocaleTimeString( 'en-US', { hour12: true, hour: '2-digit', minute:'2-digit' } );\n\t\t\t\t\t\t_displayTime( hoursEl, minutesEl, secondsEl, diff );\n\t\t\t\t\t\tif (timings !== null) {\n\t\t\t\t\t\t\t_updatePacing(diff);\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t\tfunction _updatePacing(diff) {\n\n\t\t\t\t\t\tgetTimeAllocated( timings, function ( slideEndTimingSeconds ) {\n\t\t\t\t\t\t\tvar slideEndTiming = slideEndTimingSeconds * 1000;\n\n\t\t\t\t\t\t\tcallRevealApi( 'getSlidePastCount', [], function ( currentSlide ) {\n\t\t\t\t\t\t\t\tvar currentSlideTiming = timings[currentSlide] * 1000;\n\t\t\t\t\t\t\t\tvar timeLeftCurrentSlide = slideEndTiming - diff;\n\t\t\t\t\t\t\t\tif (timeLeftCurrentSlide < 0) {\n\t\t\t\t\t\t\t\t\tpacingEl.className = 'pacing behind';\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\telse if (timeLeftCurrentSlide < currentSlideTiming) {\n\t\t\t\t\t\t\t\t\tpacingEl.className = 'pacing on-track';\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\telse {\n\t\t\t\t\t\t\t\t\tpacingEl.className = 'pacing ahead';\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t_displayTime( pacingHoursEl, pacingMinutesEl, pacingSecondsEl, timeLeftCurrentSlide );\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t} );\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Sets up the speaker view layout and layout selector.\n\t\t\t\t */\n\t\t\t\tfunction setupLayout() {\n\n\t\t\t\t\tlayoutDropdown = document.querySelector( '.speaker-layout-dropdown' );\n\t\t\t\t\tlayoutLabel = document.querySelector( '.speaker-layout-label' );\n\n\t\t\t\t\t// Render the list of available layouts\n\t\t\t\t\tfor( var id in SPEAKER_LAYOUTS ) {\n\t\t\t\t\t\tvar option = document.createElement( 'option' );\n\t\t\t\t\t\toption.setAttribute( 'value', id );\n\t\t\t\t\t\toption.textContent = SPEAKER_LAYOUTS[ id ];\n\t\t\t\t\t\tlayoutDropdown.appendChild( option );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Monitor the dropdown for changes\n\t\t\t\t\tlayoutDropdown.addEventListener( 'change', function( event ) {\n\n\t\t\t\t\t\tsetLayout( layoutDropdown.value );\n\n\t\t\t\t\t}, false );\n\n\t\t\t\t\t// Restore any currently persisted layout\n\t\t\t\t\tsetLayout( getLayout() );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Sets a new speaker view layout. The layout is persisted\n\t\t\t\t * in local storage.\n\t\t\t\t */\n\t\t\t\tfunction setLayout( value ) {\n\n\t\t\t\t\tvar title = SPEAKER_LAYOUTS[ value ];\n\n\t\t\t\t\tlayoutLabel.innerHTML = 'Layout' + ( title ? ( ': ' + title ) : '' );\n\t\t\t\t\tlayoutDropdown.value = value;\n\n\t\t\t\t\tdocument.body.setAttribute( 'data-speaker-layout', value );\n\n\t\t\t\t\t// Persist locally\n\t\t\t\t\tif( supportsLocalStorage() ) {\n\t\t\t\t\t\twindow.localStorage.setItem( 'reveal-speaker-layout', value );\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Returns the ID of the most recently set speaker layout\n\t\t\t\t * or our default layout if none has been set.\n\t\t\t\t */\n\t\t\t\tfunction getLayout() {\n\n\t\t\t\t\tif( supportsLocalStorage() ) {\n\t\t\t\t\t\tvar layout = window.localStorage.getItem( 'reveal-speaker-layout' );\n\t\t\t\t\t\tif( layout ) {\n\t\t\t\t\t\t\treturn layout;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\t// Default to the first record in the layouts hash\n\t\t\t\t\tfor( var id in SPEAKER_LAYOUTS ) {\n\t\t\t\t\t\treturn id;\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tfunction supportsLocalStorage() {\n\n\t\t\t\t\ttry {\n\t\t\t\t\t\tlocalStorage.setItem('test', 'test');\n\t\t\t\t\t\tlocalStorage.removeItem('test');\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t}\n\t\t\t\t\tcatch( e ) {\n\t\t\t\t\t\treturn false;\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tfunction zeroPadInteger( num ) {\n\n\t\t\t\t\tvar str = '00' + parseInt( num );\n\t\t\t\t\treturn str.substring( str.length - 2 );\n\n\t\t\t\t}\n\n\t\t\t\t/**\n\t\t\t\t * Limits the frequency at which a function can be called.\n\t\t\t\t */\n\t\t\t\tfunction debounce( fn, ms ) {\n\n\t\t\t\t\tvar lastTime = 0,\n\t\t\t\t\t\ttimeout;\n\n\t\t\t\t\treturn function() {\n\n\t\t\t\t\t\tvar args = arguments;\n\t\t\t\t\t\tvar context = this;\n\n\t\t\t\t\t\tclearTimeout( timeout );\n\n\t\t\t\t\t\tvar timeSinceLastCall = Date.now() - lastTime;\n\t\t\t\t\t\tif( timeSinceLastCall > ms ) {\n\t\t\t\t\t\t\tfn.apply( context, args );\n\t\t\t\t\t\t\tlastTime = Date.now();\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse {\n\t\t\t\t\t\t\ttimeout = setTimeout( function() {\n\t\t\t\t\t\t\t\tfn.apply( context, args );\n\t\t\t\t\t\t\t\tlastTime = Date.now();\n\t\t\t\t\t\t\t}, ms - timeSinceLastCall );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t})();\n\n\t\t<\/script>\n\t</body>\n</html>"),!n)return void alert("Speaker view popup failed to open. Please make sure popups are allowed and reopen the speaker view.");!function(){const i=e.getConfig().url,s="string"==typeof i?i:window.location.protocol+"//"+window.location.host+window.location.pathname+window.location.search;t=setInterval((function(){n.postMessage(JSON.stringify({namespace:"reveal-notes",type:"connect",state:e.getState(),url:s}),"*")}),500),window.addEventListener("message",r)}()}}function s(t){let i=e.getCurrentSlide(),s=i.querySelectorAll("aside.notes"),r=i.querySelector(".current-fragment"),a={namespace:"reveal-notes",type:"state",notes:"",markdown:!1,whitespace:"normal",state:e.getState()};if(i.hasAttribute("data-notes")&&(a.notes=i.getAttribute("data-notes"),a.whitespace="pre-wrap"),r){let t=r.querySelector("aside.notes");t?(a.notes=t.innerHTML,a.markdown="string"==typeof t.getAttribute("data-markdown"),s=null):r.hasAttribute("data-notes")&&(a.notes=r.getAttribute("data-notes"),a.whitespace="pre-wrap",s=null)}s&&s.length&&(s=Array.from(s).filter((t=>null===t.closest(".fragment"))),a.notes=s.map((t=>t.innerHTML)).join("\n"),a.markdown=s[0]&&"string"==typeof s[0].getAttribute("data-markdown")),n.postMessage(JSON.stringify(a),"*")}function r(i){if(function(t){try{return window.location.origin===t.source.location.origin}catch(t){return!1}}(i))try{let s=JSON.parse(i.data);s&&"reveal-notes"===s.namespace&&"connected"===s.type?(clearInterval(t),a()):s&&"reveal-notes"===s.namespace&&"call"===s.type&&function(t,i,s){let r=e[t].apply(e,i);n.postMessage(JSON.stringify({namespace:"reveal-notes",type:"return",result:r,callId:s}),"*")}(s.methodName,s.arguments,s.callId)}catch(t){}}function a(){e.on("slidechanged",s),e.on("fragmentshown",s),e.on("fragmenthidden",s),e.on("overviewhidden",s),e.on("overviewshown",s),e.on("paused",s),e.on("resumed",s),s()}return{id:"notes",init:function(t){e=t,/receiver/i.test(window.location.search)||(null!==window.location.search.match(/(\?|\&)notes/gi)?i():window.addEventListener("message",(t=>{if(!n&&"string"==typeof t.data){let i;try{i=JSON.parse(t.data)}catch(t){}i&&"reveal-notes"===i.namespace&&"heartbeat"===i.type&&(e=t.source,n&&!n.closed?n.focus():(n=e,window.addEventListener("message",r),a()))}var e})),e.addKeyBinding({keyCode:83,key:"S",description:"Speaker notes view"},(function(){i()})))},open:i}}}));
diff --git a/_freeze/site_libs/revealjs/plugin/notes/plugin.js b/_freeze/site_libs/revealjs/plugin/notes/plugin.js
@@ -0,0 +1,267 @@
+import speakerViewHTML from './speaker-view.html'
+
+import { marked } from 'marked';
+
+/**
+ * Handles opening of and synchronization with the reveal.js
+ * notes window.
+ *
+ * Handshake process:
+ * 1. This window posts 'connect' to notes window
+ * - Includes URL of presentation to show
+ * 2. Notes window responds with 'connected' when it is available
+ * 3. This window proceeds to send the current presentation state
+ * to the notes window
+ */
+const Plugin = () => {
+
+ let connectInterval;
+ let speakerWindow = null;
+ let deck;
+
+ /**
+ * Opens a new speaker view window.
+ */
+ function openSpeakerWindow() {
+
+ // If a window is already open, focus it
+ if( speakerWindow && !speakerWindow.closed ) {
+ speakerWindow.focus();
+ }
+ else {
+ speakerWindow = window.open( 'about:blank', 'reveal.js - Notes', 'width=1100,height=700' );
+ speakerWindow.marked = marked;
+ speakerWindow.document.write( speakerViewHTML );
+
+ if( !speakerWindow ) {
+ alert( 'Speaker view popup failed to open. Please make sure popups are allowed and reopen the speaker view.' );
+ return;
+ }
+
+ connect();
+ }
+
+ }
+
+ /**
+ * Reconnect with an existing speaker view window.
+ */
+ function reconnectSpeakerWindow( reconnectWindow ) {
+
+ if( speakerWindow && !speakerWindow.closed ) {
+ speakerWindow.focus();
+ }
+ else {
+ speakerWindow = reconnectWindow;
+ window.addEventListener( 'message', onPostMessage );
+ onConnected();
+ }
+
+ }
+
+ /**
+ * Connect to the notes window through a postmessage handshake.
+ * Using postmessage enables us to work in situations where the
+ * origins differ, such as a presentation being opened from the
+ * file system.
+ */
+ function connect() {
+
+ const presentationURL = deck.getConfig().url;
+
+ const url = typeof presentationURL === 'string' ? presentationURL :
+ window.location.protocol + '//' + window.location.host + window.location.pathname + window.location.search;
+
+ // Keep trying to connect until we get a 'connected' message back
+ connectInterval = setInterval( function() {
+ speakerWindow.postMessage( JSON.stringify( {
+ namespace: 'reveal-notes',
+ type: 'connect',
+ state: deck.getState(),
+ url
+ } ), '*' );
+ }, 500 );
+
+ window.addEventListener( 'message', onPostMessage );
+
+ }
+
+ /**
+ * Calls the specified Reveal.js method with the provided argument
+ * and then pushes the result to the notes frame.
+ */
+ function callRevealApi( methodName, methodArguments, callId ) {
+
+ let result = deck[methodName].apply( deck, methodArguments );
+ speakerWindow.postMessage( JSON.stringify( {
+ namespace: 'reveal-notes',
+ type: 'return',
+ result,
+ callId
+ } ), '*' );
+
+ }
+
+ /**
+ * Posts the current slide data to the notes window.
+ */
+ function post( event ) {
+
+ let slideElement = deck.getCurrentSlide(),
+ notesElements = slideElement.querySelectorAll( 'aside.notes' ),
+ fragmentElement = slideElement.querySelector( '.current-fragment' );
+
+ let messageData = {
+ namespace: 'reveal-notes',
+ type: 'state',
+ notes: '',
+ markdown: false,
+ whitespace: 'normal',
+ state: deck.getState()
+ };
+
+ // Look for notes defined in a slide attribute
+ if( slideElement.hasAttribute( 'data-notes' ) ) {
+ messageData.notes = slideElement.getAttribute( 'data-notes' );
+ messageData.whitespace = 'pre-wrap';
+ }
+
+ // Look for notes defined in a fragment
+ if( fragmentElement ) {
+ let fragmentNotes = fragmentElement.querySelector( 'aside.notes' );
+ if( fragmentNotes ) {
+ messageData.notes = fragmentNotes.innerHTML;
+ messageData.markdown = typeof fragmentNotes.getAttribute( 'data-markdown' ) === 'string';
+
+ // Ignore other slide notes
+ notesElements = null;
+ }
+ else if( fragmentElement.hasAttribute( 'data-notes' ) ) {
+ messageData.notes = fragmentElement.getAttribute( 'data-notes' );
+ messageData.whitespace = 'pre-wrap';
+
+ // In case there are slide notes
+ notesElements = null;
+ }
+ }
+
+ // Look for notes defined in an aside element
+ if( notesElements && notesElements.length ) {
+ // Ignore notes inside of fragments since those are shown
+ // individually when stepping through fragments
+ notesElements = Array.from( notesElements ).filter( notesElement => notesElement.closest( '.fragment' ) === null );
+
+ messageData.notes = notesElements.map( notesElement => notesElement.innerHTML ).join( '\n' );
+ messageData.markdown = notesElements[0] && typeof notesElements[0].getAttribute( 'data-markdown' ) === 'string';
+ }
+
+ speakerWindow.postMessage( JSON.stringify( messageData ), '*' );
+
+ }
+
+ /**
+ * Check if the given event is from the same origin as the
+ * current window.
+ */
+ function isSameOriginEvent( event ) {
+
+ try {
+ return window.location.origin === event.source.location.origin;
+ }
+ catch ( error ) {
+ return false;
+ }
+
+ }
+
+ function onPostMessage( event ) {
+
+ // Only allow same-origin messages
+ // (added 12/5/22 as a XSS safeguard)
+ if( isSameOriginEvent( event ) ) {
+
+ try {
+ let data = JSON.parse( event.data );
+ if( data && data.namespace === 'reveal-notes' && data.type === 'connected' ) {
+ clearInterval( connectInterval );
+ onConnected();
+ }
+ else if( data && data.namespace === 'reveal-notes' && data.type === 'call' ) {
+ callRevealApi( data.methodName, data.arguments, data.callId );
+ }
+ } catch (e) {}
+
+ }
+
+ }
+
+ /**
+ * Called once we have established a connection to the notes
+ * window.
+ */
+ function onConnected() {
+
+ // Monitor events that trigger a change in state
+ deck.on( 'slidechanged', post );
+ deck.on( 'fragmentshown', post );
+ deck.on( 'fragmenthidden', post );
+ deck.on( 'overviewhidden', post );
+ deck.on( 'overviewshown', post );
+ deck.on( 'paused', post );
+ deck.on( 'resumed', post );
+
+ // Post the initial state
+ post();
+
+ }
+
+ return {
+ id: 'notes',
+
+ init: function( reveal ) {
+
+ deck = reveal;
+
+ if( !/receiver/i.test( window.location.search ) ) {
+
+ // If the there's a 'notes' query set, open directly
+ if( window.location.search.match( /(\?|\&)notes/gi ) !== null ) {
+ openSpeakerWindow();
+ }
+ else {
+ // Keep listening for speaker view hearbeats. If we receive a
+ // heartbeat from an orphaned window, reconnect it. This ensures
+ // that we remain connected to the notes even if the presentation
+ // is reloaded.
+ window.addEventListener( 'message', event => {
+
+ if( !speakerWindow && typeof event.data === 'string' ) {
+ let data;
+
+ try {
+ data = JSON.parse( event.data );
+ }
+ catch( error ) {}
+
+ if( data && data.namespace === 'reveal-notes' && data.type === 'heartbeat' ) {
+ reconnectSpeakerWindow( event.source );
+ }
+ }
+ });
+ }
+
+ // Open the notes when the 's' key is hit
+ deck.addKeyBinding({keyCode: 83, key: 'S', description: 'Speaker notes view'}, function() {
+ openSpeakerWindow();
+ } );
+
+ }
+
+ },
+
+ open: openSpeakerWindow
+ };
+
+};
+
+export default Plugin;
diff --git a/_freeze/site_libs/revealjs/plugin/pdf-export/pdfexport.js b/_freeze/site_libs/revealjs/plugin/pdf-export/pdfexport.js
@@ -0,0 +1,115 @@
+var PdfExport = ( function( _Reveal ){
+
+ var Reveal = _Reveal;
+ var setStylesheet = null;
+ var installAltKeyBindings = null;
+
+ function getRevealJsPath(){
+ var regex = /\b[^/]+\/reveal.css$/i;
+ var script = Array.from( document.querySelectorAll( 'link' ) ).find( function( e ){
+ return e.attributes.href && e.attributes.href.value.search( regex ) >= 0;
+ });
+ if( !script ){
+ console.error( 'reveal.css could not be found in included <link> elements. Did you rename this file?' );
+ return '';
+ }
+ return script.attributes.href.value.replace( regex, '' );
+ }
+
+ function setStylesheet3( pdfExport ){
+ var link = document.querySelector( '#print' );
+ if( !link ){
+ link = document.createElement( 'link' );
+ link.rel = 'stylesheet';
+ link.id = 'print';
+ document.querySelector( 'head' ).appendChild( link );
+ }
+ var style = 'paper';
+ if( pdfExport ){
+ style = 'pdf';
+ }
+ link.href = getRevealJsPath() + 'css/print/' + style + '.css';
+ }
+
+ function setStylesheet4( pdfExport ){
+ }
+
+ function installAltKeyBindings3(){
+ }
+
+ function installAltKeyBindings4(){
+ if( isPrintingPDF() ){
+ var config = Reveal.getConfig();
+ var shortcut = config.pdfExportShortcut || 'E';
+ window.addEventListener( 'keydown', function( e ){
+ if( e.target.nodeName.toUpperCase() == 'BODY'
+ && ( e.key.toUpperCase() == shortcut.toUpperCase() || e.keyCode == shortcut.toUpperCase().charCodeAt( 0 ) ) ){
+ e.preventDefault();
+ togglePdfExport();
+ return false;
+ }
+ }, true );
+ }
+ }
+
+ function isPrintingPDF(){
+ return /print-pdf/gi.test(window.location.search) || /view=print/gi.test(window.location.search);
+ }
+
+ function togglePdfExport(){
+ var url_doc = new URL( document.URL );
+ var query_doc = new URLSearchParams( url_doc.searchParams );
+ if( isPrintingPDF() ){
+ if (query_doc.has('print-pdf')) {
+ query_doc.delete('print-pdf');
+ } else if (query_doc.has('view')) {
+ query_doc.delete('view');
+ }
+ }else{
+ query_doc.set( 'view', 'print' );
+ }
+ url_doc.search = ( query_doc.toString() ? '?' + query_doc.toString() : '' );
+ window.location.href = url_doc.toString();
+ }
+
+ function installKeyBindings(){
+ var config = Reveal.getConfig();
+ var shortcut = config.pdfExportShortcut || 'E';
+ Reveal.addKeyBinding({
+ keyCode: shortcut.toUpperCase().charCodeAt( 0 ),
+ key: shortcut.toUpperCase(),
+ description: 'PDF export mode'
+ }, togglePdfExport );
+ installAltKeyBindings();
+ }
+
+ function install(){
+ installKeyBindings();
+ setStylesheet( isPrintingPDF() );
+ }
+
+ var Plugin = {
+ }
+
+ if( Reveal && Reveal.VERSION && Reveal.VERSION.length && Reveal.VERSION[ 0 ] == '3' ){
+ // reveal 3.x
+ setStylesheet = setStylesheet3;
+ installAltKeyBindings = installAltKeyBindings3;
+ install();
+ }else{
+ // must be reveal 4.x
+ setStylesheet = setStylesheet4;
+ installAltKeyBindings = installAltKeyBindings4;
+ Plugin.id = 'pdf-export';
+ Plugin.init = function( _Reveal ){
+ Reveal = _Reveal;
+ install();
+ };
+ Plugin.togglePdfExport = function () {
+ togglePdfExport();
+ };
+ }
+
+ return Plugin;
+
+})( Reveal );
diff --git a/_freeze/site_libs/revealjs/plugin/pdf-export/plugin.yml b/_freeze/site_libs/revealjs/plugin/pdf-export/plugin.yml
@@ -0,0 +1,2 @@
+name: PdfExport
+script: pdfexport.js
diff --git a/_freeze/site_libs/revealjs/plugin/quarto-line-highlight/line-highlight.css b/_freeze/site_libs/revealjs/plugin/quarto-line-highlight/line-highlight.css
@@ -0,0 +1,31 @@
+.reveal
+ div.sourceCode
+ pre
+ code.has-line-highlights
+ > span:not(.highlight-line) {
+ opacity: 0.4;
+}
+
+.reveal pre.numberSource {
+ padding-left: 0;
+}
+
+.reveal pre.numberSource code > span {
+ left: -2.1em;
+}
+
+pre.numberSource code > span > a:first-child::before {
+ left: -0.7em;
+}
+
+.reveal pre > code:not(:first-child).fragment {
+ position: absolute;
+ top: 0;
+ left: 0;
+ width: 100%;
+ box-sizing: border-box;
+}
+
+.reveal div.sourceCode pre code {
+ min-height: 100%;
+}
diff --git a/_freeze/site_libs/revealjs/plugin/quarto-line-highlight/line-highlight.js b/_freeze/site_libs/revealjs/plugin/quarto-line-highlight/line-highlight.js
@@ -0,0 +1,351 @@
+window.QuartoLineHighlight = function () {
+ function isPrintView() {
+ return /print-pdf/gi.test(window.location.search) || /view=print/gi.test(window.location.search);
+ }
+
+ const delimiters = {
+ step: "|",
+ line: ",",
+ lineRange: "-",
+ };
+
+ const regex = new RegExp(
+ "^[\\d" + Object.values(delimiters).join("") + "]+$"
+ );
+
+ function handleLinesSelector(deck, attr) {
+ // if we are in printview with pdfSeparateFragments: false
+ // then we'll also want to supress
+ if (regex.test(attr)) {
+ if (isPrintView() && deck.getConfig().pdfSeparateFragments !== true) {
+ return false;
+ } else {
+ return true;
+ }
+ } else {
+ return false;
+ }
+ }
+
+ const kCodeLineNumbersAttr = "data-code-line-numbers";
+ const kFragmentIndex = "data-fragment-index";
+
+ function initQuartoLineHighlight(deck) {
+ const divSourceCode = deck
+ .getRevealElement()
+ .querySelectorAll("div.sourceCode");
+ // Process each div created by Pandoc highlighting - numbered line are already included.
+ divSourceCode.forEach((el) => {
+ if (el.hasAttribute(kCodeLineNumbersAttr)) {
+ const codeLineAttr = el.getAttribute(kCodeLineNumbersAttr);
+ el.removeAttribute(kCodeLineNumbersAttr);
+ if (handleLinesSelector(deck, codeLineAttr)) {
+ // Only process if attr is a string to select lines to highlights
+ // e.g "1|3,6|8-11"
+ const codeBlock = el.querySelectorAll("pre code");
+ codeBlock.forEach((code) => {
+ // move attributes on code block
+ code.setAttribute(kCodeLineNumbersAttr, codeLineAttr);
+
+ const scrollState = { currentBlock: code };
+
+ // Check if there are steps and duplicate code block accordingly
+ const highlightSteps = splitLineNumbers(codeLineAttr);
+ if (highlightSteps.length > 1) {
+ // If the original code block has a fragment-index,
+ // each clone should follow in an incremental sequence
+ let fragmentIndex = parseInt(
+ code.getAttribute(kFragmentIndex),
+ 10
+ );
+ fragmentIndex =
+ typeof fragmentIndex !== "number" || isNaN(fragmentIndex)
+ ? null
+ : fragmentIndex;
+
+ let stepN = 1;
+ highlightSteps.slice(1).forEach(
+ // Generate fragments for all steps except the original block
+ (step) => {
+ var fragmentBlock = code.cloneNode(true);
+ fragmentBlock.setAttribute(
+ "data-code-line-numbers",
+ joinLineNumbers([step])
+ );
+ fragmentBlock.classList.add("fragment");
+
+ // Pandoc sets id on spans we need to keep unique
+ fragmentBlock
+ .querySelectorAll(":scope > span")
+ .forEach((span) => {
+ if (span.hasAttribute("id")) {
+ span.setAttribute(
+ "id",
+ span.getAttribute("id").concat("-" + stepN)
+ );
+ }
+ });
+ stepN = ++stepN;
+
+ // Add duplicated <code> element after existing one
+ code.parentNode.appendChild(fragmentBlock);
+
+ // Each new <code> element is highlighted based on the new attributes value
+ highlightCodeBlock(fragmentBlock);
+
+ if (typeof fragmentIndex === "number") {
+ fragmentBlock.setAttribute(kFragmentIndex, fragmentIndex);
+ fragmentIndex += 1;
+ } else {
+ fragmentBlock.removeAttribute(kFragmentIndex);
+ }
+
+ // Scroll highlights into view as we step through them
+ fragmentBlock.addEventListener(
+ "visible",
+ scrollHighlightedLineIntoView.bind(
+ this,
+ fragmentBlock,
+ scrollState
+ )
+ );
+ fragmentBlock.addEventListener(
+ "hidden",
+ scrollHighlightedLineIntoView.bind(
+ this,
+ fragmentBlock.previousSibling,
+ scrollState
+ )
+ );
+ }
+ );
+ code.removeAttribute(kFragmentIndex);
+ code.setAttribute(
+ kCodeLineNumbersAttr,
+ joinLineNumbers([highlightSteps[0]])
+ );
+ }
+
+ // Scroll the first highlight into view when the slide becomes visible.
+ const slide =
+ typeof code.closest === "function"
+ ? code.closest("section:not(.stack)")
+ : null;
+ if (slide) {
+ const scrollFirstHighlightIntoView = function () {
+ scrollHighlightedLineIntoView(code, scrollState, true);
+ slide.removeEventListener(
+ "visible",
+ scrollFirstHighlightIntoView
+ );
+ };
+ slide.addEventListener("visible", scrollFirstHighlightIntoView);
+ }
+
+ highlightCodeBlock(code);
+ });
+ }
+ }
+ });
+ }
+
+ function highlightCodeBlock(codeBlock) {
+ const highlightSteps = splitLineNumbers(
+ codeBlock.getAttribute(kCodeLineNumbersAttr)
+ );
+
+ if (highlightSteps.length) {
+ // If we have at least one step, we generate fragments
+ highlightSteps[0].forEach((highlight) => {
+ // Add expected class on <pre> for reveal CSS
+ codeBlock.parentNode.classList.add("code-wrapper");
+
+ // Select lines to highlight
+ spanToHighlight = [];
+ if (typeof highlight.last === "number") {
+ spanToHighlight = [].slice.call(
+ codeBlock.querySelectorAll(
+ ":scope > span:nth-of-type(n+" +
+ highlight.first +
+ "):nth-of-type(-n+" +
+ highlight.last +
+ ")"
+ )
+ );
+ } else if (typeof highlight.first === "number") {
+ spanToHighlight = [].slice.call(
+ codeBlock.querySelectorAll(
+ ":scope > span:nth-of-type(" + highlight.first + ")"
+ )
+ );
+ }
+ if (spanToHighlight.length) {
+ // Add a class on <code> and <span> to select line to highlight
+ spanToHighlight.forEach((span) =>
+ span.classList.add("highlight-line")
+ );
+ codeBlock.classList.add("has-line-highlights");
+ }
+ });
+ }
+ }
+
+ /**
+ * Animates scrolling to the first highlighted line
+ * in the given code block.
+ */
+ function scrollHighlightedLineIntoView(block, scrollState, skipAnimation) {
+ window.cancelAnimationFrame(scrollState.animationFrameID);
+
+ // Match the scroll position of the currently visible
+ // code block
+ if (scrollState.currentBlock) {
+ block.scrollTop = scrollState.currentBlock.scrollTop;
+ }
+
+ // Remember the current code block so that we can match
+ // its scroll position when showing/hiding fragments
+ scrollState.currentBlock = block;
+
+ const highlightBounds = getHighlightedLineBounds(block);
+ let viewportHeight = block.offsetHeight;
+
+ // Subtract padding from the viewport height
+ const blockStyles = window.getComputedStyle(block);
+ viewportHeight -=
+ parseInt(blockStyles.paddingTop) + parseInt(blockStyles.paddingBottom);
+
+ // Scroll position which centers all highlights
+ const startTop = block.scrollTop;
+ let targetTop =
+ highlightBounds.top +
+ (Math.min(highlightBounds.bottom - highlightBounds.top, viewportHeight) -
+ viewportHeight) /
+ 2;
+
+ // Make sure the scroll target is within bounds
+ targetTop = Math.max(
+ Math.min(targetTop, block.scrollHeight - viewportHeight),
+ 0
+ );
+
+ if (skipAnimation === true || startTop === targetTop) {
+ block.scrollTop = targetTop;
+ } else {
+ // Don't attempt to scroll if there is no overflow
+ if (block.scrollHeight <= viewportHeight) return;
+
+ let time = 0;
+
+ const animate = function () {
+ time = Math.min(time + 0.02, 1);
+
+ // Update our eased scroll position
+ block.scrollTop =
+ startTop + (targetTop - startTop) * easeInOutQuart(time);
+
+ // Keep animating unless we've reached the end
+ if (time < 1) {
+ scrollState.animationFrameID = requestAnimationFrame(animate);
+ }
+ };
+
+ animate();
+ }
+ }
+
+ function getHighlightedLineBounds(block) {
+ const highlightedLines = block.querySelectorAll(".highlight-line");
+ if (highlightedLines.length === 0) {
+ return { top: 0, bottom: 0 };
+ } else {
+ const firstHighlight = highlightedLines[0];
+ const lastHighlight = highlightedLines[highlightedLines.length - 1];
+
+ return {
+ top: firstHighlight.offsetTop,
+ bottom: lastHighlight.offsetTop + lastHighlight.offsetHeight,
+ };
+ }
+ }
+
+ /**
+ * The easing function used when scrolling.
+ */
+ function easeInOutQuart(t) {
+ // easeInOutQuart
+ return t < 0.5 ? 8 * t * t * t * t : 1 - 8 * --t * t * t * t;
+ }
+
+ function splitLineNumbers(lineNumbersAttr) {
+ // remove space
+ lineNumbersAttr = lineNumbersAttr.replace("/s/g", "");
+ // seperate steps (for fragment)
+ lineNumbersAttr = lineNumbersAttr.split(delimiters.step);
+
+ // for each step, calculate first and last line, if any
+ return lineNumbersAttr.map((highlights) => {
+ // detect lines
+ const lines = highlights.split(delimiters.line);
+ return lines.map((range) => {
+ if (/^[\d-]+$/.test(range)) {
+ range = range.split(delimiters.lineRange);
+ const firstLine = parseInt(range[0], 10);
+ const lastLine = range[1] ? parseInt(range[1], 10) : undefined;
+ return {
+ first: firstLine,
+ last: lastLine,
+ };
+ } else {
+ return {};
+ }
+ });
+ });
+ }
+
+ function joinLineNumbers(splittedLineNumbers) {
+ return splittedLineNumbers
+ .map(function (highlights) {
+ return highlights
+ .map(function (highlight) {
+ // Line range
+ if (typeof highlight.last === "number") {
+ return highlight.first + delimiters.lineRange + highlight.last;
+ }
+ // Single line
+ else if (typeof highlight.first === "number") {
+ return highlight.first;
+ }
+ // All lines
+ else {
+ return "";
+ }
+ })
+ .join(delimiters.line);
+ })
+ .join(delimiters.step);
+ }
+
+ return {
+ id: "quarto-line-highlight",
+ init: function (deck) {
+ initQuartoLineHighlight(deck);
+
+ // If we're printing to PDF, scroll the code highlights of
+ // all blocks in the deck into view at once
+ deck.on("pdf-ready", function () {
+ [].slice
+ .call(
+ deck
+ .getRevealElement()
+ .querySelectorAll(
+ "pre code[data-code-line-numbers].current-fragment"
+ )
+ )
+ .forEach(function (block) {
+ scrollHighlightedLineIntoView(block, {}, true);
+ });
+ });
+ },
+ };
+};
diff --git a/_freeze/site_libs/revealjs/plugin/quarto-line-highlight/plugin.yml b/_freeze/site_libs/revealjs/plugin/quarto-line-highlight/plugin.yml
@@ -0,0 +1,4 @@
+# adapted from https://github.com/hakimel/reveal.js/tree/master/plugin/highlight
+name: QuartoLineHighlight
+script: line-highlight.js
+stylesheet: line-highlight.css
diff --git a/_freeze/site_libs/revealjs/plugin/quarto-support/footer.css b/_freeze/site_libs/revealjs/plugin/quarto-support/footer.css
@@ -0,0 +1,110 @@
+.reveal .slide-logo {
+ display: block;
+ position: fixed;
+ bottom: 0;
+ right: 12px;
+ max-height: 2.2rem;
+ height: 100%;
+ width: auto;
+ z-index: 2;
+}
+
+.reveal .footer {
+ display: block;
+ position: fixed;
+ bottom: 18px;
+ width: 100%;
+ margin: 0 auto;
+ text-align: center;
+ font-size: 18px;
+ z-index: 2;
+}
+
+.reveal .footer > * {
+ margin-top: 0;
+ margin-bottom: 0;
+}
+
+.reveal .slide .footer {
+ display: none;
+}
+
+.reveal .slide-number {
+ bottom: 10px;
+ right: 10px;
+ font-size: 16px;
+ background-color: transparent;
+}
+
+.reveal.has-logo .slide-number {
+ bottom: initial;
+ top: 8px;
+ right: 8px;
+}
+
+.reveal .slide-number .slide-number-delimiter {
+ margin: 0;
+}
+
+.reveal .slide-menu-button {
+ left: 8px;
+ bottom: 8px;
+}
+
+.reveal .slide-chalkboard-buttons {
+ position: fixed;
+ left: 12px;
+ bottom: 8px;
+ z-index: 30;
+ font-size: 24px;
+}
+
+.reveal .slide-chalkboard-buttons.slide-menu-offset {
+ left: 54px;
+}
+
+.reveal .slide-chalkboard-buttons > span {
+ margin-right: 14px;
+ cursor: pointer;
+}
+
+@media screen and (max-width: 800px) {
+ .reveal .slide-logo {
+ max-height: 1.1rem;
+ bottom: -2px;
+ right: 10px;
+ }
+ .reveal .footer {
+ font-size: 14px;
+ bottom: 12px;
+ }
+ .reveal .slide-number {
+ font-size: 12px;
+ bottom: 7px;
+ }
+ .reveal .slide-menu-button .fas::before {
+ height: 1.3rem;
+ width: 1.3rem;
+ vertical-align: -0.125em;
+ background-size: 1.3rem 1.3rem;
+ }
+
+ .reveal .slide-chalkboard-buttons .fas::before {
+ height: 0.95rem;
+ width: 0.95rem;
+ background-size: 0.95rem 0.95rem;
+ vertical-align: -0em;
+ }
+
+ .reveal .slide-chalkboard-buttons.slide-menu-offset {
+ left: 36px;
+ }
+ .reveal .slide-chalkboard-buttons > span {
+ margin-right: 9px;
+ }
+}
+
+html.print-pdf .reveal .slide-menu-button,
+html.print-pdf .reveal .slide-chalkboard-buttons {
+ display: none;
+}
diff --git a/_freeze/site_libs/revealjs/plugin/quarto-support/plugin.yml b/_freeze/site_libs/revealjs/plugin/quarto-support/plugin.yml
@@ -0,0 +1,5 @@
+name: QuartoSupport
+script: support.js
+stylesheet: footer.css
+config:
+ smaller: false
diff --git a/_freeze/site_libs/revealjs/plugin/quarto-support/support.js b/_freeze/site_libs/revealjs/plugin/quarto-support/support.js
@@ -0,0 +1,419 @@
+// catch all plugin for various quarto features
+window.QuartoSupport = function () {
+ function isPrintView() {
+ return /print-pdf/gi.test(window.location.search) || /view=print/gi.test(window.location.search);
+ }
+
+ // helper for theme toggling
+ function toggleBackgroundTheme(el, onDarkBackground, onLightBackground) {
+ if (onDarkBackground) {
+ el.classList.add('has-dark-background')
+ } else {
+ el.classList.remove('has-dark-background')
+ }
+ if (onLightBackground) {
+ el.classList.add('has-light-background')
+ } else {
+ el.classList.remove('has-light-background')
+ }
+ }
+
+ // implement controlsAudo
+ function controlsAuto(deck) {
+ const config = deck.getConfig();
+ if (config.controlsAuto === true) {
+ const iframe = window.location !== window.parent.location;
+ const localhost =
+ window.location.hostname === "localhost" ||
+ window.location.hostname === "127.0.0.1";
+ deck.configure({
+ controls:
+ (iframe && !localhost) ||
+ (deck.hasVerticalSlides() && config.navigationMode !== "linear"),
+ });
+ }
+ }
+
+ // helper to provide event handlers for all links in a container
+ function handleLinkClickEvents(deck, container) {
+ Array.from(container.querySelectorAll("a")).forEach((el) => {
+ const url = el.getAttribute("href");
+ if (/^(http|www)/gi.test(url)) {
+ el.addEventListener(
+ "click",
+ (ev) => {
+ const fullscreen = !!window.document.fullscreen;
+ const dataPreviewLink = el.getAttribute("data-preview-link");
+
+ // if there is a local specifcation then use that
+ if (dataPreviewLink) {
+ if (
+ dataPreviewLink === "true" ||
+ (dataPreviewLink === "auto" && fullscreen)
+ ) {
+ ev.preventDefault();
+ deck.showPreview(url);
+ return false;
+ }
+ } else {
+ const previewLinks = !!deck.getConfig().previewLinks;
+ const previewLinksAuto =
+ deck.getConfig().previewLinksAuto === true;
+ if (previewLinks == true || (previewLinksAuto && fullscreen)) {
+ ev.preventDefault();
+ deck.showPreview(url);
+ return false;
+ }
+ }
+
+ // if the deck is in an iframe we want to open it externally
+ // (don't do this when in vscode though as it has its own
+ // handler for opening links externally that will be play)
+ const iframe = window.location !== window.parent.location;
+ if (
+ iframe &&
+ !window.location.search.includes("quartoPreviewReqId=")
+ ) {
+ ev.preventDefault();
+ ev.stopImmediatePropagation();
+ window.open(url, "_blank");
+ return false;
+ }
+
+ // if the user has set data-preview-link to "auto" we need to handle the event
+ // (because reveal will interpret "auto" as true)
+ if (dataPreviewLink === "auto") {
+ ev.preventDefault();
+ ev.stopImmediatePropagation();
+ const target =
+ el.getAttribute("target") ||
+ (ev.ctrlKey || ev.metaKey ? "_blank" : "");
+ if (target) {
+ window.open(url, target);
+ } else {
+ window.location.href = url;
+ }
+ return false;
+ }
+ },
+ false
+ );
+ }
+ });
+ }
+
+ // implement previewLinksAuto
+ function previewLinksAuto(deck) {
+ handleLinkClickEvents(deck, deck.getRevealElement());
+ }
+
+ // apply styles
+ function applyGlobalStyles(deck) {
+ if (deck.getConfig()["smaller"] === true) {
+ const revealParent = deck.getRevealElement();
+ revealParent.classList.add("smaller");
+ }
+ }
+
+ // add logo image
+ function addLogoImage(deck) {
+ const revealParent = deck.getRevealElement();
+ const logoImg = document.querySelector(".slide-logo");
+ if (logoImg) {
+ revealParent.appendChild(logoImg);
+ revealParent.classList.add("has-logo");
+ }
+ }
+
+ // tweak slide-number element
+ function tweakSlideNumber(deck) {
+ deck.on("slidechanged", function (ev) {
+ // No slide number in scroll view
+ if (deck.isScrollView()) { return }
+ const revealParent = deck.getRevealElement();
+ const slideNumberEl = revealParent.querySelector(".slide-number");
+ const slideBackground = Reveal.getSlideBackground(ev.currentSlide);
+ const onDarkBackground = slideBackground.classList.contains('has-dark-background')
+ const onLightBackground = slideBackground.classList.contains('has-light-background')
+ toggleBackgroundTheme(slideNumberEl, onDarkBackground, onLightBackground);
+ })
+ }
+
+ // add footer text
+ function addFooter(deck) {
+ const revealParent = deck.getRevealElement();
+ const defaultFooterDiv = document.querySelector(".footer-default");
+ // Set per slide footer if any defined,
+ // or show default unless data-footer="false" for no footer on this slide
+ const setSlideFooter = (ev, defaultFooterDiv) => {
+ const currentSlideFooter = ev.currentSlide.querySelector(".footer");
+ const onDarkBackground = deck.getSlideBackground(ev.currentSlide).classList.contains('has-dark-background')
+ const onLightBackground = deck.getSlideBackground(ev.currentSlide).classList.contains('has-light-background')
+ if (currentSlideFooter) {
+ defaultFooterDiv.style.display = "none";
+ const slideFooter = currentSlideFooter.cloneNode(true);
+ handleLinkClickEvents(deck, slideFooter);
+ deck.getRevealElement().appendChild(slideFooter);
+ toggleBackgroundTheme(slideFooter, onDarkBackground, onLightBackground)
+ } else if (ev.currentSlide.getAttribute("data-footer") === "false") {
+ defaultFooterDiv.style.display = "none";
+ } else {
+ defaultFooterDiv.style.display = "block";
+ toggleBackgroundTheme(defaultFooterDiv, onDarkBackground, onLightBackground)
+ }
+ }
+ if (defaultFooterDiv) {
+ // move default footnote to the div.reveal element
+ revealParent.appendChild(defaultFooterDiv);
+ handleLinkClickEvents(deck, defaultFooterDiv);
+
+ if (!isPrintView()) {
+ // Ready even is needed so that footer customization applies on first loaded slide
+ deck.on('ready', (ev) => {
+ // Set footer (custom, default or none)
+ setSlideFooter(ev, defaultFooterDiv)
+ });
+ // Any new navigated new slide will get the custom footnote check
+ deck.on("slidechanged", function (ev) {
+ // Remove presentation footer defined by previous slide
+ const prevSlideFooter = document.querySelector(
+ ".reveal > .footer:not(.footer-default)"
+ );
+ if (prevSlideFooter) {
+ prevSlideFooter.remove();
+ }
+ // Set new one (custom, default or none)
+ setSlideFooter(ev, defaultFooterDiv)
+ });
+ }
+ }
+ }
+
+ // add chalkboard buttons
+ function addChalkboardButtons(deck) {
+ const chalkboard = deck.getPlugin("RevealChalkboard");
+ if (chalkboard && !isPrintView()) {
+ const revealParent = deck.getRevealElement();
+ const chalkboardDiv = document.createElement("div");
+ chalkboardDiv.classList.add("slide-chalkboard-buttons");
+ if (document.querySelector(".slide-menu-button")) {
+ chalkboardDiv.classList.add("slide-menu-offset");
+ }
+ // add buttons
+ const buttons = [
+ {
+ icon: "easel2",
+ title: "Toggle Chalkboard (b)",
+ onclick: chalkboard.toggleChalkboard,
+ },
+ {
+ icon: "brush",
+ title: "Toggle Notes Canvas (c)",
+ onclick: chalkboard.toggleNotesCanvas,
+ },
+ ];
+ buttons.forEach(function (button) {
+ const span = document.createElement("span");
+ span.title = button.title;
+ const icon = document.createElement("i");
+ icon.classList.add("fas");
+ icon.classList.add("fa-" + button.icon);
+ span.appendChild(icon);
+ span.onclick = function (event) {
+ event.preventDefault();
+ button.onclick();
+ };
+ chalkboardDiv.appendChild(span);
+ });
+ revealParent.appendChild(chalkboardDiv);
+ const config = deck.getConfig();
+ if (!config.chalkboard.buttons) {
+ chalkboardDiv.classList.add("hidden");
+ }
+
+ // show and hide chalkboard buttons on slidechange
+ deck.on("slidechanged", function (ev) {
+ const config = deck.getConfig();
+ let buttons = !!config.chalkboard.buttons;
+ const slideButtons = ev.currentSlide.getAttribute(
+ "data-chalkboard-buttons"
+ );
+ if (slideButtons) {
+ if (slideButtons === "true" || slideButtons === "1") {
+ buttons = true;
+ } else if (slideButtons === "false" || slideButtons === "0") {
+ buttons = false;
+ }
+ }
+ if (buttons) {
+ chalkboardDiv.classList.remove("hidden");
+ } else {
+ chalkboardDiv.classList.add("hidden");
+ }
+ });
+ }
+ }
+
+ function handleTabbyClicks() {
+ const tabs = document.querySelectorAll(".panel-tabset-tabby > li > a");
+ for (let i = 0; i < tabs.length; i++) {
+ const tab = tabs[i];
+ tab.onclick = function (ev) {
+ ev.preventDefault();
+ ev.stopPropagation();
+ return false;
+ };
+ }
+ }
+
+ function fixupForPrint(deck) {
+ if (isPrintView()) {
+ const slides = deck.getSlides();
+ slides.forEach(function (slide) {
+ slide.removeAttribute("data-auto-animate");
+ });
+ window.document.querySelectorAll(".hljs").forEach(function (el) {
+ el.classList.remove("hljs");
+ });
+ window.document.querySelectorAll(".hljs-ln-code").forEach(function (el) {
+ el.classList.remove("hljs-ln-code");
+ });
+ }
+ }
+
+ // dispatch for htmlwidgets
+ // they use slideenter event to trigger resize
+ const fireSlideEnter = () => {
+ const event = window.document.createEvent("Event");
+ event.initEvent("slideenter", true, true);
+ window.document.dispatchEvent(event);
+ };
+
+ // dispatch for shiny
+ // they use BS shown and hidden events to trigger rendering
+ const distpatchShinyEvents = (previous, current) => {
+ if (window.jQuery) {
+ if (previous) {
+ window.jQuery(previous).trigger("hidden");
+ }
+ if (current) {
+ window.jQuery(current).trigger("shown");
+ }
+ }
+ };
+
+ function handleSlideChanges(deck) {
+
+ const fireSlideChanged = (previousSlide, currentSlide) => {
+ fireSlideEnter();
+ distpatchShinyEvents(previousSlide, currentSlide);
+ };
+
+ deck.on("slidechanged", function (event) {
+ fireSlideChanged(event.previousSlide, event.currentSlide);
+ });
+ }
+
+ function handleTabbyChanges() {
+ const fireTabChanged = (previousTab, currentTab) => {
+ fireSlideEnter()
+ distpatchShinyEvents(previousTab, currentTab);
+ };
+ document.addEventListener("tabby", function(event) {
+ fireTabChanged(event.detail.previousTab, event.detail.tab);
+ }, false);
+ }
+
+ function workaroundMermaidDistance(deck) {
+ if (window.document.querySelector("pre.mermaid-js")) {
+ const slideCount = deck.getTotalSlides();
+ deck.configure({
+ mobileViewDistance: slideCount,
+ viewDistance: slideCount,
+ });
+ }
+ }
+
+ function handleWhiteSpaceInColumns(deck) {
+ for (const outerDiv of window.document.querySelectorAll("div.columns")) {
+ // remove all whitespace text nodes
+ // whitespace nodes cause the columns to be misaligned
+ // since they have inline-block layout
+ //
+ // Quarto emits no whitespace nodes, but third-party tooling
+ // has bugs that can cause whitespace nodes to be emitted.
+ // See https://github.com/quarto-dev/quarto-cli/issues/8382
+ for (const node of outerDiv.childNodes) {
+ if (node.nodeType === 3 && node.nodeValue.trim() === "") {
+ outerDiv.removeChild(node);
+ }
+ }
+ }
+ }
+
+ function cleanEmptyAutoGeneratedContent(deck) {
+ const div = document.querySelector('div.quarto-auto-generated-content')
+ if (div && div.textContent.trim() === '') {
+ div.remove()
+ }
+ }
+
+ // FIXME: Possibly remove this wrapper class when upstream trigger is fixed
+ // https://github.com/hakimel/reveal.js/issues/3688
+ // Currently, scrollActivationWidth needs to be unset for toggle to work
+ class ScrollViewToggler {
+ constructor(deck) {
+ this.deck = deck;
+ this.oldScrollActivationWidth = deck.getConfig()['scrollActivationWidth'];
+ }
+
+ toggleScrollViewWrapper() {
+ if (this.deck.isScrollView() === true) {
+ this.deck.configure({ scrollActivationWidth: this.oldScrollActivationWidth });
+ this.deck.toggleScrollView(false);
+ } else if (this.deck.isScrollView() === false) {
+ this.deck.configure({ scrollActivationWidth: null });
+ this.deck.toggleScrollView(true);
+ }
+ }
+ }
+
+ let scrollViewToggler;
+
+ function installScollViewKeyBindings(deck) {
+ var config = deck.getConfig();
+ var shortcut = config.scrollViewShortcut || 'R';
+ Reveal.addKeyBinding({
+ keyCode: shortcut.toUpperCase().charCodeAt( 0 ),
+ key: shortcut.toUpperCase(),
+ description: 'Scroll View Mode'
+ }, () => { scrollViewToggler.toggleScrollViewWrapper() } );
+ }
+
+ return {
+ id: "quarto-support",
+ init: function (deck) {
+ scrollViewToggler = new ScrollViewToggler(deck);
+ controlsAuto(deck);
+ previewLinksAuto(deck);
+ fixupForPrint(deck);
+ applyGlobalStyles(deck);
+ addLogoImage(deck);
+ tweakSlideNumber(deck);
+ addFooter(deck);
+ addChalkboardButtons(deck);
+ handleTabbyClicks();
+ handleTabbyChanges();
+ handleSlideChanges(deck);
+ workaroundMermaidDistance(deck);
+ handleWhiteSpaceInColumns(deck);
+ installScollViewKeyBindings(deck);
+ // should stay last
+ cleanEmptyAutoGeneratedContent(deck);
+ },
+ // Export for adding in menu
+ toggleScrollView: function() {
+ scrollViewToggler.toggleScrollViewWrapper();
+ }
+ };
+};
diff --git a/_freeze/site_libs/revealjs/plugin/reveal-menu/menu.css b/_freeze/site_libs/revealjs/plugin/reveal-menu/menu.css
@@ -0,0 +1,346 @@
+.slide-menu-wrapper {
+ font-family: 'Source Sans Pro', Helvetica, sans-serif;
+}
+
+.slide-menu-wrapper .slide-menu {
+ background-color: #333;
+ z-index: 200;
+ position: fixed;
+ top: 0;
+ width: 300px;
+ height: 100%;
+ /*overflow-y: scroll;*/
+ transition: transform 0.3s;
+ font-size: 16px;
+ font-weight: normal;
+}
+
+.slide-menu-wrapper .slide-menu.slide-menu--wide {
+ width: 500px;
+}
+
+.slide-menu-wrapper .slide-menu.slide-menu--third {
+ width: 33%;
+}
+
+.slide-menu-wrapper .slide-menu.slide-menu--half {
+ width: 50%;
+}
+
+.slide-menu-wrapper .slide-menu.slide-menu--full {
+ width: 95%;
+}
+
+/*
+ * Slides menu
+ */
+
+.slide-menu-wrapper .slide-menu-items {
+ margin: 0;
+ padding: 0;
+ width: 100%;
+ border-bottom: solid 1px #555;
+}
+
+.slide-menu-wrapper .slide-menu-item,
+.slide-menu-wrapper .slide-menu-item-vertical {
+ display: block;
+ text-align: left;
+ padding: 10px 18px;
+ color: #aaa;
+ cursor: pointer;
+}
+
+.slide-menu-wrapper .slide-menu-item-vertical {
+ padding-left: 30px;
+}
+
+.slide-menu-wrapper .slide-menu--wide .slide-menu-item-vertical,
+.slide-menu-wrapper .slide-menu--third .slide-menu-item-vertical,
+.slide-menu-wrapper .slide-menu--half .slide-menu-item-vertical,
+.slide-menu-wrapper .slide-menu--full .slide-menu-item-vertical,
+.slide-menu-wrapper .slide-menu--custom .slide-menu-item-vertical {
+ padding-left: 50px;
+}
+
+.slide-menu-wrapper .slide-menu-item {
+ border-top: solid 1px #555;
+}
+
+.slide-menu-wrapper .active-menu-panel li.selected {
+ background-color: #222;
+ color: white;
+}
+
+.slide-menu-wrapper .active-menu-panel li.active {
+ color: #eee;
+}
+
+.slide-menu-wrapper .slide-menu-item.no-title .slide-menu-item-title,
+.slide-menu-wrapper .slide-menu-item-vertical.no-title .slide-menu-item-title {
+ font-style: italic;
+}
+
+.slide-menu-wrapper .slide-menu-item-number {
+ color: #999;
+ padding-right: 6px;
+}
+
+.slide-menu-wrapper .slide-menu-item i.far,
+.slide-menu-wrapper .slide-menu-item i.fas,
+.slide-menu-wrapper .slide-menu-item-vertical i.far,
+.slide-menu-wrapper .slide-menu-item-vertical i.fas,
+.slide-menu-wrapper .slide-menu-item svg.svg-inline--fa,
+.slide-menu-wrapper .slide-menu-item-vertical svg.svg-inline--fa {
+ padding-right: 12px;
+ display: none;
+}
+
+.slide-menu-wrapper .slide-menu-item.past i.fas.past,
+.slide-menu-wrapper .slide-menu-item-vertical.past i.fas.past,
+.slide-menu-wrapper .slide-menu-item.active i.fas.active,
+.slide-menu-wrapper .slide-menu-item-vertical.active i.fas.active,
+.slide-menu-wrapper .slide-menu-item.future i.far.future,
+.slide-menu-wrapper .slide-menu-item-vertical.future i.far.future,
+.slide-menu-wrapper .slide-menu-item.past svg.svg-inline--fa.past,
+.slide-menu-wrapper .slide-menu-item-vertical.past svg.svg-inline--fa.past,
+.slide-menu-wrapper .slide-menu-item.active svg.svg-inline--fa.active,
+.slide-menu-wrapper .slide-menu-item-vertical.active svg.svg-inline--fa.active,
+.slide-menu-wrapper .slide-menu-item.future svg.svg-inline--fa.future,
+.slide-menu-wrapper .slide-menu-item-vertical.future svg.svg-inline--fa.future {
+ display: inline-block;
+}
+
+.slide-menu-wrapper .slide-menu-item.past i.fas.past,
+.slide-menu-wrapper .slide-menu-item-vertical.past i.fas.past,
+.slide-menu-wrapper .slide-menu-item.future i.far.future,
+.slide-menu-wrapper .slide-menu-item-vertical.future i.far.future,
+.slide-menu-wrapper .slide-menu-item.past svg.svg-inline--fa.past,
+.slide-menu-wrapper .slide-menu-item-vertical.past svg.svg-inline--fa.past,
+.slide-menu-wrapper .slide-menu-item.future svg.svg-inline--fa.future,
+.slide-menu-wrapper .slide-menu-item-vertical.future svg.svg-inline--fa.future {
+ opacity: 0.4;
+}
+
+.slide-menu-wrapper .slide-menu-item.active i.fas.active,
+.slide-menu-wrapper .slide-menu-item-vertical.active i.fas.active,
+.slide-menu-wrapper .slide-menu-item.active svg.svg-inline--fa.active,
+.slide-menu-wrapper .slide-menu-item-vertical.active svg.svg-inline--fa.active {
+ opacity: 0.8;
+}
+
+.slide-menu-wrapper .slide-menu--left {
+ left: 0;
+ -webkit-transform: translateX(-100%);
+ -ms-transform: translateX(-100%);
+ transform: translateX(-100%);
+}
+
+.slide-menu-wrapper .slide-menu--left.active {
+ -webkit-transform: translateX(0);
+ -ms-transform: translateX(0);
+ transform: translateX(0);
+}
+
+.slide-menu-wrapper .slide-menu--right {
+ right: 0;
+ -webkit-transform: translateX(100%);
+ -ms-transform: translateX(100%);
+ transform: translateX(100%);
+}
+
+.slide-menu-wrapper .slide-menu--right.active {
+ -webkit-transform: translateX(0);
+ -ms-transform: translateX(0);
+ transform: translateX(0);
+}
+
+.slide-menu-wrapper {
+ transition: transform 0.3s;
+}
+
+/*
+ * Toolbar
+ */
+.slide-menu-wrapper .slide-menu-toolbar {
+ height: 60px;
+ width: 100%;
+ font-size: 12px;
+ display: table;
+ table-layout: fixed; /* ensures equal width */
+ margin: 0;
+ padding: 0;
+ border-bottom: solid 2px #666;
+}
+
+.slide-menu-wrapper .slide-menu-toolbar > li {
+ display: table-cell;
+ line-height: 150%;
+ text-align: center;
+ vertical-align: middle;
+ cursor: pointer;
+ color: #aaa;
+ border-radius: 3px;
+}
+
+.slide-menu-wrapper .slide-menu-toolbar > li.toolbar-panel-button i,
+.slide-menu-wrapper
+ .slide-menu-toolbar
+ > li.toolbar-panel-button
+ svg.svg-inline--fa {
+ font-size: 1.7em;
+}
+
+.slide-menu-wrapper .slide-menu-toolbar > li.active-toolbar-button {
+ color: white;
+ text-shadow: 0 1px black;
+ text-decoration: underline;
+}
+
+.slide-menu-toolbar > li.toolbar-panel-button:hover {
+ color: white;
+}
+
+.slide-menu-toolbar
+ > li.toolbar-panel-button:hover
+ span.slide-menu-toolbar-label,
+.slide-menu-wrapper
+ .slide-menu-toolbar
+ > li.active-toolbar-button
+ span.slide-menu-toolbar-label {
+ visibility: visible;
+}
+
+/*
+ * Panels
+ */
+.slide-menu-wrapper .slide-menu-panel {
+ position: absolute;
+ width: 100%;
+ visibility: hidden;
+ height: calc(100% - 60px);
+ overflow-x: hidden;
+ overflow-y: auto;
+ color: #aaa;
+}
+
+.slide-menu-wrapper .slide-menu-panel.active-menu-panel {
+ visibility: visible;
+}
+
+.slide-menu-wrapper .slide-menu-panel h1,
+.slide-menu-wrapper .slide-menu-panel h2,
+.slide-menu-wrapper .slide-menu-panel h3,
+.slide-menu-wrapper .slide-menu-panel h4,
+.slide-menu-wrapper .slide-menu-panel h5,
+.slide-menu-wrapper .slide-menu-panel h6 {
+ margin: 20px 0 10px 0;
+ color: #fff;
+ line-height: 1.2;
+ letter-spacing: normal;
+ text-shadow: none;
+}
+
+.slide-menu-wrapper .slide-menu-panel h1 {
+ font-size: 1.6em;
+}
+.slide-menu-wrapper .slide-menu-panel h2 {
+ font-size: 1.4em;
+}
+.slide-menu-wrapper .slide-menu-panel h3 {
+ font-size: 1.3em;
+}
+.slide-menu-wrapper .slide-menu-panel h4 {
+ font-size: 1.1em;
+}
+.slide-menu-wrapper .slide-menu-panel h5 {
+ font-size: 1em;
+}
+.slide-menu-wrapper .slide-menu-panel h6 {
+ font-size: 0.9em;
+}
+
+.slide-menu-wrapper .slide-menu-panel p {
+ margin: 10px 0 5px 0;
+}
+
+.slide-menu-wrapper .slide-menu-panel a {
+ color: #ccc;
+ text-decoration: underline;
+}
+
+.slide-menu-wrapper .slide-menu-panel a:hover {
+ color: white;
+}
+
+.slide-menu-wrapper .slide-menu-item a {
+ text-decoration: none;
+}
+
+.slide-menu-wrapper .slide-menu-custom-panel {
+ width: calc(100% - 20px);
+ padding-left: 10px;
+ padding-right: 10px;
+}
+
+.slide-menu-wrapper .slide-menu-custom-panel .slide-menu-items {
+ width: calc(100% + 20px);
+ margin-left: -10px;
+ margin-right: 10px;
+}
+
+/*
+ * Theme and Transitions buttons
+ */
+
+.slide-menu-wrapper div[data-panel='Themes'] li,
+.slide-menu-wrapper div[data-panel='Transitions'] li {
+ display: block;
+ text-align: left;
+ cursor: pointer;
+ color: #848484;
+}
+
+/*
+ * Menu controls
+ */
+.reveal .slide-menu-button {
+ position: fixed;
+ left: 30px;
+ bottom: 30px;
+ z-index: 30;
+ font-size: 24px;
+}
+
+/*
+ * Menu overlay
+ */
+
+.slide-menu-wrapper .slide-menu-overlay {
+ position: fixed;
+ z-index: 199;
+ top: 0;
+ left: 0;
+ overflow: hidden;
+ width: 0;
+ height: 0;
+ background-color: #000;
+ opacity: 0;
+ transition: opacity 0.3s, width 0s 0.3s, height 0s 0.3s;
+}
+
+.slide-menu-wrapper .slide-menu-overlay.active {
+ width: 100%;
+ height: 100%;
+ opacity: 0.7;
+ transition: opacity 0.3s;
+}
+
+/*
+ * Hide menu for pdf printing
+ */
+body.print-pdf .slide-menu-wrapper .slide-menu,
+body.print-pdf .reveal .slide-menu-button,
+body.print-pdf .slide-menu-wrapper .slide-menu-overlay {
+ display: none;
+}
diff --git a/_freeze/site_libs/revealjs/plugin/reveal-menu/menu.js b/_freeze/site_libs/revealjs/plugin/reveal-menu/menu.js
@@ -0,0 +1 @@
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e=e||self).RevealMenu=t()}(this,(function(){"use strict";var e="undefined"!=typeof globalThis?globalThis:"undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:{};function t(e,t,n){return e(n={path:t,exports:{},require:function(e,t){return function(){throw new Error("Dynamic requires are not currently supported by @rollup/plugin-commonjs")}(null==t&&n.path)}},n.exports),n.exports}var n=function(e){return e&&e.Math==Math&&e},r=n("object"==typeof globalThis&&globalThis)||n("object"==typeof window&&window)||n("object"==typeof self&&self)||n("object"==typeof e&&e)||Function("return this")(),i=function(e){try{return!!e()}catch(e){return!0}},a=!i((function(){return 7!=Object.defineProperty({},1,{get:function(){return 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a=A("section",e);if(a.length>0)a.forEach((function(e,a){var o=i(0===a?"slide-menu-item":"slide-menu-item-vertical",e,r,t,a);o&&n.appendChild(o),r++}));else{var o=i("slide-menu-item",e,r,t);o&&n.appendChild(o),r++}})),A(".slide-menu-item, .slide-menu-item-vertical").forEach((function(e){e.onclick=x})),w()}}(),t.addEventListener("slidechanged",w),r.custom){var h=function(){this.status>=200&&this.status<300?(this.panel.innerHTML=this.responseText,C(this.panel)):I(this)},E=function(){I(this)},C=function(e){A("ul.slide-menu-items li.slide-menu-item",e).forEach((function(e,t){e.setAttribute("data-item",t+1),e.onclick=x,e.addEventListener("mouseenter",o)}))},I=function(e){var t="<p>ERROR: The attempt to fetch "+e.responseURL+" failed with HTTP status "+e.status+" ("+e.statusText+").</p><p>Remember that you need to serve the presentation HTML from a HTTP server.</p>";e.panel.innerHTML=t};r.custom.forEach((function(e,t,n){var r=k("div",{"data-panel":"Custom"+t,class:"slide-menu-panel 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R=k("div",{class:"slide-menu-button"}),j=k("a",{href:"#"});j.appendChild(k("i",{class:"fas fa-bars"})),R.appendChild(j),O(".reveal").appendChild(R),R.onclick=v}if(r.openSlideNumber)O("div.slide-number").onclick=v;A(".slide-menu-panel .slide-menu-items li").forEach((function(e){e.addEventListener("mouseenter",o)}))}if(r.keyboard){if(document.addEventListener("keydown",m,!1),window.addEventListener("message",(function(e){var t;try{t=JSON.parse(e.data)}catch(e){}t&&"triggerKey"===t.method&&m({keyCode:t.args[0],stopImmediatePropagation:function(){}})})),n.keyboardCondition&&"function"==typeof n.keyboardCondition){var N=n.keyboardCondition;n.keyboardCondition=function(e){return N(e)&&(!b()||77==e.keyCode)}}else n.keyboardCondition=function(e){return!b()||77==e.keyCode};t.addKeyBinding({keyCode:77,key:"M",description:"Toggle menu"},y)}r.openOnInit&&v(),a=!0}function O(e,t){return t||(t=document),t.querySelector(e)}function A(e,t){return t||(t=document),Array.prototype.slice.call(t.querySelectorAll(e))}function k(e,t,n){var r=document.createElement(e);return t&&Object.getOwnPropertyNames(t).forEach((function(e){r.setAttribute(e,t[e])})),n&&(r.innerHTML=n),r}function I(e,t){var n=O("link#"+e),r=n.parentElement,i=n.nextElementSibling;n.remove();var a=n.cloneNode();a.setAttribute("href",t),a.onload=function(){L()},r.insertBefore(a,i)}function P(e,t,n){n.call()}function M(){var e,a,o,s=!i||i>=9;t.isSpeakerNotes()&&window.location.search.endsWith("controls=false")&&(s=!1),s&&(r.delayInit||C(),e="menu-ready",(o=document.createEvent("HTMLEvents",1,2)).initEvent(e,!0,!0),function(e,t){for(var n in t)e[n]=t[n]}(o,a),document.querySelector(".reveal").dispatchEvent(o),n.postMessageEvents&&window.parent!==window.self&&window.parent.postMessage(JSON.stringify({namespace:"reveal",eventName:e,state:t.getState()}),"*"))}return{id:"menu",init:function(e){o(n=(t=e).getConfig()),P(r.path+"menu.css","stylesheet",(function(){void 0===r.loadIcons||r.loadIcons?P(r.path+"font-awesome/css/all.css","stylesheet",M):M()}))},toggle:y,openMenu:v,closeMenu:g,openPanel:S,isOpen:b,initialiseMenu:C,isMenuInitialised:function(){return a}}}}));
diff --git a/_freeze/site_libs/revealjs/plugin/reveal-menu/plugin.yml b/_freeze/site_libs/revealjs/plugin/reveal-menu/plugin.yml
@@ -0,0 +1,9 @@
+name: RevealMenu
+script: [menu.js, quarto-menu.js]
+stylesheet: [menu.css, quarto-menu.css]
+config:
+ menu:
+ side: "left"
+ useTextContentForMissingTitles: true
+ markers: false
+ loadIcons: false
diff --git a/_freeze/site_libs/revealjs/plugin/reveal-menu/quarto-menu.css b/_freeze/site_libs/revealjs/plugin/reveal-menu/quarto-menu.css
@@ -0,0 +1,68 @@
+.slide-menu-wrapper .slide-tool-item {
+ display: block;
+ text-align: left;
+ padding: 10px 18px;
+ color: #aaa;
+ cursor: pointer;
+ border-top: solid 1px #555;
+}
+
+.slide-menu-wrapper .slide-tool-item a {
+ text-decoration: none;
+}
+
+.slide-menu-wrapper .slide-tool-item kbd {
+ font-family: monospace;
+ margin-right: 10px;
+ padding: 3px 8px;
+ color: inherit;
+ border: 1px solid;
+ border-radius: 5px;
+ border-color: #555;
+}
+
+.slide-menu-wrapper .slide-menu-toolbar > li.active-toolbar-button {
+ text-decoration: none;
+}
+
+.reveal .slide-menu-button {
+ left: 8px;
+ bottom: 8px;
+}
+
+.reveal .slide-menu-button .fas::before,
+.reveal .slide-chalkboard-buttons .fas::before,
+.slide-menu-wrapper .slide-menu-toolbar .fas::before {
+ display: inline-block;
+ height: 2.2rem;
+ width: 2.2rem;
+ content: "";
+ vertical-align: -0.125em;
+ background-repeat: no-repeat;
+ background-size: 2.2rem 2.2rem;
+}
+
+.reveal .slide-chalkboard-buttons .fas::before {
+ height: 1.45rem;
+ width: 1.45rem;
+ background-size: 1.45rem 1.45rem;
+ vertical-align: 0.1em;
+}
+
+.slide-menu-wrapper .slide-menu-toolbar .fas::before {
+ height: 1.8rem;
+ width: 1.8rem;
+ background-size: 1.8rem 1.8rem;
+}
+
+.slide-menu-wrapper .slide-menu-toolbar .fa-images::before {
+ background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="white" class="bi bi-images" viewBox="0 0 16 16"><path d="M4.502 9a1.5 1.5 0 1 0 0-3 1.5 1.5 0 0 0 0 3z"/><path d="M14.002 13a2 2 0 0 1-2 2h-10a2 2 0 0 1-2-2V5A2 2 0 0 1 2 3a2 2 0 0 1 2-2h10a2 2 0 0 1 2 2v8a2 2 0 0 1-1.998 2zM14 2H4a1 1 0 0 0-1 1h9.002a2 2 0 0 1 2 2v7A1 1 0 0 0 15 11V3a1 1 0 0 0-1-1zM2.002 4a1 1 0 0 0-1 1v8l2.646-2.354a.5.5 0 0 1 .63-.062l2.66 1.773 3.71-3.71a.5.5 0 0 1 .577-.094l1.777 1.947V5a1 1 0 0 0-1-1h-10z"/></svg>');
+}
+
+.slide-menu-wrapper .slide-menu-toolbar .fa-gear::before {
+ background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="white" class="bi bi-gear" viewBox="0 0 16 16"><path d="M8 4.754a3.246 3.246 0 1 0 0 6.492 3.246 3.246 0 0 0 0-6.492zM5.754 8a2.246 2.246 0 1 1 4.492 0 2.246 2.246 0 0 1-4.492 0z"/><path d="M9.796 1.343c-.527-1.79-3.065-1.79-3.592 0l-.094.319a.873.873 0 0 1-1.255.52l-.292-.16c-1.64-.892-3.433.902-2.54 2.541l.159.292a.873.873 0 0 1-.52 1.255l-.319.094c-1.79.527-1.79 3.065 0 3.592l.319.094a.873.873 0 0 1 .52 1.255l-.16.292c-.892 1.64.901 3.434 2.541 2.54l.292-.159a.873.873 0 0 1 1.255.52l.094.319c.527 1.79 3.065 1.79 3.592 0l.094-.319a.873.873 0 0 1 1.255-.52l.292.16c1.64.893 3.434-.902 2.54-2.541l-.159-.292a.873.873 0 0 1 .52-1.255l.319-.094c1.79-.527 1.79-3.065 0-3.592l-.319-.094a.873.873 0 0 1-.52-1.255l.16-.292c.893-1.64-.902-3.433-2.541-2.54l-.292.159a.873.873 0 0 1-1.255-.52l-.094-.319zm-2.633.283c.246-.835 1.428-.835 1.674 0l.094.319a1.873 1.873 0 0 0 2.693 1.115l.291-.16c.764-.415 1.6.42 1.184 1.185l-.159.292a1.873 1.873 0 0 0 1.116 2.692l.318.094c.835.246.835 1.428 0 1.674l-.319.094a1.873 1.873 0 0 0-1.115 2.693l.16.291c.415.764-.42 1.6-1.185 1.184l-.291-.159a1.873 1.873 0 0 0-2.693 1.116l-.094.318c-.246.835-1.428.835-1.674 0l-.094-.319a1.873 1.873 0 0 0-2.692-1.115l-.292.16c-.764.415-1.6-.42-1.184-1.185l.159-.291A1.873 1.873 0 0 0 1.945 8.93l-.319-.094c-.835-.246-.835-1.428 0-1.674l.319-.094A1.873 1.873 0 0 0 3.06 4.377l-.16-.292c-.415-.764.42-1.6 1.185-1.184l.292.159a1.873 1.873 0 0 0 2.692-1.115l.094-.319z"/></svg>');
+}
+
+.slide-menu-wrapper .slide-menu-toolbar .fa-times::before {
+ background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="white" class="bi bi-x" viewBox="0 0 16 16"><path d="M4.646 4.646a.5.5 0 0 1 .708 0L8 7.293l2.646-2.647a.5.5 0 0 1 .708.708L8.707 8l2.647 2.646a.5.5 0 0 1-.708.708L8 8.707l-2.646 2.647a.5.5 0 0 1-.708-.708L7.293 8 4.646 5.354a.5.5 0 0 1 0-.708z"/></svg>');
+}
diff --git a/_freeze/site_libs/revealjs/plugin/reveal-menu/quarto-menu.js b/_freeze/site_libs/revealjs/plugin/reveal-menu/quarto-menu.js
@@ -0,0 +1,46 @@
+window.revealMenuToolHandler = function (handler) {
+ return function (event) {
+ event.preventDefault();
+ handler();
+ Reveal.getPlugin("menu").closeMenu();
+ };
+};
+
+window.RevealMenuToolHandlers = {
+ fullscreen: revealMenuToolHandler(function () {
+ const element = document.documentElement;
+ const requestMethod =
+ element.requestFullscreen ||
+ element.webkitRequestFullscreen ||
+ element.webkitRequestFullScreen ||
+ element.mozRequestFullScreen ||
+ element.msRequestFullscreen;
+ if (requestMethod) {
+ requestMethod.apply(element);
+ }
+ }),
+ speakerMode: revealMenuToolHandler(function () {
+ Reveal.getPlugin("notes").open();
+ }),
+ keyboardHelp: revealMenuToolHandler(function () {
+ Reveal.toggleHelp(true);
+ }),
+ overview: revealMenuToolHandler(function () {
+ Reveal.toggleOverview(true);
+ }),
+ toggleChalkboard: revealMenuToolHandler(function () {
+ RevealChalkboard.toggleChalkboard();
+ }),
+ toggleNotesCanvas: revealMenuToolHandler(function () {
+ RevealChalkboard.toggleNotesCanvas();
+ }),
+ downloadDrawings: revealMenuToolHandler(function () {
+ RevealChalkboard.download();
+ }),
+ togglePdfExport: revealMenuToolHandler(function () {
+ PdfExport.togglePdfExport();
+ }),
+ toggleScrollView: revealMenuToolHandler(function() {
+ Reveal.getPlugin("quarto-support").toggleScrollView();
+ })
+};
diff --git a/_freeze/site_libs/revealjs/plugin/search/plugin.js b/_freeze/site_libs/revealjs/plugin/search/plugin.js
@@ -0,0 +1,243 @@
+/*!
+ * Handles finding a text string anywhere in the slides and showing the next occurrence to the user
+ * by navigatating to that slide and highlighting it.
+ *
+ * @author Jon Snyder <snyder.jon@gmail.com>, February 2013
+ */
+
+const Plugin = () => {
+
+ // The reveal.js instance this plugin is attached to
+ let deck;
+
+ let searchElement;
+ let searchButton;
+ let searchInput;
+
+ let matchedSlides;
+ let currentMatchedIndex;
+ let searchboxDirty;
+ let hilitor;
+
+ function render() {
+
+ searchElement = document.createElement( 'div' );
+ searchElement.classList.add( 'searchbox' );
+ searchElement.style.position = 'absolute';
+ searchElement.style.top = '10px';
+ searchElement.style.right = '10px';
+ searchElement.style.zIndex = 10;
+
+ //embedded base64 search icon Designed by Sketchdock - http://www.sketchdock.com/:
+ searchElement.innerHTML = `<input type="search" class="searchinput" placeholder="Search..." style="vertical-align: top;"/>
+ </span>`;
+
+ searchInput = searchElement.querySelector( '.searchinput' );
+ searchInput.style.width = '240px';
+ searchInput.style.fontSize = '14px';
+ searchInput.style.padding = '4px 6px';
+ searchInput.style.color = '#000';
+ searchInput.style.background = '#fff';
+ searchInput.style.borderRadius = '2px';
+ searchInput.style.border = '0';
+ searchInput.style.outline = '0';
+ searchInput.style.boxShadow = '0 2px 18px rgba(0, 0, 0, 0.2)';
+ searchInput.style['-webkit-appearance'] = 'none';
+
+ deck.getRevealElement().appendChild( searchElement );
+
+ // searchButton.addEventListener( 'click', function(event) {
+ // doSearch();
+ // }, false );
+
+ searchInput.addEventListener( 'keyup', function( event ) {
+ switch (event.keyCode) {
+ case 13:
+ event.preventDefault();
+ doSearch();
+ searchboxDirty = false;
+ break;
+ default:
+ searchboxDirty = true;
+ }
+ }, false );
+
+ closeSearch();
+
+ }
+
+ function openSearch() {
+ if( !searchElement ) render();
+
+ searchElement.style.display = 'inline';
+ searchInput.focus();
+ searchInput.select();
+ }
+
+ function closeSearch() {
+ if( !searchElement ) render();
+
+ searchElement.style.display = 'none';
+ if(hilitor) hilitor.remove();
+ }
+
+ function toggleSearch() {
+ if( !searchElement ) render();
+
+ if (searchElement.style.display !== 'inline') {
+ openSearch();
+ }
+ else {
+ closeSearch();
+ }
+ }
+
+ function doSearch() {
+ //if there's been a change in the search term, perform a new search:
+ if (searchboxDirty) {
+ var searchstring = searchInput.value;
+
+ if (searchstring === '') {
+ if(hilitor) hilitor.remove();
+ matchedSlides = null;
+ }
+ else {
+ //find the keyword amongst the slides
+ hilitor = new Hilitor("slidecontent");
+ matchedSlides = hilitor.apply(searchstring);
+ currentMatchedIndex = 0;
+ }
+ }
+
+ if (matchedSlides) {
+ //navigate to the next slide that has the keyword, wrapping to the first if necessary
+ if (matchedSlides.length && (matchedSlides.length <= currentMatchedIndex)) {
+ currentMatchedIndex = 0;
+ }
+ if (matchedSlides.length > currentMatchedIndex) {
+ deck.slide(matchedSlides[currentMatchedIndex].h, matchedSlides[currentMatchedIndex].v);
+ currentMatchedIndex++;
+ }
+ }
+ }
+
+ // Original JavaScript code by Chirp Internet: www.chirp.com.au
+ // Please acknowledge use of this code by including this header.
+ // 2/2013 jon: modified regex to display any match, not restricted to word boundaries.
+ function Hilitor(id, tag) {
+
+ var targetNode = document.getElementById(id) || document.body;
+ var hiliteTag = tag || "EM";
+ var skipTags = new RegExp("^(?:" + hiliteTag + "|SCRIPT|FORM)$");
+ var colors = ["#ff6", "#a0ffff", "#9f9", "#f99", "#f6f"];
+ var wordColor = [];
+ var colorIdx = 0;
+ var matchRegex = "";
+ var matchingSlides = [];
+
+ this.setRegex = function(input)
+ {
+ input = input.trim();
+ matchRegex = new RegExp("(" + input + ")","i");
+ }
+
+ this.getRegex = function()
+ {
+ return matchRegex.toString().replace(/^\/\\b\(|\)\\b\/i$/g, "").replace(/\|/g, " ");
+ }
+
+ // recursively apply word highlighting
+ this.hiliteWords = function(node)
+ {
+ if(node == undefined || !node) return;
+ if(!matchRegex) return;
+ if(skipTags.test(node.nodeName)) return;
+
+ if(node.hasChildNodes()) {
+ for(var i=0; i < node.childNodes.length; i++)
+ this.hiliteWords(node.childNodes[i]);
+ }
+ if(node.nodeType == 3) { // NODE_TEXT
+ var nv, regs;
+ if((nv = node.nodeValue) && (regs = matchRegex.exec(nv))) {
+ //find the slide's section element and save it in our list of matching slides
+ var secnode = node;
+ while (secnode != null && secnode.nodeName != 'SECTION') {
+ secnode = secnode.parentNode;
+ }
+
+ var slideIndex = deck.getIndices(secnode);
+ var slidelen = matchingSlides.length;
+ var alreadyAdded = false;
+ for (var i=0; i < slidelen; i++) {
+ if ( (matchingSlides[i].h === slideIndex.h) && (matchingSlides[i].v === slideIndex.v) ) {
+ alreadyAdded = true;
+ }
+ }
+ if (! alreadyAdded) {
+ matchingSlides.push(slideIndex);
+ }
+
+ if(!wordColor[regs[0].toLowerCase()]) {
+ wordColor[regs[0].toLowerCase()] = colors[colorIdx++ % colors.length];
+ }
+
+ var match = document.createElement(hiliteTag);
+ match.appendChild(document.createTextNode(regs[0]));
+ match.style.backgroundColor = wordColor[regs[0].toLowerCase()];
+ match.style.fontStyle = "inherit";
+ match.style.color = "#000";
+
+ var after = node.splitText(regs.index);
+ after.nodeValue = after.nodeValue.substring(regs[0].length);
+ node.parentNode.insertBefore(match, after);
+ }
+ }
+ };
+
+ // remove highlighting
+ this.remove = function()
+ {
+ var arr = document.getElementsByTagName(hiliteTag);
+ var el;
+ while(arr.length && (el = arr[0])) {
+ el.parentNode.replaceChild(el.firstChild, el);
+ }
+ };
+
+ // start highlighting at target node
+ this.apply = function(input)
+ {
+ if(input == undefined || !input) return;
+ this.remove();
+ this.setRegex(input);
+ this.hiliteWords(targetNode);
+ return matchingSlides;
+ };
+
+ }
+
+ return {
+
+ id: 'search',
+
+ init: reveal => {
+
+ deck = reveal;
+ deck.registerKeyboardShortcut( 'CTRL + Shift + F', 'Search' );
+
+ document.addEventListener( 'keydown', function( event ) {
+ if( event.key == "F" && (event.ctrlKey || event.metaKey) ) { //Control+Shift+f
+ event.preventDefault();
+ toggleSearch();
+ }
+ }, false );
+
+ },
+
+ open: openSearch
+
+ }
+};
+
+export default Plugin;
+\ No newline at end of file
diff --git a/_freeze/site_libs/revealjs/plugin/search/search.esm.js b/_freeze/site_libs/revealjs/plugin/search/search.esm.js
@@ -0,0 +1,7 @@
+/*!
+ * Handles finding a text string anywhere in the slides and showing the next occurrence to the user
+ * by navigatating to that slide and highlighting it.
+ *
+ * @author Jon Snyder <snyder.jon@gmail.com>, February 2013
+ */
+const e=()=>{let e,t,n,l,i,o,r;function s(){t=document.createElement("div"),t.classList.add("searchbox"),t.style.position="absolute",t.style.top="10px",t.style.right="10px",t.style.zIndex=10,t.innerHTML='<input type="search" class="searchinput" placeholder="Search..." style="vertical-align: top;"/>\n\t\t</span>',n=t.querySelector(".searchinput"),n.style.width="240px",n.style.fontSize="14px",n.style.padding="4px 6px",n.style.color="#000",n.style.background="#fff",n.style.borderRadius="2px",n.style.border="0",n.style.outline="0",n.style.boxShadow="0 2px 18px rgba(0, 0, 0, 0.2)",n.style["-webkit-appearance"]="none",e.getRevealElement().appendChild(t),n.addEventListener("keyup",(function(t){if(13===t.keyCode)t.preventDefault(),function(){if(o){var t=n.value;""===t?(r&&r.remove(),l=null):(r=new c("slidecontent"),l=r.apply(t),i=0)}l&&(l.length&&l.length<=i&&(i=0),l.length>i&&(e.slide(l[i].h,l[i].v),i++))}(),o=!1;else o=!0}),!1),d()}function a(){t||s(),t.style.display="inline",n.focus(),n.select()}function d(){t||s(),t.style.display="none",r&&r.remove()}function c(t,n){var l=document.getElementById(t)||document.body,i=n||"EM",o=new RegExp("^(?:"+i+"|SCRIPT|FORM)$"),r=["#ff6","#a0ffff","#9f9","#f99","#f6f"],s=[],a=0,d="",c=[];this.setRegex=function(e){e=e.trim(),d=new RegExp("("+e+")","i")},this.getRegex=function(){return d.toString().replace(/^\/\\b\(|\)\\b\/i$/g,"").replace(/\|/g," ")},this.hiliteWords=function(t){if(null!=t&&t&&d&&!o.test(t.nodeName)){if(t.hasChildNodes())for(var n=0;n<t.childNodes.length;n++)this.hiliteWords(t.childNodes[n]);var l,p;if(3==t.nodeType)if((l=t.nodeValue)&&(p=d.exec(l))){for(var u=t;null!=u&&"SECTION"!=u.nodeName;)u=u.parentNode;var h=e.getIndices(u),f=c.length,y=!1;for(n=0;n<f;n++)c[n].h===h.h&&c[n].v===h.v&&(y=!0);y||c.push(h),s[p[0].toLowerCase()]||(s[p[0].toLowerCase()]=r[a++%r.length]);var g=document.createElement(i);g.appendChild(document.createTextNode(p[0])),g.style.backgroundColor=s[p[0].toLowerCase()],g.style.fontStyle="inherit",g.style.color="#000";var v=t.splitText(p.index);v.nodeValue=v.nodeValue.substring(p[0].length),t.parentNode.insertBefore(g,v)}}},this.remove=function(){for(var e,t=document.getElementsByTagName(i);t.length&&(e=t[0]);)e.parentNode.replaceChild(e.firstChild,e)},this.apply=function(e){if(null!=e&&e)return this.remove(),this.setRegex(e),this.hiliteWords(l),c}}return{id:"search",init:n=>{e=n,e.registerKeyboardShortcut("CTRL + Shift + F","Search"),document.addEventListener("keydown",(function(e){"F"==e.key&&(e.ctrlKey||e.metaKey)&&(e.preventDefault(),t||s(),"inline"!==t.style.display?a():d())}),!1)},open:a}};export{e as default};
diff --git a/_freeze/site_libs/revealjs/plugin/search/search.js b/_freeze/site_libs/revealjs/plugin/search/search.js
@@ -0,0 +1,7 @@
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e="undefined"!=typeof globalThis?globalThis:e||self).RevealSearch=t()}(this,(function(){"use strict";
+/*!
+ * Handles finding a text string anywhere in the slides and showing the next occurrence to the user
+ * by navigatating to that slide and highlighting it.
+ *
+ * @author Jon Snyder <snyder.jon@gmail.com>, February 2013
+ */return()=>{let e,t,n,i,o,l,r;function s(){t=document.createElement("div"),t.classList.add("searchbox"),t.style.position="absolute",t.style.top="10px",t.style.right="10px",t.style.zIndex=10,t.innerHTML='<input type="search" class="searchinput" placeholder="Search..." style="vertical-align: top;"/>\n\t\t</span>',n=t.querySelector(".searchinput"),n.style.width="240px",n.style.fontSize="14px",n.style.padding="4px 6px",n.style.color="#000",n.style.background="#fff",n.style.borderRadius="2px",n.style.border="0",n.style.outline="0",n.style.boxShadow="0 2px 18px rgba(0, 0, 0, 0.2)",n.style["-webkit-appearance"]="none",e.getRevealElement().appendChild(t),n.addEventListener("keyup",(function(t){if(13===t.keyCode)t.preventDefault(),function(){if(l){var t=n.value;""===t?(r&&r.remove(),i=null):(r=new c("slidecontent"),i=r.apply(t),o=0)}i&&(i.length&&i.length<=o&&(o=0),i.length>o&&(e.slide(i[o].h,i[o].v),o++))}(),l=!1;else l=!0}),!1),d()}function a(){t||s(),t.style.display="inline",n.focus(),n.select()}function d(){t||s(),t.style.display="none",r&&r.remove()}function c(t,n){var i=document.getElementById(t)||document.body,o=n||"EM",l=new RegExp("^(?:"+o+"|SCRIPT|FORM)$"),r=["#ff6","#a0ffff","#9f9","#f99","#f6f"],s=[],a=0,d="",c=[];this.setRegex=function(e){e=e.trim(),d=new RegExp("("+e+")","i")},this.getRegex=function(){return d.toString().replace(/^\/\\b\(|\)\\b\/i$/g,"").replace(/\|/g," ")},this.hiliteWords=function(t){if(null!=t&&t&&d&&!l.test(t.nodeName)){if(t.hasChildNodes())for(var n=0;n<t.childNodes.length;n++)this.hiliteWords(t.childNodes[n]);var i,f;if(3==t.nodeType)if((i=t.nodeValue)&&(f=d.exec(i))){for(var u=t;null!=u&&"SECTION"!=u.nodeName;)u=u.parentNode;var p=e.getIndices(u),h=c.length,y=!1;for(n=0;n<h;n++)c[n].h===p.h&&c[n].v===p.v&&(y=!0);y||c.push(p),s[f[0].toLowerCase()]||(s[f[0].toLowerCase()]=r[a++%r.length]);var g=document.createElement(o);g.appendChild(document.createTextNode(f[0])),g.style.backgroundColor=s[f[0].toLowerCase()],g.style.fontStyle="inherit",g.style.color="#000";var v=t.splitText(f.index);v.nodeValue=v.nodeValue.substring(f[0].length),t.parentNode.insertBefore(g,v)}}},this.remove=function(){for(var e,t=document.getElementsByTagName(o);t.length&&(e=t[0]);)e.parentNode.replaceChild(e.firstChild,e)},this.apply=function(e){if(null!=e&&e)return this.remove(),this.setRegex(e),this.hiliteWords(i),c}}return{id:"search",init:n=>{e=n,e.registerKeyboardShortcut("CTRL + Shift + F","Search"),document.addEventListener("keydown",(function(e){"F"==e.key&&(e.ctrlKey||e.metaKey)&&(e.preventDefault(),t||s(),"inline"!==t.style.display?a():d())}),!1)},open:a}}}));
diff --git a/_freeze/site_libs/revealjs/plugin/zoom/plugin.js b/_freeze/site_libs/revealjs/plugin/zoom/plugin.js
@@ -0,0 +1,264 @@
+/*!
+ * reveal.js Zoom plugin
+ */
+const Plugin = {
+
+ id: 'zoom',
+
+ init: function( reveal ) {
+
+ reveal.getRevealElement().addEventListener( 'mousedown', function( event ) {
+ var defaultModifier = /Linux/.test( window.navigator.platform ) ? 'ctrl' : 'alt';
+
+ var modifier = ( reveal.getConfig().zoomKey ? reveal.getConfig().zoomKey : defaultModifier ) + 'Key';
+ var zoomLevel = ( reveal.getConfig().zoomLevel ? reveal.getConfig().zoomLevel : 2 );
+
+ if( event[ modifier ] && !reveal.isOverview() ) {
+ event.preventDefault();
+
+ zoom.to({
+ x: event.clientX,
+ y: event.clientY,
+ scale: zoomLevel,
+ pan: false
+ });
+ }
+ } );
+
+ },
+
+ destroy: () => {
+
+ zoom.reset();
+
+ }
+
+};
+
+export default () => Plugin;
+
+/*!
+ * zoom.js 0.3 (modified for use with reveal.js)
+ * http://lab.hakim.se/zoom-js
+ * MIT licensed
+ *
+ * Copyright (C) 2011-2014 Hakim El Hattab, http://hakim.se
+ */
+var zoom = (function(){
+
+ // The current zoom level (scale)
+ var level = 1;
+
+ // The current mouse position, used for panning
+ var mouseX = 0,
+ mouseY = 0;
+
+ // Timeout before pan is activated
+ var panEngageTimeout = -1,
+ panUpdateInterval = -1;
+
+ // Check for transform support so that we can fallback otherwise
+ var supportsTransforms = 'transform' in document.body.style;
+
+ if( supportsTransforms ) {
+ // The easing that will be applied when we zoom in/out
+ document.body.style.transition = 'transform 0.8s ease';
+ }
+
+ // Zoom out if the user hits escape
+ document.addEventListener( 'keyup', function( event ) {
+ if( level !== 1 && event.keyCode === 27 ) {
+ zoom.out();
+ }
+ } );
+
+ // Monitor mouse movement for panning
+ document.addEventListener( 'mousemove', function( event ) {
+ if( level !== 1 ) {
+ mouseX = event.clientX;
+ mouseY = event.clientY;
+ }
+ } );
+
+ /**
+ * Applies the CSS required to zoom in, prefers the use of CSS3
+ * transforms but falls back on zoom for IE.
+ *
+ * @param {Object} rect
+ * @param {Number} scale
+ */
+ function magnify( rect, scale ) {
+
+ var scrollOffset = getScrollOffset();
+
+ // Ensure a width/height is set
+ rect.width = rect.width || 1;
+ rect.height = rect.height || 1;
+
+ // Center the rect within the zoomed viewport
+ rect.x -= ( window.innerWidth - ( rect.width * scale ) ) / 2;
+ rect.y -= ( window.innerHeight - ( rect.height * scale ) ) / 2;
+
+ if( supportsTransforms ) {
+ // Reset
+ if( scale === 1 ) {
+ document.body.style.transform = '';
+ }
+ // Scale
+ else {
+ var origin = scrollOffset.x +'px '+ scrollOffset.y +'px',
+ transform = 'translate('+ -rect.x +'px,'+ -rect.y +'px) scale('+ scale +')';
+
+ document.body.style.transformOrigin = origin;
+ document.body.style.transform = transform;
+ }
+ }
+ else {
+ // Reset
+ if( scale === 1 ) {
+ document.body.style.position = '';
+ document.body.style.left = '';
+ document.body.style.top = '';
+ document.body.style.width = '';
+ document.body.style.height = '';
+ document.body.style.zoom = '';
+ }
+ // Scale
+ else {
+ document.body.style.position = 'relative';
+ document.body.style.left = ( - ( scrollOffset.x + rect.x ) / scale ) + 'px';
+ document.body.style.top = ( - ( scrollOffset.y + rect.y ) / scale ) + 'px';
+ document.body.style.width = ( scale * 100 ) + '%';
+ document.body.style.height = ( scale * 100 ) + '%';
+ document.body.style.zoom = scale;
+ }
+ }
+
+ level = scale;
+
+ if( document.documentElement.classList ) {
+ if( level !== 1 ) {
+ document.documentElement.classList.add( 'zoomed' );
+ }
+ else {
+ document.documentElement.classList.remove( 'zoomed' );
+ }
+ }
+ }
+
+ /**
+ * Pan the document when the mosue cursor approaches the edges
+ * of the window.
+ */
+ function pan() {
+ var range = 0.12,
+ rangeX = window.innerWidth * range,
+ rangeY = window.innerHeight * range,
+ scrollOffset = getScrollOffset();
+
+ // Up
+ if( mouseY < rangeY ) {
+ window.scroll( scrollOffset.x, scrollOffset.y - ( 1 - ( mouseY / rangeY ) ) * ( 14 / level ) );
+ }
+ // Down
+ else if( mouseY > window.innerHeight - rangeY ) {
+ window.scroll( scrollOffset.x, scrollOffset.y + ( 1 - ( window.innerHeight - mouseY ) / rangeY ) * ( 14 / level ) );
+ }
+
+ // Left
+ if( mouseX < rangeX ) {
+ window.scroll( scrollOffset.x - ( 1 - ( mouseX / rangeX ) ) * ( 14 / level ), scrollOffset.y );
+ }
+ // Right
+ else if( mouseX > window.innerWidth - rangeX ) {
+ window.scroll( scrollOffset.x + ( 1 - ( window.innerWidth - mouseX ) / rangeX ) * ( 14 / level ), scrollOffset.y );
+ }
+ }
+
+ function getScrollOffset() {
+ return {
+ x: window.scrollX !== undefined ? window.scrollX : window.pageXOffset,
+ y: window.scrollY !== undefined ? window.scrollY : window.pageYOffset
+ }
+ }
+
+ return {
+ /**
+ * Zooms in on either a rectangle or HTML element.
+ *
+ * @param {Object} options
+ * - element: HTML element to zoom in on
+ * OR
+ * - x/y: coordinates in non-transformed space to zoom in on
+ * - width/height: the portion of the screen to zoom in on
+ * - scale: can be used instead of width/height to explicitly set scale
+ */
+ to: function( options ) {
+
+ // Due to an implementation limitation we can't zoom in
+ // to another element without zooming out first
+ if( level !== 1 ) {
+ zoom.out();
+ }
+ else {
+ options.x = options.x || 0;
+ options.y = options.y || 0;
+
+ // If an element is set, that takes precedence
+ if( !!options.element ) {
+ // Space around the zoomed in element to leave on screen
+ var padding = 20;
+ var bounds = options.element.getBoundingClientRect();
+
+ options.x = bounds.left - padding;
+ options.y = bounds.top - padding;
+ options.width = bounds.width + ( padding * 2 );
+ options.height = bounds.height + ( padding * 2 );
+ }
+
+ // If width/height values are set, calculate scale from those values
+ if( options.width !== undefined && options.height !== undefined ) {
+ options.scale = Math.max( Math.min( window.innerWidth / options.width, window.innerHeight / options.height ), 1 );
+ }
+
+ if( options.scale > 1 ) {
+ options.x *= options.scale;
+ options.y *= options.scale;
+
+ magnify( options, options.scale );
+
+ if( options.pan !== false ) {
+
+ // Wait with engaging panning as it may conflict with the
+ // zoom transition
+ panEngageTimeout = setTimeout( function() {
+ panUpdateInterval = setInterval( pan, 1000 / 60 );
+ }, 800 );
+
+ }
+ }
+ }
+ },
+
+ /**
+ * Resets the document zoom state to its default.
+ */
+ out: function() {
+ clearTimeout( panEngageTimeout );
+ clearInterval( panUpdateInterval );
+
+ magnify( { x: 0, y: 0 }, 1 );
+
+ level = 1;
+ },
+
+ // Alias
+ magnify: function( options ) { this.to( options ) },
+ reset: function() { this.out() },
+
+ zoomLevel: function() {
+ return level;
+ }
+ }
+
+})();
diff --git a/_freeze/site_libs/revealjs/plugin/zoom/zoom.esm.js b/_freeze/site_libs/revealjs/plugin/zoom/zoom.esm.js
@@ -0,0 +1,11 @@
+/*!
+ * reveal.js Zoom plugin
+ */
+const e={id:"zoom",init:function(e){e.getRevealElement().addEventListener("mousedown",(function(t){var n=/Linux/.test(window.navigator.platform)?"ctrl":"alt",i=(e.getConfig().zoomKey?e.getConfig().zoomKey:n)+"Key",d=e.getConfig().zoomLevel?e.getConfig().zoomLevel:2;t[i]&&!e.isOverview()&&(t.preventDefault(),o.to({x:t.clientX,y:t.clientY,scale:d,pan:!1}))}))},destroy:()=>{o.reset()}};var t=()=>e,o=function(){var e=1,t=0,n=0,i=-1,d=-1,l="transform"in document.body.style;function s(t,o){var n=r();if(t.width=t.width||1,t.height=t.height||1,t.x-=(window.innerWidth-t.width*o)/2,t.y-=(window.innerHeight-t.height*o)/2,l)if(1===o)document.body.style.transform="";else{var i=n.x+"px "+n.y+"px",d="translate("+-t.x+"px,"+-t.y+"px) scale("+o+")";document.body.style.transformOrigin=i,document.body.style.transform=d}else 1===o?(document.body.style.position="",document.body.style.left="",document.body.style.top="",document.body.style.width="",document.body.style.height="",document.body.style.zoom=""):(document.body.style.position="relative",document.body.style.left=-(n.x+t.x)/o+"px",document.body.style.top=-(n.y+t.y)/o+"px",document.body.style.width=100*o+"%",document.body.style.height=100*o+"%",document.body.style.zoom=o);e=o,document.documentElement.classList&&(1!==e?document.documentElement.classList.add("zoomed"):document.documentElement.classList.remove("zoomed"))}function c(){var o=.12*window.innerWidth,i=.12*window.innerHeight,d=r();n<i?window.scroll(d.x,d.y-14/e*(1-n/i)):n>window.innerHeight-i&&window.scroll(d.x,d.y+(1-(window.innerHeight-n)/i)*(14/e)),t<o?window.scroll(d.x-14/e*(1-t/o),d.y):t>window.innerWidth-o&&window.scroll(d.x+(1-(window.innerWidth-t)/o)*(14/e),d.y)}function r(){return{x:void 0!==window.scrollX?window.scrollX:window.pageXOffset,y:void 0!==window.scrollY?window.scrollY:window.pageYOffset}}return l&&(document.body.style.transition="transform 0.8s ease"),document.addEventListener("keyup",(function(t){1!==e&&27===t.keyCode&&o.out()})),document.addEventListener("mousemove",(function(o){1!==e&&(t=o.clientX,n=o.clientY)})),{to:function(t){if(1!==e)o.out();else{if(t.x=t.x||0,t.y=t.y||0,t.element){var n=t.element.getBoundingClientRect();t.x=n.left-20,t.y=n.top-20,t.width=n.width+40,t.height=n.height+40}void 0!==t.width&&void 0!==t.height&&(t.scale=Math.max(Math.min(window.innerWidth/t.width,window.innerHeight/t.height),1)),t.scale>1&&(t.x*=t.scale,t.y*=t.scale,s(t,t.scale),!1!==t.pan&&(i=setTimeout((function(){d=setInterval(c,1e3/60)}),800)))}},out:function(){clearTimeout(i),clearInterval(d),s({x:0,y:0},1),e=1},magnify:function(e){this.to(e)},reset:function(){this.out()},zoomLevel:function(){return e}}}();
+/*!
+ * zoom.js 0.3 (modified for use with reveal.js)
+ * http://lab.hakim.se/zoom-js
+ * MIT licensed
+ *
+ * Copyright (C) 2011-2014 Hakim El Hattab, http://hakim.se
+ */export{t as default};
diff --git a/_freeze/site_libs/revealjs/plugin/zoom/zoom.js b/_freeze/site_libs/revealjs/plugin/zoom/zoom.js
@@ -0,0 +1,11 @@
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e="undefined"!=typeof globalThis?globalThis:e||self).RevealZoom=t()}(this,(function(){"use strict";
+/*!
+ * reveal.js Zoom plugin
+ */const e={id:"zoom",init:function(e){e.getRevealElement().addEventListener("mousedown",(function(o){var n=/Linux/.test(window.navigator.platform)?"ctrl":"alt",i=(e.getConfig().zoomKey?e.getConfig().zoomKey:n)+"Key",d=e.getConfig().zoomLevel?e.getConfig().zoomLevel:2;o[i]&&!e.isOverview()&&(o.preventDefault(),t.to({x:o.clientX,y:o.clientY,scale:d,pan:!1}))}))},destroy:()=>{t.reset()}};var t=function(){var e=1,o=0,n=0,i=-1,d=-1,l="transform"in document.body.style;function s(t,o){var n=r();if(t.width=t.width||1,t.height=t.height||1,t.x-=(window.innerWidth-t.width*o)/2,t.y-=(window.innerHeight-t.height*o)/2,l)if(1===o)document.body.style.transform="";else{var i=n.x+"px "+n.y+"px",d="translate("+-t.x+"px,"+-t.y+"px) scale("+o+")";document.body.style.transformOrigin=i,document.body.style.transform=d}else 1===o?(document.body.style.position="",document.body.style.left="",document.body.style.top="",document.body.style.width="",document.body.style.height="",document.body.style.zoom=""):(document.body.style.position="relative",document.body.style.left=-(n.x+t.x)/o+"px",document.body.style.top=-(n.y+t.y)/o+"px",document.body.style.width=100*o+"%",document.body.style.height=100*o+"%",document.body.style.zoom=o);e=o,document.documentElement.classList&&(1!==e?document.documentElement.classList.add("zoomed"):document.documentElement.classList.remove("zoomed"))}function c(){var t=.12*window.innerWidth,i=.12*window.innerHeight,d=r();n<i?window.scroll(d.x,d.y-14/e*(1-n/i)):n>window.innerHeight-i&&window.scroll(d.x,d.y+(1-(window.innerHeight-n)/i)*(14/e)),o<t?window.scroll(d.x-14/e*(1-o/t),d.y):o>window.innerWidth-t&&window.scroll(d.x+(1-(window.innerWidth-o)/t)*(14/e),d.y)}function r(){return{x:void 0!==window.scrollX?window.scrollX:window.pageXOffset,y:void 0!==window.scrollY?window.scrollY:window.pageYOffset}}return l&&(document.body.style.transition="transform 0.8s ease"),document.addEventListener("keyup",(function(o){1!==e&&27===o.keyCode&&t.out()})),document.addEventListener("mousemove",(function(t){1!==e&&(o=t.clientX,n=t.clientY)})),{to:function(o){if(1!==e)t.out();else{if(o.x=o.x||0,o.y=o.y||0,o.element){var n=o.element.getBoundingClientRect();o.x=n.left-20,o.y=n.top-20,o.width=n.width+40,o.height=n.height+40}void 0!==o.width&&void 0!==o.height&&(o.scale=Math.max(Math.min(window.innerWidth/o.width,window.innerHeight/o.height),1)),o.scale>1&&(o.x*=o.scale,o.y*=o.scale,s(o,o.scale),!1!==o.pan&&(i=setTimeout((function(){d=setInterval(c,1e3/60)}),800)))}},out:function(){clearTimeout(i),clearInterval(d),s({x:0,y:0},1),e=1},magnify:function(e){this.to(e)},reset:function(){this.out()},zoomLevel:function(){return e}}}();
+/*!
+ * zoom.js 0.3 (modified for use with reveal.js)
+ * http://lab.hakim.se/zoom-js
+ * MIT licensed
+ *
+ * Copyright (C) 2011-2014 Hakim El Hattab, http://hakim.se
+ */return()=>e}));
diff --git a/_freeze/slides/00/execute-results/html.json b/_freeze/slides/00/execute-results/html.json
@@ -0,0 +1,15 @@
+{
+ "hash": "6b4dc131efa5fdc3e6e3b5eeb29cefa8",
+ "result": {
+ "engine": "knitr",
+ "markdown": "---\nengine: knitr\ntitle: Club meetings\n---\n\n# Welcome\n\n- Welcome to the Advanced R book club! \n- book: [adv-r.hadley.nz](https://adv-r.hadley.nz/)\n- These slides are available at [dslc.io/advr](https://dslc.io/advr).\n- We follow the [Data Science Learning Community Code of Conduct](https://dslc.io/code_of_conduct.html).\n\n::: notes\n- You can add notes on each slide with blocks like this!\n- Load a deck in the browser and type \"s\" to see these notes.\n:::\n\n## Book club meetings\n\n- Volunteer leads discussion of a chapter\n - **This is the best way to learn the material.**\n- Presentations: \n - Review of material\n - Questions you have\n - Maybe live demo\n- More info about editing: [this github repo](https://github.com/r4ds/bookclub-advr)\n- Ideally convert existing Rmd to qmd as we go\n- Recorded, available on the [Data Science Learning Community YouTube Channel (DSLC.video)](http://dslc.video)\n\n## Pace\n\n- **Goal:** 1 chapter/week\n- Ok to split overwhelming chapters\n- Ok to combine short chapters\n- Meet ***every*** week except holidays, etc\n - We will meet even if scheduled presenter unavailable\n - Push to finish before Daylight Savings Madness March 8\n\n## Learning objectives (LOs)\n\n- Students who study with LOs in mind ***retain more***\n- **Tips:**\n - Think \"After today's session, you will be able to {LO}\"\n - *Very* roughly **1 per heading**\n\n## Group introductions\n\n- If you feel comfortable sharing:\n - Who are you?\n - Where you calling in from? (If you're not comfortable sharing, skip)\n - How long have you been using R?\n - What was your introduction to R?\n - What are you most looking forward to during the club?\n",
+ "supporting": [],
+ "filters": [
+ "rmarkdown/pagebreak.lua"
+ ],
+ "includes": {},
+ "engineDependencies": {},
+ "preserve": {},
+ "postProcess": true
+ }
+}
+\ No newline at end of file
diff --git a/_freeze/slides/01/execute-results/html.json b/_freeze/slides/01/execute-results/html.json
@@ -0,0 +1,15 @@
+{
+ "hash": "62731caa9e8022bd99086c48ea5611c5",
+ "result": {
+ "engine": "knitr",
+ "markdown": "---\nengine: knitr\ntitle: Introduction\n---\n\n# ️✅ Learning objectives\n\n## LOs for the entire book\n\n- Improve programming skills.\n- Develop a deep understanding of R language fundamentals.\n- Understand what functional programming means.\n- Understand object-oriented programming as applied in R.\n- Understand metaprogramming while developing in R.\n- Be able to identify what to optimize and how to optimize it.\n\n## LOs for this chapter\n\n- Recognize the differences between the 1st and 2nd edition of this book.\n- Describe the overall structure of the book.\n- Decide whether this book is right for you.\n\n# What's new?\n\n## Hadley's goals\n\n- Improve coverage of concepts Hadley understood better after 1e\n- Reduce coverage of unimportant topics\n- Easier to understand (including many more diagrams)\n\n## Base vs rlang\n\n- [1e](http://adv-r.had.co.nz) used base R almost exclusively\n- 2e uses {[rlang](https://rlang.r-lib.org/)}, {[purrr](https://purrr.tidyverse.org/)}, etc\n\n# What we'll learn\n\n## The 5 sections\n\n- **Foundations:** (7 chapters) Building blocks of R\n- **Functional programming:** (3 chapters) Treating functions as objects (that can be args in functions)\n- **Object-oriented programming:** (5 chapters + 1) The many object systems of R (we'll add S7)\n- **Metaprogramming:** (5 chapters) Generating code with code\n- **Techniques:** (4 chapters) Debugging, measuring performance, improving performance\n\n::: notes\n- Might be useful to open TOC here.\n:::\n\n## Why R?\n\n- Diverse & welcoming community\n- Many packages for stats & modeling, ML, dataviz, data wrangling\n- Rmarkdown / Quarto\n- RStudio / Positron\n- Often used in science\n- Functional programming powerful for data\n- Metaprogramming\n- Ease of connection to C, C++, etc\n\n## R imperfections\n\n- Much code by non-coders (messy)\n- Community more about results than programming best practices\n- Metaprogramming can lead to weird failures\n- Inconsistency from > 30 years of evolution\n- Poorly written R code runs very poorly\n\n## Who should read Advanced R?\n\n- Intermediate (and up) R programmers who want to really understand R\n- Programmers from other langs who want to know why R is weird\n- Prereqs:\n - You've written lots of code\n - You understand basics of data analysis\n - You can install CRAN packages\n\n## What this book is not\n\n- [R for Data Science](https://r4ds.hadley.nz/)\n- [R Packages](https://r-pkgs.org/)\n\n## Meta-techniques\n\n- Read source code\n - F2 to see code in RStudio/Positron (with RStudio bindings)\n- Adopt a scientific mindset\n - Don't understand something? Hypothesize & experiment\n\n## Other books\n\n- The Structure and Interpretation of Computer Programs (Abelson, Sussman, and Sussman, 1996) [PDF](https://web.mit.edu/6.001/6.037/sicp.pdf)\n- Concepts, Techniques and Models of Computer Programming (Van Roy & Haridi, 2003) [PDF](https://webperso.info.ucl.ac.be/~pvr/VanRoyHaridi2003-book.pdf)\n- The Pragmatic Programmer (Hunt & Thomas, 1990) [buy eBook](https://pragprog.com/titles/tpp20/the-pragmatic-programmer-20th-anniversary-edition/)\n\n::: notes\n- As far as I can tell, first 2 PDFs are legal.\n- I don't think a legal, free version of The Pragmatic Programmer is available.\n:::\n",
+ "supporting": [],
+ "filters": [
+ "rmarkdown/pagebreak.lua"
+ ],
+ "includes": {},
+ "engineDependencies": {},
+ "preserve": {},
+ "postProcess": true
+ }
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+ "markdown": "---\nengine: knitr\ntitle: Names and values\n---\n\n## Learning objectives\n\n- To be able to understand distinction between an *object* and its *name*\n- With this knowledge, to be able write faster code using less memory\n- To better understand R's functional programming tools\n\nUsing lobstr package here.\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(lobstr)\n```\n:::\n\n\n\n## Quiz\n\n### 1. How do I create a new column called `3` that contains the sum of `1` and `2`?\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf <- data.frame(runif(3), runif(3))\nnames(df) <- c(1, 2)\ndf\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 1 2\n#> 1 0.3404627 0.03332227\n#> 2 0.9892320 0.19464379\n#> 3 0.7218355 0.77230025\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf$`3` <- df$`1` + df$`2`\ndf\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 1 2 3\n#> 1 0.3404627 0.03332227 0.373785\n#> 2 0.9892320 0.19464379 1.183876\n#> 3 0.7218355 0.77230025 1.494136\n```\n\n\n:::\n:::\n\n\n**What makes these names challenging?**\n\n> You need to use backticks (`) when the name of an object doesn't start with a \n> a character or '.' [or . followed by a number] (non-syntactic names).\n\n### 2. How much memory does `y` occupy?\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- runif(1e6)\ny <- list(x, x, x)\n```\n:::\n\n\nNeed to use the lobstr package:\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::obj_size(y)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 8.00 MB\n```\n\n\n:::\n:::\n\n\n> Note that if you look in the RStudio Environment or use R base `object.size()`\n> you actually get a value of 24 MB\n\n\n::: {.cell}\n\n```{.r .cell-code}\nobject.size(y)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 24000224 bytes\n```\n\n\n:::\n:::\n\n\n### 3. On which line does `a` get copied in the following example?\n\n::: {.cell}\n\n```{.r .cell-code}\na <- c(1, 5, 3, 2)\nb <- a\nb[[1]] <- 10\n```\n:::\n\n\n> Not until `b` is modified, the third line\n\n## Binding basics\n\n- Create values and *bind* a name to them\n- Names have values (rather than values have names)\n- Multiple names can refer to the same values\n- We can look at an object's address to keep track of the values independent of their names\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- c(1, 2, 3)\ny <- x\nobj_addr(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"0x188d0060c28\"\n```\n\n\n:::\n\n```{.r .cell-code}\nobj_addr(y)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"0x188d0060c28\"\n```\n\n\n:::\n:::\n\n\n\n### Exercises\n\n##### 1. Explain the relationships\n\n::: {.cell}\n\n```{.r .cell-code}\na <- 1:10\nb <- a\nc <- b\nd <- 1:10\n```\n:::\n\n\n> `a` `b` and `c` are all names that refer to the first value `1:10`\n> \n> `d` is a name that refers to the *second* value of `1:10`.\n\n\n##### 2. Do the following all point to the same underlying function object? hint: `lobstr::obj_addr()`\n\n::: {.cell}\n\n```{.r .cell-code}\nobj_addr(mean)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"0x188cb8b1738\"\n```\n\n\n:::\n\n```{.r .cell-code}\nobj_addr(base::mean)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"0x188cb8b1738\"\n```\n\n\n:::\n\n```{.r .cell-code}\nobj_addr(get(\"mean\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"0x188cb8b1738\"\n```\n\n\n:::\n\n```{.r .cell-code}\nobj_addr(evalq(mean))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"0x188cb8b1738\"\n```\n\n\n:::\n\n```{.r .cell-code}\nobj_addr(match.fun(\"mean\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"0x188cb8b1738\"\n```\n\n\n:::\n:::\n\n\n> Yes!\n\n## Copy-on-modify\n\n- If you modify a value bound to multiple names, it is 'copy-on-modify'\n- If you modify a value bound to a single name, it is 'modify-in-place'\n- Use `tracemem()` to see when a name's value changes\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- c(1, 2, 3)\ncat(tracemem(x), \"\\n\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <00000188D0CBA058>\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ny <- x\ny[[3]] <- 4L # Changes (copy-on-modify)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> tracemem[0x00000188d0cba058 -> 0x00000188d0fa2648]: eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main\n```\n\n\n:::\n\n```{.r .cell-code}\ny[[3]] <- 5L # Doesn't change (modify-in-place)\n```\n:::\n\n\nTurn off `tracemem()` with `untracemem()`\n\n> Can also use `ref(x)` to get the address of the value bound to a given name\n\n\n## Functions\n\n- Copying also applies within functions\n- If you copy (but don't modify) `x` within `f()`, no copy is made\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf <- function(a) {\n a\n}\n\nx <- c(1, 2, 3)\nz <- f(x) # No change in value\n\nref(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1:0x188d1604d78] <dbl>\n```\n\n\n:::\n\n```{.r .cell-code}\nref(z)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1:0x188d1604d78] <dbl>\n```\n\n\n:::\n:::\n\n\n<!--  -->\n\n## Lists\n\n- A list overall, has it's own reference (id)\n- List *elements* also each point to other values\n- List doesn't store the value, it *stores a reference to the value*\n- As of R 3.1.0, modifying lists creates a *shallow copy*\n - References (bindings) are copied, but *values are not*\n\n\n::: {.cell}\n\n```{.r .cell-code}\nl1 <- list(1, 2, 3)\nl2 <- l1\nl2[[3]] <- 4\n```\n:::\n\n\n- We can use `ref()` to see how they compare\n - See how the list reference is different\n - But first two items in each list are the same\n\n\n::: {.cell}\n\n```{.r .cell-code}\nref(l1, l2)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █ [1:0x188d1f72868] <list> \n#> ├─[2:0x188d2624388] <dbl> \n#> ├─[3:0x188d26241c8] <dbl> \n#> └─[4:0x188d2624008] <dbl> \n#> \n#> █ [5:0x188d1f713c8] <list> \n#> ├─[2:0x188d2624388] \n#> ├─[3:0x188d26241c8] \n#> └─[6:0x188d261ac48] <dbl>\n```\n\n\n:::\n:::\n\n\n{width=50%}\n\n## Data Frames\n\n- Data frames are lists of vectors\n- So copying and modifying a column *only affects that column*\n- **BUT** if you modify a *row*, every column must be copied\n\n\n::: {.cell}\n\n```{.r .cell-code}\nd1 <- data.frame(x = c(1, 5, 6), y = c(2, 4, 3))\nd2 <- d1\nd3 <- d1\n```\n:::\n\n\nOnly the modified column changes\n\n::: {.cell}\n\n```{.r .cell-code}\nd2[, 2] <- d2[, 2] * 2\nref(d1, d2)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █ [1:0x188cd88acc8] <df[,2]> \n#> ├─x = [2:0x188cf51e418] <dbl> \n#> └─y = [3:0x188cf51e3c8] <dbl> \n#> \n#> █ [4:0x188cf309dc8] <df[,2]> \n#> ├─x = [2:0x188cf51e418] \n#> └─y = [5:0x188d0111bd8] <dbl>\n```\n\n\n:::\n:::\n\n\nAll columns change\n\n::: {.cell}\n\n```{.r .cell-code}\nd3[1, ] <- d3[1, ] * 3\nref(d1, d3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █ [1:0x188cd88acc8] <df[,2]> \n#> ├─x = [2:0x188cf51e418] <dbl> \n#> └─y = [3:0x188cf51e3c8] <dbl> \n#> \n#> █ [4:0x188cfbb7048] <df[,2]> \n#> ├─x = [5:0x188d0b36148] <dbl> \n#> └─y = [6:0x188d0b360f8] <dbl>\n```\n\n\n:::\n:::\n\n\n## Character vectors\n\n- R has a **global string pool**\n- Elements of character vectors point to unique strings in the pool\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- c(\"a\", \"a\", \"abc\", \"d\")\n```\n:::\n\n\n\n\n## Exercises\n\n##### 1. Why is `tracemem(1:10)` not useful?\n\n> Because it tries to trace a value that is not bound to a name\n\n##### 2. Why are there two copies?\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- c(1L, 2L, 3L)\ntracemem(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"<00000188D06A9888>\"\n```\n\n\n:::\n\n```{.r .cell-code}\nx[[3]] <- 4\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> tracemem[0x00000188d06a9888 -> 0x00000188d0711508]: eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main \n#> tracemem[0x00000188d0711508 -> 0x00000188d16add18]: eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main\n```\n\n\n:::\n:::\n\n\n> Because we convert an *integer* vector (using 1L, etc.) to a *double* vector (using just 4)- \n\n##### 3. What is the relationships among these objects?\n\n\n::: {.cell}\n\n```{.r .cell-code}\na <- 1:10 \nb <- list(a, a)\nc <- list(b, a, 1:10) # \n```\n:::\n\n\na <- obj 1 \nb <- obj 1, obj 1 \nc <- b(obj 1, obj 1), obj 1, 1:10 \n\n\n::: {.cell}\n\n```{.r .cell-code}\nref(c)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █ [1:0x188d2022558] <list> \n#> ├─█ [2:0x188d0b05b48] <list> \n#> │ ├─[3:0x188d0b5b858] <int> \n#> │ └─[3:0x188d0b5b858] \n#> ├─[3:0x188d0b5b858] \n#> └─[4:0x188d0c0e4a0] <int>\n```\n\n\n:::\n:::\n\n\n\n##### 4. What happens here?\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- list(1:10)\nx[[2]] <- x\n```\n:::\n\n\n- `x` is a list\n- `x[[2]] <- x` creates a new list, which in turn contains a reference to the \n original list\n- `x` is no longer bound to `list(1:10)`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nref(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █ [1:0x188d1229388] <list> \n#> ├─[2:0x188d150cd98] <int> \n#> └─█ [3:0x188d1c717e8] <list> \n#> └─[2:0x188d150cd98]\n```\n\n\n:::\n:::\n\n\n{width=50%}\n\n## Object Size\n\n- Use `lobstr::obj_size()` \n- Lists may be smaller than expected because of referencing the same value\n- Strings may be smaller than expected because using global string pool\n- Difficult to predict how big something will be\n - Can only add sizes together if they share no references in common\n\n### Alternative Representation\n- As of R 3.5.0 - ALTREP\n- Represent some vectors compactly\n - e.g., 1:1000 - not 10,000 values, just 1 and 1,000\n\n### Exercises\n\n##### 1. Why are the sizes so different?\n\n\n::: {.cell}\n\n```{.r .cell-code}\ny <- rep(list(runif(1e4)), 100)\n\nobject.size(y) # ~8000 kB\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 8005648 bytes\n```\n\n\n:::\n\n```{.r .cell-code}\nobj_size(y) # ~80 kB\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 80.90 kB\n```\n\n\n:::\n:::\n\n\n> From `?object.size()`: \n> \n> \"This function merely provides a rough indication: it should be reasonably accurate for atomic vectors, but **does not detect if elements of a list are shared**, for example.\n\n##### 2. Why is the size misleading?\n\n\n::: {.cell}\n\n```{.r .cell-code}\nfuns <- list(mean, sd, var)\nobj_size(funs)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 18.76 kB\n```\n\n\n:::\n:::\n\n\n> Because they reference functions from base and stats, which are always available.\n> Why bother looking at the size? What use is that?\n\n##### 3. Predict the sizes\n\n\n::: {.cell}\n\n```{.r .cell-code}\na <- runif(1e6) # 8 MB\nobj_size(a)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 8.00 MB\n```\n\n\n:::\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nb <- list(a, a)\n```\n:::\n\n\n- There is one value ~8MB\n- `a` and `b[[1]]` and `b[[2]]` all point to the same value.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nobj_size(b)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 8.00 MB\n```\n\n\n:::\n\n```{.r .cell-code}\nobj_size(a, b)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 8.00 MB\n```\n\n\n:::\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nb[[1]][[1]] <- 10\n```\n:::\n\n- Now there are two values ~8MB each (16MB total)\n- `a` and `b[[2]]` point to the same value (8MB)\n- `b[[1]]` is new (8MB) because the first element (`b[[1]][[1]]`) has been changed\n\n\n::: {.cell}\n\n```{.r .cell-code}\nobj_size(b) # 16 MB (two values, two element references)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 16.00 MB\n```\n\n\n:::\n\n```{.r .cell-code}\nobj_size(a, b) # 16 MB (a & b[[2]] point to the same value)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 16.00 MB\n```\n\n\n:::\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nb[[2]][[1]] <- 10\n```\n:::\n\n- Finally, now there are three values ~8MB each (24MB total)\n- Although `b[[1]]` and `b[[2]]` have the same contents, \n they are not references to the same object.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nobj_size(b)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 16.00 MB\n```\n\n\n:::\n\n```{.r .cell-code}\nobj_size(a, b)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 24.00 MB\n```\n\n\n:::\n:::\n\n\n\n## Modify-in-place\n\n- Modifying usually creates a copy except for\n - Objects with a single binding (performance optimization)\n - Environments (special)\n\n### Objects with a single binding\n\n- Hard to know if copy will occur\n- If you have 2+ bindings and remove them, R can't follow how many are removed (so will always think there are more than one)\n- May make a copy even if there's only one binding left\n- Using a function makes a reference to it **unless it's a function based on C**\n- Best to use `tracemem()` to check rather than guess.\n\n\n#### Example - lists vs. data frames in for loop\n\n**Setup** \n\nCreate the data to modify\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- data.frame(matrix(runif(5 * 1e4), ncol = 5))\nmedians <- vapply(x, median, numeric(1))\n```\n:::\n\n\n\n**Data frame - Copied every time!**\n\n::: {.cell}\n\n```{.r .cell-code}\ncat(tracemem(x), \"\\n\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <00000188D27817A8>\n```\n\n\n:::\n\n```{.r .cell-code}\nfor (i in seq_along(medians)) {\n x[[i]] <- x[[i]] - medians[[i]]\n}\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> tracemem[0x00000188d27817a8 -> 0x00000188d283d118]: eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main \n#> tracemem[0x00000188d283d118 -> 0x00000188d283c548]: [[<-.data.frame [[<- eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main \n#> tracemem[0x00000188d283c548 -> 0x00000188d283c4d8]: eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main \n#> tracemem[0x00000188d283c4d8 -> 0x00000188d283c468]: [[<-.data.frame [[<- eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main \n#> tracemem[0x00000188d283c468 -> 0x00000188d283c3f8]: eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main \n#> tracemem[0x00000188d283c3f8 -> 0x00000188d283c388]: [[<-.data.frame [[<- eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main \n#> tracemem[0x00000188d283c388 -> 0x00000188d283c318]: eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main \n#> tracemem[0x00000188d283c318 -> 0x00000188d283c2a8]: [[<-.data.frame [[<- eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main \n#> tracemem[0x00000188d283c2a8 -> 0x00000188d283c238]: eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main \n#> tracemem[0x00000188d283c238 -> 0x00000188d283c1c8]: [[<-.data.frame [[<- eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main\n```\n\n\n:::\n\n```{.r .cell-code}\nuntracemem(x)\n```\n:::\n\n\n**List (uses internal C code) - Copied once!**\n\n::: {.cell}\n\n```{.r .cell-code}\ny <- as.list(x)\n\ncat(tracemem(y), \"\\n\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <00000188CD850188>\n```\n\n\n:::\n\n```{.r .cell-code}\nfor (i in seq_along(medians)) {\n y[[i]] <- y[[i]] - medians[[i]]\n}\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> tracemem[0x00000188cd850188 -> 0x00000188cde947e8]: eval eval withVisible withCallingHandlers eval eval with_handlers doWithOneRestart withOneRestart withRestartList doWithOneRestart withOneRestart withRestartList withRestarts <Anonymous> evaluate in_dir in_input_dir eng_r block_exec call_block process_group withCallingHandlers <Anonymous> process_file <Anonymous> <Anonymous> execute .main\n```\n\n\n:::\n\n```{.r .cell-code}\nuntracemem(y)\n```\n:::\n\n\n#### Benchmark this (Exercise #2)\n\n**First wrap in a function**\n\n::: {.cell}\n\n```{.r .cell-code}\nmed <- function(d, medians) {\n for (i in seq_along(medians)) {\n d[[i]] <- d[[i]] - medians[[i]]\n }\n}\n```\n:::\n\n\n**Try with 5 columns**\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- data.frame(matrix(runif(5 * 1e4), ncol = 5))\nmedians <- vapply(x, median, numeric(1))\ny <- as.list(x)\n\nbench::mark(\n \"data.frame\" = med(x, medians),\n \"list\" = med(y, medians)\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 6\n#> expression min median `itr/sec` mem_alloc `gc/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl> <bch:byt> <dbl>\n#> 1 data.frame 54.3µs 69.9µs 12785. 410KB 192.\n#> 2 list 21.9µs 32.2µs 29164. 391KB 283.\n```\n\n\n:::\n:::\n\n\n**Try with 20 columns**\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- data.frame(matrix(runif(5 * 1e4), ncol = 20))\nmedians <- vapply(x, median, numeric(1))\ny <- as.list(x)\n\nbench::mark(\n \"data.frame\" = med(x, medians),\n \"list\" = med(y, medians)\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 6\n#> expression min median `itr/sec` mem_alloc `gc/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl> <bch:byt> <dbl>\n#> 1 data.frame 135.6µs 174.7µs 5314. 400KB 57.3\n#> 2 list 28.4µs 38.6µs 24248. 392KB 243.\n```\n\n\n:::\n:::\n\n\n**WOW!**\n\n\n### Environmments\n- Always modified in place (**reference semantics**)\n- Interesting because if you modify the environment, all existing bindings have the same reference\n- If two names point to the same environment, and you update one, you update both!\n\n\n::: {.cell}\n\n```{.r .cell-code}\ne1 <- rlang::env(a = 1, b = 2, c = 3)\ne2 <- e1\ne1$c <- 4\ne2$c\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 4\n```\n\n\n:::\n:::\n\n\n- This means that environments can contain themselves (!)\n\n### Exercises\n\n##### 1. Why isn't this circular?\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- list()\nx[[1]] <- x\n```\n:::\n\n\n> Because the binding to the list() object moves from `x` in the first line to `x[[1]]` in the second.\n\n##### 2. (see \"Objects with a single binding\")\n\n##### 3. What happens if you attempt to use tracemem() on an environment?\n\n\n::: {.cell}\n\n```{.r .cell-code}\ne1 <- rlang::env(a = 1, b = 2, c = 3)\ntracemem(e1)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in tracemem(e1): 'tracemem' is not useful for promise and environment objects\n```\n\n\n:::\n:::\n\n\n> Because environments always modified in place, there's no point in tracing them\n\n\n## Unbinding and the garbage collector\n\n- If you delete the 'name' bound to an object, the object still exists\n- R runs a \"garbage collector\" (GC) to remove these objects when it needs more memory\n- \"Looking from the outside, it’s basically impossible to predict when the GC will run. In fact, you shouldn’t even try.\"\n- If you want to know when it runs, use `gcinfo(TRUE)` to get a message printed\n- You can force GC with `gc()` but you never need to to use more memory *within* R\n- Only reason to do so is to free memory for other system software, or, to get the\nmessage printed about how much memory is being used\n\n\n::: {.cell}\n\n```{.r .cell-code}\ngc()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> used (Mb) gc trigger (Mb) max used (Mb)\n#> Ncells 806847 43.1 1485610 79.4 1485610 79.4\n#> Vcells 4533816 34.6 10146329 77.5 10146311 77.5\n```\n\n\n:::\n\n```{.r .cell-code}\nmem_used()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 81.46 MB\n```\n\n\n:::\n:::\n\n\n- These numbers will **not** be what you OS tells you because, \n 1. It includes objects created by R, but not R interpreter\n 2. R and OS are lazy and don't reclaim/release memory until it's needed\n 3. R counts memory from objects, but there are gaps due to those that are deleted -> \n *memory fragmentation* [less memory actually available they you might think]\n\n\n## Meeting Videos\n\n### Cohort 1\n\n(no video recorded)\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/pCiNj2JRK50\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/-bEXdOoxO_E\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/gcVU_F-L6zY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/aqcvKox9V0Q\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/O4Oo_qO7SIY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:16:57\tFederica Gazzelloni:\tcohort 2 video: https://www.youtube.com/watch?v=pCiNj2JRK50\n00:18:39\tFederica Gazzelloni:\tcohort 2 presentation: https://r4ds.github.io/bookclub-Advanced_R/Presentations/Week02/Cohort2_America/Chapter2Slides.html#1\n00:40:24\tArthur Shaw:\tJust the opposite, Ryan. Very clear presentation!\n00:51:54\tTrevin:\tparquet?\n00:53:00\tArthur Shaw:\tWe may all be right. {arrow} looks to deal with feather and parquet files: https://arrow.apache.org/docs/r/\n01:00:04\tArthur Shaw:\tSome questions for future meetings. (1) I find Ryan's use of slides hugely effective in conveying information. Would it be OK if future sessions (optionally) used slides? If so, should/could we commit slides to some folder on the repo? (2) I think reusing the images from Hadley's books really helps understanding and discussion. Is that OK to do? Here I'm thinking about copyright concerns. (If possible, I would rather not redraw variants of Hadley's images.)\n01:01:35\tFederica Gazzelloni:\tIt's all ok, you can use past presentation, you don't need to push them to the repo, you can use the images from the book\n01:07:19\tFederica Gazzelloni:\tCan I use: gc(reset = TRUE) safely?\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/kpAUoGO6elE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:09:40\tRyan Honomichl:\thttps://drdoane.com/three-deep-truths-about-r/\n00:12:51\tRobert Hilly:\tBe right back\n00:36:12\tRyan Honomichl:\tbrb\n00:41:18\tRon:\tI tried mapply and also got different answers\n00:41:44\tcollinberke:\tInteresting, would like to know more what is going on.\n00:49:57\tRobert Hilly:\tsimple_map <- function(x, f, ...) {\n out <- vector(\"list\", length(x))\n for (i in seq_along(x)) {\n out[[i]] <- f(x[[i]], ...)\n }\n out\n}\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Vectors\n---\n\n## Learning objectives:\n\n- Learn about different types of vectors and their attributes\n- Navigate through vector types and their value types\n- Venture into factors and date-time objects\n- Discuss the differences between data frames and tibbles\n- Do not get absorbed by the `NA` and `NULL` black hole\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(\"dplyr\")\nlibrary(\"gt\")\nlibrary(\"palmerpenguins\")\n```\n:::\n\n\n\n<details>\n<summary>Session Info</summary>\n\n::: {.cell}\n\n```{.r .cell-code}\nutils::sessionInfo()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> R version 4.5.1 (2025-06-13 ucrt)\n#> Platform: x86_64-w64-mingw32/x64\n#> Running under: Windows 11 x64 (build 26100)\n#> \n#> Matrix products: default\n#> LAPACK version 3.12.1\n#> \n#> locale:\n#> [1] LC_COLLATE=English_United States.utf8 \n#> [2] LC_CTYPE=English_United States.utf8 \n#> [3] LC_MONETARY=English_United States.utf8\n#> [4] LC_NUMERIC=C \n#> [5] LC_TIME=English_United States.utf8 \n#> \n#> time zone: America/Chicago\n#> tzcode source: internal\n#> \n#> attached base packages:\n#> [1] stats graphics grDevices utils datasets methods base \n#> \n#> other attached packages:\n#> [1] palmerpenguins_0.1.1 gt_1.0.0 dplyr_1.1.4 \n#> \n#> loaded via a namespace (and not attached):\n#> [1] digest_0.6.37 R6_2.6.1 fastmap_1.2.0 tidyselect_1.2.1 \n#> [5] xfun_0.52 magrittr_2.0.3 glue_1.8.0 tibble_3.3.0 \n#> [9] knitr_1.50 pkgconfig_2.0.3 htmltools_0.5.8.1 generics_0.1.4 \n#> [13] rmarkdown_2.29 lifecycle_1.0.4 xml2_1.3.8 cli_3.6.5 \n#> [17] vctrs_0.6.5 compiler_4.5.1 tools_4.5.1 pillar_1.11.0 \n#> [21] evaluate_1.0.4 yaml_2.3.10 rlang_1.1.6 jsonlite_2.0.0 \n#> [25] htmlwidgets_1.6.4 keyring_1.4.1\n```\n\n\n:::\n:::\n\n</details>\n\n## Aperitif\n\n\n\n### Counting Penguins\n\nConsider this code to count the number of Gentoo penguins in the `penguins` data set. We see that there are 124 Gentoo penguins.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsum(\"Gentoo\" == penguins$species)\n# output: 124\n```\n:::\n\n\n### In\n\nOne subtle error can arise in trying out `%in%` here instead.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nspecies_vector <- penguins |> select(species)\nprint(\"Gentoo\" %in% species_vector)\n# output: FALSE\n```\n:::\n\n\n\n\n### Fix: base R \n\n\n::: {.cell}\n\n```{.r .cell-code}\nspecies_unlist <- penguins |> select(species) |> unlist()\nprint(\"Gentoo\" %in% species_unlist)\n# output: TRUE\n```\n:::\n\n\n### Fix: dplyr\n\n\n::: {.cell}\n\n```{.r .cell-code}\nspecies_pull <- penguins |> select(species) |> pull()\nprint(\"Gentoo\" %in% species_pull)\n# output: TRUE\n```\n:::\n\n\n### Motivation\n\n* What are the different types of vectors?\n* How does this affect accessing vectors?\n\n<details>\n<summary>Side Quest: Looking up the `%in%` operator</summary>\nIf you want to look up the manual pages for the `%in%` operator with the `?`, use backticks:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n?`%in%`\n```\n:::\n\n\nand we find that `%in%` is a wrapper for the `match()` function.\n\n</details>\n\n\n## Types of Vectors\n\n \n\nTwo main types:\n\n- **Atomic**: Elements all the same type.\n- **List**: Elements are different Types.\n\nClosely related but not technically a vector:\n\n- **NULL**: Null elements. Often length zero.\n\n## Atomic Vectors\n\n### Types of atomic vectors\n\n \n\n- **Logical**: True/False\n- **Integer**: Numeric (discrete, no decimals)\n- **Double**: Numeric (continuous, decimals)\n- **Character**: String\n\n### Vectors of Length One\n\n**Scalars** are vectors that consist of a single value.\n\n#### Logicals\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlgl1 <- TRUE\nlgl2 <- T #abbreviation for TRUE\nlgl3 <- FALSE\nlgl4 <- F #abbreviation for FALSE\n```\n:::\n\n\n#### Doubles\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# integer, decimal, scientific, or hexidecimal format\ndbl1 <- 1\ndbl2 <- 1.234 # decimal\ndbl3 <- 1.234e0 # scientific format\ndbl4 <- 0xcafe # hexidecimal format\n```\n:::\n\n\n#### Integers\n\nIntegers must be followed by L and cannot have fractional values\n\n\n::: {.cell}\n\n```{.r .cell-code}\nint1 <- 1L\nint2 <- 1234L\nint3 <- 1234e0L\nint4 <- 0xcafeL\n```\n:::\n\n\n<details>\n<summary>Pop Quiz: Why \"L\" for integers?</summary>\nWickham notes that the use of `L` dates back to the **C** programming language and its \"long int\" type for memory allocation.\n</details>\n\n#### Strings\n\nStrings can use single or double quotes and special characters are escaped with \\\n\n\n::: {.cell}\n\n```{.r .cell-code}\nstr1 <- \"hello\" # double quotes\nstr2 <- 'hello' # single quotes\nstr3 <- \"مرحبًا\" # Unicode\nstr4 <- \"\\U0001f605\" # sweaty_smile\n```\n:::\n\n\n### Longer\n\nThere are several ways to make longer vectors:\n\n**1. With single values** inside c() for combine.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlgl_var <- c(TRUE, FALSE)\nint_var <- c(1L, 6L, 10L)\ndbl_var <- c(1, 2.5, 4.5)\nchr_var <- c(\"these are\", \"some strings\")\n```\n:::\n\n\n \n\n**2. With other vectors**\n\n\n::: {.cell}\n\n```{.r .cell-code}\nc(c(1, 2), c(3, 4)) # output is not nested\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 2 3 4\n```\n\n\n:::\n:::\n\n\n<details>\n<summary>Side Quest: rlang</summary>\n\n`{rlang}` has [vector constructor functions too](https://rlang.r-lib.org/reference/vector-construction.html):\n\n- `rlang::lgl(...)`\n- `rlang::int(...)`\n- `rlang::dbl(...)`\n- `rlang::chr(...)`\n\nThey look to do both more and less than `c()`.\n\n- More:\n - Enforce type\n - Splice lists\n - More types: `rlang::bytes()`, `rlang::cpl(...)`\n- Less:\n - Stricter rules on names\n\nNote: currently has `questioning` lifecycle badge, since these constructors may get moved to `vctrs`\n\n</details>\n\n### Type and Length\n\nWe can determine the type of a vector with `typeof()` and its length with `length()`\n\n\n::: {.cell}\n::: {.cell-output-display}\n\n```{=html}\n<div id=\"ggazdkgmch\" style=\"padding-left:0px;padding-right:0px;padding-top:10px;padding-bottom:10px;overflow-x:auto;overflow-y:auto;width:auto;height:auto;\">\n<style>#ggazdkgmch table {\n font-family: system-ui, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';\n -webkit-font-smoothing: antialiased;\n -moz-osx-font-smoothing: grayscale;\n}\n\n#ggazdkgmch thead, #ggazdkgmch tbody, #ggazdkgmch tfoot, #ggazdkgmch tr, #ggazdkgmch td, #ggazdkgmch th {\n border-style: none;\n}\n\n#ggazdkgmch p {\n margin: 0;\n padding: 0;\n}\n\n#ggazdkgmch .gt_table {\n display: table;\n border-collapse: collapse;\n line-height: normal;\n margin-left: auto;\n margin-right: auto;\n color: #333333;\n font-size: 16px;\n font-weight: normal;\n font-style: normal;\n background-color: #FFFFFF;\n width: auto;\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #A8A8A8;\n border-right-style: none;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #A8A8A8;\n border-left-style: none;\n border-left-width: 2px;\n border-left-color: #D3D3D3;\n}\n\n#ggazdkgmch .gt_caption {\n padding-top: 4px;\n padding-bottom: 4px;\n}\n\n#ggazdkgmch .gt_title {\n color: #333333;\n font-size: 125%;\n font-weight: initial;\n padding-top: 4px;\n padding-bottom: 4px;\n padding-left: 5px;\n padding-right: 5px;\n border-bottom-color: #FFFFFF;\n border-bottom-width: 0;\n}\n\n#ggazdkgmch .gt_subtitle {\n color: #333333;\n font-size: 85%;\n font-weight: initial;\n padding-top: 3px;\n padding-bottom: 5px;\n padding-left: 5px;\n padding-right: 5px;\n border-top-color: #FFFFFF;\n border-top-width: 0;\n}\n\n#ggazdkgmch .gt_heading {\n background-color: #FFFFFF;\n text-align: center;\n border-bottom-color: #FFFFFF;\n border-left-style: none;\n border-left-width: 1px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 1px;\n border-right-color: #D3D3D3;\n}\n\n#ggazdkgmch .gt_bottom_border {\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n}\n\n#ggazdkgmch .gt_col_headings {\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 1px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 1px;\n border-right-color: #D3D3D3;\n}\n\n#ggazdkgmch .gt_col_heading {\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: normal;\n text-transform: inherit;\n border-left-style: none;\n border-left-width: 1px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 1px;\n border-right-color: #D3D3D3;\n vertical-align: bottom;\n padding-top: 5px;\n padding-bottom: 6px;\n padding-left: 5px;\n padding-right: 5px;\n overflow-x: hidden;\n}\n\n#ggazdkgmch .gt_column_spanner_outer {\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: normal;\n text-transform: inherit;\n padding-top: 0;\n padding-bottom: 0;\n padding-left: 4px;\n padding-right: 4px;\n}\n\n#ggazdkgmch .gt_column_spanner_outer:first-child {\n padding-left: 0;\n}\n\n#ggazdkgmch .gt_column_spanner_outer:last-child {\n padding-right: 0;\n}\n\n#ggazdkgmch .gt_column_spanner {\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n vertical-align: bottom;\n padding-top: 5px;\n padding-bottom: 5px;\n overflow-x: hidden;\n display: inline-block;\n width: 100%;\n}\n\n#ggazdkgmch .gt_spanner_row {\n border-bottom-style: hidden;\n}\n\n#ggazdkgmch .gt_group_heading {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: initial;\n text-transform: inherit;\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 1px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 1px;\n border-right-color: #D3D3D3;\n vertical-align: middle;\n text-align: left;\n}\n\n#ggazdkgmch .gt_empty_group_heading {\n padding: 0.5px;\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: initial;\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n vertical-align: middle;\n}\n\n#ggazdkgmch .gt_from_md > :first-child {\n margin-top: 0;\n}\n\n#ggazdkgmch .gt_from_md > :last-child {\n margin-bottom: 0;\n}\n\n#ggazdkgmch .gt_row {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n margin: 10px;\n border-top-style: solid;\n border-top-width: 1px;\n border-top-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 1px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 1px;\n border-right-color: #D3D3D3;\n vertical-align: middle;\n overflow-x: hidden;\n}\n\n#ggazdkgmch .gt_stub {\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: initial;\n text-transform: inherit;\n border-right-style: solid;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#ggazdkgmch .gt_stub_row_group {\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: initial;\n text-transform: inherit;\n border-right-style: solid;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n padding-left: 5px;\n padding-right: 5px;\n vertical-align: top;\n}\n\n#ggazdkgmch .gt_row_group_first td {\n border-top-width: 2px;\n}\n\n#ggazdkgmch .gt_row_group_first th {\n border-top-width: 2px;\n}\n\n#ggazdkgmch .gt_summary_row {\n color: #333333;\n background-color: #FFFFFF;\n text-transform: inherit;\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#ggazdkgmch .gt_first_summary_row {\n border-top-style: solid;\n border-top-color: #D3D3D3;\n}\n\n#ggazdkgmch .gt_first_summary_row.thick {\n border-top-width: 2px;\n}\n\n#ggazdkgmch .gt_last_summary_row {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n}\n\n#ggazdkgmch .gt_grand_summary_row {\n color: #333333;\n background-color: #FFFFFF;\n text-transform: inherit;\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#ggazdkgmch .gt_first_grand_summary_row {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n border-top-style: double;\n border-top-width: 6px;\n border-top-color: #D3D3D3;\n}\n\n#ggazdkgmch .gt_last_grand_summary_row_top {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n border-bottom-style: double;\n border-bottom-width: 6px;\n border-bottom-color: #D3D3D3;\n}\n\n#ggazdkgmch .gt_striped {\n background-color: rgba(128, 128, 128, 0.05);\n}\n\n#ggazdkgmch .gt_table_body {\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n}\n\n#ggazdkgmch .gt_footnotes {\n color: #333333;\n background-color: #FFFFFF;\n border-bottom-style: none;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 2px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n}\n\n#ggazdkgmch .gt_footnote {\n margin: 0px;\n font-size: 90%;\n padding-top: 4px;\n padding-bottom: 4px;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#ggazdkgmch .gt_sourcenotes {\n color: #333333;\n background-color: #FFFFFF;\n border-bottom-style: none;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 2px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n}\n\n#ggazdkgmch .gt_sourcenote {\n font-size: 90%;\n padding-top: 4px;\n padding-bottom: 4px;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#ggazdkgmch .gt_left {\n text-align: left;\n}\n\n#ggazdkgmch .gt_center {\n text-align: center;\n}\n\n#ggazdkgmch .gt_right {\n text-align: right;\n font-variant-numeric: tabular-nums;\n}\n\n#ggazdkgmch .gt_font_normal {\n font-weight: normal;\n}\n\n#ggazdkgmch .gt_font_bold {\n font-weight: bold;\n}\n\n#ggazdkgmch .gt_font_italic {\n font-style: italic;\n}\n\n#ggazdkgmch .gt_super {\n font-size: 65%;\n}\n\n#ggazdkgmch .gt_footnote_marks {\n font-size: 75%;\n vertical-align: 0.4em;\n position: initial;\n}\n\n#ggazdkgmch .gt_asterisk {\n font-size: 100%;\n vertical-align: 0;\n}\n\n#ggazdkgmch .gt_indent_1 {\n text-indent: 5px;\n}\n\n#ggazdkgmch .gt_indent_2 {\n text-indent: 10px;\n}\n\n#ggazdkgmch .gt_indent_3 {\n text-indent: 15px;\n}\n\n#ggazdkgmch .gt_indent_4 {\n text-indent: 20px;\n}\n\n#ggazdkgmch .gt_indent_5 {\n text-indent: 25px;\n}\n\n#ggazdkgmch .katex-display {\n display: inline-flex !important;\n margin-bottom: 0.75em !important;\n}\n\n#ggazdkgmch div.Reactable > div.rt-table > div.rt-thead > div.rt-tr.rt-tr-group-header > div.rt-th-group:after {\n height: 0px !important;\n}\n</style>\n<table class=\"gt_table\" data-quarto-disable-processing=\"false\" data-quarto-bootstrap=\"false\">\n <thead>\n <tr class=\"gt_heading\">\n <td colspan=\"4\" class=\"gt_heading gt_title gt_font_normal gt_bottom_border\" style>Types of Atomic Vectors<span class=\"gt_footnote_marks\" style=\"white-space:nowrap;font-style:italic;font-weight:normal;line-height:0;\"><sup>1</sup></span></td>\n </tr>\n \n <tr class=\"gt_col_headings\">\n <th class=\"gt_col_heading gt_columns_bottom_border gt_center\" rowspan=\"1\" colspan=\"1\" scope=\"col\" id=\"var_names\">name</th>\n <th class=\"gt_col_heading gt_columns_bottom_border gt_center\" rowspan=\"1\" colspan=\"1\" scope=\"col\" id=\"var_values\">value</th>\n <th class=\"gt_col_heading gt_columns_bottom_border gt_center\" rowspan=\"1\" colspan=\"1\" scope=\"col\" id=\"var_type\">typeof()</th>\n <th class=\"gt_col_heading gt_columns_bottom_border gt_center\" rowspan=\"1\" colspan=\"1\" scope=\"col\" id=\"var_length\">length()</th>\n </tr>\n </thead>\n <tbody class=\"gt_table_body\">\n <tr><td headers=\"var_names\" class=\"gt_row gt_center\">lgl_var</td>\n<td headers=\"var_values\" class=\"gt_row gt_center\">TRUE, FALSE</td>\n<td headers=\"var_type\" class=\"gt_row gt_center\" style=\"background-color: #F9E3D6;\">logical</td>\n<td headers=\"var_length\" class=\"gt_row gt_center\" style=\"background-color: #E0FFFF;\">2</td></tr>\n <tr><td headers=\"var_names\" class=\"gt_row gt_center\">int_var</td>\n<td headers=\"var_values\" class=\"gt_row gt_center\">1L, 6L, 10L</td>\n<td headers=\"var_type\" class=\"gt_row gt_center\" style=\"background-color: #F9E3D6;\">integer</td>\n<td headers=\"var_length\" class=\"gt_row gt_center\" style=\"background-color: #E0FFFF;\">3</td></tr>\n <tr><td headers=\"var_names\" class=\"gt_row gt_center\">dbl_var</td>\n<td headers=\"var_values\" class=\"gt_row gt_center\">1, 2.5, 4.5</td>\n<td headers=\"var_type\" class=\"gt_row gt_center\" style=\"background-color: #F9E3D6;\">double</td>\n<td headers=\"var_length\" class=\"gt_row gt_center\" style=\"background-color: #E0FFFF;\">3</td></tr>\n <tr><td headers=\"var_names\" class=\"gt_row gt_center\">chr_var</td>\n<td headers=\"var_values\" class=\"gt_row gt_center\">'these are', 'some strings'</td>\n<td headers=\"var_type\" class=\"gt_row gt_center\" style=\"background-color: #F9E3D6;\">character</td>\n<td headers=\"var_length\" class=\"gt_row gt_center\" style=\"background-color: #E0FFFF;\">2</td></tr>\n </tbody>\n \n <tfoot class=\"gt_footnotes\">\n <tr>\n <td class=\"gt_footnote\" colspan=\"4\"><span class=\"gt_footnote_marks\" style=\"white-space:nowrap;font-style:italic;font-weight:normal;line-height:0;\"><sup>1</sup></span> Source: https://adv-r.hadley.nz/index.html</td>\n </tr>\n </tfoot>\n</table>\n</div>\n```\n\n:::\n:::\n\n\n<details>\n<summary>Side Quest: Penguins</summary>\n\n::: {.cell}\n\n```{.r .cell-code}\ntypeof(penguins$species)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"integer\"\n```\n\n\n:::\n\n```{.r .cell-code}\nclass(penguins$species)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"factor\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(species_unlist)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"integer\"\n```\n\n\n:::\n\n```{.r .cell-code}\nclass(species_unlist)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"factor\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(species_pull)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"integer\"\n```\n\n\n:::\n\n```{.r .cell-code}\nclass(species_pull)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"factor\"\n```\n\n\n:::\n:::\n\n\n</details>\n\n### Missing values\n\n#### Contagion\n\nFor most computations, an operation over values that includes a missing value yields a missing value (unless you're careful)\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# contagion\n5*NA\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] NA\n```\n\n\n:::\n\n```{.r .cell-code}\nsum(c(1, 2, NA, 3))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] NA\n```\n\n\n:::\n:::\n\n\n#### Exceptions\n\n\n::: {.cell}\n\n```{.r .cell-code}\nNA ^ 0\n#> [1] 1\nNA | TRUE\n#> [1] TRUE\nNA & FALSE\n#> [1] FALSE\n```\n:::\n\n\n\n#### Innoculation\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsum(c(1, 2, NA, 3), na.rm = TRUE)\n# output: 6\n```\n:::\n\n\nTo search for missing values use `is.na()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- c(NA, 5, NA, 10)\nx == NA\n# output: NA NA NA NA [BATMAN!]\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nis.na(x)\n# output: TRUE FALSE TRUE FALSE\n```\n:::\n\n\n<details>\n<summary>Side Quest: NA Types</summary>\n\nEach type has its own NA type\n\n- Logical: `NA`\n- Integer: `NA_integer`\n- Double: `NA_double`\n- Character: `NA_character`\n\nThis may not matter in many contexts.\n\nBut this does matter for operations where types matter like `dplyr::if_else()`.\n</details>\n\n\n### Testing\n\n**What type of vector `is.*`() it?**\n\nTest data type:\n\n- Logical: `is.logical()`\n- Integer: `is.integer()`\n- Double: `is.double()`\n- Character: `is.character()`\n\n**What type of object is it?**\n\nDon't test objects with these tools:\n\n- `is.vector()`\n- `is.atomic()`\n- `is.numeric()` \n\nThey don’t test if you have a vector, atomic vector, or numeric vector; you’ll need to carefully read the documentation to figure out what they actually do (preview: *attributes*)\n\n<details>\n<summary>Side Quest: rlang</summary>\n\nInstead, maybe, use `{rlang}`\n\n- `rlang::is_vector`\n- `rlang::is_atomic`\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# vector\nrlang::is_vector(c(1, 2))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\nrlang::is_vector(list(1, 2))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\n# atomic\nrlang::is_atomic(c(1, 2))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\nrlang::is_atomic(list(1, \"a\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] FALSE\n```\n\n\n:::\n:::\n\n\nSee more [here](https://rlang.r-lib.org/reference/type-predicates.html)\n</details>\n\n\n### Coercion\n\n* R follows rules for coercion: character → double → integer → logical\n\n* R can coerce either automatically or explicitly\n\n#### **Automatic**\n\nTwo contexts for automatic coercion:\n\n1. Combination\n2. Mathematical\n\n##### Coercion by Combination:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nstr(c(TRUE, \"TRUE\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> chr [1:2] \"TRUE\" \"TRUE\"\n```\n\n\n:::\n:::\n\n\n##### Coercion by Mathematical operations:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# imagine a logical vector about whether an attribute is present\nhas_attribute <- c(TRUE, FALSE, TRUE, TRUE)\n\n# number with attribute\nsum(has_attribute)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 3\n```\n\n\n:::\n:::\n\n\n#### **Explicit**\n\n<!--\n\nUse `as.*()`\n\n- Logical: `as.logical()`\n- Integer: `as.integer()`\n- Double: `as.double()`\n- Character: `as.character()`\n\n-->\n\n\n::: {.cell}\n::: {.cell-output-display}\n\n```{=html}\n<div id=\"iququhfgjf\" style=\"padding-left:0px;padding-right:0px;padding-top:10px;padding-bottom:10px;overflow-x:auto;overflow-y:auto;width:auto;height:auto;\">\n<style>#iququhfgjf table {\n font-family: system-ui, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';\n -webkit-font-smoothing: antialiased;\n -moz-osx-font-smoothing: grayscale;\n}\n\n#iququhfgjf thead, #iququhfgjf tbody, #iququhfgjf tfoot, #iququhfgjf tr, #iququhfgjf td, #iququhfgjf th {\n border-style: none;\n}\n\n#iququhfgjf p {\n margin: 0;\n padding: 0;\n}\n\n#iququhfgjf .gt_table {\n display: table;\n border-collapse: collapse;\n line-height: normal;\n margin-left: auto;\n margin-right: auto;\n color: #333333;\n font-size: 16px;\n font-weight: normal;\n font-style: normal;\n background-color: #FFFFFF;\n width: auto;\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #A8A8A8;\n border-right-style: none;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #A8A8A8;\n border-left-style: none;\n border-left-width: 2px;\n border-left-color: #D3D3D3;\n}\n\n#iququhfgjf .gt_caption {\n padding-top: 4px;\n padding-bottom: 4px;\n}\n\n#iququhfgjf .gt_title {\n color: #333333;\n font-size: 125%;\n font-weight: initial;\n padding-top: 4px;\n padding-bottom: 4px;\n padding-left: 5px;\n padding-right: 5px;\n border-bottom-color: #FFFFFF;\n border-bottom-width: 0;\n}\n\n#iququhfgjf .gt_subtitle {\n color: #333333;\n font-size: 85%;\n font-weight: initial;\n padding-top: 3px;\n padding-bottom: 5px;\n padding-left: 5px;\n padding-right: 5px;\n border-top-color: #FFFFFF;\n border-top-width: 0;\n}\n\n#iququhfgjf .gt_heading {\n background-color: #FFFFFF;\n text-align: center;\n border-bottom-color: #FFFFFF;\n border-left-style: none;\n border-left-width: 1px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 1px;\n border-right-color: #D3D3D3;\n}\n\n#iququhfgjf .gt_bottom_border {\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n}\n\n#iququhfgjf .gt_col_headings {\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 1px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 1px;\n border-right-color: #D3D3D3;\n}\n\n#iququhfgjf .gt_col_heading {\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: normal;\n text-transform: inherit;\n border-left-style: none;\n border-left-width: 1px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 1px;\n border-right-color: #D3D3D3;\n vertical-align: bottom;\n padding-top: 5px;\n padding-bottom: 6px;\n padding-left: 5px;\n padding-right: 5px;\n overflow-x: hidden;\n}\n\n#iququhfgjf .gt_column_spanner_outer {\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: normal;\n text-transform: inherit;\n padding-top: 0;\n padding-bottom: 0;\n padding-left: 4px;\n padding-right: 4px;\n}\n\n#iququhfgjf .gt_column_spanner_outer:first-child {\n padding-left: 0;\n}\n\n#iququhfgjf .gt_column_spanner_outer:last-child {\n padding-right: 0;\n}\n\n#iququhfgjf .gt_column_spanner {\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n vertical-align: bottom;\n padding-top: 5px;\n padding-bottom: 5px;\n overflow-x: hidden;\n display: inline-block;\n width: 100%;\n}\n\n#iququhfgjf .gt_spanner_row {\n border-bottom-style: hidden;\n}\n\n#iququhfgjf .gt_group_heading {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: initial;\n text-transform: inherit;\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 1px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 1px;\n border-right-color: #D3D3D3;\n vertical-align: middle;\n text-align: left;\n}\n\n#iququhfgjf .gt_empty_group_heading {\n padding: 0.5px;\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: initial;\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n vertical-align: middle;\n}\n\n#iququhfgjf .gt_from_md > :first-child {\n margin-top: 0;\n}\n\n#iququhfgjf .gt_from_md > :last-child {\n margin-bottom: 0;\n}\n\n#iququhfgjf .gt_row {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n margin: 10px;\n border-top-style: solid;\n border-top-width: 1px;\n border-top-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 1px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 1px;\n border-right-color: #D3D3D3;\n vertical-align: middle;\n overflow-x: hidden;\n}\n\n#iququhfgjf .gt_stub {\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: initial;\n text-transform: inherit;\n border-right-style: solid;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#iququhfgjf .gt_stub_row_group {\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: initial;\n text-transform: inherit;\n border-right-style: solid;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n padding-left: 5px;\n padding-right: 5px;\n vertical-align: top;\n}\n\n#iququhfgjf .gt_row_group_first td {\n border-top-width: 2px;\n}\n\n#iququhfgjf .gt_row_group_first th {\n border-top-width: 2px;\n}\n\n#iququhfgjf .gt_summary_row {\n color: #333333;\n background-color: #FFFFFF;\n text-transform: inherit;\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#iququhfgjf .gt_first_summary_row {\n border-top-style: solid;\n border-top-color: #D3D3D3;\n}\n\n#iququhfgjf .gt_first_summary_row.thick {\n border-top-width: 2px;\n}\n\n#iququhfgjf .gt_last_summary_row {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n}\n\n#iququhfgjf .gt_grand_summary_row {\n color: #333333;\n background-color: #FFFFFF;\n text-transform: inherit;\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#iququhfgjf .gt_first_grand_summary_row {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n border-top-style: double;\n border-top-width: 6px;\n border-top-color: #D3D3D3;\n}\n\n#iququhfgjf .gt_last_grand_summary_row_top {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n border-bottom-style: double;\n border-bottom-width: 6px;\n border-bottom-color: #D3D3D3;\n}\n\n#iququhfgjf .gt_striped {\n background-color: rgba(128, 128, 128, 0.05);\n}\n\n#iququhfgjf .gt_table_body {\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n}\n\n#iququhfgjf .gt_footnotes {\n color: #333333;\n background-color: #FFFFFF;\n border-bottom-style: none;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 2px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n}\n\n#iququhfgjf .gt_footnote {\n margin: 0px;\n font-size: 90%;\n padding-top: 4px;\n padding-bottom: 4px;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#iququhfgjf .gt_sourcenotes {\n color: #333333;\n background-color: #FFFFFF;\n border-bottom-style: none;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 2px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n}\n\n#iququhfgjf .gt_sourcenote {\n font-size: 90%;\n padding-top: 4px;\n padding-bottom: 4px;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#iququhfgjf .gt_left {\n text-align: left;\n}\n\n#iququhfgjf .gt_center {\n text-align: center;\n}\n\n#iququhfgjf .gt_right {\n text-align: right;\n font-variant-numeric: tabular-nums;\n}\n\n#iququhfgjf .gt_font_normal {\n font-weight: normal;\n}\n\n#iququhfgjf .gt_font_bold {\n font-weight: bold;\n}\n\n#iququhfgjf .gt_font_italic {\n font-style: italic;\n}\n\n#iququhfgjf .gt_super {\n font-size: 65%;\n}\n\n#iququhfgjf .gt_footnote_marks {\n font-size: 75%;\n vertical-align: 0.4em;\n position: initial;\n}\n\n#iququhfgjf .gt_asterisk {\n font-size: 100%;\n vertical-align: 0;\n}\n\n#iququhfgjf .gt_indent_1 {\n text-indent: 5px;\n}\n\n#iququhfgjf .gt_indent_2 {\n text-indent: 10px;\n}\n\n#iququhfgjf .gt_indent_3 {\n text-indent: 15px;\n}\n\n#iququhfgjf .gt_indent_4 {\n text-indent: 20px;\n}\n\n#iququhfgjf .gt_indent_5 {\n text-indent: 25px;\n}\n\n#iququhfgjf .katex-display {\n display: inline-flex !important;\n margin-bottom: 0.75em !important;\n}\n\n#iququhfgjf div.Reactable > div.rt-table > div.rt-thead > div.rt-tr.rt-tr-group-header > div.rt-th-group:after {\n height: 0px !important;\n}\n</style>\n<table class=\"gt_table\" data-quarto-disable-processing=\"false\" data-quarto-bootstrap=\"false\">\n <thead>\n <tr class=\"gt_heading\">\n <td colspan=\"6\" class=\"gt_heading gt_title gt_font_normal gt_bottom_border\" style>Coercion of Atomic Vectors<span class=\"gt_footnote_marks\" style=\"white-space:nowrap;font-style:italic;font-weight:normal;line-height:0;\"><sup>1</sup></span></td>\n </tr>\n \n <tr class=\"gt_col_headings\">\n <th class=\"gt_col_heading gt_columns_bottom_border gt_center\" rowspan=\"1\" colspan=\"1\" scope=\"col\" id=\"var_names\">name</th>\n <th class=\"gt_col_heading gt_columns_bottom_border gt_center\" rowspan=\"1\" colspan=\"1\" scope=\"col\" id=\"var_values\">value</th>\n <th class=\"gt_col_heading gt_columns_bottom_border gt_center\" rowspan=\"1\" colspan=\"1\" scope=\"col\" id=\"as_logical\">as.logical()</th>\n <th class=\"gt_col_heading gt_columns_bottom_border gt_center\" rowspan=\"1\" colspan=\"1\" scope=\"col\" id=\"as_integer\">as.integer()</th>\n <th class=\"gt_col_heading gt_columns_bottom_border gt_center\" rowspan=\"1\" colspan=\"1\" scope=\"col\" id=\"as_double\">as.double()</th>\n <th class=\"gt_col_heading gt_columns_bottom_border gt_center\" rowspan=\"1\" colspan=\"1\" scope=\"col\" id=\"as_character\">as.character()</th>\n </tr>\n </thead>\n <tbody class=\"gt_table_body\">\n <tr><td headers=\"var_names\" class=\"gt_row gt_center\">lgl_var</td>\n<td headers=\"var_values\" class=\"gt_row gt_center\">TRUE, FALSE</td>\n<td headers=\"as_logical\" class=\"gt_row gt_center\" style=\"background-color: #F9E3D6;\">TRUE FALSE</td>\n<td headers=\"as_integer\" class=\"gt_row gt_center\" style=\"background-color: #E0FFFF;\">1 0</td>\n<td headers=\"as_double\" class=\"gt_row gt_center\" style=\"background-color: #F9E3D6;\">1 0</td>\n<td headers=\"as_character\" class=\"gt_row gt_center\" style=\"background-color: #E0FFFF;\">'TRUE' 'FALSE'</td></tr>\n <tr><td headers=\"var_names\" class=\"gt_row gt_center\">int_var</td>\n<td headers=\"var_values\" class=\"gt_row gt_center\">1L, 6L, 10L</td>\n<td headers=\"as_logical\" class=\"gt_row gt_center\" style=\"background-color: #F9E3D6;\">TRUE TRUE TRUE</td>\n<td headers=\"as_integer\" class=\"gt_row gt_center\" style=\"background-color: #E0FFFF;\">1 6 10</td>\n<td headers=\"as_double\" class=\"gt_row gt_center\" style=\"background-color: #F9E3D6;\">1 6 10</td>\n<td headers=\"as_character\" class=\"gt_row gt_center\" style=\"background-color: #E0FFFF;\">'1' '6' '10'</td></tr>\n <tr><td headers=\"var_names\" class=\"gt_row gt_center\">dbl_var</td>\n<td headers=\"var_values\" class=\"gt_row gt_center\">1, 2.5, 4.5</td>\n<td headers=\"as_logical\" class=\"gt_row gt_center\" style=\"background-color: #F9E3D6;\">TRUE TRUE TRUE</td>\n<td headers=\"as_integer\" class=\"gt_row gt_center\" style=\"background-color: #E0FFFF;\">1 2 4</td>\n<td headers=\"as_double\" class=\"gt_row gt_center\" style=\"background-color: #F9E3D6;\">1.0 2.5 4.5</td>\n<td headers=\"as_character\" class=\"gt_row gt_center\" style=\"background-color: #E0FFFF;\">'1' '2.5' '4.5'</td></tr>\n <tr><td headers=\"var_names\" class=\"gt_row gt_center\">chr_var</td>\n<td headers=\"var_values\" class=\"gt_row gt_center\">'these are', 'some strings'</td>\n<td headers=\"as_logical\" class=\"gt_row gt_center\" style=\"background-color: #F9E3D6;\">NA NA</td>\n<td headers=\"as_integer\" class=\"gt_row gt_center\" style=\"background-color: #E0FFFF;\">NA_integer</td>\n<td headers=\"as_double\" class=\"gt_row gt_center\" style=\"background-color: #F9E3D6;\">NA_double</td>\n<td headers=\"as_character\" class=\"gt_row gt_center\" style=\"background-color: #E0FFFF;\">'these are', 'some strings'</td></tr>\n </tbody>\n \n <tfoot class=\"gt_footnotes\">\n <tr>\n <td class=\"gt_footnote\" colspan=\"6\"><span class=\"gt_footnote_marks\" style=\"white-space:nowrap;font-style:italic;font-weight:normal;line-height:0;\"><sup>1</sup></span> Source: https://adv-r.hadley.nz/index.html</td>\n </tr>\n </tfoot>\n</table>\n</div>\n```\n\n:::\n:::\n\n\nBut note that coercion may fail in one of two ways, or both:\n\n- With warning/error\n- NAs\n\n\n::: {.cell}\n\n```{.r .cell-code}\nas.integer(c(1, 2, \"three\"))\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning: NAs introduced by coercion\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 2 NA\n```\n\n\n:::\n:::\n\n\n### Exercises\n\n1. How do you create raw and complex scalars?\n\n<details><summary>Answer(s)</summary>\n\n::: {.cell}\n\n```{.r .cell-code}\nas.raw(42)\n#> [1] 2a\ncharToRaw(\"A\")\n#> [1] 41\ncomplex(length.out = 1, real = 1, imaginary = 1)\n#> [1] 1+1i\n```\n:::\n\n</details>\n\n2. Test your knowledge of the vector coercion rules by predicting the output of the following uses of c():\n\n\n::: {.cell}\n\n```{.r .cell-code}\nc(1, FALSE)\nc(\"a\", 1)\nc(TRUE, 1L)\n```\n:::\n\n\n<details><summary>Answer(s)</summary>\n\n::: {.cell}\n\n```{.r .cell-code}\nc(1, FALSE) # will be coerced to double -> 1 0\nc(\"a\", 1) # will be coerced to character -> \"a\" \"1\"\nc(TRUE, 1L) # will be coerced to integer -> 1 1\n```\n:::\n\n</details>\n\n3. Why is `1 == \"1\"` true? Why is `-1 < FALSE` true? Why is `\"one\" < 2` false?\n\n<details><summary>Answer(s)</summary>\nThese comparisons are carried out by operator-functions (==, <), which coerce their arguments to a common type. In the examples above, these types will be character, double and character: 1 will be coerced to \"1\", FALSE is represented as 0 and 2 turns into \"2\" (and numbers precede letters in lexicographic order (may depend on locale)).\n\n</details>\n\n4. Why is the default missing value, NA, a logical vector? What’s special about logical vectors?\n\n<details><summary>Answer(s)</summary>\nThe presence of missing values shouldn’t affect the type of an object. Recall that there is a type-hierarchy for coercion from character → double → integer → logical. When combining `NA`s with other atomic types, the `NA`s will be coerced to integer (`NA_integer_`), double (`NA_real_`) or character (`NA_character_`) and not the other way round. If `NA` were a character and added to a set of other values all of these would be coerced to character as well.\n</details>\n\n5. Precisely what do `is.atomic()`, `is.numeric()`, and `is.vector()` test for?\n\n<details><summary>Answer(s)</summary>\nThe documentation states that:\n\n* `is.atomic()` tests if an object is an atomic vector (as defined in *Advanced R*) or is `NULL` (!).\n* `is.numeric()` tests if an object has type integer or double and is not of class `factor`, `Date`, `POSIXt` or `difftime`.\n* `is.vector()` tests if an object is a vector (as defined in *Advanced R*) or an expression and has no attributes, apart from names.\n\nAtomic vectors are defined in *Advanced R* as objects of type logical, integer, double, complex, character or raw. Vectors are defined as atomic vectors or lists.\n</details>\n\n\n\n## Attributes\n\nAttributes are name-value pairs that attach metadata to an object(vector).\n\n* **Name-value pairs**: attributes have a name and a value\n* **Metadata**: not data itself, but data about the data\n\n### How? \n\n#### Getting and Setting\n\nThree functions:\n\n1. retrieve and modify single attributes with `attr()`\n2. retrieve en masse with `attributes()`\n3. set en masse with `structure()`\n\n**Single attribute**\n\nUse `attr()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# some object\na <- c(1, 2, 3)\n\n# set attribute\nattr(x = a, which = \"attribute_name\") <- \"some attribute\"\n\n# get attribute\nattr(a, \"attribute_name\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"some attribute\"\n```\n\n\n:::\n:::\n\n\n**Multiple attributes**\n\nTo set multiple attributes, use `structure()` To get multiple attributes, use `attributes()`\n\n\n::: {.cell}\n\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\na <- 1:3\nattr(a, \"x\") <- \"abcdef\"\nattr(a, \"x\")\n#> [1] \"abcdef\"\n\nattr(a, \"y\") <- 4:6\nstr(attributes(a))\n#> List of 2\n#> $ x: chr \"abcdef\"\n#> $ y: int [1:3] 4 5 6\n\n# Or equivalently\na <- structure(\n 1:3, \n x = \"abcdef\",\n y = 4:6\n)\nstr(attributes(a))\n#> List of 2\n#> $ x: chr \"abcdef\"\n#> $ y: int [1:3] 4 5 6\n```\n:::\n\n\n \n\n### Why\n\nThree particularly important attributes: \n\n1. **names** - a character vector giving each element a name\n2. **dimension** - (or dim) turns vectors into matrices and arrays \n3. **class** - powers the S3 object system (we'll learn more about this in chapter 13)\n\nMost attributes are lost by most operations. Only two attributes are routinely preserved: names and dimension.\n\n#### Names\n\n~~Three~~ Four ways to name:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# (1) When creating it: \nx <- c(A = 1, B = 2, C = 3)\nx\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> A B C \n#> 1 2 3\n```\n\n\n:::\n\n```{.r .cell-code}\n# (2) By assigning a character vector to names()\ny <- 1:3\nnames(y) <- c(\"a\", \"b\", \"c\")\ny\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a b c \n#> 1 2 3\n```\n\n\n:::\n\n```{.r .cell-code}\n# (3) Inline, with setNames():\nz <- setNames(1:3, c(\"a\", \"b\", \"c\"))\nz\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a b c \n#> 1 2 3\n```\n\n\n:::\n:::\n\n\n \n\n\n::: {.cell}\n\n```{.r .cell-code}\n# (4) By setting names--with {rlang}\na <- 1:3\nrlang::set_names(\n x = a,\n nm = c(\"a\", \"b\", \"c\")\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a b c \n#> 1 2 3\n```\n\n\n:::\n:::\n\n\n \n\n* You can remove names from a vector by using `x <- unname(x)` or `names(x) <- NULL`.\n* Thematically but not directly related: labelled class vectors with `haven::labelled()`\n\n\n#### Dimensions\n\nCreate matrices and arrays with `matrix()` and `array()`, or by using the assignment form of `dim()`:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Two scalar arguments specify row and column sizes\nx <- matrix(1:6, nrow = 2, ncol = 3)\nx\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [,1] [,2] [,3]\n#> [1,] 1 3 5\n#> [2,] 2 4 6\n```\n\n\n:::\n\n```{.r .cell-code}\n# One vector argument to describe all dimensions\ny <- array(1:24, c(2, 3, 4)) # rows, columns, no of arrays\ny\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> , , 1\n#> \n#> [,1] [,2] [,3]\n#> [1,] 1 3 5\n#> [2,] 2 4 6\n#> \n#> , , 2\n#> \n#> [,1] [,2] [,3]\n#> [1,] 7 9 11\n#> [2,] 8 10 12\n#> \n#> , , 3\n#> \n#> [,1] [,2] [,3]\n#> [1,] 13 15 17\n#> [2,] 14 16 18\n#> \n#> , , 4\n#> \n#> [,1] [,2] [,3]\n#> [1,] 19 21 23\n#> [2,] 20 22 24\n```\n\n\n:::\n\n```{.r .cell-code}\n# You can also modify an object in place by setting dim()\nz <- 1:6\ndim(z) <- c(2, 3) # rows, columns\nz\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [,1] [,2] [,3]\n#> [1,] 1 3 5\n#> [2,] 2 4 6\n```\n\n\n:::\n\n```{.r .cell-code}\na <- 1:24\ndim(a) <- c(2, 3, 4) # rows, columns, no of arrays\na\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> , , 1\n#> \n#> [,1] [,2] [,3]\n#> [1,] 1 3 5\n#> [2,] 2 4 6\n#> \n#> , , 2\n#> \n#> [,1] [,2] [,3]\n#> [1,] 7 9 11\n#> [2,] 8 10 12\n#> \n#> , , 3\n#> \n#> [,1] [,2] [,3]\n#> [1,] 13 15 17\n#> [2,] 14 16 18\n#> \n#> , , 4\n#> \n#> [,1] [,2] [,3]\n#> [1,] 19 21 23\n#> [2,] 20 22 24\n```\n\n\n:::\n:::\n\n\n##### Functions for working with vectors, matrices and arrays:\n\nVector | Matrix\t| Array\n:----- | :---------- | :-----\n`names()` | `rownames()`, `colnames()` | `dimnames()`\n`length()` | `nrow()`, `ncol()` | `dim()`\n`c()` | `rbind()`, `cbind()` | `abind::abind()`\n— | `t()` | `aperm()`\n`is.null(dim(x))` | `is.matrix()` | `is.array()`\n\n* **Caution**: A vector without a `dim` attribute set is often thought of as 1-dimensional, but actually has `NULL` dimensions.\n* One dimension?\n\n\n::: {.cell}\n\n```{.r .cell-code}\nstr(1:3) # 1d vector\n#> int [1:3] 1 2 3\nstr(matrix(1:3, ncol = 1)) # column vector\n#> int [1:3, 1] 1 2 3\nstr(matrix(1:3, nrow = 1)) # row vector\n#> int [1, 1:3] 1 2 3\nstr(array(1:3, 3)) # \"array\" vector\n#> int [1:3(1d)] 1 2 3\n```\n:::\n\n\n\n### Exercises\n\n1. How is `setNames()` implemented? How is `unname()` implemented? Read the source code.\n\n<details><summary>Answer(s)</summary>\n`setNames()` is implemented as:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsetNames <- function(object = nm, nm) {\n names(object) <- nm\n object\n}\n```\n:::\n\n\nBecause the data argument comes first, `setNames()` also works well with the magrittr-pipe operator. When no first argument is given, the result is a named vector (this is rather untypical as required arguments usually come first):\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsetNames( , c(\"a\", \"b\", \"c\"))\n#> a b c \n#> \"a\" \"b\" \"c\"\n```\n:::\n\n\n`unname()` is implemented in the following way:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nunname <- function(obj, force = FALSE) {\n if (!is.null(names(obj))) \n names(obj) <- NULL\n if (!is.null(dimnames(obj)) && (force || !is.data.frame(obj))) \n dimnames(obj) <- NULL\n obj\n}\n```\n:::\n\n\n`unname()` removes existing names (or dimnames) by setting them to `NULL`.\n</details>\n\n2. What does `dim()` return when applied to a 1-dimensional vector? When might you use `NROW()` or `NCOL()`?\n\n<details><summary>Answer(s)</summary>\n\n> dim() will return NULL when applied to a 1d vector.\n\nOne may want to use `NROW()` or `NCOL()` to handle atomic vectors, lists and NULL values in the same way as one column matrices or data frames. For these objects `nrow()` and `ncol()` return NULL:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- 1:10\n\n# Return NULL\nnrow(x)\n#> NULL\nncol(x)\n#> NULL\n\n# Pretend it's a column vector\nNROW(x)\n#> [1] 10\nNCOL(x)\n#> [1] 1\n```\n:::\n\n\n</details>\n\n3. How would you describe the following three objects? What makes them different from `1:5`?\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx1 <- array(1:5, c(1, 1, 5))\nx2 <- array(1:5, c(1, 5, 1))\nx3 <- array(1:5, c(5, 1, 1))\n```\n:::\n\n\n<details><summary>Answer(s)</summary>\n\n::: {.cell}\n\n```{.r .cell-code}\nx1 <- array(1:5, c(1, 1, 5)) # 1 row, 1 column, 5 in third dim.\nx2 <- array(1:5, c(1, 5, 1)) # 1 row, 5 columns, 1 in third dim.\nx3 <- array(1:5, c(5, 1, 1)) # 5 rows, 1 column, 1 in third dim.\n```\n:::\n\n</details>\n\n\n4. An early draft used this code to illustrate `structure()`:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nstructure(1:5, comment = \"my attribute\")\n#> [1] 1 2 3 4 5\n```\n:::\n\n\nBut when you print that object you don’t see the comment attribute. Why? Is the attribute missing, or is there something else special about it?\n\n<details><summary>Answer(s)</summary>\nThe documentation states (see `?comment`):\n\n> Contrary to other attributes, the comment is not printed (by print or print.default).\n\nAlso, from `?attributes:`\n\n> Note that some attributes (namely class, comment, dim, dimnames, names, row.names and tsp) are treated specially and have restrictions on the values which can be set.\n\nWe can retrieve comment attributes by calling them explicitly:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nfoo <- structure(1:5, comment = \"my attribute\")\n\nattributes(foo)\n#> $comment\n#> [1] \"my attribute\"\nattr(foo, which = \"comment\")\n#> [1] \"my attribute\"\n```\n:::\n\n\n</details>\n\n\n\n## **Class** - S3 atomic vectors\n\n \n\nCredit: [Advanced R](https://adv-r.hadley.nz/index.html) by Hadley Wickham\n\n**Having a class attribute turns an object into an S3 object.**\n\nWhat makes S3 atomic vectors different?\n\n1. behave differently from a regular vector when passed to a generic function \n2. often store additional information in other attributes\n\nFour important S3 vectors used in base R:\n\n1. **Factors** (categorical data)\n2. **Dates**\n3. **Date-times** (POSIXct)\n4. **Durations** (difftime)\n\n### Factors\n\nA factor is a vector used to store categorical data that can contain only predefined values.\n\nFactors are integer vectors with:\n\n- Class: \"factor\"\n- Attributes: \"levels\", or the set of allowed values\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncolors = c('red', 'blue', 'green','red','red', 'green')\n# Build a factor\na_factor <- factor(\n # values\n x = colors,\n # exhaustive list of values\n levels = c('red', 'blue', 'green', 'yellow')\n)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Useful when some possible values are not present in the data\ntable(colors)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> colors\n#> blue green red \n#> 1 2 3\n```\n\n\n:::\n\n```{.r .cell-code}\ntable(a_factor)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a_factor\n#> red blue green yellow \n#> 3 1 2 0\n```\n\n\n:::\n\n```{.r .cell-code}\n# - type\ntypeof(a_factor)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"integer\"\n```\n\n\n:::\n\n```{.r .cell-code}\nclass(a_factor)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"factor\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# - attributes\nattributes(a_factor)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $levels\n#> [1] \"red\" \"blue\" \"green\" \"yellow\"\n#> \n#> $class\n#> [1] \"factor\"\n```\n\n\n:::\n:::\n\n\n#### Custom Order\n\nFactors can be ordered. This can be useful for models or visualizations where order matters.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvalues <- c('high', 'med', 'low', 'med', 'high', 'low', 'med', 'high')\n\nordered_factor <- ordered(\n # values\n x = values,\n # levels in ascending order\n levels = c('low', 'med', 'high')\n)\n\n# Inspect\nordered_factor\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] high med low med high low med high\n#> Levels: low < med < high\n```\n\n\n:::\n\n```{.r .cell-code}\ntable(values)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> values\n#> high low med \n#> 3 2 3\n```\n\n\n:::\n\n```{.r .cell-code}\ntable(ordered_factor)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> ordered_factor\n#> low med high \n#> 2 3 3\n```\n\n\n:::\n:::\n\n\n### Dates\n\nDates are:\n\n- Double vectors\n- With class \"Date\"\n- No other attributes\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnotes_date <- Sys.Date()\n\n# type\ntypeof(notes_date)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"double\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# class\nattributes(notes_date)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $class\n#> [1] \"Date\"\n```\n\n\n:::\n:::\n\n\nThe double component represents the number of days since since the [Unix epoch](https://en.wikipedia.org/wiki/Unix_time) `1970-01-01`\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndate <- as.Date(\"1970-02-01\")\nunclass(date)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 31\n```\n\n\n:::\n:::\n\n\n### Date-times\n\nThere are 2 Date-time representations in base R:\n\n- POSIXct, where \"ct\" denotes *calendar time*\n- POSIXlt, where \"lt\" designates *local time*\n\n<!--\n\nJust for fun:\n\"How to pronounce 'POSIXct'?\"\nhttps://www.howtopronounce.com/posixct\n\n-->\n\nWe'll focus on POSIXct because:\n\n- Simplest\n- Built on an atomic (double) vector\n- Most appropriate for use in a data frame\n\nLet's now build and deconstruct a Date-time\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Build\nnote_date_time <- as.POSIXct(\n x = Sys.time(), # time\n tz = \"America/New_York\" # time zone, used only for formatting\n)\n\n# Inspect\nnote_date_time\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"2025-08-04 12:16:00 EDT\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# - type\ntypeof(note_date_time)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"double\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# - attributes\nattributes(note_date_time)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $class\n#> [1] \"POSIXct\" \"POSIXt\" \n#> \n#> $tzone\n#> [1] \"America/New_York\"\n```\n\n\n:::\n\n```{.r .cell-code}\nstructure(note_date_time, tzone = \"Europe/Paris\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"2025-08-04 18:16:00 CEST\"\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndate_time <- as.POSIXct(\"2024-02-22 12:34:56\", tz = \"EST\")\nunclass(date_time)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1708623296\n#> attr(,\"tzone\")\n#> [1] \"EST\"\n```\n\n\n:::\n:::\n\n\n\n### Durations\n\nDurations represent the amount of time between pairs of dates or date-times.\n\n- Double vectors\n- Class: \"difftime\"\n- Attributes: \"units\", or the unit of duration (e.g., weeks, hours, minutes, seconds, etc.)\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Construct\none_minute <- as.difftime(1, units = \"mins\")\n# Inspect\none_minute\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Time difference of 1 mins\n```\n\n\n:::\n\n```{.r .cell-code}\n# Dissect\n# - type\ntypeof(one_minute)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"double\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# - attributes\nattributes(one_minute)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $class\n#> [1] \"difftime\"\n#> \n#> $units\n#> [1] \"mins\"\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntime_since_01_01_1970 <- notes_date - date\ntime_since_01_01_1970\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Time difference of 20273 days\n```\n\n\n:::\n:::\n\n\n\nSee also:\n\n- [`lubridate::make_difftime()`](https://lubridate.tidyverse.org/reference/make_difftime.html)\n- [`clock::date_time_build()`](https://clock.r-lib.org/reference/date_time_build.html)\n\n\n### Exercises\n\n1. What sort of object does `table()` return? What is its type? What attributes does it have? How does the dimensionality change as you tabulate more variables?\n\n<details><summary>Answer(s)</summary>\n\n`table()` returns a contingency table of its input variables. It is implemented as an integer vector with class table and dimensions (which makes it act like an array). Its attributes are dim (dimensions) and dimnames (one name for each input column). The dimensions correspond to the number of unique values (factor levels) in each input variable.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- table(mtcars[c(\"vs\", \"cyl\", \"am\")])\n\ntypeof(x)\n#> [1] \"integer\"\nattributes(x)\n#> $dim\n#> [1] 2 3 2\n#> \n#> $dimnames\n#> $dimnames$vs\n#> [1] \"0\" \"1\"\n#> \n#> $dimnames$cyl\n#> [1] \"4\" \"6\" \"8\"\n#> \n#> $dimnames$am\n#> [1] \"0\" \"1\"\n#> \n#> \n#> $class\n#> [1] \"table\"\n```\n:::\n\n</details>\n\n2. What happens to a factor when you modify its levels?\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf1 <- factor(letters)\nlevels(f1) <- rev(levels(f1))\n```\n:::\n\n\n<details><summary>Answer(s)</summary>\nThe underlying integer values stay the same, but the levels are changed, making it look like the data has changed.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf1 <- factor(letters)\nf1\n#> [1] a b c d e f g h i j k l m n o p q r s t u v w x y z\n#> Levels: a b c d e f g h i j k l m n o p q r s t u v w x y z\nas.integer(f1)\n#> [1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25\n#> [26] 26\n\nlevels(f1) <- rev(levels(f1))\nf1\n#> [1] z y x w v u t s r q p o n m l k j i h g f e d c b a\n#> Levels: z y x w v u t s r q p o n m l k j i h g f e d c b a\nas.integer(f1)\n#> [1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25\n#> [26] 26\n```\n:::\n\n</details>\n\n3. What does this code do? How do `f2` and `f3` differ from `f1`?\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf2 <- rev(factor(letters))\nf3 <- factor(letters, levels = rev(letters))\n```\n:::\n\n\n<details><summary>Answer(s)</summary>\nFor `f2` and `f3` either the order of the factor elements or its levels are being reversed. For `f1` both transformations are occurring.\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Reverse element order\n(f2 <- rev(factor(letters)))\n#> [1] z y x w v u t s r q p o n m l k j i h g f e d c b a\n#> Levels: a b c d e f g h i j k l m n o p q r s t u v w x y z\nas.integer(f2)\n#> [1] 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2\n#> [26] 1\n\n# Reverse factor levels (when creating factor)\n(f3 <- factor(letters, levels = rev(letters)))\n#> [1] a b c d e f g h i j k l m n o p q r s t u v w x y z\n#> Levels: z y x w v u t s r q p o n m l k j i h g f e d c b a\nas.integer(f3)\n#> [1] 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2\n#> [26] 1\n```\n:::\n\n</details>\n\n\n\n\n\n\n## Lists\n\n* sometimes called a generic vector or recursive vector\n* Recall ([section 2.3.3](https://adv-r.hadley.nz/names-values.html#list-references)): each element is really a *reference* to another object\n* an be composed of elements of different types (as opposed to atomic vectors which must be of only one type)\n\n### Constructing\n\nSimple lists:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Construct\nsimple_list <- list(\n c(TRUE, FALSE), # logicals\n 1:20, # integers\n c(1.2, 2.3, 3.4), # doubles\n c(\"primo\", \"secundo\", \"tercio\") # characters\n)\n\nsimple_list\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] TRUE FALSE\n#> \n#> [[2]]\n#> [1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20\n#> \n#> [[3]]\n#> [1] 1.2 2.3 3.4\n#> \n#> [[4]]\n#> [1] \"primo\" \"secundo\" \"tercio\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# Inspect\n# - type\ntypeof(simple_list)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"list\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# - structure\nstr(simple_list)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> List of 4\n#> $ : logi [1:2] TRUE FALSE\n#> $ : int [1:20] 1 2 3 4 5 6 7 8 9 10 ...\n#> $ : num [1:3] 1.2 2.3 3.4\n#> $ : chr [1:3] \"primo\" \"secundo\" \"tercio\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# Accessing\nsimple_list[1]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] TRUE FALSE\n```\n\n\n:::\n\n```{.r .cell-code}\nsimple_list[2]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20\n```\n\n\n:::\n\n```{.r .cell-code}\nsimple_list[3]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] 1.2 2.3 3.4\n```\n\n\n:::\n\n```{.r .cell-code}\nsimple_list[4]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] \"primo\" \"secundo\" \"tercio\"\n```\n\n\n:::\n\n```{.r .cell-code}\nsimple_list[[1]][2]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] FALSE\n```\n\n\n:::\n\n```{.r .cell-code}\nsimple_list[[2]][8]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 8\n```\n\n\n:::\n\n```{.r .cell-code}\nsimple_list[[3]][2]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2.3\n```\n\n\n:::\n\n```{.r .cell-code}\nsimple_list[[4]][3]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"tercio\"\n```\n\n\n:::\n:::\n\n\nEven Simpler List\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Construct\nsimpler_list <- list(TRUE, FALSE, \n 1, 2, 3, 4, 5, \n 1.2, 2.3, 3.4, \n \"primo\", \"secundo\", \"tercio\")\n\n# Accessing\nsimpler_list[1]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\nsimpler_list[5]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] 3\n```\n\n\n:::\n\n```{.r .cell-code}\nsimpler_list[9]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] 2.3\n```\n\n\n:::\n\n```{.r .cell-code}\nsimpler_list[11]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] \"primo\"\n```\n\n\n:::\n:::\n\n\nNested lists:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnested_list <- list(\n # first level\n list(\n # second level\n list(\n # third level\n list(1)\n )\n )\n)\n\nstr(nested_list)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> List of 1\n#> $ :List of 1\n#> ..$ :List of 1\n#> .. ..$ :List of 1\n#> .. .. ..$ : num 1\n```\n\n\n:::\n:::\n\n\nLike JSON.\n\nCombined lists\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# with list()\nlist_comb1 <- list(list(1, 2), list(3, 4))\n# with c()\nlist_comb2 <- c(list(1, 2), list(3, 4))\n\n# compare structure\nstr(list_comb1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> List of 2\n#> $ :List of 2\n#> ..$ : num 1\n#> ..$ : num 2\n#> $ :List of 2\n#> ..$ : num 3\n#> ..$ : num 4\n```\n\n\n:::\n\n```{.r .cell-code}\nstr(list_comb2)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> List of 4\n#> $ : num 1\n#> $ : num 2\n#> $ : num 3\n#> $ : num 4\n```\n\n\n:::\n\n```{.r .cell-code}\n# does this work if they are different data types?\nlist_comb3 <- c(list(1, 2), list(TRUE, FALSE))\nstr(list_comb3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> List of 4\n#> $ : num 1\n#> $ : num 2\n#> $ : logi TRUE\n#> $ : logi FALSE\n```\n\n\n:::\n:::\n\n\n### Testing\n\nCheck that is a list:\n\n- `is.list()`\n- \\`rlang::is_list()\\`\\`\n\nThe two do the same, except that the latter can check for the number of elements\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# is list\nbase::is.list(list_comb2)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\nrlang::is_list(list_comb2)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\n# is list of 4 elements\nrlang::is_list(x = list_comb2, n = 4)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\n# is a vector (of a special type)\n# remember the family tree?\nrlang::is_vector(list_comb2)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n### Coercion\n\nUse `as.list()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlist(1:3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] 1 2 3\n```\n\n\n:::\n\n```{.r .cell-code}\nas.list(1:3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] 1\n#> \n#> [[2]]\n#> [1] 2\n#> \n#> [[3]]\n#> [1] 3\n```\n\n\n:::\n:::\n\n\n### Matrices and arrays\n\nAlthough not often used, the dimension attribute can be added to create **list-matrices** or **list-arrays**.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nl <- list(1:3, \"a\", TRUE, 1.0)\ndim(l) <- c(2, 2)\nl\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [,1] [,2]\n#> [1,] integer,3 TRUE\n#> [2,] \"a\" 1\n```\n\n\n:::\n\n```{.r .cell-code}\nl[[1, 1]]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 2 3\n```\n\n\n:::\n:::\n\n\n\n### Exercises\n\n1. List all the ways that a list differs from an atomic vector.\n\n<details><summary>Answer(s)</summary>\n\n* Atomic vectors are always homogeneous (all elements must be of the same type). Lists may be heterogeneous (the elements can be of different types) as described in the introduction of the vectors chapter.\n* Atomic vectors point to one address in memory, while lists contain a separate reference for each element. (This was described in the list sections of the vectors and the names and values chapters.)\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ref(1:2)\n#> [1:0x7fcd936f6e80] <int>\nlobstr::ref(list(1:2, 2))\n#> █ [1:0x7fcd93d53048] <list> \n#> ├─[2:0x7fcd91377e40] <int> \n#> └─[3:0x7fcd93b41eb0] <dbl>\n```\n:::\n\n\n\n* Subsetting with out-of-bounds and NA values leads to different output. For example, [ returns NA for atomics and NULL for lists. (This is described in more detail within the subsetting chapter.)\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Subsetting atomic vectors\n(1:2)[3]\n#> [1] NA\n(1:2)[NA]\n#> [1] NA NA\n\n# Subsetting lists\nas.list(1:2)[3]\n#> [[1]]\n#> NULL\nas.list(1:2)[NA]\n#> [[1]]\n#> NULL\n#> \n#> [[2]]\n#> NULL\n```\n:::\n\n\n\n</details>\n\n2. Why do you need to use `unlist()` to convert a list to an atomic vector? Why doesn’t `as.vector()` work?\n\n<details><summary>Answer(s)</summary>\nA list is already a vector, though not an atomic one! Note that as.vector() and is.vector() use different definitions of “vector!”\n\n\n::: {.cell}\n\n```{.r .cell-code}\nis.vector(as.vector(mtcars))\n#> [1] FALSE\n```\n:::\n\n\n</details>\n\n3. Compare and contrast `c()` and `unlist()` when combining a date and date-time into a single vector.\n\n<details><summary>Answer(s)</summary>\nDate and date-time objects are both built upon doubles. While dates store the number of days since the reference date 1970-01-01 (also known as “the Epoch”) in days, date-time-objects (POSIXct) store the time difference to this date in seconds.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndate <- as.Date(\"1970-01-02\")\ndttm_ct <- as.POSIXct(\"1970-01-01 01:00\", tz = \"UTC\")\n\n# Internal representations\nunclass(date)\n#> [1] 1\nunclass(dttm_ct)\n#> [1] 3600\n#> attr(,\"tzone\")\n#> [1] \"UTC\"\n```\n:::\n\n\nAs the c() generic only dispatches on its first argument, combining date and date-time objects via c() could lead to surprising results in older R versions (pre R 4.0.0):\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Output in R version 3.6.2\nc(date, dttm_ct) # equal to c.Date(date, dttm_ct) \n#> [1] \"1970-01-02\" \"1979-11-10\"\nc(dttm_ct, date) # equal to c.POSIXct(date, dttm_ct)\n#> [1] \"1970-01-01 02:00:00 CET\" \"1970-01-01 01:00:01 CET\"\n```\n:::\n\n\nIn the first statement above c.Date() is executed, which incorrectly treats the underlying double of dttm_ct (3600) as days instead of seconds. Conversely, when c.POSIXct() is called on a date, one day is counted as one second only.\n\nWe can highlight these mechanics by the following code:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Output in R version 3.6.2\nunclass(c(date, dttm_ct)) # internal representation\n#> [1] 1 3600\ndate + 3599\n#> \"1979-11-10\"\n```\n:::\n\n\nAs of R 4.0.0 these issues have been resolved and both methods now convert their input first into POSIXct and Date, respectively.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nc(dttm_ct, date)\n#> [1] \"1970-01-01 01:00:00 UTC\" \"1970-01-02 00:00:00 UTC\"\nunclass(c(dttm_ct, date))\n#> [1] 3600 86400\n\nc(date, dttm_ct)\n#> [1] \"1970-01-02\" \"1970-01-01\"\nunclass(c(date, dttm_ct))\n#> [1] 1 0\n```\n:::\n\n\nHowever, as c() strips the time zone (and other attributes) of POSIXct objects, some caution is still recommended.\n\n\n::: {.cell}\n\n```{.r .cell-code}\n(dttm_ct <- as.POSIXct(\"1970-01-01 01:00\", tz = \"HST\"))\n#> [1] \"1970-01-01 01:00:00 HST\"\nattributes(c(dttm_ct))\n#> $class\n#> [1] \"POSIXct\" \"POSIXt\"\n```\n:::\n\n\nA package that deals with these kinds of problems in more depth and provides a structural solution for them is the {vctrs} package9 which is also used throughout the tidyverse.10\n\nLet’s look at unlist(), which operates on list input.\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Attributes are stripped\nunlist(list(date, dttm_ct)) \n#> [1] 1 39600\n```\n:::\n\n\nWe see again that dates and date-times are internally stored as doubles. Unfortunately, this is all we are left with, when unlist strips the attributes of the list.\n\nTo summarise: c() coerces types and strips time zones. Errors may have occurred in older R versions because of inappropriate method dispatch/immature methods. unlist() strips attributes.\n</details>\n\n\n\n## Data frames and tibbles\n\n \n\nCredit: [Advanced R](https://adv-r.hadley.nz/index.html) by Hadley Wickham\n\n### Data frame\n\nA data frame is a:\n\n- Named list of vectors (i.e., column names)\n- Attributes:\n - (column) `names`\n - `row.names`\n - Class: \"data frame\"\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Construct\ndf <- data.frame(\n col1 = c(1, 2, 3), # named atomic vector\n col2 = c(\"un\", \"deux\", \"trois\") # another named atomic vector\n # ,stringsAsFactors = FALSE # default for versions after R 4.1\n)\n\n# Inspect\ndf\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> col1 col2\n#> 1 1 un\n#> 2 2 deux\n#> 3 3 trois\n```\n\n\n:::\n\n```{.r .cell-code}\n# Deconstruct\n# - type\ntypeof(df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"list\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# - attributes\nattributes(df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $names\n#> [1] \"col1\" \"col2\"\n#> \n#> $class\n#> [1] \"data.frame\"\n#> \n#> $row.names\n#> [1] 1 2 3\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nrownames(df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"1\" \"2\" \"3\"\n```\n\n\n:::\n\n```{.r .cell-code}\ncolnames(df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"col1\" \"col2\"\n```\n\n\n:::\n\n```{.r .cell-code}\nnames(df) # Same as colnames(df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"col1\" \"col2\"\n```\n\n\n:::\n\n```{.r .cell-code}\nnrow(df) \n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 3\n```\n\n\n:::\n\n```{.r .cell-code}\nncol(df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2\n```\n\n\n:::\n\n```{.r .cell-code}\nlength(df) # Same as ncol(df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2\n```\n\n\n:::\n:::\n\n\nUnlike other lists, the length of each vector must be the same (i.e. as many vector elements as rows in the data frame).\n\n### Tibble\n\nCreated to relieve some of the frustrations and pain points created by data frames, tibbles are data frames that are:\n\n- Lazy (do less)\n- Surly (complain more)\n\n#### Lazy\n\nTibbles do not:\n\n- Coerce strings\n- Transform non-syntactic names\n- Recycle vectors of length greater than 1\n\n**Coerce strings**\n\n\n::: {.cell}\n\n```{.r .cell-code}\nchr_col <- c(\"don't\", \"factor\", \"me\", \"bro\")\n\n# data frame\ndf <- data.frame(\n a = chr_col,\n # in R 4.1 and earlier, this was the default\n stringsAsFactors = TRUE\n)\n\n# tibble\ntbl <- tibble::tibble(\n a = chr_col\n)\n\n# contrast the structure\nstr(df$a)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Factor w/ 4 levels \"bro\",\"don't\",..: 2 3 4 1\n```\n\n\n:::\n\n```{.r .cell-code}\nstr(tbl$a)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> chr [1:4] \"don't\" \"factor\" \"me\" \"bro\"\n```\n\n\n:::\n:::\n\n\n**Transform non-syntactic names**\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# data frame\ndf <- data.frame(\n `1` = c(1, 2, 3)\n)\n\n# tibble\ntbl <- tibble::tibble(\n `1` = c(1, 2, 3)\n)\n\n# contrast the names\nnames(df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"X1\"\n```\n\n\n:::\n\n```{.r .cell-code}\nnames(tbl)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"1\"\n```\n\n\n:::\n:::\n\n\n**Recycle vectors of length greater than 1**\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# data frame\ndf <- data.frame(\n col1 = c(1, 2, 3, 4),\n col2 = c(1, 2)\n)\n\n# tibble\ntbl <- tibble::tibble(\n col1 = c(1, 2, 3, 4),\n col2 = c(1, 2)\n)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in `tibble::tibble()`:\n#> ! Tibble columns must have compatible sizes.\n#> • Size 4: Existing data.\n#> • Size 2: Column `col2`.\n#> ℹ Only values of size one are recycled.\n```\n\n\n:::\n:::\n\n\n#### Surly\n\nTibbles do only what they're asked and complain if what they're asked doesn't make sense:\n\n- Subsetting always yields a tibble\n- Complains if cannot find column\n\n**Subsetting always yields a tibble**\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# data frame\ndf <- data.frame(\n col1 = c(1, 2, 3, 4)\n)\n\n# tibble\ntbl <- tibble::tibble(\n col1 = c(1, 2, 3, 4)\n)\n\n# contrast\ndf_col <- df[, \"col1\"]\nstr(df_col)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> num [1:4] 1 2 3 4\n```\n\n\n:::\n\n```{.r .cell-code}\ntbl_col <- tbl[, \"col1\"]\nstr(tbl_col)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> tibble [4 × 1] (S3: tbl_df/tbl/data.frame)\n#> $ col1: num [1:4] 1 2 3 4\n```\n\n\n:::\n\n```{.r .cell-code}\n# to select a vector, do one of these instead\ntbl_col_1 <- tbl[[\"col1\"]]\nstr(tbl_col_1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> num [1:4] 1 2 3 4\n```\n\n\n:::\n\n```{.r .cell-code}\ntbl_col_2 <- dplyr::pull(tbl, col1)\nstr(tbl_col_2)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> num [1:4] 1 2 3 4\n```\n\n\n:::\n:::\n\n\n**Complains if cannot find column**\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnames(df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"col1\"\n```\n\n\n:::\n\n```{.r .cell-code}\ndf$col\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 2 3 4\n```\n\n\n:::\n\n```{.r .cell-code}\nnames(tbl)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"col1\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntbl$col\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning: Unknown or uninitialised column: `col`.\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> NULL\n```\n\n\n:::\n:::\n\n\n#### One more difference\n\n**`tibble()` allows you to refer to variables created during construction**\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntibble::tibble(\n x = 1:3,\n y = x * 2 # x refers to the line above\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 3 × 2\n#> x y\n#> <int> <dbl>\n#> 1 1 2\n#> 2 2 4\n#> 3 3 6\n```\n\n\n:::\n:::\n\n\n<details>\n<summary>Side Quest: Row Names</summary>\n\n- character vector containing only unique values\n- get and set with `rownames()`\n- can use them to subset rows\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf3 <- data.frame(\n age = c(35, 27, 18),\n hair = c(\"blond\", \"brown\", \"black\"),\n row.names = c(\"Bob\", \"Susan\", \"Sam\")\n)\ndf3\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> age hair\n#> Bob 35 blond\n#> Susan 27 brown\n#> Sam 18 black\n```\n\n\n:::\n\n```{.r .cell-code}\nrownames(df3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"Bob\" \"Susan\" \"Sam\"\n```\n\n\n:::\n\n```{.r .cell-code}\ndf3[\"Bob\", ]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> age hair\n#> Bob 35 blond\n```\n\n\n:::\n\n```{.r .cell-code}\nrownames(df3) <- c(\"Susan\", \"Bob\", \"Sam\")\nrownames(df3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"Susan\" \"Bob\" \"Sam\"\n```\n\n\n:::\n\n```{.r .cell-code}\ndf3[\"Bob\", ]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> age hair\n#> Bob 27 brown\n```\n\n\n:::\n:::\n\n\nThere are three reasons why row names are undesirable:\n\n3. Metadata is data, so storing it in a different way to the rest of the data is fundamentally a bad idea. \n2. Row names are a poor abstraction for labelling rows because they only work when a row can be identified by a single string. This fails in many cases.\n3. Row names must be unique, so any duplication of rows (e.g. from bootstrapping) will create new row names.\n\n</details>\n\n\n### Printing\n\nData frames and tibbles print differently\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf3\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> age hair\n#> Susan 35 blond\n#> Bob 27 brown\n#> Sam 18 black\n```\n\n\n:::\n\n```{.r .cell-code}\ntibble::as_tibble(df3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 3 × 2\n#> age hair \n#> <dbl> <chr>\n#> 1 35 blond\n#> 2 27 brown\n#> 3 18 black\n```\n\n\n:::\n:::\n\n\n\n### Subsetting\n\nTwo undesirable subsetting behaviours:\n\n1. When you subset columns with `df[, vars]`, you will get a vector if vars selects one variable, otherwise you’ll get a data frame, unless you always remember to use `df[, vars, drop = FALSE]`.\n2. When you attempt to extract a single column with `df$x` and there is no column `x`, a data frame will instead select any variable that starts with `x`. If no variable starts with `x`, `df$x` will return NULL.\n\nTibbles tweak these behaviours so that a [ always returns a tibble, and a $ doesn’t do partial matching and warns if it can’t find a variable (*this is what makes tibbles surly*).\n\n### Testing\n\nWhether data frame: `is.data.frame()`. Note: both data frame and tibble are data frames.\n\nWhether tibble: `tibble::is_tibble`. Note: only tibbles are tibbles. Vanilla data frames are not.\n\n### Coercion\n\n- To data frame: `as.data.frame()`\n- To tibble: `tibble::as_tibble()`\n\n### List Columns\n\nList-columns are allowed in data frames but you have to do a little extra work by either adding the list-column after creation or wrapping the list in `I()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf4 <- data.frame(x = 1:3)\ndf4$y <- list(1:2, 1:3, 1:4)\ndf4\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x y\n#> 1 1 1, 2\n#> 2 2 1, 2, 3\n#> 3 3 1, 2, 3, 4\n```\n\n\n:::\n\n```{.r .cell-code}\ndf5 <- data.frame(\n x = 1:3, \n y = I(list(1:2, 1:3, 1:4))\n)\ndf5\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x y\n#> 1 1 1, 2\n#> 2 2 1, 2, 3\n#> 3 3 1, 2, 3, 4\n```\n\n\n:::\n:::\n\n\n### Matrix and data frame columns\n\n- As long as the number of rows matches the data frame, it’s also possible to have a matrix or data frame as a column of a data frame.\n- same as list-columns, must either addi the list-column after creation or wrapping the list in `I()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndfm <- data.frame(\n x = 1:3 * 10,\n y = I(matrix(1:9, nrow = 3))\n)\n\ndfm$z <- data.frame(a = 3:1, b = letters[1:3], stringsAsFactors = FALSE)\n\nstr(dfm)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 'data.frame':\t3 obs. of 3 variables:\n#> $ x: num 10 20 30\n#> $ y: 'AsIs' int [1:3, 1:3] 1 2 3 4 5 6 7 8 9\n#> $ z:'data.frame':\t3 obs. of 2 variables:\n#> ..$ a: int 3 2 1\n#> ..$ b: chr \"a\" \"b\" \"c\"\n```\n\n\n:::\n\n```{.r .cell-code}\ndfm$y\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [,1] [,2] [,3]\n#> [1,] 1 4 7\n#> [2,] 2 5 8\n#> [3,] 3 6 9\n```\n\n\n:::\n\n```{.r .cell-code}\ndfm$z\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a b\n#> 1 3 a\n#> 2 2 b\n#> 3 1 c\n```\n\n\n:::\n:::\n\n\n\n### Exercises\n\n1. Can you have a data frame with zero rows? What about zero columns?\n\n<details><summary>Answer(s)</summary>\nYes, you can create these data frames easily; either during creation or via subsetting. Even both dimensions can be zero. Create a 0-row, 0-column, or an empty data frame directly:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndata.frame(a = integer(), b = logical())\n#> [1] a b\n#> <0 rows> (or 0-length row.names)\n\ndata.frame(row.names = 1:3) # or data.frame()[1:3, ]\n#> data frame with 0 columns and 3 rows\n\ndata.frame()\n#> data frame with 0 columns and 0 rows\n```\n:::\n\n\nCreate similar data frames via subsetting the respective dimension with either 0, `NULL`, `FALSE` or a valid 0-length atomic (`logical(0)`, `character(0)`, `integer(0)`, `double(0)`). Negative integer sequences would also work. The following example uses a zero:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmtcars[0, ]\n#> [1] mpg cyl disp hp drat wt qsec vs am gear carb\n#> <0 rows> (or 0-length row.names)\n\nmtcars[ , 0] # or mtcars[0]\n#> data frame with 0 columns and 32 rows\n\nmtcars[0, 0]\n#> data frame with 0 columns and 0 rows\n```\n:::\n\n\n\n</details>\n\n2. What happens if you attempt to set rownames that are not unique?\n\n<details><summary>Answer(s)</summary>\nMatrices can have duplicated row names, so this does not cause problems.\n\nData frames, however, require unique rownames and you get different results depending on how you attempt to set them. If you set them directly or via `row.names()`, you get an error:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndata.frame(row.names = c(\"x\", \"y\", \"y\"))\n#> Error in data.frame(row.names = c(\"x\", \"y\", \"y\")): duplicate row.names: y\n\ndf <- data.frame(x = 1:3)\nrow.names(df) <- c(\"x\", \"y\", \"y\")\n#> Warning: non-unique value when setting 'row.names': 'y'\n#> Error in `.rowNamesDF<-`(x, value = value): duplicate 'row.names' are not allowed\n```\n:::\n\n\nIf you use subsetting, `[` automatically deduplicates:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nrow.names(df) <- c(\"x\", \"y\", \"z\")\ndf[c(1, 1, 1), , drop = FALSE]\n#> x\n#> x 1\n#> x.1 1\n#> x.2 1\n```\n:::\n\n\n</details>\n\n3. If `df` is a data frame, what can you say about `t(df)`, and `t(t(df))`? Perform some experiments, making sure to try different column types.\n\n<details><summary>Answer(s)</summary>\nBoth of `t(df)` and `t(t(df))` will return matrices:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf <- data.frame(x = 1:3, y = letters[1:3])\nis.matrix(df)\n#> [1] FALSE\nis.matrix(t(df))\n#> [1] TRUE\nis.matrix(t(t(df)))\n#> [1] TRUE\n```\n:::\n\n\nThe dimensions will respect the typical transposition rules:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndim(df)\n#> [1] 3 2\ndim(t(df))\n#> [1] 2 3\ndim(t(t(df)))\n#> [1] 3 2\n```\n:::\n\n\nBecause the output is a matrix, every column is coerced to the same type. (It is implemented within `t.data.frame()` via `as.matrix()` which is described below).\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf\n#> x y\n#> 1 1 a\n#> 2 2 b\n#> 3 3 c\nt(df)\n#> [,1] [,2] [,3]\n#> x \"1\" \"2\" \"3\" \n#> y \"a\" \"b\" \"c\"\n```\n:::\n\n\n</details>\n\n4. What does `as.matrix()` do when applied to a data frame with columns of different types? How does it differ from `data.matrix()`?\n\n<details><summary>Answer(s)</summary>\nThe type of the result of as.matrix depends on the types of the input columns (see `?as.matrix`):\n\n> The method for data frames will return a character matrix if there is only atomic columns and any non-(numeric/logical/complex) column, applying as.vector to factors and format to other non-character columns. Otherwise the usual coercion hierarchy (logical < integer < double < complex) will be used, e.g. all-logical data frames will be coerced to a logical matrix, mixed logical-integer will give an integer matrix, etc.\n\nOn the other hand, `data.matrix` will always return a numeric matrix (see `?data.matrix()`).\n\n> Return the matrix obtained by converting all the variables in a data frame to numeric mode and then binding them together as the columns of a matrix. Factors and ordered factors are replaced by their internal codes. […] Character columns are first converted to factors and then to integers.\n\nWe can illustrate and compare the mechanics of these functions using a concrete example. `as.matrix()` makes it possible to retrieve most of the original information from the data frame but leaves us with characters. To retrieve all information from `data.matrix()`’s output, we would need a lookup table for each column.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf_coltypes <- data.frame(\n a = c(\"a\", \"b\"),\n b = c(TRUE, FALSE),\n c = c(1L, 0L),\n d = c(1.5, 2),\n e = factor(c(\"f1\", \"f2\"))\n)\n\nas.matrix(df_coltypes)\n#> a b c d e \n#> [1,] \"a\" \"TRUE\" \"1\" \"1.5\" \"f1\"\n#> [2,] \"b\" \"FALSE\" \"0\" \"2.0\" \"f2\"\ndata.matrix(df_coltypes)\n#> a b c d e\n#> [1,] 1 1 1 1.5 1\n#> [2,] 2 0 0 2.0 2\n```\n:::\n\n\n</details>\n\n\n\n\n\n\n\n## `NULL`\n\nSpecial type of object that:\n\n- Length 0\n- Cannot have attributes\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntypeof(NULL)\n#> [1] \"NULL\"\n\nlength(NULL)\n#> [1] 0\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- NULL\nattr(x, \"y\") <- 1\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in attr(x, \"y\") <- 1: attempt to set an attribute on NULL\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nis.null(NULL)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n\n## Digestif\n\nLet is use some of this chapter's skills on the `penguins` data.\n\n### Attributes\n\n\n::: {.cell}\n\n```{.r .cell-code}\nstr(penguins_raw)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> tibble [344 × 17] (S3: tbl_df/tbl/data.frame)\n#> $ studyName : chr [1:344] \"PAL0708\" \"PAL0708\" \"PAL0708\" \"PAL0708\" ...\n#> $ Sample Number : num [1:344] 1 2 3 4 5 6 7 8 9 10 ...\n#> $ Species : chr [1:344] \"Adelie Penguin (Pygoscelis adeliae)\" \"Adelie Penguin (Pygoscelis adeliae)\" \"Adelie Penguin (Pygoscelis adeliae)\" \"Adelie Penguin (Pygoscelis adeliae)\" ...\n#> $ Region : chr [1:344] \"Anvers\" \"Anvers\" \"Anvers\" \"Anvers\" ...\n#> $ Island : chr [1:344] \"Torgersen\" \"Torgersen\" \"Torgersen\" \"Torgersen\" ...\n#> $ Stage : chr [1:344] \"Adult, 1 Egg Stage\" \"Adult, 1 Egg Stage\" \"Adult, 1 Egg Stage\" \"Adult, 1 Egg Stage\" ...\n#> $ Individual ID : chr [1:344] \"N1A1\" \"N1A2\" \"N2A1\" \"N2A2\" ...\n#> $ Clutch Completion : chr [1:344] \"Yes\" \"Yes\" \"Yes\" \"Yes\" ...\n#> $ Date Egg : Date[1:344], format: \"2007-11-11\" \"2007-11-11\" ...\n#> $ Culmen Length (mm) : num [1:344] 39.1 39.5 40.3 NA 36.7 39.3 38.9 39.2 34.1 42 ...\n#> $ Culmen Depth (mm) : num [1:344] 18.7 17.4 18 NA 19.3 20.6 17.8 19.6 18.1 20.2 ...\n#> $ Flipper Length (mm): num [1:344] 181 186 195 NA 193 190 181 195 193 190 ...\n#> $ Body Mass (g) : num [1:344] 3750 3800 3250 NA 3450 ...\n#> $ Sex : chr [1:344] \"MALE\" \"FEMALE\" \"FEMALE\" NA ...\n#> $ Delta 15 N (o/oo) : num [1:344] NA 8.95 8.37 NA 8.77 ...\n#> $ Delta 13 C (o/oo) : num [1:344] NA -24.7 -25.3 NA -25.3 ...\n#> $ Comments : chr [1:344] \"Not enough blood for isotopes.\" NA NA \"Adult not sampled.\" ...\n#> - attr(*, \"spec\")=List of 3\n#> ..$ cols :List of 17\n#> .. ..$ studyName : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_character\" \"collector\"\n#> .. ..$ Sample Number : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_double\" \"collector\"\n#> .. ..$ Species : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_character\" \"collector\"\n#> .. ..$ Region : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_character\" \"collector\"\n#> .. ..$ Island : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_character\" \"collector\"\n#> .. ..$ Stage : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_character\" \"collector\"\n#> .. ..$ Individual ID : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_character\" \"collector\"\n#> .. ..$ Clutch Completion : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_character\" \"collector\"\n#> .. ..$ Date Egg :List of 1\n#> .. .. ..$ format: chr \"\"\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_date\" \"collector\"\n#> .. ..$ Culmen Length (mm) : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_double\" \"collector\"\n#> .. ..$ Culmen Depth (mm) : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_double\" \"collector\"\n#> .. ..$ Flipper Length (mm): list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_double\" \"collector\"\n#> .. ..$ Body Mass (g) : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_double\" \"collector\"\n#> .. ..$ Sex : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_character\" \"collector\"\n#> .. ..$ Delta 15 N (o/oo) : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_double\" \"collector\"\n#> .. ..$ Delta 13 C (o/oo) : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_double\" \"collector\"\n#> .. ..$ Comments : list()\n#> .. .. ..- attr(*, \"class\")= chr [1:2] \"collector_character\" \"collector\"\n#> ..$ default: list()\n#> .. ..- attr(*, \"class\")= chr [1:2] \"collector_guess\" \"collector\"\n#> ..$ skip : num 1\n#> ..- attr(*, \"class\")= chr \"col_spec\"\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nstr(penguins_raw, give.attr = FALSE)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> tibble [344 × 17] (S3: tbl_df/tbl/data.frame)\n#> $ studyName : chr [1:344] \"PAL0708\" \"PAL0708\" \"PAL0708\" \"PAL0708\" ...\n#> $ Sample Number : num [1:344] 1 2 3 4 5 6 7 8 9 10 ...\n#> $ Species : chr [1:344] \"Adelie Penguin (Pygoscelis adeliae)\" \"Adelie Penguin (Pygoscelis adeliae)\" \"Adelie Penguin (Pygoscelis adeliae)\" \"Adelie Penguin (Pygoscelis adeliae)\" ...\n#> $ Region : chr [1:344] \"Anvers\" \"Anvers\" \"Anvers\" \"Anvers\" ...\n#> $ Island : chr [1:344] \"Torgersen\" \"Torgersen\" \"Torgersen\" \"Torgersen\" ...\n#> $ Stage : chr [1:344] \"Adult, 1 Egg Stage\" \"Adult, 1 Egg Stage\" \"Adult, 1 Egg Stage\" \"Adult, 1 Egg Stage\" ...\n#> $ Individual ID : chr [1:344] \"N1A1\" \"N1A2\" \"N2A1\" \"N2A2\" ...\n#> $ Clutch Completion : chr [1:344] \"Yes\" \"Yes\" \"Yes\" \"Yes\" ...\n#> $ Date Egg : Date[1:344], format: \"2007-11-11\" \"2007-11-11\" ...\n#> $ Culmen Length (mm) : num [1:344] 39.1 39.5 40.3 NA 36.7 39.3 38.9 39.2 34.1 42 ...\n#> $ Culmen Depth (mm) : num [1:344] 18.7 17.4 18 NA 19.3 20.6 17.8 19.6 18.1 20.2 ...\n#> $ Flipper Length (mm): num [1:344] 181 186 195 NA 193 190 181 195 193 190 ...\n#> $ Body Mass (g) : num [1:344] 3750 3800 3250 NA 3450 ...\n#> $ Sex : chr [1:344] \"MALE\" \"FEMALE\" \"FEMALE\" NA ...\n#> $ Delta 15 N (o/oo) : num [1:344] NA 8.95 8.37 NA 8.77 ...\n#> $ Delta 13 C (o/oo) : num [1:344] NA -24.7 -25.3 NA -25.3 ...\n#> $ Comments : chr [1:344] \"Not enough blood for isotopes.\" NA NA \"Adult not sampled.\" ...\n```\n\n\n:::\n:::\n\n\n### Data Frames vs Tibbles\n\n\n::: {.cell}\n\n```{.r .cell-code}\npenguins_df <- data.frame(penguins)\npenguins_tb <- penguins #i.e. penguins was already a tibble\n```\n:::\n\n\n#### Printing\n\n* Tip: print out these results in RStudio under different editor themes\n\n\n::: {.cell}\n\n```{.r .cell-code}\nprint(penguins_df) #don't run this\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nhead(penguins_df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> species island bill_length_mm bill_depth_mm flipper_length_mm body_mass_g\n#> 1 Adelie Torgersen 39.1 18.7 181 3750\n#> 2 Adelie Torgersen 39.5 17.4 186 3800\n#> 3 Adelie Torgersen 40.3 18.0 195 3250\n#> 4 Adelie Torgersen NA NA NA NA\n#> 5 Adelie Torgersen 36.7 19.3 193 3450\n#> 6 Adelie Torgersen 39.3 20.6 190 3650\n#> sex year\n#> 1 male 2007\n#> 2 female 2007\n#> 3 female 2007\n#> 4 <NA> 2007\n#> 5 female 2007\n#> 6 male 2007\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\npenguins_tb\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 344 × 8\n#> species island bill_length_mm bill_depth_mm flipper_length_mm body_mass_g\n#> <fct> <fct> <dbl> <dbl> <int> <int>\n#> 1 Adelie Torgersen 39.1 18.7 181 3750\n#> 2 Adelie Torgersen 39.5 17.4 186 3800\n#> 3 Adelie Torgersen 40.3 18 195 3250\n#> 4 Adelie Torgersen NA NA NA NA\n#> 5 Adelie Torgersen 36.7 19.3 193 3450\n#> 6 Adelie Torgersen 39.3 20.6 190 3650\n#> 7 Adelie Torgersen 38.9 17.8 181 3625\n#> 8 Adelie Torgersen 39.2 19.6 195 4675\n#> 9 Adelie Torgersen 34.1 18.1 193 3475\n#> 10 Adelie Torgersen 42 20.2 190 4250\n#> # ℹ 334 more rows\n#> # ℹ 2 more variables: sex <fct>, year <int>\n```\n\n\n:::\n:::\n\n\n### Atomic Vectors\n\n\n::: {.cell}\n\n```{.r .cell-code}\nspecies_vector_df <- penguins_df |> select(species)\nspecies_unlist_df <- penguins_df |> select(species) |> unlist()\nspecies_pull_df <- penguins_df |> select(species) |> pull()\n\nspecies_vector_tb <- penguins_tb |> select(species)\nspecies_unlist_tb <- penguins_tb |> select(species) |> unlist()\nspecies_pull_tb <- penguins_tb |> select(species) |> pull()\n```\n:::\n\n\n<details>\n<summary>`typeof()` and `class()`</summary>\n\n::: {.cell}\n\n```{.r .cell-code}\ntypeof(species_vector_df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"list\"\n```\n\n\n:::\n\n```{.r .cell-code}\nclass(species_vector_df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"data.frame\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(species_unlist_df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"integer\"\n```\n\n\n:::\n\n```{.r .cell-code}\nclass(species_unlist_df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"factor\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(species_pull_df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"integer\"\n```\n\n\n:::\n\n```{.r .cell-code}\nclass(species_pull_df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"factor\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(species_vector_tb)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"list\"\n```\n\n\n:::\n\n```{.r .cell-code}\nclass(species_vector_tb)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"tbl_df\" \"tbl\" \"data.frame\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(species_unlist_tb)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"integer\"\n```\n\n\n:::\n\n```{.r .cell-code}\nclass(species_unlist_tb)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"factor\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(species_pull_tb)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"integer\"\n```\n\n\n:::\n\n```{.r .cell-code}\nclass(species_pull_tb)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"factor\"\n```\n\n\n:::\n:::\n\n</details>\n\n### Column Names\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncolnames(penguins_tb)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"species\" \"island\" \"bill_length_mm\" \n#> [4] \"bill_depth_mm\" \"flipper_length_mm\" \"body_mass_g\" \n#> [7] \"sex\" \"year\"\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnames(penguins_tb) == colnames(penguins_tb)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnames(penguins_df) == names(penguins_tb)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE\n```\n\n\n:::\n:::\n\n\n* What if we only invoke a partial name of a column of a tibble?\n\n\n::: {.cell}\n\n```{.r .cell-code}\npenguins_tb$y \n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning: Unknown or uninitialised column: `y`.\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> NULL\n```\n\n\n:::\n:::\n\n\n\n\n* What if we only invoke a partial name of a column of a data frame?\n\n\n::: {.cell}\n\n```{.r .cell-code}\nhead(penguins_df$y) #instead of `year`\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2007 2007 2007 2007 2007 2007\n```\n\n\n:::\n:::\n\n\n* Is this evaluation in alphabetical order or column order?\n\n\n::: {.cell}\n\n```{.r .cell-code}\npenguins_df_se_sp <- penguins_df |> select(sex, species)\npenguins_df_sp_se <- penguins_df |> select(species, sex)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nhead(penguins_df_se_sp$s)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> NULL\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nhead(penguins_df_sp_se$s)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> NULL\n```\n\n\n:::\n:::\n\n\n\n## Chapter Quiz\n\n1. What are the four common types of atomic vectors? What are the two rare types?\n\n<details><summary>Answer(s)</summary>\nThe four common types of atomic vector are logical, integer, double and character. The two rarer types are complex and raw.\n</details>\n\n2. What are attributes? How do you get them and set them?\n\n<details><summary>Answer(s)</summary>\nAttributes allow you to associate arbitrary additional metadata to any object. You can get and set individual attributes with `attr(x, \"y\")` and `attr(x, \"y\") <- value`; or you can get and set all attributes at once with `attributes()`.\n</details>\n\n3. How is a list different from an atomic vector? How is a matrix different from a data frame?\n\n<details><summary>Answer(s)</summary>\nThe elements of a list can be any type (even a list); the elements of an atomic vector are all of the same type. Similarly, every element of a matrix must be the same type; in a data frame, different columns can have different types.\n</details>\n\n4. Can you have a list that is a matrix? Can a data frame have a column that is a matrix?\n\n<details><summary>Answer(s)</summary>\nYou can make a list-array by assigning dimensions to a list. You can make a matrix a column of a data frame with `df$x <- matrix()`, or by using `I()` when creating a new data frame `data.frame(x = I(matrix()))`.\n</details>\n\n5. How do tibbles behave differently from data frames?\n\n<details><summary>Answer(s)</summary>\nTibbles have an enhanced print method, never coerce strings to factors, and provide stricter subsetting methods.\n</details>\n\n\n\n\n\n\n\n\n\n\n\n\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/pQ-xDAPEQaw\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/CpLM6SdpTFY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/9E4RlbW8vxU\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/LCAgxwm5Ydg\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/DrVY6DE9ymY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/mmcnkIjANps\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary>Meeting chat log</summary>\n\n```\n00:10:18\tOluwafemi Oyedele:\tHi, good evening\n00:23:31\tFederica Gazzelloni:\tHi Kiante!\n00:24:21\tFederica Gazzelloni:\tThanks Arthur\n00:25:46\tTrevin:\tWelcome Matt!\n00:26:02\tMatt Dupree:\thello! thank you!\n00:30:34\tFederica Gazzelloni:\tHello Matt!\n00:30:46\tMatt Dupree:\thello!\n00:38:24\tRyan Metcalf:\t`rlang::cpl()` = “complex”. For example `0+1i`\n00:55:37\tTrevin:\t> two <- c(1,2,3)\n> names(two) <- c(\"one\", \"two\")\n> two\n one two <NA> \n 1 2 3\n00:57:25\tRyan Metcalf:\tExcellent Trevin. You beat me to the output! Assuming we didn't supply the string, `NA` is entered instead.\n01:08:50\tRyan Metcalf:\tWithout further research, this is the \"Unix Epoch”. However, varying operating systems use different Epochs.\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/QcdByYHo1ms\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:54:07\tRon:\thttps://www.tidyverse.org/blog/2021/03/clock-0-1-0/\n01:14:39\tRobert Hilly:\thttps://www.amazon.com/Effective-Pandas-Patterns-Manipulation-Treading/dp/B09MYXXSFM\n```\n</details>\n",
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+ "engine": "knitr",
+ "markdown": "---\nengine: knitr\ntitle: Subsetting\n---\n\n## Learning objectives:\n\n- Learn about the 6 ways to subset atomic vectors\n- Learn about the 3 subsetting operators: `[[`, `[`, and `$`\n- Learn how subsetting works with different vector types\n- Learn how subsetting can be combined with assignment\n\n## Selecting multiple elements\n\n### Atomic Vectors\n\n- 6 ways to subset atomic vectors\n\nLet's take a look with an example vector.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- c(1.1, 2.2, 3.3, 4.4)\n```\n:::\n\n\n**Positive integer indices**\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# return elements at specified positions which can be out of order\nx[c(4, 1)]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 4.4 1.1\n```\n\n\n:::\n\n```{.r .cell-code}\n# duplicate indices return duplicate values\nx[c(2, 2)]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2.2 2.2\n```\n\n\n:::\n\n```{.r .cell-code}\n# real numbers truncate to integers\n# so this behaves as if it is x[c(3, 3)]\nx[c(3.2, 3.8)]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 3.3 3.3\n```\n\n\n:::\n:::\n\n\n**Negative integer indices**\n\n\n::: {.cell}\n\n```{.r .cell-code}\n### excludes elements at specified positions\nx[-c(1, 3)] # same as x[c(-1, -3)] or x[c(2, 4)]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2.2 4.4\n```\n\n\n:::\n\n```{.r .cell-code}\n### mixing positive and negative is a no-no\nx[c(-1, 3)]\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in x[c(-1, 3)]: only 0's may be mixed with negative subscripts\n```\n\n\n:::\n:::\n\n\n**Logical Vectors**\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx[c(TRUE, TRUE, FALSE, TRUE)]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1.1 2.2 4.4\n```\n\n\n:::\n\n```{.r .cell-code}\nx[x < 3]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1.1 2.2\n```\n\n\n:::\n\n```{.r .cell-code}\ncond <- x > 2.5\nx[cond]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 3.3 4.4\n```\n\n\n:::\n:::\n\n\n- **Recyling rules** applies when the two vectors are of different lengths\n- the shorter of the two is recycled to the length of the longer\n- Easy to understand if x or y is 1, best to avoid other lengths\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx[c(F, T)] # equivalent to: x[c(FALSE, TRUE, FALSE, TRUE)]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2.2 4.4\n```\n\n\n:::\n:::\n\n\n**Missing values (NA)**\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Missing values in index will also return NA in output\nx[c(NA, TRUE)]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] NA 2.2 NA 4.4\n```\n\n\n:::\n:::\n\n\n**Nothing**\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# returns the original vector\nx[]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1.1 2.2 3.3 4.4\n```\n\n\n:::\n:::\n\n\n**Zero**\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# returns a zero-length vector\nx[0]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> numeric(0)\n```\n\n\n:::\n:::\n\n\n**Character vectors**\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# if name, you can use to return matched elements\n(y <- setNames(x, letters[1:4]))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a b c d \n#> 1.1 2.2 3.3 4.4\n```\n\n\n:::\n\n```{.r .cell-code}\ny[c(\"d\", \"b\", \"a\")]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> d b a \n#> 4.4 2.2 1.1\n```\n\n\n:::\n\n```{.r .cell-code}\n# Like integer indices, you can repeat indices\ny[c(\"a\", \"a\", \"a\")]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a a a \n#> 1.1 1.1 1.1\n```\n\n\n:::\n\n```{.r .cell-code}\n# When subsetting with [, names are always matched exactly\nz <- c(abc = 1, def = 2)\nz\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> abc def \n#> 1 2\n```\n\n\n:::\n\n```{.r .cell-code}\nz[c(\"a\", \"d\")]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <NA> <NA> \n#> NA NA\n```\n\n\n:::\n:::\n\n\n### Lists\n\n- Subsetting works the same way\n- `[` always returns a list\n- `[[` and `$` let you pull elements out of a list\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmy_list <- list(a = c(T, F), b = letters[5:15], c = 100:108)\nmy_list\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $a\n#> [1] TRUE FALSE\n#> \n#> $b\n#> [1] \"e\" \"f\" \"g\" \"h\" \"i\" \"j\" \"k\" \"l\" \"m\" \"n\" \"o\"\n#> \n#> $c\n#> [1] 100 101 102 103 104 105 106 107 108\n```\n\n\n:::\n:::\n\n\n**Return a (named) list**\n\n\n::: {.cell}\n\n```{.r .cell-code}\nl1 <- my_list[2]\nl1\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $b\n#> [1] \"e\" \"f\" \"g\" \"h\" \"i\" \"j\" \"k\" \"l\" \"m\" \"n\" \"o\"\n```\n\n\n:::\n:::\n\n\n**Return a vector**\n\n\n::: {.cell}\n\n```{.r .cell-code}\nl2 <- my_list[[2]]\nl2\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"e\" \"f\" \"g\" \"h\" \"i\" \"j\" \"k\" \"l\" \"m\" \"n\" \"o\"\n```\n\n\n:::\n\n```{.r .cell-code}\nl2b <- my_list$b\nl2b\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"e\" \"f\" \"g\" \"h\" \"i\" \"j\" \"k\" \"l\" \"m\" \"n\" \"o\"\n```\n\n\n:::\n:::\n\n\n**Return a specific element**\n\n\n::: {.cell}\n\n```{.r .cell-code}\nl3 <- my_list[[2]][3]\nl3\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"g\"\n```\n\n\n:::\n\n```{.r .cell-code}\nl4 <- my_list[['b']][3]\nl4\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"g\"\n```\n\n\n:::\n\n```{.r .cell-code}\nl4b <- my_list$b[3]\nl4b\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"g\"\n```\n\n\n:::\n:::\n\n\n**Visual Representation**\n\n \n\nSee this stackoverflow article for more detailed information about the differences: https://stackoverflow.com/questions/1169456/the-difference-between-bracket-and-double-bracket-for-accessing-the-el\n\n### Matrices and arrays\n\nYou can subset higher dimensional structures in three ways:\n\n- with multiple vectors\n- with a single vector\n- with a matrix\n\n\n::: {.cell}\n\n```{.r .cell-code}\na <- matrix(1:12, nrow = 3)\ncolnames(a) <- c(\"A\", \"B\", \"C\", \"D\")\n\n# single row\na[1, ]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> A B C D \n#> 1 4 7 10\n```\n\n\n:::\n\n```{.r .cell-code}\n# single column\na[, 1]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 2 3\n```\n\n\n:::\n\n```{.r .cell-code}\n# single element\na[1, 1]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> A \n#> 1\n```\n\n\n:::\n\n```{.r .cell-code}\n# two rows from two columns\na[1:2, 3:4]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> C D\n#> [1,] 7 10\n#> [2,] 8 11\n```\n\n\n:::\n\n```{.r .cell-code}\na[c(TRUE, FALSE, TRUE), c(\"B\", \"A\")]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> B A\n#> [1,] 4 1\n#> [2,] 6 3\n```\n\n\n:::\n\n```{.r .cell-code}\n# zero index and negative index\na[0, -2]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> A C D\n```\n\n\n:::\n:::\n\n\n**Subset a matrix with a matrix**\n\n\n::: {.cell}\n\n```{.r .cell-code}\nb <- matrix(1:4, nrow = 2)\nb\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [,1] [,2]\n#> [1,] 1 3\n#> [2,] 2 4\n```\n\n\n:::\n\n```{.r .cell-code}\na[b]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 7 11\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvals <- outer(1:5, 1:5, FUN = \"paste\", sep = \",\")\nvals\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [,1] [,2] [,3] [,4] [,5] \n#> [1,] \"1,1\" \"1,2\" \"1,3\" \"1,4\" \"1,5\"\n#> [2,] \"2,1\" \"2,2\" \"2,3\" \"2,4\" \"2,5\"\n#> [3,] \"3,1\" \"3,2\" \"3,3\" \"3,4\" \"3,5\"\n#> [4,] \"4,1\" \"4,2\" \"4,3\" \"4,4\" \"4,5\"\n#> [5,] \"5,1\" \"5,2\" \"5,3\" \"5,4\" \"5,5\"\n```\n\n\n:::\n\n```{.r .cell-code}\nselect <- matrix(ncol = 2, byrow = TRUE, \n c(1, 1,\n 3, 1,\n 2, 4))\nselect\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [,1] [,2]\n#> [1,] 1 1\n#> [2,] 3 1\n#> [3,] 2 4\n```\n\n\n:::\n\n```{.r .cell-code}\nvals[select]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"1,1\" \"3,1\" \"2,4\"\n```\n\n\n:::\n:::\n\n\nMatrices and arrays are just special vectors; can subset with a single vector\n(arrays in R stored column wise)\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvals[c(3, 15, 16, 17)]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"3,1\" \"5,3\" \"1,4\" \"2,4\"\n```\n\n\n:::\n:::\n\n\n### Data frames and tibbles\n\nData frames act like both lists and matrices\n\n- When subsetting with a single index, they behave like lists and index the columns, so `df[1:2]` selects the first two columns.\n- When subsetting with two indices, they behave like matrices, so `df[1:3, ]` selects the first three rows (and all the columns).\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(palmerpenguins)\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> \n#> Attaching package: 'palmerpenguins'\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> The following objects are masked from 'package:datasets':\n#> \n#> penguins, penguins_raw\n```\n\n\n:::\n\n```{.r .cell-code}\npenguins <- penguins\n\n# single index selects first two columns\ntwo_cols <- penguins[2:3] # or penguins[c(2,3)]\nhead(two_cols)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 6 × 2\n#> island bill_length_mm\n#> <fct> <dbl>\n#> 1 Torgersen 39.1\n#> 2 Torgersen 39.5\n#> 3 Torgersen 40.3\n#> 4 Torgersen NA \n#> 5 Torgersen 36.7\n#> 6 Torgersen 39.3\n```\n\n\n:::\n\n```{.r .cell-code}\n# equivalent to the above code\nsame_two_cols <- penguins[c(\"island\", \"bill_length_mm\")]\nhead(same_two_cols)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 6 × 2\n#> island bill_length_mm\n#> <fct> <dbl>\n#> 1 Torgersen 39.1\n#> 2 Torgersen 39.5\n#> 3 Torgersen 40.3\n#> 4 Torgersen NA \n#> 5 Torgersen 36.7\n#> 6 Torgersen 39.3\n```\n\n\n:::\n\n```{.r .cell-code}\n# two indices separated by comma (first two rows of 3rd and 4th columns)\npenguins[1:2, 3:4]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 2\n#> bill_length_mm bill_depth_mm\n#> <dbl> <dbl>\n#> 1 39.1 18.7\n#> 2 39.5 17.4\n```\n\n\n:::\n\n```{.r .cell-code}\n# Can't do this...\npenguins[[3:4]][c(1:4)]\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error:\n#> ! The `j` argument of `[[.tbl_df()` can't be a vector of length 2 as of\n#> tibble 3.0.0.\n#> ℹ Recursive subsetting is deprecated for tibbles.\n```\n\n\n:::\n\n```{.r .cell-code}\n# ...but this works...\npenguins[[3]][c(1:4)]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 39.1 39.5 40.3 NA\n```\n\n\n:::\n\n```{.r .cell-code}\n# ...or this equivalent...\npenguins$bill_length_mm[1:4]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 39.1 39.5 40.3 NA\n```\n\n\n:::\n:::\n\n\nSubsetting a tibble with `[` always returns a tibble\n\n### Preserving dimensionality\n\n- Data frames and tibbles behave differently\n- tibble will default to preserve dimensionality, data frames do not\n- this can lead to unexpected behavior and code breaking in the future\n- Use `drop = FALSE` to preserve dimensionality when subsetting a data frame or use tibbles\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntb <- tibble::tibble(a = 1:2, b = 1:2)\n\n# returns tibble\nstr(tb[, \"a\"])\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> tibble [2 × 1] (S3: tbl_df/tbl/data.frame)\n#> $ a: int [1:2] 1 2\n```\n\n\n:::\n\n```{.r .cell-code}\ntb[, \"a\"] # equivalent to tb[, \"a\", drop = FALSE]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 1\n#> a\n#> <int>\n#> 1 1\n#> 2 2\n```\n\n\n:::\n\n```{.r .cell-code}\n# returns integer vector\n# str(tb[, \"a\", drop = TRUE])\ntb[, \"a\", drop = TRUE]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 2\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf <- data.frame(a = 1:2, b = 1:2)\n\n# returns integer vector\n# str(df[, \"a\"])\ndf[, \"a\"]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 2\n```\n\n\n:::\n\n```{.r .cell-code}\n# returns data frame with one column\n# str(df[, \"a\", drop = FALSE])\ndf[, \"a\", drop = FALSE]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a\n#> 1 1\n#> 2 2\n```\n\n\n:::\n:::\n\n**Factors**\n\nFactor subsetting drop argument controls whether or not levels (rather than dimensions) are preserved.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nz <- factor(c(\"a\", \"b\", \"c\"))\nz[1]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] a\n#> Levels: a b c\n```\n\n\n:::\n\n```{.r .cell-code}\nz[1, drop = TRUE]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] a\n#> Levels: a\n```\n\n\n:::\n:::\n\n\n## Selecting a single element\n\n`[[` and `$` are used to extract single elements (note: a vector can be a single element)\n\n### `[[]]`\n\nBecause `[[]]` can return only a single item, you must use it with either a single positive integer or a single string. \n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- list(1:3, \"a\", 4:6)\nx[[1]]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 2 3\n```\n\n\n:::\n:::\n\n\nHadley Wickham recommends using `[[]]` with atomic vectors whenever you want to extract a single value to reinforce the expectation that you are getting and setting individual values. \n\n### `$`\n\n- `x$y` is equivalent to `x[[\"y\"]]`\n\nthe `$` operator doesn't work with stored vals\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvar <- \"cyl\"\n\n# Doesn't work - mtcars$var translated to mtcars[[\"var\"]]\nmtcars$var\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> NULL\n```\n\n\n:::\n\n```{.r .cell-code}\n# Instead use [[\nmtcars[[var]]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 6 6 4 6 8 6 8 4 4 6 6 8 8 8 8 8 8 4 4 4 4 8 8 8 8 4 4 4 8 6 8 4\n```\n\n\n:::\n:::\n\n\n`$` allows partial matching, `[[]]` does not\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- list(abc = 1)\nx$a\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1\n```\n\n\n:::\n\n```{.r .cell-code}\nx[[\"a\"]]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> NULL\n```\n\n\n:::\n:::\n\n\nHadley advises to change Global settings:\n\n\n::: {.cell}\n\n```{.r .cell-code}\noptions(warnPartialMatchDollar = TRUE)\nx$a\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning in x$a: partial match of 'a' to 'abc'\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1\n```\n\n\n:::\n:::\n\n\ntibbles don't have this behavior\n\n\n::: {.cell}\n\n```{.r .cell-code}\npenguins$s\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning: Unknown or uninitialised column: `s`.\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> NULL\n```\n\n\n:::\n:::\n\n\n### missing and out of bound indices\n\n- Due to the inconsistency of how R handles such indices, `purrr::pluck()` and `purrr::chuck()` are recommended\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- list(\n a = list(1, 2, 3),\n b = list(3, 4, 5)\n)\npurrr::pluck(x, \"a\", 1)\n# [1] 1\npurrr::pluck(x, \"c\", 1)\n# NULL\npurrr::pluck(x, \"c\", 1, .default = NA)\n# [1] NA\n```\n:::\n\n\n### `@` and `slot()`\n- `@` is `$` for S4 objects (to be revisited in Chapter 15)\n\n- `slot()` is `[[ ]]` for S4 objects\n\n## Subsetting and Assignment\n\n- Subsetting can be combined with assignment to edit values\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- c(\"Tigers\", \"Royals\", \"White Sox\", \"Twins\", \"Indians\")\n\nx[5] <- \"Guardians\"\n\nx\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"Tigers\" \"Royals\" \"White Sox\" \"Twins\" \"Guardians\"\n```\n\n\n:::\n:::\n\n\n- length of the subset and assignment vector should be the same to avoid recycling\n\nYou can use NULL to remove a component\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- list(a = 1, b = 2)\nx[[\"b\"]] <- NULL\nstr(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> List of 1\n#> $ a: num 1\n```\n\n\n:::\n:::\n\n\nSubsetting with nothing can preserve structure of original object\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# mtcars[] <- lapply(mtcars, as.integer)\n# is.data.frame(mtcars)\n# [1] TRUE\n# mtcars <- lapply(mtcars, as.integer)\n#> is.data.frame(mtcars)\n# [1] FALSE\n```\n:::\n\n\n## Applications\n\nApplications copied from cohort 2 slide\n\n### Lookup tables (character subsetting)\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- c(\"m\", \"f\", \"u\", \"f\", \"f\", \"m\", \"m\")\nlookup <- c(m = \"Male\", f = \"Female\", u = NA)\nlookup[x]\n# m f u f f m m \n# \"Male\" \"Female\" NA \"Female\" \"Female\" \"Male\" \"Male\"\n```\n:::\n\n\n### Matching and merging by hand (integer subsetting)\n\n- The `match()` function allows merging a vector with a table\n\n\n::: {.cell}\n\n```{.r .cell-code}\ngrades <- c(\"D\", \"A\", \"C\", \"B\", \"F\")\ninfo <- data.frame(\n grade = c(\"A\", \"B\", \"C\", \"D\", \"F\"),\n desc = c(\"Excellent\", \"Very Good\", \"Average\", \"Fair\", \"Poor\"),\n fail = c(F, F, F, F, T)\n)\nid <- match(grades, info$grade)\nid\n# [1] 3 2 2 1 3\ninfo[id, ]\n# grade desc fail\n# 4 D Fair FALSE\n# 1 A Excellent FALSE\n# 3 C Average FALSE\n# 2 B Very Good FALSE\n# 5 F Poor TRUE\n```\n:::\n\n\n### Random samples and bootstrapping (integer subsetting)\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# mtcars[sample(nrow(mtcars), 3), ] # use replace = TRUE to replace\n# mpg cyl disp hp drat wt qsec vs am gear carb\n# Lotus Europa 30.4 4 95.1 113 3.77 1.513 16.90 1 1 5 2\n# Mazda RX4 21.0 6 160.0 110 3.90 2.620 16.46 0 1 4 4\n# Cadillac Fleetwood 10.4 8 472.0 205 2.93 5.250 17.98 0 0 3 4\n```\n:::\n\n\n### Ordering (integer subsetting)\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# mtcars[order(mtcars$mpg), ]\n# mpg cyl disp hp drat wt qsec vs am gear carb\n# Cadillac Fleetwood 10.4 8 472.0 205 2.93 5.250 17.98 0 0 3 4\n# Lincoln Continental 10.4 8 460.0 215 3.00 5.424 17.82 0 0 3 4\n# Camaro Z28 13.3 8 350.0 245 3.73 3.840 15.41 0 0 3 4\n# Duster 360 14.3 8 360.0 245 3.21 3.570 15.84 0 0 3 4\n# Chrysler Imperial 14.7 8 440.0 230 3.23 5.345 17.42 0 0 3 4\n# Maserati Bora 15.0 8 301.0 335 3.54 3.570 14.60 0 1 5 8\n# ...\n```\n:::\n\n\n### Expanding aggregated counts (integer subsetting)\n\n- We can expand a count column by using `rep()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf <- tibble::tibble(x = c(\"Amy\", \"Julie\", \"Brian\"), n = c(2, 1, 3))\ndf[rep(1:nrow(df), df$n), ]\n# A tibble: 6 x 2\n# x n\n# <chr> <dbl>\n# 1 Amy 2\n# 2 Amy 2\n# 3 Julie 1\n# 4 Brian 3\n# 5 Brian 3\n# 6 Brian 3\n```\n:::\n\n\n### Removing columns from data frames (character)\n\n- We can remove a column by subsetting, which does not change the object\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf[, 1]\n# A tibble: 3 x 1\n# x \n# <chr>\n# 1 Amy \n# 2 Julie\n# 3 Brian\n```\n:::\n\n\n- We can also delete the column using `NULL`\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf$n <- NULL\ndf\n# A tibble: 3 x 1\n# x \n# <chr>\n# 1 Amy \n# 2 Julie\n# 3 Brian\n```\n:::\n\n\n### Selecting rows based on a condition (logical subsetting)\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# mtcars[mtcars$gear == 5, ]\n# mpg cyl disp hp drat wt qsec vs am gear carb\n# Porsche 914-2 26.0 4 120.3 91 4.43 2.140 16.7 0 1 5 2\n# Lotus Europa 30.4 4 95.1 113 3.77 1.513 16.9 1 1 5 2\n# Ford Pantera L 15.8 8 351.0 264 4.22 3.170 14.5 0 1 5 4\n# Ferrari Dino 19.7 6 145.0 175 3.62 2.770 15.5 0 1 5 6\n# Maserati Bora 15.0 8 301.0 335 3.54 3.570 14.6 0 1 5 8\n```\n:::\n\n\n### Boolean algebra versus sets (logical and integer)\n\n- `which()` gives the indices of a Boolean vector\n\n\n::: {.cell}\n\n```{.r .cell-code}\n(x1 <- 1:10 %% 2 == 0) # 1-10 divisible by 2\n# [1] FALSE TRUE FALSE TRUE FALSE TRUE FALSE TRUE FALSE TRUE\n(x2 <- which(x1))\n# [1] 2 4 6 8 10\n(y1 <- 1:10 %% 5 == 0) # 1-10 divisible by 5\n# [1] FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE TRUE\n(y2 <- which(y1))\n# [1] 5 10\nx1 & y1\n# [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE\n```\n:::\n\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/eLMpCc0t1cg\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/Mhq-TX4eA64\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/CvvXkXiF3Ig\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/Hxghhpe9fYs\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/qtUgKhw39Yo\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/-WjBA6yqW0Q\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:36:02\tArthur Shaw:\tTIL that the subset operator has parameters. Thanks, Trevin!\n00:38:55\tVaibhav Janve:\tits interesting that carriage \"a\" has two set of wheels instread of 4. I wonder that choice is because its atomic.\n00:40:44\tArthur Shaw:\t@Vaibhav, because the load is lighter, the carriage needs fewer axles? ;) I agree: it's a confusing graphical choice.\n00:41:11\tVaibhav Janve:\tlol\n01:05:53\tVaibhav Janve:\tThank you Trevin!\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/LBU-Ew_IM7A\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<iframe src=\"https://www.youtube.com/embed/W9CoQ15NlOc\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:40:18\tRyan Honomichl:\tWhat type of vector does each of the following calls to ifelse() return?\n\n* \"ifelse returns a value with the same shape as test which is filled with elements selected from either yes or no depending on whether the element of test is TRUE or FALSE.\"\n00:42:11\tRyan Honomichl:\t\"I recommend assigning the results of an if statement only when the entire expression fits on one line; otherwise it tends to be hard to read\"\n00:42:46\tRyan Honomichl:\t* When you use the single argument form without an `else` statement, `if` invisibly returns NULL if the condition is FALSE. \n\n- Since functions like c() and paste() drop NULL inputs, this allows for a compact expression of certain idioms\n00:54:15\tcollinberke:\thttps://docs.google.com/spreadsheets/d/1ScrbEw_-vB9DruaJhjtVY8HLQmuNPqyWeOOjmG6OY1M/edit?usp=sharing\n00:58:46\tcollinberke:\thttps://www.youtube.com/@safe4democracy/videos\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Control flow\n---\n\n## Learning objectives:\n\n- Learn the **tools** for controlling flow of execution.\n\n- Learn some technical pitfalls and (perhaps lesser known) useful features.\n\n\n::: {.cell layout-align=\"left\"}\n::: {.cell-output-display}\n{fig-align='left' width=518}\n:::\n:::\n\n\n::: {.cell layout-align=\"right\"}\n::: {.cell-output-display}\n{fig-align='right' width=520}\n:::\n:::\n\n\n---\n\n## Introduction\n\nThere are two main groups of flow control tools: **choices** and **loops**: \n\n- Choices (`if`, `switch`, `ifelse`, `dplyr::if_else`, `dplyr::case_when`) allow you to run different code depending on the input. \n \n- Loops (`for`, `while`, `repeat`) allow you to repeatedly run code \n\n\n---\n\n\n## Choices\n\n\n\n`if()` and `else`\n\nUse `if` to specify a block of code to be executed, if a specified condition is true. Use `else` to specify a block of code to be executed, if the same condition is false. \n\n\n::: {.cell}\n\n```{.r .cell-code}\nif (condition) true_action\nif (condition) true_action else false_action\n```\n:::\n\n\n(Note braces are only *needed* for compound expressions)\n\n\n::: {.cell}\n\n```{.r .cell-code}\nif (test_expression) { \n true_action\n} else {\n false_action\n}\n```\n:::\n\n\n\nCan be expanded to more alternatives:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nif (test_expression) { \n true_action\n} else if (other_test_expression) {\n other_action\n} else {\n false_action\n}\n```\n:::\n\n\n\n## Exercise {-}\nWhy does this work?\n```\nx <- 1:10\nif (length(x)) \"not empty\" else \"empty\"\n#> [1] \"not empty\"\n\nx <- numeric()\nif (length(x)) \"not empty\" else \"empty\"\n#> [1] \"empty\"\n```\n\n`if` returns a value which can be assigned\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx1 <- if (TRUE) 1 else 2\nx2 <- if (FALSE) 1 else 2\n\nc(x1, x2)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 2\n```\n\n\n:::\n:::\n\n\nThe book recommends assigning the results of an if statement only when the entire expression fits on one line; otherwise it tends to be hard to read.\n\n\n## Single if without else {-}\n\nWhen you use the single argument form without an else statement, if invisibly (Section 6.7.2) returns NULL if the condition is FALSE. Since functions like c() and paste() drop NULL inputs, this allows for a compact expression of certain idioms:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ngreet <- function(name, birthday = FALSE) {\n paste0(\n \"Hi \", name,\n if (birthday) \" and HAPPY BIRTHDAY\"\n )\n}\ngreet(\"Maria\", FALSE)\n#> [1] \"Hi Maria\"\ngreet(\"Jaime\", TRUE)\n#> [1] \"Hi Jaime and HAPPY BIRTHDAY\"\n```\n:::\n\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nformat_lane_text <- function(number){\n\n paste0(\n number,\n \" lane\",\n if (number > 1) \"s\",\n \" of sequencing\"\n )\n}\n\nformat_lane_text(1)\n#> [1] \"1 lane of sequencing\"\nformat_lane_text(4)\n#> [1] \"4 lanes of sequencing\"\n```\n:::\n\n\n\n\n\n## Invalid inputs {-}\n\n- *Condition* must evaluate to a *single* `TRUE` or `FALSE`\n\nA single number gets coerced to a logical type. \n\n\n::: {.cell}\n\n```{.r .cell-code}\nif (56) 1\n#> [1] 1\nif (0.3) 1\n#> [1] 1\nif (0) 1\n```\n:::\n\n\nIf the condition cannot evaluate to a *single* `TRUE` or `FALSE`, an error is (usually) produced.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nif (\"text\") 1\n#> Error in if (\"text\") 1: argument is not interpretable as logical\nif (\"true\") 1 \n#> 1\nif (numeric()) 1\n#> Error in if (numeric()) 1: argument is of length zero\nif (NULL) 1\n#> Error in if (NULL) 1 : argument is of length zero\nif (NA) 1\n#> Error in if (NA) 1: missing value where TRUE/FALSE needed\n```\n:::\n\n\n\nException is a logical vector of length greater than 1, which only generates a warning, unless you have `_R_CHECK_LENGTH_1_CONDITION_` set to `TRUE`. \nThis seems to have been the default since R-4.2.0\n\n\n::: {.cell}\n\n```{.r .cell-code}\nif (c(TRUE, FALSE)) 1\n#>Error in if (c(TRUE, FALSE)) 1 : the condition has length > 1\n```\n:::\n\n\n## Vectorized choices {-}\n\n- `ifelse()` is a vectorized version of `if`:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- 1:10\nifelse(x %% 5 == 0, \"XXX\", as.character(x))\n#> [1] \"1\" \"2\" \"3\" \"4\" \"XXX\" \"6\" \"7\" \"8\" \"9\" \"XXX\"\n\nifelse(x %% 2 == 0, \"even\", \"odd\")\n#> [1] \"odd\" \"even\" \"odd\" \"even\" \"odd\" \"even\" \"odd\" \"even\" \"odd\" \"even\"\n```\n:::\n\n\n- `dplyr::if_else()`\n\n- Book recommends only using `ifelse()` \"only when the yes and no vectors are the same type as it is otherwise hard to predict the output type.\" \n\n- `dplyr::if_else()` enforces this recommendation.\n\n**For example:**\n\n\n::: {.cell}\n\n```{.r .cell-code}\nifelse(c(TRUE,TRUE,FALSE),\"a\",3)\n#> [1] \"a\" \"a\" \"3\"\ndplyr::if_else(c(TRUE,TRUE,FALSE),\"a\",3)\n#> Error in `dplyr::if_else()`:\n#> ! `false` must be a character vector, not a double vector.\n```\n:::\n\n \n## Switch {-}\n\nRather then string together multiple if - else if chains, you can often use `switch`.\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncentre <- function(x, type) {\n switch(type,\n mean = mean(x),\n median = median(x),\n trimmed = mean(x, trim = .1),\n stop(\"Invalid `type` value\")\n )\n}\n```\n:::\n\n\nLast component should always throw an error, as unmatched inputs would otherwise invisibly return NULL.\nBook recommends to only use character inputs for `switch()`.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvec <- c(1:20,50:55)\ncentre(vec, \"mean\")\n#> [1] 20.19231\ncentre(vec, \"median\")\n#> [1] 13.5\ncentre(vec, \"trimmed\")\n#> [1] 18.77273\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nset.seed(123)\nx <- rlnorm(100)\n\ncenters <- data.frame(type = c('mean', 'median', 'trimmed'))\ncenters$value = sapply(centers$type, \\(t){centre(x,t)})\n\nrequire(ggplot2)\nggplot(data = data.frame(x), aes(x))+\n geom_density()+\n geom_vline(data = centers, \n mapping = aes(color = type, xintercept = value), \n linewidth=0.5,linetype=\"dashed\") +\n xlim(-1,10)+\n theme_bw()\n```\n\n::: {.cell-output-display}\n{width=672}\n:::\n:::\n\n\n\nExample from book of \"falling through\" to next value\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlegs <- function(x) {\n switch(x,\n cow = ,\n horse = ,\n dog = 4,\n human = ,\n chicken = 2,\n plant = 0,\n stop(\"Unknown input\")\n )\n}\nlegs(\"cow\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 4\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] 4\nlegs(\"dog\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 4\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] 4\n```\n:::\n\n\n\n\n\n## Using `dplyr::case_when` {-}\n\n- `case_when` is a more general `if_else` and can be used often in place of multiple chained `if_else` or sapply'ing `switch`.\n\n- It uses a special syntax to allow any number of condition-vector pairs:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nset.seed(123)\nx <- rlnorm(100)\n\ncenters <- data.frame(type = c('mean', 'median', 'trimmed'))\n\ncenters$value = dplyr::case_when(\n centers$type == 'mean' ~ mean(x),\n centers$type == 'median' ~ median(x),\n centers$type == 'trimmed' ~ mean(x, trim = 0.1),\n .default = 1000\n )\n\ncenters\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> type value\n#> 1 mean 1.652545\n#> 2 median 1.063744\n#> 3 trimmed 1.300568\n```\n\n\n:::\n:::\n\n\n \n\n## Loops\n\n- Iteration over a elements of a vector\n\n`for (item in vector) perform_action`\n\n**First example**\n\n::: {.cell}\n\n```{.r .cell-code}\nfor(i in 1:5) {\n print(1:i)\n}\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1\n#> [1] 1 2\n#> [1] 1 2 3\n#> [1] 1 2 3 4\n#> [1] 1 2 3 4 5\n```\n\n\n:::\n\n```{.r .cell-code}\nx <- numeric(length=5L)\ndf <- data.frame(x=1:5)\n\nfor(i in 1:5) {\n df$y[[i]] <- i+1\n}\n```\n:::\n\n\n\n**Second example**: terminate a *for loop* earlier\n\n- `next` skips rest of current iteration\n- `break` exits the loop entirely\n\n\n::: {.cell}\n\n```{.r .cell-code}\nfor (i in 1:10) {\n if (i < 3) \n next\n\n print(i)\n \n if (i >= 5)\n break\n}\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 3\n#> [1] 4\n#> [1] 5\n```\n\n\n:::\n:::\n\n\n## Exercise {-}\n\nWhen the following code is evaluated, what can you say about the vector being iterated?\n```\nxs <- c(1, 2, 3)\nfor (x in xs) {\n xs <- c(xs, x * 2)\n}\nxs\n#> [1] 1 2 3 2 4 6\n```\n\n## Pitfalls {-}\n\n- Preallocate output containers to avoid *slow* code. \n\n- Beware that `1:length(v)` when `v` has length 0 results in a iterating backwards over `1:0`, probably not what is intended. Use `seq_along(v)` instead.\n\n- When iterating over S3 vectors, use `[[]]` yourself to avoid stripping attributes. \n\n```\nxs <- as.Date(c(\"2020-01-01\", \"2010-01-01\"))\nfor (x in xs) {\n print(x)\n}\n#> [1] 18262\n#> [1] 14610\n```\nvs. \n```\nfor (i in seq_along(xs)) {\n print(xs[[i]])\n}\n#> [1] \"2020-01-01\"\n#> [1] \"2010-01-01\"\n```\n\n## Related tools {-}\n\n- `while(condition) action`: performs action while condition is TRUE.\n- `repeat(action)`: repeats action forever (i.e. until it encounters break).\n\n- Note that `for` can be rewritten as `while` and while can be rewritten as `repeat` (this goes in one direction only!); *however*:\n\n>Good practice is to use the least-flexible solution to a problem, so you should use `for` wherever possible.\nBUT you shouldn't even use for loops for data analysis tasks as `map()` and `apply()` already provide *less flexible* solutions to most problems. (More in Chapter 9.)\n\n\n::: {.cell}\n\n```{.r .cell-code}\nfor (i in 1:5) {\n print(i)\n}\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1\n#> [1] 2\n#> [1] 3\n#> [1] 4\n#> [1] 5\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx_option <- function(x) {\n switch(x,\n a = \"option 1\",\n b = \"option 2\",\n c = \"option 3\"#,\n #stop(\"Invalid `x` value\")\n )\n}\n```\n:::\n\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ni <- 1\n\nwhile(i <=5 ) {\n print(i)\n i <- i+1\n}\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1\n#> [1] 2\n#> [1] 3\n#> [1] 4\n#> [1] 5\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ni <- 1\n\nrepeat {\n print(i)\n i <- i+1\n if (i > 5) break\n}\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1\n#> [1] 2\n#> [1] 3\n#> [1] 4\n#> [1] 5\n```\n\n\n:::\n:::\n\n\n\n---\n\n\n\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/96eY6YS_3hU\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/x5I_uHnMxIk\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/u6UMGWDuxDE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/G4YOvwsSw2Q\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/AZwJjsl8xiI\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/wg2QZ3rMIqM\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:16:34\tFederica Gazzelloni:\thttps://github.com/r4ds/bookclub-Advanced_R\n00:22:28\tFederica Gazzelloni:\thttps://stackoverflow.com/questions/50646133/dplyr-if-else-vs-base-r-ifelse\n00:26:20\tTrevin:\tcase_when() is great, makes it easy to read\n00:54:01\tTrevin:\tout[I, ]\n00:54:14\tTrevin:\tout[i, ]\n00:55:03\tTrevin:\tI think you have to specify number of rows and columns before..\n00:55:30\tTrevin:\titerations = 10\n variables = 2\n\n output <- matrix(ncol=variables, nrow=iterations)\n00:55:43\tTrevin:\thttps://stackoverflow.com/questions/13442461/populating-a-data-frame-in-r-in-a-loop\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/W9CoQ15NlOc\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:40:18\tRyan Honomichl:\tWhat type of vector does each of the following calls to ifelse() return?\n\n* \"ifelse returns a value with the same shape as test which is filled with elements selected from either yes or no depending on whether the element of test is TRUE or FALSE.\"\n00:42:11\tRyan Honomichl:\t\"I recommend assigning the results of an if statement only when the entire expression fits on one line; otherwise it tends to be hard to read\"\n00:42:46\tRyan Honomichl:\t* When you use the single argument form without an `else` statement, `if` invisibly returns NULL if the condition is FALSE. \n\n- Since functions like c() and paste() drop NULL inputs, this allows for a compact expression of certain idioms\n00:54:15\tcollinberke:\thttps://docs.google.com/spreadsheets/d/1ScrbEw_-vB9DruaJhjtVY8HLQmuNPqyWeOOjmG6OY1M/edit?usp=sharing\n00:58:46\tcollinberke:\thttps://www.youtube.com/@safe4democracy/videos\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Functions\n---\n\n## Learning objectives:\n\n- How to make functions in R\n- What are the parts of a function\n- Nested functions\n\n## How to make a simple function in R\n\nLet's imagine the structure of a function:\n\n\n::: {.cell layout-align=\"center\"}\n::: {.cell-output-display}\n{fig-align='center' width=133}\n:::\n:::\n\n\n\n**Function components**\n\nFunctions have three parts, `formals()`, `body()`, and `environment()`.\n\n\n::: {.cell layout-align=\"center\"}\n::: {.cell-output-display}\n\n```{=html}\n<div id=\"htmlwidget-3af49631d9fe5bef303e\" style=\"width:100%;height:100%;\" class=\"DiagrammeR html-widget\"></div>\n<script type=\"application/json\" data-for=\"htmlwidget-3af49631d9fe5bef303e\">{\"x\":{\"diagram\":\"\\n graph LR\\n A{formals}-->B(body)\\n B-->C(environment)\\nstyle A fill:#bbf,stroke:#f66,stroke-width:2px,color:#fff,stroke-dasharray: 5 5\\n\"},\"evals\":[],\"jsHooks\":[]}</script>\n```\n\n:::\n:::\n\n\n**Example**\n\n\n::: {.cell}\n\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncoffee_ratings%>%slice(1:3)%>%select(1:5)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 3 × 5\n#> total_cup_points species owner country_of_origin farm_name \n#> <dbl> <chr> <chr> <chr> <chr> \n#> 1 90.6 Arabica metad plc Ethiopia \"metad pl…\n#> 2 89.9 Arabica metad plc Ethiopia \"metad pl…\n#> 3 89.8 Arabica grounds for health admin Guatemala \"san marc…\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\navg_points <- function(species){\n # this function is for calculating the mean\n avg <- coffee_ratings %>% \n filter(species == species) %>% \n summarise(mean = mean(total_cup_points))\n \n return(avg)\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\navg_points(\"Arabica\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 1 × 1\n#> mean\n#> <dbl>\n#> 1 82.1\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nformals(avg_points)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $species\n```\n\n\n:::\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nbody(avg_points)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> {\n#> avg <- coffee_ratings %>% filter(species == species) %>% \n#> summarise(mean = mean(total_cup_points))\n#> return(avg)\n#> }\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nenvironment(avg_points)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: R_GlobalEnv>\n```\n\n\n:::\n:::\n\n\nFunctions uses attributes, one attribute used by base R is `srcref`, short for **source reference**. It points to the source code used to create the function. It contains code comments and other formatting.\n\n::: {.cell}\n\n```{.r .cell-code}\nattr(avg_points, \"srcref\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> NULL\n```\n\n\n:::\n:::\n\n\n## Primitive functions\n\nAre the core function in base R, such as `sum()`\n\n::: {.cell}\n\n```{.r .cell-code}\nsum\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (..., na.rm = FALSE) .Primitive(\"sum\")\n```\n\n\n:::\n:::\n\n\nType of primitives:\n\n- builtin \n- special\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntypeof(sum)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"builtin\"\n```\n\n\n:::\n:::\n\n\n\nThese core functions have components to NULL.\n\n## Anonymous functions\n\nIf you don't provide a name to a function\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlapply(mtcars%>%select(mpg,cyl), function(x) length(unique(x)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $mpg\n#> [1] 25\n#> \n#> $cyl\n#> [1] 3\n```\n\n\n:::\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvector_len <- function(x) {\n length(unique(x))\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlapply(mtcars%>%select(mpg,cyl), vector_len)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $mpg\n#> [1] 25\n#> \n#> $cyl\n#> [1] 3\n```\n\n\n:::\n:::\n\n\n**Invoking a function**\n\n\n::: {.cell}\n\n```{.r .cell-code}\nargs <- unique(coffee_ratings$species) %>% \n `[[`(1) %>% \n as.list()\n \n \n \ndo.call(avg_points, args)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 1 × 1\n#> mean\n#> <dbl>\n#> 1 82.1\n```\n\n\n:::\n:::\n\n\n\n\n## Function composition\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsquare <- function(x) x^2\ndeviation <- function(x) x - mean(x)\nx <- runif(100)\nsqrt(mean(square(deviation(x))))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 0.2933335\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nout <- deviation(x)\nout <- square(out)\nout <- mean(out)\nout <- sqrt(out)\nout\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 0.2933335\n```\n\n\n:::\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx %>%\n deviation() %>%\n square() %>%\n mean() %>%\n sqrt()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 0.2933335\n```\n\n\n:::\n:::\n\n\n## More about functions insights\n\n### Lexical scoping\n\n**Rules**\n\n- Name masking\n- Functions versus variables\n- A fresh start\n- Dynamic lookup\n\n\n**Debugging**\n\nThis function \n\n::: {.cell}\n\n```{.r .cell-code}\ng12 <- function() x + 1\nx <- 15\ng12()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 16\n```\n\n\n:::\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncodetools::findGlobals(g12)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"+\" \"x\"\n```\n\n\n:::\n:::\n\n\nYou can change the function’s environment to an environment which contains nothing:\n\n::: {.cell}\n\n```{.r .cell-code}\n# environment(g12) <- emptyenv()\n# g12()\n# Error in x + 1 : could not find function \"+\"\n```\n:::\n\n\n\n### ... (dot-dot-dot)\n\n**Example**\n\n\n::: {.cell}\n\n```{.r .cell-code}\ni01 <- function(y, z) {\n list(y = y, z = z)\n}\ni02 <- function(x, ...) {\n i01(...)\n}\nstr(i02(x = 1, y = 2, z = 3))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> List of 2\n#> $ y: num 2\n#> $ z: num 3\n```\n\n\n:::\n\n```{.r .cell-code}\n#> List of 2\n#> $ y: num 2\n#> $ z: num 3\n```\n:::\n\n\n### Exiting a function\n\n1. Implicit or explicit returns\n\n2. Invisibility (`<-` most famous function that returns an invisible value)\n\n3. `stop()` to stop a function with an error.\n\n4. Exit handlers\n\n\n### Function forms\n\n>Everything that exists is an object.\nEverything that happens is a function call.\n— John Chambers\n\n\n\n::: {.cell}\n::: {.cell-output-display}\n{width=584}\n:::\n:::\n\n\n---\n\n\n## Case Study: SIR model function\n\nThis is an interesting example taken from a course on Coursera: [Infectious disease modelling-ICL](https://www.coursera.org/specializations/infectious-disease-modelling)\n\nThe purpose of this example is to show how to make a model passing through making a function.\n\nFirst we need to load some useful libraries:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(deSolve)\nlibrary(reshape2)\n```\n:::\n\n\n\nThen set the model inputs:\n\n- population size (N)\n- number of susceptable (S)\n- infected (I)\n- recovered (R)\n\nAnd add the model parameters:\n\n- infection rate ($\\beta$)\n- recovery rate ($\\gamma$)\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nN<- 100000 # population\n\nstate_values<- c(S = N -1, # susceptible\n I = 1, # infected\n R = 0) # recovered\n\nparameters<- c(beta = 1/2, # infection rate days^-1\n gamma = 1/4) # recovery rate days^-1\n```\n:::\n\n\n\nThen we set the **time** as an important factor, which defines the length of time we are looking at this model run. It is intended as the time range in which the infections spread out, let’s say that we are aiming to investigate an infection period of 100 days.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntimes<- seq(0, 100, by = 1)\n```\n:::\n\n\nFinally, we set up the **SIR model**, the susceptable, infected and recovered model. How do we do that is passing the paramenters through a function of the time, and state.\n\nWithin the model function we calculate one more paramenter, the **force of infection**: $\\lambda$ \n\n\n::: {.cell}\n\n```{.r .cell-code}\nsir_model<- function(time, state, parameters){\n with(as.list(c(state, parameters)),{\n N<- S + I + R\n lambda = beta * I/N # force of infection\n dS<- - lambda * S \n dI<- lambda * S - gamma * I\n dR<- gamma * I\n return(list(c(dS,dI,dR)))\n })\n}\n```\n:::\n\n\n\nOnce we have our **SIR model** function ready, we can calculate the **output** of the model, with the help of the function `ode()` from {deSolve} package.\n\n\n::: {.cell}\n\n```{.r .cell-code}\noutput<- as.data.frame(ode(y = state_values,\n times = times,\n func = sir_model,\n parms = parameters))\noutput %>% head\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> time S I R\n#> 1 0 99999.00 1.000000 0.0000000\n#> 2 1 99998.43 1.284018 0.2840252\n#> 3 2 99997.70 1.648696 0.6487171\n#> 4 3 99996.77 2.116939 1.1169863\n#> 5 4 99995.56 2.718152 1.7182450\n#> 6 5 99994.02 3.490086 2.4902600\n```\n\n\n:::\n:::\n\n\nIn addition to our builtin SIR model function we can have a look at:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n?deSolve::ode()\n```\n:::\n\n\nIt solves **Ordinary Differential Equations**. \n\n\n::: {.cell}\n\n```{.r .cell-code}\ndeSolve:::ode\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (y, times, func, parms, method = c(\"lsoda\", \"lsode\", \n#> \"lsodes\", \"lsodar\", \"vode\", \"daspk\", \"euler\", \"rk4\", \"ode23\", \n#> \"ode45\", \"radau\", \"bdf\", \"bdf_d\", \"adams\", \"impAdams\", \"impAdams_d\", \n#> \"iteration\"), ...) \n#> {\n#> if (is.null(method)) \n#> method <- \"lsoda\"\n#> if (is.list(method)) {\n#> if (!inherits(method, \"rkMethod\")) \n#> stop(\"'method' should be given as string or as a list of class 'rkMethod'\")\n#> out <- rk(y, times, func, parms, method = method, ...)\n#> }\n#> else if (is.function(method)) \n#> out <- method(y, times, func, parms, ...)\n#> else if (is.complex(y)) \n#> out <- switch(match.arg(method), vode = zvode(y, times, \n#> func, parms, ...), bdf = zvode(y, times, func, parms, \n#> mf = 22, ...), bdf_d = zvode(y, times, func, parms, \n#> mf = 23, ...), adams = zvode(y, times, func, parms, \n#> mf = 10, ...), impAdams = zvode(y, times, func, parms, \n#> mf = 12, ...), impAdams_d = zvode(y, times, func, \n#> parms, mf = 13, ...))\n#> else out <- switch(match.arg(method), lsoda = lsoda(y, times, \n#> func, parms, ...), vode = vode(y, times, func, parms, \n#> ...), lsode = lsode(y, times, func, parms, ...), lsodes = lsodes(y, \n#> times, func, parms, ...), lsodar = lsodar(y, times, func, \n#> parms, ...), daspk = daspk(y, times, func, parms, ...), \n#> euler = rk(y, times, func, parms, method = \"euler\", ...), \n#> rk4 = rk(y, times, func, parms, method = \"rk4\", ...), \n#> ode23 = rk(y, times, func, parms, method = \"ode23\", ...), \n#> ode45 = rk(y, times, func, parms, method = \"ode45\", ...), \n#> radau = radau(y, times, func, parms, ...), bdf = lsode(y, \n#> times, func, parms, mf = 22, ...), bdf_d = lsode(y, \n#> times, func, parms, mf = 23, ...), adams = lsode(y, \n#> times, func, parms, mf = 10, ...), impAdams = lsode(y, \n#> times, func, parms, mf = 12, ...), impAdams_d = lsode(y, \n#> times, func, parms, mf = 13, ...), iteration = iteration(y, \n#> times, func, parms, ...))\n#> return(out)\n#> }\n#> <bytecode: 0x0000015da4cbceb0>\n#> <environment: namespace:deSolve>\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmethods(\"ode\")\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning in .S3methods(generic.function, class, envir, all.names = all.names, :\n#> function 'ode' appears not to be S3 generic; found functions that look like S3\n#> methods\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] ode.1D ode.2D ode.3D ode.band\n#> see '?methods' for accessing help and source code\n```\n\n\n:::\n:::\n\n\n\n---\n\nWith the help of the {reshape2} package we use the function `melt()` to reshape the output:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmelt(output,id=\"time\") %>% head\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> time variable value\n#> 1 0 S 99999.00\n#> 2 1 S 99998.43\n#> 3 2 S 99997.70\n#> 4 3 S 99996.77\n#> 5 4 S 99995.56\n#> 6 5 S 99994.02\n```\n\n\n:::\n:::\n\n\n\nThe same as usign `pivot_longer()` function.\n\n::: {.cell}\n\n```{.r .cell-code}\noutput%>%\n pivot_longer(cols = c(\"S\",\"I\",\"R\"),\n names_to=\"variable\",\n values_to=\"values\") %>%\n arrange(desc(variable)) %>%\n head\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 6 × 3\n#> time variable values\n#> <dbl> <chr> <dbl>\n#> 1 0 S 99999 \n#> 2 1 S 99998.\n#> 3 2 S 99998.\n#> 4 3 S 99997.\n#> 5 4 S 99996.\n#> 6 5 S 99994.\n```\n\n\n:::\n:::\n\n\n---\n\n\nBefore to proceed with the visualization of the SIR model output we do a bit of investigations.\n\n**What if we want to see how `melt()` function works?**\n\n**What instruments we can use to see inside the function and understand how it works?**\n\n\nUsing just the function name **melt** or `structure()` function with *melt* as an argument, we obtain the same output. To select just the argument of the function we can do `args(melt)`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nreshape2:::melt\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (data, ..., na.rm = FALSE, value.name = \"value\") \n#> {\n#> UseMethod(\"melt\", data)\n#> }\n#> <bytecode: 0x0000015dabe62738>\n#> <environment: namespace:reshape2>\n```\n\n\n:::\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nbody(melt)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> {\n#> UseMethod(\"melt\", data)\n#> }\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nformals(melt)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $data\n#> \n#> \n#> $...\n#> \n#> \n#> $na.rm\n#> [1] FALSE\n#> \n#> $value.name\n#> [1] \"value\"\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nenvironment(melt)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: namespace:reshape2>\n```\n\n\n:::\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntypeof(melt)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"closure\"\n```\n\n\n:::\n:::\n\n\n> \"R functions simulate a closure by keeping an explicit reference to the environment that was active when the function was defined.\"\n\n\nref: [closures](https://www.r-bloggers.com/2015/03/using-closures-as-objects-in-r/)\n\n\n\nTry with `methods()`, or `print(methods(melt))`: Non-visible functions are asterisked!\n\n> The S3 method name is followed by an asterisk * if the method definition is not exported from the package namespace in which the method is defined.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmethods(\"melt\", data)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] melt.array* melt.data.frame* melt.default* melt.list* \n#> [5] melt.matrix* melt.table* \n#> see '?methods' for accessing help and source code\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmethods(class=\"table\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] [ aperm as.data.frame as_tibble Axis \n#> [6] coerce initialize lines melt plot \n#> [11] points print show slotsFromS3 summary \n#> [16] tail \n#> see '?methods' for accessing help and source code\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nhelp(UseMethod)\n```\n:::\n\n\n\nWe can access to some of the above calls with `getAnywhere()`, for example here is done for \"melt.data.frame\":\n\n::: {.cell}\n\n```{.r .cell-code}\ngetAnywhere(\"melt.data.frame\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> A single object matching 'melt.data.frame' was found\n#> It was found in the following places\n#> registered S3 method for melt from namespace reshape2\n#> namespace:reshape2\n#> with value\n#> \n#> function (data, id.vars, measure.vars, variable.name = \"variable\", \n#> ..., na.rm = FALSE, value.name = \"value\", factorsAsStrings = TRUE) \n#> {\n#> vars <- melt_check(data, id.vars, measure.vars, variable.name, \n#> value.name)\n#> id.ind <- match(vars$id, names(data))\n#> measure.ind <- match(vars$measure, names(data))\n#> if (!length(measure.ind)) {\n#> return(data[id.vars])\n#> }\n#> args <- normalize_melt_arguments(data, measure.ind, factorsAsStrings)\n#> measure.attributes <- args$measure.attributes\n#> factorsAsStrings <- args$factorsAsStrings\n#> valueAsFactor <- \"factor\" %in% measure.attributes$class\n#> df <- melt_dataframe(data, as.integer(id.ind - 1), as.integer(measure.ind - \n#> 1), as.character(variable.name), as.character(value.name), \n#> as.pairlist(measure.attributes), as.logical(factorsAsStrings), \n#> as.logical(valueAsFactor))\n#> if (na.rm) {\n#> return(df[!is.na(df[[value.name]]), ])\n#> }\n#> else {\n#> return(df)\n#> }\n#> }\n#> <bytecode: 0x0000015da1c4f580>\n#> <environment: namespace:reshape2>\n```\n\n\n:::\n:::\n\n\n\nReferences:\n\n- [stackoverflow article](https://stackoverflow.com/questions/11173683/how-can-i-read-the-source-code-for-an-r-function)\n- [Rnews bulletin: R Help Desk](https://www.r-project.org/doc/Rnews/Rnews_2006-4.pdf)\n\n\n\n---\n\nGoing back to out model output visualization.\n\n\n::: {.cell}\n\n```{.r .cell-code}\noutput_full<- melt(output,id=\"time\")\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\noutput_full$proportion<- output_full$value/sum(state_values)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nggplot(data = output, aes(x = time, y = I)) + \n geom_line() + \n xlab(\"Time(days)\") +\n ylab(\"Number of Infected\") + \n labs(\"SIR Model: prevalence of infection\")\n```\n\n::: {.cell-output-display}\n{width=672}\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nggplot(output_full, aes(time, proportion, color = variable, group = variable)) + \n geom_line() + \n xlab(\"Time(days)\") +\n ylab(\"Prevalence\") + \n labs(color = \"Compartment\", title = \"SIR Model\")\n```\n\n::: {.cell-output-display}\n{width=672}\n:::\n:::\n\n\n\n\n\n---\n\n\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/UwzGhMndWzs\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/51PMEM4Efb8\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/Vwuo-e_Ir0s\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/lg5rzOU6lsg\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/q8K0Jl5hiV0\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/BPd6-G9e32I\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:01:11\tOluwafemi Oyedele:\tHi, Good evening\n00:01:22\tFederica Gazzelloni:\tHello!\n00:43:19\tFederica Gazzelloni:\thttps://r4ds.github.io/bookclub-Advanced_R/QandA/docs/welcome.html\n00:52:48\tPriyanka:\tsounds good actually\n00:52:59\tFederica Gazzelloni:\t👍🏻\n```\n</details>\n\n<iframe src=\"https://www.youtube.com/embed/GCDXXkBQrGk\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:09:30\tOluwafemi Oyedele:\tHi, Good evening\n00:10:41\tFederica Gazzelloni:\tHi\n00:14:40\tFederica Gazzelloni:\tthat's great!\n00:54:24\tTrevin:\tAlso, sorry if you are repeating 🙂\n00:54:52\tArthur Shaw:\t@ryan, thank you so much for the awesome synthesis! Could you share your reference list? I'd love to dive more deeply into the material you presented.\n00:57:02\tRyan Metcalf:\thttps://cran.r-project.org/doc/manuals/r-release/R-lang.pdf\n00:59:32\tTrevin:\thttps://github.com/COHHIO/RmData\n01:01:48\tRyan Metcalf:\thttps://mastering-shiny.org/\n01:02:02\tRyan Metcalf:\thttps://engineering-shiny.org/\n01:02:15\tArthur Shaw:\t@trevin, if you get bored with beepr, move to BRRR ;)\n01:02:16\tArthur Shaw:\thttps://github.com/brooke-watson/BRRR\n01:09:27\tRyan Metcalf:\tThis is amazing Trevin! I'll take a closer look. Is it ok to reach out to you with any questions?\n01:09:43\tTrevin:\tYeah, feel free to reach out\n```\n</details>\n\n<iframe src=\"https://www.youtube.com/embed/NaiQa_u-j1k\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:05:34\tTrevin:\tI didn't catch that\n00:06:02\tpriyanka gagneja:\ti won't be presenting I said .. so you two have the stage\n00:08:39\tFederica Gazzelloni:\tno worries\n00:08:46\tFederica Gazzelloni:\tnext time you do it\n00:08:56\tFederica Gazzelloni:\tdid you sign up?\n00:09:45\tTrevin:\tDiscord is free: https://discord.gg/rstudioconf2022\n00:10:04\tTrevin:\tFree stream link: https://www.rstudio.com/conference/stream\n00:24:32\tArthur Shaw:\tMaybe silly question: is the magrittr pipe an infix function?\n00:32:15\tTrevin:\thttps://colinfay.me/playing-r-infix-functions/\n00:33:23\tArthur Shaw:\tMaybe another example of an infix function: lubridate's `%within%`\n00:33:47\tTrevin:\tThat's a good one too ^\n00:33:55\tpriyanka gagneja:\tyes within would be good.\n00:40:13\tArthur Shaw:\tno\n00:49:50\tArthur Shaw:\tSorry for dropping in and out. My WiFi router is having issues today--maybe is failing.\n01:08:59\tTrevin:\tLooking forward to it 🙂\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/tz2z9l41IhU\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:31:54\tRonald Legere:\thttps://en.wikipedia.org/wiki/First-class_function\n00:42:55\tRonald Legere:\thttps://en.wikipedia.org/wiki/Immediately_invoked_function_expression\n```\n</details>\n\n<iframe src=\"https://www.youtube.com/embed/AbdcI57vbcg\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:54:02\tRon:\tBook gives this simple example of when you might want to use prefix form of an infix operator: lapply(list(1:3, 4:5), `+`, 3)\n00:56:49\tcollinberke:\thttps://colinfay.me/playing-r-infix-functions/#:~:text=What%20are%20infix%20functions%3F,%2C%20%2B%20%2C%20and%20so%20on.\n01:07:36\tRon:\tx[3] <- 33\n01:07:51\tRon:\t`[<-`(x,3,value =33)\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Environments\n---\n\n## Learning objectives:\n\n- THESE ARE NICE TO HAVE BUT NOT ABSOLUTELY NECESSARY\n\n## SLIDE 1\n\n- ADD SLIDES AS SECTIONS (`##`).\n- TRY TO KEEP THEM RELATIVELY SLIDE-LIKE; THESE ARE NOTES, NOT THE BOOK ITSELF.\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/mk7iu1-P8ZU\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/syRMRYKN30k\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/fW7Di01gLhw\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/Aw_Q7PMYJkA\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/tuafimbMyKk\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/buUaaOu89EQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:08:41\tArthur Shaw:\tHello, everyone!\n00:21:31\tFederica Gazzelloni:\t?walk: Apply a function to each element of a list or atomic vector\n00:23:15\tFederica Gazzelloni:\t?caller_env: Get properties of the current or caller frame\n00:24:56\tTrevin:\tpurrr::walk(x, function(x, ce, ace = rlang::caller_env()) {\n .ce <- rlang::caller_env()\n message(\"Internal: \")\n print(.ce)\n message(\"Argument: \")\n print(ace)\n message(\"External: \")\n print(ce)\n message(\"Internal: \",paste0(ls(.ce), collapse = \"\\n\"))\n message(\"Argument: \",paste0(ls(ace), collapse = \"\\n\"))\n message(\"External: \",paste0(ls(ce), collapse = \"\\n\"))\n}, ce = rlang::caller_env())\n00:29:39\tFederica Gazzelloni:\t??iwalk: Apply a function to each element of a vector, and its index\n00:35:30\tArthur Shaw:\thttps://magrittr.tidyverse.org/reference/tee.html\n00:36:05\tFederica Gazzelloni:\t?`%T>%`\n00:46:59\tTrevin:\t?eval\n01:06:03\tFederica Gazzelloni:\thttps://cran.r-project.org/web/packages/withr/index.html\n01:09:21\tFederica Gazzelloni:\thttps://github.com/r-lib/withr\n01:10:38\tTrevin:\tI'm okay if we meet next week\n01:10:53\tOluwafemi Oyedele:\tI am ok with next week\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/PUXrijnsWy0\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary>Meeting chat log</summary>\n```\n00:06:49\tRyan Honomichl:\thttps://r4ds.github.io/bookclub-Advanced_R/QandA/docs/environments.html\n```\n</details>\n\n<iframe src=\"https://www.youtube.com/embed/6xECnY4ro48\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary>Meeting chat log</summary>\n```\n00:14:44\tcollinberke:\thttps://ivelasq.rbind.io/blog/macos-rig/index.html\n00:21:10\tcollinberke:\thttps://github.com/tidyverse/dplyr/blob/main/NAMESPACE\n01:00:21\tcollinberke:\thttps://r4ds.hadley.nz/iteration.html\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Conditions\n---\n\n## Learning objectives:\n\n- What conditions are\n- How to use them\n\n## Introduction\n\nWhat are conditions? Problems that happen in functions:\n\n- Error\n- Warning\n- Message\n\nAs a function author, one can signal them--that is, say there's a problem.\n\nAs a function consumer, one can handle them--for example, react or ignore.\n\n## Signalling conditions\n\n### Types of conditions\n\nThree types of conditions:\n\n- ❌ **Errors.** Problem arose, and the function cannot continue. \n- ⚠️ **Warnings.** Problem arose, but the function can continue, if only partially.\n- 💬 **Messages.** Something happened, and the user should know.\n\n### ❌ Errors\n\nHow to throw errors\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# with base R\nstop(\"... in the name of love...\")\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error: ... in the name of love...\n```\n\n\n:::\n\n```{.r .cell-code}\n# with rlang\nrlang::abort(\"...before you break my heart...\")\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error:\n#> ! ...before you break my heart...\n```\n\n\n:::\n\n```{.r .cell-code}\n# with base R; without call\nstop(\"... think it o-o-over...\", call. = FALSE)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error: ... think it o-o-over...\n```\n\n\n:::\n:::\n\nComposing error messages\n\n- Mechanics.\n - `stop()` pastes together arguments\n\n::: {.cell}\n\n```{.r .cell-code}\nsome_val <- 1\nstop(\"Your value is: \", some_val, call. = FALSE)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error: Your value is: 1\n```\n\n\n:::\n:::\n\n - `abort()` requires `{glue}`\n\n::: {.cell}\n\n```{.r .cell-code}\nsome_val <- 1\nrlang::abort(glue::glue(\"Your value is: {some_val}\"))\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error:\n#> ! Your value is: 1\n```\n\n\n:::\n:::\n\n- Style. See [here](http://style.tidyverse.org/error-messages.html).\n\n### ⚠️ Warnings\n\nMay have multiple warnings per call\n\n\n::: {.cell}\n\n```{.r .cell-code}\nwarn <- function() {\n warning(\"This is your first warning\")\n warning(\"This is your second warning\")\n warning(\"This is your LAST warning\")\n}\n```\n:::\n\n\nPrint all warnings once call is complete.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nwarn()\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning in warn(): This is your first warning\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning in warn(): This is your second warning\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning in warn(): This is your LAST warning\n```\n\n\n:::\n:::\n\n\nLike errors, `warning()` has\n\n- a call argument\n- an `{rlang}` analog\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# base R\n# ... with call (implicitly .call = TRUE)\nwarning(\"Warning\")\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning: Warning\n```\n\n\n:::\n\n```{.r .cell-code}\n# ... with call suppressed\nwarning(\"Warning\", call. = FALSE)\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning: Warning\n```\n\n\n:::\n\n```{.r .cell-code}\n# rlang\n# note: call suppressed by default\nrlang::warn(\"Warning\")\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning: Warning\n```\n\n\n:::\n:::\n\n\n(Hadley's) advice on usage:\n\n- Err on the side of errors. In other words, error rather than warn.\n- But warnings make sense in a few cases:\n - Function is being deprecated. Warn that it is reaching end of life.\n - Function is reasonably sure to recover from issue.\n\n### 💬 Messages\n\nMechanics:\n\n- Issued immediately\n- Do not have a call argument\n\nStyle:\n\nMessages are best when they inform about:\n\n- Default arguments\n- Status updates of for functions used primarily for side-effects (e.g., interaction with web API, file downloaded, etc.)\n- Progress of long-running process (in the absence of a status bar).\n- Package loading message (e.g., attaching package, objects masked)\n\n## Ignoring conditions\n\nA few ways:\n\n- `try()`\n- `suppressWarnings()`\n- `suppressMessages()`\n\n### `try()`\n\nWhat it does:\n\n- Displays error\n- But continues execution after error\n\n\n::: {.cell}\n\n```{.r .cell-code}\nbad_log <- function(x) {\n try(log(x))\n 10\n}\n\nbad_log(\"bad\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Error in log(x) : non-numeric argument to mathematical function\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 10\n```\n\n\n:::\n:::\n\n\nBetter ways to react to/recover from errors:\n\n1. Use `tryCatch()` to \"catch\" the error and perform a different action in the event of an error.\n1. Set a default value inside the call. See below.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndefault <- NULL\ntry(default <- read.csv(\"possibly-bad-input.csv\"), silent = TRUE)\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning in file(file, \"rt\"): cannot open file 'possibly-bad-input.csv': No such\n#> file or directory\n```\n\n\n:::\n:::\n\n\n\n### `suppressWarnings()`, `suppressMessages()`\n\nWhat it does:\n\n- Supresses all warnings (messages)\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# suppress warnings (from our `warn()` function above)\nsuppressWarnings(warn())\n\n# suppress messages\nmany_messages <- function() {\n message(\"Message 1\")\n message(\"Message 2\")\n message(\"Message 3\")\n}\n\nsuppressMessages(many_messages())\n```\n:::\n\n\n## Handling conditions\n\nEvery condition has a default behavior:\n\n- ❌ Errors halt execution\n- ⚠️ Warnings are collected during execution and displayed in bulk after execution\n- 💬 Messages are displayed immediately\n\nCondition handlers allow one to change that behavior (within the scope of a function).\n\nTwo handler functions:\n\n- `tryCatch()`\n- `withCallingHandlers()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# try to run `code_to_try_to_run`\n# if (error) condition is signalled, fun some other code\ntryCatch(\n error = function(cnd) {\n # code to run when error is thrown\n },\n code_to_try_to_run\n)\n\n# try to `code_to_try_to_run`\n# if condition is signalled, run code corresponding to condition type\nwithCallingHandlers(\n warning = function(cnd) {\n # code to run when warning is signalled\n },\n message = function(cnd) {\n # code to run when message is signalled\n },\n code_to_try_to_run\n)\n```\n:::\n\n\n\n### Condition objects\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# catch a condition\ncnd <- rlang::catch_cnd(stop(\"An error\"))\n# inspect it\nstr(cnd)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> List of 2\n#> $ message: chr \"An error\"\n#> $ call : language force(expr)\n#> - attr(*, \"class\")= chr [1:3] \"simpleError\" \"error\" \"condition\"\n```\n\n\n:::\n:::\n\n\nThe standard components\n\n- `message`. The error message. To extract it, use `conditionMessage(cnd)`.\n- `call`. The function call that triggered the condition. To extract it, use `conditionCall(cnd)`.\n\nBut custom conditions may contain other components.\n\n### Exiting handlers\n\nIf a condition is signalled, this type of handler controls what code to run before exiting the function call. \n\n\n::: {.cell}\n\n```{.r .cell-code}\nf3 <- function(x) {\n tryCatch(\n # if error signalled, return NA\n error = function(cnd) NA,\n # try to run log\n log(x)\n )\n}\n\nf3(\"x\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] NA\n```\n\n\n:::\n:::\n\n\nWhen a condition is signalled, control moves to the handler and never returns to the original code.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntryCatch(\n message = function(cnd) \"There\",\n {\n message(\"Here\")\n stop(\"This code is never run!\")\n }\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"There\"\n```\n\n\n:::\n:::\n\n\nThe `tryCatch()` exit handler has one final argument: `finally`. This is run regardless of the condition of the original code. This is often used for clean-up.\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# try to write text to disk\n# if an error is signalled--for example, `path` does not exist\n# or if no condition is signalled\n# that is in both cases, the code block in `finally` is executed\npath <- tempfile()\ntryCatch(\n {\n writeLines(\"Hi!\", path)\n # ...\n },\n finally = {\n # always run\n unlink(path)\n }\n)\n```\n:::\n\n\n### Calling handlers\n\nDefinition by verbal comparison:\n\n- With exit handlers, code exits the normal flow once a condition is signalled\n- With calling handlers, code continues in the normal flow once control is returned by the handler.\n\nDefinition by code comparison:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# with an exit handler, control moves to the handler once condition signalled and does not move back\ntryCatch(\n message = function(cnd) cat(\"Caught a message!\\n\"), \n {\n message(\"Someone there?\")\n message(\"Why, yes!\")\n }\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Caught a message!\n```\n\n\n:::\n\n```{.r .cell-code}\n# with a calling handler, control moves first to the handler and the moves back to the main code\nwithCallingHandlers(\n message = function(cnd) cat(\"Caught a message!\\n\"), \n {\n message(\"Someone there?\")\n message(\"Why, yes!\")\n }\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Caught a message!\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Someone there?\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Caught a message!\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Why, yes!\n```\n\n\n:::\n:::\n\n\n### By default, conditions propagate\n\nLet's suppose that there are nested handlers. If a condition is signalled in the child, it propagates to its parent handler(s).\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Bubbles all the way up to default handler which generates the message\nwithCallingHandlers(\n message = function(cnd) cat(\"Level 2\\n\"),\n withCallingHandlers(\n message = function(cnd) cat(\"Level 1\\n\"),\n message(\"Hello\")\n )\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Level 1\n#> Level 2\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Hello\n```\n\n\n:::\n\n```{.r .cell-code}\n# Bubbles up to tryCatch\ntryCatch(\n message = function(cnd) cat(\"Level 2\\n\"),\n withCallingHandlers(\n message = function(cnd) cat(\"Level 1\\n\"),\n message(\"Hello\")\n )\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Level 1\n#> Level 2\n```\n\n\n:::\n:::\n\n\n### But conditions can be muffled\n\nIf one wants to \"muffle\" the siginal, one needs to use `rlang::cnd_muffle()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Muffles the default handler which prints the messages\nwithCallingHandlers(\n message = function(cnd) {\n cat(\"Level 2\\n\")\n rlang::cnd_muffle(cnd)\n },\n withCallingHandlers(\n message = function(cnd) cat(\"Level 1\\n\"),\n message(\"Hello\")\n )\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Level 1\n#> Level 2\n```\n\n\n:::\n\n```{.r .cell-code}\n# Muffles level 2 handler and the default handler\nwithCallingHandlers(\n message = function(cnd) cat(\"Level 2\\n\"),\n withCallingHandlers(\n message = function(cnd) {\n cat(\"Level 1\\n\")\n rlang::cnd_muffle(cnd)\n },\n message(\"Hello\")\n )\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Level 1\n```\n\n\n:::\n:::\n\n\n### Call stacks\n\nCall stacks of exiting and calling handlers differ.\n\nWhy? \n\n> Calling handlers are called in the context of the call that signalled the condition\n> exiting handlers are called in the context of the call to tryCatch()\n\nTo see this, consider how the call stacks differ for a toy example.\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# create a function\nf <- function() g()\ng <- function() h()\nh <- function() message\n\n# call stack of calling handlers\nwithCallingHandlers(f(), message = function(cnd) {\n lobstr::cst()\n rlang::cnd_muffle(cnd)\n})\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (..., domain = NULL, appendLF = TRUE) \n#> {\n#> cond <- if (...length() == 1L && inherits(..1, \"condition\")) {\n#> if (nargs() > 1L) \n#> warning(\"additional arguments ignored in message()\")\n#> ..1\n#> }\n#> else {\n#> msg <- .makeMessage(..., domain = domain, appendLF = appendLF)\n#> call <- sys.call()\n#> simpleMessage(msg, call)\n#> }\n#> defaultHandler <- function(c) {\n#> cat(conditionMessage(c), file = stderr(), sep = \"\")\n#> }\n#> withRestarts({\n#> signalCondition(cond)\n#> defaultHandler(cond)\n#> }, muffleMessage = function() NULL)\n#> invisible()\n#> }\n#> <bytecode: 0x000001c80b980b98>\n#> <environment: namespace:base>\n```\n\n\n:::\n\n```{.r .cell-code}\n# call stack of exit handlers\ntryCatch(f(), message = function(cnd) lobstr::cst())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (..., domain = NULL, appendLF = TRUE) \n#> {\n#> cond <- if (...length() == 1L && inherits(..1, \"condition\")) {\n#> if (nargs() > 1L) \n#> warning(\"additional arguments ignored in message()\")\n#> ..1\n#> }\n#> else {\n#> msg <- .makeMessage(..., domain = domain, appendLF = appendLF)\n#> call <- sys.call()\n#> simpleMessage(msg, call)\n#> }\n#> defaultHandler <- function(c) {\n#> cat(conditionMessage(c), file = stderr(), sep = \"\")\n#> }\n#> withRestarts({\n#> signalCondition(cond)\n#> defaultHandler(cond)\n#> }, muffleMessage = function() NULL)\n#> invisible()\n#> }\n#> <bytecode: 0x000001c80b980b98>\n#> <environment: namespace:base>\n```\n\n\n:::\n\n```{.r .cell-code}\ntryCatch(f(), message = function(cnd) lobstr::cst())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (..., domain = NULL, appendLF = TRUE) \n#> {\n#> cond <- if (...length() == 1L && inherits(..1, \"condition\")) {\n#> if (nargs() > 1L) \n#> warning(\"additional arguments ignored in message()\")\n#> ..1\n#> }\n#> else {\n#> msg <- .makeMessage(..., domain = domain, appendLF = appendLF)\n#> call <- sys.call()\n#> simpleMessage(msg, call)\n#> }\n#> defaultHandler <- function(c) {\n#> cat(conditionMessage(c), file = stderr(), sep = \"\")\n#> }\n#> withRestarts({\n#> signalCondition(cond)\n#> defaultHandler(cond)\n#> }, muffleMessage = function() NULL)\n#> invisible()\n#> }\n#> <bytecode: 0x000001c80b980b98>\n#> <environment: namespace:base>\n```\n\n\n:::\n:::\n\n\n## Custom conditions\n\n### Motivation\n\nThe `base::log()` function provides a minimal error message.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlog(letters)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in log(letters): non-numeric argument to mathematical function\n```\n\n\n:::\n\n```{.r .cell-code}\nlog(1:10, base = letters)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in log(1:10, base = letters): non-numeric argument to mathematical function\n```\n\n\n:::\n:::\n\n\nOne could make a more informative error message about which argument is problematic.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmy_log <- function(x, base = exp(1)) {\n if (!is.numeric(x)) {\n rlang::abort(paste0(\n \"`x` must be a numeric vector; not \", typeof(x), \".\"\n ))\n }\n if (!is.numeric(base)) {\n rlang::abort(paste0(\n \"`base` must be a numeric vector; not \", typeof(base), \".\"\n ))\n }\n\n base::log(x, base = base)\n}\n```\n:::\n\n\nConsider the difference:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmy_log(letters)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in `my_log()`:\n#> ! `x` must be a numeric vector; not character.\n```\n\n\n:::\n\n```{.r .cell-code}\nmy_log(1:10, base = letters)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in `my_log()`:\n#> ! `base` must be a numeric vector; not character.\n```\n\n\n:::\n:::\n\n\n\n### Signalling\n\nCreate a helper function to describe errors:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nabort_bad_argument <- function(arg, must, not = NULL) {\n msg <- glue::glue(\"`{arg}` must {must}\")\n if (!is.null(not)) {\n not <- typeof(not)\n msg <- glue::glue(\"{msg}; not {not}.\")\n }\n \n rlang::abort(\n \"error_bad_argument\", # <- this is the (error) class, I believe\n message = msg, \n arg = arg, \n must = must, \n not = not\n )\n}\n```\n:::\n\n\nRewrite the log function to use this helper function:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmy_log <- function(x, base = exp(1)) {\n if (!is.numeric(x)) {\n abort_bad_argument(\"x\", must = \"be numeric\", not = x)\n }\n if (!is.numeric(base)) {\n abort_bad_argument(\"base\", must = \"be numeric\", not = base)\n }\n\n base::log(x, base = base)\n}\n```\n:::\n\n\nSee the result for the end user:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmy_log(letters)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in `abort_bad_argument()`:\n#> ! `x` must be numeric; not character.\n```\n\n\n:::\n\n```{.r .cell-code}\nmy_log(1:10, base = letters)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in `abort_bad_argument()`:\n#> ! `base` must be numeric; not character.\n```\n\n\n:::\n:::\n\n\n### Handling\n\nUse class of condition object to allow for different handling of different types of errors\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntryCatch(\n error_bad_argument = function(cnd) \"bad_argument\",\n error = function(cnd) \"other error\",\n my_log(\"a\")\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"bad_argument\"\n```\n\n\n:::\n:::\n\n\nBut note that the first handler that matches any of the signal's class, potentially in a vector of signal classes, will get control. So put the most specific handlers first.\n\n## Applications\n\nSee [the sub-section in the book](https://adv-r.hadley.nz/conditions.html#condition-applications) for excellent examples.\n\n## Resources\n\n- Conditions articles in rlang vignettes: \n - [Including function calls in error messages](https://rlang.r-lib.org/reference/topic-error-call.html)\n - [Including contextual information with error chains](https://rlang.r-lib.org/reference/topic-error-chaining.html)\n - [Formatting messages with cli](https://rlang.r-lib.org/reference/topic-condition-formatting.html)\n- [Other resources](https://github.com/rstudio-conf-2022/pkg-dev-masterclass/blob/main/materials/5-error-resources.md) from error message segment of rstudio::conf(2022) workshop \"Package Development Masterclass\"\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/mwiNe083DLU\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/ZFUr7YRSu2o\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/UZhrsVz6wi0\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<iframe src=\"https://www.youtube.com/embed/Wt7p71_BuYY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/WinIo5mrUZo\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/VFs-2sl5C70\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/VwmrbPUQY1k\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:19:16\tTrevin:\thttps://style.tidyverse.org/error-messages.html\n00:20:14\tTrevin:\tMore on errors in the design guide: https://design.tidyverse.org/\n01:14:27\tFederica Gazzelloni:\tmore info here: https://colinfay.me/learn-shiny-production/\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/t1N6XdidvNo\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:34:09\tRon:\tSomeone did: https://cran.r-project.org/web/packages/comprehenr/vignettes/Introduction.html\n00:47:58\tcollinberke:\thttps://purrr.tidyverse.org/reference/safely.html\n00:48:24\tRon:\tit's a function operator !\n00:49:37\tRon:\t\\(x) length(unique(x) is not too verbose though\n00:49:39\tRon:\t;)\n01:06:50\tcollinberke:\thttps://colinfay.me/purrr-mappers/\n01:07:45\tcollinberke:\thttps://colinfay.me/purrr-web-mining/\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Functionals\n---\n\n## Learning objectives:\n\n- Define functionals.\n- Use the `purrr::map()` family of functionals.\n- Use the `purrr::walk()` family of functionals.\n- Use the `purrr::reduce()` and `purrr::accumulate()` family of functionals.\n- Use `purrr::safely()` and `purrr::possibly()` to deal with failure.\n\n9.1. **Introduction**\n\n9.2. **map()**\n\n9.3. **purrr** style\n\n9.4. **map_** variants\n\n9.5. **reduce()** and **accumulate** family of functions\n\n- Some functions that weren't covered\n\n\n## What are functionals {-}\n\n## Introduction \n\n__Functionals__ are functions that take function as input and return a vector as output. Functionals that you probably have used before are: `apply()`, `lapply()` or `tapply()`. \n\n\n- alternatives to loops\n\n- a functional is better than a `for` loop is better than `while` is better than `repeat`\n\n\n### Benefits {-}\n\n\n- encourages function logic to be separated from iteration logic\n\n- can collapse into vectors/data frames easily\n\n\n## Map\n\n`map()` has two arguments, a vector and a function. It performs the function on each element of the vector and returns a list. We can also pass in some additional argument into the function.\n\n\n::: {.cell}\n::: {.cell-output-display}\n{width=448}\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsimple_map <- function(x, f, ...) {\nout <- vector(\"list\", length(x))\nfor (i in seq_along(x)) {\nout[[i]] <- f(x[[i]], ...)\n}\nout\n}\n```\n:::\n\n\n## Benefit of using the map function in purrr {-}\n\n- `purrr::map()` is equivalent to `lapply()`\n\n- returns a list and is the most general\n\n- the length of the input == the length of the output\n\n- `map()` is more flexible, with additional arguments allowed\n\n- `map()` has a host of extensions\n\n\n\n\n::: {.cell}\n\n:::\n\n\n## Atomic vectors {-}\n\n\n- has 4 variants to return atomic vectors\n - `map_chr()`\n - `map_dbl()`\n - `map_int()`\n - `map_lgl()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntriple <- function(x) x * 3\nmap(.x=1:3, .f=triple)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] 3\n#> \n#> [[2]]\n#> [1] 6\n#> \n#> [[3]]\n#> [1] 9\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_dbl(.x=1:3, .f=triple)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 3 6 9\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_lgl(.x=c(1, NA, 3), .f=is.na)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] FALSE TRUE FALSE\n```\n\n\n:::\n:::\n\n\n## Anonymous functions and shortcuts {-}\n\n **Anonymous functions** \n\n::: {.cell}\n\n```{.r .cell-code}\nmap_dbl(.x=mtcars, .f=function(x) mean(x, na.rm = TRUE)) |> \n head()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt \n#> 20.090625 6.187500 230.721875 146.687500 3.596563 3.217250\n```\n\n\n:::\n:::\n\n\n- the \"twiddle\" uses a twiddle `~` to set a formula\n- can use `.x` to reference the input `map(.x = ..., .f = )`\n\n::: {.cell}\n\n```{.r .cell-code}\nmap_dbl(.x=mtcars, .f=~mean(.x, na.rm = TRUE))\n```\n:::\n\n\n- can be simplified further as\n\n::: {.cell}\n\n```{.r .cell-code}\nmap_dbl(.x=mtcars, .f=mean, na.rm = TRUE)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt qsec \n#> 20.090625 6.187500 230.721875 146.687500 3.596563 3.217250 17.848750 \n#> vs am gear carb \n#> 0.437500 0.406250 3.687500 2.812500\n```\n\n\n:::\n:::\n\n\n- what happens when we try a handful of variants of the task at hand? (how many unique values are there for each variable?)\n\nNote that `.x` is the **name** of the first argument in `map()` (`.f` is the name of the second argument).\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# the task\nmap_dbl(mtcars, function(x) length(unique(x)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt qsec vs am gear carb \n#> 25 3 27 22 22 29 30 2 2 3 6\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_dbl(mtcars, function(unicorn) length(unique(unicorn)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt qsec vs am gear carb \n#> 25 3 27 22 22 29 30 2 2 3 6\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_dbl(mtcars, ~length(unique(.x)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt qsec vs am gear carb \n#> 25 3 27 22 22 29 30 2 2 3 6\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_dbl(mtcars, ~length(unique(..1)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt qsec vs am gear carb \n#> 25 3 27 22 22 29 30 2 2 3 6\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_dbl(mtcars, ~length(unique(.)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt qsec vs am gear carb \n#> 25 3 27 22 22 29 30 2 2 3 6\n```\n\n\n:::\n\n```{.r .cell-code}\n# not the task\nmap_dbl(mtcars, length)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt qsec vs am gear carb \n#> 32 32 32 32 32 32 32 32 32 32 32\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_dbl(mtcars, length(unique))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt qsec vs am gear carb \n#> 21.00 6.00 160.00 110.00 3.90 2.62 16.46 0.00 1.00 4.00 4.00\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_dbl(mtcars, 1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt qsec vs am gear carb \n#> 21.00 6.00 160.00 110.00 3.90 2.62 16.46 0.00 1.00 4.00 4.00\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\n#error\nmap_dbl(mtcars, length(unique()))\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in unique.default(): argument \"x\" is missing, with no default\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_dbl(mtcars, ~length(unique(x)))\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in `map_dbl()`:\n#> ℹ In index: 1.\n#> ℹ With name: mpg.\n#> Caused by error in `.f()`:\n#> ! object 'x' not found\n```\n\n\n:::\n:::\n\n\n\n## Modify {-}\n\nSometimes we might want the output to be the same as the input, then in that case we can use the modify function rather than map\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf <- data.frame(x=1:3,y=6:4)\n\nmap(df, .f=~.x*3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $x\n#> [1] 3 6 9\n#> \n#> $y\n#> [1] 18 15 12\n```\n\n\n:::\n\n```{.r .cell-code}\nmodify(.x=df,.f=~.x*3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x y\n#> 1 3 18\n#> 2 6 15\n#> 3 9 12\n```\n\n\n:::\n:::\n\n\nNote that `modify()` always returns the same type of output (which is not necessarily true with `map()`). Additionally, `modify()` does not actually change the value of `df`.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x y\n#> 1 1 6\n#> 2 2 5\n#> 3 3 4\n```\n\n\n:::\n:::\n\n\n\n## `purrr` style\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmtcars |> \n map(head, 20) |> # pull first 20 of each column\n map_dbl(mean) |> # mean of each vector\n head()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt \n#> 20.13000 6.20000 233.93000 136.20000 3.54500 3.39845\n```\n\n\n:::\n:::\n\n\nAn example from `tidytuesday`\n\n::: {.cell}\n\n```{.r .cell-code}\ntt <- tidytuesdayR::tt_load(\"2020-06-30\")\n\n# filter data & exclude columns with lost of nulls\nlist_df <- \n map(\n .x = tt[1:3], \n .f = \n ~ .x |> \n filter(issue <= 152 | issue > 200) |> \n mutate(timeframe = ifelse(issue <= 152, \"first 5 years\", \"last 5 years\")) |> \n select_if(~mean(is.na(.x)) < 0.2) \n )\n\n\n# write to global environment\niwalk(\n .x = list_df,\n .f = ~ assign(x = .y, value = .x, envir = globalenv())\n)\n```\n:::\n\n\n## `map_*()` variants \n\nThere are many variants\n\n\n\n\n## `map2_*()` {-}\n\n- raise each value `.x` by 2\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmap_dbl(\n .x = 1:5, \n .f = function(x) x ^ 2\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 4 9 16 25\n```\n\n\n:::\n:::\n\n\n- raise each value `.x` by another value `.y`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmap2_dbl(\n .x = 1:5, \n .y = 2:6, \n .f = ~ (.x ^ .y)\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 8 81 1024 15625\n```\n\n\n:::\n:::\n\n\n\n## The benefit of using the map over apply family of function {-}\n- It is written in C\n- It preserves names\n- We always know the return value type\n- We can apply the function for multiple input values\n- We can pass additional arguments into the function\n\n\n## `walk()` {-}\n\n\n- We use `walk()` when we want to call a function for it side effect(s) rather than its return value, like generating plots, `write.csv()`, or `ggsave()`. If you don't want a return value, `map()` will print more info than you may want.\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmap(1:3, ~cat(.x, \"\\n\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 1 \n#> 2 \n#> 3\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> NULL\n#> \n#> [[2]]\n#> NULL\n#> \n#> [[3]]\n#> NULL\n```\n\n\n:::\n:::\n\n\n- for these cases, use `walk()` instead\n\n::: {.cell}\n\n```{.r .cell-code}\nwalk(1:3, ~cat(.x, \"\\n\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 1 \n#> 2 \n#> 3\n```\n\n\n:::\n:::\n\n\n`cat()` does have a result, it's just usually returned invisibly.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncat(\"hello\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> hello\n```\n\n\n:::\n\n```{.r .cell-code}\n(cat(\"hello\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> hello\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> NULL\n```\n\n\n:::\n:::\n\n\n\nWe can use `pwalk()` to save a list of plot to disk. Note that the \"p\" in `pwalk()` means that we have more than 1 (or 2) variables to pipe into the function. Also note that the name of the first argument in all of the \"p\" functions is now `.l` (instead of `.x`).\n\n\n::: {.cell}\n\n```{.r .cell-code}\nplots <- mtcars |> \n split(mtcars$cyl) |> \n map(~ggplot(.x, aes(mpg,wt)) +\n geom_point())\n\npaths <- stringr::str_c(names(plots), '.png')\n\npwalk(.l = list(paths,plots), .f = ggsave, path = tempdir())\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Saving 7 x 5 in image\n#> Saving 7 x 5 in image\n#> Saving 7 x 5 in image\n```\n\n\n:::\n\n```{.r .cell-code}\npmap(.l = list(paths,plots), .f = ggsave, path = tempdir())\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Saving 7 x 5 in image\n#> Saving 7 x 5 in image\n#> Saving 7 x 5 in image\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] \"C:\\\\Users\\\\jonth\\\\AppData\\\\Local\\\\Temp\\\\RtmpcH2AWr/4.png\"\n#> \n#> [[2]]\n#> [1] \"C:\\\\Users\\\\jonth\\\\AppData\\\\Local\\\\Temp\\\\RtmpcH2AWr/6.png\"\n#> \n#> [[3]]\n#> [1] \"C:\\\\Users\\\\jonth\\\\AppData\\\\Local\\\\Temp\\\\RtmpcH2AWr/8.png\"\n```\n\n\n:::\n:::\n\n\n- walk, walk2 and pwalk all invisibly return .x the first argument. This makes them suitable for use in the middle of pipelines.\n\n- note: I don't think that it is \"`.x`\" (or \"`.l`\") that they are returning invisibly. But I'm not sure what it is. Hadley says:\n\n> purrr provides the walk family of functions that ignore the return values of the `.f` and instead return `.x` invisibly.\n\nBut not in the first `cat()` example, it is the `NULL` values that get returned invisibly (those aren't the same as `.x`).\n\n## `imap()` {-}\n\n- `imap()` is like `map2()`except that `.y` is derived from `names(.x)` if named or `seq_along(.x)` if not.\n\n- These two produce the same result\n\n\n::: {.cell}\n\n```{.r .cell-code}\nimap_chr(.x = mtcars, \n .f = ~ paste(.y, \"has a mean of\", round(mean(.x), 1))) |> \nhead()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl \n#> \"mpg has a mean of 20.1\" \"cyl has a mean of 6.2\" \n#> disp hp \n#> \"disp has a mean of 230.7\" \"hp has a mean of 146.7\" \n#> drat wt \n#> \"drat has a mean of 3.6\" \"wt has a mean of 3.2\"\n```\n\n\n:::\n\n```{.r .cell-code}\nmap2_chr(.x = mtcars, \n .y = names(mtcars),\n .f = ~ paste(.y, \"has a mean of\", round(mean(.x), 1))) |> \nhead()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl \n#> \"mpg has a mean of 20.1\" \"cyl has a mean of 6.2\" \n#> disp hp \n#> \"disp has a mean of 230.7\" \"hp has a mean of 146.7\" \n#> drat wt \n#> \"drat has a mean of 3.6\" \"wt has a mean of 3.2\"\n```\n\n\n:::\n:::\n\n\n\n## `pmap()` {-}\n\n- you can pass a named list or dataframe as arguments to a function\n\n- for example `runif()` has the parameters `n`, `min` and `max`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nparams <- tibble::tribble(\n ~ n, ~ min, ~ max,\n 1L, 1, 10,\n 2L, 10, 100,\n 3L, 100, 1000\n)\n\npmap(params, runif)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] 3.436116\n#> \n#> [[2]]\n#> [1] 14.32734 25.54193\n#> \n#> [[3]]\n#> [1] 515.0551 359.4206 565.1489\n```\n\n\n:::\n:::\n\n\n- could also be\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlist(\n n = 1:3, \n min = 10 ^ (0:2), \n max = 10 ^ (1:3)\n) |> \npmap(runif)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] 1.099975\n#> \n#> [[2]]\n#> [1] 29.59029 39.59901\n#> \n#> [[3]]\n#> [1] 675.4716 229.3796 538.4306\n```\n\n\n:::\n:::\n\n\n- I like to use `expand_grid()` when I want all possible parameter combinations.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nexpand_grid(n = 1:3,\n min = 10 ^ (0:1),\n max = 10 ^ (1:2))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 12 × 3\n#> n min max\n#> <int> <dbl> <dbl>\n#> 1 1 1 10\n#> 2 1 1 100\n#> 3 1 10 10\n#> 4 1 10 100\n#> 5 2 1 10\n#> 6 2 1 100\n#> 7 2 10 10\n#> 8 2 10 100\n#> 9 3 1 10\n#> 10 3 1 100\n#> 11 3 10 10\n#> 12 3 10 100\n```\n\n\n:::\n\n```{.r .cell-code}\nexpand_grid(n = 1:3,\n min = 10 ^ (0:1),\n max = 10 ^ (1:2)) |> \npmap(runif)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] 6.885943\n#> \n#> [[2]]\n#> [1] 6.636844\n#> \n#> [[3]]\n#> [1] 10\n#> \n#> [[4]]\n#> [1] 71.0812\n#> \n#> [[5]]\n#> [1] 9.260550 8.135717\n#> \n#> [[6]]\n#> [1] 62.45852 30.95404\n#> \n#> [[7]]\n#> [1] 10 10\n#> \n#> [[8]]\n#> [1] 64.86900 49.33175\n#> \n#> [[9]]\n#> [1] 3.953245 7.092795 2.996488\n#> \n#> [[10]]\n#> [1] 68.47693 78.00939 21.72014\n#> \n#> [[11]]\n#> [1] 10 10 10\n#> \n#> [[12]]\n#> [1] 39.80917 28.25112 93.72982\n```\n\n\n:::\n:::\n\n\n\n\n## `reduce()` family\n\nThe `reduce()` function is a powerful functional that allows you to abstract away from a sequence of functions that are applied in a fixed direction.\n\n`reduce()` takes a vector as its first argument, a function as its second argument, and an optional `.init` argument last. It will then apply the function repeatedly to the vector until there is only a single element left.\n\n(Hint: start at the top of the image and read down.)\n\n\n::: {.cell}\n::: {.cell-output-display}\n{width=508}\n:::\n:::\n\n\n\nLet me really quickly demonstrate `reduce()` in action.\n\nSay you wanted to add up the numbers 1 through 5 using only the plus operator `+`. You could do something like:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n1 + 2 + 3 + 4 + 5\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 15\n```\n\n\n:::\n:::\n\n\nWhich is the same as:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nreduce(1:5, `+`)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 15\n```\n\n\n:::\n:::\n\n\nAnd if you want the start value to be something that is not the first argument of the vector, pass that value to the .init argument:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nidentical(\n 0.5 + 1 + 2 + 3 + 4 + 5,\n reduce(1:5, `+`, .init = 0.5)\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n## ggplot2 example with reduce {-}\n\n\n::: {.cell}\n\n```{.r .cell-code}\nggplot(mtcars, aes(hp, mpg)) + \n geom_point(size = 8, alpha = .5, color = \"yellow\") +\n geom_point(size = 4, alpha = .5, color = \"red\") +\n geom_point(size = 2, alpha = .5, color = \"blue\")\n```\n\n::: {.cell-output-display}\n{width=672}\n:::\n:::\n\n\nLet us use the `reduce()` function. Note that `reduce2()` takes two arguments, but the first value (`..1`) is given by the `.init` value.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nreduce2(\n c(8, 4, 2),\n c(\"yellow\", \"red\", \"blue\"),\n ~ ..1 + geom_point(size = ..2, alpha = .5, color = ..3),\n .init = ggplot(mtcars, aes(hp, mpg))\n)\n```\n\n::: {.cell-output-display}\n{width=672}\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf <- list(age=tibble(name='john',age=30),\n sex=tibble(name=c('john','mary'),sex=c('M','F'),\n trt=tibble(name='Mary',treatment='A')))\n\ndf\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $age\n#> # A tibble: 1 × 2\n#> name age\n#> <chr> <dbl>\n#> 1 john 30\n#> \n#> $sex\n#> # A tibble: 2 × 3\n#> name sex trt$name $treatment\n#> <chr> <chr> <chr> <chr> \n#> 1 john M Mary A \n#> 2 mary F Mary A\n```\n\n\n:::\n\n```{.r .cell-code}\ndf |> reduce(.f = full_join)\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Joining with `by = join_by(name)`\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 4\n#> name age sex trt$name $treatment\n#> <chr> <dbl> <chr> <chr> <chr> \n#> 1 john 30 M Mary A \n#> 2 mary NA F Mary A\n```\n\n\n:::\n\n```{.r .cell-code}\nreduce(.x = df,.f = full_join)\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Joining with `by = join_by(name)`\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 4\n#> name age sex trt$name $treatment\n#> <chr> <dbl> <chr> <chr> <chr> \n#> 1 john 30 M Mary A \n#> 2 mary NA F Mary A\n```\n\n\n:::\n:::\n\n\n- to see all intermediate steps, use **accumulate()**\n\n\n::: {.cell}\n\n```{.r .cell-code}\nset.seed(1234)\naccumulate(1:5, `+`)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 3 6 10 15\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\naccumulate2(\n c(8, 4, 2),\n c(\"yellow\", \"red\", \"blue\"),\n ~ ..1 + geom_point(size = ..2, alpha = .5, color = ..3),\n .init = ggplot(mtcars, aes(hp, mpg))\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n```\n\n\n:::\n\n::: {.cell-output-display}\n{width=672}\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> \n#> [[2]]\n```\n\n\n:::\n\n::: {.cell-output-display}\n{width=672}\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> \n#> [[3]]\n```\n\n\n:::\n\n::: {.cell-output-display}\n{width=672}\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> \n#> [[4]]\n```\n\n\n:::\n\n::: {.cell-output-display}\n{width=672}\n:::\n:::\n\n\n\n## `map_df*()` variants {-}\n\n- `map_dfr()` = row bind the results\n\n- `map_dfc()` = column bind the results\n\n- Note that `map_dfr()` has been superseded by `map() |> list_rbind()` and `map_dfc()` has been superseded by `map() |> list_cbind()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncol_stats <- function(n) {\n head(mtcars, n) |> \n summarise_all(mean) |> \n mutate_all(floor) |> \n mutate(n = paste(\"N =\", n))\n}\n\nmap((1:2) * 10, col_stats)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> mpg cyl disp hp drat wt qsec vs am gear carb n\n#> 1 20 5 208 122 3 3 18 0 0 3 2 N = 10\n#> \n#> [[2]]\n#> mpg cyl disp hp drat wt qsec vs am gear carb n\n#> 1 20 6 233 136 3 3 18 0 0 3 2 N = 20\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_dfr((1:2) * 10, col_stats)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt qsec vs am gear carb n\n#> 1 20 5 208 122 3 3 18 0 0 3 2 N = 10\n#> 2 20 6 233 136 3 3 18 0 0 3 2 N = 20\n```\n\n\n:::\n\n```{.r .cell-code}\nmap((1:2) * 10, col_stats) |> list_rbind()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp drat wt qsec vs am gear carb n\n#> 1 20 5 208 122 3 3 18 0 0 3 2 N = 10\n#> 2 20 6 233 136 3 3 18 0 0 3 2 N = 20\n```\n\n\n:::\n:::\n\n\n---\n\n## `pluck()` {-}\n\n- `pluck()` will pull a single element from a list\n\nI like the example from the book because the starting object is not particularly easy to work with (as many JSON objects might not be).\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmy_list <- list(\n list(-1, x = 1, y = c(2), z = \"a\"),\n list(-2, x = 4, y = c(5, 6), z = \"b\"),\n list(-3, x = 8, y = c(9, 10, 11))\n)\nmy_list\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [[1]][[1]]\n#> [1] -1\n#> \n#> [[1]]$x\n#> [1] 1\n#> \n#> [[1]]$y\n#> [1] 2\n#> \n#> [[1]]$z\n#> [1] \"a\"\n#> \n#> \n#> [[2]]\n#> [[2]][[1]]\n#> [1] -2\n#> \n#> [[2]]$x\n#> [1] 4\n#> \n#> [[2]]$y\n#> [1] 5 6\n#> \n#> [[2]]$z\n#> [1] \"b\"\n#> \n#> \n#> [[3]]\n#> [[3]][[1]]\n#> [1] -3\n#> \n#> [[3]]$x\n#> [1] 8\n#> \n#> [[3]]$y\n#> [1] 9 10 11\n```\n\n\n:::\n:::\n\n\nNotice that the \"first element\" means something different in standard `pluck()` versus `map`ped `pluck()`.\n\n\n::: {.cell}\n\n```{.r .cell-code}\npluck(my_list, 1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] -1\n#> \n#> $x\n#> [1] 1\n#> \n#> $y\n#> [1] 2\n#> \n#> $z\n#> [1] \"a\"\n```\n\n\n:::\n\n```{.r .cell-code}\nmap(my_list, pluck, 1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] -1\n#> \n#> [[2]]\n#> [1] -2\n#> \n#> [[3]]\n#> [1] -3\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_dbl(my_list, pluck, 1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] -1 -2 -3\n```\n\n\n:::\n:::\n\n\nThe `map()` functions also have shortcuts for extracting elements from vectors (powered by `purrr::pluck()`). Note that `map(my_list, 3)` is a shortcut for `map(my_list, pluck, 3)`.\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Select by name\nmap_dbl(my_list, \"x\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 4 8\n```\n\n\n:::\n\n```{.r .cell-code}\n# Or by position\nmap_dbl(my_list, 1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] -1 -2 -3\n```\n\n\n:::\n\n```{.r .cell-code}\n# Or by both\nmap_dbl(my_list, list(\"y\", 1))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2 5 9\n```\n\n\n:::\n\n```{.r .cell-code}\n# You'll get an error if you try to retrieve an inside item that doesn't have \n# a consistent format and you want a numeric output\nmap_dbl(my_list, list(\"y\"))\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in `map_dbl()`:\n#> ℹ In index: 2.\n#> Caused by error:\n#> ! Result must be length 1, not 2.\n```\n\n\n:::\n\n```{.r .cell-code}\n# You'll get an error if a component doesn't exist:\nmap_chr(my_list, \"z\")\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in `map_chr()`:\n#> ℹ In index: 3.\n#> Caused by error:\n#> ! Result must be length 1, not 0.\n```\n\n\n:::\n\n```{.r .cell-code}\n#> Error: Result 3 must be a single string, not NULL of length 0\n\n# Unless you supply a .default value\nmap_chr(my_list, \"z\", .default = NA)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"a\" \"b\" NA\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] \"a\" \"b\" NA\n```\n:::\n\n\n\n## Not covered: `flatten()` {-}\n\n- `flatten()` will turn a list of lists into a simpler vector.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmy_list <-\n list(\n a = 1:3,\n b = list(1:3)\n )\n\nmy_list\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $a\n#> [1] 1 2 3\n#> \n#> $b\n#> $b[[1]]\n#> [1] 1 2 3\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_if(my_list, is.list, pluck)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $a\n#> [1] 1 2 3\n#> \n#> $b\n#> $b[[1]]\n#> [1] 1 2 3\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_if(my_list, is.list, flatten_int)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $a\n#> [1] 1 2 3\n#> \n#> $b\n#> [1] 1 2 3\n```\n\n\n:::\n\n```{.r .cell-code}\nmap_if(my_list, is.list, flatten_int) |> \n flatten_int()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 2 3 1 2 3\n```\n\n\n:::\n:::\n\n\n## Dealing with Failures {-}\n\n## Safely {-}\n\n`safely()` is an adverb. It takes a function (a verb) and returns a modified version. In this case, the modified function will never throw an error. Instead it always returns a list with two elements.\n\n- `result` is the original result. If there is an error this will be NULL\n\n- `error` is an error object. If the operation was successful the \"`error`\" will be NULL.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nA <- list(1, 10, \"a\")\n\nmap(.x = A, .f = safely(log))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [[1]]$result\n#> [1] 0\n#> \n#> [[1]]$error\n#> NULL\n#> \n#> \n#> [[2]]\n#> [[2]]$result\n#> [1] 2.302585\n#> \n#> [[2]]$error\n#> NULL\n#> \n#> \n#> [[3]]\n#> [[3]]$result\n#> NULL\n#> \n#> [[3]]$error\n#> <simpleError in .Primitive(\"log\")(x, base): non-numeric argument to mathematical function>\n```\n\n\n:::\n:::\n\n\n## Possibly {-}\n\n`possibly()` always succeeds. It is simpler than `safely()`, because you can give it a default value to return when there is an error.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nA <- list(1,10,\"a\")\n\nmap_dbl(.x = A, .f = possibly(log, otherwise = NA_real_) )\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 0.000000 2.302585 NA\n```\n\n\n:::\n:::\n\n\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/o0a6aJ4kCkU\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/YrZ13_4vUMw\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/DUHXo527mHs\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/SpDpmhW62Ns\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/tYqFMtmhmiI\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/HmDlvnp6uNQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:15:49\tMatt Dupree:\tdid anyone else lose audio?\n00:15:59\tFederica Gazzelloni:\tnot me\n00:16:02\tArthur Shaw:\tNot me either\n00:16:04\tTrevin:\tokay for me\n00:16:27\tMatt Dupree:\tgonna try rejoining\n00:43:14\tMatt Dupree:\toh i didn't know they invisibly returned .x! That's useful!\n00:48:29\tArthur Shaw:\tVery cool trick !\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/t1N6XdidvNo\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:34:09\tRon:\tSomeone did: https://cran.r-project.org/web/packages/comprehenr/vignettes/Introduction.html\n00:47:58\tcollinberke:\thttps://purrr.tidyverse.org/reference/safely.html\n00:48:24\tRon:\tit's a function operator !\n00:49:37\tRon:\t\\(x) length(unique(x) is not too verbose though\n00:49:39\tRon:\t;)\n01:06:50\tcollinberke:\thttps://colinfay.me/purrr-mappers/\n01:07:45\tcollinberke:\thttps://colinfay.me/purrr-web-mining/\n```\n</details>\n\n<iframe src=\"https://www.youtube.com/embed/6gY3KZWYC00\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Function factories\n---\n\n## Learning objectives:\n\n- Understand what a function factory is\n- Recognise how function factories work\n- Learn about non-obvious combination of function features\n- Generate a family of functions from data\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(rlang)\nlibrary(ggplot2)\nlibrary(scales)\n```\n:::\n\n\n\n## What is a function factory?\n\n\nA **function factory** is a function that makes (returns) functions\n\nFactory made function are **manufactured functions**.\n\n\n::: {.cell layout-align=\"center\"}\n::: {.cell-output-display}\n{fig-align='center' fig-alt='https://epsis.com/no/operations-centers-focus-on-ways-of-working/' width=512}\n:::\n:::\n\n\n\n\n## How does a function factory work?\n\n::: {.cell layout-align=\"center\"}\n::: {.cell-output-display}\n{fig-align='center' width=130}\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\npower1 <- function(exp) {\n function(x) {\n x ^ exp\n }\n}\n\nsquare <- power1(2)\ncube <- power1(3)\n```\n:::\n\n`power1()` is the function factory and `square()` and `cube()` are manufactured functions.\n\n## Important to remember\n\n1. R has First-class functions (can be created with `function()` and `<-`)\n\n> R functions are objects in their own right, a language property often called “first-class functions” \n> -- [Section 6.2.3](https://adv-r.hadley.nz/functions.html?q=first%20class#first-class-functions)\n\n2. Functions capture (enclose) environment in which they are created\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf <- function(x) function(y) x + y\nfn_env(f) # The function f()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: R_GlobalEnv>\n```\n\n\n:::\n\n```{.r .cell-code}\nfn_env(f()) # The function created by f()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: 0x000001c9f325a8f8>\n```\n\n\n:::\n:::\n\n\n3. Functions create a new environment on each run\n\n::: {.cell}\n\n```{.r .cell-code}\nf <- function(x) {\n function() x + 1\n}\nff <- f(1)\nff()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2\n```\n\n\n:::\n\n```{.r .cell-code}\nff()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2\n```\n\n\n:::\n:::\n\n\n\n## Fundamentals - Environment\n\n- Environment when function is created defines arguments in the function\n- Use `env_print(fun)` and `fn_env()` to explore\n\n\n::: {.cell}\n\n```{.r .cell-code}\nenv_print(square)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: 0x000001c9f4370070>\n#> Parent: <environment: global>\n#> Bindings:\n#> • exp: <lazy>\n```\n\n\n:::\n\n```{.r .cell-code}\nfn_env(square)$exp\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2\n```\n\n\n:::\n:::\n\n\n{width=50% fig-align=center}\n\n## Fundamentals - Forcing\n\n- Lazy evaluation means arguments only evaluated when used\n- \"[can] lead to a real head-scratcher of a bug\"\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- 2\nsquare <- power1(x)\nx <- 3\nsquare(4)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 64\n```\n\n\n:::\n:::\n\n\n- *Only applies if passing object as argument*\n- Here argument `2` evaluated when function called\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsquare <- power1(2)\nx <- 3\nsquare(4)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 16\n```\n\n\n:::\n:::\n\n\nSo use `force()`! (Unless you want it to change with the `x` in the parent environment)\n\n## Forcing - Reiterated\n\nOnly required if the argument is **not** evaluated before the new function is created:\n\n::: {.cell}\n\n```{.r .cell-code}\npower1 <- function(exp) {\n stopifnot(is.numeric(exp))\n function(x) x ^ exp\n}\n\nx <- 2\nsquare <- power1(x)\nx <- 3\nsquare(4)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 16\n```\n\n\n:::\n:::\n\n\n## Fundamentals - Stateful functions\n\nBecause\n\n- The enclosing environment is unique and constant, and\n- We have `<<-` (super assignment)\n\nWe can *change* that enclosing environment and keep track of that state\nacross iterations (!)\n\n- `<-` Assignment in *current* environment\n- `<<-` Assignment in *parent* environment\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnew_counter <- function() {\n i <- 0 \n function() {\n i <<- i + 1 # second assignment (super assignment)\n i\n }\n}\n\ncounter_one <- new_counter()\ncounter_two <- new_counter()\nc(counter_one(), counter_one(), counter_one())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 2 3\n```\n\n\n:::\n\n```{.r .cell-code}\nc(counter_two(), counter_two(), counter_two())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 2 3\n```\n\n\n:::\n:::\n\n\n\n> \"As soon as your function starts managing the state of multiple variables, it’s better to switch to R6\"\n\n## Fundamentals - Garbage collection\n\n- Because environment is attached to (enclosed by) function, temporary objects\ndon't go away.\n\n**Cleaning up** using `rm()` inside a function:\n\n::: {.cell}\n\n```{.r .cell-code}\nf_dirty <- function(n) {\n x <- runif(n)\n m <- mean(x)\n function() m\n}\n\nf_clean <- function(n) {\n x <- runif(n)\n m <- mean(x)\n rm(x) # <---- Important part!\n function() m\n}\n\nlobstr::obj_size(f_dirty(1e6))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 8.00 MB\n```\n\n\n:::\n\n```{.r .cell-code}\nlobstr::obj_size(f_clean(1e6))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 504 B\n```\n\n\n:::\n:::\n\n\n\n## Useful Examples - Histograms and binwidth\n\n**Useful when...** \n\n- You need to pass a function \n- You don't want to have to re-write the function every time \n (the *default* behaviour of the function should be flexible)\n\n\nFor example, these bins are not appropriate\n\n::: {.cell}\n\n```{.r .cell-code}\nsd <- c(1, 5, 15)\nn <- 100\ndf <- data.frame(x = rnorm(3 * n, sd = sd), sd = rep(sd, n))\n\nggplot(df, aes(x)) + \n geom_histogram(binwidth = 2) + \n facet_wrap(~ sd, scales = \"free_x\") + \n labs(x = NULL)\n```\n\n::: {.cell-output-display}\n{width=672}\n:::\n:::\n\n\nWe could just make a function...\n\n::: {.cell}\n\n```{.r .cell-code}\nbinwidth_bins <- function(x) (max(x) - min(x)) / 20\n\nggplot(df, aes(x = x)) + \n geom_histogram(binwidth = binwidth_bins) + \n facet_wrap(~ sd, scales = \"free_x\") + \n labs(x = NULL)\n```\n\n::: {.cell-output-display}\n{width=672}\n:::\n:::\n\n\nBut if we want to change the number of bins (20) we'd have to re-write the function\neach time.\n\nIf we use a factory, we don't have to do that.\n\n::: {.cell}\n\n```{.r .cell-code}\nbinwidth_bins <- function(n) {\n force(n)\n function(x) (max(x) - min(x)) / n\n}\n\nggplot(df, aes(x = x)) + \n geom_histogram(binwidth = binwidth_bins(20)) + \n facet_wrap(~ sd, scales = \"free_x\") + \n labs(x = NULL, title = \"20 bins\")\n```\n\n::: {.cell-output-display}\n{width=672}\n:::\n\n```{.r .cell-code}\nggplot(df, aes(x = x)) + \n geom_histogram(binwidth = binwidth_bins(5)) + \n facet_wrap(~ sd, scales = \"free_x\") + \n labs(x = NULL, title = \"5 bins\")\n```\n\n::: {.cell-output-display}\n{width=672}\n:::\n:::\n\n\n> Similar benefit in Box-cox example\n\n## Useful Examples - Wrapper\n\n**Useful when...**\n\n- You want to create a function that wraps a bunch of other functions\n\nFor example, `ggsave()` wraps a bunch of different graphics device functions: \n\n\n::: {.cell}\n\n```{.r .cell-code}\n# (Even more simplified)\nplot_dev <- function(ext, dpi = 96) {\n force(dpi)\n \n switch(\n ext,\n svg = function(filename, ...) svglite::svglite(file = filename, ...),\n png = function(...) grDevices::png(..., res = dpi, units = \"in\"),\n jpg = ,\n jpeg = function(...) grDevices::jpeg(..., res = dpi, units = \"in\"),\n stop(\"Unknown graphics extension: \", ext, call. = FALSE)\n )\n}\n```\n:::\n\n\nThen `ggsave()` uses\n\n```\nggsave <- function(...) {\n dev <- plot_dev(device, filename, dpi = dpi)\n ...\n dev(filename = filename, width = dim[1], height = dim[2], bg = bg, ...)\n ...\n}\n```\n\nOtherwise, would have to do something like like a bunch of if/else statements.\n\n## Useful Examples - Optimizing\n\n**Useful when...**\n\n- Want to pass function on to `optimise()`/`optimize()`\n- Want to perform pre-computations to speed things up\n- Want to re-use this for other datasets\n\n(*Skipping to final results from section*)\n\nHere, using MLE want to to find the most likely value of lambda for a Poisson distribution\nand this data.\n\n::: {.cell}\n\n```{.r .cell-code}\nx1 <- c(41, 30, 31, 38, 29, 24, 30, 29, 31, 38)\n```\n:::\n\n\nWe'll create a function that creates a lambda assessment function for a given \ndata set.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nll_poisson <- function(x) {\n n <- length(x)\n sum_x <- sum(x)\n c <- sum(lfactorial(x))\n\n function(lambda) {\n log(lambda) * sum_x - n * lambda - c\n }\n}\n```\n:::\n\n\nWe can use this on different data sets, but here use ours `x1`\n\n::: {.cell}\n\n```{.r .cell-code}\nll <- ll_poisson(x1)\nll(10) # Log-probility of a lambda = 10\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] -183.6405\n```\n\n\n:::\n:::\n\n\nUse `optimise()` rather than trial and error\n\n::: {.cell}\n\n```{.r .cell-code}\noptimise(ll, c(0, 100), maximum = TRUE)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $maximum\n#> [1] 32.09999\n#> \n#> $objective\n#> [1] -30.26755\n```\n\n\n:::\n:::\n\n\nResult: Highest log-probability is -30.3, best lambda is 32.1\n\n\n## Function factories + functionals\n\nCombine functionals and function factories to turn data into many functions.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnames <- list(\n square = 2, \n cube = 3, \n root = 1/2, \n cuberoot = 1/3, \n reciprocal = -1\n)\nfuns <- purrr::map(names, power1)\nnames(funs)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"square\" \"cube\" \"root\" \"cuberoot\" \"reciprocal\"\n```\n\n\n:::\n\n```{.r .cell-code}\nfuns$root(64)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 8\n```\n\n\n:::\n\n```{.r .cell-code}\nfuns$square(3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 9\n```\n\n\n:::\n:::\n\n\nAvoid the prefix with\n\n- `with()` - `with(funs, root(100))`\n - Temporary, clear, short-term\n- `attach()` - `attach(funs)` / `detach(funs)`\n - Added to search path (like package function), cannot be overwritten, but can be attached multiple times!\n- `rlang::env_bind` - `env_bind(globalenv(), !!!funs)` / `env_unbind(gloablenv(), names(funs))`\n - Added to global env (like created function), can be overwritten\n\n<!--\n## EXTRA - Previous set of slides\n\nGraphical factories **useful function factories**, such as:\n\n1. Labelling with:\n\n * formatter functions\n \n\n::: {.cell}\n\n```{.r .cell-code}\ny <- c(12345, 123456, 1234567)\ncomma_format()(y)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"12,345\" \"123,456\" \"1,234,567\"\n```\n\n\n:::\n:::\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnumber_format(scale = 1e-3, suffix = \" K\")(y)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"12 K\" \"123 K\" \"1 235 K\"\n```\n\n\n:::\n:::\n\nThey are more commonly used inside a ggplot:\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\na_ggplot_object + \n scale_y_continuous(\n labels = comma_format()\n)\n```\n\n::: {.cell-output-display}\n{width=672}\n:::\n:::\n\n\n2. Using binwidth in facet histograms\n\n * binwidth_bins\n \n\n::: {.cell}\n\n```{.r .cell-code}\nbinwidth_bins <- function(n) {\n force(n)\n \n function(x) {\n (max(x) - min(x)) / n\n }\n}\n```\n:::\n\n \nOr use a concatenation of this typr of detecting number of bins functions:\n\n - nclass.Sturges()\n - nclass.scott()\n - nclass.FD()\n \n\n::: {.cell}\n\n```{.r .cell-code}\nbase_bins <- function(type) {\n fun <- switch(type,\n Sturges = nclass.Sturges,\n scott = nclass.scott,\n FD = nclass.FD,\n stop(\"Unknown type\", call. = FALSE)\n )\n \n function(x) {\n (max(x) - min(x)) / fun(x)\n }\n}\n```\n:::\n\n \n\n3. Internals:\n\n * ggplot2:::plot_dev()\n\n\n## Non-obvious combinations\n\n\n- The **Box-Cox** transformation.\n- **Bootstrap** resampling.\n- **Maximum likelihood** estimation.\n\n\n### Statistical factories\n\nThe **Box-Cox** transformation towards normality:\n\n::: {.cell}\n\n```{.r .cell-code}\nboxcox1 <- function(x, lambda) {\n stopifnot(length(lambda) == 1)\n \n if (lambda == 0) {\n log(x)\n } else {\n (x ^ lambda - 1) / lambda\n }\n}\n```\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nboxcox2 <- function(lambda) {\n if (lambda == 0) {\n function(x) log(x)\n } else {\n function(x) (x ^ lambda - 1) / lambda\n }\n}\n\nstat_boxcox <- function(lambda) {\n stat_function(aes(colour = lambda), fun = boxcox2(lambda), size = 1)\n}\n\nplot1 <- ggplot(data.frame(x = c(0, 5)), aes(x)) + \n lapply(c(0.5, 1, 1.5), stat_boxcox) + \n scale_colour_viridis_c(limits = c(0, 1.5))\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning: Using `size` aesthetic for lines was deprecated in ggplot2 3.4.0.\n#> ℹ Please use `linewidth` instead.\n```\n\n\n:::\n\n```{.r .cell-code}\n# visually, log() does seem to make sense as the transformation\n# for lambda = 0; as values get smaller and smaller, the function\n# gets close and closer to a log transformation\nplot2 <- ggplot(data.frame(x = c(0.01, 1)), aes(x)) + \n lapply(c(0.5, 0.25, 0.1, 0), stat_boxcox) + \n scale_colour_viridis_c(limits = c(0, 1.5))\nlibrary(patchwork)\nplot1+plot2\n```\n\n::: {.cell-output-display}\n{width=672}\n:::\n:::\n\n\n**Bootstrap generators**\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nboot_permute <- function(df, var) {\n n <- nrow(df)\n force(var)\n \n function() {\n col <- df[[var]]\n col[sample(n, replace = TRUE)]\n }\n}\n\nboot_mtcars1 <- boot_permute(mtcars, \"mpg\")\nhead(boot_mtcars1())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 30.4 16.4 15.8 14.7 10.4 21.4\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] 16.4 22.8 22.8 22.8 16.4 19.2\nhead(boot_mtcars1())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 32.4 26.0 17.3 13.3 26.0 18.1\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] 17.8 18.7 30.4 30.4 16.4 21.0\n```\n:::\n\n\n::: {.cell}\n\n```{.r .cell-code}\nboot_model <- function(df, formula) {\n mod <- lm(formula, data = df)\n fitted <- unname(fitted(mod))\n resid <- unname(resid(mod))\n rm(mod)\n\n function() {\n fitted + sample(resid)\n }\n} \n\nboot_mtcars2 <- boot_model(mtcars, mpg ~ wt)\nhead(boot_mtcars2())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 25.38590 24.26973 22.27495 20.96952 15.69478 19.96660\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] 25.0 24.0 21.7 19.2 24.9 16.0\nhead(boot_mtcars2())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 27.44635 23.66597 30.86703 18.21963 21.36451 15.06639\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] 27.4 21.0 20.3 19.4 16.3 21.3\n```\n:::\n\n\n**Maximum likelihood estimation**\n\n$$P(\\lambda,x)=\\prod_{i=1}^{n}\\frac{\\lambda^{x_i}e^{-\\lambda}}{x_i!}$$\n\n::: {.cell}\n\n```{.r .cell-code}\nlprob_poisson <- function(lambda, x) {\n n <- length(x)\n (log(lambda) * sum(x)) - (n * lambda) - sum(lfactorial(x))\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx1 <- c(41, 30, 31, 38, 29, 24, 30, 29, 31, 38)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlprob_poisson(10, x1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] -183.6405\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] -184\nlprob_poisson(20, x1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] -61.14028\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] -61.1\nlprob_poisson(30, x1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] -30.98598\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] -31\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nll_poisson1 <- function(x) {\n n <- length(x)\n\n function(lambda) {\n log(lambda) * sum(x) - n * lambda - sum(lfactorial(x))\n }\n}\n```\n:::\n\n\n::: {.cell}\n\n```{.r .cell-code}\nll_poisson2 <- function(x) {\n n <- length(x)\n sum_x <- sum(x)\n c <- sum(lfactorial(x))\n\n function(lambda) {\n log(lambda) * sum_x - n * lambda - c\n }\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nll1 <- ll_poisson2(x1)\n\nll1(10)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] -183.6405\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] -184\nll1(20)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] -61.14028\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] -61.1\nll1(30)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] -30.98598\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] -31\n```\n:::\n\n\n::: {.cell}\n\n```{.r .cell-code}\noptimise(ll1, c(0, 100), maximum = TRUE)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $maximum\n#> [1] 32.09999\n#> \n#> $objective\n#> [1] -30.26755\n```\n\n\n:::\n\n```{.r .cell-code}\n#> $maximum\n#> [1] 32.1\n#> \n#> $objective\n#> [1] -30.3\n```\n:::\n\n\n::: {.cell}\n\n```{.r .cell-code}\noptimise(lprob_poisson, c(0, 100), x = x1, maximum = TRUE)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $maximum\n#> [1] 32.09999\n#> \n#> $objective\n#> [1] -30.26755\n```\n\n\n:::\n\n```{.r .cell-code}\n#> $maximum\n#> [1] 32.1\n#> \n#> $objective\n#> [1] -30.3\n```\n:::\n\n\n## Function factory applications\n\n\nCombine functionals and function factories to turn data into many functions.\n\n### Function factories + functionals\n\n::: {.cell}\n\n```{.r .cell-code}\nnames <- list(\n square = 2, \n cube = 3, \n root = 1/2, \n cuberoot = 1/3, \n reciprocal = -1\n)\nfuns <- purrr::map(names, power1)\n\nfuns$root(64)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 8\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] 8\nfuns$root\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (x) \n#> x^exp\n#> <bytecode: 0x000001c9f32287e8>\n#> <environment: 0x000001c9f4276658>\n```\n\n\n:::\n\n```{.r .cell-code}\n#> function(x) {\n#> x ^ exp\n#> }\n#> <bytecode: 0x7fe85512a410>\n#> <environment: 0x7fe85b21f190>\n```\n:::\n\n\n::: {.cell}\n\n```{.r .cell-code}\nwith(funs, root(100))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 10\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] 10\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nattach(funs)\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> The following objects are masked _by_ .GlobalEnv:\n#> \n#> cube, square\n```\n\n\n:::\n\n```{.r .cell-code}\n#> The following objects are masked _by_ .GlobalEnv:\n#> \n#> cube, square\nroot(100)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 10\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] 10\ndetach(funs)\n```\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nrlang::env_bind(globalenv(), !!!funs)\nroot(100)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 10\n```\n\n\n:::\n\n```{.r .cell-code}\n#> [1] 10\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nrlang::env_unbind(globalenv(), names(funs))\n```\n:::\n\n\n\n-->\n\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/enI5Ynq6olI\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/U-CoF7MCik0\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/qgn7WTITnNs\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/GHp2W4JxVaY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/8TGXjzi0n0o\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/FUoYwYFqT7Q\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n01:02:25\tTrevin:\tI'm good with combining 👍\n01:02:57\tOluwafemi Oyedele:\tI agree with combining the chapter!!!\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/7GLyO3IntgE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Function operators\n---\n\n## Learning objectives:\n\n- Define function operator\n- Explore some existing function operators\n- Make our own function operator\n\n\n\n## Introduction \n\n<!--- ```{r 10-01, fig.align='center',fig.dim=\"50%\", fig.cap=\"Credits: 2001-2003 Michael P.Frank (https://slideplayer.com/slide/17666226/)\",echo=FALSE}\n\nknitr::include_graphics(\"images/11-maths_example.png\")\n``` --->\n\n- A **function operator** is a function that takes one (or more) functions as input and returns a function as output.\n\n- Function operators are a special case of **function factories**, since they return functions.\n\n- They are often used to wrap an existing function to provide additional capability, similar to python's **decorators**. \n\n\n::: {.cell}\n\n```{.r .cell-code}\nchatty <- function(f) {\n force(f)\n \n function(x, ...) {\n res <- f(x, ...)\n cat(\"Processing \", x, \"\\n\", sep = \"\")\n res\n }\n}\n\nf <- function(x) x ^ 2\ns <- c(3, 2, 1)\n\npurrr::map_dbl(s, chatty(f))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Processing 3\n#> Processing 2\n#> Processing 1\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 9 4 1\n```\n\n\n:::\n:::\n\n\n## Existing function operators \n\nTwo function operator examples are `purrr:safely()` and `memoise::memoise()`. These can be found in `purr` and `memoise`:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(purrr)\nlibrary(memoise)\n```\n:::\n\n\n## purrr::safely {-}\n\nCapturing Errors: turns errors into data!\n\n \n\n::: {.cell}\n\n```{.r .cell-code}\nx <- list(\n c(0.512, 0.165, 0.717),\n c(0.064, 0.781, 0.427),\n c(0.890, 0.785, 0.495),\n \"oops\"\n)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmap_dbl(x, sum)\n#> Error in .Primitive(\"sum\")(..., na.rm = na.rm): invalid 'type' (character) of\n#> argument\n```\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# note use of map (not map_dbl), safely returns a lisst\n\nout <- map(x, safely(sum))\nstr(transpose(out))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> List of 2\n#> $ result:List of 4\n#> ..$ : num 1.39\n#> ..$ : num 1.27\n#> ..$ : num 2.17\n#> ..$ : NULL\n#> $ error :List of 4\n#> ..$ : NULL\n#> ..$ : NULL\n#> ..$ : NULL\n#> ..$ :List of 2\n#> .. ..$ message: chr \"invalid 'type' (character) of argument\"\n#> .. ..$ call : language .Primitive(\"sum\")(..., na.rm = na.rm)\n#> .. ..- attr(*, \"class\")= chr [1:3] \"simpleError\" \"error\" \"condition\"\n```\n\n\n:::\n:::\n\n \n\n\n## Other `purrr` function operators {-}\n\n<!---\n\n::: {.cell layout-align=\"center\"}\n::: {.cell-output-display}\n{fig-align='center' width=350}\n:::\n:::\n\n--->\n\n> purrr comes with three other function operators in a similar vein:\n\n \n possibly(): returns a default value when there’s an error. It provides no way to tell if an error occured or not, so it’s best reserved for cases when there’s some obvious sentinel value (like NA).\n\n quietly(): turns output, messages, and warning side-effects into output, message, and warning components of the output.\n\n auto_browser(): automatically executes browser() inside the function when there’s an error.\n\n\n## memoise::memoise {-}\n\nCaching computations: avoid repeated computations!\n \n\n\n::: {.cell}\n\n```{.r .cell-code}\nslow_function <- function(x) {\n Sys.sleep(1)\n x * 10 * runif(1)\n}\nsystem.time(print(slow_function(1)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 5.929748\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> user system elapsed \n#> 0.00 0.00 1.01\n```\n\n\n:::\n\n```{.r .cell-code}\nsystem.time(print(slow_function(1)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 8.725902\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> user system elapsed \n#> 0.00 0.00 1.01\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nfast_function <- memoise::memoise(slow_function)\nsystem.time(print(fast_function(1)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 6.995218\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> user system elapsed \n#> 0 0 1\n```\n\n\n:::\n\n```{.r .cell-code}\nsystem.time(print(fast_function(1)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 6.995218\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> user system elapsed \n#> 0.00 0.00 0.01\n```\n\n\n:::\n:::\n\n\n> Be careful about memoising impure functions! \n\n## Exercise {-}\n\nHow does `safely()` work? \nThe source code looks like this:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsafely\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (.f, otherwise = NULL, quiet = TRUE) \n#> {\n#> .f <- as_mapper(.f)\n#> force(otherwise)\n#> check_bool(quiet)\n#> function(...) capture_error(.f(...), otherwise, quiet)\n#> }\n#> <bytecode: 0x0000023950891460>\n#> <environment: namespace:purrr>\n```\n\n\n:::\n:::\n\n\nThe real work is done in `capture_error` which is defined in the package **namespace**. We can access it with the `:::` operator. (Could also grab it from the function's environment.)\n\n\n::: {.cell}\n\n```{.r .cell-code}\npurrr:::capture_error\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (code, otherwise = NULL, quiet = TRUE) \n#> {\n#> tryCatch(list(result = code, error = NULL), error = function(e) {\n#> if (!quiet) {\n#> message(\"Error: \", conditionMessage(e))\n#> }\n#> list(result = otherwise, error = e)\n#> })\n#> }\n#> <bytecode: 0x0000023950926580>\n#> <environment: namespace:purrr>\n```\n\n\n:::\n:::\n\n\n## Case study: make your own function operator\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nurls <- c(\n \"adv-r\" = \"https://adv-r.hadley.nz\", \n \"r4ds\" = \"http://r4ds.had.co.nz/\"\n # and many many more\n)\npath <- paste(tempdir(), names(urls), \".html\")\n\nwalk2(urls, path, download.file, quiet = TRUE)\n```\n:::\n\n\n\nHere we make a function operator that add a little delay in reading each page:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndelay_by <- function(f, amount) {\n force(f)\n force(amount)\n \n function(...) {\n Sys.sleep(amount)\n f(...)\n }\n}\nsystem.time(runif(100))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> user system elapsed \n#> 0 0 0\n```\n\n\n:::\n\n```{.r .cell-code}\nsystem.time(delay_by(runif, 0.1)(100))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> user system elapsed \n#> 0.00 0.00 0.11\n```\n\n\n:::\n:::\n\n\n\nAnd another to add a dot after nth invocation:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndot_every <- function(f, n) {\n force(f)\n force(n)\n \n i <- 0\n function(...) {\n i <<- i + 1\n if (i %% n == 0) cat(\".\")\n f(...)\n }\n}\n\nwalk(1:100, dot_every(runif, 10))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> ..........\n```\n\n\n:::\n:::\n\n\nCan now use both of these function operators to express our desired result:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nwalk2(\n urls, path, \n download.file %>% dot_every(10) %>% delay_by(0.1), \n quiet = TRUE\n)\n```\n:::\n\n\n## Exercise {-}\n\n2) Should you memoise file.download? Why or why not?\n\n \n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/zzUY03gt_pA\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/fD1QJB2pHik\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/Re6y5CQzwG4\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/rVooJFdbePs\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/XOurCfeJLGc\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/EPs57es2MsE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:01:42\tOluwafemi Oyedele:\tHi, Good Evening !!!\n00:05:52\tArthur Shaw:\t@federica, love the hex stickers behind you. All from rstudio::conf?\n00:07:12\tArthur Shaw:\tI tried doing the same. I had a hard time ordering them. I also thought I'd make the stickers into magnets so that I could rearrange them in future.\n00:48:34\tOluwafemi Oyedele:\tThank you !!!\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/WDehjcuc7xs\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:18:21\tcollinberke: Jenny Bryan debugging: https://www.youtube.com/watch?v=vgYS-F8opgE\n00:31:10\tcollinberke: https://purrr.tidyverse.org/reference/slowly.html\n00:47:43\tRobert Hilly: By guys!\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Base types\n---\n\n## Learning objectives:\n\n- Understand what OOP means--at the very least for R\n- Know how to discern an object's nature--base or OO--and type\n\n\n\n<details>\n<summary>Session Info</summary>\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(\"DiagrammeR\")\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nutils::sessionInfo()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> R version 4.5.1 (2025-06-13 ucrt)\n#> Platform: x86_64-w64-mingw32/x64\n#> Running under: Windows 11 x64 (build 26100)\n#> \n#> Matrix products: default\n#> LAPACK version 3.12.1\n#> \n#> locale:\n#> [1] LC_COLLATE=English_United States.utf8 \n#> [2] LC_CTYPE=English_United States.utf8 \n#> [3] LC_MONETARY=English_United States.utf8\n#> [4] LC_NUMERIC=C \n#> [5] LC_TIME=English_United States.utf8 \n#> \n#> time zone: America/Chicago\n#> tzcode source: internal\n#> \n#> attached base packages:\n#> [1] stats graphics grDevices utils datasets methods base \n#> \n#> other attached packages:\n#> [1] DiagrammeR_1.0.11\n#> \n#> loaded via a namespace (and not attached):\n#> [1] digest_0.6.37 RColorBrewer_1.1-3 R6_2.6.1 fastmap_1.2.0 \n#> [5] xfun_0.52 magrittr_2.0.3 glue_1.8.0 knitr_1.50 \n#> [9] htmltools_0.5.8.1 rmarkdown_2.29 cli_3.6.5 visNetwork_2.1.2 \n#> [13] compiler_4.5.1 tools_4.5.1 evaluate_1.0.4 yaml_2.3.10 \n#> [17] rlang_1.1.6 jsonlite_2.0.0 htmlwidgets_1.6.4 keyring_1.4.1\n```\n\n\n:::\n:::\n\n\n</details>\n\n\n## Why OOP is hard in R\n\n- Multiple OOP systems exist: S3, R6, S4, and (now/soon) S7.\n- Multiple preferences: some users prefer one system; others, another.\n- R's OOP systems are different enough that prior OOP experience may not transfer well.\n\n[](https://xkcd.com/927/)\n\n\n## OOP: Big Ideas\n\n1. **Polymorphism.** Function has a single interface (outside), but contains (inside) several class-specific implementations.\n\n::: {.cell}\n\n```{.r .cell-code}\n# imagine a function with object x as an argument\n# from the outside, users interact with the same function\n# but inside the function, there are provisions to deal with objects of different classes\nsome_function <- function(x) {\n if is.numeric(x) {\n # implementation for numeric x\n } else if is.character(x) {\n # implementation for character x\n } ...\n}\n```\n:::\n\n\n<details>\n<summary>Example of polymorphism</summary>\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# data frame\nsummary(mtcars[,1:4])\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mpg cyl disp hp \n#> Min. :10.40 Min. :4.000 Min. : 71.1 Min. : 52.0 \n#> 1st Qu.:15.43 1st Qu.:4.000 1st Qu.:120.8 1st Qu.: 96.5 \n#> Median :19.20 Median :6.000 Median :196.3 Median :123.0 \n#> Mean :20.09 Mean :6.188 Mean :230.7 Mean :146.7 \n#> 3rd Qu.:22.80 3rd Qu.:8.000 3rd Qu.:326.0 3rd Qu.:180.0 \n#> Max. :33.90 Max. :8.000 Max. :472.0 Max. :335.0\n```\n\n\n:::\n\n```{.r .cell-code}\n# statistical model\nlin_fit <- lm(mpg ~ hp, data = mtcars)\nsummary(lin_fit)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> \n#> Call:\n#> lm(formula = mpg ~ hp, data = mtcars)\n#> \n#> Residuals:\n#> Min 1Q Median 3Q Max \n#> -5.7121 -2.1122 -0.8854 1.5819 8.2360 \n#> \n#> Coefficients:\n#> Estimate Std. Error t value Pr(>|t|) \n#> (Intercept) 30.09886 1.63392 18.421 < 2e-16 ***\n#> hp -0.06823 0.01012 -6.742 1.79e-07 ***\n#> ---\n#> Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1\n#> \n#> Residual standard error: 3.863 on 30 degrees of freedom\n#> Multiple R-squared: 0.6024,\tAdjusted R-squared: 0.5892 \n#> F-statistic: 45.46 on 1 and 30 DF, p-value: 1.788e-07\n```\n\n\n:::\n:::\n\n\n</details>\n\n2. **Encapsulation.** Function \"encapsulates\"--that is, encloses in an inviolate capsule--both data and how it acts on data. Think of a REST API: a client interacts with with an API only through a set of discrete endpoints (i.e., things to get or set), but the server does not otherwise give access to its internal workings or state. Like with an API, this creates a separation of concerns: OOP functions take inputs and yield results; users only consume those results.\n\n## OOP: Properties\n\n### Objects have class\n\n- Class defines:\n - Method (i.e., what can be done with object)\n - Fields (i.e., data that defines an instance of the class)\n- Objects are an instance of a class\n\n### Class is inherited\n\n- Class is defined:\n - By an object's class (e.g., ordered factor)\n - By the parent of the object's class (e.g., factor)\n- Inheritance matters for method dispatch\n - If a method is defined for an object's class, use that method\n - If an object doesn't have a method, use the method of the parent class\n - The process of finding a method, is called dispatch\n\n## OOP in R: Two Paradigms\n\n**1. Encapsulated OOP**\n\n- Objects \"encapsulate\"\n - Methods (i.e., what can be done)\n - Fields (i.e., data on which things are done)\n- Calls communicate this encapsulation, since form follows function\n - Form: `object.method(arg1, arg2)`\n - Function: for `object`, apply `method` for `object`'s class with arguments `arg1` and `arg2`\n\n**2. Functional OOP**\n\n- Methods belong to \"generic\" functions\n- From the outside, look like regular functions: `generic(object, arg2, arg3)`\n- From the inside, components are also functions\n\n### Concept Map\n\n\n::: {.cell}\n::: {.cell-output-display}\n\n```{=html}\n<div class=\"DiagrammeR html-widget html-fill-item\" id=\"htmlwidget-d01e44d26b063c9aa5cc\" style=\"width:100%;height:464px;\"></div>\n<script type=\"application/json\" data-for=\"htmlwidget-d01e44d26b063c9aa5cc\">{\"x\":{\"diagram\":\"\\ngraph LR\\n\\nOOP --> encapsulated_OOP\\nOOP --> functional_OOP\\n\\nfunctional_OOP --> S3\\nfunctional_OOP --> S4\\n\\nencapsulated_OOP --> R6\\nencapsulated_OOP --> RC\\n\"},\"evals\":[],\"jsHooks\":[]}</script>\n```\n\n:::\n:::\n\n\n<details>\n<summary>Mermaid code</summary>\n\n::: {.cell}\n\n```{.r .cell-code}\nDiagrammeR::mermaid(\"\ngraph LR\n\nOOP --> encapsulated_OOP\nOOP --> functional_OOP\n\nfunctional_OOP --> S3\nfunctional_OOP --> S4\n\nencapsulated_OOP --> R6\nencapsulated_OOP --> RC\n\")\n```\n:::\n\n</details>\n\n## OOP in base R\n\n- **S3**\n - Paradigm: functional OOP\n - Noteworthy: R's first OOP system\n - Use case: low-cost solution for common problems\n - Downsides: no guarantees\n- **S4**\n - Paradigm: functional OOP\n - Noteworthy: rewrite of S3, used by `Bioconductor`\n - Use case: \"more guarantees and greater encapsulation\" than S3\n - Downsides: higher setup cost than S3\n- **RC**\n - Paradigm: encapsulated OOP\n - Noteworthy: special type of S4 object is mutable--in other words, that can be modified in place (instead of R's usual copy-on-modify behavior)\n - Use cases: problems that are hard to tackle with functional OOP (in S3 and S4)\n - Downsides: harder to reason about (because of modify-in-place logic)\n\n## OOP in packages\n\n- **R6**\n - Paradigm: encapsulated OOP\n - Noteworthy: resolves issues with RC\n- **R7**\n - Paradigm: functional OOP\n - Noteworthy: \n - best parts of S3 and S4\n - ease of S3\n - power of S4\n - See more in [rstudio::conf(2022) talk](https://www.rstudio.com/conference/2022/talks/introduction-to-r7/)\n- **R.oo**\n - Paradigm: hybrid functional and encapsulated (?)\n- **proto**\n - Paradigm: prototype OOP\n - Noteworthy: OOP style used in `ggplot2`\n\n## How can you tell if an object is base or OOP?\n\n### Functions\n\nTwo functions:\n\n- `base::is.object()`, which yields TRUE/FALSE about whether is OOP object\n- `sloop::otype()`, which says what type of object type: `\"base\"`, `\"S3\"`, etc.\n\nAn few examples:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Example 1: a base object\nis.object(1:10)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] FALSE\n```\n\n\n:::\n\n```{.r .cell-code}\nsloop::otype(1:10)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"base\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# Example 2: an OO object\nis.object(mtcars)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\nsloop::otype(mtcars)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"S3\"\n```\n\n\n:::\n:::\n\n\n### sloop\n\n* **S** **L**anguage **O**bject-**O**riented **P**rogramming\n\n[](https://en.wikipedia.org/wiki/Sloop_John_B)\n\n### Class\n\nOO objects have a \"class\" attribute:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# base object has no class\nattr(1:10, \"class\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> NULL\n```\n\n\n:::\n\n```{.r .cell-code}\n# OO object has one or more classes\nattr(mtcars, \"class\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"data.frame\"\n```\n\n\n:::\n:::\n\n\n## What about types?\n\nOnly OO objects have a \"class\" attribute, but every object--whether base or OO--has class\n\n### Vectors\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntypeof(NULL)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"NULL\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(c(\"a\", \"b\", \"c\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"character\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(1L)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"integer\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(1i)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"complex\"\n```\n\n\n:::\n:::\n\n\n\n### Functions\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# \"normal\" function\nmy_fun <- function(x) { x + 1 }\ntypeof(my_fun)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"closure\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# internal function\ntypeof(`[`)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"special\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# primitive function\ntypeof(sum) \n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"builtin\"\n```\n\n\n:::\n:::\n\n\n### Environments\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntypeof(globalenv())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"environment\"\n```\n\n\n:::\n:::\n\n\n\n### S4\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmle_obj <- stats4::mle(function(x = 1) (x - 2) ^ 2)\ntypeof(mle_obj)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"S4\"\n```\n\n\n:::\n:::\n\n\n\n### Language components\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntypeof(quote(a))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"symbol\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(quote(a + 1))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"language\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(formals(my_fun))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"pairlist\"\n```\n\n\n:::\n:::\n\n\n### Concept Map\n\n\n\n<details>\n<summary>Sankey graph code</summary>\n\nThe graph above was made with [SankeyMATIC](https://sankeymatic.com/)\n\n```\n// toggle \"Show Values\"\n// set Default Flow Colors from \"each flow's Source\"\n\nbase\\ntypes [8] vectors\nbase\\ntypes [3] functions\nbase\\ntypes [1] environments\nbase\\ntypes [1] S4 OOP\nbase\\ntypes [3] language\\ncomponents\nbase\\ntypes [6] C components\n\nvectors [1] NULL\nvectors [1] logical\nvectors [1] integer\nvectors [1] double\nvectors [1] complex\nvectors [1] character\nvectors [1] list\nvectors [1] raw\n\nfunctions [1] closure\nfunctions [1] special\nfunctions [1] builtin\n\nenvironments [1] environment\n\nS4 OOP [1] S4\n\nlanguage\\ncomponents [1] symbol\nlanguage\\ncomponents [1] language\nlanguage\\ncomponents [1] pairlist\n\nC components [1] externalptr\nC components [1] weakref\nC components [1] bytecode\nC components [1] promise\nC components [1] ...\nC components [1] any\n```\n\n</details>\n\n## Be careful about the numeric type\n\n1. Often \"numeric\" is treated as synonymous for double:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# create a double and integeger objects\none <- 1\noneL <- 1L\ntypeof(one)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"double\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(oneL)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"integer\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# check their type after as.numeric()\none |> as.numeric() |> typeof()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"double\"\n```\n\n\n:::\n\n```{.r .cell-code}\noneL |> as.numeric() |> typeof()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"double\"\n```\n\n\n:::\n:::\n\n\n2. In S3 and S4, \"numeric\" is taken as either integer or double, when choosing methods:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsloop::s3_class(1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"double\" \"numeric\"\n```\n\n\n:::\n\n```{.r .cell-code}\nsloop::s3_class(1L)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"integer\" \"numeric\"\n```\n\n\n:::\n:::\n\n\n3. `is.numeric()` tests whether an object behaves like a number\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntypeof(factor(\"x\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"integer\"\n```\n\n\n:::\n\n```{.r .cell-code}\nis.numeric(factor(\"x\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] FALSE\n```\n\n\n:::\n:::\n\n\nBut Advanced R consistently uses numeric to mean integer or double type.\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/Fy3JF5Em6qY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/9GkgNC15EAw\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/IL6iJhAsZAY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/4la5adcWwKE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/NeHtEGab1Og\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/rfidR7tI_nQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:35:02\tTrevin:\tsloop (“sail the seas of OOP”)\n00:42:40\tRyan Metcalf:\tAwesome input Trevin! I jumped to the vignette, but didn't see the reference directly.\n01:00:01\tTrevin:\tIf you're interested there may be a new “R Packages\" cohort starting up soon (also a new version of the book coming out soonish as well?)\n01:08:23\tOluwafemi Oyedele:\tThank you !!!\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/mOpmvc9h_4M\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:35:43\tStone: base::InternalMethods\n00:48:04\tcollinberke: https://cran.r-project.org/doc/manuals/R-exts.html\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: S3\n---\n\n# Introduction\n\n## Basics\n\n- Has class\n- Uses a generic function to decide on method\n - method = implementation for a specific class\n - dispatch = process of searching for right method\n\n## Classes\n\n**Theory:**\n\nWhat is class?\n\n - No formal definition in S3\n - Simply set class attribute\n\nHow to set class?\n\n - At time of object creation\n - After object creation\n \n\n::: {.cell}\n\n```{.r .cell-code}\n# at time of object creation\nx <- structure(list(), class = \"my_class\")\n\n# after object creation\nx <- list()\nclass(x) <- \"my_class\"\n```\n:::\n\n\nSome advice on style:\n\n - Rules: Can be any string\n - Advice: Consider using/including package name to avoid collision with name of another class (e.g., `blob`, which defines a single class; haven has `labelled` and `haven_labelled`)\n - Convention: letters and `_`; avoid `.` since it might be confused as separator between generic and class name\n\n**Practice:**\n\nHow to compose a class in practice?\n\n- **Constructor**, which helps the developer create new object of target class. Provide always.\n- **Validator**, which checks that values in constructor are valid. May not be necessary for simple classes.\n- **Helper**, which helps users create new objects of target class. May be relevant only for user-facing classes.\n\n### Constructors\n\nHelp developers construct an object of the target class:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnew_difftime <- function(x = double(), units = \"secs\") {\n # check inputs\n # issue generic system error if unexpected type or value\n stopifnot(is.double(x))\n units <- match.arg(units, c(\"secs\", \"mins\", \"hours\", \"days\", \"weeks\"))\n\n # construct instance of target class\n structure(x,\n class = \"difftime\",\n units = units\n )\n}\n```\n:::\n\n\n### Validators\n\nContrast a constructor, aimed at quickly creating instances of a class, which only checks type of inputs ...\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnew_factor <- function(x = integer(), levels = character()) {\n stopifnot(is.integer(x))\n stopifnot(is.character(levels))\n\n structure(\n x,\n levels = levels,\n class = \"factor\"\n )\n}\n\n# error messages are for system default and developer-facing\nnew_factor(1:5, \"a\")\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in as.character.factor(x): malformed factor\n```\n\n\n:::\n:::\n\n\n\n... with a validator, aimed at emitting errors if inputs pose problems, which makes more expensive checks\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvalidate_factor <- function(x) {\n values <- unclass(x)\n levels <- attr(x, \"levels\")\n\n if (!all(!is.na(values) & values > 0)) {\n stop(\n \"All `x` values must be non-missing and greater than zero\",\n call. = FALSE\n )\n }\n\n if (length(levels) < max(values)) {\n stop(\n \"There must be at least as many `levels` as possible values in `x`\",\n call. = FALSE\n )\n }\n\n x\n}\n\n# error messages are informative and user-facing\nvalidate_factor(new_factor(1:5, \"a\"))\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error: There must be at least as many `levels` as possible values in `x`\n```\n\n\n:::\n:::\n\n\nMaybe there is a typo in the `validate_factor()` function? Do the integers need to start at 1 and be consecutive? \n\n* If not, then `length(levels) < max(values)` should be `length(levels) < length(values)`, right?\n* If so, why do the integers need to start at 1 and be consecutive? And if they need to be as such, we should tell the user, right?\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvalidate_factor(new_factor(1:3, levels = c(\"a\", \"b\", \"c\")))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] a b c\n#> Levels: a b c\n```\n\n\n:::\n\n```{.r .cell-code}\nvalidate_factor(new_factor(10:12, levels = c(\"a\", \"b\", \"c\")))\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error: There must be at least as many `levels` as possible values in `x`\n```\n\n\n:::\n:::\n\n\n\n### Helpers\n\nSome desired virtues:\n\n- Have the same name as the class\n- Call the constructor and validator, if the latter exists.\n- Issue error informative, user-facing error messages\n- Adopt thoughtful/useful defaults or type conversion\n\n\nExercise 5 in 13.3.4\n\nQ: Read the documentation for `utils::as.roman()`. How would you write a constructor for this class? Does it need a validator? What might a helper do?\n\nA: This function transforms numeric input into Roman numbers. It is built on the integer type, which results in the following constructor.\n \n \n\n::: {.cell}\n\n```{.r .cell-code}\nnew_roman <- function(x = integer()) {\n stopifnot(is.integer(x))\n structure(x, class = \"roman\")\n}\n```\n:::\n\n\nThe documentation tells us, that only values between 1 and 3899 are uniquely represented, which we then include in our validation function.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvalidate_roman <- function(x) {\n values <- unclass(x)\n \n if (any(values < 1 | values > 3899)) {\n stop(\n \"Roman numbers must fall between 1 and 3899.\",\n call. = FALSE\n )\n }\n x\n}\n```\n:::\n\n\nFor convenience, we allow the user to also pass real values to a helper function.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nroman <- function(x = integer()) {\n x <- as.integer(x)\n \n validate_roman(new_roman(x))\n}\n\n# Test\nroman(c(1, 753, 2024))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] I DCCLIII MMXXIV\n```\n\n\n:::\n\n```{.r .cell-code}\nroman(0)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error: Roman numbers must fall between 1 and 3899.\n```\n\n\n:::\n:::\n\n\n\n\n## Generics and methods\n\n**Generic functions:**\n\n- Consist of a call to `UseMethod()`\n- Pass arguments from the generic to the dispatched method \"auto-magically\"\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmy_new_generic <- function(x) {\n UseMethod(\"my_new_generic\")\n}\n```\n:::\n\n\n### Method dispatch\n\n- `UseMethod()` creates a vector of method names\n- Dispatch \n - Examines all methods in the vector\n - Selects a method\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- Sys.Date()\nsloop::s3_dispatch(print(x))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> => print.Date\n#> * print.default\n```\n\n\n:::\n:::\n\n\n### Finding methods\n\nWhile `sloop::s3_dispatch()` gives the specific method selected for a specific call, on can see the methods defined:\n\n- For a generic\n\n::: {.cell}\n\n```{.r .cell-code}\nsloop::s3_methods_generic(\"mean\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 7 × 4\n#> generic class visible source \n#> <chr> <chr> <lgl> <chr> \n#> 1 mean Date TRUE base \n#> 2 mean default TRUE base \n#> 3 mean difftime TRUE base \n#> 4 mean POSIXct TRUE base \n#> 5 mean POSIXlt TRUE base \n#> 6 mean quosure FALSE registered S3method\n#> 7 mean vctrs_vctr FALSE registered S3method\n```\n\n\n:::\n:::\n\n- For a class\n\n::: {.cell}\n\n```{.r .cell-code}\nsloop::s3_methods_class(\"ordered\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 4 × 4\n#> generic class visible source \n#> <chr> <chr> <lgl> <chr> \n#> 1 as.data.frame ordered TRUE base \n#> 2 Ops ordered TRUE base \n#> 3 relevel ordered FALSE registered S3method\n#> 4 Summary ordered TRUE base\n```\n\n\n:::\n:::\n\n\n### Creating methods\n\nTwo rules:\n\n- Only write a method if you own the generic. Otherwise, bad manners.\n- Method must have same arguments as its generic--with one important exception: `...`\n\n**Example from text:**\n\nI thought it would be good for us to work through this problem.\n\n> Carefully read the documentation for `UseMethod()` and explain why the following code returns the results that it does. What two usual rules of function evaluation does `UseMethod()` violate?\n\n\n::: {.cell}\n\n```{.r .cell-code}\ng <- function(x) {\n x <- 10\n y <- 10\n UseMethod(\"g\")\n}\ng.default <- function(x) c(x = x, y = y)\n\nx <- 1\ny <- 1\ng(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x y \n#> 1 1\n```\n\n\n:::\n\n```{.r .cell-code}\ng.default(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x y \n#> 1 1\n```\n\n\n:::\n:::\n\n\n\n\n**Examples caught in the wild:**\n\n- [`haven::zap_label`](https://github.com/tidyverse/haven/blob/main/R/zap_label.R), which removes column labels\n- [`dplyr::mutate`](https://github.com/tidyverse/dplyr/blob/main/R/mutate.R)\n- [`tidyr::pivot_longer`](https://github.com/tidyverse/tidyr/blob/main/R/pivot-long.R)\n\n## Object styles\n\n## Inheritance\n\nThree ideas:\n\n1. Class is a vector of classes\n\n::: {.cell}\n\n```{.r .cell-code}\nclass(ordered(\"x\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"ordered\" \"factor\"\n```\n\n\n:::\n\n```{.r .cell-code}\nclass(Sys.time())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"POSIXct\" \"POSIXt\"\n```\n\n\n:::\n:::\n\n2. Dispatch moves through class vector until it finds a defined method\n\n::: {.cell}\n\n```{.r .cell-code}\nsloop::s3_dispatch(print(ordered(\"x\")))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> print.ordered\n#> => print.factor\n#> * print.default\n```\n\n\n:::\n:::\n\n3. Method can delegate to another method via `NextMethod()`, which is indicated by `->` as below:\n\n::: {.cell}\n\n```{.r .cell-code}\nsloop::s3_dispatch(ordered(\"x\")[1])\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [.ordered\n#> => [.factor\n#> [.default\n#> -> [ (internal)\n```\n\n\n:::\n:::\n\n\n### `NextMethod()`\n\nConsider `secret` class that masks each character of the input with `x` in output\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnew_secret <- function(x = double()) {\n stopifnot(is.double(x))\n structure(x, class = \"secret\")\n}\n\nprint.secret <- function(x, ...) {\n print(strrep(\"x\", nchar(x)))\n invisible(x)\n}\n\ny <- new_secret(c(15, 1, 456))\ny\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"xx\" \"x\" \"xxx\"\n```\n\n\n:::\n:::\n\n\nNotice that the `[` method is problematic in that it does not preserve the `secret` class. Additionally, it returns `15` as the first element instead of `xx`.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsloop::s3_dispatch(y[1])\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [.secret\n#> [.default\n#> => [ (internal)\n```\n\n\n:::\n\n```{.r .cell-code}\ny[1]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 15\n```\n\n\n:::\n:::\n\n\nFix this with a `[.secret` method:\n\nThe first fix (not run) is inefficient because it creates a copy of `y`.\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# not run\n`[.secret` <- function(x, i) {\n x <- unclass(x)\n new_secret(x[i])\n}\n```\n:::\n\n\n`NextMethod()` is more efficient.\n\n\n::: {.cell}\n\n```{.r .cell-code}\n`[.secret` <- function(x, i) {\n # first, dispatch to `[`\n # then, coerce subset value to `secret` class\n new_secret(NextMethod())\n}\n```\n:::\n\n\nNotice that `[.secret` is selected for dispatch, but that the method delegates to the internal `[`.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsloop::s3_dispatch(y[1])\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> => [.secret\n#> [.default\n#> -> [ (internal)\n```\n\n\n:::\n\n```{.r .cell-code}\ny[1]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"xx\"\n```\n\n\n:::\n:::\n\n\n\n### Allowing subclassing\n\nContinue the example above to have a `supersecret` subclass that hides even the number of characters in the input (e.g., `123` -> `xxxxx`, 12345678 -> `xxxxx`, 1 -> `xxxxx`).\n\nTo allow for this subclass, the constructor function needs to include two additional arguments:\n\n- `...` for passing an arbitrary set of arguments to different subclasses\n- `class` for defining the subclass\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnew_secret <- function(x, ..., class = character()) {\n stopifnot(is.double(x))\n\n structure(\n x,\n ...,\n class = c(class, \"secret\")\n )\n}\n```\n:::\n\n\nTo create the subclass, simply invoke the parent class constructor inside of the subclass constructor:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnew_supersecret <- function(x) {\n new_secret(x, class = \"supersecret\")\n}\n\nprint.supersecret <- function(x, ...) {\n print(rep(\"xxxxx\", length(x)))\n invisible(x)\n}\n```\n:::\n\n\nBut this means the subclass inherits all parent methods and needs to overwrite all parent methods with subclass methods that return the sublclass rather than the parent class.\n\nThere's no easy solution to this problem in base R.\n\nThere is a solution in the vectors package: `vctrs::vec_restore()`\n\n<!-- TODO: read docs/vignettes to be able to summarize how this works -->\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/Fy3JF5Em6qY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/9GkgNC15EAw\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/q7lFXSLdC1g\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<iframe src=\"https://www.youtube.com/embed/2rHS_urTGFg\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/4la5adcWwKE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<iframe src=\"https://www.youtube.com/embed/eTCT2O58GYM\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/NeHtEGab1Og\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/vzbl2o-MEeQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:05:30\tOluwafemi Oyedele:\tHi everyone, Good Evening !!!\n00:09:44\tTrevin:\tI agree Arthur, need to look at that package some more\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/zNLx4q8TCKQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n",
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+ "markdown": "---\nengine: knitr\ntitle: R6\n---\n\n## Learning objectives:\n\n\n\n- Discuss how to construct a R6 class.\n- Overview the different mechanisms of a R6 class (e.g. initialization, print, public, private, and active fields and methods).\n- Observe various examples using R6's mechanisms to create R6 classes, objects, fields, and methods.\n- Observe the consequences of R6's reference semantics.\n- Review the book's arguments on the use of R6 over reference classes.\n\n## A review of OOP\n\n\n\n* **A PIE**\n\n## Introducing R6 \n\n\n\n* R6 classes are not built into base.\n * It is a separate [package](https://r6.r-lib.org/).\n * You have to install and attach to use.\n * If R6 objects are used in a package, it needs to be specified as a dependency in the `DESCRIPTION` file.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ninstall.packages(\"R6\")\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(R6)\n```\n:::\n\n\n* R6 classes have two special properties:\n 1. Uses an encapsulated OOP paradigm.\n * Methods belong to objects, not generics.\n * They follow the form `object$method()` for calling fields and methods.\n 2. R6 objects are mutable.\n * Modified in place.\n * They follow reference semantics.\n* R6 is similar to OOP in other languages.\n* However, its use can lead ton non-idiomatic R code.\n * Tradeoffs - follows an OOP paradigm but sacrafice what users are use to. \n * [Microsoft365R](https://github.com/Azure/Microsoft365R).\n\n## Constructing an R6 class, the basics\n\n* Really simple to do, just use the `R6::R6Class()` function.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nAccumulator <- R6Class(\"Accumulator\", list(\n sum = 0,\n add = function(x = 1) {\n self$sum <- self$sum + x\n invisible(self)\n }\n))\n```\n:::\n\n\n* Two important arguments:\n 1. `classname` - A string used to name the class (not needed but suggested)\n 2. `public` - A list of methods (functions) and fields (anything else)\n* Suggested style conventions to follow:\n * Class name should follow `UpperCamelCase`.\n * Methods and fields should use `snake_case`.\n * Always assign the result of a `R6Class()` into a variable with the same name as the class.\n* You can use `self$` to access methods and fields of the current object.\n\n## Constructing an R6 object\n\n* Just use `$new()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- Accumulator$new()\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx$add(4)\nx$sum\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 4\n```\n\n\n:::\n:::\n\n\n## R6 objects and method chaining\n\n* All side-effect R6 methods should return `self` invisibly.\n* This allows for method chaining.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx$add(10)$add(10)$sum\n# [1] 24\n```\n:::\n\n\n* To improve readability:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Method chaining\nx$\n add(10)$\n add(10)$\n sum\n# [1] 44\n```\n:::\n\n\n## R6 useful methods\n\n* `$print()` - Modifies the default printing method.\n * `$print()` should always return `invisible(self)`.\n* `$initialize()` - Overides the default behaviour of `$new()`.\n * Also provides a space to validate inputs.\n\n## Constructing a bank account class\n\n\n::: {.cell}\n\n```{.r .cell-code}\nBankAccount <- R6Class(\"BankAccount\", list(\n owner = NULL,\n type = NULL,\n balance = 0,\n initialize = function(owner, type) {\n stopifnot(is.character(owner), length(owner) == 1)\n stopifnot(is.character(type), length(type) == 1)\n },\n deposit = function(amount) {\n self$balance <- self$balance + amount\n invisible(self)\n },\n withdraw = function(amount) {\n self$balance <- self$balance - amount\n invisible(self)\n }\n))\n```\n:::\n\n\n## Simple transactions\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncollinsavings <- BankAccount$new(\"Collin\", type = \"Savings\")\ncollinsavings$deposit(10)\ncollinsavings\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <BankAccount>\n#> Public:\n#> balance: 10\n#> clone: function (deep = FALSE) \n#> deposit: function (amount) \n#> initialize: function (owner, type) \n#> owner: NULL\n#> type: NULL\n#> withdraw: function (amount)\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncollinsavings$withdraw(10)\ncollinsavings\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <BankAccount>\n#> Public:\n#> balance: 0\n#> clone: function (deep = FALSE) \n#> deposit: function (amount) \n#> initialize: function (owner, type) \n#> owner: NULL\n#> type: NULL\n#> withdraw: function (amount)\n```\n\n\n:::\n:::\n\n\n## Modifying the `$print()` method \n\n\n::: {.cell}\n\n```{.r .cell-code}\nBankAccount <- R6Class(\"BankAccount\", list(\n owner = NULL,\n type = NULL,\n balance = 0,\n initialize = function(owner, type) {\n stopifnot(is.character(owner), length(owner) == 1)\n stopifnot(is.character(type), length(type) == 1)\n\n self$owner <- owner\n self$type <- type\n },\n deposit = function(amount) {\n self$balance <- self$balance + amount\n invisible(self)\n },\n withdraw = function(amount) {\n self$balance <- self$balance - amount\n invisible(self)\n },\n print = function(...) {\n cat(\"Account owner: \", self$owner, \"\\n\", sep = \"\")\n cat(\"Account type: \", self$type, \"\\n\", sep = \"\")\n cat(\" Balance: \", self$balance, \"\\n\", sep = \"\")\n invisible(self)\n }\n))\n```\n:::\n\n\n* Important point: Methods are bound to individual objects.\n * Reference semantics vs. copy-on-modify.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncollinsavings\n\nhadleychecking <- BankAccount$new(\"Hadley\", type = \"Checking\")\n\nhadleychecking\n```\n:::\n\n\n## How does this work? \n\n* [Winston Chang's 2017 useR talk](https://www.youtube.com/watch?v=3GEFd8rZQgY&list=WL&index=11)\n\n* [R6 objects are just environments with a particular structure.](https://youtu.be/3GEFd8rZQgY?t=759)\n \n\n\n## Adding methods after class creation\n\n* Use `$set()` to add methods after creation.\n* Keep in mind methods added with `$set()` are only available with new objects.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nAccumulator <- R6Class(\"Accumulator\")\nAccumlator$set(\"public\", \"sum\", 0)\nAccumulator$set(\"public\", \"add\", function(x = 1) {\n self$sum <- self$sum + x\n invisible(self)\n})\n```\n:::\n\n\n## Inheritance\n\n* To inherit behaviour from an existing class, provide the class object via the `inherit` argument.\n* This example also provides a good example on how to [debug]() an R6 class.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nBankAccountOverDraft <- R6Class(\"BankAccountOverDraft\",\n inherit = BankAccount,\n public = list(\n withdraw = function(amount) {\n if ((self$balance - amount) < 0) {\n stop(\"Overdraft\")\n }\n # self$balance() <- self$withdraw()\n self$balance <- self$balance - amount\n invisible(self)\n }\n )\n)\n```\n:::\n\n\n### Future instances debugging\n\n\n::: {.cell}\n\n```{.r .cell-code}\nBankAccountOverDraft$debug(\"withdraw\")\nx <- BankAccountOverDraft$new(\"x\", type = \"Savings\")\nx$withdraw(20)\n\n# Turn debugging off\nBankAccountOverDraft$undebug(\"withdraw\")\n```\n:::\n\n\n### Individual object debugging\n\n* Use the `debug()` function.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- BankAccountOverDraft$new(\"x\", type = \"Savings\")\n# Turn on debugging\ndebug(x$withdraw)\nx$withdraw(10)\n\n# Turn off debugging\nundebug(x$withdraw)\nx$withdraw(5)\n```\n:::\n\n\n### Test out our debugged class\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncollinsavings <- BankAccountOverDraft$new(\"Collin\", type = \"Savings\")\ncollinsavings\ncollinsavings$withdraw(10)\ncollinsavings\ncollinsavings$deposit(5)\ncollinsavings\ncollinsavings$withdraw(5)\n```\n:::\n\n\n## Introspection\n\n* Every R6 object has an S3 class that reflects its hierarchy of R6 classes.\n* Use the `class()` function to determine class (and all classes it inherits from).\n\n\n::: {.cell}\n\n```{.r .cell-code}\nclass(collinsavings)\n```\n:::\n\n\n* You can also list all methods and fields of an R6 object with `names()`.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnames(collinsavings)\n```\n:::\n\n\n## Controlling access\n\n* R6 provides two other arguments:\n * `private` - create fields and methods only available from within the class.\n * `active` - allows you to use accessor functions to define dynamic or active fields.\n\n## Privacy\n\n* Private fields and methods - elements that can only be accessed from within the class, not from the outside.\n* We need to know two things to use private elements:\n 1. `private`'s interface is just like `public`'s interface.\n * List of methods (functions) and fields (everything else).\n 2. You use `private$` instead of `self$`\n * You cannot access private fields or methods outside of the class.\n* Why might you want to keep your methods and fields private?\n * You'll want to be clear what is ok for others to access, especially if you have a complex system of classes.\n * It's easier to refactor private fields and methods, as you know others are not relying on it.\n\n## Active fields\n\n* Active fields allow you to define components that look like fields from the outside, but are defined with functions, like methods.\n* Implemented using active bindings.\n* Each active binding is a function that takes a single argument `value`.\n* Great when used in conjunction with private fields.\n * This allows for additional checks.\n * For example, we can use them to make a read-only field and to validate inputs.\n\n## Adding a read-only bank account number\n\n\n::: {.cell}\n\n```{.r .cell-code}\nBankAccount <- R6Class(\"BankAccount\", public = list(\n owner = NULL,\n type = NULL,\n balance = 0,\n initialize = function(owner, type, acct_num = NULL) {\n private$acct_num <- acct_num\n self$owner <- owner\n self$type <- type\n },\n deposit = function(amount) {\n self$balance <- self$balance + amount\n invisible(self)\n },\n withdraw = function(amount) {\n self$balance <- self$balance - amount\n invisible(self)\n },\n print = function(...) {\n cat(\"Account owner: \", self$owner, \"\\n\", sep = \"\")\n cat(\"Account type: \", self$type, \"\\n\", sep = \"\")\n cat(\"Account #: \", private$acct_num, \"\\n\", sep = \"\")\n cat(\" Balance: \", self$balance, \"\\n\", sep = \"\")\n invisible(self)\n }\n ),\n private = list(\n acct_num = NULL\n ),\n active = list(\n create_acct_num = function(value) {\n if (is.null(private$acct_num)) {\n private$acct_num <- ids::uuid()\n } else {\n stop(\"`$acct_num` already assigned\")\n }\n }\n )\n)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncollinsavings <- BankAccount$new(\"Collin\", type = \"Savings\")\ncollinsavings$create_acct_num\n# Stops because account number is assigned\ncollinsavings$create_acct_num()\ncollinsavings$print()\n```\n:::\n\n\n## How does an active field work?\n\n* Not sold on this, as I don't know if `active` gets its own environment. \n * Any ideas?\n\n\n\n## Reference semantics\n\n* Big difference to note about R6 objects in relation to other objects:\n * R6 objects have reference semantics.\n* The primary consequence of reference semantics is that objects are not copied when modified.\n* If you want to copy an R6 object, you need to use `$clone`.\n* There are some other less obvious consequences:\n * It's harder to reason about code that uses R6 objects, as you need more context.\n * Think about when an R6 object is deleted, you can use `$finalize()` to clean up after yourself.\n * If one of the fields is an R6 object, you must create it inside `$initialize()`, not `R6Class()`\n\n## R6 makes it harder to reason about code\n\n* Reference semantics makes code harder to reason about.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- list(a = 1)\ny <- list(b = 2)\n\n# Here we know the final line only modifies z\nz <- f(x, y)\n\n# vs.\n\nx <- List$new(a = 1)\ny <- List$new(b = 2)\n\n# If x or y is a method, we don't know if it modifies\n# something other than z. Is this a limitation of\n# abstraction?\nz <- f(x, y)\n```\n:::\n\n\n* I understand the basics, but not necessarily the tradeoffs.\n * Anyone care to fill me in?\n * Is this a limitation of abstraction?\n\n## Better sense of what's going on by looking at a finalizer\n\n* Since R6 objects are not copied-on-modified, so they are only deleted once.\n* We can use this characteristic to complement our `$initialize()` with a `$finalize()` method.\n * i.e., to clean up after we delete an R6 object.\n * This could be a way to close a database connection.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nTemporaryFile <- R6Class(\"TemporaryFile\", list(\n path = NULL,\n initialize = function() {\n self$path <- tempfile()\n },\n finalize = function() {\n message(\"Cleaning up \", self$path)\n unlink(self$path)\n }\n))\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntf <- TemporaryFile$new()\n# The finalizer will clean up, once the R6 object is deleted.\nrm(tf)\n```\n:::\n\n\n## Consequences of R6 fields\n\n* If you use an R6 class as the default value of a field, it will be shared across all instances of the object.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nTemporaryDatabase <- R6Class(\"TemporaryDatabase\", list(\n con = NULL,\n file = TemporaryFile$new(),\n initialize = function() {\n self$con <- DBI::dbConnect(RSQLite::SQLite(), path = file$path)\n },\n finalize = function() {\n DBI::dbDisconnect(self$con)\n }\n))\n\ndb_a <- TemporaryDatabase$new()\ndb_b <- TemporaryDatabase$new()\n\ndb_a$file$path == db_b$file$path\n#> [1] TRUE\n```\n:::\n\n\n* To fix this, we need to move the class method call to `$intialize()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nTemporaryDatabase <- R6Class(\"TemporaryDatabase\", list(\n con = NULL,\n file = NULL,\n initialize = function() {\n self$file <- TemporaryFile$new()\n self$con <- DBI::dbConnect(RSQLite::SQLite(), path = file$path)\n },\n finalize = function() {\n DBI::dbDisconnect(self$con)\n }\n))\n\ndb_a <- TemporaryDatabase$new()\ndb_b <- TemporaryDatabase$new()\n\ndb_a$file$path == db_b$file$path\n#> [1] FALSE\n```\n:::\n\n\n## Why use R6?\n\n* Book mentions R6 is similar to the built-in reference classes.\n* Then why use R6?\n* R6 is simpler. \n * RC requires you to understand S4.\n* [Comprehensive documentation](https://r6.r-lib.org/articles/Introduction.html).\n* Simpler mechanisms for cross-package subclassing, which just works.\n* R6 separates public and private fields in separate environments, RC stacks everything in the same environment. \n* [R6 is faster](https://r6.r-lib.org/articles/Performance.html).\n* RC is tied to R, so any bug fixes need a newer version of R.\n * This is especially important if you're writing packages that need to work with multiple R versions.\n* R6 and RC are similar, so if you need RC, it will only require a small amount of additional effort to learn RC.\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/hPjaOdprgow\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/LVkDJ28XJUE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/rCjQTbQ22qc\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<iframe src=\"https://www.youtube.com/embed/ii6xhOzT_HQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/i_z6pHavhX0\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/NXmlqK2LxWw\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/EuTubeJ1VUw\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:11:34\tTrevin:\thttps://engineering-shiny.org/common-app-caveats.html?q=R6#using-r6-as-data-storage\n00:39:36\tFederica Gazzelloni:\tnew R7: https://rconsortium.github.io/OOP-WG/\n00:40:04\tFederica Gazzelloni:\tR7 designed to be a successor to S3 and S4\n00:40:40\tFederica Gazzelloni:\tR6: https://r6.r-lib.org/articles/Introduction.html\n00:52:44\tTrevin:\thttps://advanced-r-solutions.rbind.io/r6.html#controlling-access\n01:00:34\tFederica Gazzelloni:\tinteresting: https://r-craft.org/r-news/object-oriented-programming-oop-in-r-with-r6-the-complete-guide/\n01:01:58\tTrevin:\thttps://hadley.shinyapps.io/cran-downloads/\n01:02:33\tOluwafemi Oyedele:\tThank you !!!\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/Q4FA0BB_PeY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:06:57\tRon Legere:\thttps://arxiv.org/abs/2303.12712\n00:07:07\tRon Legere:\t^^ shows some of the power and limitations\n00:39:41\tcollinberke:\thttps://www.youtube.com/watch?v=3GEFd8rZQgY&list=WL&index=11\n00:49:20\tiPhone:\tSorry fellas need to jump early. See you next week!\n01:05:21\tcollinberke:\thttps://github.com/r4ds/bookclub-advr\n01:09:30\tRon Legere:\tmakeActiveBinding\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: S4\n---\n\n## Introduction\n\nObject consists of:\n\n- Slots. Like fields in R6.\n- Methods. Accessed through generics. Dispatched to particular methods.\n\nUses functions to define classes and their methods:\n\n- `setClass()`. Define class and its components. \n- `setGenerics()`. Define generic functions. Used to dispatch.\n- `setMethods()`. Define methods\n\n## Basics overview\n\n### Set class\n\nDefine the class:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsetClass(\"Person\", \n slots = c(\n name = \"character\", \n age = \"numeric\"\n )\n)\n```\n:::\n\n\nCreate an instance of the class\n\n\n::: {.cell}\n\n```{.r .cell-code}\njohn <- new(\"Person\", name = \"John Smith\", age = NA_real_)\n```\n:::\n\n\n\n### Set generics\n\nDefine generic functions for setting and getting the age slot\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# get the value\nsetGeneric(\"age\", function(x) standardGeneric(\"age\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"age\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# set the value\nsetGeneric(\"age<-\", function(x, value) standardGeneric(\"age<-\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"age<-\"\n```\n\n\n:::\n:::\n\n\n### Set methods\n\nDefine methods for the generics:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# get the value\nsetMethod(\"age\", \"Person\", function(x) x@age)\n# set the value\nsetMethod(\"age<-\", \"Person\", function(x, value) {\n x@age <- value\n x\n})\n\n# set the value\nage(john) <- 50\n# get the value\nage(john)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 50\n```\n\n\n:::\n:::\n\n\nTo give a flavor, there is only one method per slot. In more realistic cases, there might be several methods.\n\n## Details on defining the class\n\n### Inheritance\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsetClass(\"Employee\", \n contains = \"Person\", \n slots = c(\n boss = \"Person\"\n ),\n prototype = list(\n boss = new(\"Person\")\n )\n)\n```\n:::\n\n\n### Instantiation\n\nCreate an instance of the class at two levels:\n\n- For developer (you): `methods::new()`\n- For user: constructor function\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# how user constructs an instance\nPerson <- function(name, age = NA) {\n age <- as.double(age)\n \n # how the developer constructs an instance\n new(\"Person\", name = name, age = age)\n}\n\nPerson(\"Someone\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> An object of class \"Person\"\n#> Slot \"name\":\n#> [1] \"Someone\"\n#> \n#> Slot \"age\":\n#> [1] NA\n```\n\n\n:::\n:::\n\n\n### Validation\n\nS4 objects\n\n- Check class of slot at creation\n\n::: {.cell}\n\n```{.r .cell-code}\nPerson(mtcars)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in validObject(.Object): invalid class \"Person\" object: invalid object for slot \"name\" in class \"Person\": got class \"data.frame\", should be or extend class \"character\"\n```\n\n\n:::\n:::\n\n\n- Do **not** check other things\n\n::: {.cell}\n\n```{.r .cell-code}\nPerson(\"Hadley\", age = c(30, 37))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> An object of class \"Person\"\n#> Slot \"name\":\n#> [1] \"Hadley\"\n#> \n#> Slot \"age\":\n#> [1] 30 37\n```\n\n\n:::\n:::\n\n\nThat's where validation comes in--at two stages:\n\n1. At creation\n2. At modification\n\n#### At creation\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsetValidity(\"Person\", function(object) {\n if (length(object@name) != length(object@age)) {\n \"@name and @age must be same length\"\n } else {\n TRUE\n }\n})\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Class \"Person\" [in \".GlobalEnv\"]\n#> \n#> Slots:\n#> \n#> Name: name age\n#> Class: character numeric\n```\n\n\n:::\n\n```{.r .cell-code}\nPerson(\"Hadley\", age = c(30, 37))\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in validObject(.Object): invalid class \"Person\" object: @name and @age must be same length\n```\n\n\n:::\n:::\n\n\n#### At modification\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# get value\nsetGeneric(\"name\", function(x) standardGeneric(\"name\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"name\"\n```\n\n\n:::\n\n```{.r .cell-code}\nsetMethod(\"name\", \"Person\", function(x) x@name)\n\n# set value--and assess whether resulting object is valid\nsetGeneric(\"name<-\", function(x, value) standardGeneric(\"name<-\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"name<-\"\n```\n\n\n:::\n\n```{.r .cell-code}\nsetMethod(\"name<-\", \"Person\", function(x, value) {\n x@name <- value\n validObject(x)\n x\n})\n\n# normal name; no problem\nname(john) <- \"Jon Smythe\"\nname(john)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"Jon Smythe\"\n```\n\n\n:::\n\n```{.r .cell-code}\n# invalid name; error thrown\nname(john) <- letters\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in validObject(x): invalid class \"Person\" object: @name and @age must be same length\n```\n\n\n:::\n:::\n\n\n\n## Details on generics and methods\n\n### Dictate dispatch via signature\n\nSpecify function arguments to be used in determining method.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsetGeneric(\"myGeneric\", \n function(x, ..., verbose = TRUE) standardGeneric(\"myGeneric\"),\n signature = \"x\"\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"myGeneric\"\n```\n\n\n:::\n:::\n\n\n### Define generics\n\nGeneral form:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsetMethod(\"myGeneric\", \"Person\", function(x) {\n # method implementation\n})\n```\n:::\n\n\nExample to print object:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsetMethod(\"show\", \"Person\", function(object) {\n cat(is(object)[[1]], \"\\n\",\n \" Name: \", object@name, \"\\n\",\n \" Age: \", object@age, \"\\n\",\n sep = \"\"\n )\n})\njohn\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Person\n#> Name: Jon Smythe\n#> Age: 50\n```\n\n\n:::\n:::\n\n\nExample to access slot:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsetGeneric(\"name\", function(x) standardGeneric(\"name\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"name\"\n```\n\n\n:::\n\n```{.r .cell-code}\nsetMethod(\"name\", \"Person\", function(x) x@name)\n\nname(john)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"Jon Smythe\"\n```\n\n\n:::\n:::\n\n\n\nThis is how end users should access slots.\n\n## Example: `lubridate::period()`\n\n### Define the class\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsetClass(\"Period\",\n # inherits from these classes\n contains = c(\"Timespan\", \"numeric\"),\n # has slots for time components\n slots = c(\n year = \"numeric\", \n month = \"numeric\", \n day = \"numeric\",\n hour = \"numeric\", \n minute = \"numeric\"\n ),\n # defines prototype as period of zero duration for all slots\n prototype = prototype(year = 0, month = 0, day = 0, hour = 0, minute = 0),\n # check validity with `check_period` function; see section below\n validity = check_period\n)\n```\n:::\n\n\nSee source code [here](https://github.com/tidyverse/lubridate/blob/0bb49b21c88736240219dc67e7ed0eb3df15d9b1/R/periods.r#L90)\n\n### Validate object\n\nCheck whether object is valid--notably if all arugments have the same length and are integers.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncheck_period <- function(object) {\n # start with an empty vector of error messages\n errors <- character()\n\n # check length of object's data\n length(object@.Data) -> n\n # check length of each slot\n lengths <- c(\n length(object@year), \n length(object@month),\n length(object@day), \n length(object@hour), \n length(object@minute)\n )\n\n # if length of any slot is different than overall length, compose error message\n if (any(lengths != n)) {\n msg <- paste(\"Inconsistent lengths: year = \", lengths[1],\n \", month = \", lengths[2],\n \", day = \", lengths[3],\n \", hour = \", lengths[4],\n \", minute = \", lengths[5],\n \", second = \", n,\n sep = \"\"\n )\n # add just-composed error to vector of error messages\n errors <- c(errors, msg)\n }\n\n values <- c(object@year, object@month, object@day, object@hour, object@minute)\n values <- na.omit(values)\n if (sum(values - trunc(values))) {\n msg <- \"periods must have integer values\"\n errors <- c(errors, msg)\n }\n\n if (length(errors) == 0) {\n TRUE\n } else {\n errors\n }\n}\n```\n:::\n\n\n\nSee source code [here](https://github.com/tidyverse/lubridate/blob/0bb49b21c88736240219dc67e7ed0eb3df15d9b1/R/periods.r#L6).\n\n### Set methods\n\nShow period:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n#' @export\nsetMethod(\"show\", signature(object = \"Period\"), function(object) {\n if (length(object@.Data) == 0) {\n cat(\"<Period[0]>\\n\")\n } else {\n print(format(object))\n }\n})\n\n#' @export\nformat.Period <- function(x, ...) {\n if (length(x) == 0) {\n return(character())\n }\n\n show <- paste(\n x@year, \"y \", x@month, \"m \", x@day, \"d \",\n x@hour, \"H \", x@minute, \"M \", x@.Data, \"S\",\n sep = \"\"\n )\n start <- regexpr(\"[-1-9]|(0\\\\.)\", show)\n show <- ifelse(start > 0, substr(show, start, nchar(show)), \"0S\")\n\n show[is.na(x)] <- NA\n show\n}\n```\n:::\n\n\nSee source code [here](https://github.com/tidyverse/lubridate/blob/0bb49b21c88736240219dc67e7ed0eb3df15d9b1/R/periods.r#L195)\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/a1jzpWiksyA\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/bzo37PHCM1I\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/WWnJ5Cl-aTE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<iframe src=\"https://www.youtube.com/embed/_byYFTQHp1Y\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/M8Poajmj-HU\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/unNfE1fDFEY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/q1-QUFJsbLA\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/puvaJtv9gQw\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n01:09:37\tRon Legere:\thttps://en.wikipedia.org/wiki/Composition_over_inheritance\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Trade-offs\n---\n\n## Learning objectives:\n\n- Understand the Trade-offs between S3, R6 and S4\n\n- Brief intro to S7 (the object system formerly known as R7)\n\n\n## Introduction {-}\n\n* We have three OOP systems introduced so far (S3, S4, R6) \n\n* At the current time (pre - S7?) Hadley recommends use S3 by default: It's simple and widely used throughout base R and CRAN.\n\n* If you have experience in other languages, *Resist* the temptation to use R6 even though it will feel more familiar!\n\n\n## S4 versus S3 {-}\n\n**Which functional object system to use, S3 or S4? **\n\n- **S3** is a simple and flexible system.\n \n - Good for small teams who need flexibility and immediate payoffs.\n \n - Commonly used throughout base R and CRAN \n \n - Flexibility can cause problems, more complex systems might require formal conventions\n \n\n- **S4** is a more formal, strict system. \n\n - Good for large projects and large teams\n \n - Used by Bioconductor project\n \n - Requires significant up front investment in design, but payoff is a robust system that enforces conventions.\n \n - S4 documentation is challenging to use. \n \n\n\n## R6 versus S3 {-}\n\n**R6** is built on **encapsulated objects**, rather than generic functions. \n\n\n**Big differences: general trade-offs**\n\n* A generic is a regular function so it lives in the global namespace. An R6 method belongs to an object so it lives in a local namespace. This influences how we think about naming.\n\n* R6's reference semantics allow methods to simultaneously return a value and modify an object. This solves a painful problem called \"threading state\".\n\n* You invoke an R6 method using `$`, which is an infix operator. If you set up your methods correctly you can use chains of method calls as an alternative to the pipe.\n\n## Namespacing {-}\n\n**Where methods are found?**\n\n- in S3, **Generic functions** are **global** and live in the **global namespace**\n\n - Advantage: Uniform API: `summary`, `print`, `predict` etc.\n \n - Disadvantage: Must be careful about creating new methods! Homonyms must be avoided, don't define `plot(bank_heist)`\n \n\n- in R6, **Encapsulated methods** are **local**: objects with a **scope**\n\n - Advantage: No problems with homonyms: meaning of `bank_heist$plot()` is clear and unambiguous.\n \n - Disadvantage: Lack of a uniform API, except by convention.\n \n\n## Threading state {-}\n\n\nIn S3 the challenge is to return a value and modify the object. \n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnew_stack <- function(items = list()) {\n structure(list(items = items), class = \"stack\")\n}\n\npush <- function(x, y) {\n x$items <- c(x$items, list(y))\n x\n}\n```\n:::\n\n\nNo problem with that, but what about when we want to pop a value? We need to return two things.\n\n\n::: {.cell}\n\n```{.r .cell-code}\npop <- function(x) {\n n <- length(x$items)\n \n item <- x$items[[n]]\n x$items <- x$items[-n]\n \n list(item = item, x = x)\n}\n```\n:::\n\n\nThe usage is a bit awkward:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ns <- new_stack()\ns <- push(s, 10)\ns <- push(s, 20)\n\nout <- pop(s)\n# Update state:\ns <- out$x\n\nprint(out$item)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 20\n```\n\n\n:::\n:::\n\n\n\nIn python and other languages we have structured binding to make this less awkward. R has the {zeallot} package. For more, see this vignette:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvignette('unpacking-assignment')\n```\n:::\n\n\nHowever, this is all easier in R6 due to the reference semantics!\n\n\n::: {.cell}\n\n```{.r .cell-code}\nStack <- R6::R6Class(\"Stack\", list(\n items = list(),\n push = function(x) {\n self$items <- c(self$items, x)\n invisible(self)\n },\n pop = function() {\n item <- self$items[[self$length()]]\n self$items <- self$items[-self$length()]\n item\n },\n length = function() {\n length(self$items)\n }\n))\n\ns <- Stack$new()\ns$push(10)\ns$push(20)\ns$pop()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 20\n```\n\n\n:::\n:::\n\n\n\n## Method chaining {-}\n\nUseful to compose functions from left-to-right.\n\nUse of the operators:\n\n- S3: `|>` or `%>%`\n\n- R6: `$`\n\n\n::: {.cell}\n\n```{.r .cell-code}\ns$push(44)$push(32)$pop()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 32\n```\n\n\n:::\n:::\n\n\n\n## Umm... what about S7 ? {-}\n\n\n::: {.cell}\n::: {.cell-output-display}\n\n:::\n:::\n\n\n### Primary references: {-}\n\n* Docs: <https://rconsortium.github.io/S7/>\n\n* Talk by Hadley Wickham <https://www.youtube.com/watch?v=P3FxCvSueag>\n\n## S7 briefly {-}\n\n* S7 is a 'better' version of S3 with some of the 'strictness' of S4.\n\n```\n\"A little bit more complex then S3, with almost all of the features, \nall of the payoff of S4\" - rstudio conf 2022, Hadley Wickham\n```\n* S3 + S4 = S7\n\n* Compatible with S3: S7 objects are S3 objects! Can even extend an S3 object with S7\n\n* Somewhat compatible with S4, see [compatability vignette](https://rconsortium.github.io/S7/articles/compatibility.html) for details. \n\n* Helpful error messages! \n\n* Note that it was previously called R7, but it was changed to \"S7\" to better reflect that it is functional not encapsulated! \n\n## Abbreviated introduction based on the vignette {-}\n\nTo install (it's now on CRAN): \n\n::: {.cell}\n\n```{.r .cell-code}\ninstall.packages(\"S7\")\n```\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(S7)\ndog <- new_class(\"dog\", properties = list(\n name = class_character,\n age = class_numeric\n))\ndog\n\n\n#> <S7_class>\n#> @ name : dog\n#> @ parent: <S7_object>\n#> @ properties:\n#> $ name: <character> \n#> $ age : <integer> or <double>\n```\n:::\n\n\nNote the `class_character`, these are S7 classes corresponding to the base classes.\n\nNow to use it to create an object of class _dog_:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlola <- dog(name = \"Lola\", age = 11)\nlola\n\n#> <dog>\n#> @ name: chr \"Lola\"\n#> @ age : num 11\n```\n:::\n\n\nProperties can be set/read with `@`, with automatic validation ('safety rails') based on the type!\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlola@age <- 12\nlola@age\n\n#> 12\n\nlola@age <- \"twelve\"\n\n#> Error: <dog>@age must be <integer> or <double>, not <character>\n```\n:::\n\n\nNote the helpful error message!\n\nLike S3 (and S4) S7 has generics, implemented with `new_generic` and `method` for particular methods:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nspeak <- new_generic(\"speak\", \"x\")\n\nmethod(speak, dog) <- function(x) {\n \"Woof\"\n}\n \nspeak(lola)\n\n#> [1] \"Woof\"\n```\n:::\n\n\nIf we have another class, we can implement the generic for that too:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncat <- new_class(\"cat\", properties = list(\n name = class_character,\n age = class_double\n))\nmethod(speak, cat) <- function(x) {\n \"Meow\"\n}\n\nfluffy <- cat(name = \"Fluffy\", age = 5)\nspeak(fluffy)\n\n#> [1] \"Meow\"\n```\n:::\n\n\nHelpful messages:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nspeak\n\n#> <S7_generic> speak(x, ...) with 2 methods:\n#> 1: method(speak, cat)\n#> 2: method(speak, dog)\n```\n:::\n\n\n\n\"most usage of S7 with S3 will just work\"\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmethod(print, cat) <- function(...) {\n print(\"I am a cat.\")\n}\n\nprint(fluffy)\n#> \"I am a cat\"\n```\n:::\n\n\n*For validators, inheritance, dynamic properties and more, see the [vignette!](https://rconsortium.github.io/S7/articles/S7.html)*\n\n\n## So... switch to S7 ? {-}\n\n$$\n\\huge\n\\textbf{Soon}^{tm}\n$$\n\n* Not yet... still in development! \n\n* But consider trying it out:\n\n * To stay ahead of the curve... S7 will be integrated into base R someday!\n \n * To contribute feedback to the S7 team!\n\n * To get \"almost all\" of the benefits of S4 without the complexity ! \n \n* In particular, if you have a new project that might require the complexity of S4, consider S7 instead!\n\n## OOP system comparison {-}\n\n| Characteristic | S3 | S4 | S7 | R6 |\n|-------|------|------|------|------|\n| _Package_ | base R | base R | [S7](https://rconsortium.github.io/S7/) | [R6](https://r6.r-lib.org/) |\n| _Programming type_ | Functional | Functional | Functional | Encapulated |\n| _Complexity_ | Low | High | Medium | High |\n| _Payoff_ | Low | High | High | High |\n| _Team size_ | Small | Small-large | Large | ? |\n| _Namespace_ | Global | Global? | Global? | Local |\n| _Modify in place_ | No | No | No | Yes |\n| _Method chaining_ | `|>` | `|>`? | `|>`? | `$` |\n| _Get/set component_ | `$` | `@` | `@` | `$` |\n| _Create class_ | `class()` or `structure()` with `class` argument | `setClass()` | `new_class()` | `R6Class()` |\n| _Create validator_ | `function()` | `setValidity()` or `validator` argument in `setClass()` | `validator` argument in `new_class()` | `$validate()` |\n| _Create generic_ | `UseMethod()` | `setGeneric()` | `new_generic()` | NA |\n| _Create method_ | `function()` assigned to `generic.method` | `setMethod()` | `method()` | `R6Class()` |\n| _Create object_ | `class()` or `structure()` with `class` argument or constructor function | `new()` | Use registered method function | `$new()` |\n| _Additional components_ | attributes | slots | properties | |\n| | | | | |\n\n## Meeting Videos {-}\n\n### Cohort 1 {-}\n\n<iframe src=\"https://www.youtube.com/embed/W1uc8HbyZvI\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2 {-}\n\n<iframe src=\"https://www.youtube.com/embed/bzo37PHCM1I\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3 {-}\n\n<iframe src=\"https://www.youtube.com/embed/_byYFTQHp1Y\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4 {-}\n\n<iframe src=\"https://www.youtube.com/embed/vdKDPBcOc6Y\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5 {-}\n\n<iframe src=\"https://www.youtube.com/embed/3EvqtVYTFVM\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6 {-}\n\n<iframe src=\"https://www.youtube.com/embed/vEButxFIvLw\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:11:36\tOluwafemi Oyedele:\tI have not built anything with them!!!\n00:16:31\tArthur Shaw:\thttps://cran.r-project.org/web/packages/sp/index.html\n00:19:05\tArthur Shaw:\tApparently Hadley asked the same question we're asking several years ago: https://stackoverflow.com/questions/5437238/which-packages-make-good-use-of-s4-objects\n00:19:16\tTrevin:\tHA\n00:23:54\tTrevin:\tYour audio is breaking up Federica\n01:06:58\tFederica Gazzelloni:\thttps://mastering-shiny.org/reactive-motivation.html?q=R6#event-driven\n01:07:37\tFederica Gazzelloni:\thttps://engineering-shiny.org/common-app-caveats.html?q=R6#using-r6-as-data-storage\n01:10:52\tOluwafemi Oyedele:\tThank you !!!\n```\n</details>\n\n### Cohort 7 {-}\n\n<iframe src=\"https://www.youtube.com/embed/2vxnzqWp-OU\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Big picture\n---\n\n## Learning objectives:\n\n- Become familiar with some metaprogramming principals and how they relate to each other\n- Review vocabulary associated with metaprogramming\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(rlang)\nlibrary(lobstr)\n```\n:::\n\n\n\n## Code is data\n\n- **expression** - Captured code (*call*, *symbol*, *constant*, or *pairlist*)\n- Use `rlang::expr()`[^1] to capture code directly\n\n\n::: {.cell}\n\n```{.r .cell-code}\nexpr(mean(x, na.rm = TRUE))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mean(x, na.rm = TRUE)\n```\n\n\n:::\n:::\n\n\n- Use `rlang::enexpr()` to capture code indirectly\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncapture_it <- function(x) { # 'automatically quotes first argument'\n enexpr(x)\n}\ncapture_it(a + b + c)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a + b + c\n```\n\n\n:::\n:::\n\n\n- 'Captured' code can be modified (like a list)!\n - First element is the function, next elements are the arguments\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf <- expr(f(x = 1, y = 2))\nnames(f)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"\" \"x\" \"y\"\n```\n\n\n:::\n\n```{.r .cell-code}\nff <- fff <- f # Create two copies\n\nff$z <- 3 # Add an argument to one\nfff[[2]] <- NULL # Remove an argument from another\n\nf\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> f(x = 1, y = 2)\n```\n\n\n:::\n\n```{.r .cell-code}\nff\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> f(x = 1, y = 2, z = 3)\n```\n\n\n:::\n\n```{.r .cell-code}\nfff\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> f(y = 2)\n```\n\n\n:::\n:::\n\n\n> More on this next week!\n\n[^1]: Equivalent to `base::bquote()`\n\n## Code is a tree\n\n- **Abstract syntax tree** (AST) - Almost every language represents code as a tree\n- Use `lobstr::ast()` to inspect these code trees\n\n\n::: {.cell}\n\n```{.r .cell-code}\nast(f1(f2(a, b), f3(1)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─f1 \n#> ├─█─f2 \n#> │ ├─a \n#> │ └─b \n#> └─█─f3 \n#> └─1\n```\n\n\n:::\n\n```{.r .cell-code}\nast(1 + 2 * 3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─`+` \n#> ├─1 \n#> └─█─`*` \n#> ├─2 \n#> └─3\n```\n\n\n:::\n:::\n\n\n\n## Code can generate code\n\n- `rlang::call2()` creates function call\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncall2(\"f\", 1, 2, 3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> f(1, 2, 3)\n```\n\n\n:::\n:::\n\n\n- Going backwards from the tree, can use functions to create calls\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncall2(\"f1\", call2(\"f2\", \"a\", \"b\"), call2(\"f3\", 1))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> f1(f2(\"a\", \"b\"), f3(1))\n```\n\n\n:::\n\n```{.r .cell-code}\ncall2(\"+\", 1, call2(\"*\", 2, 3))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 1 + 2 * 3\n```\n\n\n:::\n:::\n\n\n- `!!` bang-bang - **unquote operator**\n - inserts previously defined expressions into the current one\n\n\n::: {.cell}\n\n```{.r .cell-code}\nxx <- expr(x + x)\nyy <- expr(y + y)\nexpr(xx / yy) # Nope!\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> xx/yy\n```\n\n\n:::\n\n```{.r .cell-code}\nexpr(!!xx / !!yy) # Yup!\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> (x + x)/(y + y)\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncv <- function(var) {\n var <- enexpr(var) # Get user's expression\n expr(sd(!!var) / mean(!!var)) # Insert user's expression\n}\n\ncv(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> sd(x)/mean(x)\n```\n\n\n:::\n\n```{.r .cell-code}\ncv(x + y)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> sd(x + y)/mean(x + y)\n```\n\n\n:::\n:::\n\n\n- Avoid `paste()` for building code\n - Problems with non-syntactic names and precedence among expressions\n\n> \"You might think this is an esoteric concern, but not worrying about it when generating SQL code in web applications led to SQL injection attacks that have collectively cost billions of dollars.\"\n\n## Evaluation runs code\n\n- **evaluate** - run/execute an expression\n- need both expression and environment\n- `eval()` uses current environment if not set\n- manual evaluation means you can tweak the environment!\n\n\n::: {.cell}\n\n```{.r .cell-code}\nxy <- expr(x + y)\n\neval(xy, env(x = 1, y = 10))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 11\n```\n\n\n:::\n\n```{.r .cell-code}\neval(xy, env(x = 2, y = 100))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 102\n```\n\n\n:::\n:::\n\n\n\n## Customizing evaluations with functions\n- Can also bind names to functions in supplied environment\n- Allows overriding function behaviour\n- This is how dplyr generates SQL for working with databases\n\nFor example...\n\n::: {.cell}\n\n```{.r .cell-code}\nstring_math <- function(x) {\n e <- env(\n caller_env(),\n `+` = function(x, y) paste(x, y),\n `*` = function(x, y) strrep(x, y)\n )\n\n eval(enexpr(x), e)\n}\n\ncohort <- 9\nstring_math(\"Hello\" + \"cohort\" + cohort)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"Hello cohort 9\"\n```\n\n\n:::\n\n```{.r .cell-code}\nstring_math((\"dslc\" + \"is\" + \"awesome---\") * cohort)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"dslc is awesome---dslc is awesome---dslc is awesome---dslc is awesome---dslc is awesome---dslc is awesome---dslc is awesome---dslc is awesome---dslc is awesome---\"\n```\n\n\n:::\n:::\n\n\n\n## Customizing evaluation with data\n\n- Look for variables inside data frame\n- **Data mask** - typically a data frame\n- use `rlang::eval_tidy()` rather than `eval()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndf <- data.frame(x = 1:5, y = sample(5))\neval_tidy(expr(x + y), df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 4 7 4 6 9\n```\n\n\n:::\n:::\n\n\nCatch user input with `enexpr()`...\n\n\n::: {.cell}\n\n```{.r .cell-code}\nwith2 <- function(df, expr) {\n eval_tidy(enexpr(expr), df)\n}\n\nwith2(df, x + y)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 4 7 4 6 9\n```\n\n\n:::\n:::\n\n\nBut there's a bug!\n\n- Evaluates in environment inside `with2()`, but the expression likely refers\n to objects in the Global environment\n \n\n::: {.cell}\n\n```{.r .cell-code}\nwith2 <- function(df, expr) {\n a <- 1000\n eval_tidy(enexpr(expr), df)\n}\n\ndf <- data.frame(x = 1:3)\na <- 10\nwith2(df, x + a)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1001 1002 1003\n```\n\n\n:::\n:::\n\n\n- Solved with Quosures...\n \n## Quosures\n\n- **Quosures** bundles expression with an environment\n- Use `enquo()` instead of `enexpr()` (with `eval_tidy()`)\n\n\n::: {.cell}\n\n```{.r .cell-code}\nwith2 <- function(df, expr) {\n a <- 1000\n eval_tidy(enquo(expr), df)\n}\n\ndf <- data.frame(x = 1:3)\na <- 10\nwith2(df, x + a)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 11 12 13\n```\n\n\n:::\n:::\n\n\n> \"Whenever you use a data mask, you must always use `enquo()` instead of `enexpr()`.\n\nThis comes back in Chapter 20.\n\n### Which environment is bundled?\n- The environment where the expression is created (i.e. the parent of where\n `enquo()` is called)\n\nHere, the global environment\n\n\n::: {.cell}\n\n```{.r .cell-code}\nwith2 <- function(df, expr) {\n a <- 1000\n eq <- enquo(expr)\n message(\"with2() Parent/Calling environment: \")\n print(rlang::caller_env())\n message(\"with2() environment: \")\n print(rlang::current_env())\n message(\"Quosure details: \")\n print(eq) # Print the details of the quosure\n eval_tidy(eq, df)\n}\n\na <- 10000\ndf <- data.frame(x = 1:3)\nwith2(df, x + a)\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> with2() Parent/Calling environment:\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: R_GlobalEnv>\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> with2() environment:\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: 0x000001c9abd33460>\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Quosure details:\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <quosure>\n#> expr: ^x + a\n#> env: global\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 10001 10002 10003\n```\n\n\n:::\n:::\n\n\n\nHere, the `fun1()` environment\n\n::: {.cell}\n\n```{.r .cell-code}\nfun1 <- function(df) {\n a <- 10\n message(\"fun1() Parent/Calling environment: \")\n print(rlang::caller_env())\n message(\"fun1() environment: \")\n print(rlang::current_env())\n with2(df, x + a)\n}\n\na <- 10000\ndf <- data.frame(x = 1:3)\nfun1(df)\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> fun1() Parent/Calling environment:\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: R_GlobalEnv>\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> fun1() environment:\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: 0x000001c9a4d3e0e8>\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> with2() Parent/Calling environment:\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: 0x000001c9a4d3e0e8>\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> with2() environment:\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: 0x000001c9a4d50b60>\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Quosure details:\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <quosure>\n#> expr: ^x + a\n#> env: 0x000001c9a4d3e0e8\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 11 12 13\n```\n\n\n:::\n:::\n\n\n\n\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/10gRbFMoh7g\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/vKKDU6x3BE8\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/5RLCRFli6QI\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/9MDC12hgOWQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/FSm2_TJmhm0\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/Ddd_43gw8nA\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:32:31\tOluwafemi Oyedele:\tWhen should eval_tidy() be used instead of eval()?\nbase::eval() is sufficient for simple evaluation. Use eval_tidy() when you'd like to support expressions referring to the .data pronoun, or when you need to support quosures.\n00:37:08\tTrevin (he/him):\thttps://rlang.r-lib.org/reference/topic-defuse.html\n00:38:38\tFederica Gazzelloni:\thttps://rlang.r-lib.org/reference/eval_tidy.html\n00:39:57\tArthur Shaw:\tTidy eval book: https://bookdown.dongzhuoer.com/tidyverse/tidyeval/\n00:40:14\tArthur Shaw:\tAlso very useful resource: https://dplyr.tidyverse.org/articles/programming.html\n00:40:28\tTrevin (he/him):\thttps://ggplot2.tidyverse.org/reference/aes.html\n00:40:37\tFederica Gazzelloni:\thttps://ggplot2.tidyverse.org/reference/tidyeval.html\n00:41:22\tOluwafemi Oyedele:\tIt is Tidyverse design\n00:49:13\tFederica Gazzelloni:\thttps://www.youtube.com/watch?v=2NixH3QAerQ&list=PL3x6DOfs2NGi9lH7q-phZlPrl6HKXYDbn&index=15\n00:50:13\tFederica Gazzelloni:\tMinute: 17:04\n00:54:03\tFederica Gazzelloni:\tcon <- DBI::dbConnect(RSQLite::SQLite(), filename = \":memory:\")\n00:54:18\tFederica Gazzelloni:\tDBI::dbDisconnect(con)\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/MX2vNlvIUFo\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:11:09\tRyan Honomichl:\thttps://medium.com/analytics-vidhya/become-a-better-r-programmer-with-the-awesome-lobstr-package-af97fcd22602\n00:33:03\tRyan Honomichl:\thttps://rlang.r-lib.org/reference/enquo.html\n00:37:30\tRyan Honomichl:\thttps://rlang.r-lib.org/reference/topic-multiple-columns.html\n00:41:00\tRyan Honomichl:\tbrb\n00:44:37\tRon Legere:\thttps://www.rdocumentation.org/packages/srvyr/versions/1.2.0\n00:44:58\tRon Legere:\thttp://gdfe.co/srvyr/\n00:51:51\tStone:\thttps://cran.r-project.org/web/packages/data.table/vignettes/datatable-intro.html\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Expressions\n---\n\n## Learning objectives:\n\n* Understand the idea of the abstract syntax tree (AST). \n* Discuss the data structures that underlie the AST:\n * Constants\n * Symbols\n * Calls\n* Explore the idea behind parsing.\n* Explore some details of R's grammar.\n* Discuss the use or recursive functions to compute on the language.\n* Work with three other more specialized data structures:\n * Pairlists\n * Missing arguments\n * Expression vectors\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(rlang)\nlibrary(lobstr)\n```\n:::\n\n\n## Introduction\n\n> To compute on the language, we first need to understand its structure.\n\n* This requires a few things:\n * New vocabulary.\n * New tools to inspect and modify expressions.\n * Approach the use of the language with new ways of thinking.\n* One of the first new ways of thinking is the distinction between an operation and its result.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ny <- x * 10\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error: object 'x' not found\n```\n\n\n:::\n:::\n\n\n* We can capture the intent of the code without executing it using the rlang package.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nz <- rlang::expr(y <- x * 10)\n\nz\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> y <- x * 10\n```\n\n\n:::\n:::\n\n\n* We can then evaluate the expression using the **base::eval** function.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- 4\n\nbase::eval(expr(y <- x * 10))\n\ny\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 40\n```\n\n\n:::\n:::\n\n\n### Evaluating multiple expressions \n\n* The function `expression()` allows for multiple expressions, and in some ways it acts similarly to the way files are `source()`d in. That is, we `eval()`uate all of the expressions at once.\n\n* `expression()` returns a vector and can be passed to `eval()`.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nz <- expression(x <- 4, x * 10)\n\neval(z)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 40\n```\n\n\n:::\n\n```{.r .cell-code}\nis.atomic(z)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] FALSE\n```\n\n\n:::\n\n```{.r .cell-code}\nis.vector(z)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n* `exprs()` does not evaluate everything at once. To evaluate each expression, the individual expressions must be evaluated in a loop.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nfor (i in exprs(x <- 4, x * 10)) {\nprint(i)\nprint(eval(i))\n}\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x <- 4\n#> [1] 4\n#> x * 10\n#> [1] 40\n```\n\n\n:::\n:::\n\n\n## Abstract Syntax Tree (AST)\n\n* Expressions are objects that capture the structure of code without evaluating it.\n* Expressions are also called abstract syntax trees (ASTs) because the structure of code is hierarchical and can be naturally represented as a tree. \n* Understanding this tree structure is crucial for inspecting and modifying expressions.\n * Branches = Calls\n * Leaves = Symbols and constants\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf(x, \"y\", 1)\n```\n:::\n\n\n\n\n### With `lobstr::ast():`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(f(x, \"y\", 1))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─f \n#> ├─x \n#> ├─\"y\" \n#> └─1\n```\n\n\n:::\n:::\n\n\n* Some functions might also contain more calls like the example below:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf(g(1, 2), h(3, 4, i())):\n```\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(f(g(1, 2), h(3, 4, i())))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─f \n#> ├─█─g \n#> │ ├─1 \n#> │ └─2 \n#> └─█─h \n#> ├─3 \n#> ├─4 \n#> └─█─i\n```\n\n\n:::\n:::\n\n* Read the **hand-drawn diagrams** from left-to-right (ignoring vertical position)\n* Read the **lobstr-drawn diagrams** from top-to-bottom (ignoring horizontal position).\n* The depth within the tree is determined by the nesting of function calls. \n* Depth also determines evaluation order, **as evaluation generally proceeds from deepest-to-shallowest, but this is not guaranteed because of lazy evaluation**.\n\n### Infix calls\n\n> Every call in R can be written in tree form because any call can be written in prefix form.\n\nAn infix operator is a function where the function name is placed between its arguments. Prefix form is when then function name comes before the arguments, which are enclosed in parentheses. [Note that the name infix comes from the words prefix and suffix.]\n\n\n::: {.cell}\n\n```{.r .cell-code}\ny <- x * 10\n`<-`(y, `*`(x, 10))\n```\n:::\n\n\n* A characteristic of the language is that infix functions can always be written as prefix functions; therefore, all function calls can be represented using an AST.\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(y <- x * 10)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─`<-` \n#> ├─y \n#> └─█─`*` \n#> ├─x \n#> └─10\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(`<-`(y, `*`(x, 10)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─`<-` \n#> ├─y \n#> └─█─`*` \n#> ├─x \n#> └─10\n```\n\n\n:::\n:::\n\n\n* There is no difference between the ASTs for the infix version vs the prefix version, and if you generate an expression with prefix calls, R will still print it in infix form:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nrlang::expr(`<-`(y, `*`(x, 10)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> y <- x * 10\n```\n\n\n:::\n:::\n\n\n## Expression \n\n* Collectively, the data structures present in the AST are called expressions.\n* These include:\n 1. Constants\n 2. Symbols\n 3. Calls \n 4. Pairlists\n\n### Constants\n\n* Scalar constants are the simplest component of the AST. \n* A constant is either **NULL** or a **length-1** atomic vector (or scalar) \n * e.g., `TRUE`, `1L`, `2.5`, `\"x\"`, or `\"hello\"`. \n* We can test for a constant with `rlang::is_syntactic_literal()`.\n* Constants are self-quoting in the sense that the expression used to represent a constant is the same constant:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nidentical(expr(TRUE), TRUE)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\nidentical(expr(1), 1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\nidentical(expr(2L), 2L)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\nidentical(expr(\"x\"), \"x\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\nidentical(expr(\"hello\"), \"hello\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n### Symbols\n\n* A symbol represents the name of an object.\n * `x`\n * `mtcars`\n * `mean`\n* In base R, the terms symbol and name are used interchangeably (i.e., `is.name()` is identical to `is.symbol()`), but this book used symbol consistently because **\"name\"** has many other meanings.\n* You can create a symbol in two ways: \n 1. by capturing code that references an object with `expr()`.\n 2. turning a string into a symbol with `rlang::sym()`.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nexpr(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsym(\"x\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x\n```\n\n\n:::\n:::\n\n\n* A symbol can be turned back into a string with `as.character()` or `rlang::as_string()`. \n* `as_string()` has the advantage of clearly signalling that you’ll get a character vector of length 1.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nas_string(expr(x))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"x\"\n```\n\n\n:::\n:::\n\n\n* We can recognize a symbol because it is printed without quotes\n\n\n::: {.cell}\n\n```{.r .cell-code}\nexpr(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x\n```\n\n\n:::\n:::\n\n\n* `str()` tells you that it is a symbol, and `is.symbol()` is TRUE:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nstr(expr(x))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> symbol x\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nis.symbol(expr(x))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n* The symbol type is not vectorised, i.e., a symbol is always length 1. \n* If you want multiple symbols, you’ll need to put them in a list, using `rlang::syms()`.\n\nNote that `as_string()` will not work on expressions which are not symbols.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nas_string(expr(x+y))\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error in `as_string()`:\n#> ! Can't convert a call to a string.\n```\n\n\n:::\n:::\n\n\n\n### Calls\n\n* A call object represents a captured function call. \n* Call objects are a special type of list. \n * The first component specifies the function to call (usually a symbol, i.e., the name fo the function). \n * The remaining elements are the arguments for that call. \n* Call objects create branches in the AST, because calls can be nested inside other calls.\n* You can identify a call object when printed because it looks just like a function call. \n* Confusingly `typeof()` and `str()` print language for call objects (where we might expect it to return that it is a \"call\" object), but `is.call()` returns TRUE:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(read.table(\"important.csv\", row.names = FALSE))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─read.table \n#> ├─\"important.csv\" \n#> └─row.names = FALSE\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- expr(read.table(\"important.csv\", row.names = FALSE))\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntypeof(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"language\"\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nis.call(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n### Subsetting\n\n* Calls generally behave like lists.\n* Since they are list-like, you can use standard subsetting tools. \n* The first element of the call object is the function to call, which is usually a symbol:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx[[1]]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> read.table\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nis.symbol(x[[1]])\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n* The remainder of the elements are the arguments:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nis.symbol(x[-1])\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] FALSE\n```\n\n\n:::\n\n```{.r .cell-code}\nas.list(x[-1])\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> [1] \"important.csv\"\n#> \n#> $row.names\n#> [1] FALSE\n```\n\n\n:::\n:::\n\n* We can extract individual arguments with [[ or, if named, $:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx[[2]]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"important.csv\"\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx$row.names\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] FALSE\n```\n\n\n:::\n:::\n\n\n* We can determine the number of arguments in a call object by subtracting 1 from its length:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlength(x) - 1\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2\n```\n\n\n:::\n:::\n\n\n* Extracting specific arguments from calls is challenging because of R’s flexible rules for argument matching:\n * It could potentially be in any location, with the full name, with an abbreviated name, or with no name. \n\n* To work around this problem, you can use `rlang::call_standardise()` which standardizes all arguments to use the full name:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nrlang::call_standardise(x)\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning: `call_standardise()` is deprecated as of rlang 0.4.11\n#> This warning is displayed once every 8 hours.\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> read.table(file = \"important.csv\", row.names = FALSE)\n```\n\n\n:::\n:::\n\n\n* But If the function uses ... it’s not possible to standardise all arguments.\n* Calls can be modified in the same way as lists:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx$header <- TRUE\nx\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> read.table(\"important.csv\", row.names = FALSE, header = TRUE)\n```\n\n\n:::\n:::\n\n\n### Function position\n\n* The first element of the call object is the function position. This contains the function that will be called when the object is evaluated, and is usually a symbol.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(foo())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─foo\n```\n\n\n:::\n:::\n\n\n* While R allows you to surround the name of the function with quotes, the parser converts it to a symbol:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(\"foo\"())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─foo\n```\n\n\n:::\n:::\n\n\n* However, sometimes the function doesn’t exist in the current environment and you need to do some computation to retrieve it: \n * For example, if the function is in another package, is a method of an R6 object, or is created by a function factory. In this case, the function position will be occupied by another call:\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(pkg::foo(1))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─█─`::` \n#> │ ├─pkg \n#> │ └─foo \n#> └─1\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(obj$foo(1))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─█─`$` \n#> │ ├─obj \n#> │ └─foo \n#> └─1\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(foo(1)(2))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─█─foo \n#> │ └─1 \n#> └─2\n```\n\n\n:::\n:::\n\n\n\n\n### Constructing\n\n* You can construct a call object from its components using `rlang::call2()`. \n* The first argument is the name of the function to call (either as a string, a symbol, or another call).\n* The remaining arguments will be passed along to the call:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncall2(\"mean\", x = expr(x), na.rm = TRUE)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> mean(x = x, na.rm = TRUE)\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncall2(expr(base::mean), x = expr(x), na.rm = TRUE)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> base::mean(x = x, na.rm = TRUE)\n```\n\n\n:::\n:::\n\n\n* Infix calls created in this way still print as usual.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncall2(\"<-\", expr(x), 10)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x <- 10\n```\n\n\n:::\n:::\n\n\n## Parsing and grammar\n\n* **Parsing** - The process by which a computer language takes a string and constructs an expression. Parsing is governed by a set of rules known as a grammar. \n* We are going to use `lobstr::ast()` to explore some of the details of R’s grammar, and then show how you can transform back and forth between expressions and strings.\n* **Operator precedence** - Conventions used by the programming language to resolve ambiguity.\n* Infix functions introduce two sources of ambiguity.\n* The first source of ambiguity arises from infix functions: what does 1 + 2 * 3 yield? Do you get 9 (i.e., (1 + 2) * 3), or 7 (i.e., 1 + (2 * 3))? In other words, which of the two possible parse trees below does R use?\n\n\n\n* Programming languages use conventions called operator precedence to resolve this ambiguity. We can use `ast()` to see what R does:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(1 + 2 * 3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─`+` \n#> ├─1 \n#> └─█─`*` \n#> ├─2 \n#> └─3\n```\n\n\n:::\n:::\n\n\n* PEMDAS (or BEDMAS or BODMAS, depending on where in the world you grew up) is pretty clear on what to do. Other operator precedence isn't as clear. \n* There’s one particularly surprising case in R: \n * ! has a much lower precedence (i.e., it binds less tightly) than you might expect. \n * This allows you to write useful operations like:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(!x %in% y)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─`!` \n#> └─█─`%in%` \n#> ├─x \n#> └─y\n```\n\n\n:::\n:::\n\n* **R has over 30 infix operators divided into 18 precedence** groups. \n* While the details are described in `?Syntax`, very few people have memorized the complete ordering.\n* If there’s any confusion, use parentheses!\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# override PEMDAS\nlobstr::ast((1 + 2) * 3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─`*` \n#> ├─█─`(` \n#> │ └─█─`+` \n#> │ ├─1 \n#> │ └─2 \n#> └─3\n```\n\n\n:::\n:::\n\n\n### Associativity\n\n* The second source of ambiguity is introduced by repeated usage of the same infix function. \n\n\n::: {.cell}\n\n```{.r .cell-code}\n1 + 2 + 3\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 6\n```\n\n\n:::\n\n```{.r .cell-code}\n# What does R do first?\n(1 + 2) + 3\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 6\n```\n\n\n:::\n\n```{.r .cell-code}\n# or\n1 + (2 + 3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 6\n```\n\n\n:::\n:::\n\n\n* In this case it doesn't matter. Other places it might, like in `ggplot2`. \n\n* In R, most operators are left-associative, i.e., the operations on the left are evaluated first:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(1 + 2 + 3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─`+` \n#> ├─█─`+` \n#> │ ├─1 \n#> │ └─2 \n#> └─3\n```\n\n\n:::\n:::\n\n\n* There are two exceptions to the left-associative rule:\n 1. exponentiation\n 2. assignment\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(2 ^ 2 ^ 3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─`^` \n#> ├─2 \n#> └─█─`^` \n#> ├─2 \n#> └─3\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(x <- y <- z)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─`<-` \n#> ├─x \n#> └─█─`<-` \n#> ├─y \n#> └─z\n```\n\n\n:::\n:::\n\n\n### Parsing and deparsing\n\n* Parsing - turning characters you've typed into an AST (i.e., from strings to expressions).\n* R usually takes care of parsing code for us. \n* But occasionally you have code stored as a string, and you want to parse it yourself. \n* You can do so using `rlang::parse_expr()`:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx1 <- \"y <- x + 10\"\nx1\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"y <- x + 10\"\n```\n\n\n:::\n\n```{.r .cell-code}\nis.call(x1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] FALSE\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx2 <- rlang::parse_expr(x1)\nx2\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> y <- x + 10\n```\n\n\n:::\n\n```{.r .cell-code}\nis.call(x2)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n* `parse_expr()` always returns a single expression.\n* If you have multiple expression separated by `;` or `,`, you’ll need to use `rlang::parse_exprs()` which is the plural version of `rlang::parse_expr()`. It returns a list of expressions:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx3 <- \"a <- 1; a + 1\"\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nrlang::parse_exprs(x3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [[1]]\n#> a <- 1\n#> \n#> [[2]]\n#> a + 1\n```\n\n\n:::\n:::\n\n\n* If you find yourself parsing strings into expressions often, **quasiquotation** may be a safer approach.\n * More about quasiquaotation in Chapter 19.\n* The inverse of parsing is deparsing.\n* **Deparsing** - given an expression, you want the string that would generate it. \n* Deparsing happens automatically when you print an expression.\n* You can get the string with `rlang::expr_text()`:\n* Parsing and deparsing are not symmetric.\n * Parsing creates the AST which means that we lose backticks around ordinary names, comments, and whitespace.\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncat(expr_text(expr({\n # This is a comment\n x <- `x` + 1\n})))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> {\n#> x <- x + 1\n#> }\n```\n\n\n:::\n:::\n\n\n## Using the AST to solve more complicated problems\n\n* Here we focus on what we learned to perform recursion on the AST.\n* Two parts of a recursive function:\n * Recursive case: handles the nodes in the tree. Typically, you’ll do something to each child of a node, usually calling the recursive function again, and then combine the results back together again. For expressions, you’ll need to handle calls and pairlists (function arguments).\n * Base case: handles the leaves of the tree. The base cases ensure that the function eventually terminates, by solving the simplest cases directly. For expressions, you need to handle symbols and constants in the base case.\n\n\n### Two helper functions\n\n* First, we need an `epxr_type()` function to return the type of expression element as a string.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nexpr_type <- function(x) {\n if (rlang::is_syntactic_literal(x)) {\n \"constant\"\n } else if (is.symbol(x)) {\n \"symbol\"\n } else if (is.call(x)) {\n \"call\"\n } else if (is.pairlist(x)) {\n \"pairlist\"\n } else {\n typeof(x)\n }\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nexpr_type(expr(\"a\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"constant\"\n```\n\n\n:::\n\n```{.r .cell-code}\nexpr_type(expr(x))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"symbol\"\n```\n\n\n:::\n\n```{.r .cell-code}\nexpr_type(expr(f(1, 2)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"call\"\n```\n\n\n:::\n:::\n\n\n* Second, we need a wrapper function to handle exceptions.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nswitch_expr <- function(x, ...) {\n switch(expr_type(x),\n ...,\n stop(\"Don't know how to handle type \", typeof(x), call. = FALSE)\n )\n}\n```\n:::\n\n\n* Lastly, we can write a basic template that walks the AST using the `switch()` statement.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nrecurse_call <- function(x) {\n switch_expr(x,\n # Base cases\n symbol = ,\n constant = ,\n\n # Recursive cases\n call = ,\n pairlist =\n )\n}\n```\n:::\n\n\n### Specific use cases for `recurse_call()`\n\n### Example 1: Finding F and T\n\n* Using `F` and `T` in our code rather than `FALSE` and `TRUE` is bad practice.\n* Say we want to walk the AST to find times when we use `F` and `T`.\n* Start off by finding the type of `T` vs `TRUE`.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nexpr_type(expr(TRUE))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"constant\"\n```\n\n\n:::\n\n```{.r .cell-code}\nexpr_type(expr(T))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"symbol\"\n```\n\n\n:::\n:::\n\n\n* With this knowledge, we can now write the base cases of our recursive function.\n* The logic is as follows:\n * A constant is never a logical abbreviation and a symbol is an abbreviation if it is \"F\" or \"T\":\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlogical_abbr_rec <- function(x) {\n switch_expr(x,\n constant = FALSE,\n symbol = as_string(x) %in% c(\"F\", \"T\")\n )\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlogical_abbr_rec(expr(TRUE))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] FALSE\n```\n\n\n:::\n\n```{.r .cell-code}\nlogical_abbr_rec(expr(T))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n* It's best practice to write another wrapper, assuming every input you receive will be an expression.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlogical_abbr <- function(x) {\n logical_abbr_rec(enexpr(x))\n}\n\nlogical_abbr(T)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\nlogical_abbr(FALSE)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] FALSE\n```\n\n\n:::\n:::\n\n\n#### Next step: code for the recursive cases\n\n* Here we want to do the same thing for calls and for pairlists.\n* Here's the logic: recursively apply the function to each subcomponent, and return `TRUE` if any subcomponent contains a logical abbreviation.\n* This is simplified by using the `purrr::some()` function, which iterates over a list and returns `TRUE` if the predicate function is true for any element.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlogical_abbr_rec <- function(x) {\n switch_expr(x,\n # Base cases\n constant = FALSE,\n symbol = as_string(x) %in% c(\"F\", \"T\"),\n # Recursive cases\n call = ,\n # Are we sure this is the correct function to use?\n # Why not logical_abbr_rec?\n pairlist = purrr::some(x, logical_abbr_rec)\n )\n}\n\nlogical_abbr(mean(x, na.rm = T))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n\n```{.r .cell-code}\nlogical_abbr(function(x, na.rm = T) FALSE)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n### Example 2: Finding all variables created by assignment\n\n* Listing all the variables is a little more complicated. \n* Figure out what assignment looks like based on the AST.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nast(x <- 10)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─`<-` \n#> ├─x \n#> └─10\n```\n\n\n:::\n:::\n\n\n* Now we need to decide what data structure we're going to use for the results.\n * Easiest thing will be to return a character vector.\n * We would need to use a list if we wanted to return symbols.\n\n### Dealing with the base cases\n\n\n::: {.cell}\n\n```{.r .cell-code}\nfind_assign_rec <- function(x) {\n switch_expr(x,\n constant = ,\n symbol = character()\n )\n}\nfind_assign <- function(x) find_assign_rec(enexpr(x))\n\nfind_assign(\"x\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> character(0)\n```\n\n\n:::\n\n```{.r .cell-code}\nfind_assign(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> character(0)\n```\n\n\n:::\n:::\n\n\n### Dealing with the recursive cases\n\n* Here is the function to flatten pairlists.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nflat_map_chr <- function(.x, .f, ...) {\n purrr::flatten_chr(purrr::map(.x, .f, ...))\n}\n\nflat_map_chr(letters[1:3], ~ rep(., sample(3, 1)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"a\" \"b\" \"b\" \"c\" \"c\"\n```\n\n\n:::\n:::\n\n\n* Here is the code needed to identify calls.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nfind_assign_rec <- function(x) {\n switch_expr(x,\n # Base cases\n constant = ,\n symbol = character(),\n\n # Recursive cases\n pairlist = flat_map_chr(as.list(x), find_assign_rec),\n call = {\n if (is_call(x, \"<-\")) {\n as_string(x[[2]])\n } else {\n flat_map_chr(as.list(x), find_assign_rec)\n }\n }\n )\n}\n\nfind_assign(a <- 1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"a\"\n```\n\n\n:::\n\n```{.r .cell-code}\nfind_assign({\n a <- 1\n {\n b <- 2\n }\n})\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"a\" \"b\"\n```\n\n\n:::\n:::\n\n\n### Make the function more robust\n\n* Throw cases at it that we think might break the function. \n* Write a function to handle these cases.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nfind_assign_call <- function(x) {\n if (is_call(x, \"<-\") && is_symbol(x[[2]])) {\n lhs <- as_string(x[[2]])\n children <- as.list(x)[-1]\n } else {\n lhs <- character()\n children <- as.list(x)\n }\n\n c(lhs, flat_map_chr(children, find_assign_rec))\n}\n\nfind_assign_rec <- function(x) {\n switch_expr(x,\n # Base cases\n constant = ,\n symbol = character(),\n\n # Recursive cases\n pairlist = flat_map_chr(x, find_assign_rec),\n call = find_assign_call(x)\n )\n}\n\nfind_assign(a <- b <- c <- 1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"a\" \"b\" \"c\"\n```\n\n\n:::\n\n```{.r .cell-code}\nfind_assign(system.time(x <- print(y <- 5)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"x\" \"y\"\n```\n\n\n:::\n:::\n\n\n* This approach certainly is more complicated, but it's important to start simple and move up.\n\n## Specialised data structures\n\n* Pairlists\n* Missing arguments \n* Expression vectors\n\n### Pairlists\n\n* Pairlists are a remnant of R’s past and have been replaced by lists almost everywhere. \n* The only place you are likely to see pairlists in R is when working with calls to the function, as the formal arguments to a function are stored in a pairlist:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf <- expr(function(x, y = 10) x + y)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nargs <- f[[2]]\nargs\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $x\n#> \n#> \n#> $y\n#> [1] 10\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntypeof(args)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"pairlist\"\n```\n\n\n:::\n:::\n\n* Fortunately, whenever you encounter a pairlist, you can treat it just like a regular list:\n\n\n::: {.cell}\n\n```{.r .cell-code}\npl <- pairlist(x = 1, y = 2)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlength(pl)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\npl$x\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1\n```\n\n\n:::\n:::\n\n\n### Missing arguments\n\n* Empty symbols\n* To create an empty symbol, you need to use `missing_arg()` or `expr()`.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmissing_arg()\n```\n\n```{.r .cell-code}\ntypeof(missing_arg())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"symbol\"\n```\n\n\n:::\n:::\n\n\n* Empty symbols don't print anything.\n * To check, we need to use `rlang::is_missing()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nis_missing(missing_arg())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n* These are usually present in function formals:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf <- expr(function(x, y = 10) x + y)\n\nargs <- f[[2]]\n\n\nis_missing(args[[1]])\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n### Expression vectors\n\n* An expression vector is just a list of expressions.\n * The only difference is that calling `eval()` on an expression evaluates each individual expression. \n * Instead, it might be more advantageous to use a list of expressions.\n\n* Expression vectors are only produced by two base functions: \n `expression()` and `parse()`:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nexp1 <- parse(text = c(\" \nx <- 4\nx\n\"))\nexp1\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> expression(x <- 4, x)\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nexp2 <- expression(x <- 4, x)\nexp2\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> expression(x <- 4, x)\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntypeof(exp1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"expression\"\n```\n\n\n:::\n\n```{.r .cell-code}\ntypeof(exp2)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"expression\"\n```\n\n\n:::\n:::\n\n\n\n- Like calls and pairlists, expression vectors behave like lists:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlength(exp1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2\n```\n\n\n:::\n\n```{.r .cell-code}\nexp1[[1]]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x <- 4\n```\n\n\n:::\n:::\n\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/2NixH3QAerQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/mYOUgzoRcjI\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/5RLCRFli6QI\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<iframe src=\"https://www.youtube.com/embed/F8df5PMNC8Y\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/tSVBlAP5DIY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/Jc_R4yFsYeE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/K8w28ee3CR8\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/XPs-TI4BYjk\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<iframe src=\"https://www.youtube.com/embed/8LPw_VTBsmQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary>Meeting chat log</summary>\n```\n00:50:48\tStone:\thttps://www.r-bloggers.com/2018/10/quasiquotation-in-r-via-bquote/\n00:58:26\tiPhone:\tSee ya next week!\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Quasiquotation\n---\n\n## Learning objectives:\n\n- What quasiquotation means\n- Why it's important\n- Learn some practical uses\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(rlang)\nlibrary(purrr)\n```\n:::\n\n\n## Introduction\n\nThree pillars of *tidy* evaluation\n\n 1. Quasiquotation\n 2. Quosures (chapter 20)\n 3. Data masks (Chapter 20)\n\n**Quasiquotation = quotation + unquotation**\n\n- **Quote.** Capture unevaluated expression... (\"defuse\") \n- **Unquote.** Evaluate selections of quoted expression! (\"inject\")\n- Functions that use these features are said to use Non-standard evaluation (NSE)\n- Note: related to Lisp macros, and also exists in other languages with Lisp heritage, e.g. Julia\n\n> On it's own, Quasiquotation good for programming, but combined with other tools, \n> important for data analysis.\n\n## Motivation\n\nSimple *concrete* example:\n\n`cement()` is a function that works like `paste()` but doesn't need need quotes\n\n(Think of automatically adding 'quotes' to the arguments)\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncement <- function(...) {\n args <- ensyms(...)\n paste(purrr::map(args, as_string), collapse = \" \")\n}\n\ncement(Good, morning, Hadley)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"Good morning Hadley\"\n```\n\n\n:::\n:::\n\n\nWhat if we wanted to use variables? What is an object and what should be quoted?\n\nThis is where 'unquoting' comes in!\n\n\n::: {.cell}\n\n```{.r .cell-code}\nname <- \"Bob\"\ncement(Good, afternoon, !!name) # Bang-bang!\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"Good afternoon Bob\"\n```\n\n\n:::\n:::\n\n\n## Vocabulary {-}\n\nCan think of `cement()` and `paste()` as being 'mirror-images' of each other.\n\n- `paste()` - define what to quote - **Evaluates** arguments\n- `cement()` - define what to unquote - **Quotes** arguments\n\n**Quoting function** similar to, but more precise than, **Non-standard evaluation (NSE)**\n\n- Tidyverse functions - e.g., `dplyr::mutate()`, `tidyr::pivot_longer()`\n- Base functions - e.g., `library()`, `subset()`, `with()`\n\n**Quoting function** arguments cannot be evaluated outside of function:\n\n::: {.cell}\n\n```{.r .cell-code}\ncement(Good, afternoon, Cohort) # No problem\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"Good afternoon Cohort\"\n```\n\n\n:::\n\n```{.r .cell-code}\nGood # Error!\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error: object 'Good' not found\n```\n\n\n:::\n:::\n\n\n**Non-quoting (standard) function** arguments can be evaluated:\n\n::: {.cell}\n\n```{.r .cell-code}\npaste(\"Good\", \"afternoon\", \"Cohort\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"Good afternoon Cohort\"\n```\n\n\n:::\n\n```{.r .cell-code}\n\"Good\"\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"Good\"\n```\n\n\n:::\n:::\n\n\n\n## Quoting\n\n**Capture expressions without evaluating them**\n\n\n::: {.cell}\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Warning in body[[col]][rows][!is.na(result)] <- omit_na(result): number of\n#> items to replace is not a multiple of replacement length\n```\n\n\n:::\n\n::: {.cell-output-display}\n\n```{=html}\n<div id=\"mswiutofea\" 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hidden;\n}\n\n#mswiutofea .gt_column_spanner_outer {\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: normal;\n text-transform: inherit;\n padding-top: 0;\n padding-bottom: 0;\n padding-left: 4px;\n padding-right: 4px;\n}\n\n#mswiutofea .gt_column_spanner_outer:first-child {\n padding-left: 0;\n}\n\n#mswiutofea .gt_column_spanner_outer:last-child {\n padding-right: 0;\n}\n\n#mswiutofea .gt_column_spanner {\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n vertical-align: bottom;\n padding-top: 5px;\n padding-bottom: 5px;\n overflow-x: hidden;\n display: inline-block;\n width: 100%;\n}\n\n#mswiutofea .gt_spanner_row {\n border-bottom-style: hidden;\n}\n\n#mswiutofea .gt_group_heading {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: bold;\n text-transform: inherit;\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 1px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 1px;\n border-right-color: #D3D3D3;\n vertical-align: middle;\n text-align: left;\n}\n\n#mswiutofea .gt_empty_group_heading {\n padding: 0.5px;\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: bold;\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n vertical-align: middle;\n}\n\n#mswiutofea .gt_from_md > :first-child {\n margin-top: 0;\n}\n\n#mswiutofea .gt_from_md > :last-child {\n margin-bottom: 0;\n}\n\n#mswiutofea .gt_row {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n margin: 10px;\n border-top-style: solid;\n border-top-width: 1px;\n border-top-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 1px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 1px;\n border-right-color: #D3D3D3;\n vertical-align: middle;\n overflow-x: hidden;\n}\n\n#mswiutofea .gt_stub {\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: initial;\n text-transform: inherit;\n border-right-style: solid;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#mswiutofea .gt_stub_row_group {\n color: #333333;\n background-color: #FFFFFF;\n font-size: 100%;\n font-weight: initial;\n text-transform: inherit;\n border-right-style: solid;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n padding-left: 5px;\n padding-right: 5px;\n vertical-align: top;\n}\n\n#mswiutofea .gt_row_group_first td {\n border-top-width: 2px;\n}\n\n#mswiutofea .gt_row_group_first th {\n border-top-width: 2px;\n}\n\n#mswiutofea .gt_summary_row {\n color: #333333;\n background-color: #FFFFFF;\n text-transform: inherit;\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#mswiutofea .gt_first_summary_row {\n border-top-style: solid;\n border-top-color: #D3D3D3;\n}\n\n#mswiutofea .gt_first_summary_row.thick {\n border-top-width: 2px;\n}\n\n#mswiutofea .gt_last_summary_row {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n}\n\n#mswiutofea .gt_grand_summary_row {\n color: #333333;\n background-color: #FFFFFF;\n text-transform: inherit;\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#mswiutofea .gt_first_grand_summary_row {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n border-top-style: double;\n border-top-width: 6px;\n border-top-color: #D3D3D3;\n}\n\n#mswiutofea .gt_last_grand_summary_row_top {\n padding-top: 8px;\n padding-bottom: 8px;\n padding-left: 5px;\n padding-right: 5px;\n border-bottom-style: double;\n border-bottom-width: 6px;\n border-bottom-color: #D3D3D3;\n}\n\n#mswiutofea .gt_striped {\n background-color: rgba(128, 128, 128, 0.05);\n}\n\n#mswiutofea .gt_table_body {\n border-top-style: solid;\n border-top-width: 2px;\n border-top-color: #D3D3D3;\n border-bottom-style: solid;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n}\n\n#mswiutofea .gt_footnotes {\n color: #333333;\n background-color: #FFFFFF;\n border-bottom-style: none;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 2px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n}\n\n#mswiutofea .gt_footnote {\n margin: 0px;\n font-size: 90%;\n padding-top: 4px;\n padding-bottom: 4px;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#mswiutofea .gt_sourcenotes {\n color: #333333;\n background-color: #FFFFFF;\n border-bottom-style: none;\n border-bottom-width: 2px;\n border-bottom-color: #D3D3D3;\n border-left-style: none;\n border-left-width: 2px;\n border-left-color: #D3D3D3;\n border-right-style: none;\n border-right-width: 2px;\n border-right-color: #D3D3D3;\n}\n\n#mswiutofea .gt_sourcenote {\n font-size: 90%;\n padding-top: 4px;\n padding-bottom: 4px;\n padding-left: 5px;\n padding-right: 5px;\n}\n\n#mswiutofea .gt_left {\n text-align: left;\n}\n\n#mswiutofea .gt_center {\n text-align: center;\n}\n\n#mswiutofea .gt_right {\n text-align: right;\n font-variant-numeric: tabular-nums;\n}\n\n#mswiutofea .gt_font_normal {\n font-weight: normal;\n}\n\n#mswiutofea .gt_font_bold {\n font-weight: bold;\n}\n\n#mswiutofea .gt_font_italic {\n font-style: italic;\n}\n\n#mswiutofea .gt_super {\n font-size: 65%;\n}\n\n#mswiutofea .gt_footnote_marks {\n font-size: 75%;\n vertical-align: 0.4em;\n position: initial;\n}\n\n#mswiutofea .gt_asterisk {\n font-size: 100%;\n vertical-align: 0;\n}\n\n#mswiutofea .gt_indent_1 {\n text-indent: 5px;\n}\n\n#mswiutofea .gt_indent_2 {\n text-indent: 10px;\n}\n\n#mswiutofea .gt_indent_3 {\n text-indent: 15px;\n}\n\n#mswiutofea .gt_indent_4 {\n text-indent: 20px;\n}\n\n#mswiutofea .gt_indent_5 {\n text-indent: 25px;\n}\n\n#mswiutofea .katex-display {\n display: inline-flex !important;\n margin-bottom: 0.75em !important;\n}\n\n#mswiutofea div.Reactable > div.rt-table > div.rt-thead > div.rt-tr.rt-tr-group-header > div.rt-th-group:after {\n height: 0px !important;\n}\n</style>\n<table class=\"gt_table\" style=\"table-layout:fixed;\" data-quarto-disable-processing=\"false\" data-quarto-bootstrap=\"false\">\n <colgroup>\n <col style=\"width:100px;\"/>\n <col/>\n <col/>\n </colgroup>\n <thead>\n <tr class=\"gt_col_headings\">\n <th class=\"gt_col_heading gt_columns_bottom_border gt_left\" rowspan=\"1\" colspan=\"1\" style=\"text-align: center; font-weight: bold;\" scope=\"col\" id=\"t\"></th>\n <th class=\"gt_col_heading gt_columns_bottom_border gt_center\" rowspan=\"1\" colspan=\"1\" style=\"text-align: center; font-weight: bold;\" scope=\"col\" id=\"Developer\">Developer</th>\n <th class=\"gt_col_heading gt_columns_bottom_border gt_center\" rowspan=\"1\" colspan=\"1\" style=\"text-align: center; font-weight: bold;\" scope=\"col\" id=\"User\">User</th>\n </tr>\n </thead>\n <tbody class=\"gt_table_body\">\n <tr class=\"gt_group_heading_row\">\n <th colspan=\"3\" class=\"gt_group_heading\" scope=\"colgroup\" id=\"Expression (Quasiquotation)\">Expression (Quasiquotation)</th>\n </tr>\n <tr class=\"gt_row_group_first\"><td headers=\"Expression (Quasiquotation) t\" class=\"gt_row gt_left\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: solid; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: hidden; border-bottom-color: #000000;\"><span data-qmd-base64=\"T25l\"><span class='gt_from_md'>One</span></span></td>\n<td headers=\"Expression (Quasiquotation) Developer\" class=\"gt_row gt_center\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: solid; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: hidden; border-bottom-color: #000000;\"><span data-qmd-base64=\"YGV4cHIoKWA=\"><span class='gt_from_md'><code>expr()</code></span></span></td>\n<td headers=\"Expression (Quasiquotation) User\" class=\"gt_row gt_center\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: solid; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: hidden; border-bottom-color: #000000;\"><span data-qmd-base64=\"YGVuZXhwcigpYA==\"><span class='gt_from_md'><code>enexpr()</code></span></span></td></tr>\n <tr><td headers=\"Expression (Quasiquotation) t\" class=\"gt_row gt_left\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: hidden; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: #000000;\"><span data-qmd-base64=\"TWFueQ==\"><span class='gt_from_md'>Many</span></span></td>\n<td headers=\"Expression (Quasiquotation) Developer\" class=\"gt_row gt_center\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: hidden; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: #000000;\"><span data-qmd-base64=\"YGV4cHJzKClg\"><span class='gt_from_md'><code>exprs()</code></span></span></td>\n<td headers=\"Expression (Quasiquotation) User\" class=\"gt_row gt_center\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: hidden; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: #000000;\"><span data-qmd-base64=\"YGVuZXhwcnMoKWA=\"><span class='gt_from_md'><code>enexprs()</code></span></span></td></tr>\n <tr class=\"gt_group_heading_row\">\n <th colspan=\"3\" class=\"gt_group_heading\" scope=\"colgroup\" id=\"Symbol (Quasiquotation)\">Symbol (Quasiquotation)</th>\n </tr>\n <tr class=\"gt_row_group_first\"><td headers=\"Symbol (Quasiquotation) t\" class=\"gt_row gt_left\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: solid; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: hidden; border-bottom-color: #000000;\"><span data-qmd-base64=\"T25l\"><span class='gt_from_md'>One</span></span></td>\n<td headers=\"Symbol (Quasiquotation) Developer\" class=\"gt_row gt_center\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: solid; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: hidden; border-bottom-color: #000000;\"><span data-qmd-base64=\"YGV4cHIoKWA=\"><span class='gt_from_md'><code>expr()</code></span></span></td>\n<td headers=\"Symbol (Quasiquotation) User\" class=\"gt_row gt_center\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: solid; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: hidden; border-bottom-color: #000000;\"><span data-qmd-base64=\"YGVuc3ltKClg\"><span class='gt_from_md'><code>ensym()</code></span></span></td></tr>\n <tr><td headers=\"Symbol (Quasiquotation) t\" class=\"gt_row gt_left\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: hidden; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: hidden; border-bottom-color: #000000;\"><span data-qmd-base64=\"TWFueQ==\"><span class='gt_from_md'>Many</span></span></td>\n<td headers=\"Symbol (Quasiquotation) Developer\" class=\"gt_row gt_center\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: hidden; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: hidden; border-bottom-color: #000000;\"><span data-qmd-base64=\"YGV4cHJzKClg\"><span class='gt_from_md'><code>exprs()</code></span></span></td>\n<td headers=\"Symbol (Quasiquotation) User\" class=\"gt_row gt_center\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: hidden; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: hidden; border-bottom-color: #000000;\"><span data-qmd-base64=\"YGVuc3ltcygpYA==\"><span class='gt_from_md'><code>ensyms()</code></span></span></td></tr>\n <tr class=\"gt_group_heading_row\">\n <th colspan=\"3\" class=\"gt_group_heading\" scope=\"colgroup\" id=\"R Base (Quotation)\">R Base (Quotation)</th>\n </tr>\n <tr class=\"gt_row_group_first\"><td headers=\"R Base (Quotation) t\" class=\"gt_row gt_left\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: solid; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: hidden; border-bottom-color: #000000;\"><span data-qmd-base64=\"T25l\"><span class='gt_from_md'>One</span></span></td>\n<td headers=\"R Base (Quotation) Developer\" class=\"gt_row gt_center\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: solid; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: hidden; border-bottom-color: #000000;\"><span data-qmd-base64=\"YHF1b3RlKClg\"><span class='gt_from_md'><code>quote()</code></span></span></td>\n<td headers=\"R Base (Quotation) User\" class=\"gt_row gt_center\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: solid; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: hidden; border-bottom-color: #000000;\"><span data-qmd-base64=\"YGFsaXN0KClg\"><span class='gt_from_md'><code>alist()</code></span></span></td></tr>\n <tr><td headers=\"R Base (Quotation) t\" class=\"gt_row gt_left\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: hidden; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: #000000;\"><span data-qmd-base64=\"TWFueQ==\"><span class='gt_from_md'>Many</span></span></td>\n<td headers=\"R Base (Quotation) Developer\" class=\"gt_row gt_center\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: hidden; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: #000000;\"><span data-qmd-base64=\"YHN1YnN0aXR1dGUoKWA=\"><span class='gt_from_md'><code>substitute()</code></span></span></td>\n<td headers=\"R Base (Quotation) User\" class=\"gt_row gt_center\" style=\"border-left-width: 1px; border-left-style: hidden; border-left-color: #000000; border-right-width: 1px; border-right-style: hidden; border-right-color: #000000; border-top-width: 1px; border-top-style: hidden; border-top-color: #000000; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: #000000;\"><span data-qmd-base64=\"YGFzLmxpc3Qoc3Vic3RpdHV0ZSguLi4oKSkpYA==\"><span class='gt_from_md'><code>as.list(substitute(...()))</code></span></span></td></tr>\n </tbody>\n \n \n</table>\n</div>\n```\n\n:::\n:::\n\n\n- Non-base functions are from **rlang**\n- **Developer** - From you, direct, fixed, interactive\n- **User** - From the user, indirect, varying, programmatic\n\nAlso: \n\n- `bquote()` provides a limited form of quasiquotation\n- `~`, the formula, is a quoting function (see [Section 20.3.4](https://adv-r.hadley.nz/evaluation.html#quosure-impl))\n\n### `expr()` and `exprs()` {-}\n\n::: {.cell}\n\n```{.r .cell-code}\nexpr(x + y)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x + y\n```\n\n\n:::\n\n```{.r .cell-code}\nexprs(exp1 = x + y, exp2 = x * y)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $exp1\n#> x + y\n#> \n#> $exp2\n#> x * y\n```\n\n\n:::\n:::\n\n\n### `enexpr()`^[`enexpr()` = **en**rich `expr()`] and `enexprs()` {-}\n\n::: {.cell}\n\n```{.r .cell-code}\nf <- function(x) enexpr(x)\nf(a + b + c)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a + b + c\n```\n\n\n:::\n\n```{.r .cell-code}\nf2 <- function(x, y) enexprs(exp1 = x, exp2 = y)\nf2(x = a + b, y = c + d)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $exp1\n#> a + b\n#> \n#> $exp2\n#> c + d\n```\n\n\n:::\n:::\n\n\n### `ensym()` and `ensyms()` {-}\n\n- **[Remember](https://adv-r.hadley.nz/expressions.html#symbols):** Symbol represents the name of an object. Can only be length 1.\n- These are stricter than `enexpr/s()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf <- function(x) ensym(x)\nf(a)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a\n```\n\n\n:::\n\n```{.r .cell-code}\nf2 <- function(x, y) ensyms(sym1 = x, sym2 = y)\nf2(x = a, y = \"b\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> $sym1\n#> a\n#> \n#> $sym2\n#> b\n```\n\n\n:::\n:::\n\n\n\n## Unquoting\n\n**Selectively evaluate parts of an expression**\n\n- Merges ASTs with template\n- 1 argument `!!` (**unquote**, **bang-bang**)\n - Unquoting a *function call* evaluates and returns results\n - Unquoting a *function (name)* replaces the function (alternatively use `call2()`)\n- \\>1 arguments `!!!` (**unquote-splice**, **bang-bang-bang**, **triple bang**)\n- `!!` and `!!!` only work like this inside quoting function using rlang\n\n### Basic unquoting {-}\n\n**One argument**\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- expr(a + b)\ny <- expr(c / d)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nexpr(f(x, y)) # No unquoting\n#> f(x, y)\nexpr(f(!!x, !!y)) # Unquoting\n#> f(a + b, c/d)\n```\n:::\n\n\n**Multiple arguments**\n\n::: {.cell}\n\n```{.r .cell-code}\nz <- exprs(a + b, c + d)\nw <- exprs(exp1 = a + b, exp2 = c + d)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nexpr(f(z)) # No unquoting\n#> f(z)\nexpr(f(!!!z)) # Unquoting\n#> f(a + b, c + d)\nexpr(f(!!!w)) # Unquoting when named\n#> f(exp1 = a + b, exp2 = c + d)\n```\n:::\n\n\n\n### Special usages or cases {-}\n\nFor example, get the AST of an expression\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(x)\n#> x\nlobstr::ast(!!x)\n#> █─`+` \n#> ├─a \n#> └─b\n```\n:::\n\n\n\nUnquote *function call*\n\n::: {.cell}\n\n```{.r .cell-code}\nexpr(f(!!mean(c(100, 200, 300)), y))\n#> f(200, y)\n```\n:::\n\n\nUnquote *function*\n\n::: {.cell}\n\n```{.r .cell-code}\nf <- expr(sd)\nexpr((!!f)(x))\n#> sd(x)\nexpr((!!f)(!!x + !!y))\n#> sd(a + b + c/d)\n```\n:::\n\n\n## Non-quoting\n\nOnly `bquote()` provides a limited form of quasiquotation.\n\nThe rest of base selectively uses or does not use quoting (rather than unquoting). \n\nFour basic forms of quoting/non-quoting:\n\n1. **Pair of functions** - Quoting and non-quoting\n - e.g., `$` (quoting) and `[[` (non-quoting)\n2. **Pair of Arguments** - Quoting and non-quoting\n - e.g., `rm(...)` (quoting) and `rm(list = c(...))` (non-quoting)\n3. **Arg to control quoting**\n - e.g., `library(rlang)` (quoting) and `library(pkg, character.only = TRUE)` (where `pkg <- \"rlang\"`)\n4. **Quote if evaluation fails**\n - `help(var)` - Quote, show help for var\n - `help(var)` (where `var <- \"mean\"`) - No quote, show help for mean\n - `help(var)` (where `var <- 10`) - Quote fails, show help for var\n\n\n## ... (dot-dot-dot) [When using ... with quoting]\n\n- Sometimes need to supply an *arbitrary* list of expressions or arguments in a function (`...`)\n- But need a way to use these when we don't necessarily have the names\n- Remember `!!` and `!!!` only work with functions that use rlang\n- Can use `list2(...)` to turn `...` into \"tidy dots\" which *can* be unquoted and spliced\n- Require `list2()` if going to be passing or using `!!` or `!!!` in `...`\n- `list2()` is a wrapper around `dots_list()` with the most common defaults\n\n**No need for `list2()`**\n\n::: {.cell}\n\n```{.r .cell-code}\nd <- function(...) data.frame(list(...))\nd(x = c(1:3), y = c(2, 4, 6))\n#> x y\n#> 1 1 2\n#> 2 2 4\n#> 3 3 6\n```\n:::\n\n\n**Require `list2()`**\n\n::: {.cell}\n\n```{.r .cell-code}\nvars <- list(x = c(1:3), y = c(2, 4, 6))\nd(!!!vars)\n#> Error in !vars: invalid argument type\nd2 <- function(...) data.frame(list2(...))\nd2(!!!vars)\n#> x y\n#> 1 1 2\n#> 2 2 4\n#> 3 3 6\n# Same result but x and y evaluated later\nvars_expr <- exprs(x = c(1:3), y = c(2, 4, 6))\nd2(!!!vars_expr) \n#> x y\n#> 1 1 2\n#> 2 2 4\n#> 3 3 6\n```\n:::\n\n\nGetting argument names (symbols) from variables\n\n::: {.cell}\n\n```{.r .cell-code}\nnm <- \"z\"\nval <- letters[1:4]\nd2(x = 1:4, !!nm := val)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x z\n#> 1 1 a\n#> 2 2 b\n#> 3 3 c\n#> 4 4 d\n```\n\n\n:::\n:::\n\n\n## `exec()` [Making your own ...] {-}\n\nWhat if your function doesn't have tidy dots?\n\n\nCan't use `!!` or `:=` if doesn't support rlang or dynamic dots\n\n::: {.cell}\n\n```{.r .cell-code}\nmy_mean <- function(x, arg_name, arg_val) {\n mean(x, !!arg_name := arg_val)\n}\n\nmy_mean(c(NA, 1:10), arg_name = \"na.rm\", arg_val = TRUE) \n#> Error in `my_mean()`:\n#> ! `:=` can only be used within dynamic dots.\n```\n:::\n\n\nLet's use the ... from `exec()`\n\n::: {.cell}\n\n```{.r .cell-code}\nexec(.fn, ..., .env = caller_env())\n```\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmy_mean <- function(x, arg_name, arg_val) {\n exec(\"mean\", x, !!arg_name := arg_val)\n}\n\nmy_mean(c(NA, 1:10), arg_name = \"na.rm\", arg_val = TRUE) \n#> [1] 5.5\n```\n:::\n\n\nNote that you do not unquote `arg_val`.\n \nAlso `exec` is useful for mapping over a list of functions:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- c(runif(10), NA)\nfuns <- c(\"mean\", \"median\", \"sd\")\npurrr::map_dbl(funs, exec, x, na.rm = TRUE)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 0.3631060 0.2929449 0.3164028\n```\n\n\n:::\n:::\n\n\n \n## Base R `do.call` {-}\n\n`do.call(what, args)`\n\n- `what` is a function to call\n- `args` is a list of arguments to pass to the function.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnrow(mtcars)\n#> [1] 32\nmtcars3 <- do.call(\"rbind\", list(mtcars, mtcars, mtcars))\nnrow(mtcars3)\n#> [1] 96\n```\n:::\n\n \n\n### Exercise 19.5.5 #1 {-}\n\nOne way to implement `exec` is shown here: Describe how it works. What are the key ideas?\n\n\n::: {.cell}\n\n```{.r .cell-code}\nexec_ <- function(f, ..., .env = caller_env()){\n args <- list2(...)\n do.call(f, args, envir = .env)\n}\n```\n:::\n\n\n## Case Studies (side note)\n\nSometimes you want to run a bunch of models, without having to copy/paste each one.\n\nBUT, you also want the summary function to show the appropriate model call, \nnot one with hidden variables (e.g., `lm(y ~ x, data = data)`). \n\nWe can achieve this by building expressions and unquoting as needed:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(purrr)\n\nvars <- data.frame(x = c(\"hp\", \"hp\"),\n y = c(\"mpg\", \"cyl\"))\n\nx_sym <- syms(vars$x)\ny_sym <- syms(vars$y)\n\nformulae <- map2(x_sym, y_sym, \\(x, y) expr(!!y ~ !!x))\nformulae\n#> [[1]]\n#> mpg ~ hp\n#> \n#> [[2]]\n#> cyl ~ hp\nmodels <- map(formulae, \\(f) expr(lm(!!f, data = mtcars)))\nsummary(eval(models[[1]]))\n#> \n#> Call:\n#> lm(formula = mpg ~ hp, data = mtcars)\n#> \n#> Residuals:\n#> Min 1Q Median 3Q Max \n#> -5.7121 -2.1122 -0.8854 1.5819 8.2360 \n#> \n#> Coefficients:\n#> Estimate Std. Error t value Pr(>|t|) \n#> (Intercept) 30.09886 1.63392 18.421 < 2e-16 ***\n#> hp -0.06823 0.01012 -6.742 1.79e-07 ***\n#> ---\n#> Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1\n#> \n#> Residual standard error: 3.863 on 30 degrees of freedom\n#> Multiple R-squared: 0.6024,\tAdjusted R-squared: 0.5892 \n#> F-statistic: 45.46 on 1 and 30 DF, p-value: 1.788e-07\n```\n:::\n\n\nAs a function:\n\n::: {.cell}\n\n```{.r .cell-code}\nlm_df <- function(df, data) {\n x_sym <- map(df$x, as.symbol)\n y_sym <- map(df$y, as.symbol)\n data <- enexpr(data)\n \n formulae <- map2(x_sym, y_sym, \\(x, y) expr(!!y ~ !!x))\n models <- map(formulae, \\(f) expr(lm(!!f, !!data)))\n \n map(models, \\(m) summary(eval(m)))\n}\n\nvars <- data.frame(x = c(\"hp\", \"hp\"),\n y = c(\"mpg\", \"cyl\"))\nlm_df(vars, data = mtcars)\n#> [[1]]\n#> \n#> Call:\n#> lm(formula = mpg ~ hp, data = mtcars)\n#> \n#> Residuals:\n#> Min 1Q Median 3Q Max \n#> -5.7121 -2.1122 -0.8854 1.5819 8.2360 \n#> \n#> Coefficients:\n#> Estimate Std. Error t value Pr(>|t|) \n#> (Intercept) 30.09886 1.63392 18.421 < 2e-16 ***\n#> hp -0.06823 0.01012 -6.742 1.79e-07 ***\n#> ---\n#> Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1\n#> \n#> Residual standard error: 3.863 on 30 degrees of freedom\n#> Multiple R-squared: 0.6024,\tAdjusted R-squared: 0.5892 \n#> F-statistic: 45.46 on 1 and 30 DF, p-value: 1.788e-07\n#> \n#> \n#> [[2]]\n#> \n#> Call:\n#> lm(formula = cyl ~ hp, data = mtcars)\n#> \n#> Residuals:\n#> Min 1Q Median 3Q Max \n#> -2.27078 -0.74879 -0.06417 0.63512 1.74067 \n#> \n#> Coefficients:\n#> Estimate Std. Error t value Pr(>|t|) \n#> (Intercept) 3.006795 0.425485 7.067 7.41e-08 ***\n#> hp 0.021684 0.002635 8.229 3.48e-09 ***\n#> ---\n#> Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1\n#> \n#> Residual standard error: 1.006 on 30 degrees of freedom\n#> Multiple R-squared: 0.693,\tAdjusted R-squared: 0.6827 \n#> F-statistic: 67.71 on 1 and 30 DF, p-value: 3.478e-09\n```\n:::\n\n\n\n\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/tbByqsRRvdE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/IXE21pR8EJ0\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/gxSpz6IePLg\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/aniKrZrr4aU\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/klcpEb5ZBSM\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/OBodjc80y-E\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n01:02:07\tTrevin:\tYeah, that was a great workshop\n01:02:18\tTrevin:\tGlad they posted the resources online\n01:06:39\tTrevin:\tThank you!\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/8LPw_VTBsmQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary>Meeting chat log</summary>\n```\n00:50:48\tStone:\thttps://www.r-bloggers.com/2018/10/quasiquotation-in-r-via-bquote/\n00:58:26\tiPhone:\tSee ya next week!\n```\n</details>\n\n<iframe src=\"https://www.youtube.com/embed/g77Jfl_xrXM\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary>Meeting chat log</summary>\n```\n00:55:22\tcollinberke:\thttps://rlang.r-lib.org/reference/embrace-operator.html?q=enquo#under-the-hood\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Evaluation\n---\n\n## Learning objectives:\n\n- Learn evaluation basics\n- Learn about **quosures** and **data mask**\n- Understand tidy evaluation\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(rlang)\nlibrary(purrr)\n```\n:::\n\n\n## A bit of a recap\n\n- Metaprogramming: To separate our description of the action from the action itself - Separate the code from its evaluation.\n- Quasiquotation: combine code written by the *function's author* with code written by the *function's user*.\n - Unquotation: it gives the *user* the ability to evaluate parts of a quoted argument.\n - Evaluation: it gives the *developer* the ability to evluated quoted expression in custom environments.\n\n**Tidy evaluation**: quasiquotation, quosures and data masks\n\n## Evaluation basics \n\nWe use `eval()` to evaluate, run, or execute expressions. It requires two arguments: \n\n- `expr`: the object to evaluate, either an expression or a symbol.\n- `env`: the environment in which to evaluate the expression or where to look for the values. \nDefaults to current env.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsumexpr <- expr(x + y)\nx <- 10\ny <- 40\neval(sumexpr)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 50\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\neval(sumexpr, envir = env(x = 1000, y = 10))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1010\n```\n\n\n:::\n:::\n\n\n\n## Application: reimplementing `source()`\n\nWhat do we need?\n\n- Read the file being sourced. \n- Parse its expressions (quote them?)\n- Evaluate each expression saving the results \n- Return the results\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsource2 <- function(path, env = caller_env()) {\n file <- paste(readLines(path, warn = FALSE), collapse = \"\\n\")\n exprs <- parse_exprs(file)\n\n res <- NULL\n for (i in seq_along(exprs)) {\n res <- eval(exprs[[i]], env)\n }\n\n invisible(res)\n}\n```\n:::\n\n\nThe real source is much more complex.\n\n## Quosures\n\n**quosures** are a data structure from `rlang` containing both and expression and an environment\n\n*Quoting* + *closure* because it quotes the expression and encloses the environment.\n\nThree ways to create them:\n\n- Used mostly for learning: `new_quosure()`, creates a quosure from its components.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nq1 <- rlang::new_quosure(expr(x + y), \n env(x = 1, y = 10))\n```\n:::\n\n\nWith a quosure, we can use `eval_tidy()` directly. \n\n\n::: {.cell}\n\n```{.r .cell-code}\nrlang::eval_tidy(q1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 11\n```\n\n\n:::\n:::\n\n\nAnd get its components\n\n\n::: {.cell}\n\n```{.r .cell-code}\nrlang::get_expr(q1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> x + y\n```\n\n\n:::\n\n```{.r .cell-code}\nrlang::get_env(q1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: 0x00000226d60330a8>\n```\n\n\n:::\n:::\n\n\nOr set them\n\n\n::: {.cell}\n\n```{.r .cell-code}\nq1 <- set_env(q1, env(x = 3, y = 4))\neval_tidy(q1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 7\n```\n\n\n:::\n:::\n\n\n\n- Used in the real world: `enquo()` o `enquos()`, to capture user supplied expressions. They take the environment from where they're created. \n\n\n::: {.cell}\n\n```{.r .cell-code}\nfoo <- function(x) enquo(x)\nquo_foo <- foo(a + b)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nget_expr(quo_foo)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a + b\n```\n\n\n:::\n\n```{.r .cell-code}\nget_env(quo_foo)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: R_GlobalEnv>\n```\n\n\n:::\n:::\n\n\n- Almost never used: `quo()` and `quos()`, to match to `expr()` and `exprs()`.\n\n## Quosures and `...`\n\nQuosures are just a convenience, but they are essential when it comes to working with `...`, because you can have each argument from `...` associated with a different environment. \n\n\n::: {.cell}\n\n```{.r .cell-code}\ng <- function(...) {\n ## Creating our quosures from ...\n enquos(...)\n}\n\ncreateQuos <- function(...) {\n ## symbol from the function environment\n x <- 1\n g(..., f = x)\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\n## symbol from the global environment\nx <- 0\nqs <- createQuos(global = x)\nqs\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <list_of<quosure>>\n#> \n#> $global\n#> <quosure>\n#> expr: ^x\n#> env: global\n#> \n#> $f\n#> <quosure>\n#> expr: ^x\n#> env: 0x00000226d3a61a88\n```\n\n\n:::\n:::\n\n\n## Other facts about quosures\n\nFormulas were the inspiration for closures because they also capture an expression and an environment\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf <- ~runif(3)\nstr(f)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> Class 'formula' language ~runif(3)\n#> ..- attr(*, \".Environment\")=<environment: R_GlobalEnv>\n```\n\n\n:::\n:::\n\n\nThere was an early version of tidy evaluation with formulas, but there's no easy way to implement quasiquotation with them. \n\nThey are actually call objects \n\n\n::: {.cell}\n\n```{.r .cell-code}\nq4 <- new_quosure(expr(x + y + z))\nclass(q4)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"quosure\" \"formula\"\n```\n\n\n:::\n\n```{.r .cell-code}\nis.call(q4)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\nwith an attribute to store the environment\n\n\n::: {.cell}\n\n```{.r .cell-code}\nattr(q4, \".Environment\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <environment: R_GlobalEnv>\n```\n\n\n:::\n:::\n\n\n\n**Nested quosures**\n\nWith quosiquotation we can embed quosures in expressions. \n\n\n::: {.cell}\n\n```{.r .cell-code}\nq2 <- new_quosure(expr(x), env(x = 1))\nq3 <- new_quosure(expr(x), env(x = 100))\n\nnq <- expr(!!q2 + !!q3)\n```\n:::\n\n\nAnd evaluate them \n\n\n::: {.cell}\n\n```{.r .cell-code}\neval_tidy(nq)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 101\n```\n\n\n:::\n:::\n\n\nBut for printing it's better to use `expr_print(x)` \n\n\n::: {.cell}\n\n```{.r .cell-code}\nexpr_print(nq)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> (^x) + (^x)\n```\n\n\n:::\n\n```{.r .cell-code}\nnq\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> (~x) + ~x\n```\n\n\n:::\n:::\n\n\n## Data mask\n\nA data frame where the evaluated code will look first for its variable definitions. \n\nUsed in packages like dplyr and ggplot. \n\nTo use it we need to supply the data mask as a second argument to `eval_tidy()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nq1 <- new_quosure(expr(x * y), env(x = 100))\ndf <- data.frame(y = 1:10)\n\neval_tidy(q1, df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 100 200 300 400 500 600 700 800 900 1000\n```\n\n\n:::\n:::\n\n\nEverything together, in one function. \n\n\n::: {.cell}\n\n```{.r .cell-code}\nwith2 <- function(data, expr) {\n expr <- enquo(expr)\n eval_tidy(expr, data)\n}\n```\n:::\n\n\nBut we need to create the objects that are not part of our data mask\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- 100\nwith2(df, x * y)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 100 200 300 400 500 600 700 800 900 1000\n```\n\n\n:::\n:::\n\n\nAlso doable with `base::eval()` instead of `rlang::eval_tidy()` but we have to use `base::substitute()` instead of `enquo()` (like we did for `enexpr()`) and we need to specify the environment.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nwith3 <- function(data, expr) {\n expr <- substitute(expr)\n eval(expr, data, caller_env())\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nwith3(df, x*y)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 100 200 300 400 500 600 700 800 900 1000\n```\n\n\n:::\n:::\n\n\n## Pronouns: .data$ and .env$\n\n**Ambiguity!!**\n\nAn object value can come from the env or from the data mask\n\n\n::: {.cell}\n\n```{.r .cell-code}\nq1 <- new_quosure(expr(x * y + x), env = env(x = 1))\ndf <- data.frame(y = 1:5, \n x = 10)\n\neval_tidy(q1, df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 20 30 40 50 60\n```\n\n\n:::\n:::\n\n\nWe use pronouns: \n\n- `.data$x`: `x` from the data mask\n- `.env$x`: `x` from the environment\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nq1 <- new_quosure(expr(.data$x * y + .env$x), env = env(x = 1))\neval_tidy(q1, df)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 11 21 31 41 51\n```\n\n\n:::\n:::\n\n\n## Application: reimplementing `base::subset()`\n\n`base::subset()` works like `dplyr::filter()`: it selects rows of a data frame given an expression. \n\nWhat do we need?\n\n- Quote the expression to filter\n- Figure out which rows in the data frame pass the filter\n- Subset the data frame\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsubset2 <- function(data, rows) {\n rows <- enquo(rows)\n rows_val <- eval_tidy(rows, data)\n stopifnot(is.logical(rows_val))\n\n data[rows_val, , drop = FALSE]\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsample_df <- data.frame(a = 1:5, b = 5:1, c = c(5, 3, 2, 4, 1))\n\n# Shorthand for sample_df[sample_df$b == sample_df$c, ]\nsubset2(sample_df, b == c)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a b c\n#> 1 1 5 5\n#> 5 5 1 1\n```\n\n\n:::\n:::\n\n\n## Using tidy evaluation\n\nMost of the time we might not call it directly, but call a function that uses `eval_tidy()` (becoming developer AND user)\n\n**Use case**: resample and subset\n\nWe have a function that resamples a dataset: \n\n\n::: {.cell}\n\n```{.r .cell-code}\nresample <- function(df, n) {\n idx <- sample(nrow(df), n, replace = TRUE)\n df[idx, , drop = FALSE]\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nresample(sample_df, 10)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a b c\n#> 2 2 4 3\n#> 4 4 2 4\n#> 1 1 5 5\n#> 4.1 4 2 4\n#> 2.1 2 4 3\n#> 4.2 4 2 4\n#> 5 5 1 1\n#> 5.1 5 1 1\n#> 4.3 4 2 4\n#> 4.4 4 2 4\n```\n\n\n:::\n:::\n\n\nBut we also want to use subset and we want to create a function that allow us to resample and subset (with `subset2()`) in a single step. \n\nFirst attempt: \n\n\n::: {.cell}\n\n```{.r .cell-code}\nsubsample <- function(df, cond, n = nrow(df)) {\n df <- subset2(df, cond)\n resample(df, n)\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsubsample(sample_df, b == c, 10)\n```\n\n::: {.cell-output .cell-output-error}\n\n```\n#> Error: object 'b' not found\n```\n\n\n:::\n:::\n\n\nWhat happened? \n\n`subsample()` doesn't quote any arguments and `cond` is evaluated normally\n\nSo we have to quote `cond` and unquote it when we pass it to `subset2()`\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsubsample <- function(df, cond, n = nrow(df)) {\n cond <- enquo(cond)\n\n df <- subset2(df, !!cond)\n resample(df, n)\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsubsample(sample_df, b == c, 10)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> a b c\n#> 1 1 5 5\n#> 1.1 1 5 5\n#> 5 5 1 1\n#> 1.2 1 5 5\n#> 5.1 5 1 1\n#> 5.2 5 1 1\n#> 5.3 5 1 1\n#> 1.3 1 5 5\n#> 5.4 5 1 1\n#> 5.5 5 1 1\n```\n\n\n:::\n:::\n\n\n**Be careful!**, potential ambiguity:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nthreshold_x <- function(df, val) {\n subset2(df, x >= val)\n}\n```\n:::\n\n\nWhat would happen if `x` exists in the calling environment but doesn't exist in `df`? Or if `val` also exists in `df`?\n\nSo, as developers of `threshold_x()` and users of `subset2()`, we have to add some pronouns:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nthreshold_x <- function(df, val) {\n subset2(df, .data$x >= .env$val)\n}\n```\n:::\n\n\n\nJust remember: \n\n> As a general rule of thumb, as a function author it’s your responsibility \n> to avoid ambiguity with any expressions that you create; \n> it’s the user’s responsibility to avoid ambiguity in expressions that they create.\n\n\n## Base evaluation\n\nCheck 20.6 in the book!\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/4En_Ypvtjqw\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/ewHAlVwCGtY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/0K1vyiV8_qo\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/kfwjJDuyN8U\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/WzfD9GK6nCI\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/8FT2BA18Ghg\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n01:00:42\tTrevin:\tThey just want to help you present that’s all\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/g77Jfl_xrXM\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary>Meeting chat log</summary>\n```\n00:55:22\tcollinberke:\thttps://rlang.r-lib.org/reference/embrace-operator.html?q=enquo#under-the-hood\n```\n</details>\n\n<iframe src=\"https://www.youtube.com/embed/wPLrafScijE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n",
+ "supporting": [],
+ "filters": [
+ "rmarkdown/pagebreak.lua"
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diff --git a/_freeze/slides/21/execute-results/html.json b/_freeze/slides/21/execute-results/html.json
@@ -0,0 +1,19 @@
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+ "hash": "067e821481bf80586dcb97aa1113e54f",
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+ "markdown": "---\nengine: knitr\ntitle: Translating R code\n---\n\n## Learning objectives:\n\n- Build DSL (domain specific languages) to aid interoperability between R, HTML and LaTeX\n- Reinforce metaprogramming concepts (expressions, quasiquotation, evaluation)\n\n\n::: {.cell}\n::: {.cell-output-display}\n\n```{=html}\n<div class=\"DiagrammeR html-widget html-fill-item\" id=\"htmlwidget-ef79d3ab7e051da14c53\" style=\"width:100%;height:464px;\"></div>\n<script type=\"application/json\" data-for=\"htmlwidget-ef79d3ab7e051da14c53\">{\"x\":{\"diagram\":\"\\ngraph LR\\n\\nexpressions --> R\\nquasiquotation --> R\\nevaluation --> R\\n\\nR --> HTML\\nR --> LaTeX\\n\"},\"evals\":[],\"jsHooks\":[]}</script>\n```\n\n:::\n:::\n\n\n<details>\n<summary>Mermaid code</summary>\n\n::: {.cell}\n\n```{.r .cell-code}\nDiagrammeR::mermaid(\"\ngraph LR\n\nexpressions --> R\nquasiquotation --> R\nevaluation --> R\n\nR --> HTML\nR --> LaTeX\n\")\n```\n:::\n\n\n</details>\n\n<details>\n<summary>Session Info</summary>\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(DiagrammeR) #for Mermaid flowchart\nlibrary(lobstr) #abstract syntax trees\nlibrary(purrr) #functional programming\nlibrary(rlang) #tidy evaluation\n\n# from section 18.5\nexpr_type <- function(x) {\n if (rlang::is_syntactic_literal(x)) {\n \"constant\"\n } else if (is.symbol(x)) {\n \"symbol\"\n } else if (is.call(x)) {\n \"call\"\n } else if (is.pairlist(x)) {\n \"pairlist\"\n } else {\n typeof(x)\n }\n}\nflat_map_chr <- function(.x, .f, ...) {\n purrr::flatten_chr(purrr::map(.x, .f, ...))\n}\nswitch_expr <- function(x, ...) {\n switch(expr_type(x),\n ...,\n stop(\"Don't know how to handle type \", typeof(x), call. = FALSE)\n )\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nutils::sessionInfo()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> R version 4.5.1 (2025-06-13 ucrt)\n#> Platform: x86_64-w64-mingw32/x64\n#> Running under: Windows 11 x64 (build 26100)\n#> \n#> Matrix products: default\n#> LAPACK version 3.12.1\n#> \n#> locale:\n#> [1] LC_COLLATE=English_United States.utf8 \n#> [2] LC_CTYPE=English_United States.utf8 \n#> [3] LC_MONETARY=English_United States.utf8\n#> [4] LC_NUMERIC=C \n#> [5] LC_TIME=English_United States.utf8 \n#> \n#> time zone: America/Chicago\n#> tzcode source: internal\n#> \n#> attached base packages:\n#> [1] stats graphics grDevices utils datasets methods base \n#> \n#> other attached packages:\n#> [1] rlang_1.1.6 purrr_1.1.0 lobstr_1.1.2 DiagrammeR_1.0.11\n#> \n#> loaded via a namespace (and not attached):\n#> [1] digest_0.6.37 RColorBrewer_1.1-3 R6_2.6.1 fastmap_1.2.0 \n#> [5] xfun_0.52 magrittr_2.0.3 glue_1.8.0 knitr_1.50 \n#> [9] htmltools_0.5.8.1 rmarkdown_2.29 lifecycle_1.0.4 cli_3.6.5 \n#> [13] visNetwork_2.1.2 vctrs_0.6.5 compiler_4.5.1 tools_4.5.1 \n#> [17] evaluate_1.0.4 yaml_2.3.10 jsonlite_2.0.0 htmlwidgets_1.6.4 \n#> [21] keyring_1.4.1\n```\n\n\n:::\n:::\n\n\n</details>\n\n## Case Study: MCQ\n\nWe are going to use R code to generate HTML or LaTeX to produce multiple-choice questions such as\n\n### Pop Quiz!\n\n1. What is the **derivative** of $f(x) = 1 + 2\\cos(3\\pi x + 4)$?\n\n a. $f'(x) = 6\\pi\\sin(3\\pi x + 4)$\n b. $f'(x) = -6\\pi\\sin(3\\pi x + 4)$\n c. $f'(x) = 24\\pi\\sin(3\\pi x + 4)$\n d. $f'(x) = -24\\pi\\sin(3\\pi x + 4)$\n\n\n\n\n\n---\n\nAs developers, we may be asking ourselves:\n\n* What are the expressions?\n* What are the symbols?\n* Will we have to quote inputs from the user (math teacher)?\n\n\n## HTML\n\nWe are trying to produce\n\n```{}\n<body>\n <h1 id = 'pop_quiz'>Pop Quiz</h1>\n <ol>\n <li>What is the <b>derivative</b> of $f(x) = 1 + 2\\cos(3\\pi x + 4)$?</li>\n <ol>\n <li>$f'(x) = 6\\pi\\sin(3\\pi x + 4)$</li>\n <li>$f'(x) = -6\\pi\\sin(3\\pi x + 4)$</li>\n <li>$f'(x) = 24\\pi\\sin(3\\pi x + 4)$</li>\n <li>$f'(x) = -24\\pi\\sin(3\\pi x + 4)$</li>\n </ol>\n </ol>\n <img src = 'calculus_cat.png' width = '100' height = '100' />\n</body>\n```\n\nusing DSL\n\n\n::: {.cell}\n\n```{.r .cell-code}\nwith_html(\n body(\n h1(\"Pop quiz!\", id = \"pop_quiz\"),\n ol(\n li(\"What is the \", b(\"derivative\"), \"of $f(x) = 1 + 2cos(3pi x + 4)$?\"),\n ol(\n li(\"$f'(x) = 6pi*sin(3pi x + 4)$\"),\n li(\"$f'(x) = -6pi*sin(3pi x + 4)$\"),\n li(\"$f'(x) = 24pi*sin(3pi x + 4)$\"),\n li(\"$f'(x) = -24pi*sin(3pi x + 4)$\")\n )\n ),\n img(src = \"images/translating/calculus_cat.png\", width = 100, height = 100)\n )\n)\n```\n:::\n\n\nIn particular,\n\n* **tags** such as `<b></b>` have *attributes*\n* **void tags** such as `<img />`\n* special characters: `&`, `<`, and `>`\n\n\n<details>\n<summary>HTML verification</summary>\n\n```{=html}\n<body>\n <h1 id = 'pop_quiz'>Pop Quiz</h1>\n <ol>\n <li>What is the <b>derivative</b> of $f(x) = 1 + 2\\cos(3\\pi x + 4)$?</li>\n <ol>\n <li>$f'(x) = 6\\pi\\sin(3\\pi x + 4)$</li>\n <li>$f'(x) = -6\\pi\\sin(3\\pi x + 4)$</li>\n <li>$f'(x) = 24\\pi\\sin(3\\pi x + 4)$</li>\n <li>$f'(x) = -24\\pi\\sin(3\\pi x + 4)$</li>\n </ol>\n </ol>\n <img src = 'images/translating/calculus_cat.png' width = '100' height = '100' />\n</body>\n```\n\n</details>\n\n\n## Escaping\n\n* need to escape `&`, `<`, and `>`\n* don't \"double escape\"\n* leave HTML alone\n\n### S3 Class\n\n\n::: {.cell}\n\n```{.r .cell-code}\nhtml <- function(x) structure(x, class = \"advr_html\")\n\n#dispatch\nprint.advr_html <- function(x, ...) {\n out <- paste0(\"<HTML> \", x)\n cat(paste(strwrap(out), collapse = \"\\n\"), \"\\n\", sep = \"\")\n}\n```\n:::\n\n\n### Generic\n\n\n::: {.cell}\n\n```{.r .cell-code}\nescape <- function(x) UseMethod(\"escape\")\nescape.character <- function(x) {\n x <- gsub(\"&\", \"&\", x)\n x <- gsub(\"<\", \"<\", x)\n x <- gsub(\">\", \">\", x)\n html(x)\n}\nescape.advr_html <- function(x) x\n```\n:::\n\n\n### Checks\n\n\n::: {.cell}\n\n```{.r .cell-code}\nescape(\"This is some text.\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <HTML> This is some text.\n```\n\n\n:::\n\n```{.r .cell-code}\nescape(\"x > 1 & y < 2\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <HTML> x > 1 & y < 2\n```\n\n\n:::\n\n```{.r .cell-code}\nescape(escape(\"This is some text. 1 > 2\")) #double escape\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <HTML> This is some text. 1 > 2\n```\n\n\n:::\n\n```{.r .cell-code}\nescape(html(\"<hr />\")) #already html\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <HTML> <hr />\n```\n\n\n:::\n:::\n\n\n\n## Named Components\n\n```{}\nli(\"What is the \", b(\"derivative\"), \"of $f(x) = 1 + 2\\cos(3\\pi x + 4)$?\")\n```\n\n* aiming to classify `li` and `b` as **named components**\n\n\n::: {.cell}\n\n```{.r .cell-code}\ndots_partition <- function(...) {\n dots <- list2(...)\n \n if (is.null(names(dots))) {\n is_named <- rep(FALSE, length(dots))\n} else {\n is_named <- names(dots) != \"\"\n}\n \n list(\n named = dots[is_named],\n unnamed = dots[!is_named]\n )\n}\n```\n:::\n\n\n### Check\n\n\n::: {.cell}\n\n```{.r .cell-code}\nstr(dots_partition(company = \"Posit\",\n software = \"RStudio\",\n \"DSLC\",\n \"Cohort 9\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> List of 2\n#> $ named :List of 2\n#> ..$ company : chr \"Posit\"\n#> ..$ software: chr \"RStudio\"\n#> $ unnamed:List of 2\n#> ..$ : chr \"DSLC\"\n#> ..$ : chr \"Cohort 9\"\n```\n\n\n:::\n:::\n\n\n<details>\n<summary>HTML Attributes</summary>\n\nFound among the textbook's [source code](https://github.com/hadley/adv-r/blob/master/dsl-html-attributes.r)\n\n\n::: {.cell}\n\n```{.r .cell-code}\nhtml_attributes <- function(list) {\n if (length(list) == 0) return(\"\")\n\n attr <- map2_chr(names(list), list, html_attribute)\n paste0(\" \", unlist(attr), collapse = \"\")\n}\nhtml_attribute <- function(name, value = NULL) {\n if (length(value) == 0) return(name) # for attributes with no value\n if (length(value) != 1) stop(\"`value` must be NULL or length 1\")\n\n if (is.logical(value)) {\n # Convert T and F to true and false\n value <- tolower(value)\n } else {\n value <- escape_attr(value)\n }\n paste0(name, \"='\", value, \"'\")\n}\nescape_attr <- function(x) {\n x <- escape.character(x)\n x <- gsub(\"\\'\", ''', x)\n x <- gsub(\"\\\"\", '"', x)\n x <- gsub(\"\\r\", ' ', x)\n x <- gsub(\"\\n\", ' ', x)\n x\n}\n```\n:::\n\n\n\n</details>\n\n\n## Tags (calls)\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntag <- function(tag) {\n new_function(\n exprs(... = ), #arguments of new function\n expr({ #body of the new function\n \n #classify tags as named components\n dots <- dots_partition(...)\n \n #focus on named components as the tags\n attribs <- html_attributes(dots$named)\n \n # otherwise, nested code\n children <- map_chr(dots$unnamed, escape)\n\n # paste brackets, tag names, and attributes together\n # then unquote user arguments\n html(paste0(\n !!paste0(\"<\", tag), attribs, \">\",\n paste(children, collapse = \"\"),\n !!paste0(\"</\", tag, \">\")\n ))\n }),\n caller_env() #return the environment\n )\n}\n```\n:::\n\n\n<details>\n<summary>Void tags</summary>\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvoid_tag <- function(tag) {\n new_function(\n exprs(... = ), #allows for missing arguments\n expr({\n dots <- dots_partition(...)\n \n # error check\n if (length(dots$unnamed) > 0) {\n abort(!!paste0(\"<\", tag, \"> must not have unnamed arguments\"))\n }\n attribs <- html_attributes(dots$named)\n\n html(paste0(!!paste0(\"<\", tag), attribs, \" />\"))\n }),\n caller_env()\n )\n}\n```\n:::\n\n\n</details>\n\n### Checks\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntag(\"ol\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (...) \n#> {\n#> dots <- dots_partition(...)\n#> attribs <- html_attributes(dots$named)\n#> children <- map_chr(dots$unnamed, escape)\n#> html(paste0(\"<ol\", attribs, \">\", paste(children, collapse = \"\"), \n#> \"</ol>\"))\n#> }\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nimg <- void_tag(\"img\")\n```\n:::\n\n\n\n```{.r .cell-code}\nimg()\n```\n\n<HTML> <img />\n\n\n::: {.cell}\n\n```{.r .cell-code}\nimg(src = \"images/translating/calculus_cat.png\",\n width = 100,\n height = 100)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <HTML> <img src='images/translating/calculus_cat.png' width='100'\n#> height='100' />\n```\n\n\n:::\n:::\n\n\n\n## Tags (processing)\n\n<details>\n<summary>Venn Diagram</summary>\n\n\n::: {.cell}\n\n```{.r .cell-code}\ntags <- c(\"a\", \"abbr\", \"address\", \"article\", \"aside\", \"audio\",\n \"b\",\"bdi\", \"bdo\", \"blockquote\", \"body\", \"button\", \"canvas\",\n \"caption\",\"cite\", \"code\", \"colgroup\", \"data\", \"datalist\",\n \"dd\", \"del\",\"details\", \"dfn\", \"div\", \"dl\", \"dt\", \"em\",\n \"eventsource\",\"fieldset\", \"figcaption\", \"figure\", \"footer\",\n \"form\", \"h1\", \"h2\", \"h3\", \"h4\", \"h5\", \"h6\", \"head\", \"header\",\n \"hgroup\", \"html\", \"i\",\"iframe\", \"ins\", \"kbd\", \"label\",\n \"legend\", \"li\", \"mark\", \"map\",\"menu\", \"meter\", \"nav\",\n \"noscript\", \"object\", \"ol\", \"optgroup\", \"option\", \"output\",\n \"p\", \"pre\", \"progress\", \"q\", \"ruby\", \"rp\",\"rt\", \"s\", \"samp\",\n \"script\", \"section\", \"select\", \"small\", \"span\", \"strong\",\n \"style\", \"sub\", \"summary\", \"sup\", \"table\", \"tbody\", \"td\",\n \"textarea\", \"tfoot\", \"th\", \"thead\", \"time\", \"title\", \"tr\",\n \"u\", \"ul\", \"var\", \"video\"\n)\n\nvoid_tags <- c(\"area\", \"base\", \"br\", \"col\", \"command\", \"embed\",\n \"hr\", \"img\", \"input\", \"keygen\", \"link\", \"meta\", \"param\",\n \"source\", \"track\", \"wbr\"\n)\n```\n:::\n\n\n</details>\n\n\n::: {.cell}\n\n```{.r .cell-code}\nhtml_tags <- c(\n tags |> #list of tag names from HTML\n set_names() |> #named variable to avoid reserved words!\n map(tag), #make them function calls\n void_tags |>\n set_names() |>\n map(void_tag)\n)\n```\n:::\n\n\n\n### Example\n\n\n::: {.cell}\n\n```{.r .cell-code}\nhtml_tags$ol(\n html_tags$li(\"What is the \", \n html_tags$b(\"derivative\"),\n \"of $f(x) = 1 + 2cos(3pi x + 4)$?\"))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <HTML> <ol><li>What is the <b>derivative</b>of $f(x) = 1 + 2cos(3pi x +\n#> 4)$?</li></ol>\n```\n\n\n:::\n:::\n\n\n\n## Bringing the HTML Together\n\n\n::: {.cell}\n\n```{.r .cell-code}\nwith_html <- function(code) {\n eval_tidy(enquo(code), html_tags)\n}\n```\n:::\n\n\n### Main Example\n\n\n::: {.cell}\n\n```{.r .cell-code}\nwith_html(\n body(\n h1(\"Pop quiz!\", id = \"pop_quiz\"),\n ol(\n li(\"What is the \", b(\"derivative\"), \"of $f(x) = 1 + 2cos(3pi x + 4)$?\"),\n ol(\n li(\"$f'(x) = 6pi*sin(3pi x + 4)$\"),\n li(\"$f'(x) = -6pi*sin(3pi x + 4)$\"),\n li(\"$f'(x) = 24pi*sin(3pi x + 4)$\"),\n li(\"$f'(x) = -24pi*sin(3pi x + 4)$\")\n )\n ),\n img(src = \"images/translating/calculus_cat.png\", width = 100, height = 100)\n )\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <HTML> <body><h1 id='pop_quiz'>Pop quiz!</h1><ol><li>What is the\n#> <b>derivative</b>of $f(x) = 1 + 2cos(3pi x + 4)$?</li><ol><li>$f'(x) =\n#> 6pi*sin(3pi x + 4)$</li><li>$f'(x) = -6pi*sin(3pi x +\n#> 4)$</li><li>$f'(x) = 24pi*sin(3pi x + 4)$</li><li>$f'(x) =\n#> -24pi*sin(3pi x + 4)$</li></ol></ol><img\n#> src='images/translating/calculus_cat.png' width='100' height='100'\n#> /></body>\n```\n\n\n:::\n:::\n\n\n### Check\n\n```{=html}\n<h1 id='pop_quiz'>Pop quiz!</h1><ol><li>What is the <b>derivative</b> of $f(x) = 1 + 2cos(3pi x + 4)$?</li><ol><li>$f'(x) = 6pi*sin(3pi x + 4)$</li><li>$f'(x) = -6pi*sin(3pi x + 4)$</li><li>$f'(x) = 24pi*sin(3pi x + 4)$</li><li>$f'(x) = -24pi*sin(3pi x + 4)$</li></ol></ol><img src='images/translating/calculus_cat.png' width='100' height='100' />\n```\n\n\n## LaTeX\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlatex <- function(x) structure(x, class = \"advr_latex\")\nprint.advr_latex <- function(x) { cat(\"<LATEX> \", x, \"\\n\", sep = \"\") }\n```\n:::\n\n\n### to_math\n\n\n::: {.cell}\n\n```{.r .cell-code}\nto_math <- function(x) {\n expr <- enexpr(x)\n latex( #return LaTeX code\n eval_bare( #eval_bare to ensure use of latex environment \n expr, #expression (not quosure)\n latex_env(expr) #need to define latex_env\n ))\n}\n```\n:::\n\n\n## Known Symbols\n\n\n::: {.cell}\n\n```{.r .cell-code}\ngreek_letters <- c(\n \"alpha\", \"beta\", \"chi\", \"delta\", \"Delta\", \"epsilon\", \"eta\", \n\"gamma\", \"Gamma\", \"iota\", \"kappa\", \"lambda\", \"Lambda\", \"mu\", \n\"nu\", \"omega\", \"Omega\", \"phi\", \"Phi\", \"pi\", \"Pi\", \"psi\", \"Psi\", \n\"rho\", \"sigma\", \"Sigma\", \"tau\", \"theta\", \"Theta\", \"upsilon\", \n\"Upsilon\", \"varepsilon\", \"varphi\", \"varrho\", \"vartheta\", \"xi\", \n\"Xi\", \"zeta\"\n)\n\ngreek_env <- rlang::as_environment(\n rlang::set_names(\n paste0(\"\\\\\", greek_letters), #latex values\n greek_letters #R names\n )\n)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nstr(as.list(greek_env))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> List of 38\n#> $ zeta : chr \"\\\\zeta\"\n#> $ Xi : chr \"\\\\Xi\"\n#> $ xi : chr \"\\\\xi\"\n#> $ vartheta : chr \"\\\\vartheta\"\n#> $ varrho : chr \"\\\\varrho\"\n#> $ varphi : chr \"\\\\varphi\"\n#> $ varepsilon: chr \"\\\\varepsilon\"\n#> $ Upsilon : chr \"\\\\Upsilon\"\n#> $ upsilon : chr \"\\\\upsilon\"\n#> $ Theta : chr \"\\\\Theta\"\n#> $ theta : chr \"\\\\theta\"\n#> $ tau : chr \"\\\\tau\"\n#> $ Sigma : chr \"\\\\Sigma\"\n#> $ sigma : chr \"\\\\sigma\"\n#> $ rho : chr \"\\\\rho\"\n#> $ Psi : chr \"\\\\Psi\"\n#> $ psi : chr \"\\\\psi\"\n#> $ Pi : chr \"\\\\Pi\"\n#> $ pi : chr \"\\\\pi\"\n#> $ Phi : chr \"\\\\Phi\"\n#> $ phi : chr \"\\\\phi\"\n#> $ Omega : chr \"\\\\Omega\"\n#> $ omega : chr \"\\\\omega\"\n#> $ nu : chr \"\\\\nu\"\n#> $ mu : chr \"\\\\mu\"\n#> $ Lambda : chr \"\\\\Lambda\"\n#> $ lambda : chr \"\\\\lambda\"\n#> $ kappa : chr \"\\\\kappa\"\n#> $ iota : chr \"\\\\iota\"\n#> $ Gamma : chr \"\\\\Gamma\"\n#> $ gamma : chr \"\\\\gamma\"\n#> $ eta : chr \"\\\\eta\"\n#> $ epsilon : chr \"\\\\epsilon\"\n#> $ Delta : chr \"\\\\Delta\"\n#> $ delta : chr \"\\\\delta\"\n#> $ chi : chr \"\\\\chi\"\n#> $ beta : chr \"\\\\beta\"\n#> $ alpha : chr \"\\\\alpha\"\n```\n\n\n:::\n:::\n\n\n\n## Known Functions\n\n### Unary Operations\n\n\n::: {.cell}\n\n```{.r .cell-code}\nunary_op <- function(left, right) {\n new_function(\n exprs(e1 = ),\n expr(\n paste0(!!left, e1, !!right)\n ),\n caller_env()\n )\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\n#example\nunary_op(\"\\\\sqrt{\", \"}\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (e1) \n#> paste0(\"\\\\sqrt{\", e1, \"}\")\n```\n\n\n:::\n:::\n\n\n### Binary Operations\n\n\n::: {.cell}\n\n```{.r .cell-code}\nbinary_op <- function(sep) {\n new_function(\n exprs(e1 = , e2 = ),\n expr(\n paste0(e1, !!sep, e2)\n ),\n caller_env()\n )\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\n#example\nbinary_op(\"+\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (e1, e2) \n#> paste0(e1, \"+\", e2)\n```\n\n\n:::\n:::\n\n\n<details>\n<summary>Even more LaTeX syntax</summary>\n\n\n::: {.cell}\n\n```{.r .cell-code}\nknown_func_env <- child_env(\n .parent = empty_env(),\n \n # Binary operators\n `+` = binary_op(\" + \"),\n `-` = binary_op(\" - \"),\n `*` = binary_op(\" * \"),\n `/` = binary_op(\" / \"),\n `^` = binary_op(\"^\"),\n `[` = binary_op(\"_\"),\n\n # Grouping\n `{` = unary_op(\"\\\\left{ \", \" \\\\right}\"),\n `(` = unary_op(\"\\\\left( \", \" \\\\right)\"),\n paste = paste,\n\n # Other math functions\n sqrt = unary_op(\"\\\\sqrt{\", \"}\"),\n sin = unary_op(\"\\\\sin(\", \")\"),\n cos = unary_op(\"\\\\cos(\", \")\"),\n tan = unary_op(\"\\\\tan(\", \")\"),\n log = unary_op(\"\\\\log(\", \")\"),\n abs = unary_op(\"\\\\left| \", \"\\\\right| \"),\n frac = function(a, b) {\n paste0(\"\\\\frac{\", a, \"}{\", b, \"}\")\n },\n\n # Labelling\n hat = unary_op(\"\\\\hat{\", \"}\"),\n tilde = unary_op(\"\\\\tilde{\", \"}\")\n)\n```\n:::\n\n\n</details>\n\n\n## Unknown Symbols\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnames_grabber <- function(x) {\n switch_expr(x,\n constant = character(),\n symbol = as.character(x),\n call = flat_map_chr(as.list(x[-1]), names_grabber)\n ) |>\n unique()\n}\n```\n:::\n\n\n$$x + y + f(a, b, c, 10)$$\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnames_grabber(expr(x + y + f(a, b, c, 10)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"x\" \"y\" \"a\" \"b\" \"c\"\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlobstr::ast(expr(x + y + f(a, b, c, 10)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─expr \n#> └─█─`+` \n#> ├─█─`+` \n#> │ ├─x \n#> │ └─y \n#> └─█─f \n#> ├─a \n#> ├─b \n#> ├─c \n#> └─10\n```\n\n\n:::\n:::\n\n\n\n## Unknown Functions\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncalls_grabber <- function(x) {\n switch_expr(x,\n constant = ,\n symbol = character(),\n call = {\n fname <- as.character(x[[1]])\n children <- flat_map_chr(as.list(x[-1]), calls_grabber)\n c(fname, children)\n }\n ) |>\n unique()\n}\n```\n:::\n\n\n$$f(g + b, c, d(a))$$\n\n\n::: {.cell}\n\n```{.r .cell-code}\nnames_grabber(expr(f(g + b, c, d(a))))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"g\" \"b\" \"c\" \"a\"\n```\n\n\n:::\n\n```{.r .cell-code}\ncalls_grabber(expr(f(g + b, c, d(a))))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] \"f\" \"+\" \"d\"\n```\n\n\n:::\n\n```{.r .cell-code}\nlobstr::ast(expr(f(g + b, c, d(a))))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> █─expr \n#> └─█─f \n#> ├─█─`+` \n#> │ ├─g \n#> │ └─b \n#> ├─c \n#> └─█─d \n#> └─a\n```\n\n\n:::\n:::\n\n\n---\n\n\n::: {.cell}\n\n```{.r .cell-code}\nseek_closure <- function(op) {\n # change math font for function names\n # apply ending parenthesis\n new_function(\n exprs(... = ),\n expr({\n contents <- paste(..., collapse = \", \")\n paste0(!!paste0(\"\\\\mathrm{\", op, \"}(\"), contents, \")\")\n })\n )\n}\n```\n:::\n\n\n## Bringing the LaTeX Together\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlatex_env <- function(expr) {\n \n # Unknown Functions\n calls <- calls_grabber(expr)\n call_list <- map(set_names(calls), seek_closure)\n call_env <- as_environment(call_list)\n\n # Known Functions\n known_func_env <- env_clone(known_func_env, call_env)\n\n # Unknown Symbols\n names <- names_grabber(expr)\n symbol_env <- as_environment(set_names(names), parent = known_func_env)\n\n # Known symbols\n greek_env <- env_clone(greek_env, parent = symbol_env)\n greek_env\n}\n\nto_math <- function(x) {\n expr <- enexpr(x)\n latex( #return LaTeX code\n eval_bare( #eval_bare to ensure use of latex environment \n expr, #expression (not quosure)\n latex_env(expr) #need to define latex_env\n ))\n}\n```\n:::\n\n\n### Check\n\n\n::: {.cell}\n\n```{.r .cell-code}\nto_math(sin(pi) + f(a))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> <LATEX> \\sin(\\pi) + \\mathrm{f}(a)\n```\n\n\n:::\n:::\n\n\n## Finishing the Example\n\n(TO DO)\n\n\n\n\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/fixyitpXrwY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<iframe src=\"https://www.youtube.com/embed/h3RNPyhIjas\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/pj0hTW1CtbI\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n(no video)\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/0TclsXa085Y\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/v_dkrIEdmKE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/_-uwFjO5CyM\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:30:16\tArthur Shaw:\thttps://www.w3schools.com/html/html_entities.asp\n00:32:29\tArthur Shaw:\tBeta symbol in HTML: Β\n00:56:55\tArthur Shaw:\thttps://dbplyr.tidyverse.org/articles/translation-function.html\n00:57:48\tArthur Shaw:\thttps://dtplyr.tidyverse.org/index.html\n00:58:43\tArthur Shaw:\thttps://dtplyr.tidyverse.org/articles/translation.html\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Debugging\n---\n\n## Learning objectives:\n\n- General strategy for finding and fixing errors.\n\n- Explore the `traceback()` function to locate exactly where an error occurred\n\n- Explore how to pause the execution of a function and launch environment where we can interactively explore what’s happening\n\n- Explore debugging when you’re running code non-interactively\n\n- Explore non-error problems that occasionally also need debugging\n\n## Introduction {-}\n\n> Finding bug in code, is a process of confirming the many things that we believe are true — until we find one which is not true.\n\n**—Norm Matloff**\n\n> Debugging is like being the detective in a crime movie where you're also the murderer. \n\n**-Filipe Fortes**\n\n### Strategies for finding and fixing errors {-}\n\n#### Google! {-}\nWhenever you see an error message, start by googling it. We can automate this process with the [{errorist}](https://github.com/coatless-rpkg/errorist) and [{searcher}](https://github.com/coatless-rpkg/searcher) packages. \n\n#### Make it repeatable {-}\nTo find the root cause of an error, you’re going to need to execute the code many times as you consider and reject hypotheses. It’s worth some upfront investment to make the problem both easy and fast to reproduce.\n\n#### Figure out where it is {-}\nTo find the bug, adopt the scientific method: **generate hypotheses**, **design experiments to test them**, and **record your results**. This may seem like a lot of work, but a systematic approach will end up saving you time. \n\n#### Fix it and test it {-}\nOnce you’ve found the bug, you need to figure out how to fix it and to check that the fix actually worked. It’s very useful to have automated tests in place. \n\n## Locating errors {-}\nThe most important tool for finding errors is `traceback()`, which shows you the sequence of calls (also known as the **call stack**) that lead to the error.\n\n- Here’s a simple example where `f()` calls `g()` calls `h()` calls `i()`, which checks if its argument is numeric:\n\n\nWhen we run `f(\"a\")` code in RStudio we see:\n\n\n\n\nIf you click **“Show traceback”** you see:\n\n\n\nYou read the `traceback()` output from bottom to top: the initial call is `f()`, which calls `g()`, then `h()`, then `i()`, which triggers the error. \n\n## Lazy evaluation {-}\nOne drawback to `traceback()` is that it always **linearises** the call tree, which can be confusing if there is much lazy evaluation involved. For example, take the following example where the error happens when evaluating the first argument to `f()`:\n\n\n\n\n\nNote: `rlang::with_abort()` is no longer an exported object from 'namespace:rlang'. There is an [open issue](https://github.com/hadley/adv-r/issues/1740) about a fix for the chapter but no drop-in replacement.\n\n\n## Interactive debugger {-}\nEnter the interactive debugger is wwith RStudio’s **“Rerun with Debug”** tool. This reruns the command that created the error, pausing execution where the error occurred. Otherwise, you can insert a call to `browser()` where you want to pause, and re-run the function. \n\n\n\n`browser()` is just a regular function call which means that you can run it conditionally by wrapping it in an `if` statement:\n\n\n\n\n\n\n## `browser()` commands {-}\n`browser()` provides a few special commands. \n\n\n\n- Next, `n`: executes the next step in the function.\n\n- Step into, or `s`: works like next, but if the next step is a function, it will step into that function so you can explore it interactively.\n\n- Finish, or `f`: finishes execution of the current loop or function.\n\n- Continue, `c`: leaves interactive debugging and continues regular execution of the function. \n- Stop, `Q`: stops debugging, terminates the function, and returns to the global workspace. \n\n\n## Alternatives {-}\nThere are three alternatives to using `browser()`: setting breakpoints in RStudio, `options(error = recover)`, and `debug()` and other related functions.\n\n## Breakpoints {-}\nIn RStudio, you can set a breakpoint by clicking to the left of the line number, or pressing **Shift + F9.** There are two small downsides to breakpoints:\n\n- There are a few unusual situations in which breakpoints will not work. [Read breakpoint troubleshooting for more details](https://support.posit.co/hc/en-us/articles/200534337-Breakpoint-Troubleshooting)\n\n- RStudio currently does not support conditional breakpoints.\n\n## `recover()` {-}\nWhen you set `options(error = recover)`, when you get an error, you’ll get an interactive prompt that displays the traceback and gives you the ability to interactively debug inside any of the frames:\n\n\nYou can return to default error handling with `options(error = NULL)`.\n\n## `debug()` {-}\n\nAnother approach is to call a function that inserts the `browser()` call:\n\n- `debug()` inserts a browser statement in the first line of the specified function. undebug() removes it. \n\n- `utils::setBreakpoint()` works similarly, but instead of taking a function name, it takes a file name and line number and finds the appropriate function for you.\n\n\n## Call stack {-}\nThe call stacks printed by `traceback()`, `browser()` & `where`, and `recover()` are not consistent. \n\n\n\nRStudio displays calls in the same order as `traceback()`. rlang functions use the same ordering and numbering as `recover()`, but also use indenting to reinforce the hierarchy of calls.\n\n## Non-interactive debugging {-}\n\nWhen you can’t explore interactively...\n\n### `callr::r()` {-}\n\n`callr::r(f, list(1, 2))` calls `f(1, 2)` in a fresh session to help diagnose:\n\n- Is the global environment different? Have you loaded different packages? Are objects left from previous sessions causing differences?\n\n- Is the working directory different?\n\n- Is the `PATH` environment variable different?\n\n- Is the `R_LIBS` environment variable different?\n\n### `dump.frames()` {-}\n\n`dump.frames()` is the equivalent to `recover()` for non-interactive code.\n\n\n\n### Print debugging {-}\n\nInsert numerous print statements to precisely locate the problem, and see the values of important variables. Print debugging is particularly useful for compiled code.\n\n\n\n\n### RMarkdown {-}\n\n- If you’re knitting the file using RStudio, switch to calling `rmarkdown::render(\"path/to/file.Rmd\")` instead to run the code in the current session. \n\n- For interactive debugging, you’ll need to call `sink()` in the error handler. For example, to use `recover()` with RMarkdown, you’d put the following code in your setup block:\n\n{height=\"110\"}\n\n\n\n## Non-error failures {-}\nThere are other ways for a function to fail apart from throwing an error:\n\n- A function may generate an unexpected warning. Convert warnings into errors with `options(warn = 2)` and use the the call stack.\n\n- A function may generate an unexpected message. The removal of `with_abort()` from {rlang} breaks this solution.\n\n- A function might never return. \n\n- The worst scenario is that your code might crash R completely, leaving you with no way to interactively debug your code. This indicates a bug in compiled (C or C++) code.\n\n## Link to some useful resources on debugging {-}\n\n- Jenny Bryan's [\"Object of type closure is not subsettable\"](https://github.com/jennybc/debugging#readme) talk from rstudio::conf 2020\n\n- Jenny Bryan and Jim Hester's book: [\"What They Forgot to Teach You About R\"](https://rstats.wtf/debugging-r) Ch12\n\n- Hadley's video on a [minimal reprex for a shiny app](https://www.youtube.com/watch?v=9w8ANOAlWy4) \n\n## Meeting Videos {-}\n\n### Cohort 1 {-}\n\n<iframe src=\"https://www.youtube.com/embed/ROMefwMuqXU\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2 {-}\n\n<iframe src=\"https://www.youtube.com/embed/N43p4txxxlY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3 {-}\n\n<iframe src=\"https://www.youtube.com/embed/Jdb00nepeWQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4 {-}\n\n<iframe src=\"https://www.youtube.com/embed/tOql7ZD6P58\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5 {-}\n\n<iframe src=\"https://www.youtube.com/embed/EqsSWUQ6ZW0\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6 {-}\n\n<iframe src=\"https://www.youtube.com/embed/YvT-knh1baA\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:12:43\tTrevin Flickinger:\tHello everyone!\n00:13:03\tOluwafemi Oyedele:\tHello, Good evening!!!\n00:22:10\tTrevin Flickinger:\tMy connection is slow so I’ll be in the chat\n00:32:45\tTrevin Flickinger:\tIf you start with “continue” it should error out after the first call\n00:56:18\tTrevin Flickinger:\tSys.frame(-1) shows it goes back one frame\n00:59:55\tfg:\tthanks\n01:03:11\tArthur Shaw:\tAnyone else lose the presentation?\n01:03:20\tfg:\tyes\n01:03:22\tfg:\t?\n01:04:26\tTrevin Flickinger:\tI thought that was my internet connection\n01:05:07\tTrevin Flickinger:\tThank you!\n01:08:42\tTrevin Flickinger:\tI need to use debug( ) more as well\n01:10:15\tTrevin Flickinger:\t21st works for me\n01:10:29\tOluwafemi Oyedele:\tSame here!!!\n```\n</details>\n\n### Cohort 7 {-}\n\n<iframe src=\"https://www.youtube.com/embed/T_uFW9xXoJk\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Measuring performance\n---\n\n## Learning objectives:\n\n- Understand how to improve your code for making it faster\n- Learn what are the tools for improving your code\n- Test how to profile your code\n\n\n## Introduction\n\n> \"Before you can make your code faster, you first need to figure out what’s making it slow.\"\n\n\n\n::: {.cell layout-align=\"center\"}\n::: {.cell-output-display}\n{fig-align='center' width=348}\n:::\n:::\n\n\n\n- **profile** your code: measure the run-time of each line of code using realistic inputs\n- **experiment** with alternatives to find faster code\n- **microbenchmark** to measure the difference in performance.\n\n\n\n## Profiling\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(profvis)\nlibrary(bench)\n```\n:::\n\n\n\nThe tool to use is a **profiler**, it allows for **sampling** the code performance through stopping the execution of code every few milliseconds and recording all the steps.\n\nExample:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nf <- function() {\n pause(0.1)\n g()\n h()\n}\ng <- function() {\n pause(0.1)\n h()\n}\nh <- function() {\n pause(0.1)\n}\n```\n:::\n\n\nProfile the execution of f():\n\n profvis::pause() is used instead of Sys.sleep()\n profile f(), with utils::Rprof()\n \n\n::: {.cell}\n\n```{.r .cell-code}\ntmp <- tempfile()\nRprof(tmp, interval = 0.1)\nf()\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> NULL\n```\n\n\n:::\n\n```{.r .cell-code}\nRprof(NULL)\nwriteLines(readLines(tmp))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> sample.interval=100000\n#> \"pause\" \"f\" \"eval\" \"eval\" \"withVisible\" \"withCallingHandlers\" \"eval\" \"eval\" \"with_handlers\" \"doWithOneRestart\" \"withOneRestart\" \"withRestartList\" \"doWithOneRestart\" \"withOneRestart\" \"withRestartList\" \"withRestarts\" \"evaluate::evaluate\" \"evaluate\" \"in_dir\" \"in_input_dir\" \"eng_r\" \"block_exec\" \"call_block\" \"process_group\" \"withCallingHandlers\" \"xfun:::handle_error\" \"process_file\" \"knitr::knit\" \"rmarkdown::render\" \"execute\" \".main\" \n#> \"pause\" \"g\" \"f\" \"eval\" \"eval\" \"withVisible\" \"withCallingHandlers\" \"eval\" \"eval\" \"with_handlers\" \"doWithOneRestart\" \"withOneRestart\" \"withRestartList\" \"doWithOneRestart\" \"withOneRestart\" \"withRestartList\" \"withRestarts\" \"evaluate::evaluate\" \"evaluate\" \"in_dir\" \"in_input_dir\" \"eng_r\" \"block_exec\" \"call_block\" \"process_group\" \"withCallingHandlers\" \"xfun:::handle_error\" \"process_file\" \"knitr::knit\" \"rmarkdown::render\" \"execute\" \".main\" \n#> \"pause\" \"h\" \"g\" \"f\" \"eval\" \"eval\" \"withVisible\" \"withCallingHandlers\" \"eval\" \"eval\" \"with_handlers\" \"doWithOneRestart\" \"withOneRestart\" \"withRestartList\" \"doWithOneRestart\" \"withOneRestart\" \"withRestartList\" \"withRestarts\" \"evaluate::evaluate\" \"evaluate\" \"in_dir\" \"in_input_dir\" \"eng_r\" \"block_exec\" \"call_block\" \"process_group\" \"withCallingHandlers\" \"xfun:::handle_error\" \"process_file\" \"knitr::knit\" \"rmarkdown::render\" \"execute\" \".main\" \n#> \"pause\" \"h\" \"f\" \"eval\" \"eval\" \"withVisible\" \"withCallingHandlers\" \"eval\" \"eval\" \"with_handlers\" \"doWithOneRestart\" \"withOneRestart\" \"withRestartList\" \"doWithOneRestart\" \"withOneRestart\" \"withRestartList\" \"withRestarts\" \"evaluate::evaluate\" \"evaluate\" \"in_dir\" \"in_input_dir\" \"eng_r\" \"block_exec\" \"call_block\" \"process_group\" \"withCallingHandlers\" \"xfun:::handle_error\" \"process_file\" \"knitr::knit\" \"rmarkdown::render\" \"execute\" \".main\"\n```\n\n\n:::\n:::\n\n \n \n**Visualising profiles**\n\nMakes easier to build up a mental model of what you need to change:\n\n profvis::profvis()\n utils::summaryRprof()\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsource(\"scripts/profiling-example.R\")\nprofvis(f())\n```\n\n::: {.cell-output-display}\n\n```{=html}\n<div class=\"profvis html-widget html-fill-item\" 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profiling and the garbage collector**\n\nProfiling a loop that modifies an existing variable:\n\n::: {.cell}\n\n```{.r .cell-code}\nprofvis::profvis({\n x <- integer()\nfor (i in 1:1e4) {\n x <- c(x, i)\n}\n})\n```\n\n::: {.cell-output-display}\n\n```{=html}\n<div class=\"profvis html-widget html-fill-item\" id=\"htmlwidget-5a6fde18c6928dde5df7\" style=\"width:100%;height:600px;\"></div>\n<script type=\"application/json\" 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can figure out what is the source of the problem by looking at the memory column. In this case, **copy-on-modify** acts in each iteration of the loop creating another copy of x.\n\n\n**Limitations**\n\n- Profiling does not extend to C code\n- Anonymous functions are hard to figure out\n- Arguments are evaluated inside another function\n\n\n### Exercise\n\n::: {.cell}\n\n```{.r .cell-code}\nprofvis::profvis({\n f <- function(n = 1e5) {\n x <- rep(1, n)\n rm(x)\n}\n},torture = TRUE)\n```\n:::\n\n\n ?rm()\n \n[solution](https://advanced-r-solutions.rbind.io/measuring-performance.html) \n \n## Microbenchmarking\n\n\n*Measurement of the performance of a very small piece of code* is useful for comparing small snippets of code for specific tasks.\n\n\n::: {.cell layout-align=\"center\"}\n::: {.cell-output-display}\n{fig-align='center' width=159}\n:::\n:::\n\n\n\nThe {bench} package uses a high precision time.\n\n bench::mark()\n \n \n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(bench)\nx <- runif(100)\n(lb <- bench::mark(\n sqrt(x),\n x ^ 0.5\n))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 6\n#> expression min median `itr/sec` mem_alloc `gc/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl> <bch:byt> <dbl>\n#> 1 sqrt(x) 200ns 400ns 2112914. 848B 0\n#> 2 x^0.5 2.3µs 2.7µs 350293. 848B 0\n```\n\n\n:::\n:::\n\n- heavily right-skewed distribution\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nrequire(ggbeeswarm)\n```\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Loading required package: ggbeeswarm\n```\n\n\n:::\n\n::: {.cell-output .cell-output-stderr}\n\n```\n#> Loading required package: ggplot2\n```\n\n\n:::\n\n```{.r .cell-code}\nplot(lb)\n```\n\n::: {.cell-output-display}\n{width=672}\n:::\n:::\n\n\n\n## Resources\n\n- [profvis package](https://rstudio.github.io/profvis/)\n- [bench package](https://cran.r-project.org/web/packages/bench/bench.pdf)\n- [solutions](https://advanced-r-solutions.rbind.io/measuring-performance.html)\n\n\n\n\n\n\n\n## Meeting Videos\n\n### Cohort 1\n\n(no video)\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/_zeLDufwTwY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/Jdb00nepeWQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/sCso4FAF1DE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/pOaiDK7J7EE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/d_pzz_AsoRQ\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/4hngR1c9oP4\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Improving performance\n---\n\n## Overview\n\n1. Code organization\n2. Check for existing solutions\n3. Do as little as possible\n4. Vectorise\n5. Avoid Copies\n\n## Organizing code\n\n- Write a function for each approach\n\n::: {.cell}\n\n```{.r .cell-code}\nmean1 <- function(x) mean(x)\nmean2 <- function(x) sum(x) / length(x)\n```\n:::\n\n- Keep old functions that you've tried, even the failures\n- Generate a representative test case\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- runif(1e5)\n```\n:::\n\n- Use `bench::mark` to compare the different versions (and include unit tests)\n\n::: {.cell}\n\n```{.r .cell-code}\nbench::mark(\n mean1(x),\n mean2(x)\n)[c(\"expression\", \"min\", \"median\", \"itr/sec\", \"n_gc\")]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 4\n#> expression min median `itr/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl>\n#> 1 mean1(x) 122.6µs 131.7µs 7224.\n#> 2 mean2(x) 60.4µs 67.4µs 13986.\n```\n\n\n:::\n:::\n\n\n## Check for Existing Solution\n- CRAN task views (http://cran.rstudio.com/web/views/)\n- Reverse dependencies of Rcpp (https://cran.r-project.org/web/packages/Rcpp/)\n- Talk to others!\n - Google (rseek)\n - Stackoverflow ([R])\n - https://community.rstudio.com/\n - DSLC community\n\n## Do as little as possible\n- use a function tailored to a more specific type of input or output, or to a more specific problem\n - `rowSums()`, `colSums()`, `rowMeans()`, and `colMeans()` are faster than equivalent invocations that use `apply()` because they are vectorised\n - `vapply()` is faster than `sapply()` because it pre-specifies the output type\n - `any(x == 10)` is much faster than `10 %in% x` because testing equality is simpler than testing set inclusion\n- Some functions coerce their inputs into a specific type. If your input is not the right type, the function has to do extra work\n - e.g. `apply()` will always turn a dataframe into a matrix\n- Other examples\n - `read.csv()`: specify known column types with `colClasses`. (Also consider\n switching to `readr::read_csv()` or `data.table::fread()` which are \n considerably faster than `read.csv()`.)\n\n - `factor()`: specify known levels with `levels`.\n\n - `cut()`: don't generate labels with `labels = FALSE` if you don't need them,\n or, even better, use `findInterval()` as mentioned in the \"see also\" section\n of the documentation.\n \n - `unlist(x, use.names = FALSE)` is much faster than `unlist(x)`.\n\n - `interaction()`: if you only need combinations that exist in the data, use\n `drop = TRUE`.\n \n## Avoiding Method Dispatch\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- runif(1e2)\nbench::mark(\n mean(x),\n mean.default(x)\n)[c(\"expression\", \"min\", \"median\", \"itr/sec\", \"n_gc\")]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 4\n#> expression min median `itr/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl>\n#> 1 mean(x) 2.4µs 3.1µs 284100.\n#> 2 mean.default(x) 800ns 1.2µs 822341.\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- runif(1e2)\nbench::mark(\n mean(x),\n mean.default(x),\n .Internal(mean(x))\n)[c(\"expression\", \"min\", \"median\", \"itr/sec\", \"n_gc\")]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 3 × 4\n#> expression min median `itr/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl>\n#> 1 mean(x) 2.5µs 3.5µs 270278.\n#> 2 mean.default(x) 900ns 1.2µs 837472.\n#> 3 .Internal(mean(x)) 100ns 200ns 4738440.\n```\n\n\n:::\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- runif(1e4)\nbench::mark(\n mean(x),\n mean.default(x),\n .Internal(mean(x))\n)[c(\"expression\", \"min\", \"median\", \"itr/sec\", \"n_gc\")]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 3 × 4\n#> expression min median `itr/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl>\n#> 1 mean(x) 14.2µs 16µs 60044.\n#> 2 mean.default(x) 12.7µs 14.6µs 65783.\n#> 3 .Internal(mean(x)) 12µs 13.2µs 75085.\n```\n\n\n:::\n:::\n\n\n## Avoiding Input Coercion\n- `as.data.frame()` is quite slow because it coerces each element into a data frame and then `rbind()`s them together\n- instead, if you have a named list with vectors of equal length, you can directly transform it into a data frame\n\n\n::: {.cell}\n\n```{.r .cell-code}\nquickdf <- function(l) {\n class(l) <- \"data.frame\"\n attr(l, \"row.names\") <- .set_row_names(length(l[[1]]))\n l\n}\nl <- lapply(1:26, function(i) runif(1e3))\nnames(l) <- letters\nbench::mark(\n as.data.frame = as.data.frame(l),\n quick_df = quickdf(l)\n)[c(\"expression\", \"min\", \"median\", \"itr/sec\", \"n_gc\")]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 4\n#> expression min median `itr/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl>\n#> 1 as.data.frame 538.2µs 686.2µs 1359.\n#> 2 quick_df 3.2µs 4.6µs 199551.\n```\n\n\n:::\n:::\n\n\n*Caveat!* This method is fast because it's dangerous!\n\n## Vectorise\n- vectorisation means finding the existing R function that is implemented in C and most closely applies to your problem\n- Vectorised functions that apply to many scenarios\n - `rowSums()`, `colSums()`, `rowMeans()`, and `colMeans()`\n - Vectorised subsetting can lead to big improvements in speed\n - `cut()` and `findInterval()` for converting continuous variables to categorical\n - Be aware of vectorised functions like `cumsum()` and `diff()`\n - Matrix algebra is a general example of vectorisation\n\n## Avoiding copies\n\n- Whenever you use c(), append(), cbind(), rbind(), or paste() to create a bigger object, R must first allocate space for the new object and then copy the old object to its new home.\n\n\n::: {.cell}\n\n```{.r .cell-code}\nrandom_string <- function() {\n paste(sample(letters, 50, replace = TRUE), collapse = \"\")\n}\nstrings10 <- replicate(10, random_string())\nstrings100 <- replicate(100, random_string())\ncollapse <- function(xs) {\n out <- \"\"\n for (x in xs) {\n out <- paste0(out, x)\n }\n out\n}\nbench::mark(\n loop10 = collapse(strings10),\n loop100 = collapse(strings100),\n vec10 = paste(strings10, collapse = \"\"),\n vec100 = paste(strings100, collapse = \"\"),\n check = FALSE\n)[c(\"expression\", \"min\", \"median\", \"itr/sec\", \"n_gc\")]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 4 × 4\n#> expression min median `itr/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl>\n#> 1 loop10 13.3µs 17.9µs 52625.\n#> 2 loop100 376.7µs 470.5µs 2074.\n#> 3 vec10 2.2µs 2.9µs 328368.\n#> 4 vec100 13.5µs 16.4µs 58208.\n```\n\n\n:::\n:::\n\n\n## Case study: t-test\n\n\n::: {.cell}\n\n```{.r .cell-code}\nm <- 1000\nn <- 50\nX <- matrix(rnorm(m * n, mean = 10, sd = 3), nrow = m)\ngrp <- rep(1:2, each = n / 2)\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# formula interface\nsystem.time(\n for (i in 1:m) {\n t.test(X[i, ] ~ grp)$statistic\n }\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> user system elapsed \n#> 0.30 0.00 0.33\n```\n\n\n:::\n\n```{.r .cell-code}\n# provide two vectors\nsystem.time(\n for (i in 1:m) {\n t.test(X[i, grp == 1], X[i, grp == 2])$statistic\n }\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> user system elapsed \n#> 0.08 0.00 0.10\n```\n\n\n:::\n:::\n\n\nAdd functionality to save values\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncompT <- function(i){\n t.test(X[i, grp == 1], X[i, grp == 2])$statistic\n}\nsystem.time(t1 <- purrr::map_dbl(1:m, compT))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> user system elapsed \n#> 0.09 0.00 0.08\n```\n\n\n:::\n:::\n\n\nIf you look at the source code of `stats:::t.test.default()`, you’ll see that it does a lot more than just compute the t-statistic.\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Do less work\nmy_t <- function(x, grp) {\n t_stat <- function(x) {\n m <- mean(x)\n n <- length(x)\n var <- sum((x - m) ^ 2) / (n - 1)\n list(m = m, n = n, var = var)\n }\n g1 <- t_stat(x[grp == 1])\n g2 <- t_stat(x[grp == 2])\n se_total <- sqrt(g1$var / g1$n + g2$var / g2$n)\n (g1$m - g2$m) / se_total\n}\nsystem.time(t2 <- purrr::map_dbl(1:m, ~ my_t(X[.,], grp)))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> user system elapsed \n#> 0.03 0.00 0.01\n```\n\n\n:::\n\n```{.r .cell-code}\nstopifnot(all.equal(t1, t2))\n```\n:::\n\n\nThis gives us a six-fold speed improvement!\n\n\n::: {.cell}\n\n```{.r .cell-code}\n# Vectorise it\nrowtstat <- function(X, grp){\n t_stat <- function(X) {\n m <- rowMeans(X)\n n <- ncol(X)\n var <- rowSums((X - m) ^ 2) / (n - 1)\n list(m = m, n = n, var = var)\n }\n g1 <- t_stat(X[, grp == 1])\n g2 <- t_stat(X[, grp == 2])\n se_total <- sqrt(g1$var / g1$n + g2$var / g2$n)\n (g1$m - g2$m) / se_total\n}\nsystem.time(t3 <- rowtstat(X, grp))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> user system elapsed \n#> 0.00 0.00 0.02\n```\n\n\n:::\n\n```{.r .cell-code}\nstopifnot(all.equal(t1, t3))\n```\n:::\n\n\n1000 times faster than when we started!\n\n## Other techniques\n* [Read R blogs](http://www.r-bloggers.com/) to see what performance\n problems other people have struggled with, and how they have made their\n code faster.\n\n* Read other R programming books, like The Art of R Programming or Patrick Burns'\n [_R Inferno_](http://www.burns-stat.com/documents/books/the-r-inferno/) to\n learn about common traps.\n\n* Take an algorithms and data structure course to learn some\n well known ways of tackling certain classes of problems. I have heard\n good things about Princeton's\n [Algorithms course](https://www.coursera.org/course/algs4partI) offered on\n Coursera.\n \n* Learn how to parallelise your code. Two places to start are\n Parallel R and Parallel Computing for Data Science\n\n* Read general books about optimisation like Mature optimisation\n or the Pragmatic Programmer\n \n* Read more R code. StackOverflow, R Mailing List, DSLC, GitHub, etc.\n\n## Meeting Videos\n\n### Cohort 1\n\n(no video)\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/fSdAqlkeq6I\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/yCkvUcT7wW8\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/LCaqvuv3JNg\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/pOaiDK7J7EE\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/UaXimKd3vg8\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n<summary> Meeting chat log </summary>\n\n```\n00:24:42\tArthur Shaw:\tI wonder if there's a task view for R Universe: https://r-universe.dev/search/\n01:01:13\tArthur Shaw:\thttps://www.alexejgossmann.com/benchmarking_r/\n01:04:34\tTrevin:\tI agree that the chapter is a good jumping off point. Gonna have to dig into some of the listed resources 😄\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/rOkrHvN8Uqg\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:23:48\tRon Legere:\thttps://www.mathworks.com/help/matlab/matlab_prog/vectorization.html\n```\n</details>\n",
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+ "markdown": "---\nengine: knitr\ntitle: Rewriting R code in C++\n---\n\n## Learning objectives:\n\n- Learn to improve performance by rewriting bottlenecks in C++\n\n- Introduction to the [{Rcpp} package](https://www.rcpp.org/)\n\n## Introduction\n\nIn this chapter we'll learn how to rewrite **R** code in **C++** to make it faster using the **Rcpp package**. The **Rcpp** package makes it simple to connect C++ to R! With C++ you can fix:\n\n- Loops that can't be easily vectorised because subsequent iterations depend on previous ones.\n\n- Recursive functions, or problems which involve calling functions millions of times. The overhead of calling a function in C++ is much lower than in R.\n\n- Problems that require advanced data structures and algorithms that R doesn't provide. Through the **standard template library (STL)**, C++ has efficient implementations of many important data structures, from ordered maps to double-ended queue\n\n<center>Like how?</center>\n\n<center> </center>\n\n<center></center>\n\n \n\n## Getting started with C++\n\n\n::: {.cell}\n\n```{.r .cell-code}\nlibrary(Rcpp)\n```\n:::\n\n\nInstall a C++ compiler:\n\n- Rtools, on Windows\n- Xcode, on Mac\n- Sudo apt-get install r-base-dev or similar, on Linux.\n\n\n### First example {-}\n\nRcpp compiling the C++ code:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncppFunction('int add(int x, int y, int z) {\n int sum = x + y + z;\n return sum;\n}')\n# add works like a regular R function\nadd\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> function (x, y, z) \n#> .Call(<pointer: 0x00007ff9d7b215f0>, x, y, z)\n```\n\n\n:::\n\n```{.r .cell-code}\nadd(1, 2, 3)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 6\n```\n\n\n:::\n:::\n\n\nSome things to note:\n\n\n- The syntax to create a function is different.\n- Types of inputs and outputs must be explicitly declared\n- Use = for assignment, not `<-`.\n- Every statement is terminated by a ;\n- C++ has it's own name for the types we are used to:\n - scalar types are `int`, `double`, `bool` and `String`\n - vector types (for Rcpp) are `IntegerVector`, `NumericVector`, `LogicalVector` and `CharacterVector`\n - Other R types are available in C++: `List`, `Function`, `DataFrame`, and more.\n \n- Explicitly use a `return` statement to return a value from a function.\n\n \n\n## Example with scalar input and output {-}\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsignR <- function(x) {\n if (x > 0) {\n 1\n } else if (x == 0) {\n 0\n } else {\n -1\n }\n}\n\na <- -0.5\nb <- 0.5\nc <- 0\nsignR(c)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 0\n```\n\n\n:::\n:::\n\n\nTranslation:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncppFunction('int signC(int x) {\n if (x > 0) {\n return 1;\n } else if (x == 0) {\n return 0;\n } else {\n return -1;\n }\n}')\n```\n:::\n\n\n* Note that the `if` syntax is identical! Not everything is different!\n\n## Vector Input, Scalar output:{-}\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsumR <- function(x) {\n total <- 0\n for (i in seq_along(x)) {\n total <- total + x[i]\n }\n total\n}\n\nx<- runif(100)\nsumR(x)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 48.57133\n```\n\n\n:::\n:::\n\n\nTranslation:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncppFunction('double sumC(NumericVector x) {\n int n = x.size();\n double total = 0;\n for(int i = 0; i < n; ++i) {\n total += x[i];\n }\n return total;\n}')\n```\n:::\n\n\nSome observations:\n\n- vector indices *start at 0*\n- The for statement has a different syntax: for(init; check; increment)\n- Methods are called with `.`\n- `total += x[i]` is equivalent to `total = total + x[i]`.\n- other in-place operators are `-=`, `*=`, `and /=`\n\n\nTo check for the fastest way we can use:\n\n\n::: {.cell}\n\n```{.r .cell-code}\n?bench::mark\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- runif(1e3)\nbench::mark(\n sum(x),\n sumC(x),\n sumR(x)\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 3 × 6\n#> expression min median `itr/sec` mem_alloc `gc/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl> <bch:byt> <dbl>\n#> 1 sum(x) 700ns 800ns 1176844. 0B 0\n#> 2 sumC(x) 800ns 1.1µs 865688. 0B 0\n#> 3 sumR(x) 13.8µs 19.7µs 48653. 0B 0\n```\n\n\n:::\n:::\n\n\n## Vector input and output {-}\n\n\n::: {.cell}\n\n```{.r .cell-code}\npdistR <- function(x, ys) {\n sqrt((x - ys) ^ 2)\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncppFunction('NumericVector pdistC(double x, NumericVector ys) {\n int n = ys.size();\n NumericVector out(n);\n\n for(int i = 0; i < n; ++i) {\n out[i] = sqrt(pow(ys[i] - x, 2.0));\n }\n return out;\n}')\n```\n:::\n\n\nNote: uses `pow()`, not `^`, for exponentiation\n\n\n::: {.cell}\n\n```{.r .cell-code}\ny <- runif(1e6)\nbench::mark(\n pdistR(0.5, y),\n pdistC(0.5, y)\n)[1:6]\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 6\n#> expression min median `itr/sec` mem_alloc `gc/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl> <bch:byt> <dbl>\n#> 1 pdistR(0.5, y) 3.23ms 3.69ms 268. 7.63MB 136.\n#> 2 pdistC(0.5, y) 1.66ms 2.08ms 473. 7.63MB 176.\n```\n\n\n:::\n:::\n\n\n## Source your C++ code {-}\n\nSource stand-alone C++ files into R using `sourceCpp()`\n\n\nC++ files have extension `.cpp`\n\n```\n#include <Rcpp.h>\nusing namespace Rcpp;\n```\n\nAnd for each function that you want available within R, you need to prefix it with:\n\n```\n// [[Rcpp::export]]\n```\n\nInside a cpp file you can include `R` code using special comments\n\n```\n/*** R\nrcode here\n*/\n```\n\n\n\n### Example {-}\n\nThis block in Rmarkdown uses `{Rcpp}` as a short hand for engine = \"Rcpp\". \n\n\n::: {.cell}\n\n```{.cpp .cell-code}\n#include <Rcpp.h>\nusing namespace Rcpp;\n\n// [[Rcpp::export]]\ndouble meanC(NumericVector x) {\n int n = x.size();\n double total = 0;\n\n for(int i = 0; i < n; ++i) {\n total += x[i];\n }\n return total / n;\n}\n\n/*** R\nx <- runif(1e5)\nbench::mark(\n mean(x),\n meanC(x)\n)\n*/\n```\n:::\n\n\nNOTE: For some reason although the r code above runs, `knit` doesn't include the output. Why?\n\n\n::: {.cell}\n\n```{.r .cell-code}\nx <- runif(1e5)\nbench::mark(\n mean(x),\n meanC(x)\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 6\n#> expression min median `itr/sec` mem_alloc `gc/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl> <bch:byt> <dbl>\n#> 1 mean(x) 122.6µs 136.8µs 6910. 0B 0\n#> 2 meanC(x) 40.5µs 50.8µs 18955. 0B 0\n```\n\n\n:::\n:::\n\n\n\n\n## Data frames, functions, and attributes\n\n### Lists and Dataframes {-}\n\nContrived example to illustrate how to access a dataframe from c++:\n\n\n::: {.cell}\n\n```{.cpp .cell-code}\n#include <Rcpp.h>\nusing namespace Rcpp;\n\n// [[Rcpp::export]]\ndouble mpe(List mod) {\n if (!mod.inherits(\"lm\")) stop(\"Input must be a linear model\");\n\n NumericVector resid = as<NumericVector>(mod[\"residuals\"]);\n NumericVector fitted = as<NumericVector>(mod[\"fitted.values\"]);\n\n int n = resid.size();\n double err = 0;\n for(int i = 0; i < n; ++i) {\n err += resid[i] / (fitted[i] + resid[i]);\n }\n return err / n;\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nmod <- lm(mpg ~ wt, data = mtcars)\nmpe(mod)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] -0.01541615\n```\n\n\n:::\n:::\n\n\n- Note that you must *cast* the values to the required type. C++ needs to know the types in advance.\n\n### Functions {-}\n\n\n::: {.cell}\n\n```{.cpp .cell-code}\n#include <Rcpp.h>\nusing namespace Rcpp;\n\n// [[Rcpp::export]]\nRObject callWithOne(Function f) {\n return f(1);\n}\n```\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\ncallWithOne(function(x) x + 1)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 2\n```\n\n\n:::\n:::\n\n\n\n* Other values can be accessed from c++ including\n\n * attributes (use: `.attr()`. Also `.names()` is alias for name attribute.\n * `Environment`, `DottedPair`, `Language`, `Symbol` , etc. \n\n## Missing values\n\n### Missing values behave differently for C++ scalers{-}\n\n* Scalar NA's in Cpp : `NA_LOGICAL`, `NA_INTEGER`, `NA_REAL`, `NA_STRING`.\n\n* Integers (`int`) stores R NA's as the smallest integer. Better to use length 1 `IntegerVector`\n* Doubles use IEEE 754 NaN , which behaves a bit differently for logical expressions (but ok for math expressions). \n\n\n::: {.cell}\n\n```{.r .cell-code}\nevalCpp(\"NA_REAL || FALSE\")\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] TRUE\n```\n\n\n:::\n:::\n\n\n* Strings are a class from Rcpp, so they handle missing values fine.\n\n* `bool` can only hold two values, so be careful. Consider using vectors of length 1 or coercing to `int`\n\n\n### Vectors\n\n* Vectors are all type introduced by RCpp and know how to handle missing values if you use the specific type for that vector.\n\n\n::: {.cell}\n\n```{.cpp .cell-code}\n#include <Rcpp.h>\nusing namespace Rcpp;\n\n// [[Rcpp::export]]\nList missing_sampler() {\n return List::create(\n NumericVector::create(NA_REAL),\n IntegerVector::create(NA_INTEGER),\n LogicalVector::create(NA_LOGICAL),\n CharacterVector::create(NA_STRING)\n );\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nstr(missing_sampler())\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> List of 4\n#> $ : num NA\n#> $ : int NA\n#> $ : logi NA\n#> $ : chr NA\n```\n\n\n:::\n:::\n\n\n## Standard Template Library\n\nSTL provides powerful data structures and algorithms for C++. \n\n### Iterators {-}\n\nIterators are used extensively in the STL to abstract away details of underlying data structures.\n\nIf you an iterator `it`, you can:\n\n- Get the value by 'dereferencing' with `*it`\n- Advance to the next value with `++it`\n- Compare iterators (locations) with `==`\n\n\n### Algorithms {-}\n\n* The real power of iterators comes from using them with STL algorithms. \n \n* A good reference is [https://en.cppreference.com/w/cpp/algorithm]\n\n* Book provides examples using `accumulate` and `upper_buond`\n\n* Another Example:\n\n\n::: {.cell}\n\n```{.cpp .cell-code}\n\n#include <algorithm>\n#include <Rcpp.h>\n\nusing namespace Rcpp;\n \n \n// Explicit iterator version\n \n// [[Rcpp::export]]\nNumericVector square_C_it(NumericVector x){\n NumericVector out(x.size());\n // Each container has its own iterator type\n NumericVector::iterator in_it;\n NumericVector::iterator out_it;\n \n for(in_it = x.begin(), out_it = out.begin(); in_it != x.end(); ++in_it, ++out_it) {\n *out_it = pow(*in_it,2);\n }\n \n return out;\n \n}\n \n \n// Use algorithm 'transform'\n \n// [[Rcpp::export]]\nNumericVector square_C(NumericVector x) {\n \n NumericVector out(x.size());\n \n \n std::transform(x.begin(),x.end(), out.begin(),\n [](double v) -> double { return v*v; });\n return out;\n}\n```\n:::\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsquare_C(c(1.0,2.0,3.0))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 4 9\n```\n\n\n:::\n:::\n\n\n::: {.cell}\n\n```{.r .cell-code}\nsquare_C_it(c(1.0,2.0,3.0))\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> [1] 1 4 9\n```\n\n\n:::\n:::\n\n\n## Data Structures {-}\n\nSTL provides a large set of data structures. Some of the most important:\n\n* `std::vector` - like an `R` vector, except knows how to grow efficiently\n\n* `std::unordered_set` - unique set of values. Ordered version `std::set`. Unordered is more efficient.\n\n* `std::map` - Moslty similar to `R` lists, provide an association between a key and a value. There is also an unordered version. \n\nA quick example illustrating the `map`:\n\n\n::: {.cell}\n\n```{.cpp .cell-code}\n#include <Rcpp.h>\nusing namespace Rcpp;\n\n// [[Rcpp::export]]\nstd::map<double, int> tableC(NumericVector x) {\n // Note the types are <key, value>\n std::map<double, int> counts;\n\n int n = x.size();\n for (int i = 0; i < n; i++) {\n counts[x[i]]++;\n }\n\n return counts;\n}\n```\n:::\n\n\n\n\n::: {.cell}\n\n```{.r .cell-code}\nres = tableC(c(1,1,2,1,4,5))\nres\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> 1 2 4 5 \n#> 3 1 1 1\n```\n\n\n:::\n:::\n\n\n* Note that the map is converted to a named vector in this case on return\n\n \nTo learn more about the STL data structures see [containers](https://en.cppreference.com/w/cpp/container) at `cppreference`\n\n## Case Studies\n\n\n\nReal life uses of C++ to replace slow R code.\n\n\n## Case study 1: Gibbs sampler {-}\n\nThe [Gibbs sampler](https://en.wikipedia.org/wiki/Gibbs_sampling) is a method for estimating parameters expectations. It is a **MCMC algorithm** that has been adapted to sample from multidimensional target distributions. Gibbs sampling generates a **Markov chain** of samples, each of which is correlated with nearby samples. \n\n[Example blogged by Dirk Eddelbuettel](https://dirk.eddelbuettel.com/blog/2011/07/14/), the R and C++ code is very similar but runs about 20 times faster.\n\n> \"Darren Wilkinson stresses the rather pragmatic aspects of how fast and/or easy it is to write the code, rather than just the mere runtime.\n\n\n<center></center>\n\n\nR code:\n\n\n::: {.cell}\n\n```{.r .cell-code}\ngibbs_r <- function(N, thin) {\n mat <- matrix(nrow = N, ncol = 2)\n x <- y <- 0\n\n for (i in 1:N) {\n for (j in 1:thin) {\n x <- rgamma(1, 3, y * y + 4)\n y <- rnorm(1, 1 / (x + 1), 1 / sqrt(2 * (x + 1)))\n }\n mat[i, ] <- c(x, y)\n }\n mat\n}\n```\n:::\n\n\nActions to convert R to C++: \n\n- Add type declarations to all variables \n- Use `(` instead of `[` to index into the matrix \n- Subscript the results of `rgamma` and `rnorm` to convert from a vector into a scalar.\n\n\n::: {.cell}\n\n```{.cpp .cell-code}\n#include <Rcpp.h>\nusing namespace Rcpp;\n\n// [[Rcpp::export]]\nNumericMatrix gibbs_cpp(int N, int thin) {\n NumericMatrix mat(N, 2);\n double x = 0, y = 0;\n\n for(int i = 0; i < N; i++) {\n for(int j = 0; j < thin; j++) {\n x = rgamma(1, 3, 1 / (y * y + 4))[0];\n y = rnorm(1, 1 / (x + 1), 1 / sqrt(2 * (x + 1)))[0];\n }\n mat(i, 0) = x;\n mat(i, 1) = y;\n }\n\n return(mat);\n}\n```\n:::\n\n\nChecking who's best:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nbench::mark(\n gibbs_r(100, 10),\n gibbs_cpp(100, 10),\n check = FALSE\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 2 × 6\n#> expression min median `itr/sec` mem_alloc `gc/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl> <bch:byt> <dbl>\n#> 1 gibbs_r(100, 10) 1.37ms 1.88ms 517. 103.22KB 28.9\n#> 2 gibbs_cpp(100, 10) 148.5µs 211.3µs 4600. 1.61KB 29.6\n```\n\n\n:::\n:::\n\n\n## Case study 2: predict a model response from three inputs {-}\n\n[Rcpp is smoking fast for agent based models in data frames](https://gweissman.github.io/post/rcpp-is-smoking-fast-for-agent-based-models-in-data-frames/) by Gary Weissman, MD, MSHP.\n\nStarts with this code:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvacc1a <- function(age, female, ily) {\n p <- 0.25 + 0.3 * 1 / (1 - exp(0.04 * age)) + 0.1 * ily\n p <- p * if (female) 1.25 else 0.75\n p <- max(0, p)\n p <- min(1, p)\n p\n}\n```\n:::\n\n\nR code with a for loop:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvacc1 <- function(age, female, ily) {\n n <- length(age)\n out <- numeric(n)\n for (i in seq_len(n)) {\n out[i] <- vacc1a(age[i], female[i], ily[i])\n }\n out\n}\n```\n:::\n\n\nVectorized R code:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nvacc2 <- function(age, female, ily) {\n p <- 0.25 + 0.3 * 1 / (1 - exp(0.04 * age)) + 0.1 * ily\n p <- p * ifelse(female, 1.25, 0.75)\n p <- pmax(0, p)\n p <- pmin(1, p)\n p\n}\n```\n:::\n\n\nC++:\n\n\n::: {.cell}\n\n```{.cpp .cell-code}\n#include <Rcpp.h>\nusing namespace Rcpp;\n\ndouble vacc3a(double age, bool female, bool ily){\n double p = 0.25 + 0.3 * 1 / (1 - exp(0.04 * age)) + 0.1 * ily;\n p = p * (female ? 1.25 : 0.75);\n p = std::max(p, 0.0);\n p = std::min(p, 1.0);\n return p;\n}\n\n// [[Rcpp::export]]\nNumericVector vacc3(NumericVector age, LogicalVector female, \n LogicalVector ily) {\n int n = age.size();\n NumericVector out(n);\n\n for(int i = 0; i < n; ++i) {\n out[i] = vacc3a(age[i], female[i], ily[i]);\n }\n\n return out;\n}\n```\n:::\n\n\nSample data:\n\n\n::: {.cell}\n\n```{.r .cell-code}\nn <- 1000\nage <- rnorm(n, mean = 50, sd = 10)\nfemale <- sample(c(T, F), n, rep = TRUE)\nily <- sample(c(T, F), n, prob = c(0.8, 0.2), rep = TRUE)\n\nstopifnot(\n all.equal(vacc1(age, female, ily), vacc2(age, female, ily)),\n all.equal(vacc1(age, female, ily), vacc3(age, female, ily))\n)\n```\n:::\n\n\n<center>**Who's faster?**</center>\n<center></center>\n\n\n::: {.cell}\n\n```{.r .cell-code}\nbench::mark(\n vacc1 = vacc1(age, female, ily),\n vacc2 = vacc2(age, female, ily),\n vacc3 = vacc3(age, female, ily)\n)\n```\n\n::: {.cell-output .cell-output-stdout}\n\n```\n#> # A tibble: 3 × 6\n#> expression min median `itr/sec` mem_alloc `gc/sec`\n#> <bch:expr> <bch:tm> <bch:tm> <dbl> <bch:byt> <dbl>\n#> 1 vacc1 779.8µs 1.01ms 929. 7.86KB 45.6 \n#> 2 vacc2 48.1µs 61.7µs 15618. 146.68KB 31.1 \n#> 3 vacc3 30.8µs 38.7µs 25332. 11.98KB 5.07\n```\n\n\n:::\n:::\n\n\n## Resources\n\n- [Rcpp: Seamless R and C++ Integration](https:\\\\Rcpp.org)\n- [cpp-tutorial](https://www.learncpp.com) is often recommended. Lots of ads though!\n- [cpp-reference](https://en.cppreference.com/w/cpp)\n- [C++20 for Programmers](https://www.pearson.com/en-us/subject-catalog/p/c20-for-programmers-an-objects-natural-approach/P200000000211/9780137570461) is a newer book that covers modern c++ for people who know programming in another language.\n \n## Op Success!\n\n\n\n\n## Meeting Videos\n\n### Cohort 1\n\n<iframe src=\"https://www.youtube.com/embed/2JDeacWl1DM\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<iframe src=\"https://www.youtube.com/embed/sLWCelHpcqc\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 2\n\n<iframe src=\"https://www.youtube.com/embed/rQwOosOJpaY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 3\n\n<iframe src=\"https://www.youtube.com/embed/ZWdIeR1jK9Q\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 4\n\n<iframe src=\"https://www.youtube.com/embed/_K8DKF3Fzes\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 5\n\n<iframe src=\"https://www.youtube.com/embed/nske4iqsgh0\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n### Cohort 6\n\n<iframe src=\"https://www.youtube.com/embed/hyVK08jXiYw\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:10:13\tArthur Shaw:\tDid things freeze for anyone else?\n00:55:40\tFederica Gazzelloni:\thttps://en.cppreference.com/w/cpp/container\n00:57:44\tFederica Gazzelloni:\thttps://dirk.eddelbuettel.com/blog/2011/07/14/\n01:07:33\tTrevin:\tI don’t have experience\n01:07:54\tOluwafemi Oyedele:\tSame here!!!\n01:11:57\tArthur Shaw:\tDoes anyone know any packages that use C++? The one that comes to mind for me is haven, which uses a C++ library\n01:12:30\tTrevin:\tWhen I was looking, one that stood out to me was rstan\n01:13:02\tArthur Shaw:\tReacted to \"When I was looking, ...\" with 👍\n```\n</details>\n\n### Cohort 7\n\n<iframe src=\"https://www.youtube.com/embed/Luu7JsixQgY\" width=\"100%\" height=\"400px\" data-external=\"1\"></iframe>\n\n<details>\n\n<summary>Meeting chat log</summary>\n```\n00:43:02\tGus Lipkin:\tI think I found the definition for `mean`\n\nAn R call goes to *a which then calls the C function *b\n\n*a: https://github.com/wch/r-source/blob/trunk/src/library/base/R/mean.R\n*b: https://github.com/wch/r-source/blob/trunk/src/library/stats/src/cov.c#L207\n\nIt looks like the second pass only happens if `R_FINITE(mean_from_first_pass)` which tries to call `isfinite` from C++ and if it’s not there, it’ll make sure it is a number and is not positive or negative infinity.\n00:49:55\tGus Lipkin:\tI feel bad for dropping in on the last chapter and getting Collin’s thanks 😅 I wish I’d joined sooner.\n```\n</details>\n",
+ "supporting": [],
+ "filters": [
+ "rmarkdown/pagebreak.lua"
+ ],
+ "includes": {},
+ "engineDependencies": {},
+ "preserve": {},
+ "postProcess": true
+ }
+}
+\ No newline at end of file
diff --git a/_quarto.yml b/_quarto.yml
@@ -1,86 +1,10 @@
project:
type: website
-
-website:
- title: "Advanced R Book Club"
- sidebar:
- style: "docked"
- search: true
- tools:
- - icon: github
- href: https://github.com/r4ds/bookclub-advr
- - icon: youtube
- href: https://dslc.video/advr
- - icon: mastodon
- href: https://fosstodon.org/@DSLC
- - icon: linkedin
- href: https://www.linkedin.com/company/dslc-io
- contents:
- - index.qmd
- - file: slides/00-club_intro.qmd
- target: advr_club-slides
- - section: "Getting started"
- contents:
- - 01.qmd
- - section: "Foundations"
- contents:
- - 02.qmd
- - file: slides/03_Vectors.Rmd
- target: advr_club-slides
- - file: slides/04_Subsetting.Rmd
- target: advr_club-slides
- - file: slides/05_Control_flow.Rmd
- target: advr_club-slides
- - file: slides/06_Functions.Rmd
- target: advr_club-slides
- - file: slides/07_Environments.Rmd
- target: advr_club-slides
- - file: slides/08_Conditions.Rmd
- target: advr_club-slides
- - section: "Functional programming"
- contents:
- - file: slides/09_Functionals.Rmd
- target: advr_club-slides
- - file: slides/10_Function_factories.Rmd
- target: advr_club-slides
- - file: slides/11_Function_operators.Rmd
- target: advr_club-slides
- - section: "Object-oriented programming"
- contents:
- - file: slides/12_Base_types.Rmd
- target: advr_club-slides
- - file: slides/13_S3.Rmd
- target: advr_club-slides
- - file: slides/14_R6.Rmd
- target: advr_club-slides
- - file: slides/15_S4.Rmd
- target: advr_club-slides
- - file: slides/16_Trade-offs.Rmd
- target: advr_club-slides
- - section: "Metaprogramming"
- contents:
- - file: slides/17_Big_picture.Rmd
- target: advr_club-slides
- - file: slides/18_Expressions.Rmd
- target: advr_club-slides
- - file: slides/19_Quasiquotation.Rmd
- target: advr_club-slides
- - file: slides/20_Evaluation.Rmd
- target: advr_club-slides
- - file: slides/21_Translating_R_code.Rmd
- target: advr_club-slides
- - section: "Techniques"
- contents:
- - file: slides/22_Debugging.Rmd
- target: advr_club-slides
- - file: slides/23_Measuring_performance.Rmd
- target: advr_club-slides
- - file: slides/24_Improving_performance.Rmd
- target: advr_club-slides
- - file: slides/25_Rewriting_R_code_in_C++.Rmd
- target: advr_club-slides
-
-
+ pre-render: generate_chapters.R
+ render:
+ - slides/*
+ - videos/*
+ - '*.qmd'
format:
html:
theme:
@@ -89,3 +13,60 @@ format:
css: styles.css
toc: false
link-external-newwindow: true
+execute:
+ freeze: auto
+website:
+ title: Advanced R Book Club
+ sidebar:
+ style: docked
+ search: true
+ tools:
+ - icon: github
+ href: https://github.com/r4ds/bookclub-advr
+ - icon: youtube
+ href: https://dslc.video/advr
+ - icon: mastodon
+ href: https://fosstodon.org/@DSLC
+ - icon: linkedin
+ href: https://www.linkedin.com/company/dslc-io
+ contents:
+ - index.qmd
+ - file: slides/00.qmd
+ target: advr_club-slides
+ - section: Getting Started
+ contents:
+ - 01.qmd
+ - section: Foundations
+ contents:
+ - 02.qmd
+ - 03.qmd
+ - 04.qmd
+ - 05.qmd
+ - 06.qmd
+ - 07.qmd
+ - 08.qmd
+ - section: Functional programming
+ contents:
+ - 09.qmd
+ - 10.qmd
+ - 11.qmd
+ - section: Object-oriented programming
+ contents:
+ - 12.qmd
+ - 13.qmd
+ - 15.qmd
+ - 14.qmd
+ - 16.qmd
+ - section: Metaprogramming
+ contents:
+ - 17.qmd
+ - 18.qmd
+ - 19.qmd
+ - 20.qmd
+ - 21.qmd
+ - section: Techniques
+ contents:
+ - 22.qmd
+ - 23.qmd
+ - 24.qmd
+ - 25.qmd
diff --git a/generate_chapters.R b/generate_chapters.R
@@ -0,0 +1,77 @@
+# This script runs before the website renders, to generate chapter-index files.
+toc <- readr::read_csv("toc.csv", show_col_types = FALSE)
+header_template <- yaml::read_yaml("templates/_chapter_header.yml")
+quarto_index_path <- "_quarto.yml"
+quarto_index <- yaml::read_yaml(quarto_index_path)
+
+standard_parts <- list(
+ "index.qmd",
+ list(
+ file = "slides/00.qmd",
+ target = "advr_club-slides"
+ )
+)
+
+slide_files <- unclass(fs::dir_ls("slides", regexp = "[.](R|q)md$"))
+names(slide_files) <- fs::path_file(slide_files) |>
+ fs::path_ext_remove()
+slide_files <- slide_files[names(slide_files) != "00"]
+
+video_folders <- unclass(fs::dir_ls("videos", type = "directory"))
+names(video_folders) <- basename(video_folders)
+
+# Generate index files.
+purrr::iwalk(
+ slide_files,
+ \(path, number_wide) {
+ this_row <- toc[toc$number_wide == number_wide, ]
+ header <- header_template
+ header$title <- glue::glue_data(this_row, header$title)
+ header$listing[[1]]$contents <- path
+ qmd_body <- "{{< include templates/_slides.qmd >}}"
+ if (number_wide %in% names(video_folders)) {
+ header$listing[[2]]$contents <- video_folders[[number_wide]]
+ qmd_body <- paste(
+ qmd_body,
+ "{{< include templates/_videos.qmd >}}",
+ sep = "\n\n"
+ )
+ } else {
+ header$listing[[2]] <- NULL
+ }
+ qmd_contents <- paste(
+ "---",
+ yaml::as.yaml(header),
+ "---",
+ qmd_body,
+ sep = "\n"
+ )
+ cat(qmd_contents, file = glue::glue("{number_wide}.qmd"))
+ }
+)
+
+more_parts <- purrr::map(
+ unique(toc$part),
+ \(this_part) {
+ part_contents <- dplyr::filter(toc, .data$part == this_part) |>
+ dplyr::filter(.data$number_wide %in% names(slide_files)) |>
+ glue::glue_data("{number_wide}.qmd")
+ # Never inline contents.
+ if (length(part_contents) == 1) {
+ part_contents <- list(part_contents)
+ }
+ list(
+ section = this_part,
+ contents = part_contents
+ )
+ }
+)
+
+logical_handler <- function(x) {
+ to_return <- tolower(x)
+ class(to_return) <- "verbatim"
+ to_return
+}
+
+quarto_index$website$sidebar$contents <- c(standard_parts, more_parts)
+yaml::write_yaml(quarto_index, quarto_index_path, handlers = list(logical = logical_handler))
diff --git a/setup_toc.R b/setup_toc.R
@@ -0,0 +1,11 @@
+# Run this interactively as needed to update toc.csv. Should rarely be necessary.
+
+googlesheets4::read_sheet(
+ "1PgK1ZgOzKqIyxwS6iU_KF5LqBHrb0yx4GN0crVUAaUE",
+ range = "A2:C",
+ col_names = c("part", "number", "title"),
+ col_types = "c"
+) |>
+ dplyr::filter(!is.na(.data$part)) |>
+ dplyr::mutate(number_wide = stringr::str_pad(.data$number, 2, pad = "0")) |>
+ readr::write_csv("toc.csv")
diff --git a/slides/00-club_intro.qmd b/slides/00-club_intro.qmd
@@ -1,53 +0,0 @@
----
-engine: knitr
-title: Club Meetings
----
-
-# Welcome
-
-- Welcome to the Advanced R book club!
-- book: [adv-r.hadley.nz](https://adv-r.hadley.nz/)
-- These slides are available at [dslc.io/advr](https://dslc.io/advr).
-- We follow the [Data Science Learning Community Code of Conduct](https://dslc.io/code_of_conduct.html).
-
-::: notes
-- You can add notes on each slide with blocks like this!
-- Load a deck in the browser and type "s" to see these notes.
-:::
-
-## Book club meetings
-
-- Volunteer leads discussion of a chapter
- - **This is the best way to learn the material.**
-- Presentations:
- - Review of material
- - Questions you have
- - Maybe live demo
-- More info about editing: [this github repo](https://github.com/r4ds/bookclub-advr)
-- Ideally convert existing Rmd to qmd as we go
-- Recorded, available on the [Data Science Learning Community YouTube Channel (DSLC.video)](http://dslc.video)
-
-## Pace
-
-- **Goal:** 1 chapter/week
-- Ok to split overwhelming chapters
-- Ok to combine short chapters
-- Meet ***every*** week except holidays, etc
- - We will meet even if scheduled presenter unavailable
- - Push to finish before Daylight Savings Madness March 8
-
-## Learning objectives (LOs)
-
-- Students who study with LOs in mind ***retain more***
-- **Tips:**
- - Think "After today's session, you will be able to {LO}"
- - *Very* roughly **1 per heading**
-
-## Group introductions
-
-- If you feel comfortable sharing:
- - Who are you?
- - Where you calling in from? (If you're not comfortable sharing, skip)
- - How long have you been using R?
- - What was your introduction to R?
- - What are you most looking forward to during the club?
diff --git a/slides/00.qmd b/slides/00.qmd
@@ -0,0 +1,53 @@
+---
+engine: knitr
+title: Club meetings
+---
+
+# Welcome
+
+- Welcome to the Advanced R book club!
+- book: [adv-r.hadley.nz](https://adv-r.hadley.nz/)
+- These slides are available at [dslc.io/advr](https://dslc.io/advr).
+- We follow the [Data Science Learning Community Code of Conduct](https://dslc.io/code_of_conduct.html).
+
+::: notes
+- You can add notes on each slide with blocks like this!
+- Load a deck in the browser and type "s" to see these notes.
+:::
+
+## Book club meetings
+
+- Volunteer leads discussion of a chapter
+ - **This is the best way to learn the material.**
+- Presentations:
+ - Review of material
+ - Questions you have
+ - Maybe live demo
+- More info about editing: [this github repo](https://github.com/r4ds/bookclub-advr)
+- Ideally convert existing Rmd to qmd as we go
+- Recorded, available on the [Data Science Learning Community YouTube Channel (DSLC.video)](http://dslc.video)
+
+## Pace
+
+- **Goal:** 1 chapter/week
+- Ok to split overwhelming chapters
+- Ok to combine short chapters
+- Meet ***every*** week except holidays, etc
+ - We will meet even if scheduled presenter unavailable
+ - Push to finish before Daylight Savings Madness March 8
+
+## Learning objectives (LOs)
+
+- Students who study with LOs in mind ***retain more***
+- **Tips:**
+ - Think "After today's session, you will be able to {LO}"
+ - *Very* roughly **1 per heading**
+
+## Group introductions
+
+- If you feel comfortable sharing:
+ - Who are you?
+ - Where you calling in from? (If you're not comfortable sharing, skip)
+ - How long have you been using R?
+ - What was your introduction to R?
+ - What are you most looking forward to during the club?
diff --git a/slides/03.Rmd b/slides/03.Rmd
@@ -0,0 +1,2024 @@
+---
+engine: knitr
+title: Vectors
+---
+
+## Learning objectives:
+
+- Learn about different types of vectors and their attributes
+- Navigate through vector types and their value types
+- Venture into factors and date-time objects
+- Discuss the differences between data frames and tibbles
+- Do not get absorbed by the `NA` and `NULL` black hole
+
+```{r ch9_setup, message = FALSE, warning = FALSE}
+library("dplyr")
+library("gt")
+library("palmerpenguins")
+```
+
+
+<details>
+<summary>Session Info</summary>
+```{r}
+utils::sessionInfo()
+```
+</details>
+
+## Aperitif
+
+
+
+### Counting Penguins
+
+Consider this code to count the number of Gentoo penguins in the `penguins` data set. We see that there are 124 Gentoo penguins.
+
+```{r, eval = FALSE}
+sum("Gentoo" == penguins$species)
+# output: 124
+```
+
+### In
+
+One subtle error can arise in trying out `%in%` here instead.
+
+```{r, results = 'hide'}
+species_vector <- penguins |> select(species)
+print("Gentoo" %in% species_vector)
+# output: FALSE
+```
+
+
+
+### Fix: base R
+
+```{r, results = 'hide'}
+species_unlist <- penguins |> select(species) |> unlist()
+print("Gentoo" %in% species_unlist)
+# output: TRUE
+```
+
+### Fix: dplyr
+
+```{r, results = 'hide'}
+species_pull <- penguins |> select(species) |> pull()
+print("Gentoo" %in% species_pull)
+# output: TRUE
+```
+
+### Motivation
+
+* What are the different types of vectors?
+* How does this affect accessing vectors?
+
+<details>
+<summary>Side Quest: Looking up the `%in%` operator</summary>
+If you want to look up the manual pages for the `%in%` operator with the `?`, use backticks:
+
+```{r, eval = FALSE}
+?`%in%`
+```
+
+and we find that `%in%` is a wrapper for the `match()` function.
+
+</details>
+
+
+## Types of Vectors
+
+
+
+Two main types:
+
+- **Atomic**: Elements all the same type.
+- **List**: Elements are different Types.
+
+Closely related but not technically a vector:
+
+- **NULL**: Null elements. Often length zero.
+
+## Atomic Vectors
+
+### Types of atomic vectors
+
+
+
+- **Logical**: True/False
+- **Integer**: Numeric (discrete, no decimals)
+- **Double**: Numeric (continuous, decimals)
+- **Character**: String
+
+### Vectors of Length One
+
+**Scalars** are vectors that consist of a single value.
+
+#### Logicals
+
+```{r vec_lgl}
+lgl1 <- TRUE
+lgl2 <- T #abbreviation for TRUE
+lgl3 <- FALSE
+lgl4 <- F #abbreviation for FALSE
+```
+
+#### Doubles
+
+```{r vec_dbl}
+# integer, decimal, scientific, or hexidecimal format
+dbl1 <- 1
+dbl2 <- 1.234 # decimal
+dbl3 <- 1.234e0 # scientific format
+dbl4 <- 0xcafe # hexidecimal format
+```
+
+#### Integers
+
+Integers must be followed by L and cannot have fractional values
+
+```{r vec_int}
+int1 <- 1L
+int2 <- 1234L
+int3 <- 1234e0L
+int4 <- 0xcafeL
+```
+
+<details>
+<summary>Pop Quiz: Why "L" for integers?</summary>
+Wickham notes that the use of `L` dates back to the **C** programming language and its "long int" type for memory allocation.
+</details>
+
+#### Strings
+
+Strings can use single or double quotes and special characters are escaped with \
+
+```{r vec_str}
+str1 <- "hello" # double quotes
+str2 <- 'hello' # single quotes
+str3 <- "مرحبًا" # Unicode
+str4 <- "\U0001f605" # sweaty_smile
+```
+
+### Longer
+
+There are several ways to make longer vectors:
+
+**1. With single values** inside c() for combine.
+
+```{r long_single}
+lgl_var <- c(TRUE, FALSE)
+int_var <- c(1L, 6L, 10L)
+dbl_var <- c(1, 2.5, 4.5)
+chr_var <- c("these are", "some strings")
+```
+
+
+
+**2. With other vectors**
+
+```{r long_vec}
+c(c(1, 2), c(3, 4)) # output is not nested
+```
+
+<details>
+<summary>Side Quest: rlang</summary>
+
+`{rlang}` has [vector constructor functions too](https://rlang.r-lib.org/reference/vector-construction.html):
+
+- `rlang::lgl(...)`
+- `rlang::int(...)`
+- `rlang::dbl(...)`
+- `rlang::chr(...)`
+
+They look to do both more and less than `c()`.
+
+- More:
+ - Enforce type
+ - Splice lists
+ - More types: `rlang::bytes()`, `rlang::cpl(...)`
+- Less:
+ - Stricter rules on names
+
+Note: currently has `questioning` lifecycle badge, since these constructors may get moved to `vctrs`
+
+</details>
+
+### Type and Length
+
+We can determine the type of a vector with `typeof()` and its length with `length()`
+
+```{r type_length, echo = FALSE}
+# typeof(lgl_var)
+# typeof(int_var)
+# typeof(dbl_var)
+# typeof(chr_var)
+#
+# length(lgl_var)
+# length(int_var)
+# length(dbl_var)
+# length(chr_var)
+
+var_names <- c("lgl_var", "int_var", "dbl_var", "chr_var")
+var_values <- c("TRUE, FALSE", "1L, 6L, 10L", "1, 2.5, 4.5", "'these are', 'some strings'")
+var_type <- c("logical", "integer", "double", "character")
+var_length <- c(2, 3, 3, 2)
+
+type_length_df <- data.frame(var_names, var_values, var_type, var_length)
+
+# make gt table
+type_length_df |>
+ gt() |>
+ cols_align(align = "center") |>
+ cols_label(
+ var_names ~ "name",
+ var_values ~ "value",
+ var_type ~ "typeof()",
+ var_length ~ "length()"
+ ) |>
+ tab_header(
+ title = "Types of Atomic Vectors",
+ subtitle = ""
+ ) |>
+ tab_footnote(
+ footnote = "Source: https://adv-r.hadley.nz/index.html",
+ locations = cells_title(groups = "title")
+ ) |>
+ tab_style(
+ style = list(cell_fill(color = "#F9E3D6")),
+ locations = cells_body(columns = var_type)
+ ) |>
+ tab_style(
+ style = list(cell_fill(color = "lightcyan")),
+ locations = cells_body(columns = var_length)
+ )
+```
+
+<details>
+<summary>Side Quest: Penguins</summary>
+```{r}
+typeof(penguins$species)
+class(penguins$species)
+
+typeof(species_unlist)
+class(species_unlist)
+
+typeof(species_pull)
+class(species_pull)
+```
+
+</details>
+
+### Missing values
+
+#### Contagion
+
+For most computations, an operation over values that includes a missing value yields a missing value (unless you're careful)
+
+```{r na_contagion}
+# contagion
+5*NA
+sum(c(1, 2, NA, 3))
+```
+
+#### Exceptions
+
+```{r na_exceptions, eval = FALSE}
+NA ^ 0
+#> [1] 1
+NA | TRUE
+#> [1] TRUE
+NA & FALSE
+#> [1] FALSE
+```
+
+
+#### Innoculation
+
+```{r na_innoculation, eval = FALSE}
+sum(c(1, 2, NA, 3), na.rm = TRUE)
+# output: 6
+```
+
+To search for missing values use `is.na()`
+
+```{r na_search, eval = FALSE}
+x <- c(NA, 5, NA, 10)
+x == NA
+# output: NA NA NA NA [BATMAN!]
+```
+
+```{r na_search_better, eval = FALSE}
+is.na(x)
+# output: TRUE FALSE TRUE FALSE
+```
+
+<details>
+<summary>Side Quest: NA Types</summary>
+
+Each type has its own NA type
+
+- Logical: `NA`
+- Integer: `NA_integer`
+- Double: `NA_double`
+- Character: `NA_character`
+
+This may not matter in many contexts.
+
+But this does matter for operations where types matter like `dplyr::if_else()`.
+</details>
+
+
+### Testing
+
+**What type of vector `is.*`() it?**
+
+Test data type:
+
+- Logical: `is.logical()`
+- Integer: `is.integer()`
+- Double: `is.double()`
+- Character: `is.character()`
+
+**What type of object is it?**
+
+Don't test objects with these tools:
+
+- `is.vector()`
+- `is.atomic()`
+- `is.numeric()`
+
+They don’t test if you have a vector, atomic vector, or numeric vector; you’ll need to carefully read the documentation to figure out what they actually do (preview: *attributes*)
+
+<details>
+<summary>Side Quest: rlang</summary>
+
+Instead, maybe, use `{rlang}`
+
+- `rlang::is_vector`
+- `rlang::is_atomic`
+
+```{r test_rlang}
+# vector
+rlang::is_vector(c(1, 2))
+rlang::is_vector(list(1, 2))
+
+# atomic
+rlang::is_atomic(c(1, 2))
+rlang::is_atomic(list(1, "a"))
+
+```
+
+See more [here](https://rlang.r-lib.org/reference/type-predicates.html)
+</details>
+
+
+### Coercion
+
+* R follows rules for coercion: character → double → integer → logical
+
+* R can coerce either automatically or explicitly
+
+#### **Automatic**
+
+Two contexts for automatic coercion:
+
+1. Combination
+2. Mathematical
+
+##### Coercion by Combination:
+
+```{r coerce_c}
+str(c(TRUE, "TRUE"))
+```
+
+##### Coercion by Mathematical operations:
+
+```{r coerce_math}
+# imagine a logical vector about whether an attribute is present
+has_attribute <- c(TRUE, FALSE, TRUE, TRUE)
+
+# number with attribute
+sum(has_attribute)
+```
+
+#### **Explicit**
+
+<!--
+
+Use `as.*()`
+
+- Logical: `as.logical()`
+- Integer: `as.integer()`
+- Double: `as.double()`
+- Character: `as.character()`
+
+-->
+
+```{r explicit_coercion, echo = FALSE}
+# dbl_var
+# as.integer(dbl_var)
+# lgl_var
+# as.character(lgl_var)
+
+var_names <- c("lgl_var", "int_var", "dbl_var", "chr_var")
+var_values <- c("TRUE, FALSE", "1L, 6L, 10L", "1, 2.5, 4.5", "'these are', 'some strings'")
+as_logical <- c("TRUE FALSE", "TRUE TRUE TRUE", "TRUE TRUE TRUE", "NA NA")
+as_integer <- c("1 0", "1 6 10", "1 2 4", 'NA_integer')
+as_double <- c("1 0", "1 6 10", "1.0 2.5 4.5", 'NA_double')
+as_character <- c("'TRUE' 'FALSE'", "'1' '6' '10'", "'1' '2.5' '4.5'", "'these are', 'some strings'")
+
+coercion_df <- data.frame(var_names, var_values, as_logical, as_integer, as_double, as_character)
+
+coercion_df |>
+ gt() |>
+ cols_align(align = "center") |>
+ cols_label(
+ var_names ~ "name",
+ var_values ~ "value",
+ as_logical ~ "as.logical()",
+ as_integer ~ "as.integer()",
+ as_double ~ "as.double()",
+ as_character ~ "as.character()"
+ ) |>
+ tab_header(
+ title = "Coercion of Atomic Vectors",
+ subtitle = ""
+ ) |>
+ tab_footnote(
+ footnote = "Source: https://adv-r.hadley.nz/index.html",
+ locations = cells_title(groups = "title")
+ ) |>
+ tab_style(
+ style = list(cell_fill(color = "#F9E3D6")),
+ locations = cells_body(columns = c(as_logical, as_double))
+ ) |>
+ tab_style(
+ style = list(cell_fill(color = "lightcyan")),
+ locations = cells_body(columns = c(as_integer, as_character))
+ )
+```
+
+But note that coercion may fail in one of two ways, or both:
+
+- With warning/error
+- NAs
+
+```{r coerce_error}
+as.integer(c(1, 2, "three"))
+```
+
+### Exercises
+
+1. How do you create raw and complex scalars?
+
+<details><summary>Answer(s)</summary>
+```{r, eval = FALSE}
+as.raw(42)
+#> [1] 2a
+charToRaw("A")
+#> [1] 41
+complex(length.out = 1, real = 1, imaginary = 1)
+#> [1] 1+1i
+```
+</details>
+
+2. Test your knowledge of the vector coercion rules by predicting the output of the following uses of c():
+
+```{r, eval = FALSE}
+c(1, FALSE)
+c("a", 1)
+c(TRUE, 1L)
+```
+
+<details><summary>Answer(s)</summary>
+```{r, eval = FALSE}
+c(1, FALSE) # will be coerced to double -> 1 0
+c("a", 1) # will be coerced to character -> "a" "1"
+c(TRUE, 1L) # will be coerced to integer -> 1 1
+```
+</details>
+
+3. Why is `1 == "1"` true? Why is `-1 < FALSE` true? Why is `"one" < 2` false?
+
+<details><summary>Answer(s)</summary>
+These comparisons are carried out by operator-functions (==, <), which coerce their arguments to a common type. In the examples above, these types will be character, double and character: 1 will be coerced to "1", FALSE is represented as 0 and 2 turns into "2" (and numbers precede letters in lexicographic order (may depend on locale)).
+
+</details>
+
+4. Why is the default missing value, NA, a logical vector? What’s special about logical vectors?
+
+<details><summary>Answer(s)</summary>
+The presence of missing values shouldn’t affect the type of an object. Recall that there is a type-hierarchy for coercion from character → double → integer → logical. When combining `NA`s with other atomic types, the `NA`s will be coerced to integer (`NA_integer_`), double (`NA_real_`) or character (`NA_character_`) and not the other way round. If `NA` were a character and added to a set of other values all of these would be coerced to character as well.
+</details>
+
+5. Precisely what do `is.atomic()`, `is.numeric()`, and `is.vector()` test for?
+
+<details><summary>Answer(s)</summary>
+The documentation states that:
+
+* `is.atomic()` tests if an object is an atomic vector (as defined in *Advanced R*) or is `NULL` (!).
+* `is.numeric()` tests if an object has type integer or double and is not of class `factor`, `Date`, `POSIXt` or `difftime`.
+* `is.vector()` tests if an object is a vector (as defined in *Advanced R*) or an expression and has no attributes, apart from names.
+
+Atomic vectors are defined in *Advanced R* as objects of type logical, integer, double, complex, character or raw. Vectors are defined as atomic vectors or lists.
+</details>
+
+
+
+## Attributes
+
+Attributes are name-value pairs that attach metadata to an object(vector).
+
+* **Name-value pairs**: attributes have a name and a value
+* **Metadata**: not data itself, but data about the data
+
+### How?
+
+#### Getting and Setting
+
+Three functions:
+
+1. retrieve and modify single attributes with `attr()`
+2. retrieve en masse with `attributes()`
+3. set en masse with `structure()`
+
+**Single attribute**
+
+Use `attr()`
+
+```{r attr_single}
+# some object
+a <- c(1, 2, 3)
+
+# set attribute
+attr(x = a, which = "attribute_name") <- "some attribute"
+
+# get attribute
+attr(a, "attribute_name")
+```
+
+**Multiple attributes**
+
+To set multiple attributes, use `structure()` To get multiple attributes, use `attributes()`
+
+```{r attr_multiple_not_from_textbook, echo = FALSE}
+# b <- c(4, 5, 6)
+#
+# # set
+# b <- structure(
+# .Data = b,
+# attrib1_name = "first_attribute",
+# attrib2_name = "second_attribute"
+# )
+#
+# # get
+# attributes(b)
+# str(attributes(b))
+```
+
+
+```{r attr_multiple, eval = FALSE}
+a <- 1:3
+attr(a, "x") <- "abcdef"
+attr(a, "x")
+#> [1] "abcdef"
+
+attr(a, "y") <- 4:6
+str(attributes(a))
+#> List of 2
+#> $ x: chr "abcdef"
+#> $ y: int [1:3] 4 5 6
+
+# Or equivalently
+a <- structure(
+ 1:3,
+ x = "abcdef",
+ y = 4:6
+)
+str(attributes(a))
+#> List of 2
+#> $ x: chr "abcdef"
+#> $ y: int [1:3] 4 5 6
+```
+
+
+
+### Why
+
+Three particularly important attributes:
+
+1. **names** - a character vector giving each element a name
+2. **dimension** - (or dim) turns vectors into matrices and arrays
+3. **class** - powers the S3 object system (we'll learn more about this in chapter 13)
+
+Most attributes are lost by most operations. Only two attributes are routinely preserved: names and dimension.
+
+#### Names
+
+~~Three~~ Four ways to name:
+
+```{r names}
+# (1) When creating it:
+x <- c(A = 1, B = 2, C = 3)
+x
+
+# (2) By assigning a character vector to names()
+y <- 1:3
+names(y) <- c("a", "b", "c")
+y
+
+# (3) Inline, with setNames():
+z <- setNames(1:3, c("a", "b", "c"))
+z
+
+```
+
+
+
+```{r names_via_rlang}
+# (4) By setting names--with {rlang}
+a <- 1:3
+rlang::set_names(
+ x = a,
+ nm = c("a", "b", "c")
+)
+
+```
+
+
+
+* You can remove names from a vector by using `x <- unname(x)` or `names(x) <- NULL`.
+* Thematically but not directly related: labelled class vectors with `haven::labelled()`
+
+
+#### Dimensions
+
+Create matrices and arrays with `matrix()` and `array()`, or by using the assignment form of `dim()`:
+
+```{r dimensions}
+# Two scalar arguments specify row and column sizes
+x <- matrix(1:6, nrow = 2, ncol = 3)
+x
+
+# One vector argument to describe all dimensions
+y <- array(1:24, c(2, 3, 4)) # rows, columns, no of arrays
+y
+
+# You can also modify an object in place by setting dim()
+z <- 1:6
+dim(z) <- c(2, 3) # rows, columns
+z
+
+a <- 1:24
+dim(a) <- c(2, 3, 4) # rows, columns, no of arrays
+a
+```
+
+##### Functions for working with vectors, matrices and arrays:
+
+Vector | Matrix | Array
+:----- | :---------- | :-----
+`names()` | `rownames()`, `colnames()` | `dimnames()`
+`length()` | `nrow()`, `ncol()` | `dim()`
+`c()` | `rbind()`, `cbind()` | `abind::abind()`
+— | `t()` | `aperm()`
+`is.null(dim(x))` | `is.matrix()` | `is.array()`
+
+* **Caution**: A vector without a `dim` attribute set is often thought of as 1-dimensional, but actually has `NULL` dimensions.
+* One dimension?
+
+```{r examples_of_1D, eval = FALSE}
+str(1:3) # 1d vector
+#> int [1:3] 1 2 3
+str(matrix(1:3, ncol = 1)) # column vector
+#> int [1:3, 1] 1 2 3
+str(matrix(1:3, nrow = 1)) # row vector
+#> int [1, 1:3] 1 2 3
+str(array(1:3, 3)) # "array" vector
+#> int [1:3(1d)] 1 2 3
+```
+
+
+### Exercises
+
+1. How is `setNames()` implemented? How is `unname()` implemented? Read the source code.
+
+<details><summary>Answer(s)</summary>
+`setNames()` is implemented as:
+
+```{r, eval = FALSE}
+setNames <- function(object = nm, nm) {
+ names(object) <- nm
+ object
+}
+```
+
+Because the data argument comes first, `setNames()` also works well with the magrittr-pipe operator. When no first argument is given, the result is a named vector (this is rather untypical as required arguments usually come first):
+
+```{r, eval = FALSE}
+setNames( , c("a", "b", "c"))
+#> a b c
+#> "a" "b" "c"
+```
+
+`unname()` is implemented in the following way:
+
+```{r, eval = FALSE}
+unname <- function(obj, force = FALSE) {
+ if (!is.null(names(obj)))
+ names(obj) <- NULL
+ if (!is.null(dimnames(obj)) && (force || !is.data.frame(obj)))
+ dimnames(obj) <- NULL
+ obj
+}
+```
+
+`unname()` removes existing names (or dimnames) by setting them to `NULL`.
+</details>
+
+2. What does `dim()` return when applied to a 1-dimensional vector? When might you use `NROW()` or `NCOL()`?
+
+<details><summary>Answer(s)</summary>
+
+> dim() will return NULL when applied to a 1d vector.
+
+One may want to use `NROW()` or `NCOL()` to handle atomic vectors, lists and NULL values in the same way as one column matrices or data frames. For these objects `nrow()` and `ncol()` return NULL:
+
+```{r, eval = FALSE}
+x <- 1:10
+
+# Return NULL
+nrow(x)
+#> NULL
+ncol(x)
+#> NULL
+
+# Pretend it's a column vector
+NROW(x)
+#> [1] 10
+NCOL(x)
+#> [1] 1
+```
+
+</details>
+
+3. How would you describe the following three objects? What makes them different from `1:5`?
+
+```{r}
+x1 <- array(1:5, c(1, 1, 5))
+x2 <- array(1:5, c(1, 5, 1))
+x3 <- array(1:5, c(5, 1, 1))
+```
+
+<details><summary>Answer(s)</summary>
+```{r, eval = FALSE}
+x1 <- array(1:5, c(1, 1, 5)) # 1 row, 1 column, 5 in third dim.
+x2 <- array(1:5, c(1, 5, 1)) # 1 row, 5 columns, 1 in third dim.
+x3 <- array(1:5, c(5, 1, 1)) # 5 rows, 1 column, 1 in third dim.
+```
+</details>
+
+
+4. An early draft used this code to illustrate `structure()`:
+
+```{r, eval = FALSE}
+structure(1:5, comment = "my attribute")
+#> [1] 1 2 3 4 5
+```
+
+But when you print that object you don’t see the comment attribute. Why? Is the attribute missing, or is there something else special about it?
+
+<details><summary>Answer(s)</summary>
+The documentation states (see `?comment`):
+
+> Contrary to other attributes, the comment is not printed (by print or print.default).
+
+Also, from `?attributes:`
+
+> Note that some attributes (namely class, comment, dim, dimnames, names, row.names and tsp) are treated specially and have restrictions on the values which can be set.
+
+We can retrieve comment attributes by calling them explicitly:
+
+```{r, eval = FALSE}
+foo <- structure(1:5, comment = "my attribute")
+
+attributes(foo)
+#> $comment
+#> [1] "my attribute"
+attr(foo, which = "comment")
+#> [1] "my attribute"
+```
+
+</details>
+
+
+
+## **Class** - S3 atomic vectors
+
+
+
+Credit: [Advanced R](https://adv-r.hadley.nz/index.html) by Hadley Wickham
+
+**Having a class attribute turns an object into an S3 object.**
+
+What makes S3 atomic vectors different?
+
+1. behave differently from a regular vector when passed to a generic function
+2. often store additional information in other attributes
+
+Four important S3 vectors used in base R:
+
+1. **Factors** (categorical data)
+2. **Dates**
+3. **Date-times** (POSIXct)
+4. **Durations** (difftime)
+
+### Factors
+
+A factor is a vector used to store categorical data that can contain only predefined values.
+
+Factors are integer vectors with:
+
+- Class: "factor"
+- Attributes: "levels", or the set of allowed values
+
+```{r factor}
+colors = c('red', 'blue', 'green','red','red', 'green')
+# Build a factor
+a_factor <- factor(
+ # values
+ x = colors,
+ # exhaustive list of values
+ levels = c('red', 'blue', 'green', 'yellow')
+)
+```
+
+```{r factor_table}
+# Useful when some possible values are not present in the data
+table(colors)
+table(a_factor)
+
+# - type
+typeof(a_factor)
+class(a_factor)
+
+# - attributes
+attributes(a_factor)
+```
+
+#### Custom Order
+
+Factors can be ordered. This can be useful for models or visualizations where order matters.
+
+```{r factor_ordered}
+
+values <- c('high', 'med', 'low', 'med', 'high', 'low', 'med', 'high')
+
+ordered_factor <- ordered(
+ # values
+ x = values,
+ # levels in ascending order
+ levels = c('low', 'med', 'high')
+)
+
+# Inspect
+ordered_factor
+
+table(values)
+table(ordered_factor)
+```
+
+### Dates
+
+Dates are:
+
+- Double vectors
+- With class "Date"
+- No other attributes
+
+```{r dates}
+notes_date <- Sys.Date()
+
+# type
+typeof(notes_date)
+
+# class
+attributes(notes_date)
+```
+
+The double component represents the number of days since since the [Unix epoch](https://en.wikipedia.org/wiki/Unix_time) `1970-01-01`
+
+```{r days_since_1970}
+date <- as.Date("1970-02-01")
+unclass(date)
+```
+
+### Date-times
+
+There are 2 Date-time representations in base R:
+
+- POSIXct, where "ct" denotes *calendar time*
+- POSIXlt, where "lt" designates *local time*
+
+<!--
+
+Just for fun:
+"How to pronounce 'POSIXct'?"
+https://www.howtopronounce.com/posixct
+
+-->
+
+We'll focus on POSIXct because:
+
+- Simplest
+- Built on an atomic (double) vector
+- Most appropriate for use in a data frame
+
+Let's now build and deconstruct a Date-time
+
+```{r date_time}
+# Build
+note_date_time <- as.POSIXct(
+ x = Sys.time(), # time
+ tz = "America/New_York" # time zone, used only for formatting
+)
+
+# Inspect
+note_date_time
+
+# - type
+typeof(note_date_time)
+
+# - attributes
+attributes(note_date_time)
+
+structure(note_date_time, tzone = "Europe/Paris")
+```
+
+```{r date_time_format}
+date_time <- as.POSIXct("2024-02-22 12:34:56", tz = "EST")
+unclass(date_time)
+```
+
+
+### Durations
+
+Durations represent the amount of time between pairs of dates or date-times.
+
+- Double vectors
+- Class: "difftime"
+- Attributes: "units", or the unit of duration (e.g., weeks, hours, minutes, seconds, etc.)
+
+```{r durations}
+# Construct
+one_minute <- as.difftime(1, units = "mins")
+# Inspect
+one_minute
+
+# Dissect
+# - type
+typeof(one_minute)
+# - attributes
+attributes(one_minute)
+```
+
+```{r durations_math}
+time_since_01_01_1970 <- notes_date - date
+time_since_01_01_1970
+```
+
+
+See also:
+
+- [`lubridate::make_difftime()`](https://lubridate.tidyverse.org/reference/make_difftime.html)
+- [`clock::date_time_build()`](https://clock.r-lib.org/reference/date_time_build.html)
+
+
+### Exercises
+
+1. What sort of object does `table()` return? What is its type? What attributes does it have? How does the dimensionality change as you tabulate more variables?
+
+<details><summary>Answer(s)</summary>
+
+`table()` returns a contingency table of its input variables. It is implemented as an integer vector with class table and dimensions (which makes it act like an array). Its attributes are dim (dimensions) and dimnames (one name for each input column). The dimensions correspond to the number of unique values (factor levels) in each input variable.
+
+```{r, eval = FALSE}
+x <- table(mtcars[c("vs", "cyl", "am")])
+
+typeof(x)
+#> [1] "integer"
+attributes(x)
+#> $dim
+#> [1] 2 3 2
+#>
+#> $dimnames
+#> $dimnames$vs
+#> [1] "0" "1"
+#>
+#> $dimnames$cyl
+#> [1] "4" "6" "8"
+#>
+#> $dimnames$am
+#> [1] "0" "1"
+#>
+#>
+#> $class
+#> [1] "table"
+```
+</details>
+
+2. What happens to a factor when you modify its levels?
+
+```{r, eval = FALSE}
+f1 <- factor(letters)
+levels(f1) <- rev(levels(f1))
+```
+
+<details><summary>Answer(s)</summary>
+The underlying integer values stay the same, but the levels are changed, making it look like the data has changed.
+
+```{r, eval = FALSE}
+f1 <- factor(letters)
+f1
+#> [1] a b c d e f g h i j k l m n o p q r s t u v w x y z
+#> Levels: a b c d e f g h i j k l m n o p q r s t u v w x y z
+as.integer(f1)
+#> [1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
+#> [26] 26
+
+levels(f1) <- rev(levels(f1))
+f1
+#> [1] z y x w v u t s r q p o n m l k j i h g f e d c b a
+#> Levels: z y x w v u t s r q p o n m l k j i h g f e d c b a
+as.integer(f1)
+#> [1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
+#> [26] 26
+```
+</details>
+
+3. What does this code do? How do `f2` and `f3` differ from `f1`?
+
+```{r, eval = FALSE}
+f2 <- rev(factor(letters))
+f3 <- factor(letters, levels = rev(letters))
+```
+
+<details><summary>Answer(s)</summary>
+For `f2` and `f3` either the order of the factor elements or its levels are being reversed. For `f1` both transformations are occurring.
+
+```{r, eval = FALSE}
+# Reverse element order
+(f2 <- rev(factor(letters)))
+#> [1] z y x w v u t s r q p o n m l k j i h g f e d c b a
+#> Levels: a b c d e f g h i j k l m n o p q r s t u v w x y z
+as.integer(f2)
+#> [1] 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2
+#> [26] 1
+
+# Reverse factor levels (when creating factor)
+(f3 <- factor(letters, levels = rev(letters)))
+#> [1] a b c d e f g h i j k l m n o p q r s t u v w x y z
+#> Levels: z y x w v u t s r q p o n m l k j i h g f e d c b a
+as.integer(f3)
+#> [1] 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2
+#> [26] 1
+```
+</details>
+
+
+
+
+
+
+## Lists
+
+* sometimes called a generic vector or recursive vector
+* Recall ([section 2.3.3](https://adv-r.hadley.nz/names-values.html#list-references)): each element is really a *reference* to another object
+* an be composed of elements of different types (as opposed to atomic vectors which must be of only one type)
+
+### Constructing
+
+Simple lists:
+
+```{r list_simple}
+# Construct
+simple_list <- list(
+ c(TRUE, FALSE), # logicals
+ 1:20, # integers
+ c(1.2, 2.3, 3.4), # doubles
+ c("primo", "secundo", "tercio") # characters
+)
+
+simple_list
+
+# Inspect
+# - type
+typeof(simple_list)
+# - structure
+str(simple_list)
+
+# Accessing
+simple_list[1]
+simple_list[2]
+simple_list[3]
+simple_list[4]
+
+simple_list[[1]][2]
+simple_list[[2]][8]
+simple_list[[3]][2]
+simple_list[[4]][3]
+```
+
+Even Simpler List
+
+```{r list_simpler}
+# Construct
+simpler_list <- list(TRUE, FALSE,
+ 1, 2, 3, 4, 5,
+ 1.2, 2.3, 3.4,
+ "primo", "secundo", "tercio")
+
+# Accessing
+simpler_list[1]
+simpler_list[5]
+simpler_list[9]
+simpler_list[11]
+```
+
+Nested lists:
+
+```{r list_nested}
+nested_list <- list(
+ # first level
+ list(
+ # second level
+ list(
+ # third level
+ list(1)
+ )
+ )
+)
+
+str(nested_list)
+```
+
+Like JSON.
+
+Combined lists
+
+```{r list_combined}
+# with list()
+list_comb1 <- list(list(1, 2), list(3, 4))
+# with c()
+list_comb2 <- c(list(1, 2), list(3, 4))
+
+# compare structure
+str(list_comb1)
+str(list_comb2)
+
+# does this work if they are different data types?
+list_comb3 <- c(list(1, 2), list(TRUE, FALSE))
+str(list_comb3)
+```
+
+### Testing
+
+Check that is a list:
+
+- `is.list()`
+- \`rlang::is_list()\`\`
+
+The two do the same, except that the latter can check for the number of elements
+
+```{r list_test}
+# is list
+base::is.list(list_comb2)
+rlang::is_list(list_comb2)
+
+# is list of 4 elements
+rlang::is_list(x = list_comb2, n = 4)
+
+# is a vector (of a special type)
+# remember the family tree?
+rlang::is_vector(list_comb2)
+```
+
+### Coercion
+
+Use `as.list()`
+
+```{r list_coercion}
+list(1:3)
+as.list(1:3)
+```
+
+### Matrices and arrays
+
+Although not often used, the dimension attribute can be added to create **list-matrices** or **list-arrays**.
+
+```{r list_matrices_arrays}
+l <- list(1:3, "a", TRUE, 1.0)
+dim(l) <- c(2, 2)
+l
+
+l[[1, 1]]
+```
+
+
+### Exercises
+
+1. List all the ways that a list differs from an atomic vector.
+
+<details><summary>Answer(s)</summary>
+
+* Atomic vectors are always homogeneous (all elements must be of the same type). Lists may be heterogeneous (the elements can be of different types) as described in the introduction of the vectors chapter.
+* Atomic vectors point to one address in memory, while lists contain a separate reference for each element. (This was described in the list sections of the vectors and the names and values chapters.)
+
+```{r, eval = FALSE}
+lobstr::ref(1:2)
+#> [1:0x7fcd936f6e80] <int>
+lobstr::ref(list(1:2, 2))
+#> █ [1:0x7fcd93d53048] <list>
+#> ├─[2:0x7fcd91377e40] <int>
+#> └─[3:0x7fcd93b41eb0] <dbl>
+```
+
+
+* Subsetting with out-of-bounds and NA values leads to different output. For example, [ returns NA for atomics and NULL for lists. (This is described in more detail within the subsetting chapter.)
+
+```{r, eval = FALSE}
+# Subsetting atomic vectors
+(1:2)[3]
+#> [1] NA
+(1:2)[NA]
+#> [1] NA NA
+
+# Subsetting lists
+as.list(1:2)[3]
+#> [[1]]
+#> NULL
+as.list(1:2)[NA]
+#> [[1]]
+#> NULL
+#>
+#> [[2]]
+#> NULL
+```
+
+
+</details>
+
+2. Why do you need to use `unlist()` to convert a list to an atomic vector? Why doesn’t `as.vector()` work?
+
+<details><summary>Answer(s)</summary>
+A list is already a vector, though not an atomic one! Note that as.vector() and is.vector() use different definitions of “vector!”
+
+```{r, eval = FALSE}
+is.vector(as.vector(mtcars))
+#> [1] FALSE
+```
+
+</details>
+
+3. Compare and contrast `c()` and `unlist()` when combining a date and date-time into a single vector.
+
+<details><summary>Answer(s)</summary>
+Date and date-time objects are both built upon doubles. While dates store the number of days since the reference date 1970-01-01 (also known as “the Epoch”) in days, date-time-objects (POSIXct) store the time difference to this date in seconds.
+
+```{r, eval = FALSE}
+date <- as.Date("1970-01-02")
+dttm_ct <- as.POSIXct("1970-01-01 01:00", tz = "UTC")
+
+# Internal representations
+unclass(date)
+#> [1] 1
+unclass(dttm_ct)
+#> [1] 3600
+#> attr(,"tzone")
+#> [1] "UTC"
+```
+
+As the c() generic only dispatches on its first argument, combining date and date-time objects via c() could lead to surprising results in older R versions (pre R 4.0.0):
+
+```{r, eval = FALSE}
+# Output in R version 3.6.2
+c(date, dttm_ct) # equal to c.Date(date, dttm_ct)
+#> [1] "1970-01-02" "1979-11-10"
+c(dttm_ct, date) # equal to c.POSIXct(date, dttm_ct)
+#> [1] "1970-01-01 02:00:00 CET" "1970-01-01 01:00:01 CET"
+```
+
+In the first statement above c.Date() is executed, which incorrectly treats the underlying double of dttm_ct (3600) as days instead of seconds. Conversely, when c.POSIXct() is called on a date, one day is counted as one second only.
+
+We can highlight these mechanics by the following code:
+
+```{r, eval = FALSE}
+# Output in R version 3.6.2
+unclass(c(date, dttm_ct)) # internal representation
+#> [1] 1 3600
+date + 3599
+#> "1979-11-10"
+```
+
+As of R 4.0.0 these issues have been resolved and both methods now convert their input first into POSIXct and Date, respectively.
+
+```{r, eval = FALSE}
+c(dttm_ct, date)
+#> [1] "1970-01-01 01:00:00 UTC" "1970-01-02 00:00:00 UTC"
+unclass(c(dttm_ct, date))
+#> [1] 3600 86400
+
+c(date, dttm_ct)
+#> [1] "1970-01-02" "1970-01-01"
+unclass(c(date, dttm_ct))
+#> [1] 1 0
+```
+
+However, as c() strips the time zone (and other attributes) of POSIXct objects, some caution is still recommended.
+
+```{r, eval = FALSE}
+(dttm_ct <- as.POSIXct("1970-01-01 01:00", tz = "HST"))
+#> [1] "1970-01-01 01:00:00 HST"
+attributes(c(dttm_ct))
+#> $class
+#> [1] "POSIXct" "POSIXt"
+```
+
+A package that deals with these kinds of problems in more depth and provides a structural solution for them is the {vctrs} package9 which is also used throughout the tidyverse.10
+
+Let’s look at unlist(), which operates on list input.
+
+```{r, eval = FALSE}
+# Attributes are stripped
+unlist(list(date, dttm_ct))
+#> [1] 1 39600
+```
+
+We see again that dates and date-times are internally stored as doubles. Unfortunately, this is all we are left with, when unlist strips the attributes of the list.
+
+To summarise: c() coerces types and strips time zones. Errors may have occurred in older R versions because of inappropriate method dispatch/immature methods. unlist() strips attributes.
+</details>
+
+
+
+## Data frames and tibbles
+
+
+
+Credit: [Advanced R](https://adv-r.hadley.nz/index.html) by Hadley Wickham
+
+### Data frame
+
+A data frame is a:
+
+- Named list of vectors (i.e., column names)
+- Attributes:
+ - (column) `names`
+ - `row.names`
+ - Class: "data frame"
+
+```{r data_frame}
+# Construct
+df <- data.frame(
+ col1 = c(1, 2, 3), # named atomic vector
+ col2 = c("un", "deux", "trois") # another named atomic vector
+ # ,stringsAsFactors = FALSE # default for versions after R 4.1
+)
+
+# Inspect
+df
+
+# Deconstruct
+# - type
+typeof(df)
+# - attributes
+attributes(df)
+```
+
+```{r df_functions}
+rownames(df)
+colnames(df)
+names(df) # Same as colnames(df)
+
+nrow(df)
+ncol(df)
+length(df) # Same as ncol(df)
+```
+
+Unlike other lists, the length of each vector must be the same (i.e. as many vector elements as rows in the data frame).
+
+### Tibble
+
+Created to relieve some of the frustrations and pain points created by data frames, tibbles are data frames that are:
+
+- Lazy (do less)
+- Surly (complain more)
+
+#### Lazy
+
+Tibbles do not:
+
+- Coerce strings
+- Transform non-syntactic names
+- Recycle vectors of length greater than 1
+
+**Coerce strings**
+
+```{r tbl_no_coerce}
+chr_col <- c("don't", "factor", "me", "bro")
+
+# data frame
+df <- data.frame(
+ a = chr_col,
+ # in R 4.1 and earlier, this was the default
+ stringsAsFactors = TRUE
+)
+
+# tibble
+tbl <- tibble::tibble(
+ a = chr_col
+)
+
+# contrast the structure
+str(df$a)
+str(tbl$a)
+
+```
+
+**Transform non-syntactic names**
+
+```{r tbl_col_name}
+# data frame
+df <- data.frame(
+ `1` = c(1, 2, 3)
+)
+
+# tibble
+tbl <- tibble::tibble(
+ `1` = c(1, 2, 3)
+)
+
+# contrast the names
+names(df)
+names(tbl)
+```
+
+**Recycle vectors of length greater than 1**
+
+```{r tbl_recycle, error=TRUE}
+# data frame
+df <- data.frame(
+ col1 = c(1, 2, 3, 4),
+ col2 = c(1, 2)
+)
+
+# tibble
+tbl <- tibble::tibble(
+ col1 = c(1, 2, 3, 4),
+ col2 = c(1, 2)
+)
+```
+
+#### Surly
+
+Tibbles do only what they're asked and complain if what they're asked doesn't make sense:
+
+- Subsetting always yields a tibble
+- Complains if cannot find column
+
+**Subsetting always yields a tibble**
+
+```{r tbl_subset}
+# data frame
+df <- data.frame(
+ col1 = c(1, 2, 3, 4)
+)
+
+# tibble
+tbl <- tibble::tibble(
+ col1 = c(1, 2, 3, 4)
+)
+
+# contrast
+df_col <- df[, "col1"]
+str(df_col)
+tbl_col <- tbl[, "col1"]
+str(tbl_col)
+
+# to select a vector, do one of these instead
+tbl_col_1 <- tbl[["col1"]]
+str(tbl_col_1)
+tbl_col_2 <- dplyr::pull(tbl, col1)
+str(tbl_col_2)
+```
+
+**Complains if cannot find column**
+
+```{r tbl_col_match, warning=TRUE}
+names(df)
+df$col
+
+names(tbl)
+tbl$col
+```
+
+#### One more difference
+
+**`tibble()` allows you to refer to variables created during construction**
+
+```{r df_tibble_diff}
+tibble::tibble(
+ x = 1:3,
+ y = x * 2 # x refers to the line above
+)
+```
+
+<details>
+<summary>Side Quest: Row Names</summary>
+
+- character vector containing only unique values
+- get and set with `rownames()`
+- can use them to subset rows
+
+```{r row_names}
+df3 <- data.frame(
+ age = c(35, 27, 18),
+ hair = c("blond", "brown", "black"),
+ row.names = c("Bob", "Susan", "Sam")
+)
+df3
+
+rownames(df3)
+df3["Bob", ]
+
+rownames(df3) <- c("Susan", "Bob", "Sam")
+rownames(df3)
+df3["Bob", ]
+```
+
+There are three reasons why row names are undesirable:
+
+3. Metadata is data, so storing it in a different way to the rest of the data is fundamentally a bad idea.
+2. Row names are a poor abstraction for labelling rows because they only work when a row can be identified by a single string. This fails in many cases.
+3. Row names must be unique, so any duplication of rows (e.g. from bootstrapping) will create new row names.
+
+</details>
+
+
+### Printing
+
+Data frames and tibbles print differently
+
+```{r df_tibble_print}
+df3
+tibble::as_tibble(df3)
+```
+
+
+### Subsetting
+
+Two undesirable subsetting behaviours:
+
+1. When you subset columns with `df[, vars]`, you will get a vector if vars selects one variable, otherwise you’ll get a data frame, unless you always remember to use `df[, vars, drop = FALSE]`.
+2. When you attempt to extract a single column with `df$x` and there is no column `x`, a data frame will instead select any variable that starts with `x`. If no variable starts with `x`, `df$x` will return NULL.
+
+Tibbles tweak these behaviours so that a [ always returns a tibble, and a $ doesn’t do partial matching and warns if it can’t find a variable (*this is what makes tibbles surly*).
+
+### Testing
+
+Whether data frame: `is.data.frame()`. Note: both data frame and tibble are data frames.
+
+Whether tibble: `tibble::is_tibble`. Note: only tibbles are tibbles. Vanilla data frames are not.
+
+### Coercion
+
+- To data frame: `as.data.frame()`
+- To tibble: `tibble::as_tibble()`
+
+### List Columns
+
+List-columns are allowed in data frames but you have to do a little extra work by either adding the list-column after creation or wrapping the list in `I()`
+
+```{r list_columns}
+df4 <- data.frame(x = 1:3)
+df4$y <- list(1:2, 1:3, 1:4)
+df4
+
+df5 <- data.frame(
+ x = 1:3,
+ y = I(list(1:2, 1:3, 1:4))
+)
+df5
+```
+
+### Matrix and data frame columns
+
+- As long as the number of rows matches the data frame, it’s also possible to have a matrix or data frame as a column of a data frame.
+- same as list-columns, must either addi the list-column after creation or wrapping the list in `I()`
+
+```{r matrix_df_columns}
+dfm <- data.frame(
+ x = 1:3 * 10,
+ y = I(matrix(1:9, nrow = 3))
+)
+
+dfm$z <- data.frame(a = 3:1, b = letters[1:3], stringsAsFactors = FALSE)
+
+str(dfm)
+dfm$y
+dfm$z
+```
+
+
+### Exercises
+
+1. Can you have a data frame with zero rows? What about zero columns?
+
+<details><summary>Answer(s)</summary>
+Yes, you can create these data frames easily; either during creation or via subsetting. Even both dimensions can be zero. Create a 0-row, 0-column, or an empty data frame directly:
+
+```{r, eval = FALSE}
+data.frame(a = integer(), b = logical())
+#> [1] a b
+#> <0 rows> (or 0-length row.names)
+
+data.frame(row.names = 1:3) # or data.frame()[1:3, ]
+#> data frame with 0 columns and 3 rows
+
+data.frame()
+#> data frame with 0 columns and 0 rows
+```
+
+Create similar data frames via subsetting the respective dimension with either 0, `NULL`, `FALSE` or a valid 0-length atomic (`logical(0)`, `character(0)`, `integer(0)`, `double(0)`). Negative integer sequences would also work. The following example uses a zero:
+
+```{r, eval = FALSE}
+mtcars[0, ]
+#> [1] mpg cyl disp hp drat wt qsec vs am gear carb
+#> <0 rows> (or 0-length row.names)
+
+mtcars[ , 0] # or mtcars[0]
+#> data frame with 0 columns and 32 rows
+
+mtcars[0, 0]
+#> data frame with 0 columns and 0 rows
+```
+
+
+</details>
+
+2. What happens if you attempt to set rownames that are not unique?
+
+<details><summary>Answer(s)</summary>
+Matrices can have duplicated row names, so this does not cause problems.
+
+Data frames, however, require unique rownames and you get different results depending on how you attempt to set them. If you set them directly or via `row.names()`, you get an error:
+
+```{r, eval = FALSE}
+data.frame(row.names = c("x", "y", "y"))
+#> Error in data.frame(row.names = c("x", "y", "y")): duplicate row.names: y
+
+df <- data.frame(x = 1:3)
+row.names(df) <- c("x", "y", "y")
+#> Warning: non-unique value when setting 'row.names': 'y'
+#> Error in `.rowNamesDF<-`(x, value = value): duplicate 'row.names' are not allowed
+```
+
+If you use subsetting, `[` automatically deduplicates:
+
+```{r, eval = FALSE}
+row.names(df) <- c("x", "y", "z")
+df[c(1, 1, 1), , drop = FALSE]
+#> x
+#> x 1
+#> x.1 1
+#> x.2 1
+```
+
+</details>
+
+3. If `df` is a data frame, what can you say about `t(df)`, and `t(t(df))`? Perform some experiments, making sure to try different column types.
+
+<details><summary>Answer(s)</summary>
+Both of `t(df)` and `t(t(df))` will return matrices:
+
+```{r, eval = FALSE}
+df <- data.frame(x = 1:3, y = letters[1:3])
+is.matrix(df)
+#> [1] FALSE
+is.matrix(t(df))
+#> [1] TRUE
+is.matrix(t(t(df)))
+#> [1] TRUE
+```
+
+The dimensions will respect the typical transposition rules:
+
+```{r, eval = FALSE}
+dim(df)
+#> [1] 3 2
+dim(t(df))
+#> [1] 2 3
+dim(t(t(df)))
+#> [1] 3 2
+```
+
+Because the output is a matrix, every column is coerced to the same type. (It is implemented within `t.data.frame()` via `as.matrix()` which is described below).
+
+```{r, eval = FALSE}
+df
+#> x y
+#> 1 1 a
+#> 2 2 b
+#> 3 3 c
+t(df)
+#> [,1] [,2] [,3]
+#> x "1" "2" "3"
+#> y "a" "b" "c"
+```
+
+</details>
+
+4. What does `as.matrix()` do when applied to a data frame with columns of different types? How does it differ from `data.matrix()`?
+
+<details><summary>Answer(s)</summary>
+The type of the result of as.matrix depends on the types of the input columns (see `?as.matrix`):
+
+> The method for data frames will return a character matrix if there is only atomic columns and any non-(numeric/logical/complex) column, applying as.vector to factors and format to other non-character columns. Otherwise the usual coercion hierarchy (logical < integer < double < complex) will be used, e.g. all-logical data frames will be coerced to a logical matrix, mixed logical-integer will give an integer matrix, etc.
+
+On the other hand, `data.matrix` will always return a numeric matrix (see `?data.matrix()`).
+
+> Return the matrix obtained by converting all the variables in a data frame to numeric mode and then binding them together as the columns of a matrix. Factors and ordered factors are replaced by their internal codes. […] Character columns are first converted to factors and then to integers.
+
+We can illustrate and compare the mechanics of these functions using a concrete example. `as.matrix()` makes it possible to retrieve most of the original information from the data frame but leaves us with characters. To retrieve all information from `data.matrix()`’s output, we would need a lookup table for each column.
+
+```{r, eval = FALSE}
+df_coltypes <- data.frame(
+ a = c("a", "b"),
+ b = c(TRUE, FALSE),
+ c = c(1L, 0L),
+ d = c(1.5, 2),
+ e = factor(c("f1", "f2"))
+)
+
+as.matrix(df_coltypes)
+#> a b c d e
+#> [1,] "a" "TRUE" "1" "1.5" "f1"
+#> [2,] "b" "FALSE" "0" "2.0" "f2"
+data.matrix(df_coltypes)
+#> a b c d e
+#> [1,] 1 1 1 1.5 1
+#> [2,] 2 0 0 2.0 2
+```
+
+</details>
+
+
+
+
+
+
+
+## `NULL`
+
+Special type of object that:
+
+- Length 0
+- Cannot have attributes
+
+```{r null, results = 'hide'}
+typeof(NULL)
+#> [1] "NULL"
+
+length(NULL)
+#> [1] 0
+```
+
+```{r null_attr, error=TRUE}
+x <- NULL
+attr(x, "y") <- 1
+```
+
+```{r null_check}
+is.null(NULL)
+```
+
+
+## Digestif
+
+Let is use some of this chapter's skills on the `penguins` data.
+
+### Attributes
+
+```{r}
+str(penguins_raw)
+```
+
+```{r}
+str(penguins_raw, give.attr = FALSE)
+```
+
+### Data Frames vs Tibbles
+
+```{r}
+penguins_df <- data.frame(penguins)
+penguins_tb <- penguins #i.e. penguins was already a tibble
+```
+
+#### Printing
+
+* Tip: print out these results in RStudio under different editor themes
+
+```{r, eval = FALSE}
+print(penguins_df) #don't run this
+```
+
+```{r}
+head(penguins_df)
+```
+
+```{r}
+penguins_tb
+```
+
+### Atomic Vectors
+
+```{r}
+species_vector_df <- penguins_df |> select(species)
+species_unlist_df <- penguins_df |> select(species) |> unlist()
+species_pull_df <- penguins_df |> select(species) |> pull()
+
+species_vector_tb <- penguins_tb |> select(species)
+species_unlist_tb <- penguins_tb |> select(species) |> unlist()
+species_pull_tb <- penguins_tb |> select(species) |> pull()
+```
+
+<details>
+<summary>`typeof()` and `class()`</summary>
+```{r}
+typeof(species_vector_df)
+class(species_vector_df)
+
+typeof(species_unlist_df)
+class(species_unlist_df)
+
+typeof(species_pull_df)
+class(species_pull_df)
+
+typeof(species_vector_tb)
+class(species_vector_tb)
+
+typeof(species_unlist_tb)
+class(species_unlist_tb)
+
+typeof(species_pull_tb)
+class(species_pull_tb)
+```
+</details>
+
+### Column Names
+
+```{r}
+colnames(penguins_tb)
+```
+
+```{r}
+names(penguins_tb) == colnames(penguins_tb)
+```
+
+```{r}
+names(penguins_df) == names(penguins_tb)
+```
+
+* What if we only invoke a partial name of a column of a tibble?
+
+```{r, error = TRUE}
+penguins_tb$y
+```
+
+
+
+* What if we only invoke a partial name of a column of a data frame?
+
+```{r}
+head(penguins_df$y) #instead of `year`
+```
+
+* Is this evaluation in alphabetical order or column order?
+
+```{r}
+penguins_df_se_sp <- penguins_df |> select(sex, species)
+penguins_df_sp_se <- penguins_df |> select(species, sex)
+```
+
+```{r}
+head(penguins_df_se_sp$s)
+```
+
+```{r}
+head(penguins_df_sp_se$s)
+```
+
+
+## Chapter Quiz
+
+1. What are the four common types of atomic vectors? What are the two rare types?
+
+<details><summary>Answer(s)</summary>
+The four common types of atomic vector are logical, integer, double and character. The two rarer types are complex and raw.
+</details>
+
+2. What are attributes? How do you get them and set them?
+
+<details><summary>Answer(s)</summary>
+Attributes allow you to associate arbitrary additional metadata to any object. You can get and set individual attributes with `attr(x, "y")` and `attr(x, "y") <- value`; or you can get and set all attributes at once with `attributes()`.
+</details>
+
+3. How is a list different from an atomic vector? How is a matrix different from a data frame?
+
+<details><summary>Answer(s)</summary>
+The elements of a list can be any type (even a list); the elements of an atomic vector are all of the same type. Similarly, every element of a matrix must be the same type; in a data frame, different columns can have different types.
+</details>
+
+4. Can you have a list that is a matrix? Can a data frame have a column that is a matrix?
+
+<details><summary>Answer(s)</summary>
+You can make a list-array by assigning dimensions to a list. You can make a matrix a column of a data frame with `df$x <- matrix()`, or by using `I()` when creating a new data frame `data.frame(x = I(matrix()))`.
+</details>
+
+5. How do tibbles behave differently from data frames?
+
+<details><summary>Answer(s)</summary>
+Tibbles have an enhanced print method, never coerce strings to factors, and provide stricter subsetting methods.
+</details>
+
+
+
+
+
+
+
+
+
+
+
+
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/pQ-xDAPEQaw")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/CpLM6SdpTFY")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/9E4RlbW8vxU")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/LCAgxwm5Ydg")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/DrVY6DE9ymY")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/mmcnkIjANps")`
+
+<details>
+<summary>Meeting chat log</summary>
+
+```
+00:10:18 Oluwafemi Oyedele: Hi, good evening
+00:23:31 Federica Gazzelloni: Hi Kiante!
+00:24:21 Federica Gazzelloni: Thanks Arthur
+00:25:46 Trevin: Welcome Matt!
+00:26:02 Matt Dupree: hello! thank you!
+00:30:34 Federica Gazzelloni: Hello Matt!
+00:30:46 Matt Dupree: hello!
+00:38:24 Ryan Metcalf: `rlang::cpl()` = “complex”. For example `0+1i`
+00:55:37 Trevin: > two <- c(1,2,3)
+> names(two) <- c("one", "two")
+> two
+ one two <NA>
+ 1 2 3
+00:57:25 Ryan Metcalf: Excellent Trevin. You beat me to the output! Assuming we didn't supply the string, `NA` is entered instead.
+01:08:50 Ryan Metcalf: Without further research, this is the "Unix Epoch”. However, varying operating systems use different Epochs.
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/QcdByYHo1ms")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:54:07 Ron: https://www.tidyverse.org/blog/2021/03/clock-0-1-0/
+01:14:39 Robert Hilly: https://www.amazon.com/Effective-Pandas-Patterns-Manipulation-Treading/dp/B09MYXXSFM
+```
+</details>
diff --git a/slides/03_Vectors.Rmd b/slides/03_Vectors.Rmd
@@ -1,2026 +0,0 @@
----
-output: html_document
-editor_options:
- chunk_output_type: inline
----
-# Vectors
-
-**Learning objectives:**
-
-- Learn about different types of vectors and their attributes
-- Navigate through vector types and their value types
-- Venture into factors and date-time objects
-- Discuss the differences between data frames and tibbles
-- Do not get absorbed by the `NA` and `NULL` black hole
-
-```{r ch9_setup, message = FALSE, warning = FALSE}
-library("dplyr")
-library("gt")
-library("palmerpenguins")
-```
-
-
-<details>
-<summary>Session Info</summary>
-```{r}
-utils::sessionInfo()
-```
-</details>
-
-## Aperitif
-
-
-
-### Counting Penguins
-
-Consider this code to count the number of Gentoo penguins in the `penguins` data set. We see that there are 124 Gentoo penguins.
-
-```{r, eval = FALSE}
-sum("Gentoo" == penguins$species)
-# output: 124
-```
-
-### In
-
-One subtle error can arise in trying out `%in%` here instead.
-
-```{r, results = 'hide'}
-species_vector <- penguins |> select(species)
-print("Gentoo" %in% species_vector)
-# output: FALSE
-```
-
-
-
-### Fix: base R
-
-```{r, results = 'hide'}
-species_unlist <- penguins |> select(species) |> unlist()
-print("Gentoo" %in% species_unlist)
-# output: TRUE
-```
-
-### Fix: dplyr
-
-```{r, results = 'hide'}
-species_pull <- penguins |> select(species) |> pull()
-print("Gentoo" %in% species_pull)
-# output: TRUE
-```
-
-### Motivation
-
-* What are the different types of vectors?
-* How does this affect accessing vectors?
-
-<details>
-<summary>Side Quest: Looking up the `%in%` operator</summary>
-If you want to look up the manual pages for the `%in%` operator with the `?`, use backticks:
-
-```{r, eval = FALSE}
-?`%in%`
-```
-
-and we find that `%in%` is a wrapper for the `match()` function.
-
-</details>
-
-
-## Types of Vectors
-
-
-
-Two main types:
-
-- **Atomic**: Elements all the same type.
-- **List**: Elements are different Types.
-
-Closely related but not technically a vector:
-
-- **NULL**: Null elements. Often length zero.
-
-## Atomic Vectors
-
-### Types of atomic vectors
-
-
-
-- **Logical**: True/False
-- **Integer**: Numeric (discrete, no decimals)
-- **Double**: Numeric (continuous, decimals)
-- **Character**: String
-
-### Vectors of Length One
-
-**Scalars** are vectors that consist of a single value.
-
-#### Logicals
-
-```{r vec_lgl}
-lgl1 <- TRUE
-lgl2 <- T #abbreviation for TRUE
-lgl3 <- FALSE
-lgl4 <- F #abbreviation for FALSE
-```
-
-#### Doubles
-
-```{r vec_dbl}
-# integer, decimal, scientific, or hexidecimal format
-dbl1 <- 1
-dbl2 <- 1.234 # decimal
-dbl3 <- 1.234e0 # scientific format
-dbl4 <- 0xcafe # hexidecimal format
-```
-
-#### Integers
-
-Integers must be followed by L and cannot have fractional values
-
-```{r vec_int}
-int1 <- 1L
-int2 <- 1234L
-int3 <- 1234e0L
-int4 <- 0xcafeL
-```
-
-<details>
-<summary>Pop Quiz: Why "L" for integers?</summary>
-Wickham notes that the use of `L` dates back to the **C** programming language and its "long int" type for memory allocation.
-</details>
-
-#### Strings
-
-Strings can use single or double quotes and special characters are escaped with \
-
-```{r vec_str}
-str1 <- "hello" # double quotes
-str2 <- 'hello' # single quotes
-str3 <- "مرحبًا" # Unicode
-str4 <- "\U0001f605" # sweaty_smile
-```
-
-### Longer
-
-There are several ways to make longer vectors:
-
-**1. With single values** inside c() for combine.
-
-```{r long_single}
-lgl_var <- c(TRUE, FALSE)
-int_var <- c(1L, 6L, 10L)
-dbl_var <- c(1, 2.5, 4.5)
-chr_var <- c("these are", "some strings")
-```
-
-
-
-**2. With other vectors**
-
-```{r long_vec}
-c(c(1, 2), c(3, 4)) # output is not nested
-```
-
-<details>
-<summary>Side Quest: rlang</summary>
-
-`{rlang}` has [vector constructor functions too](https://rlang.r-lib.org/reference/vector-construction.html):
-
-- `rlang::lgl(...)`
-- `rlang::int(...)`
-- `rlang::dbl(...)`
-- `rlang::chr(...)`
-
-They look to do both more and less than `c()`.
-
-- More:
- - Enforce type
- - Splice lists
- - More types: `rlang::bytes()`, `rlang::cpl(...)`
-- Less:
- - Stricter rules on names
-
-Note: currently has `questioning` lifecycle badge, since these constructors may get moved to `vctrs`
-
-</details>
-
-### Type and Length
-
-We can determine the type of a vector with `typeof()` and its length with `length()`
-
-```{r type_length, echo = FALSE}
-# typeof(lgl_var)
-# typeof(int_var)
-# typeof(dbl_var)
-# typeof(chr_var)
-#
-# length(lgl_var)
-# length(int_var)
-# length(dbl_var)
-# length(chr_var)
-
-var_names <- c("lgl_var", "int_var", "dbl_var", "chr_var")
-var_values <- c("TRUE, FALSE", "1L, 6L, 10L", "1, 2.5, 4.5", "'these are', 'some strings'")
-var_type <- c("logical", "integer", "double", "character")
-var_length <- c(2, 3, 3, 2)
-
-type_length_df <- data.frame(var_names, var_values, var_type, var_length)
-
-# make gt table
-type_length_df |>
- gt() |>
- cols_align(align = "center") |>
- cols_label(
- var_names ~ "name",
- var_values ~ "value",
- var_type ~ "typeof()",
- var_length ~ "length()"
- ) |>
- tab_header(
- title = "Types of Atomic Vectors",
- subtitle = ""
- ) |>
- tab_footnote(
- footnote = "Source: https://adv-r.hadley.nz/index.html",
- locations = cells_title(groups = "title")
- ) |>
- tab_style(
- style = list(cell_fill(color = "#F9E3D6")),
- locations = cells_body(columns = var_type)
- ) |>
- tab_style(
- style = list(cell_fill(color = "lightcyan")),
- locations = cells_body(columns = var_length)
- )
-```
-
-<details>
-<summary>Side Quest: Penguins</summary>
-```{r}
-typeof(penguins$species)
-class(penguins$species)
-
-typeof(species_unlist)
-class(species_unlist)
-
-typeof(species_pull)
-class(species_pull)
-```
-
-</details>
-
-### Missing values
-
-#### Contagion
-
-For most computations, an operation over values that includes a missing value yields a missing value (unless you're careful)
-
-```{r na_contagion}
-# contagion
-5*NA
-sum(c(1, 2, NA, 3))
-```
-
-#### Exceptions
-
-```{r na_exceptions, eval = FALSE}
-NA ^ 0
-#> [1] 1
-NA | TRUE
-#> [1] TRUE
-NA & FALSE
-#> [1] FALSE
-```
-
-
-#### Innoculation
-
-```{r na_innoculation, eval = FALSE}
-sum(c(1, 2, NA, 3), na.rm = TRUE)
-# output: 6
-```
-
-To search for missing values use `is.na()`
-
-```{r na_search, eval = FALSE}
-x <- c(NA, 5, NA, 10)
-x == NA
-# output: NA NA NA NA [BATMAN!]
-```
-
-```{r na_search_better, eval = FALSE}
-is.na(x)
-# output: TRUE FALSE TRUE FALSE
-```
-
-<details>
-<summary>Side Quest: NA Types</summary>
-
-Each type has its own NA type
-
-- Logical: `NA`
-- Integer: `NA_integer`
-- Double: `NA_double`
-- Character: `NA_character`
-
-This may not matter in many contexts.
-
-But this does matter for operations where types matter like `dplyr::if_else()`.
-</details>
-
-
-### Testing
-
-**What type of vector `is.*`() it?**
-
-Test data type:
-
-- Logical: `is.logical()`
-- Integer: `is.integer()`
-- Double: `is.double()`
-- Character: `is.character()`
-
-**What type of object is it?**
-
-Don't test objects with these tools:
-
-- `is.vector()`
-- `is.atomic()`
-- `is.numeric()`
-
-They don’t test if you have a vector, atomic vector, or numeric vector; you’ll need to carefully read the documentation to figure out what they actually do (preview: *attributes*)
-
-<details>
-<summary>Side Quest: rlang</summary>
-
-Instead, maybe, use `{rlang}`
-
-- `rlang::is_vector`
-- `rlang::is_atomic`
-
-```{r test_rlang}
-# vector
-rlang::is_vector(c(1, 2))
-rlang::is_vector(list(1, 2))
-
-# atomic
-rlang::is_atomic(c(1, 2))
-rlang::is_atomic(list(1, "a"))
-
-```
-
-See more [here](https://rlang.r-lib.org/reference/type-predicates.html)
-</details>
-
-
-### Coercion
-
-* R follows rules for coercion: character → double → integer → logical
-
-* R can coerce either automatically or explicitly
-
-#### **Automatic**
-
-Two contexts for automatic coercion:
-
-1. Combination
-2. Mathematical
-
-##### Coercion by Combination:
-
-```{r coerce_c}
-str(c(TRUE, "TRUE"))
-```
-
-##### Coercion by Mathematical operations:
-
-```{r coerce_math}
-# imagine a logical vector about whether an attribute is present
-has_attribute <- c(TRUE, FALSE, TRUE, TRUE)
-
-# number with attribute
-sum(has_attribute)
-```
-
-#### **Explicit**
-
-<!--
-
-Use `as.*()`
-
-- Logical: `as.logical()`
-- Integer: `as.integer()`
-- Double: `as.double()`
-- Character: `as.character()`
-
--->
-
-```{r explicit_coercion, echo = FALSE}
-# dbl_var
-# as.integer(dbl_var)
-# lgl_var
-# as.character(lgl_var)
-
-var_names <- c("lgl_var", "int_var", "dbl_var", "chr_var")
-var_values <- c("TRUE, FALSE", "1L, 6L, 10L", "1, 2.5, 4.5", "'these are', 'some strings'")
-as_logical <- c("TRUE FALSE", "TRUE TRUE TRUE", "TRUE TRUE TRUE", "NA NA")
-as_integer <- c("1 0", "1 6 10", "1 2 4", 'NA_integer')
-as_double <- c("1 0", "1 6 10", "1.0 2.5 4.5", 'NA_double')
-as_character <- c("'TRUE' 'FALSE'", "'1' '6' '10'", "'1' '2.5' '4.5'", "'these are', 'some strings'")
-
-coercion_df <- data.frame(var_names, var_values, as_logical, as_integer, as_double, as_character)
-
-coercion_df |>
- gt() |>
- cols_align(align = "center") |>
- cols_label(
- var_names ~ "name",
- var_values ~ "value",
- as_logical ~ "as.logical()",
- as_integer ~ "as.integer()",
- as_double ~ "as.double()",
- as_character ~ "as.character()"
- ) |>
- tab_header(
- title = "Coercion of Atomic Vectors",
- subtitle = ""
- ) |>
- tab_footnote(
- footnote = "Source: https://adv-r.hadley.nz/index.html",
- locations = cells_title(groups = "title")
- ) |>
- tab_style(
- style = list(cell_fill(color = "#F9E3D6")),
- locations = cells_body(columns = c(as_logical, as_double))
- ) |>
- tab_style(
- style = list(cell_fill(color = "lightcyan")),
- locations = cells_body(columns = c(as_integer, as_character))
- )
-```
-
-But note that coercion may fail in one of two ways, or both:
-
-- With warning/error
-- NAs
-
-```{r coerce_error}
-as.integer(c(1, 2, "three"))
-```
-
-### Exercises
-
-1. How do you create raw and complex scalars?
-
-<details><summary>Answer(s)</summary>
-```{r, eval = FALSE}
-as.raw(42)
-#> [1] 2a
-charToRaw("A")
-#> [1] 41
-complex(length.out = 1, real = 1, imaginary = 1)
-#> [1] 1+1i
-```
-</details>
-
-2. Test your knowledge of the vector coercion rules by predicting the output of the following uses of c():
-
-```{r, eval = FALSE}
-c(1, FALSE)
-c("a", 1)
-c(TRUE, 1L)
-```
-
-<details><summary>Answer(s)</summary>
-```{r, eval = FALSE}
-c(1, FALSE) # will be coerced to double -> 1 0
-c("a", 1) # will be coerced to character -> "a" "1"
-c(TRUE, 1L) # will be coerced to integer -> 1 1
-```
-</details>
-
-3. Why is `1 == "1"` true? Why is `-1 < FALSE` true? Why is `"one" < 2` false?
-
-<details><summary>Answer(s)</summary>
-These comparisons are carried out by operator-functions (==, <), which coerce their arguments to a common type. In the examples above, these types will be character, double and character: 1 will be coerced to "1", FALSE is represented as 0 and 2 turns into "2" (and numbers precede letters in lexicographic order (may depend on locale)).
-
-</details>
-
-4. Why is the default missing value, NA, a logical vector? What’s special about logical vectors?
-
-<details><summary>Answer(s)</summary>
-The presence of missing values shouldn’t affect the type of an object. Recall that there is a type-hierarchy for coercion from character → double → integer → logical. When combining `NA`s with other atomic types, the `NA`s will be coerced to integer (`NA_integer_`), double (`NA_real_`) or character (`NA_character_`) and not the other way round. If `NA` were a character and added to a set of other values all of these would be coerced to character as well.
-</details>
-
-5. Precisely what do `is.atomic()`, `is.numeric()`, and `is.vector()` test for?
-
-<details><summary>Answer(s)</summary>
-The documentation states that:
-
-* `is.atomic()` tests if an object is an atomic vector (as defined in *Advanced R*) or is `NULL` (!).
-* `is.numeric()` tests if an object has type integer or double and is not of class `factor`, `Date`, `POSIXt` or `difftime`.
-* `is.vector()` tests if an object is a vector (as defined in *Advanced R*) or an expression and has no attributes, apart from names.
-
-Atomic vectors are defined in *Advanced R* as objects of type logical, integer, double, complex, character or raw. Vectors are defined as atomic vectors or lists.
-</details>
-
-
-
-## Attributes
-
-Attributes are name-value pairs that attach metadata to an object(vector).
-
-* **Name-value pairs**: attributes have a name and a value
-* **Metadata**: not data itself, but data about the data
-
-### How?
-
-#### Getting and Setting
-
-Three functions:
-
-1. retrieve and modify single attributes with `attr()`
-2. retrieve en masse with `attributes()`
-3. set en masse with `structure()`
-
-**Single attribute**
-
-Use `attr()`
-
-```{r attr_single}
-# some object
-a <- c(1, 2, 3)
-
-# set attribute
-attr(x = a, which = "attribute_name") <- "some attribute"
-
-# get attribute
-attr(a, "attribute_name")
-```
-
-**Multiple attributes**
-
-To set multiple attributes, use `structure()` To get multiple attributes, use `attributes()`
-
-```{r attr_multiple_not_from_textbook, echo = FALSE}
-# b <- c(4, 5, 6)
-#
-# # set
-# b <- structure(
-# .Data = b,
-# attrib1_name = "first_attribute",
-# attrib2_name = "second_attribute"
-# )
-#
-# # get
-# attributes(b)
-# str(attributes(b))
-```
-
-
-```{r attr_multiple, eval = FALSE}
-a <- 1:3
-attr(a, "x") <- "abcdef"
-attr(a, "x")
-#> [1] "abcdef"
-
-attr(a, "y") <- 4:6
-str(attributes(a))
-#> List of 2
-#> $ x: chr "abcdef"
-#> $ y: int [1:3] 4 5 6
-
-# Or equivalently
-a <- structure(
- 1:3,
- x = "abcdef",
- y = 4:6
-)
-str(attributes(a))
-#> List of 2
-#> $ x: chr "abcdef"
-#> $ y: int [1:3] 4 5 6
-```
-
-
-
-### Why
-
-Three particularly important attributes:
-
-1. **names** - a character vector giving each element a name
-2. **dimension** - (or dim) turns vectors into matrices and arrays
-3. **class** - powers the S3 object system (we'll learn more about this in chapter 13)
-
-Most attributes are lost by most operations. Only two attributes are routinely preserved: names and dimension.
-
-#### Names
-
-~~Three~~ Four ways to name:
-
-```{r names}
-# (1) When creating it:
-x <- c(A = 1, B = 2, C = 3)
-x
-
-# (2) By assigning a character vector to names()
-y <- 1:3
-names(y) <- c("a", "b", "c")
-y
-
-# (3) Inline, with setNames():
-z <- setNames(1:3, c("a", "b", "c"))
-z
-
-```
-
-
-
-```{r names_via_rlang}
-# (4) By setting names--with {rlang}
-a <- 1:3
-rlang::set_names(
- x = a,
- nm = c("a", "b", "c")
-)
-
-```
-
-
-
-* You can remove names from a vector by using `x <- unname(x)` or `names(x) <- NULL`.
-* Thematically but not directly related: labelled class vectors with `haven::labelled()`
-
-
-#### Dimensions
-
-Create matrices and arrays with `matrix()` and `array()`, or by using the assignment form of `dim()`:
-
-```{r dimensions}
-# Two scalar arguments specify row and column sizes
-x <- matrix(1:6, nrow = 2, ncol = 3)
-x
-
-# One vector argument to describe all dimensions
-y <- array(1:24, c(2, 3, 4)) # rows, columns, no of arrays
-y
-
-# You can also modify an object in place by setting dim()
-z <- 1:6
-dim(z) <- c(2, 3) # rows, columns
-z
-
-a <- 1:24
-dim(a) <- c(2, 3, 4) # rows, columns, no of arrays
-a
-```
-
-##### Functions for working with vectors, matrices and arrays:
-
-Vector | Matrix | Array
-:----- | :---------- | :-----
-`names()` | `rownames()`, `colnames()` | `dimnames()`
-`length()` | `nrow()`, `ncol()` | `dim()`
-`c()` | `rbind()`, `cbind()` | `abind::abind()`
-— | `t()` | `aperm()`
-`is.null(dim(x))` | `is.matrix()` | `is.array()`
-
-* **Caution**: A vector without a `dim` attribute set is often thought of as 1-dimensional, but actually has `NULL` dimensions.
-* One dimension?
-
-```{r examples_of_1D, eval = FALSE}
-str(1:3) # 1d vector
-#> int [1:3] 1 2 3
-str(matrix(1:3, ncol = 1)) # column vector
-#> int [1:3, 1] 1 2 3
-str(matrix(1:3, nrow = 1)) # row vector
-#> int [1, 1:3] 1 2 3
-str(array(1:3, 3)) # "array" vector
-#> int [1:3(1d)] 1 2 3
-```
-
-
-### Exercises
-
-1. How is `setNames()` implemented? How is `unname()` implemented? Read the source code.
-
-<details><summary>Answer(s)</summary>
-`setNames()` is implemented as:
-
-```{r, eval = FALSE}
-setNames <- function(object = nm, nm) {
- names(object) <- nm
- object
-}
-```
-
-Because the data argument comes first, `setNames()` also works well with the magrittr-pipe operator. When no first argument is given, the result is a named vector (this is rather untypical as required arguments usually come first):
-
-```{r, eval = FALSE}
-setNames( , c("a", "b", "c"))
-#> a b c
-#> "a" "b" "c"
-```
-
-`unname()` is implemented in the following way:
-
-```{r, eval = FALSE}
-unname <- function(obj, force = FALSE) {
- if (!is.null(names(obj)))
- names(obj) <- NULL
- if (!is.null(dimnames(obj)) && (force || !is.data.frame(obj)))
- dimnames(obj) <- NULL
- obj
-}
-```
-
-`unname()` removes existing names (or dimnames) by setting them to `NULL`.
-</details>
-
-2. What does `dim()` return when applied to a 1-dimensional vector? When might you use `NROW()` or `NCOL()`?
-
-<details><summary>Answer(s)</summary>
-
-> dim() will return NULL when applied to a 1d vector.
-
-One may want to use `NROW()` or `NCOL()` to handle atomic vectors, lists and NULL values in the same way as one column matrices or data frames. For these objects `nrow()` and `ncol()` return NULL:
-
-```{r, eval = FALSE}
-x <- 1:10
-
-# Return NULL
-nrow(x)
-#> NULL
-ncol(x)
-#> NULL
-
-# Pretend it's a column vector
-NROW(x)
-#> [1] 10
-NCOL(x)
-#> [1] 1
-```
-
-</details>
-
-3. How would you describe the following three objects? What makes them different from `1:5`?
-
-```{r}
-x1 <- array(1:5, c(1, 1, 5))
-x2 <- array(1:5, c(1, 5, 1))
-x3 <- array(1:5, c(5, 1, 1))
-```
-
-<details><summary>Answer(s)</summary>
-```{r, eval = FALSE}
-x1 <- array(1:5, c(1, 1, 5)) # 1 row, 1 column, 5 in third dim.
-x2 <- array(1:5, c(1, 5, 1)) # 1 row, 5 columns, 1 in third dim.
-x3 <- array(1:5, c(5, 1, 1)) # 5 rows, 1 column, 1 in third dim.
-```
-</details>
-
-
-4. An early draft used this code to illustrate `structure()`:
-
-```{r, eval = FALSE}
-structure(1:5, comment = "my attribute")
-#> [1] 1 2 3 4 5
-```
-
-But when you print that object you don’t see the comment attribute. Why? Is the attribute missing, or is there something else special about it?
-
-<details><summary>Answer(s)</summary>
-The documentation states (see `?comment`):
-
-> Contrary to other attributes, the comment is not printed (by print or print.default).
-
-Also, from `?attributes:`
-
-> Note that some attributes (namely class, comment, dim, dimnames, names, row.names and tsp) are treated specially and have restrictions on the values which can be set.
-
-We can retrieve comment attributes by calling them explicitly:
-
-```{r, eval = FALSE}
-foo <- structure(1:5, comment = "my attribute")
-
-attributes(foo)
-#> $comment
-#> [1] "my attribute"
-attr(foo, which = "comment")
-#> [1] "my attribute"
-```
-
-</details>
-
-
-
-## **Class** - S3 atomic vectors
-
-
-
-Credit: [Advanced R](https://adv-r.hadley.nz/index.html) by Hadley Wickham
-
-**Having a class attribute turns an object into an S3 object.**
-
-What makes S3 atomic vectors different?
-
-1. behave differently from a regular vector when passed to a generic function
-2. often store additional information in other attributes
-
-Four important S3 vectors used in base R:
-
-1. **Factors** (categorical data)
-2. **Dates**
-3. **Date-times** (POSIXct)
-4. **Durations** (difftime)
-
-### Factors
-
-A factor is a vector used to store categorical data that can contain only predefined values.
-
-Factors are integer vectors with:
-
-- Class: "factor"
-- Attributes: "levels", or the set of allowed values
-
-```{r factor}
-colors = c('red', 'blue', 'green','red','red', 'green')
-# Build a factor
-a_factor <- factor(
- # values
- x = colors,
- # exhaustive list of values
- levels = c('red', 'blue', 'green', 'yellow')
-)
-```
-
-```{r factor_table}
-# Useful when some possible values are not present in the data
-table(colors)
-table(a_factor)
-
-# - type
-typeof(a_factor)
-class(a_factor)
-
-# - attributes
-attributes(a_factor)
-```
-
-#### Custom Order
-
-Factors can be ordered. This can be useful for models or visualizations where order matters.
-
-```{r factor_ordered}
-
-values <- c('high', 'med', 'low', 'med', 'high', 'low', 'med', 'high')
-
-ordered_factor <- ordered(
- # values
- x = values,
- # levels in ascending order
- levels = c('low', 'med', 'high')
-)
-
-# Inspect
-ordered_factor
-
-table(values)
-table(ordered_factor)
-```
-
-### Dates
-
-Dates are:
-
-- Double vectors
-- With class "Date"
-- No other attributes
-
-```{r dates}
-notes_date <- Sys.Date()
-
-# type
-typeof(notes_date)
-
-# class
-attributes(notes_date)
-```
-
-The double component represents the number of days since since the [Unix epoch](https://en.wikipedia.org/wiki/Unix_time) `1970-01-01`
-
-```{r days_since_1970}
-date <- as.Date("1970-02-01")
-unclass(date)
-```
-
-### Date-times
-
-There are 2 Date-time representations in base R:
-
-- POSIXct, where "ct" denotes *calendar time*
-- POSIXlt, where "lt" designates *local time*
-
-<!--
-
-Just for fun:
-"How to pronounce 'POSIXct'?"
-https://www.howtopronounce.com/posixct
-
--->
-
-We'll focus on POSIXct because:
-
-- Simplest
-- Built on an atomic (double) vector
-- Most appropriate for use in a data frame
-
-Let's now build and deconstruct a Date-time
-
-```{r date_time}
-# Build
-note_date_time <- as.POSIXct(
- x = Sys.time(), # time
- tz = "America/New_York" # time zone, used only for formatting
-)
-
-# Inspect
-note_date_time
-
-# - type
-typeof(note_date_time)
-
-# - attributes
-attributes(note_date_time)
-
-structure(note_date_time, tzone = "Europe/Paris")
-```
-
-```{r date_time_format}
-date_time <- as.POSIXct("2024-02-22 12:34:56", tz = "EST")
-unclass(date_time)
-```
-
-
-### Durations
-
-Durations represent the amount of time between pairs of dates or date-times.
-
-- Double vectors
-- Class: "difftime"
-- Attributes: "units", or the unit of duration (e.g., weeks, hours, minutes, seconds, etc.)
-
-```{r durations}
-# Construct
-one_minute <- as.difftime(1, units = "mins")
-# Inspect
-one_minute
-
-# Dissect
-# - type
-typeof(one_minute)
-# - attributes
-attributes(one_minute)
-```
-
-```{r durations_math}
-time_since_01_01_1970 <- notes_date - date
-time_since_01_01_1970
-```
-
-
-See also:
-
-- [`lubridate::make_difftime()`](https://lubridate.tidyverse.org/reference/make_difftime.html)
-- [`clock::date_time_build()`](https://clock.r-lib.org/reference/date_time_build.html)
-
-
-### Exercises
-
-1. What sort of object does `table()` return? What is its type? What attributes does it have? How does the dimensionality change as you tabulate more variables?
-
-<details><summary>Answer(s)</summary>
-
-`table()` returns a contingency table of its input variables. It is implemented as an integer vector with class table and dimensions (which makes it act like an array). Its attributes are dim (dimensions) and dimnames (one name for each input column). The dimensions correspond to the number of unique values (factor levels) in each input variable.
-
-```{r, eval = FALSE}
-x <- table(mtcars[c("vs", "cyl", "am")])
-
-typeof(x)
-#> [1] "integer"
-attributes(x)
-#> $dim
-#> [1] 2 3 2
-#>
-#> $dimnames
-#> $dimnames$vs
-#> [1] "0" "1"
-#>
-#> $dimnames$cyl
-#> [1] "4" "6" "8"
-#>
-#> $dimnames$am
-#> [1] "0" "1"
-#>
-#>
-#> $class
-#> [1] "table"
-```
-</details>
-
-2. What happens to a factor when you modify its levels?
-
-```{r, eval = FALSE}
-f1 <- factor(letters)
-levels(f1) <- rev(levels(f1))
-```
-
-<details><summary>Answer(s)</summary>
-The underlying integer values stay the same, but the levels are changed, making it look like the data has changed.
-
-```{r, eval = FALSE}
-f1 <- factor(letters)
-f1
-#> [1] a b c d e f g h i j k l m n o p q r s t u v w x y z
-#> Levels: a b c d e f g h i j k l m n o p q r s t u v w x y z
-as.integer(f1)
-#> [1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
-#> [26] 26
-
-levels(f1) <- rev(levels(f1))
-f1
-#> [1] z y x w v u t s r q p o n m l k j i h g f e d c b a
-#> Levels: z y x w v u t s r q p o n m l k j i h g f e d c b a
-as.integer(f1)
-#> [1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
-#> [26] 26
-```
-</details>
-
-3. What does this code do? How do `f2` and `f3` differ from `f1`?
-
-```{r, eval = FALSE}
-f2 <- rev(factor(letters))
-f3 <- factor(letters, levels = rev(letters))
-```
-
-<details><summary>Answer(s)</summary>
-For `f2` and `f3` either the order of the factor elements or its levels are being reversed. For `f1` both transformations are occurring.
-
-```{r, eval = FALSE}
-# Reverse element order
-(f2 <- rev(factor(letters)))
-#> [1] z y x w v u t s r q p o n m l k j i h g f e d c b a
-#> Levels: a b c d e f g h i j k l m n o p q r s t u v w x y z
-as.integer(f2)
-#> [1] 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2
-#> [26] 1
-
-# Reverse factor levels (when creating factor)
-(f3 <- factor(letters, levels = rev(letters)))
-#> [1] a b c d e f g h i j k l m n o p q r s t u v w x y z
-#> Levels: z y x w v u t s r q p o n m l k j i h g f e d c b a
-as.integer(f3)
-#> [1] 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2
-#> [26] 1
-```
-</details>
-
-
-
-
-
-
-## Lists
-
-* sometimes called a generic vector or recursive vector
-* Recall ([section 2.3.3](https://adv-r.hadley.nz/names-values.html#list-references)): each element is really a *reference* to another object
-* an be composed of elements of different types (as opposed to atomic vectors which must be of only one type)
-
-### Constructing
-
-Simple lists:
-
-```{r list_simple}
-# Construct
-simple_list <- list(
- c(TRUE, FALSE), # logicals
- 1:20, # integers
- c(1.2, 2.3, 3.4), # doubles
- c("primo", "secundo", "tercio") # characters
-)
-
-simple_list
-
-# Inspect
-# - type
-typeof(simple_list)
-# - structure
-str(simple_list)
-
-# Accessing
-simple_list[1]
-simple_list[2]
-simple_list[3]
-simple_list[4]
-
-simple_list[[1]][2]
-simple_list[[2]][8]
-simple_list[[3]][2]
-simple_list[[4]][3]
-```
-
-Even Simpler List
-
-```{r list_simpler}
-# Construct
-simpler_list <- list(TRUE, FALSE,
- 1, 2, 3, 4, 5,
- 1.2, 2.3, 3.4,
- "primo", "secundo", "tercio")
-
-# Accessing
-simpler_list[1]
-simpler_list[5]
-simpler_list[9]
-simpler_list[11]
-```
-
-Nested lists:
-
-```{r list_nested}
-nested_list <- list(
- # first level
- list(
- # second level
- list(
- # third level
- list(1)
- )
- )
-)
-
-str(nested_list)
-```
-
-Like JSON.
-
-Combined lists
-
-```{r list_combined}
-# with list()
-list_comb1 <- list(list(1, 2), list(3, 4))
-# with c()
-list_comb2 <- c(list(1, 2), list(3, 4))
-
-# compare structure
-str(list_comb1)
-str(list_comb2)
-
-# does this work if they are different data types?
-list_comb3 <- c(list(1, 2), list(TRUE, FALSE))
-str(list_comb3)
-```
-
-### Testing
-
-Check that is a list:
-
-- `is.list()`
-- \`rlang::is_list()\`\`
-
-The two do the same, except that the latter can check for the number of elements
-
-```{r list_test}
-# is list
-base::is.list(list_comb2)
-rlang::is_list(list_comb2)
-
-# is list of 4 elements
-rlang::is_list(x = list_comb2, n = 4)
-
-# is a vector (of a special type)
-# remember the family tree?
-rlang::is_vector(list_comb2)
-```
-
-### Coercion
-
-Use `as.list()`
-
-```{r list_coercion}
-list(1:3)
-as.list(1:3)
-```
-
-### Matrices and arrays
-
-Although not often used, the dimension attribute can be added to create **list-matrices** or **list-arrays**.
-
-```{r list_matrices_arrays}
-l <- list(1:3, "a", TRUE, 1.0)
-dim(l) <- c(2, 2)
-l
-
-l[[1, 1]]
-```
-
-
-### Exercises
-
-1. List all the ways that a list differs from an atomic vector.
-
-<details><summary>Answer(s)</summary>
-
-* Atomic vectors are always homogeneous (all elements must be of the same type). Lists may be heterogeneous (the elements can be of different types) as described in the introduction of the vectors chapter.
-* Atomic vectors point to one address in memory, while lists contain a separate reference for each element. (This was described in the list sections of the vectors and the names and values chapters.)
-
-```{r, eval = FALSE}
-lobstr::ref(1:2)
-#> [1:0x7fcd936f6e80] <int>
-lobstr::ref(list(1:2, 2))
-#> █ [1:0x7fcd93d53048] <list>
-#> ├─[2:0x7fcd91377e40] <int>
-#> └─[3:0x7fcd93b41eb0] <dbl>
-```
-
-
-* Subsetting with out-of-bounds and NA values leads to different output. For example, [ returns NA for atomics and NULL for lists. (This is described in more detail within the subsetting chapter.)
-
-```{r, eval = FALSE}
-# Subsetting atomic vectors
-(1:2)[3]
-#> [1] NA
-(1:2)[NA]
-#> [1] NA NA
-
-# Subsetting lists
-as.list(1:2)[3]
-#> [[1]]
-#> NULL
-as.list(1:2)[NA]
-#> [[1]]
-#> NULL
-#>
-#> [[2]]
-#> NULL
-```
-
-
-</details>
-
-2. Why do you need to use `unlist()` to convert a list to an atomic vector? Why doesn’t `as.vector()` work?
-
-<details><summary>Answer(s)</summary>
-A list is already a vector, though not an atomic one! Note that as.vector() and is.vector() use different definitions of “vector!”
-
-```{r, eval = FALSE}
-is.vector(as.vector(mtcars))
-#> [1] FALSE
-```
-
-</details>
-
-3. Compare and contrast `c()` and `unlist()` when combining a date and date-time into a single vector.
-
-<details><summary>Answer(s)</summary>
-Date and date-time objects are both built upon doubles. While dates store the number of days since the reference date 1970-01-01 (also known as “the Epoch”) in days, date-time-objects (POSIXct) store the time difference to this date in seconds.
-
-```{r, eval = FALSE}
-date <- as.Date("1970-01-02")
-dttm_ct <- as.POSIXct("1970-01-01 01:00", tz = "UTC")
-
-# Internal representations
-unclass(date)
-#> [1] 1
-unclass(dttm_ct)
-#> [1] 3600
-#> attr(,"tzone")
-#> [1] "UTC"
-```
-
-As the c() generic only dispatches on its first argument, combining date and date-time objects via c() could lead to surprising results in older R versions (pre R 4.0.0):
-
-```{r, eval = FALSE}
-# Output in R version 3.6.2
-c(date, dttm_ct) # equal to c.Date(date, dttm_ct)
-#> [1] "1970-01-02" "1979-11-10"
-c(dttm_ct, date) # equal to c.POSIXct(date, dttm_ct)
-#> [1] "1970-01-01 02:00:00 CET" "1970-01-01 01:00:01 CET"
-```
-
-In the first statement above c.Date() is executed, which incorrectly treats the underlying double of dttm_ct (3600) as days instead of seconds. Conversely, when c.POSIXct() is called on a date, one day is counted as one second only.
-
-We can highlight these mechanics by the following code:
-
-```{r, eval = FALSE}
-# Output in R version 3.6.2
-unclass(c(date, dttm_ct)) # internal representation
-#> [1] 1 3600
-date + 3599
-#> "1979-11-10"
-```
-
-As of R 4.0.0 these issues have been resolved and both methods now convert their input first into POSIXct and Date, respectively.
-
-```{r, eval = FALSE}
-c(dttm_ct, date)
-#> [1] "1970-01-01 01:00:00 UTC" "1970-01-02 00:00:00 UTC"
-unclass(c(dttm_ct, date))
-#> [1] 3600 86400
-
-c(date, dttm_ct)
-#> [1] "1970-01-02" "1970-01-01"
-unclass(c(date, dttm_ct))
-#> [1] 1 0
-```
-
-However, as c() strips the time zone (and other attributes) of POSIXct objects, some caution is still recommended.
-
-```{r, eval = FALSE}
-(dttm_ct <- as.POSIXct("1970-01-01 01:00", tz = "HST"))
-#> [1] "1970-01-01 01:00:00 HST"
-attributes(c(dttm_ct))
-#> $class
-#> [1] "POSIXct" "POSIXt"
-```
-
-A package that deals with these kinds of problems in more depth and provides a structural solution for them is the {vctrs} package9 which is also used throughout the tidyverse.10
-
-Let’s look at unlist(), which operates on list input.
-
-```{r, eval = FALSE}
-# Attributes are stripped
-unlist(list(date, dttm_ct))
-#> [1] 1 39600
-```
-
-We see again that dates and date-times are internally stored as doubles. Unfortunately, this is all we are left with, when unlist strips the attributes of the list.
-
-To summarise: c() coerces types and strips time zones. Errors may have occurred in older R versions because of inappropriate method dispatch/immature methods. unlist() strips attributes.
-</details>
-
-
-
-## Data frames and tibbles
-
-
-
-Credit: [Advanced R](https://adv-r.hadley.nz/index.html) by Hadley Wickham
-
-### Data frame
-
-A data frame is a:
-
-- Named list of vectors (i.e., column names)
-- Attributes:
- - (column) `names`
- - `row.names`
- - Class: "data frame"
-
-```{r data_frame}
-# Construct
-df <- data.frame(
- col1 = c(1, 2, 3), # named atomic vector
- col2 = c("un", "deux", "trois") # another named atomic vector
- # ,stringsAsFactors = FALSE # default for versions after R 4.1
-)
-
-# Inspect
-df
-
-# Deconstruct
-# - type
-typeof(df)
-# - attributes
-attributes(df)
-```
-
-```{r df_functions}
-rownames(df)
-colnames(df)
-names(df) # Same as colnames(df)
-
-nrow(df)
-ncol(df)
-length(df) # Same as ncol(df)
-```
-
-Unlike other lists, the length of each vector must be the same (i.e. as many vector elements as rows in the data frame).
-
-### Tibble
-
-Created to relieve some of the frustrations and pain points created by data frames, tibbles are data frames that are:
-
-- Lazy (do less)
-- Surly (complain more)
-
-#### Lazy
-
-Tibbles do not:
-
-- Coerce strings
-- Transform non-syntactic names
-- Recycle vectors of length greater than 1
-
-**Coerce strings**
-
-```{r tbl_no_coerce}
-chr_col <- c("don't", "factor", "me", "bro")
-
-# data frame
-df <- data.frame(
- a = chr_col,
- # in R 4.1 and earlier, this was the default
- stringsAsFactors = TRUE
-)
-
-# tibble
-tbl <- tibble::tibble(
- a = chr_col
-)
-
-# contrast the structure
-str(df$a)
-str(tbl$a)
-
-```
-
-**Transform non-syntactic names**
-
-```{r tbl_col_name}
-# data frame
-df <- data.frame(
- `1` = c(1, 2, 3)
-)
-
-# tibble
-tbl <- tibble::tibble(
- `1` = c(1, 2, 3)
-)
-
-# contrast the names
-names(df)
-names(tbl)
-```
-
-**Recycle vectors of length greater than 1**
-
-```{r tbl_recycle, error=TRUE}
-# data frame
-df <- data.frame(
- col1 = c(1, 2, 3, 4),
- col2 = c(1, 2)
-)
-
-# tibble
-tbl <- tibble::tibble(
- col1 = c(1, 2, 3, 4),
- col2 = c(1, 2)
-)
-```
-
-#### Surly
-
-Tibbles do only what they're asked and complain if what they're asked doesn't make sense:
-
-- Subsetting always yields a tibble
-- Complains if cannot find column
-
-**Subsetting always yields a tibble**
-
-```{r tbl_subset}
-# data frame
-df <- data.frame(
- col1 = c(1, 2, 3, 4)
-)
-
-# tibble
-tbl <- tibble::tibble(
- col1 = c(1, 2, 3, 4)
-)
-
-# contrast
-df_col <- df[, "col1"]
-str(df_col)
-tbl_col <- tbl[, "col1"]
-str(tbl_col)
-
-# to select a vector, do one of these instead
-tbl_col_1 <- tbl[["col1"]]
-str(tbl_col_1)
-tbl_col_2 <- dplyr::pull(tbl, col1)
-str(tbl_col_2)
-```
-
-**Complains if cannot find column**
-
-```{r tbl_col_match, warning=TRUE}
-names(df)
-df$col
-
-names(tbl)
-tbl$col
-```
-
-#### One more difference
-
-**`tibble()` allows you to refer to variables created during construction**
-
-```{r df_tibble_diff}
-tibble::tibble(
- x = 1:3,
- y = x * 2 # x refers to the line above
-)
-```
-
-<details>
-<summary>Side Quest: Row Names</summary>
-
-- character vector containing only unique values
-- get and set with `rownames()`
-- can use them to subset rows
-
-```{r row_names}
-df3 <- data.frame(
- age = c(35, 27, 18),
- hair = c("blond", "brown", "black"),
- row.names = c("Bob", "Susan", "Sam")
-)
-df3
-
-rownames(df3)
-df3["Bob", ]
-
-rownames(df3) <- c("Susan", "Bob", "Sam")
-rownames(df3)
-df3["Bob", ]
-```
-
-There are three reasons why row names are undesirable:
-
-3. Metadata is data, so storing it in a different way to the rest of the data is fundamentally a bad idea.
-2. Row names are a poor abstraction for labelling rows because they only work when a row can be identified by a single string. This fails in many cases.
-3. Row names must be unique, so any duplication of rows (e.g. from bootstrapping) will create new row names.
-
-</details>
-
-
-### Printing
-
-Data frames and tibbles print differently
-
-```{r df_tibble_print}
-df3
-tibble::as_tibble(df3)
-```
-
-
-### Subsetting
-
-Two undesirable subsetting behaviours:
-
-1. When you subset columns with `df[, vars]`, you will get a vector if vars selects one variable, otherwise you’ll get a data frame, unless you always remember to use `df[, vars, drop = FALSE]`.
-2. When you attempt to extract a single column with `df$x` and there is no column `x`, a data frame will instead select any variable that starts with `x`. If no variable starts with `x`, `df$x` will return NULL.
-
-Tibbles tweak these behaviours so that a [ always returns a tibble, and a $ doesn’t do partial matching and warns if it can’t find a variable (*this is what makes tibbles surly*).
-
-### Testing
-
-Whether data frame: `is.data.frame()`. Note: both data frame and tibble are data frames.
-
-Whether tibble: `tibble::is_tibble`. Note: only tibbles are tibbles. Vanilla data frames are not.
-
-### Coercion
-
-- To data frame: `as.data.frame()`
-- To tibble: `tibble::as_tibble()`
-
-### List Columns
-
-List-columns are allowed in data frames but you have to do a little extra work by either adding the list-column after creation or wrapping the list in `I()`
-
-```{r list_columns}
-df4 <- data.frame(x = 1:3)
-df4$y <- list(1:2, 1:3, 1:4)
-df4
-
-df5 <- data.frame(
- x = 1:3,
- y = I(list(1:2, 1:3, 1:4))
-)
-df5
-```
-
-### Matrix and data frame columns
-
-- As long as the number of rows matches the data frame, it’s also possible to have a matrix or data frame as a column of a data frame.
-- same as list-columns, must either addi the list-column after creation or wrapping the list in `I()`
-
-```{r matrix_df_columns}
-dfm <- data.frame(
- x = 1:3 * 10,
- y = I(matrix(1:9, nrow = 3))
-)
-
-dfm$z <- data.frame(a = 3:1, b = letters[1:3], stringsAsFactors = FALSE)
-
-str(dfm)
-dfm$y
-dfm$z
-```
-
-
-### Exercises
-
-1. Can you have a data frame with zero rows? What about zero columns?
-
-<details><summary>Answer(s)</summary>
-Yes, you can create these data frames easily; either during creation or via subsetting. Even both dimensions can be zero. Create a 0-row, 0-column, or an empty data frame directly:
-
-```{r, eval = FALSE}
-data.frame(a = integer(), b = logical())
-#> [1] a b
-#> <0 rows> (or 0-length row.names)
-
-data.frame(row.names = 1:3) # or data.frame()[1:3, ]
-#> data frame with 0 columns and 3 rows
-
-data.frame()
-#> data frame with 0 columns and 0 rows
-```
-
-Create similar data frames via subsetting the respective dimension with either 0, `NULL`, `FALSE` or a valid 0-length atomic (`logical(0)`, `character(0)`, `integer(0)`, `double(0)`). Negative integer sequences would also work. The following example uses a zero:
-
-```{r, eval = FALSE}
-mtcars[0, ]
-#> [1] mpg cyl disp hp drat wt qsec vs am gear carb
-#> <0 rows> (or 0-length row.names)
-
-mtcars[ , 0] # or mtcars[0]
-#> data frame with 0 columns and 32 rows
-
-mtcars[0, 0]
-#> data frame with 0 columns and 0 rows
-```
-
-
-</details>
-
-2. What happens if you attempt to set rownames that are not unique?
-
-<details><summary>Answer(s)</summary>
-Matrices can have duplicated row names, so this does not cause problems.
-
-Data frames, however, require unique rownames and you get different results depending on how you attempt to set them. If you set them directly or via `row.names()`, you get an error:
-
-```{r, eval = FALSE}
-data.frame(row.names = c("x", "y", "y"))
-#> Error in data.frame(row.names = c("x", "y", "y")): duplicate row.names: y
-
-df <- data.frame(x = 1:3)
-row.names(df) <- c("x", "y", "y")
-#> Warning: non-unique value when setting 'row.names': 'y'
-#> Error in `.rowNamesDF<-`(x, value = value): duplicate 'row.names' are not allowed
-```
-
-If you use subsetting, `[` automatically deduplicates:
-
-```{r, eval = FALSE}
-row.names(df) <- c("x", "y", "z")
-df[c(1, 1, 1), , drop = FALSE]
-#> x
-#> x 1
-#> x.1 1
-#> x.2 1
-```
-
-</details>
-
-3. If `df` is a data frame, what can you say about `t(df)`, and `t(t(df))`? Perform some experiments, making sure to try different column types.
-
-<details><summary>Answer(s)</summary>
-Both of `t(df)` and `t(t(df))` will return matrices:
-
-```{r, eval = FALSE}
-df <- data.frame(x = 1:3, y = letters[1:3])
-is.matrix(df)
-#> [1] FALSE
-is.matrix(t(df))
-#> [1] TRUE
-is.matrix(t(t(df)))
-#> [1] TRUE
-```
-
-The dimensions will respect the typical transposition rules:
-
-```{r, eval = FALSE}
-dim(df)
-#> [1] 3 2
-dim(t(df))
-#> [1] 2 3
-dim(t(t(df)))
-#> [1] 3 2
-```
-
-Because the output is a matrix, every column is coerced to the same type. (It is implemented within `t.data.frame()` via `as.matrix()` which is described below).
-
-```{r, eval = FALSE}
-df
-#> x y
-#> 1 1 a
-#> 2 2 b
-#> 3 3 c
-t(df)
-#> [,1] [,2] [,3]
-#> x "1" "2" "3"
-#> y "a" "b" "c"
-```
-
-</details>
-
-4. What does `as.matrix()` do when applied to a data frame with columns of different types? How does it differ from `data.matrix()`?
-
-<details><summary>Answer(s)</summary>
-The type of the result of as.matrix depends on the types of the input columns (see `?as.matrix`):
-
-> The method for data frames will return a character matrix if there is only atomic columns and any non-(numeric/logical/complex) column, applying as.vector to factors and format to other non-character columns. Otherwise the usual coercion hierarchy (logical < integer < double < complex) will be used, e.g. all-logical data frames will be coerced to a logical matrix, mixed logical-integer will give an integer matrix, etc.
-
-On the other hand, `data.matrix` will always return a numeric matrix (see `?data.matrix()`).
-
-> Return the matrix obtained by converting all the variables in a data frame to numeric mode and then binding them together as the columns of a matrix. Factors and ordered factors are replaced by their internal codes. […] Character columns are first converted to factors and then to integers.
-
-We can illustrate and compare the mechanics of these functions using a concrete example. `as.matrix()` makes it possible to retrieve most of the original information from the data frame but leaves us with characters. To retrieve all information from `data.matrix()`’s output, we would need a lookup table for each column.
-
-```{r, eval = FALSE}
-df_coltypes <- data.frame(
- a = c("a", "b"),
- b = c(TRUE, FALSE),
- c = c(1L, 0L),
- d = c(1.5, 2),
- e = factor(c("f1", "f2"))
-)
-
-as.matrix(df_coltypes)
-#> a b c d e
-#> [1,] "a" "TRUE" "1" "1.5" "f1"
-#> [2,] "b" "FALSE" "0" "2.0" "f2"
-data.matrix(df_coltypes)
-#> a b c d e
-#> [1,] 1 1 1 1.5 1
-#> [2,] 2 0 0 2.0 2
-```
-
-</details>
-
-
-
-
-
-
-
-## `NULL`
-
-Special type of object that:
-
-- Length 0
-- Cannot have attributes
-
-```{r null, results = 'hide'}
-typeof(NULL)
-#> [1] "NULL"
-
-length(NULL)
-#> [1] 0
-```
-
-```{r null_attr, error=TRUE}
-x <- NULL
-attr(x, "y") <- 1
-```
-
-```{r null_check}
-is.null(NULL)
-```
-
-
-## Digestif
-
-Let is use some of this chapter's skills on the `penguins` data.
-
-### Attributes
-
-```{r}
-str(penguins_raw)
-```
-
-```{r}
-str(penguins_raw, give.attr = FALSE)
-```
-
-### Data Frames vs Tibbles
-
-```{r}
-penguins_df <- data.frame(penguins)
-penguins_tb <- penguins #i.e. penguins was already a tibble
-```
-
-#### Printing
-
-* Tip: print out these results in RStudio under different editor themes
-
-```{r, eval = FALSE}
-print(penguins_df) #don't run this
-```
-
-```{r}
-head(penguins_df)
-```
-
-```{r}
-penguins_tb
-```
-
-### Atomic Vectors
-
-```{r}
-species_vector_df <- penguins_df |> select(species)
-species_unlist_df <- penguins_df |> select(species) |> unlist()
-species_pull_df <- penguins_df |> select(species) |> pull()
-
-species_vector_tb <- penguins_tb |> select(species)
-species_unlist_tb <- penguins_tb |> select(species) |> unlist()
-species_pull_tb <- penguins_tb |> select(species) |> pull()
-```
-
-<details>
-<summary>`typeof()` and `class()`</summary>
-```{r}
-typeof(species_vector_df)
-class(species_vector_df)
-
-typeof(species_unlist_df)
-class(species_unlist_df)
-
-typeof(species_pull_df)
-class(species_pull_df)
-
-typeof(species_vector_tb)
-class(species_vector_tb)
-
-typeof(species_unlist_tb)
-class(species_unlist_tb)
-
-typeof(species_pull_tb)
-class(species_pull_tb)
-```
-</details>
-
-### Column Names
-
-```{r}
-colnames(penguins_tb)
-```
-
-```{r}
-names(penguins_tb) == colnames(penguins_tb)
-```
-
-```{r}
-names(penguins_df) == names(penguins_tb)
-```
-
-* What if we only invoke a partial name of a column of a tibble?
-
-```{r, error = TRUE}
-penguins_tb$y
-```
-
-
-
-* What if we only invoke a partial name of a column of a data frame?
-
-```{r}
-head(penguins_df$y) #instead of `year`
-```
-
-* Is this evaluation in alphabetical order or column order?
-
-```{r}
-penguins_df_se_sp <- penguins_df |> select(sex, species)
-penguins_df_sp_se <- penguins_df |> select(species, sex)
-```
-
-```{r}
-head(penguins_df_se_sp$s)
-```
-
-```{r}
-head(penguins_df_sp_se$s)
-```
-
-
-## Chapter Quiz
-
-1. What are the four common types of atomic vectors? What are the two rare types?
-
-<details><summary>Answer(s)</summary>
-The four common types of atomic vector are logical, integer, double and character. The two rarer types are complex and raw.
-</details>
-
-2. What are attributes? How do you get them and set them?
-
-<details><summary>Answer(s)</summary>
-Attributes allow you to associate arbitrary additional metadata to any object. You can get and set individual attributes with `attr(x, "y")` and `attr(x, "y") <- value`; or you can get and set all attributes at once with `attributes()`.
-</details>
-
-3. How is a list different from an atomic vector? How is a matrix different from a data frame?
-
-<details><summary>Answer(s)</summary>
-The elements of a list can be any type (even a list); the elements of an atomic vector are all of the same type. Similarly, every element of a matrix must be the same type; in a data frame, different columns can have different types.
-</details>
-
-4. Can you have a list that is a matrix? Can a data frame have a column that is a matrix?
-
-<details><summary>Answer(s)</summary>
-You can make a list-array by assigning dimensions to a list. You can make a matrix a column of a data frame with `df$x <- matrix()`, or by using `I()` when creating a new data frame `data.frame(x = I(matrix()))`.
-</details>
-
-5. How do tibbles behave differently from data frames?
-
-<details><summary>Answer(s)</summary>
-Tibbles have an enhanced print method, never coerce strings to factors, and provide stricter subsetting methods.
-</details>
-
-
-
-
-
-
-
-
-
-
-
-
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/pQ-xDAPEQaw")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/CpLM6SdpTFY")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/9E4RlbW8vxU")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/LCAgxwm5Ydg")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/DrVY6DE9ymY")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/mmcnkIjANps")`
-
-<details>
-<summary>Meeting chat log</summary>
-
-```
-00:10:18 Oluwafemi Oyedele: Hi, good evening
-00:23:31 Federica Gazzelloni: Hi Kiante!
-00:24:21 Federica Gazzelloni: Thanks Arthur
-00:25:46 Trevin: Welcome Matt!
-00:26:02 Matt Dupree: hello! thank you!
-00:30:34 Federica Gazzelloni: Hello Matt!
-00:30:46 Matt Dupree: hello!
-00:38:24 Ryan Metcalf: `rlang::cpl()` = “complex”. For example `0+1i`
-00:55:37 Trevin: > two <- c(1,2,3)
-> names(two) <- c("one", "two")
-> two
- one two <NA>
- 1 2 3
-00:57:25 Ryan Metcalf: Excellent Trevin. You beat me to the output! Assuming we didn't supply the string, `NA` is entered instead.
-01:08:50 Ryan Metcalf: Without further research, this is the "Unix Epoch”. However, varying operating systems use different Epochs.
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/QcdByYHo1ms")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:54:07 Ron: https://www.tidyverse.org/blog/2021/03/clock-0-1-0/
-01:14:39 Robert Hilly: https://www.amazon.com/Effective-Pandas-Patterns-Manipulation-Treading/dp/B09MYXXSFM
-```
-</details>
diff --git a/slides/04.Rmd b/slides/04.Rmd
@@ -0,0 +1,583 @@
+---
+engine: knitr
+title: Subsetting
+---
+
+## Learning objectives:
+
+- Learn about the 6 ways to subset atomic vectors
+- Learn about the 3 subsetting operators: `[[`, `[`, and `$`
+- Learn how subsetting works with different vector types
+- Learn how subsetting can be combined with assignment
+
+## Selecting multiple elements
+
+### Atomic Vectors
+
+- 6 ways to subset atomic vectors
+
+Let's take a look with an example vector.
+
+```{r atomic_vector}
+x <- c(1.1, 2.2, 3.3, 4.4)
+```
+
+**Positive integer indices**
+
+```{r positive_int}
+# return elements at specified positions which can be out of order
+x[c(4, 1)]
+
+# duplicate indices return duplicate values
+x[c(2, 2)]
+
+# real numbers truncate to integers
+# so this behaves as if it is x[c(3, 3)]
+x[c(3.2, 3.8)]
+```
+
+**Negative integer indices**
+
+```{r, error=TRUE}
+### excludes elements at specified positions
+x[-c(1, 3)] # same as x[c(-1, -3)] or x[c(2, 4)]
+
+### mixing positive and negative is a no-no
+x[c(-1, 3)]
+```
+
+**Logical Vectors**
+
+```{r logical_vec}
+x[c(TRUE, TRUE, FALSE, TRUE)]
+
+x[x < 3]
+
+cond <- x > 2.5
+x[cond]
+```
+
+- **Recyling rules** applies when the two vectors are of different lengths
+- the shorter of the two is recycled to the length of the longer
+- Easy to understand if x or y is 1, best to avoid other lengths
+
+```{r}
+x[c(F, T)] # equivalent to: x[c(FALSE, TRUE, FALSE, TRUE)]
+```
+
+**Missing values (NA)**
+
+```{r missing}
+# Missing values in index will also return NA in output
+x[c(NA, TRUE)]
+```
+
+**Nothing**
+
+```{r nothing}
+# returns the original vector
+x[]
+```
+
+**Zero**
+
+```{r zero}
+# returns a zero-length vector
+x[0]
+```
+
+**Character vectors**
+
+```{r character}
+# if name, you can use to return matched elements
+(y <- setNames(x, letters[1:4]))
+
+y[c("d", "b", "a")]
+
+# Like integer indices, you can repeat indices
+y[c("a", "a", "a")]
+
+# When subsetting with [, names are always matched exactly
+z <- c(abc = 1, def = 2)
+z
+z[c("a", "d")]
+```
+
+### Lists
+
+- Subsetting works the same way
+- `[` always returns a list
+- `[[` and `$` let you pull elements out of a list
+
+```{r}
+my_list <- list(a = c(T, F), b = letters[5:15], c = 100:108)
+my_list
+```
+
+**Return a (named) list**
+
+```{r}
+l1 <- my_list[2]
+l1
+```
+
+**Return a vector**
+
+```{r}
+l2 <- my_list[[2]]
+l2
+l2b <- my_list$b
+l2b
+```
+
+**Return a specific element**
+
+```{r}
+l3 <- my_list[[2]][3]
+l3
+l4 <- my_list[['b']][3]
+l4
+l4b <- my_list$b[3]
+l4b
+```
+
+**Visual Representation**
+
+
+
+See this stackoverflow article for more detailed information about the differences: https://stackoverflow.com/questions/1169456/the-difference-between-bracket-and-double-bracket-for-accessing-the-el
+
+### Matrices and arrays
+
+You can subset higher dimensional structures in three ways:
+
+- with multiple vectors
+- with a single vector
+- with a matrix
+
+```{r}
+a <- matrix(1:12, nrow = 3)
+colnames(a) <- c("A", "B", "C", "D")
+
+# single row
+a[1, ]
+
+# single column
+a[, 1]
+
+# single element
+a[1, 1]
+
+# two rows from two columns
+a[1:2, 3:4]
+
+a[c(TRUE, FALSE, TRUE), c("B", "A")]
+
+# zero index and negative index
+a[0, -2]
+```
+
+**Subset a matrix with a matrix**
+
+```{r}
+b <- matrix(1:4, nrow = 2)
+b
+a[b]
+```
+
+```{r}
+vals <- outer(1:5, 1:5, FUN = "paste", sep = ",")
+vals
+
+select <- matrix(ncol = 2, byrow = TRUE,
+ c(1, 1,
+ 3, 1,
+ 2, 4))
+select
+
+vals[select]
+```
+
+Matrices and arrays are just special vectors; can subset with a single vector
+(arrays in R stored column wise)
+
+```{r}
+vals[c(3, 15, 16, 17)]
+```
+
+### Data frames and tibbles
+
+Data frames act like both lists and matrices
+
+- When subsetting with a single index, they behave like lists and index the columns, so `df[1:2]` selects the first two columns.
+- When subsetting with two indices, they behave like matrices, so `df[1:3, ]` selects the first three rows (and all the columns).
+
+```{r penguins, error=TRUE}
+library(palmerpenguins)
+penguins <- penguins
+
+# single index selects first two columns
+two_cols <- penguins[2:3] # or penguins[c(2,3)]
+head(two_cols)
+
+# equivalent to the above code
+same_two_cols <- penguins[c("island", "bill_length_mm")]
+head(same_two_cols)
+
+# two indices separated by comma (first two rows of 3rd and 4th columns)
+penguins[1:2, 3:4]
+
+# Can't do this...
+penguins[[3:4]][c(1:4)]
+# ...but this works...
+penguins[[3]][c(1:4)]
+# ...or this equivalent...
+penguins$bill_length_mm[1:4]
+```
+
+Subsetting a tibble with `[` always returns a tibble
+
+### Preserving dimensionality
+
+- Data frames and tibbles behave differently
+- tibble will default to preserve dimensionality, data frames do not
+- this can lead to unexpected behavior and code breaking in the future
+- Use `drop = FALSE` to preserve dimensionality when subsetting a data frame or use tibbles
+
+
+```{r}
+tb <- tibble::tibble(a = 1:2, b = 1:2)
+
+# returns tibble
+str(tb[, "a"])
+tb[, "a"] # equivalent to tb[, "a", drop = FALSE]
+
+# returns integer vector
+# str(tb[, "a", drop = TRUE])
+tb[, "a", drop = TRUE]
+```
+
+```{r}
+df <- data.frame(a = 1:2, b = 1:2)
+
+# returns integer vector
+# str(df[, "a"])
+df[, "a"]
+
+# returns data frame with one column
+# str(df[, "a", drop = FALSE])
+df[, "a", drop = FALSE]
+```
+**Factors**
+
+Factor subsetting drop argument controls whether or not levels (rather than dimensions) are preserved.
+
+```{r}
+z <- factor(c("a", "b", "c"))
+z[1]
+z[1, drop = TRUE]
+```
+
+## Selecting a single element
+
+`[[` and `$` are used to extract single elements (note: a vector can be a single element)
+
+### `[[]]`
+
+Because `[[]]` can return only a single item, you must use it with either a single positive integer or a single string.
+
+```{r train}
+x <- list(1:3, "a", 4:6)
+x[[1]]
+```
+
+Hadley Wickham recommends using `[[]]` with atomic vectors whenever you want to extract a single value to reinforce the expectation that you are getting and setting individual values.
+
+### `$`
+
+- `x$y` is equivalent to `x[["y"]]`
+
+the `$` operator doesn't work with stored vals
+
+```{r}
+var <- "cyl"
+
+# Doesn't work - mtcars$var translated to mtcars[["var"]]
+mtcars$var
+
+# Instead use [[
+mtcars[[var]]
+```
+
+`$` allows partial matching, `[[]]` does not
+
+```{r}
+x <- list(abc = 1)
+x$a
+
+x[["a"]]
+
+```
+
+Hadley advises to change Global settings:
+
+```{r}
+options(warnPartialMatchDollar = TRUE)
+x$a
+```
+
+tibbles don't have this behavior
+
+```{r}
+penguins$s
+```
+
+### missing and out of bound indices
+
+- Due to the inconsistency of how R handles such indices, `purrr::pluck()` and `purrr::chuck()` are recommended
+
+```{r, eval=FALSE}
+x <- list(
+ a = list(1, 2, 3),
+ b = list(3, 4, 5)
+)
+purrr::pluck(x, "a", 1)
+# [1] 1
+purrr::pluck(x, "c", 1)
+# NULL
+purrr::pluck(x, "c", 1, .default = NA)
+# [1] NA
+```
+
+### `@` and `slot()`
+- `@` is `$` for S4 objects (to be revisited in Chapter 15)
+
+- `slot()` is `[[ ]]` for S4 objects
+
+## Subsetting and Assignment
+
+- Subsetting can be combined with assignment to edit values
+
+```{r}
+x <- c("Tigers", "Royals", "White Sox", "Twins", "Indians")
+
+x[5] <- "Guardians"
+
+x
+```
+
+- length of the subset and assignment vector should be the same to avoid recycling
+
+You can use NULL to remove a component
+
+```{r}
+x <- list(a = 1, b = 2)
+x[["b"]] <- NULL
+str(x)
+```
+
+Subsetting with nothing can preserve structure of original object
+
+```{r, eval=FALSE}
+# mtcars[] <- lapply(mtcars, as.integer)
+# is.data.frame(mtcars)
+# [1] TRUE
+# mtcars <- lapply(mtcars, as.integer)
+#> is.data.frame(mtcars)
+# [1] FALSE
+```
+
+## Applications
+
+Applications copied from cohort 2 slide
+
+### Lookup tables (character subsetting)
+
+```{r, eval=FALSE}
+x <- c("m", "f", "u", "f", "f", "m", "m")
+lookup <- c(m = "Male", f = "Female", u = NA)
+lookup[x]
+# m f u f f m m
+# "Male" "Female" NA "Female" "Female" "Male" "Male"
+```
+
+### Matching and merging by hand (integer subsetting)
+
+- The `match()` function allows merging a vector with a table
+
+```{r, eval=FALSE}
+grades <- c("D", "A", "C", "B", "F")
+info <- data.frame(
+ grade = c("A", "B", "C", "D", "F"),
+ desc = c("Excellent", "Very Good", "Average", "Fair", "Poor"),
+ fail = c(F, F, F, F, T)
+)
+id <- match(grades, info$grade)
+id
+# [1] 3 2 2 1 3
+info[id, ]
+# grade desc fail
+# 4 D Fair FALSE
+# 1 A Excellent FALSE
+# 3 C Average FALSE
+# 2 B Very Good FALSE
+# 5 F Poor TRUE
+```
+
+### Random samples and bootstrapping (integer subsetting)
+
+```{r, eval=FALSE}
+# mtcars[sample(nrow(mtcars), 3), ] # use replace = TRUE to replace
+# mpg cyl disp hp drat wt qsec vs am gear carb
+# Lotus Europa 30.4 4 95.1 113 3.77 1.513 16.90 1 1 5 2
+# Mazda RX4 21.0 6 160.0 110 3.90 2.620 16.46 0 1 4 4
+# Cadillac Fleetwood 10.4 8 472.0 205 2.93 5.250 17.98 0 0 3 4
+```
+
+### Ordering (integer subsetting)
+
+```{r, eval=FALSE}
+# mtcars[order(mtcars$mpg), ]
+# mpg cyl disp hp drat wt qsec vs am gear carb
+# Cadillac Fleetwood 10.4 8 472.0 205 2.93 5.250 17.98 0 0 3 4
+# Lincoln Continental 10.4 8 460.0 215 3.00 5.424 17.82 0 0 3 4
+# Camaro Z28 13.3 8 350.0 245 3.73 3.840 15.41 0 0 3 4
+# Duster 360 14.3 8 360.0 245 3.21 3.570 15.84 0 0 3 4
+# Chrysler Imperial 14.7 8 440.0 230 3.23 5.345 17.42 0 0 3 4
+# Maserati Bora 15.0 8 301.0 335 3.54 3.570 14.60 0 1 5 8
+# ...
+```
+
+### Expanding aggregated counts (integer subsetting)
+
+- We can expand a count column by using `rep()`
+
+```{r, eval=FALSE}
+df <- tibble::tibble(x = c("Amy", "Julie", "Brian"), n = c(2, 1, 3))
+df[rep(1:nrow(df), df$n), ]
+# A tibble: 6 x 2
+# x n
+# <chr> <dbl>
+# 1 Amy 2
+# 2 Amy 2
+# 3 Julie 1
+# 4 Brian 3
+# 5 Brian 3
+# 6 Brian 3
+```
+
+### Removing columns from data frames (character)
+
+- We can remove a column by subsetting, which does not change the object
+
+```{r, eval=FALSE}
+df[, 1]
+# A tibble: 3 x 1
+# x
+# <chr>
+# 1 Amy
+# 2 Julie
+# 3 Brian
+```
+
+- We can also delete the column using `NULL`
+
+```{r, eval=FALSE}
+df$n <- NULL
+df
+# A tibble: 3 x 1
+# x
+# <chr>
+# 1 Amy
+# 2 Julie
+# 3 Brian
+```
+
+### Selecting rows based on a condition (logical subsetting)
+
+```{r, eval=FALSE}
+# mtcars[mtcars$gear == 5, ]
+# mpg cyl disp hp drat wt qsec vs am gear carb
+# Porsche 914-2 26.0 4 120.3 91 4.43 2.140 16.7 0 1 5 2
+# Lotus Europa 30.4 4 95.1 113 3.77 1.513 16.9 1 1 5 2
+# Ford Pantera L 15.8 8 351.0 264 4.22 3.170 14.5 0 1 5 4
+# Ferrari Dino 19.7 6 145.0 175 3.62 2.770 15.5 0 1 5 6
+# Maserati Bora 15.0 8 301.0 335 3.54 3.570 14.6 0 1 5 8
+```
+
+### Boolean algebra versus sets (logical and integer)
+
+- `which()` gives the indices of a Boolean vector
+
+```{r, eval=FALSE}
+(x1 <- 1:10 %% 2 == 0) # 1-10 divisible by 2
+# [1] FALSE TRUE FALSE TRUE FALSE TRUE FALSE TRUE FALSE TRUE
+(x2 <- which(x1))
+# [1] 2 4 6 8 10
+(y1 <- 1:10 %% 5 == 0) # 1-10 divisible by 5
+# [1] FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE TRUE
+(y2 <- which(y1))
+# [1] 5 10
+x1 & y1
+# [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE
+```
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/eLMpCc0t1cg")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/Mhq-TX4eA64")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/CvvXkXiF3Ig")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/Hxghhpe9fYs")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/qtUgKhw39Yo")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/-WjBA6yqW0Q")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:36:02 Arthur Shaw: TIL that the subset operator has parameters. Thanks, Trevin!
+00:38:55 Vaibhav Janve: its interesting that carriage "a" has two set of wheels instread of 4. I wonder that choice is because its atomic.
+00:40:44 Arthur Shaw: @Vaibhav, because the load is lighter, the carriage needs fewer axles? ;) I agree: it's a confusing graphical choice.
+00:41:11 Vaibhav Janve: lol
+01:05:53 Vaibhav Janve: Thank you Trevin!
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/LBU-Ew_IM7A")`
+
+`r knitr::include_url("https://www.youtube.com/embed/W9CoQ15NlOc")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:40:18 Ryan Honomichl: What type of vector does each of the following calls to ifelse() return?
+
+* "ifelse returns a value with the same shape as test which is filled with elements selected from either yes or no depending on whether the element of test is TRUE or FALSE."
+00:42:11 Ryan Honomichl: "I recommend assigning the results of an if statement only when the entire expression fits on one line; otherwise it tends to be hard to read"
+00:42:46 Ryan Honomichl: * When you use the single argument form without an `else` statement, `if` invisibly returns NULL if the condition is FALSE.
+
+- Since functions like c() and paste() drop NULL inputs, this allows for a compact expression of certain idioms
+00:54:15 collinberke: https://docs.google.com/spreadsheets/d/1ScrbEw_-vB9DruaJhjtVY8HLQmuNPqyWeOOjmG6OY1M/edit?usp=sharing
+00:58:46 collinberke: https://www.youtube.com/@safe4democracy/videos
+```
+</details>
diff --git a/slides/04_Subsetting.Rmd b/slides/04_Subsetting.Rmd
@@ -1,580 +0,0 @@
-# Subsetting
-
-**Learning objectives:**
-
-- Learn about the 6 ways to subset atomic vectors
-- Learn about the 3 subsetting operators: `[[`, `[`, and `$`
-- Learn how subsetting works with different vector types
-- Learn how subsetting can be combined with assignment
-
-## Selecting multiple elements
-
-### Atomic Vectors
-
-- 6 ways to subset atomic vectors
-
-Let's take a look with an example vector.
-
-```{r atomic_vector}
-x <- c(1.1, 2.2, 3.3, 4.4)
-```
-
-**Positive integer indices**
-
-```{r positive_int}
-# return elements at specified positions which can be out of order
-x[c(4, 1)]
-
-# duplicate indices return duplicate values
-x[c(2, 2)]
-
-# real numbers truncate to integers
-# so this behaves as if it is x[c(3, 3)]
-x[c(3.2, 3.8)]
-```
-
-**Negative integer indices**
-
-```{r, error=TRUE}
-### excludes elements at specified positions
-x[-c(1, 3)] # same as x[c(-1, -3)] or x[c(2, 4)]
-
-### mixing positive and negative is a no-no
-x[c(-1, 3)]
-```
-
-**Logical Vectors**
-
-```{r logical_vec}
-x[c(TRUE, TRUE, FALSE, TRUE)]
-
-x[x < 3]
-
-cond <- x > 2.5
-x[cond]
-```
-
-- **Recyling rules** applies when the two vectors are of different lengths
-- the shorter of the two is recycled to the length of the longer
-- Easy to understand if x or y is 1, best to avoid other lengths
-
-```{r}
-x[c(F, T)] # equivalent to: x[c(FALSE, TRUE, FALSE, TRUE)]
-```
-
-**Missing values (NA)**
-
-```{r missing}
-# Missing values in index will also return NA in output
-x[c(NA, TRUE)]
-```
-
-**Nothing**
-
-```{r nothing}
-# returns the original vector
-x[]
-```
-
-**Zero**
-
-```{r zero}
-# returns a zero-length vector
-x[0]
-```
-
-**Character vectors**
-
-```{r character}
-# if name, you can use to return matched elements
-(y <- setNames(x, letters[1:4]))
-
-y[c("d", "b", "a")]
-
-# Like integer indices, you can repeat indices
-y[c("a", "a", "a")]
-
-# When subsetting with [, names are always matched exactly
-z <- c(abc = 1, def = 2)
-z
-z[c("a", "d")]
-```
-
-### Lists
-
-- Subsetting works the same way
-- `[` always returns a list
-- `[[` and `$` let you pull elements out of a list
-
-```{r}
-my_list <- list(a = c(T, F), b = letters[5:15], c = 100:108)
-my_list
-```
-
-**Return a (named) list**
-
-```{r}
-l1 <- my_list[2]
-l1
-```
-
-**Return a vector**
-
-```{r}
-l2 <- my_list[[2]]
-l2
-l2b <- my_list$b
-l2b
-```
-
-**Return a specific element**
-
-```{r}
-l3 <- my_list[[2]][3]
-l3
-l4 <- my_list[['b']][3]
-l4
-l4b <- my_list$b[3]
-l4b
-```
-
-**Visual Representation**
-
-
-
-See this stackoverflow article for more detailed information about the differences: https://stackoverflow.com/questions/1169456/the-difference-between-bracket-and-double-bracket-for-accessing-the-el
-
-### Matrices and arrays
-
-You can subset higher dimensional structures in three ways:
-
-- with multiple vectors
-- with a single vector
-- with a matrix
-
-```{r}
-a <- matrix(1:12, nrow = 3)
-colnames(a) <- c("A", "B", "C", "D")
-
-# single row
-a[1, ]
-
-# single column
-a[, 1]
-
-# single element
-a[1, 1]
-
-# two rows from two columns
-a[1:2, 3:4]
-
-a[c(TRUE, FALSE, TRUE), c("B", "A")]
-
-# zero index and negative index
-a[0, -2]
-```
-
-**Subset a matrix with a matrix**
-
-```{r}
-b <- matrix(1:4, nrow = 2)
-b
-a[b]
-```
-
-```{r}
-vals <- outer(1:5, 1:5, FUN = "paste", sep = ",")
-vals
-
-select <- matrix(ncol = 2, byrow = TRUE,
- c(1, 1,
- 3, 1,
- 2, 4))
-select
-
-vals[select]
-```
-
-Matrices and arrays are just special vectors; can subset with a single vector
-(arrays in R stored column wise)
-
-```{r}
-vals[c(3, 15, 16, 17)]
-```
-
-### Data frames and tibbles
-
-Data frames act like both lists and matrices
-
-- When subsetting with a single index, they behave like lists and index the columns, so `df[1:2]` selects the first two columns.
-- When subsetting with two indices, they behave like matrices, so `df[1:3, ]` selects the first three rows (and all the columns).
-
-```{r penguins, error=TRUE}
-library(palmerpenguins)
-penguins <- penguins
-
-# single index selects first two columns
-two_cols <- penguins[2:3] # or penguins[c(2,3)]
-head(two_cols)
-
-# equivalent to the above code
-same_two_cols <- penguins[c("island", "bill_length_mm")]
-head(same_two_cols)
-
-# two indices separated by comma (first two rows of 3rd and 4th columns)
-penguins[1:2, 3:4]
-
-# Can't do this...
-penguins[[3:4]][c(1:4)]
-# ...but this works...
-penguins[[3]][c(1:4)]
-# ...or this equivalent...
-penguins$bill_length_mm[1:4]
-```
-
-Subsetting a tibble with `[` always returns a tibble
-
-### Preserving dimensionality
-
-- Data frames and tibbles behave differently
-- tibble will default to preserve dimensionality, data frames do not
-- this can lead to unexpected behavior and code breaking in the future
-- Use `drop = FALSE` to preserve dimensionality when subsetting a data frame or use tibbles
-
-
-```{r}
-tb <- tibble::tibble(a = 1:2, b = 1:2)
-
-# returns tibble
-str(tb[, "a"])
-tb[, "a"] # equivalent to tb[, "a", drop = FALSE]
-
-# returns integer vector
-# str(tb[, "a", drop = TRUE])
-tb[, "a", drop = TRUE]
-```
-
-```{r}
-df <- data.frame(a = 1:2, b = 1:2)
-
-# returns integer vector
-# str(df[, "a"])
-df[, "a"]
-
-# returns data frame with one column
-# str(df[, "a", drop = FALSE])
-df[, "a", drop = FALSE]
-```
-**Factors**
-
-Factor subsetting drop argument controls whether or not levels (rather than dimensions) are preserved.
-
-```{r}
-z <- factor(c("a", "b", "c"))
-z[1]
-z[1, drop = TRUE]
-```
-
-## Selecting a single element
-
-`[[` and `$` are used to extract single elements (note: a vector can be a single element)
-
-### `[[]]`
-
-Because `[[]]` can return only a single item, you must use it with either a single positive integer or a single string.
-
-```{r train}
-x <- list(1:3, "a", 4:6)
-x[[1]]
-```
-
-Hadley Wickham recommends using `[[]]` with atomic vectors whenever you want to extract a single value to reinforce the expectation that you are getting and setting individual values.
-
-### `$`
-
-- `x$y` is equivalent to `x[["y"]]`
-
-the `$` operator doesn't work with stored vals
-
-```{r}
-var <- "cyl"
-
-# Doesn't work - mtcars$var translated to mtcars[["var"]]
-mtcars$var
-
-# Instead use [[
-mtcars[[var]]
-```
-
-`$` allows partial matching, `[[]]` does not
-
-```{r}
-x <- list(abc = 1)
-x$a
-
-x[["a"]]
-
-```
-
-Hadley advises to change Global settings:
-
-```{r}
-options(warnPartialMatchDollar = TRUE)
-x$a
-```
-
-tibbles don't have this behavior
-
-```{r}
-penguins$s
-```
-
-### missing and out of bound indices
-
-- Due to the inconsistency of how R handles such indices, `purrr::pluck()` and `purrr::chuck()` are recommended
-
-```{r, eval=FALSE}
-x <- list(
- a = list(1, 2, 3),
- b = list(3, 4, 5)
-)
-purrr::pluck(x, "a", 1)
-# [1] 1
-purrr::pluck(x, "c", 1)
-# NULL
-purrr::pluck(x, "c", 1, .default = NA)
-# [1] NA
-```
-
-### `@` and `slot()`
-- `@` is `$` for S4 objects (to be revisited in Chapter 15)
-
-- `slot()` is `[[ ]]` for S4 objects
-
-## Subsetting and Assignment
-
-- Subsetting can be combined with assignment to edit values
-
-```{r}
-x <- c("Tigers", "Royals", "White Sox", "Twins", "Indians")
-
-x[5] <- "Guardians"
-
-x
-```
-
-- length of the subset and assignment vector should be the same to avoid recycling
-
-You can use NULL to remove a component
-
-```{r}
-x <- list(a = 1, b = 2)
-x[["b"]] <- NULL
-str(x)
-```
-
-Subsetting with nothing can preserve structure of original object
-
-```{r, eval=FALSE}
-# mtcars[] <- lapply(mtcars, as.integer)
-# is.data.frame(mtcars)
-# [1] TRUE
-# mtcars <- lapply(mtcars, as.integer)
-#> is.data.frame(mtcars)
-# [1] FALSE
-```
-
-## Applications
-
-Applications copied from cohort 2 slide
-
-### Lookup tables (character subsetting)
-
-```{r, eval=FALSE}
-x <- c("m", "f", "u", "f", "f", "m", "m")
-lookup <- c(m = "Male", f = "Female", u = NA)
-lookup[x]
-# m f u f f m m
-# "Male" "Female" NA "Female" "Female" "Male" "Male"
-```
-
-### Matching and merging by hand (integer subsetting)
-
-- The `match()` function allows merging a vector with a table
-
-```{r, eval=FALSE}
-grades <- c("D", "A", "C", "B", "F")
-info <- data.frame(
- grade = c("A", "B", "C", "D", "F"),
- desc = c("Excellent", "Very Good", "Average", "Fair", "Poor"),
- fail = c(F, F, F, F, T)
-)
-id <- match(grades, info$grade)
-id
-# [1] 3 2 2 1 3
-info[id, ]
-# grade desc fail
-# 4 D Fair FALSE
-# 1 A Excellent FALSE
-# 3 C Average FALSE
-# 2 B Very Good FALSE
-# 5 F Poor TRUE
-```
-
-### Random samples and bootstrapping (integer subsetting)
-
-```{r, eval=FALSE}
-# mtcars[sample(nrow(mtcars), 3), ] # use replace = TRUE to replace
-# mpg cyl disp hp drat wt qsec vs am gear carb
-# Lotus Europa 30.4 4 95.1 113 3.77 1.513 16.90 1 1 5 2
-# Mazda RX4 21.0 6 160.0 110 3.90 2.620 16.46 0 1 4 4
-# Cadillac Fleetwood 10.4 8 472.0 205 2.93 5.250 17.98 0 0 3 4
-```
-
-### Ordering (integer subsetting)
-
-```{r, eval=FALSE}
-# mtcars[order(mtcars$mpg), ]
-# mpg cyl disp hp drat wt qsec vs am gear carb
-# Cadillac Fleetwood 10.4 8 472.0 205 2.93 5.250 17.98 0 0 3 4
-# Lincoln Continental 10.4 8 460.0 215 3.00 5.424 17.82 0 0 3 4
-# Camaro Z28 13.3 8 350.0 245 3.73 3.840 15.41 0 0 3 4
-# Duster 360 14.3 8 360.0 245 3.21 3.570 15.84 0 0 3 4
-# Chrysler Imperial 14.7 8 440.0 230 3.23 5.345 17.42 0 0 3 4
-# Maserati Bora 15.0 8 301.0 335 3.54 3.570 14.60 0 1 5 8
-# ...
-```
-
-### Expanding aggregated counts (integer subsetting)
-
-- We can expand a count column by using `rep()`
-
-```{r, eval=FALSE}
-df <- tibble::tibble(x = c("Amy", "Julie", "Brian"), n = c(2, 1, 3))
-df[rep(1:nrow(df), df$n), ]
-# A tibble: 6 x 2
-# x n
-# <chr> <dbl>
-# 1 Amy 2
-# 2 Amy 2
-# 3 Julie 1
-# 4 Brian 3
-# 5 Brian 3
-# 6 Brian 3
-```
-
-### Removing columns from data frames (character)
-
-- We can remove a column by subsetting, which does not change the object
-
-```{r, eval=FALSE}
-df[, 1]
-# A tibble: 3 x 1
-# x
-# <chr>
-# 1 Amy
-# 2 Julie
-# 3 Brian
-```
-
-- We can also delete the column using `NULL`
-
-```{r, eval=FALSE}
-df$n <- NULL
-df
-# A tibble: 3 x 1
-# x
-# <chr>
-# 1 Amy
-# 2 Julie
-# 3 Brian
-```
-
-### Selecting rows based on a condition (logical subsetting)
-
-```{r, eval=FALSE}
-# mtcars[mtcars$gear == 5, ]
-# mpg cyl disp hp drat wt qsec vs am gear carb
-# Porsche 914-2 26.0 4 120.3 91 4.43 2.140 16.7 0 1 5 2
-# Lotus Europa 30.4 4 95.1 113 3.77 1.513 16.9 1 1 5 2
-# Ford Pantera L 15.8 8 351.0 264 4.22 3.170 14.5 0 1 5 4
-# Ferrari Dino 19.7 6 145.0 175 3.62 2.770 15.5 0 1 5 6
-# Maserati Bora 15.0 8 301.0 335 3.54 3.570 14.6 0 1 5 8
-```
-
-### Boolean algebra versus sets (logical and integer)
-
-- `which()` gives the indices of a Boolean vector
-
-```{r, eval=FALSE}
-(x1 <- 1:10 %% 2 == 0) # 1-10 divisible by 2
-# [1] FALSE TRUE FALSE TRUE FALSE TRUE FALSE TRUE FALSE TRUE
-(x2 <- which(x1))
-# [1] 2 4 6 8 10
-(y1 <- 1:10 %% 5 == 0) # 1-10 divisible by 5
-# [1] FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE TRUE
-(y2 <- which(y1))
-# [1] 5 10
-x1 & y1
-# [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE
-```
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/eLMpCc0t1cg")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/Mhq-TX4eA64")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/CvvXkXiF3Ig")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/Hxghhpe9fYs")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/qtUgKhw39Yo")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/-WjBA6yqW0Q")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:36:02 Arthur Shaw: TIL that the subset operator has parameters. Thanks, Trevin!
-00:38:55 Vaibhav Janve: its interesting that carriage "a" has two set of wheels instread of 4. I wonder that choice is because its atomic.
-00:40:44 Arthur Shaw: @Vaibhav, because the load is lighter, the carriage needs fewer axles? ;) I agree: it's a confusing graphical choice.
-00:41:11 Vaibhav Janve: lol
-01:05:53 Vaibhav Janve: Thank you Trevin!
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/LBU-Ew_IM7A")`
-
-`r knitr::include_url("https://www.youtube.com/embed/W9CoQ15NlOc")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:40:18 Ryan Honomichl: What type of vector does each of the following calls to ifelse() return?
-
-* "ifelse returns a value with the same shape as test which is filled with elements selected from either yes or no depending on whether the element of test is TRUE or FALSE."
-00:42:11 Ryan Honomichl: "I recommend assigning the results of an if statement only when the entire expression fits on one line; otherwise it tends to be hard to read"
-00:42:46 Ryan Honomichl: * When you use the single argument form without an `else` statement, `if` invisibly returns NULL if the condition is FALSE.
-
-- Since functions like c() and paste() drop NULL inputs, this allows for a compact expression of certain idioms
-00:54:15 collinberke: https://docs.google.com/spreadsheets/d/1ScrbEw_-vB9DruaJhjtVY8HLQmuNPqyWeOOjmG6OY1M/edit?usp=sharing
-00:58:46 collinberke: https://www.youtube.com/@safe4democracy/videos
-```
-</details>
diff --git a/slides/05.Rmd b/slides/05.Rmd
@@ -0,0 +1,490 @@
+---
+engine: knitr
+title: Control flow
+---
+
+## Learning objectives:
+
+- Learn the **tools** for controlling flow of execution.
+
+- Learn some technical pitfalls and (perhaps lesser known) useful features.
+
+```{r echo = FALSE, fig.align = 'left', fig.dim = '100%'}
+knitr::include_graphics("images/whatif2.png")
+```
+```{r echo = FALSE, fig.align = 'right', fig.dim = '100%'}
+knitr::include_graphics("images/forloop.png")
+```
+
+---
+
+## Introduction
+
+There are two main groups of flow control tools: **choices** and **loops**:
+
+- Choices (`if`, `switch`, `ifelse`, `dplyr::if_else`, `dplyr::case_when`) allow you to run different code depending on the input.
+
+- Loops (`for`, `while`, `repeat`) allow you to repeatedly run code
+
+
+---
+
+
+## Choices
+
+
+
+`if()` and `else`
+
+Use `if` to specify a block of code to be executed, if a specified condition is true. Use `else` to specify a block of code to be executed, if the same condition is false.
+
+```{r, eval=FALSE}
+if (condition) true_action
+if (condition) true_action else false_action
+```
+
+(Note braces are only *needed* for compound expressions)
+
+```{r eval=FALSE, include=T}
+if (test_expression) {
+ true_action
+} else {
+ false_action
+}
+```
+
+
+Can be expanded to more alternatives:
+
+```{r, eval=FALSE}
+if (test_expression) {
+ true_action
+} else if (other_test_expression) {
+ other_action
+} else {
+ false_action
+}
+```
+
+
+## Exercise {-}
+Why does this work?
+```
+x <- 1:10
+if (length(x)) "not empty" else "empty"
+#> [1] "not empty"
+
+x <- numeric()
+if (length(x)) "not empty" else "empty"
+#> [1] "empty"
+```
+
+`if` returns a value which can be assigned
+
+```{r}
+x1 <- if (TRUE) 1 else 2
+x2 <- if (FALSE) 1 else 2
+
+c(x1, x2)
+```
+
+The book recommends assigning the results of an if statement only when the entire expression fits on one line; otherwise it tends to be hard to read.
+
+
+## Single if without else {-}
+
+When you use the single argument form without an else statement, if invisibly (Section 6.7.2) returns NULL if the condition is FALSE. Since functions like c() and paste() drop NULL inputs, this allows for a compact expression of certain idioms:
+
+```{r, eval=FALSE}
+greet <- function(name, birthday = FALSE) {
+ paste0(
+ "Hi ", name,
+ if (birthday) " and HAPPY BIRTHDAY"
+ )
+}
+greet("Maria", FALSE)
+#> [1] "Hi Maria"
+greet("Jaime", TRUE)
+#> [1] "Hi Jaime and HAPPY BIRTHDAY"
+```
+
+
+
+```{r, eval=FALSE}
+format_lane_text <- function(number){
+
+ paste0(
+ number,
+ " lane",
+ if (number > 1) "s",
+ " of sequencing"
+ )
+}
+
+format_lane_text(1)
+#> [1] "1 lane of sequencing"
+format_lane_text(4)
+#> [1] "4 lanes of sequencing"
+```
+
+
+
+
+## Invalid inputs {-}
+
+- *Condition* must evaluate to a *single* `TRUE` or `FALSE`
+
+A single number gets coerced to a logical type.
+
+```{r, eval=FALSE}
+if (56) 1
+#> [1] 1
+if (0.3) 1
+#> [1] 1
+if (0) 1
+```
+
+If the condition cannot evaluate to a *single* `TRUE` or `FALSE`, an error is (usually) produced.
+
+```{r, eval=FALSE}
+if ("text") 1
+#> Error in if ("text") 1: argument is not interpretable as logical
+if ("true") 1
+#> 1
+if (numeric()) 1
+#> Error in if (numeric()) 1: argument is of length zero
+if (NULL) 1
+#> Error in if (NULL) 1 : argument is of length zero
+if (NA) 1
+#> Error in if (NA) 1: missing value where TRUE/FALSE needed
+```
+
+
+Exception is a logical vector of length greater than 1, which only generates a warning, unless you have `_R_CHECK_LENGTH_1_CONDITION_` set to `TRUE`.
+This seems to have been the default since R-4.2.0
+
+```{r, eval=FALSE}
+if (c(TRUE, FALSE)) 1
+#>Error in if (c(TRUE, FALSE)) 1 : the condition has length > 1
+```
+
+## Vectorized choices {-}
+
+- `ifelse()` is a vectorized version of `if`:
+
+```{r, eval=FALSE}
+x <- 1:10
+ifelse(x %% 5 == 0, "XXX", as.character(x))
+#> [1] "1" "2" "3" "4" "XXX" "6" "7" "8" "9" "XXX"
+
+ifelse(x %% 2 == 0, "even", "odd")
+#> [1] "odd" "even" "odd" "even" "odd" "even" "odd" "even" "odd" "even"
+```
+
+- `dplyr::if_else()`
+
+- Book recommends only using `ifelse()` "only when the yes and no vectors are the same type as it is otherwise hard to predict the output type."
+
+- `dplyr::if_else()` enforces this recommendation.
+
+**For example:**
+
+```{r eval=FALSE, include=T}
+ifelse(c(TRUE,TRUE,FALSE),"a",3)
+#> [1] "a" "a" "3"
+dplyr::if_else(c(TRUE,TRUE,FALSE),"a",3)
+#> Error in `dplyr::if_else()`:
+#> ! `false` must be a character vector, not a double vector.
+```
+
+## Switch {-}
+
+Rather then string together multiple if - else if chains, you can often use `switch`.
+
+
+```{r message=FALSE, warning=FALSE}
+centre <- function(x, type) {
+ switch(type,
+ mean = mean(x),
+ median = median(x),
+ trimmed = mean(x, trim = .1),
+ stop("Invalid `type` value")
+ )
+}
+```
+
+Last component should always throw an error, as unmatched inputs would otherwise invisibly return NULL.
+Book recommends to only use character inputs for `switch()`.
+
+```{r, eval=FALSE}
+vec <- c(1:20,50:55)
+centre(vec, "mean")
+#> [1] 20.19231
+centre(vec, "median")
+#> [1] 13.5
+centre(vec, "trimmed")
+#> [1] 18.77273
+```
+
+```{r, message=FALSE}
+set.seed(123)
+x <- rlnorm(100)
+
+centers <- data.frame(type = c('mean', 'median', 'trimmed'))
+centers$value = sapply(centers$type, \(t){centre(x,t)})
+
+require(ggplot2)
+ggplot(data = data.frame(x), aes(x))+
+ geom_density()+
+ geom_vline(data = centers,
+ mapping = aes(color = type, xintercept = value),
+ linewidth=0.5,linetype="dashed") +
+ xlim(-1,10)+
+ theme_bw()
+```
+
+
+Example from book of "falling through" to next value
+
+```{r}
+legs <- function(x) {
+ switch(x,
+ cow = ,
+ horse = ,
+ dog = 4,
+ human = ,
+ chicken = 2,
+ plant = 0,
+ stop("Unknown input")
+ )
+}
+legs("cow")
+#> [1] 4
+legs("dog")
+#> [1] 4
+```
+
+
+
+
+## Using `dplyr::case_when` {-}
+
+- `case_when` is a more general `if_else` and can be used often in place of multiple chained `if_else` or sapply'ing `switch`.
+
+- It uses a special syntax to allow any number of condition-vector pairs:
+
+```{r message=FALSE, warning=FALSE}
+set.seed(123)
+x <- rlnorm(100)
+
+centers <- data.frame(type = c('mean', 'median', 'trimmed'))
+
+centers$value = dplyr::case_when(
+ centers$type == 'mean' ~ mean(x),
+ centers$type == 'median' ~ median(x),
+ centers$type == 'trimmed' ~ mean(x, trim = 0.1),
+ .default = 1000
+ )
+
+centers
+```
+
+
+
+## Loops
+
+- Iteration over a elements of a vector
+
+`for (item in vector) perform_action`
+
+**First example**
+```{r}
+for(i in 1:5) {
+ print(1:i)
+}
+
+x <- numeric(length=5L)
+df <- data.frame(x=1:5)
+
+for(i in 1:5) {
+ df$y[[i]] <- i+1
+}
+```
+
+
+**Second example**: terminate a *for loop* earlier
+
+- `next` skips rest of current iteration
+- `break` exits the loop entirely
+
+```{r}
+for (i in 1:10) {
+ if (i < 3)
+ next
+
+ print(i)
+
+ if (i >= 5)
+ break
+}
+```
+
+## Exercise {-}
+
+When the following code is evaluated, what can you say about the vector being iterated?
+```
+xs <- c(1, 2, 3)
+for (x in xs) {
+ xs <- c(xs, x * 2)
+}
+xs
+#> [1] 1 2 3 2 4 6
+```
+
+## Pitfalls {-}
+
+- Preallocate output containers to avoid *slow* code.
+
+- Beware that `1:length(v)` when `v` has length 0 results in a iterating backwards over `1:0`, probably not what is intended. Use `seq_along(v)` instead.
+
+- When iterating over S3 vectors, use `[[]]` yourself to avoid stripping attributes.
+
+```
+xs <- as.Date(c("2020-01-01", "2010-01-01"))
+for (x in xs) {
+ print(x)
+}
+#> [1] 18262
+#> [1] 14610
+```
+vs.
+```
+for (i in seq_along(xs)) {
+ print(xs[[i]])
+}
+#> [1] "2020-01-01"
+#> [1] "2010-01-01"
+```
+
+## Related tools {-}
+
+- `while(condition) action`: performs action while condition is TRUE.
+- `repeat(action)`: repeats action forever (i.e. until it encounters break).
+
+- Note that `for` can be rewritten as `while` and while can be rewritten as `repeat` (this goes in one direction only!); *however*:
+
+>Good practice is to use the least-flexible solution to a problem, so you should use `for` wherever possible.
+BUT you shouldn't even use for loops for data analysis tasks as `map()` and `apply()` already provide *less flexible* solutions to most problems. (More in Chapter 9.)
+
+```{r}
+for (i in 1:5) {
+ print(i)
+}
+
+
+```
+
+```{r}
+
+x_option <- function(x) {
+ switch(x,
+ a = "option 1",
+ b = "option 2",
+ c = "option 3"#,
+ #stop("Invalid `x` value")
+ )
+}
+
+```
+
+
+
+```{r}
+i <- 1
+
+while(i <=5 ) {
+ print(i)
+ i <- i+1
+}
+```
+
+```{r}
+i <- 1
+
+repeat {
+ print(i)
+ i <- i+1
+ if (i > 5) break
+}
+
+```
+
+
+---
+
+
+
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/96eY6YS_3hU")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/x5I_uHnMxIk")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/u6UMGWDuxDE")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/G4YOvwsSw2Q")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/AZwJjsl8xiI")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/wg2QZ3rMIqM")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:16:34 Federica Gazzelloni: https://github.com/r4ds/bookclub-Advanced_R
+00:22:28 Federica Gazzelloni: https://stackoverflow.com/questions/50646133/dplyr-if-else-vs-base-r-ifelse
+00:26:20 Trevin: case_when() is great, makes it easy to read
+00:54:01 Trevin: out[I, ]
+00:54:14 Trevin: out[i, ]
+00:55:03 Trevin: I think you have to specify number of rows and columns before..
+00:55:30 Trevin: iterations = 10
+ variables = 2
+
+ output <- matrix(ncol=variables, nrow=iterations)
+00:55:43 Trevin: https://stackoverflow.com/questions/13442461/populating-a-data-frame-in-r-in-a-loop
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/W9CoQ15NlOc")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:40:18 Ryan Honomichl: What type of vector does each of the following calls to ifelse() return?
+
+* "ifelse returns a value with the same shape as test which is filled with elements selected from either yes or no depending on whether the element of test is TRUE or FALSE."
+00:42:11 Ryan Honomichl: "I recommend assigning the results of an if statement only when the entire expression fits on one line; otherwise it tends to be hard to read"
+00:42:46 Ryan Honomichl: * When you use the single argument form without an `else` statement, `if` invisibly returns NULL if the condition is FALSE.
+
+- Since functions like c() and paste() drop NULL inputs, this allows for a compact expression of certain idioms
+00:54:15 collinberke: https://docs.google.com/spreadsheets/d/1ScrbEw_-vB9DruaJhjtVY8HLQmuNPqyWeOOjmG6OY1M/edit?usp=sharing
+00:58:46 collinberke: https://www.youtube.com/@safe4democracy/videos
+```
+</details>
diff --git a/slides/05_Control_flow.Rmd b/slides/05_Control_flow.Rmd
@@ -1,487 +0,0 @@
-# Control flow
-
-**Learning objectives:**
-
-- Learn the **tools** for controlling flow of execution.
-
-- Learn some technical pitfalls and (perhaps lesser known) useful features.
-
-```{r echo = FALSE, fig.align = 'left', fig.dim = '100%'}
-knitr::include_graphics("images/whatif2.png")
-```
-```{r echo = FALSE, fig.align = 'right', fig.dim = '100%'}
-knitr::include_graphics("images/forloop.png")
-```
-
----
-
-## Introduction
-
-There are two main groups of flow control tools: **choices** and **loops**:
-
-- Choices (`if`, `switch`, `ifelse`, `dplyr::if_else`, `dplyr::case_when`) allow you to run different code depending on the input.
-
-- Loops (`for`, `while`, `repeat`) allow you to repeatedly run code
-
-
----
-
-
-## Choices
-
-
-
-`if()` and `else`
-
-Use `if` to specify a block of code to be executed, if a specified condition is true. Use `else` to specify a block of code to be executed, if the same condition is false.
-
-```{r, eval=FALSE}
-if (condition) true_action
-if (condition) true_action else false_action
-```
-
-(Note braces are only *needed* for compound expressions)
-
-```{r eval=FALSE, include=T}
-if (test_expression) {
- true_action
-} else {
- false_action
-}
-```
-
-
-Can be expanded to more alternatives:
-
-```{r, eval=FALSE}
-if (test_expression) {
- true_action
-} else if (other_test_expression) {
- other_action
-} else {
- false_action
-}
-```
-
-
-## Exercise {-}
-Why does this work?
-```
-x <- 1:10
-if (length(x)) "not empty" else "empty"
-#> [1] "not empty"
-
-x <- numeric()
-if (length(x)) "not empty" else "empty"
-#> [1] "empty"
-```
-
-`if` returns a value which can be assigned
-
-```{r}
-x1 <- if (TRUE) 1 else 2
-x2 <- if (FALSE) 1 else 2
-
-c(x1, x2)
-```
-
-The book recommends assigning the results of an if statement only when the entire expression fits on one line; otherwise it tends to be hard to read.
-
-
-## Single if without else {-}
-
-When you use the single argument form without an else statement, if invisibly (Section 6.7.2) returns NULL if the condition is FALSE. Since functions like c() and paste() drop NULL inputs, this allows for a compact expression of certain idioms:
-
-```{r, eval=FALSE}
-greet <- function(name, birthday = FALSE) {
- paste0(
- "Hi ", name,
- if (birthday) " and HAPPY BIRTHDAY"
- )
-}
-greet("Maria", FALSE)
-#> [1] "Hi Maria"
-greet("Jaime", TRUE)
-#> [1] "Hi Jaime and HAPPY BIRTHDAY"
-```
-
-
-
-```{r, eval=FALSE}
-format_lane_text <- function(number){
-
- paste0(
- number,
- " lane",
- if (number > 1) "s",
- " of sequencing"
- )
-}
-
-format_lane_text(1)
-#> [1] "1 lane of sequencing"
-format_lane_text(4)
-#> [1] "4 lanes of sequencing"
-```
-
-
-
-
-## Invalid inputs {-}
-
-- *Condition* must evaluate to a *single* `TRUE` or `FALSE`
-
-A single number gets coerced to a logical type.
-
-```{r, eval=FALSE}
-if (56) 1
-#> [1] 1
-if (0.3) 1
-#> [1] 1
-if (0) 1
-```
-
-If the condition cannot evaluate to a *single* `TRUE` or `FALSE`, an error is (usually) produced.
-
-```{r, eval=FALSE}
-if ("text") 1
-#> Error in if ("text") 1: argument is not interpretable as logical
-if ("true") 1
-#> 1
-if (numeric()) 1
-#> Error in if (numeric()) 1: argument is of length zero
-if (NULL) 1
-#> Error in if (NULL) 1 : argument is of length zero
-if (NA) 1
-#> Error in if (NA) 1: missing value where TRUE/FALSE needed
-```
-
-
-Exception is a logical vector of length greater than 1, which only generates a warning, unless you have `_R_CHECK_LENGTH_1_CONDITION_` set to `TRUE`.
-This seems to have been the default since R-4.2.0
-
-```{r, eval=FALSE}
-if (c(TRUE, FALSE)) 1
-#>Error in if (c(TRUE, FALSE)) 1 : the condition has length > 1
-```
-
-## Vectorized choices {-}
-
-- `ifelse()` is a vectorized version of `if`:
-
-```{r, eval=FALSE}
-x <- 1:10
-ifelse(x %% 5 == 0, "XXX", as.character(x))
-#> [1] "1" "2" "3" "4" "XXX" "6" "7" "8" "9" "XXX"
-
-ifelse(x %% 2 == 0, "even", "odd")
-#> [1] "odd" "even" "odd" "even" "odd" "even" "odd" "even" "odd" "even"
-```
-
-- `dplyr::if_else()`
-
-- Book recommends only using `ifelse()` "only when the yes and no vectors are the same type as it is otherwise hard to predict the output type."
-
-- `dplyr::if_else()` enforces this recommendation.
-
-**For example:**
-
-```{r eval=FALSE, include=T}
-ifelse(c(TRUE,TRUE,FALSE),"a",3)
-#> [1] "a" "a" "3"
-dplyr::if_else(c(TRUE,TRUE,FALSE),"a",3)
-#> Error in `dplyr::if_else()`:
-#> ! `false` must be a character vector, not a double vector.
-```
-
-## Switch {-}
-
-Rather then string together multiple if - else if chains, you can often use `switch`.
-
-
-```{r message=FALSE, warning=FALSE}
-centre <- function(x, type) {
- switch(type,
- mean = mean(x),
- median = median(x),
- trimmed = mean(x, trim = .1),
- stop("Invalid `type` value")
- )
-}
-```
-
-Last component should always throw an error, as unmatched inputs would otherwise invisibly return NULL.
-Book recommends to only use character inputs for `switch()`.
-
-```{r, eval=FALSE}
-vec <- c(1:20,50:55)
-centre(vec, "mean")
-#> [1] 20.19231
-centre(vec, "median")
-#> [1] 13.5
-centre(vec, "trimmed")
-#> [1] 18.77273
-```
-
-```{r, message=FALSE}
-set.seed(123)
-x <- rlnorm(100)
-
-centers <- data.frame(type = c('mean', 'median', 'trimmed'))
-centers$value = sapply(centers$type, \(t){centre(x,t)})
-
-require(ggplot2)
-ggplot(data = data.frame(x), aes(x))+
- geom_density()+
- geom_vline(data = centers,
- mapping = aes(color = type, xintercept = value),
- linewidth=0.5,linetype="dashed") +
- xlim(-1,10)+
- theme_bw()
-```
-
-
-Example from book of "falling through" to next value
-
-```{r}
-legs <- function(x) {
- switch(x,
- cow = ,
- horse = ,
- dog = 4,
- human = ,
- chicken = 2,
- plant = 0,
- stop("Unknown input")
- )
-}
-legs("cow")
-#> [1] 4
-legs("dog")
-#> [1] 4
-```
-
-
-
-
-## Using `dplyr::case_when` {-}
-
-- `case_when` is a more general `if_else` and can be used often in place of multiple chained `if_else` or sapply'ing `switch`.
-
-- It uses a special syntax to allow any number of condition-vector pairs:
-
-```{r message=FALSE, warning=FALSE}
-set.seed(123)
-x <- rlnorm(100)
-
-centers <- data.frame(type = c('mean', 'median', 'trimmed'))
-
-centers$value = dplyr::case_when(
- centers$type == 'mean' ~ mean(x),
- centers$type == 'median' ~ median(x),
- centers$type == 'trimmed' ~ mean(x, trim = 0.1),
- .default = 1000
- )
-
-centers
-```
-
-
-
-## Loops
-
-- Iteration over a elements of a vector
-
-`for (item in vector) perform_action`
-
-**First example**
-```{r}
-for(i in 1:5) {
- print(1:i)
-}
-
-x <- numeric(length=5L)
-df <- data.frame(x=1:5)
-
-for(i in 1:5) {
- df$y[[i]] <- i+1
-}
-```
-
-
-**Second example**: terminate a *for loop* earlier
-
-- `next` skips rest of current iteration
-- `break` exits the loop entirely
-
-```{r}
-for (i in 1:10) {
- if (i < 3)
- next
-
- print(i)
-
- if (i >= 5)
- break
-}
-```
-
-## Exercise {-}
-
-When the following code is evaluated, what can you say about the vector being iterated?
-```
-xs <- c(1, 2, 3)
-for (x in xs) {
- xs <- c(xs, x * 2)
-}
-xs
-#> [1] 1 2 3 2 4 6
-```
-
-## Pitfalls {-}
-
-- Preallocate output containers to avoid *slow* code.
-
-- Beware that `1:length(v)` when `v` has length 0 results in a iterating backwards over `1:0`, probably not what is intended. Use `seq_along(v)` instead.
-
-- When iterating over S3 vectors, use `[[]]` yourself to avoid stripping attributes.
-
-```
-xs <- as.Date(c("2020-01-01", "2010-01-01"))
-for (x in xs) {
- print(x)
-}
-#> [1] 18262
-#> [1] 14610
-```
-vs.
-```
-for (i in seq_along(xs)) {
- print(xs[[i]])
-}
-#> [1] "2020-01-01"
-#> [1] "2010-01-01"
-```
-
-## Related tools {-}
-
-- `while(condition) action`: performs action while condition is TRUE.
-- `repeat(action)`: repeats action forever (i.e. until it encounters break).
-
-- Note that `for` can be rewritten as `while` and while can be rewritten as `repeat` (this goes in one direction only!); *however*:
-
->Good practice is to use the least-flexible solution to a problem, so you should use `for` wherever possible.
-BUT you shouldn't even use for loops for data analysis tasks as `map()` and `apply()` already provide *less flexible* solutions to most problems. (More in Chapter 9.)
-
-```{r}
-for (i in 1:5) {
- print(i)
-}
-
-
-```
-
-```{r}
-
-x_option <- function(x) {
- switch(x,
- a = "option 1",
- b = "option 2",
- c = "option 3"#,
- #stop("Invalid `x` value")
- )
-}
-
-```
-
-
-
-```{r}
-i <- 1
-
-while(i <=5 ) {
- print(i)
- i <- i+1
-}
-```
-
-```{r}
-i <- 1
-
-repeat {
- print(i)
- i <- i+1
- if (i > 5) break
-}
-
-```
-
-
----
-
-
-
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/96eY6YS_3hU")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/x5I_uHnMxIk")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/u6UMGWDuxDE")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/G4YOvwsSw2Q")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/AZwJjsl8xiI")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/wg2QZ3rMIqM")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:16:34 Federica Gazzelloni: https://github.com/r4ds/bookclub-Advanced_R
-00:22:28 Federica Gazzelloni: https://stackoverflow.com/questions/50646133/dplyr-if-else-vs-base-r-ifelse
-00:26:20 Trevin: case_when() is great, makes it easy to read
-00:54:01 Trevin: out[I, ]
-00:54:14 Trevin: out[i, ]
-00:55:03 Trevin: I think you have to specify number of rows and columns before..
-00:55:30 Trevin: iterations = 10
- variables = 2
-
- output <- matrix(ncol=variables, nrow=iterations)
-00:55:43 Trevin: https://stackoverflow.com/questions/13442461/populating-a-data-frame-in-r-in-a-loop
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/W9CoQ15NlOc")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:40:18 Ryan Honomichl: What type of vector does each of the following calls to ifelse() return?
-
-* "ifelse returns a value with the same shape as test which is filled with elements selected from either yes or no depending on whether the element of test is TRUE or FALSE."
-00:42:11 Ryan Honomichl: "I recommend assigning the results of an if statement only when the entire expression fits on one line; otherwise it tends to be hard to read"
-00:42:46 Ryan Honomichl: * When you use the single argument form without an `else` statement, `if` invisibly returns NULL if the condition is FALSE.
-
-- Since functions like c() and paste() drop NULL inputs, this allows for a compact expression of certain idioms
-00:54:15 collinberke: https://docs.google.com/spreadsheets/d/1ScrbEw_-vB9DruaJhjtVY8HLQmuNPqyWeOOjmG6OY1M/edit?usp=sharing
-00:58:46 collinberke: https://www.youtube.com/@safe4democracy/videos
-```
-</details>
diff --git a/slides/06.Rmd b/slides/06.Rmd
@@ -0,0 +1,556 @@
+---
+engine: knitr
+title: Functions
+---
+
+## Learning objectives:
+
+- How to make functions in R
+- What are the parts of a function
+- Nested functions
+
+## How to make a simple function in R
+
+Let's imagine the structure of a function:
+
+```{r echo=FALSE, fig.align='center',fig.cap="The black dot on the left is the environment. The two blocks to the right are the function arguments."}
+knitr::include_graphics("images/06_functions.png")
+```
+
+
+**Function components**
+
+Functions have three parts, `formals()`, `body()`, and `environment()`.
+
+```{r 06-c01, echo=FALSE, fig.align='center', fig.dim="100%"}
+DiagrammeR::mermaid("
+ graph LR
+ A{formals}-->B(body)
+ B-->C(environment)
+style A fill:#bbf,stroke:#f66,stroke-width:2px,color:#fff,stroke-dasharray: 5 5
+",height = '100%', width = '100%')
+```
+
+**Example**
+
+```{r, echo = FALSE, message = FALSE}
+coffee_ratings <- readr::read_csv('https://raw.githubusercontent.com/rfordatascience/tidytuesday/master/data/2020/2020-07-07/coffee_ratings.csv')
+library(tidyverse)
+```
+
+```{r}
+coffee_ratings%>%slice(1:3)%>%select(1:5)
+```
+
+```{r, function_example}
+avg_points <- function(species){
+ # this function is for calculating the mean
+ avg <- coffee_ratings %>%
+ filter(species == species) %>%
+ summarise(mean = mean(total_cup_points))
+
+ return(avg)
+}
+
+```
+
+```{r}
+avg_points("Arabica")
+```
+
+```{r}
+formals(avg_points)
+```
+
+
+```{r}
+body(avg_points)
+```
+
+```{r}
+environment(avg_points)
+```
+
+Functions uses attributes, one attribute used by base R is `srcref`, short for **source reference**. It points to the source code used to create the function. It contains code comments and other formatting.
+```{r}
+attr(avg_points, "srcref")
+```
+
+## Primitive functions
+
+Are the core function in base R, such as `sum()`
+```{r}
+sum
+```
+
+Type of primitives:
+
+- builtin
+- special
+
+```{r}
+typeof(sum)
+```
+
+
+These core functions have components to NULL.
+
+## Anonymous functions
+
+If you don't provide a name to a function
+
+```{r}
+lapply(mtcars%>%select(mpg,cyl), function(x) length(unique(x)))
+```
+
+
+```{r}
+vector_len <- function(x) {
+ length(unique(x))
+}
+```
+
+```{r}
+lapply(mtcars%>%select(mpg,cyl), vector_len)
+```
+
+**Invoking a function**
+
+```{r}
+args <- unique(coffee_ratings$species) %>%
+ `[[`(1) %>%
+ as.list()
+
+
+
+do.call(avg_points, args)
+```
+
+
+
+## Function composition
+
+```{r}
+square <- function(x) x^2
+deviation <- function(x) x - mean(x)
+x <- runif(100)
+sqrt(mean(square(deviation(x))))
+```
+
+```{r}
+out <- deviation(x)
+out <- square(out)
+out <- mean(out)
+out <- sqrt(out)
+out
+```
+
+
+```{r}
+x %>%
+ deviation() %>%
+ square() %>%
+ mean() %>%
+ sqrt()
+```
+
+## More about functions insights
+
+### Lexical scoping
+
+**Rules**
+
+- Name masking
+- Functions versus variables
+- A fresh start
+- Dynamic lookup
+
+
+**Debugging**
+
+This function
+```{r}
+g12 <- function() x + 1
+x <- 15
+g12()
+```
+
+
+```{r}
+codetools::findGlobals(g12)
+```
+
+You can change the function’s environment to an environment which contains nothing:
+```{r}
+# environment(g12) <- emptyenv()
+# g12()
+# Error in x + 1 : could not find function "+"
+```
+
+
+### ... (dot-dot-dot)
+
+**Example**
+
+```{r}
+i01 <- function(y, z) {
+ list(y = y, z = z)
+}
+i02 <- function(x, ...) {
+ i01(...)
+}
+str(i02(x = 1, y = 2, z = 3))
+#> List of 2
+#> $ y: num 2
+#> $ z: num 3
+```
+
+### Exiting a function
+
+1. Implicit or explicit returns
+
+2. Invisibility (`<-` most famous function that returns an invisible value)
+
+3. `stop()` to stop a function with an error.
+
+4. Exit handlers
+
+
+### Function forms
+
+>Everything that exists is an object.
+Everything that happens is a function call.
+— John Chambers
+
+
+```{r echo=FALSE}
+knitr::include_graphics("images/06_forms.png")
+```
+
+---
+
+
+## Case Study: SIR model function
+
+This is an interesting example taken from a course on Coursera: [Infectious disease modelling-ICL](https://www.coursera.org/specializations/infectious-disease-modelling)
+
+The purpose of this example is to show how to make a model passing through making a function.
+
+First we need to load some useful libraries:
+
+```{r message=FALSE, warning=FALSE, paged.print=FALSE}
+library(deSolve)
+library(reshape2)
+```
+
+
+Then set the model inputs:
+
+- population size (N)
+- number of susceptable (S)
+- infected (I)
+- recovered (R)
+
+And add the model parameters:
+
+- infection rate ($\beta$)
+- recovery rate ($\gamma$)
+
+
+```{r}
+N<- 100000 # population
+
+state_values<- c(S = N -1, # susceptible
+ I = 1, # infected
+ R = 0) # recovered
+
+parameters<- c(beta = 1/2, # infection rate days^-1
+ gamma = 1/4) # recovery rate days^-1
+```
+
+
+Then we set the **time** as an important factor, which defines the length of time we are looking at this model run. It is intended as the time range in which the infections spread out, let’s say that we are aiming to investigate an infection period of 100 days.
+
+```{r}
+times<- seq(0, 100, by = 1)
+```
+
+Finally, we set up the **SIR model**, the susceptable, infected and recovered model. How do we do that is passing the paramenters through a function of the time, and state.
+
+Within the model function we calculate one more paramenter, the **force of infection**: $\lambda$
+
+```{r}
+sir_model<- function(time, state, parameters){
+ with(as.list(c(state, parameters)),{
+ N<- S + I + R
+ lambda = beta * I/N # force of infection
+ dS<- - lambda * S
+ dI<- lambda * S - gamma * I
+ dR<- gamma * I
+ return(list(c(dS,dI,dR)))
+ })
+}
+```
+
+
+Once we have our **SIR model** function ready, we can calculate the **output** of the model, with the help of the function `ode()` from {deSolve} package.
+
+```{r}
+output<- as.data.frame(ode(y = state_values,
+ times = times,
+ func = sir_model,
+ parms = parameters))
+output %>% head
+```
+
+In addition to our builtin SIR model function we can have a look at:
+
+```{r eval=FALSE, include=T}
+?deSolve::ode()
+```
+
+It solves **Ordinary Differential Equations**.
+
+```{r}
+deSolve:::ode
+```
+
+```{r}
+methods("ode")
+```
+
+
+---
+
+With the help of the {reshape2} package we use the function `melt()` to reshape the output:
+
+```{r}
+melt(output,id="time") %>% head
+```
+
+
+The same as usign `pivot_longer()` function.
+```{r}
+output%>%
+ pivot_longer(cols = c("S","I","R"),
+ names_to="variable",
+ values_to="values") %>%
+ arrange(desc(variable)) %>%
+ head
+```
+
+---
+
+
+Before to proceed with the visualization of the SIR model output we do a bit of investigations.
+
+**What if we want to see how `melt()` function works?**
+
+**What instruments we can use to see inside the function and understand how it works?**
+
+
+Using just the function name **melt** or `structure()` function with *melt* as an argument, we obtain the same output. To select just the argument of the function we can do `args(melt)`
+
+```{r}
+reshape2:::melt
+```
+
+
+```{r}
+body(melt)
+```
+
+```{r}
+formals(melt)
+```
+
+```{r}
+environment(melt)
+```
+
+
+```{r}
+typeof(melt)
+```
+
+> "R functions simulate a closure by keeping an explicit reference to the environment that was active when the function was defined."
+
+
+ref: [closures](https://www.r-bloggers.com/2015/03/using-closures-as-objects-in-r/)
+
+
+
+Try with `methods()`, or `print(methods(melt))`: Non-visible functions are asterisked!
+
+> The S3 method name is followed by an asterisk * if the method definition is not exported from the package namespace in which the method is defined.
+
+```{r}
+methods("melt", data)
+```
+
+```{r}
+methods(class="table")
+```
+
+```{r eval=FALSE, include=T}
+help(UseMethod)
+```
+
+
+We can access to some of the above calls with `getAnywhere()`, for example here is done for "melt.data.frame":
+```{r}
+getAnywhere("melt.data.frame")
+```
+
+
+References:
+
+- [stackoverflow article](https://stackoverflow.com/questions/11173683/how-can-i-read-the-source-code-for-an-r-function)
+- [Rnews bulletin: R Help Desk](https://www.r-project.org/doc/Rnews/Rnews_2006-4.pdf)
+
+
+
+---
+
+Going back to out model output visualization.
+
+```{r}
+output_full<- melt(output,id="time")
+```
+
+```{r}
+output_full$proportion<- output_full$value/sum(state_values)
+```
+
+```{r}
+ggplot(data = output, aes(x = time, y = I)) +
+ geom_line() +
+ xlab("Time(days)") +
+ ylab("Number of Infected") +
+ labs("SIR Model: prevalence of infection")
+```
+
+```{r}
+ggplot(output_full, aes(time, proportion, color = variable, group = variable)) +
+ geom_line() +
+ xlab("Time(days)") +
+ ylab("Prevalence") +
+ labs(color = "Compartment", title = "SIR Model")
+```
+
+
+
+
+---
+
+
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/UwzGhMndWzs")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/51PMEM4Efb8")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/Vwuo-e_Ir0s")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/lg5rzOU6lsg")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/q8K0Jl5hiV0")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/BPd6-G9e32I")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:01:11 Oluwafemi Oyedele: Hi, Good evening
+00:01:22 Federica Gazzelloni: Hello!
+00:43:19 Federica Gazzelloni: https://r4ds.github.io/bookclub-Advanced_R/QandA/docs/welcome.html
+00:52:48 Priyanka: sounds good actually
+00:52:59 Federica Gazzelloni: 👍🏻
+```
+</details>
+
+`r knitr::include_url("https://www.youtube.com/embed/GCDXXkBQrGk")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:09:30 Oluwafemi Oyedele: Hi, Good evening
+00:10:41 Federica Gazzelloni: Hi
+00:14:40 Federica Gazzelloni: that's great!
+00:54:24 Trevin: Also, sorry if you are repeating 🙂
+00:54:52 Arthur Shaw: @ryan, thank you so much for the awesome synthesis! Could you share your reference list? I'd love to dive more deeply into the material you presented.
+00:57:02 Ryan Metcalf: https://cran.r-project.org/doc/manuals/r-release/R-lang.pdf
+00:59:32 Trevin: https://github.com/COHHIO/RmData
+01:01:48 Ryan Metcalf: https://mastering-shiny.org/
+01:02:02 Ryan Metcalf: https://engineering-shiny.org/
+01:02:15 Arthur Shaw: @trevin, if you get bored with beepr, move to BRRR ;)
+01:02:16 Arthur Shaw: https://github.com/brooke-watson/BRRR
+01:09:27 Ryan Metcalf: This is amazing Trevin! I'll take a closer look. Is it ok to reach out to you with any questions?
+01:09:43 Trevin: Yeah, feel free to reach out
+```
+</details>
+
+`r knitr::include_url("https://www.youtube.com/embed/NaiQa_u-j1k")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:05:34 Trevin: I didn't catch that
+00:06:02 priyanka gagneja: i won't be presenting I said .. so you two have the stage
+00:08:39 Federica Gazzelloni: no worries
+00:08:46 Federica Gazzelloni: next time you do it
+00:08:56 Federica Gazzelloni: did you sign up?
+00:09:45 Trevin: Discord is free: https://discord.gg/rstudioconf2022
+00:10:04 Trevin: Free stream link: https://www.rstudio.com/conference/stream
+00:24:32 Arthur Shaw: Maybe silly question: is the magrittr pipe an infix function?
+00:32:15 Trevin: https://colinfay.me/playing-r-infix-functions/
+00:33:23 Arthur Shaw: Maybe another example of an infix function: lubridate's `%within%`
+00:33:47 Trevin: That's a good one too ^
+00:33:55 priyanka gagneja: yes within would be good.
+00:40:13 Arthur Shaw: no
+00:49:50 Arthur Shaw: Sorry for dropping in and out. My WiFi router is having issues today--maybe is failing.
+01:08:59 Trevin: Looking forward to it 🙂
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/tz2z9l41IhU")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:31:54 Ronald Legere: https://en.wikipedia.org/wiki/First-class_function
+00:42:55 Ronald Legere: https://en.wikipedia.org/wiki/Immediately_invoked_function_expression
+```
+</details>
+
+`r knitr::include_url("https://www.youtube.com/embed/AbdcI57vbcg")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:54:02 Ron: Book gives this simple example of when you might want to use prefix form of an infix operator: lapply(list(1:3, 4:5), `+`, 3)
+00:56:49 collinberke: https://colinfay.me/playing-r-infix-functions/#:~:text=What%20are%20infix%20functions%3F,%2C%20%2B%20%2C%20and%20so%20on.
+01:07:36 Ron: x[3] <- 33
+01:07:51 Ron: `[<-`(x,3,value =33)
+```
+</details>
diff --git a/slides/06_Functions.Rmd b/slides/06_Functions.Rmd
@@ -1,553 +0,0 @@
-# Functions
-
-**Learning objectives:**
-
-- How to make functions in R
-- What are the parts of a function
-- Nested functions
-
-## How to make a simple function in R
-
-Let's imagine the structure of a function:
-
-```{r echo=FALSE, fig.align='center',fig.cap="The black dot on the left is the environment. The two blocks to the right are the function arguments."}
-knitr::include_graphics("images/06_functions.png")
-```
-
-
-**Function components**
-
-Functions have three parts, `formals()`, `body()`, and `environment()`.
-
-```{r 06-c01, echo=FALSE, fig.align='center', fig.dim="100%"}
-DiagrammeR::mermaid("
- graph LR
- A{formals}-->B(body)
- B-->C(environment)
-style A fill:#bbf,stroke:#f66,stroke-width:2px,color:#fff,stroke-dasharray: 5 5
-",height = '100%', width = '100%')
-```
-
-**Example**
-
-```{r, echo = FALSE, message = FALSE}
-coffee_ratings <- readr::read_csv('https://raw.githubusercontent.com/rfordatascience/tidytuesday/master/data/2020/2020-07-07/coffee_ratings.csv')
-library(tidyverse)
-```
-
-```{r}
-coffee_ratings%>%slice(1:3)%>%select(1:5)
-```
-
-```{r, function_example}
-avg_points <- function(species){
- # this function is for calculating the mean
- avg <- coffee_ratings %>%
- filter(species == species) %>%
- summarise(mean = mean(total_cup_points))
-
- return(avg)
-}
-
-```
-
-```{r}
-avg_points("Arabica")
-```
-
-```{r}
-formals(avg_points)
-```
-
-
-```{r}
-body(avg_points)
-```
-
-```{r}
-environment(avg_points)
-```
-
-Functions uses attributes, one attribute used by base R is `srcref`, short for **source reference**. It points to the source code used to create the function. It contains code comments and other formatting.
-```{r}
-attr(avg_points, "srcref")
-```
-
-## Primitive functions
-
-Are the core function in base R, such as `sum()`
-```{r}
-sum
-```
-
-Type of primitives:
-
-- builtin
-- special
-
-```{r}
-typeof(sum)
-```
-
-
-These core functions have components to NULL.
-
-## Anonymous functions
-
-If you don't provide a name to a function
-
-```{r}
-lapply(mtcars%>%select(mpg,cyl), function(x) length(unique(x)))
-```
-
-
-```{r}
-vector_len <- function(x) {
- length(unique(x))
-}
-```
-
-```{r}
-lapply(mtcars%>%select(mpg,cyl), vector_len)
-```
-
-**Invoking a function**
-
-```{r}
-args <- unique(coffee_ratings$species) %>%
- `[[`(1) %>%
- as.list()
-
-
-
-do.call(avg_points, args)
-```
-
-
-
-## Function composition
-
-```{r}
-square <- function(x) x^2
-deviation <- function(x) x - mean(x)
-x <- runif(100)
-sqrt(mean(square(deviation(x))))
-```
-
-```{r}
-out <- deviation(x)
-out <- square(out)
-out <- mean(out)
-out <- sqrt(out)
-out
-```
-
-
-```{r}
-x %>%
- deviation() %>%
- square() %>%
- mean() %>%
- sqrt()
-```
-
-## More about functions insights
-
-### Lexical scoping
-
-**Rules**
-
-- Name masking
-- Functions versus variables
-- A fresh start
-- Dynamic lookup
-
-
-**Debugging**
-
-This function
-```{r}
-g12 <- function() x + 1
-x <- 15
-g12()
-```
-
-
-```{r}
-codetools::findGlobals(g12)
-```
-
-You can change the function’s environment to an environment which contains nothing:
-```{r}
-# environment(g12) <- emptyenv()
-# g12()
-# Error in x + 1 : could not find function "+"
-```
-
-
-### ... (dot-dot-dot)
-
-**Example**
-
-```{r}
-i01 <- function(y, z) {
- list(y = y, z = z)
-}
-i02 <- function(x, ...) {
- i01(...)
-}
-str(i02(x = 1, y = 2, z = 3))
-#> List of 2
-#> $ y: num 2
-#> $ z: num 3
-```
-
-### Exiting a function
-
-1. Implicit or explicit returns
-
-2. Invisibility (`<-` most famous function that returns an invisible value)
-
-3. `stop()` to stop a function with an error.
-
-4. Exit handlers
-
-
-### Function forms
-
->Everything that exists is an object.
-Everything that happens is a function call.
-— John Chambers
-
-
-```{r echo=FALSE}
-knitr::include_graphics("images/06_forms.png")
-```
-
----
-
-
-## Case Study: SIR model function
-
-This is an interesting example taken from a course on Coursera: [Infectious disease modelling-ICL](https://www.coursera.org/specializations/infectious-disease-modelling)
-
-The purpose of this example is to show how to make a model passing through making a function.
-
-First we need to load some useful libraries:
-
-```{r message=FALSE, warning=FALSE, paged.print=FALSE}
-library(deSolve)
-library(reshape2)
-```
-
-
-Then set the model inputs:
-
-- population size (N)
-- number of susceptable (S)
-- infected (I)
-- recovered (R)
-
-And add the model parameters:
-
-- infection rate ($\beta$)
-- recovery rate ($\gamma$)
-
-
-```{r}
-N<- 100000 # population
-
-state_values<- c(S = N -1, # susceptible
- I = 1, # infected
- R = 0) # recovered
-
-parameters<- c(beta = 1/2, # infection rate days^-1
- gamma = 1/4) # recovery rate days^-1
-```
-
-
-Then we set the **time** as an important factor, which defines the length of time we are looking at this model run. It is intended as the time range in which the infections spread out, let’s say that we are aiming to investigate an infection period of 100 days.
-
-```{r}
-times<- seq(0, 100, by = 1)
-```
-
-Finally, we set up the **SIR model**, the susceptable, infected and recovered model. How do we do that is passing the paramenters through a function of the time, and state.
-
-Within the model function we calculate one more paramenter, the **force of infection**: $\lambda$
-
-```{r}
-sir_model<- function(time, state, parameters){
- with(as.list(c(state, parameters)),{
- N<- S + I + R
- lambda = beta * I/N # force of infection
- dS<- - lambda * S
- dI<- lambda * S - gamma * I
- dR<- gamma * I
- return(list(c(dS,dI,dR)))
- })
-}
-```
-
-
-Once we have our **SIR model** function ready, we can calculate the **output** of the model, with the help of the function `ode()` from {deSolve} package.
-
-```{r}
-output<- as.data.frame(ode(y = state_values,
- times = times,
- func = sir_model,
- parms = parameters))
-output %>% head
-```
-
-In addition to our builtin SIR model function we can have a look at:
-
-```{r eval=FALSE, include=T}
-?deSolve::ode()
-```
-
-It solves **Ordinary Differential Equations**.
-
-```{r}
-deSolve:::ode
-```
-
-```{r}
-methods("ode")
-```
-
-
----
-
-With the help of the {reshape2} package we use the function `melt()` to reshape the output:
-
-```{r}
-melt(output,id="time") %>% head
-```
-
-
-The same as usign `pivot_longer()` function.
-```{r}
-output%>%
- pivot_longer(cols = c("S","I","R"),
- names_to="variable",
- values_to="values") %>%
- arrange(desc(variable)) %>%
- head
-```
-
----
-
-
-Before to proceed with the visualization of the SIR model output we do a bit of investigations.
-
-**What if we want to see how `melt()` function works?**
-
-**What instruments we can use to see inside the function and understand how it works?**
-
-
-Using just the function name **melt** or `structure()` function with *melt* as an argument, we obtain the same output. To select just the argument of the function we can do `args(melt)`
-
-```{r}
-reshape2:::melt
-```
-
-
-```{r}
-body(melt)
-```
-
-```{r}
-formals(melt)
-```
-
-```{r}
-environment(melt)
-```
-
-
-```{r}
-typeof(melt)
-```
-
-> "R functions simulate a closure by keeping an explicit reference to the environment that was active when the function was defined."
-
-
-ref: [closures](https://www.r-bloggers.com/2015/03/using-closures-as-objects-in-r/)
-
-
-
-Try with `methods()`, or `print(methods(melt))`: Non-visible functions are asterisked!
-
-> The S3 method name is followed by an asterisk * if the method definition is not exported from the package namespace in which the method is defined.
-
-```{r}
-methods("melt", data)
-```
-
-```{r}
-methods(class="table")
-```
-
-```{r eval=FALSE, include=T}
-help(UseMethod)
-```
-
-
-We can access to some of the above calls with `getAnywhere()`, for example here is done for "melt.data.frame":
-```{r}
-getAnywhere("melt.data.frame")
-```
-
-
-References:
-
-- [stackoverflow article](https://stackoverflow.com/questions/11173683/how-can-i-read-the-source-code-for-an-r-function)
-- [Rnews bulletin: R Help Desk](https://www.r-project.org/doc/Rnews/Rnews_2006-4.pdf)
-
-
-
----
-
-Going back to out model output visualization.
-
-```{r}
-output_full<- melt(output,id="time")
-```
-
-```{r}
-output_full$proportion<- output_full$value/sum(state_values)
-```
-
-```{r}
-ggplot(data = output, aes(x = time, y = I)) +
- geom_line() +
- xlab("Time(days)") +
- ylab("Number of Infected") +
- labs("SIR Model: prevalence of infection")
-```
-
-```{r}
-ggplot(output_full, aes(time, proportion, color = variable, group = variable)) +
- geom_line() +
- xlab("Time(days)") +
- ylab("Prevalence") +
- labs(color = "Compartment", title = "SIR Model")
-```
-
-
-
-
----
-
-
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/UwzGhMndWzs")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/51PMEM4Efb8")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/Vwuo-e_Ir0s")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/lg5rzOU6lsg")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/q8K0Jl5hiV0")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/BPd6-G9e32I")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:01:11 Oluwafemi Oyedele: Hi, Good evening
-00:01:22 Federica Gazzelloni: Hello!
-00:43:19 Federica Gazzelloni: https://r4ds.github.io/bookclub-Advanced_R/QandA/docs/welcome.html
-00:52:48 Priyanka: sounds good actually
-00:52:59 Federica Gazzelloni: 👍🏻
-```
-</details>
-
-`r knitr::include_url("https://www.youtube.com/embed/GCDXXkBQrGk")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:09:30 Oluwafemi Oyedele: Hi, Good evening
-00:10:41 Federica Gazzelloni: Hi
-00:14:40 Federica Gazzelloni: that's great!
-00:54:24 Trevin: Also, sorry if you are repeating 🙂
-00:54:52 Arthur Shaw: @ryan, thank you so much for the awesome synthesis! Could you share your reference list? I'd love to dive more deeply into the material you presented.
-00:57:02 Ryan Metcalf: https://cran.r-project.org/doc/manuals/r-release/R-lang.pdf
-00:59:32 Trevin: https://github.com/COHHIO/RmData
-01:01:48 Ryan Metcalf: https://mastering-shiny.org/
-01:02:02 Ryan Metcalf: https://engineering-shiny.org/
-01:02:15 Arthur Shaw: @trevin, if you get bored with beepr, move to BRRR ;)
-01:02:16 Arthur Shaw: https://github.com/brooke-watson/BRRR
-01:09:27 Ryan Metcalf: This is amazing Trevin! I'll take a closer look. Is it ok to reach out to you with any questions?
-01:09:43 Trevin: Yeah, feel free to reach out
-```
-</details>
-
-`r knitr::include_url("https://www.youtube.com/embed/NaiQa_u-j1k")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:05:34 Trevin: I didn't catch that
-00:06:02 priyanka gagneja: i won't be presenting I said .. so you two have the stage
-00:08:39 Federica Gazzelloni: no worries
-00:08:46 Federica Gazzelloni: next time you do it
-00:08:56 Federica Gazzelloni: did you sign up?
-00:09:45 Trevin: Discord is free: https://discord.gg/rstudioconf2022
-00:10:04 Trevin: Free stream link: https://www.rstudio.com/conference/stream
-00:24:32 Arthur Shaw: Maybe silly question: is the magrittr pipe an infix function?
-00:32:15 Trevin: https://colinfay.me/playing-r-infix-functions/
-00:33:23 Arthur Shaw: Maybe another example of an infix function: lubridate's `%within%`
-00:33:47 Trevin: That's a good one too ^
-00:33:55 priyanka gagneja: yes within would be good.
-00:40:13 Arthur Shaw: no
-00:49:50 Arthur Shaw: Sorry for dropping in and out. My WiFi router is having issues today--maybe is failing.
-01:08:59 Trevin: Looking forward to it 🙂
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/tz2z9l41IhU")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:31:54 Ronald Legere: https://en.wikipedia.org/wiki/First-class_function
-00:42:55 Ronald Legere: https://en.wikipedia.org/wiki/Immediately_invoked_function_expression
-```
-</details>
-
-`r knitr::include_url("https://www.youtube.com/embed/AbdcI57vbcg")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:54:02 Ron: Book gives this simple example of when you might want to use prefix form of an infix operator: lapply(list(1:3, 4:5), `+`, 3)
-00:56:49 collinberke: https://colinfay.me/playing-r-infix-functions/#:~:text=What%20are%20infix%20functions%3F,%2C%20%2B%20%2C%20and%20so%20on.
-01:07:36 Ron: x[3] <- 33
-01:07:51 Ron: `[<-`(x,3,value =33)
-```
-</details>
diff --git a/slides/07.Rmd b/slides/07.Rmd
@@ -0,0 +1,91 @@
+---
+engine: knitr
+title: Environments
+---
+
+## Learning objectives:
+
+- THESE ARE NICE TO HAVE BUT NOT ABSOLUTELY NECESSARY
+
+## SLIDE 1
+
+- ADD SLIDES AS SECTIONS (`##`).
+- TRY TO KEEP THEM RELATIVELY SLIDE-LIKE; THESE ARE NOTES, NOT THE BOOK ITSELF.
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/mk7iu1-P8ZU")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/syRMRYKN30k")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/fW7Di01gLhw")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/Aw_Q7PMYJkA")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/tuafimbMyKk")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/buUaaOu89EQ")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:08:41 Arthur Shaw: Hello, everyone!
+00:21:31 Federica Gazzelloni: ?walk: Apply a function to each element of a list or atomic vector
+00:23:15 Federica Gazzelloni: ?caller_env: Get properties of the current or caller frame
+00:24:56 Trevin: purrr::walk(x, function(x, ce, ace = rlang::caller_env()) {
+ .ce <- rlang::caller_env()
+ message("Internal: ")
+ print(.ce)
+ message("Argument: ")
+ print(ace)
+ message("External: ")
+ print(ce)
+ message("Internal: ",paste0(ls(.ce), collapse = "\n"))
+ message("Argument: ",paste0(ls(ace), collapse = "\n"))
+ message("External: ",paste0(ls(ce), collapse = "\n"))
+}, ce = rlang::caller_env())
+00:29:39 Federica Gazzelloni: ??iwalk: Apply a function to each element of a vector, and its index
+00:35:30 Arthur Shaw: https://magrittr.tidyverse.org/reference/tee.html
+00:36:05 Federica Gazzelloni: ?`%T>%`
+00:46:59 Trevin: ?eval
+01:06:03 Federica Gazzelloni: https://cran.r-project.org/web/packages/withr/index.html
+01:09:21 Federica Gazzelloni: https://github.com/r-lib/withr
+01:10:38 Trevin: I'm okay if we meet next week
+01:10:53 Oluwafemi Oyedele: I am ok with next week
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/PUXrijnsWy0")`
+
+<details>
+<summary>Meeting chat log</summary>
+```
+00:06:49 Ryan Honomichl: https://r4ds.github.io/bookclub-Advanced_R/QandA/docs/environments.html
+```
+</details>
+
+`r knitr::include_url("https://www.youtube.com/embed/6xECnY4ro48")`
+
+<details>
+<summary>Meeting chat log</summary>
+```
+00:14:44 collinberke: https://ivelasq.rbind.io/blog/macos-rig/index.html
+00:21:10 collinberke: https://github.com/tidyverse/dplyr/blob/main/NAMESPACE
+01:00:21 collinberke: https://r4ds.hadley.nz/iteration.html
+```
+</details>
diff --git a/slides/07_Environments.Rmd b/slides/07_Environments.Rmd
@@ -1,88 +0,0 @@
-# Environments
-
-**Learning objectives:**
-
-- THESE ARE NICE TO HAVE BUT NOT ABSOLUTELY NECESSARY
-
-## SLIDE 1
-
-- ADD SLIDES AS SECTIONS (`##`).
-- TRY TO KEEP THEM RELATIVELY SLIDE-LIKE; THESE ARE NOTES, NOT THE BOOK ITSELF.
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/mk7iu1-P8ZU")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/syRMRYKN30k")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/fW7Di01gLhw")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/Aw_Q7PMYJkA")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/tuafimbMyKk")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/buUaaOu89EQ")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:08:41 Arthur Shaw: Hello, everyone!
-00:21:31 Federica Gazzelloni: ?walk: Apply a function to each element of a list or atomic vector
-00:23:15 Federica Gazzelloni: ?caller_env: Get properties of the current or caller frame
-00:24:56 Trevin: purrr::walk(x, function(x, ce, ace = rlang::caller_env()) {
- .ce <- rlang::caller_env()
- message("Internal: ")
- print(.ce)
- message("Argument: ")
- print(ace)
- message("External: ")
- print(ce)
- message("Internal: ",paste0(ls(.ce), collapse = "\n"))
- message("Argument: ",paste0(ls(ace), collapse = "\n"))
- message("External: ",paste0(ls(ce), collapse = "\n"))
-}, ce = rlang::caller_env())
-00:29:39 Federica Gazzelloni: ??iwalk: Apply a function to each element of a vector, and its index
-00:35:30 Arthur Shaw: https://magrittr.tidyverse.org/reference/tee.html
-00:36:05 Federica Gazzelloni: ?`%T>%`
-00:46:59 Trevin: ?eval
-01:06:03 Federica Gazzelloni: https://cran.r-project.org/web/packages/withr/index.html
-01:09:21 Federica Gazzelloni: https://github.com/r-lib/withr
-01:10:38 Trevin: I'm okay if we meet next week
-01:10:53 Oluwafemi Oyedele: I am ok with next week
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/PUXrijnsWy0")`
-
-<details>
-<summary>Meeting chat log</summary>
-```
-00:06:49 Ryan Honomichl: https://r4ds.github.io/bookclub-Advanced_R/QandA/docs/environments.html
-```
-</details>
-
-`r knitr::include_url("https://www.youtube.com/embed/6xECnY4ro48")`
-
-<details>
-<summary>Meeting chat log</summary>
-```
-00:14:44 collinberke: https://ivelasq.rbind.io/blog/macos-rig/index.html
-00:21:10 collinberke: https://github.com/tidyverse/dplyr/blob/main/NAMESPACE
-01:00:21 collinberke: https://r4ds.hadley.nz/iteration.html
-```
-</details>
diff --git a/slides/08.Rmd b/slides/08.Rmd
@@ -0,0 +1,552 @@
+---
+engine: knitr
+title: Conditions
+---
+
+## Learning objectives:
+
+- What conditions are
+- How to use them
+
+## Introduction
+
+What are conditions? Problems that happen in functions:
+
+- Error
+- Warning
+- Message
+
+As a function author, one can signal them--that is, say there's a problem.
+
+As a function consumer, one can handle them--for example, react or ignore.
+
+## Signalling conditions
+
+### Types of conditions
+
+Three types of conditions:
+
+- `r emoji::emoji("x")` **Errors.** Problem arose, and the function cannot continue.
+- `r emoji::emoji("warning")` **Warnings.** Problem arose, but the function can continue, if only partially.
+- `r emoji::emoji("speech_balloon")` **Messages.** Something happened, and the user should know.
+
+### `r emoji::emoji("x")` Errors
+
+How to throw errors
+
+```{r throwing_errors, error = TRUE}
+# with base R
+stop("... in the name of love...")
+
+# with rlang
+rlang::abort("...before you break my heart...")
+
+# with base R; without call
+stop("... think it o-o-over...", call. = FALSE)
+```
+Composing error messages
+
+- Mechanics.
+ - `stop()` pastes together arguments
+```{r, error = TRUE}
+some_val <- 1
+stop("Your value is: ", some_val, call. = FALSE)
+```
+ - `abort()` requires `{glue}`
+```{r, error = TRUE}
+some_val <- 1
+rlang::abort(glue::glue("Your value is: {some_val}"))
+```
+- Style. See [here](http://style.tidyverse.org/error-messages.html).
+
+### `r emoji::emoji("warning")` Warnings
+
+May have multiple warnings per call
+
+```{r}
+warn <- function() {
+ warning("This is your first warning")
+ warning("This is your second warning")
+ warning("This is your LAST warning")
+}
+```
+
+Print all warnings once call is complete.
+
+```{r}
+warn()
+```
+
+Like errors, `warning()` has
+
+- a call argument
+- an `{rlang}` analog
+
+```{r}
+# base R
+# ... with call (implicitly .call = TRUE)
+warning("Warning")
+# ... with call suppressed
+warning("Warning", call. = FALSE)
+
+# rlang
+# note: call suppressed by default
+rlang::warn("Warning")
+```
+
+(Hadley's) advice on usage:
+
+- Err on the side of errors. In other words, error rather than warn.
+- But warnings make sense in a few cases:
+ - Function is being deprecated. Warn that it is reaching end of life.
+ - Function is reasonably sure to recover from issue.
+
+### `r emoji::emoji("speech_balloon")` Messages
+
+Mechanics:
+
+- Issued immediately
+- Do not have a call argument
+
+Style:
+
+Messages are best when they inform about:
+
+- Default arguments
+- Status updates of for functions used primarily for side-effects (e.g., interaction with web API, file downloaded, etc.)
+- Progress of long-running process (in the absence of a status bar).
+- Package loading message (e.g., attaching package, objects masked)
+
+## Ignoring conditions
+
+A few ways:
+
+- `try()`
+- `suppressWarnings()`
+- `suppressMessages()`
+
+### `try()`
+
+What it does:
+
+- Displays error
+- But continues execution after error
+
+```{r}
+bad_log <- function(x) {
+ try(log(x))
+ 10
+}
+
+bad_log("bad")
+```
+
+Better ways to react to/recover from errors:
+
+1. Use `tryCatch()` to "catch" the error and perform a different action in the event of an error.
+1. Set a default value inside the call. See below.
+
+```{r}
+default <- NULL
+try(default <- read.csv("possibly-bad-input.csv"), silent = TRUE)
+```
+
+
+### `suppressWarnings()`, `suppressMessages()`
+
+What it does:
+
+- Supresses all warnings (messages)
+
+```{r}
+# suppress warnings (from our `warn()` function above)
+suppressWarnings(warn())
+
+# suppress messages
+many_messages <- function() {
+ message("Message 1")
+ message("Message 2")
+ message("Message 3")
+}
+
+suppressMessages(many_messages())
+```
+
+## Handling conditions
+
+Every condition has a default behavior:
+
+- `r emoji::emoji("x")` Errors halt execution
+- `r emoji::emoji("warning")` Warnings are collected during execution and displayed in bulk after execution
+- `r emoji::emoji("speech_balloon")` Messages are displayed immediately
+
+Condition handlers allow one to change that behavior (within the scope of a function).
+
+Two handler functions:
+
+- `tryCatch()`
+- `withCallingHandlers()`
+
+```{r, eval=FALSE}
+# try to run `code_to_try_to_run`
+# if (error) condition is signalled, fun some other code
+tryCatch(
+ error = function(cnd) {
+ # code to run when error is thrown
+ },
+ code_to_try_to_run
+)
+
+# try to `code_to_try_to_run`
+# if condition is signalled, run code corresponding to condition type
+withCallingHandlers(
+ warning = function(cnd) {
+ # code to run when warning is signalled
+ },
+ message = function(cnd) {
+ # code to run when message is signalled
+ },
+ code_to_try_to_run
+)
+```
+
+
+### Condition objects
+
+```{r}
+# catch a condition
+cnd <- rlang::catch_cnd(stop("An error"))
+# inspect it
+str(cnd)
+```
+
+The standard components
+
+- `message`. The error message. To extract it, use `conditionMessage(cnd)`.
+- `call`. The function call that triggered the condition. To extract it, use `conditionCall(cnd)`.
+
+But custom conditions may contain other components.
+
+### Exiting handlers
+
+If a condition is signalled, this type of handler controls what code to run before exiting the function call.
+
+```{r}
+f3 <- function(x) {
+ tryCatch(
+ # if error signalled, return NA
+ error = function(cnd) NA,
+ # try to run log
+ log(x)
+ )
+}
+
+f3("x")
+```
+
+When a condition is signalled, control moves to the handler and never returns to the original code.
+
+```{r}
+tryCatch(
+ message = function(cnd) "There",
+ {
+ message("Here")
+ stop("This code is never run!")
+ }
+)
+```
+
+The `tryCatch()` exit handler has one final argument: `finally`. This is run regardless of the condition of the original code. This is often used for clean-up.
+
+```{r}
+# try to write text to disk
+# if an error is signalled--for example, `path` does not exist
+# or if no condition is signalled
+# that is in both cases, the code block in `finally` is executed
+path <- tempfile()
+tryCatch(
+ {
+ writeLines("Hi!", path)
+ # ...
+ },
+ finally = {
+ # always run
+ unlink(path)
+ }
+)
+```
+
+### Calling handlers
+
+Definition by verbal comparison:
+
+- With exit handlers, code exits the normal flow once a condition is signalled
+- With calling handlers, code continues in the normal flow once control is returned by the handler.
+
+Definition by code comparison:
+
+```{r}
+# with an exit handler, control moves to the handler once condition signalled and does not move back
+tryCatch(
+ message = function(cnd) cat("Caught a message!\n"),
+ {
+ message("Someone there?")
+ message("Why, yes!")
+ }
+)
+
+# with a calling handler, control moves first to the handler and the moves back to the main code
+withCallingHandlers(
+ message = function(cnd) cat("Caught a message!\n"),
+ {
+ message("Someone there?")
+ message("Why, yes!")
+ }
+)
+```
+
+### By default, conditions propagate
+
+Let's suppose that there are nested handlers. If a condition is signalled in the child, it propagates to its parent handler(s).
+
+```{r}
+# Bubbles all the way up to default handler which generates the message
+withCallingHandlers(
+ message = function(cnd) cat("Level 2\n"),
+ withCallingHandlers(
+ message = function(cnd) cat("Level 1\n"),
+ message("Hello")
+ )
+)
+
+# Bubbles up to tryCatch
+tryCatch(
+ message = function(cnd) cat("Level 2\n"),
+ withCallingHandlers(
+ message = function(cnd) cat("Level 1\n"),
+ message("Hello")
+ )
+)
+```
+
+### But conditions can be muffled
+
+If one wants to "muffle" the siginal, one needs to use `rlang::cnd_muffle()`
+
+```{r}
+# Muffles the default handler which prints the messages
+withCallingHandlers(
+ message = function(cnd) {
+ cat("Level 2\n")
+ rlang::cnd_muffle(cnd)
+ },
+ withCallingHandlers(
+ message = function(cnd) cat("Level 1\n"),
+ message("Hello")
+ )
+)
+
+# Muffles level 2 handler and the default handler
+withCallingHandlers(
+ message = function(cnd) cat("Level 2\n"),
+ withCallingHandlers(
+ message = function(cnd) {
+ cat("Level 1\n")
+ rlang::cnd_muffle(cnd)
+ },
+ message("Hello")
+ )
+)
+```
+
+### Call stacks
+
+Call stacks of exiting and calling handlers differ.
+
+Why?
+
+> Calling handlers are called in the context of the call that signalled the condition
+> exiting handlers are called in the context of the call to tryCatch()
+
+To see this, consider how the call stacks differ for a toy example.
+
+```{r}
+# create a function
+f <- function() g()
+g <- function() h()
+h <- function() message
+
+# call stack of calling handlers
+withCallingHandlers(f(), message = function(cnd) {
+ lobstr::cst()
+ rlang::cnd_muffle(cnd)
+})
+
+# call stack of exit handlers
+tryCatch(f(), message = function(cnd) lobstr::cst())
+tryCatch(f(), message = function(cnd) lobstr::cst())
+```
+
+## Custom conditions
+
+### Motivation
+
+The `base::log()` function provides a minimal error message.
+
+```{r, error = TRUE}
+log(letters)
+log(1:10, base = letters)
+```
+
+One could make a more informative error message about which argument is problematic.
+
+```{r}
+my_log <- function(x, base = exp(1)) {
+ if (!is.numeric(x)) {
+ rlang::abort(paste0(
+ "`x` must be a numeric vector; not ", typeof(x), "."
+ ))
+ }
+ if (!is.numeric(base)) {
+ rlang::abort(paste0(
+ "`base` must be a numeric vector; not ", typeof(base), "."
+ ))
+ }
+
+ base::log(x, base = base)
+}
+```
+
+Consider the difference:
+
+```{r, error = TRUE}
+my_log(letters)
+my_log(1:10, base = letters)
+```
+
+
+### Signalling
+
+Create a helper function to describe errors:
+
+```{r}
+abort_bad_argument <- function(arg, must, not = NULL) {
+ msg <- glue::glue("`{arg}` must {must}")
+ if (!is.null(not)) {
+ not <- typeof(not)
+ msg <- glue::glue("{msg}; not {not}.")
+ }
+
+ rlang::abort(
+ "error_bad_argument", # <- this is the (error) class, I believe
+ message = msg,
+ arg = arg,
+ must = must,
+ not = not
+ )
+}
+```
+
+Rewrite the log function to use this helper function:
+
+```{r}
+my_log <- function(x, base = exp(1)) {
+ if (!is.numeric(x)) {
+ abort_bad_argument("x", must = "be numeric", not = x)
+ }
+ if (!is.numeric(base)) {
+ abort_bad_argument("base", must = "be numeric", not = base)
+ }
+
+ base::log(x, base = base)
+}
+```
+
+See the result for the end user:
+
+```{r, error = TRUE}
+my_log(letters)
+my_log(1:10, base = letters)
+```
+
+### Handling
+
+Use class of condition object to allow for different handling of different types of errors
+
+```{r, error = TRUE}
+tryCatch(
+ error_bad_argument = function(cnd) "bad_argument",
+ error = function(cnd) "other error",
+ my_log("a")
+)
+```
+
+But note that the first handler that matches any of the signal's class, potentially in a vector of signal classes, will get control. So put the most specific handlers first.
+
+## Applications
+
+See [the sub-section in the book](https://adv-r.hadley.nz/conditions.html#condition-applications) for excellent examples.
+
+## Resources
+
+- Conditions articles in rlang vignettes:
+ - [Including function calls in error messages](https://rlang.r-lib.org/reference/topic-error-call.html)
+ - [Including contextual information with error chains](https://rlang.r-lib.org/reference/topic-error-chaining.html)
+ - [Formatting messages with cli](https://rlang.r-lib.org/reference/topic-condition-formatting.html)
+- [Other resources](https://github.com/rstudio-conf-2022/pkg-dev-masterclass/blob/main/materials/5-error-resources.md) from error message segment of rstudio::conf(2022) workshop "Package Development Masterclass"
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/mwiNe083DLU")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/ZFUr7YRSu2o")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/UZhrsVz6wi0")`
+
+`r knitr::include_url("https://www.youtube.com/embed/Wt7p71_BuYY")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/WinIo5mrUZo")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/VFs-2sl5C70")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/VwmrbPUQY1k")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:19:16 Trevin: https://style.tidyverse.org/error-messages.html
+00:20:14 Trevin: More on errors in the design guide: https://design.tidyverse.org/
+01:14:27 Federica Gazzelloni: more info here: https://colinfay.me/learn-shiny-production/
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/t1N6XdidvNo")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:34:09 Ron: Someone did: https://cran.r-project.org/web/packages/comprehenr/vignettes/Introduction.html
+00:47:58 collinberke: https://purrr.tidyverse.org/reference/safely.html
+00:48:24 Ron: it's a function operator !
+00:49:37 Ron: \(x) length(unique(x) is not too verbose though
+00:49:39 Ron: ;)
+01:06:50 collinberke: https://colinfay.me/purrr-mappers/
+01:07:45 collinberke: https://colinfay.me/purrr-web-mining/
+```
+</details>
diff --git a/slides/08_Conditions.Rmd b/slides/08_Conditions.Rmd
@@ -1,549 +0,0 @@
-# Conditions
-
-**Learning objectives:**
-
-- What conditions are
-- How to use them
-
-## Introduction
-
-What are conditions? Problems that happen in functions:
-
-- Error
-- Warning
-- Message
-
-As a function author, one can signal them--that is, say there's a problem.
-
-As a function consumer, one can handle them--for example, react or ignore.
-
-## Signalling conditions
-
-### Types of conditions
-
-Three types of conditions:
-
-- `r emoji::emoji("x")` **Errors.** Problem arose, and the function cannot continue.
-- `r emoji::emoji("warning")` **Warnings.** Problem arose, but the function can continue, if only partially.
-- `r emoji::emoji("speech_balloon")` **Messages.** Something happened, and the user should know.
-
-### `r emoji::emoji("x")` Errors
-
-How to throw errors
-
-```{r throwing_errors, error = TRUE}
-# with base R
-stop("... in the name of love...")
-
-# with rlang
-rlang::abort("...before you break my heart...")
-
-# with base R; without call
-stop("... think it o-o-over...", call. = FALSE)
-```
-Composing error messages
-
-- Mechanics.
- - `stop()` pastes together arguments
-```{r, error = TRUE}
-some_val <- 1
-stop("Your value is: ", some_val, call. = FALSE)
-```
- - `abort()` requires `{glue}`
-```{r, error = TRUE}
-some_val <- 1
-rlang::abort(glue::glue("Your value is: {some_val}"))
-```
-- Style. See [here](http://style.tidyverse.org/error-messages.html).
-
-### `r emoji::emoji("warning")` Warnings
-
-May have multiple warnings per call
-
-```{r}
-warn <- function() {
- warning("This is your first warning")
- warning("This is your second warning")
- warning("This is your LAST warning")
-}
-```
-
-Print all warnings once call is complete.
-
-```{r}
-warn()
-```
-
-Like errors, `warning()` has
-
-- a call argument
-- an `{rlang}` analog
-
-```{r}
-# base R
-# ... with call (implicitly .call = TRUE)
-warning("Warning")
-# ... with call suppressed
-warning("Warning", call. = FALSE)
-
-# rlang
-# note: call suppressed by default
-rlang::warn("Warning")
-```
-
-(Hadley's) advice on usage:
-
-- Err on the side of errors. In other words, error rather than warn.
-- But warnings make sense in a few cases:
- - Function is being deprecated. Warn that it is reaching end of life.
- - Function is reasonably sure to recover from issue.
-
-### `r emoji::emoji("speech_balloon")` Messages
-
-Mechanics:
-
-- Issued immediately
-- Do not have a call argument
-
-Style:
-
-Messages are best when they inform about:
-
-- Default arguments
-- Status updates of for functions used primarily for side-effects (e.g., interaction with web API, file downloaded, etc.)
-- Progress of long-running process (in the absence of a status bar).
-- Package loading message (e.g., attaching package, objects masked)
-
-## Ignoring conditions
-
-A few ways:
-
-- `try()`
-- `suppressWarnings()`
-- `suppressMessages()`
-
-### `try()`
-
-What it does:
-
-- Displays error
-- But continues execution after error
-
-```{r}
-bad_log <- function(x) {
- try(log(x))
- 10
-}
-
-bad_log("bad")
-```
-
-Better ways to react to/recover from errors:
-
-1. Use `tryCatch()` to "catch" the error and perform a different action in the event of an error.
-1. Set a default value inside the call. See below.
-
-```{r}
-default <- NULL
-try(default <- read.csv("possibly-bad-input.csv"), silent = TRUE)
-```
-
-
-### `suppressWarnings()`, `suppressMessages()`
-
-What it does:
-
-- Supresses all warnings (messages)
-
-```{r}
-# suppress warnings (from our `warn()` function above)
-suppressWarnings(warn())
-
-# suppress messages
-many_messages <- function() {
- message("Message 1")
- message("Message 2")
- message("Message 3")
-}
-
-suppressMessages(many_messages())
-```
-
-## Handling conditions
-
-Every condition has a default behavior:
-
-- `r emoji::emoji("x")` Errors halt execution
-- `r emoji::emoji("warning")` Warnings are collected during execution and displayed in bulk after execution
-- `r emoji::emoji("speech_balloon")` Messages are displayed immediately
-
-Condition handlers allow one to change that behavior (within the scope of a function).
-
-Two handler functions:
-
-- `tryCatch()`
-- `withCallingHandlers()`
-
-```{r, eval=FALSE}
-# try to run `code_to_try_to_run`
-# if (error) condition is signalled, fun some other code
-tryCatch(
- error = function(cnd) {
- # code to run when error is thrown
- },
- code_to_try_to_run
-)
-
-# try to `code_to_try_to_run`
-# if condition is signalled, run code corresponding to condition type
-withCallingHandlers(
- warning = function(cnd) {
- # code to run when warning is signalled
- },
- message = function(cnd) {
- # code to run when message is signalled
- },
- code_to_try_to_run
-)
-```
-
-
-### Condition objects
-
-```{r}
-# catch a condition
-cnd <- rlang::catch_cnd(stop("An error"))
-# inspect it
-str(cnd)
-```
-
-The standard components
-
-- `message`. The error message. To extract it, use `conditionMessage(cnd)`.
-- `call`. The function call that triggered the condition. To extract it, use `conditionCall(cnd)`.
-
-But custom conditions may contain other components.
-
-### Exiting handlers
-
-If a condition is signalled, this type of handler controls what code to run before exiting the function call.
-
-```{r}
-f3 <- function(x) {
- tryCatch(
- # if error signalled, return NA
- error = function(cnd) NA,
- # try to run log
- log(x)
- )
-}
-
-f3("x")
-```
-
-When a condition is signalled, control moves to the handler and never returns to the original code.
-
-```{r}
-tryCatch(
- message = function(cnd) "There",
- {
- message("Here")
- stop("This code is never run!")
- }
-)
-```
-
-The `tryCatch()` exit handler has one final argument: `finally`. This is run regardless of the condition of the original code. This is often used for clean-up.
-
-```{r}
-# try to write text to disk
-# if an error is signalled--for example, `path` does not exist
-# or if no condition is signalled
-# that is in both cases, the code block in `finally` is executed
-path <- tempfile()
-tryCatch(
- {
- writeLines("Hi!", path)
- # ...
- },
- finally = {
- # always run
- unlink(path)
- }
-)
-```
-
-### Calling handlers
-
-Definition by verbal comparison:
-
-- With exit handlers, code exits the normal flow once a condition is signalled
-- With calling handlers, code continues in the normal flow once control is returned by the handler.
-
-Definition by code comparison:
-
-```{r}
-# with an exit handler, control moves to the handler once condition signalled and does not move back
-tryCatch(
- message = function(cnd) cat("Caught a message!\n"),
- {
- message("Someone there?")
- message("Why, yes!")
- }
-)
-
-# with a calling handler, control moves first to the handler and the moves back to the main code
-withCallingHandlers(
- message = function(cnd) cat("Caught a message!\n"),
- {
- message("Someone there?")
- message("Why, yes!")
- }
-)
-```
-
-### By default, conditions propagate
-
-Let's suppose that there are nested handlers. If a condition is signalled in the child, it propagates to its parent handler(s).
-
-```{r}
-# Bubbles all the way up to default handler which generates the message
-withCallingHandlers(
- message = function(cnd) cat("Level 2\n"),
- withCallingHandlers(
- message = function(cnd) cat("Level 1\n"),
- message("Hello")
- )
-)
-
-# Bubbles up to tryCatch
-tryCatch(
- message = function(cnd) cat("Level 2\n"),
- withCallingHandlers(
- message = function(cnd) cat("Level 1\n"),
- message("Hello")
- )
-)
-```
-
-### But conditions can be muffled
-
-If one wants to "muffle" the siginal, one needs to use `rlang::cnd_muffle()`
-
-```{r}
-# Muffles the default handler which prints the messages
-withCallingHandlers(
- message = function(cnd) {
- cat("Level 2\n")
- rlang::cnd_muffle(cnd)
- },
- withCallingHandlers(
- message = function(cnd) cat("Level 1\n"),
- message("Hello")
- )
-)
-
-# Muffles level 2 handler and the default handler
-withCallingHandlers(
- message = function(cnd) cat("Level 2\n"),
- withCallingHandlers(
- message = function(cnd) {
- cat("Level 1\n")
- rlang::cnd_muffle(cnd)
- },
- message("Hello")
- )
-)
-```
-
-### Call stacks
-
-Call stacks of exiting and calling handlers differ.
-
-Why?
-
-> Calling handlers are called in the context of the call that signalled the condition
-> exiting handlers are called in the context of the call to tryCatch()
-
-To see this, consider how the call stacks differ for a toy example.
-
-```{r}
-# create a function
-f <- function() g()
-g <- function() h()
-h <- function() message
-
-# call stack of calling handlers
-withCallingHandlers(f(), message = function(cnd) {
- lobstr::cst()
- rlang::cnd_muffle(cnd)
-})
-
-# call stack of exit handlers
-tryCatch(f(), message = function(cnd) lobstr::cst())
-tryCatch(f(), message = function(cnd) lobstr::cst())
-```
-
-## Custom conditions
-
-### Motivation
-
-The `base::log()` function provides a minimal error message.
-
-```{r, error = TRUE}
-log(letters)
-log(1:10, base = letters)
-```
-
-One could make a more informative error message about which argument is problematic.
-
-```{r}
-my_log <- function(x, base = exp(1)) {
- if (!is.numeric(x)) {
- rlang::abort(paste0(
- "`x` must be a numeric vector; not ", typeof(x), "."
- ))
- }
- if (!is.numeric(base)) {
- rlang::abort(paste0(
- "`base` must be a numeric vector; not ", typeof(base), "."
- ))
- }
-
- base::log(x, base = base)
-}
-```
-
-Consider the difference:
-
-```{r, error = TRUE}
-my_log(letters)
-my_log(1:10, base = letters)
-```
-
-
-### Signalling
-
-Create a helper function to describe errors:
-
-```{r}
-abort_bad_argument <- function(arg, must, not = NULL) {
- msg <- glue::glue("`{arg}` must {must}")
- if (!is.null(not)) {
- not <- typeof(not)
- msg <- glue::glue("{msg}; not {not}.")
- }
-
- rlang::abort(
- "error_bad_argument", # <- this is the (error) class, I believe
- message = msg,
- arg = arg,
- must = must,
- not = not
- )
-}
-```
-
-Rewrite the log function to use this helper function:
-
-```{r}
-my_log <- function(x, base = exp(1)) {
- if (!is.numeric(x)) {
- abort_bad_argument("x", must = "be numeric", not = x)
- }
- if (!is.numeric(base)) {
- abort_bad_argument("base", must = "be numeric", not = base)
- }
-
- base::log(x, base = base)
-}
-```
-
-See the result for the end user:
-
-```{r, error = TRUE}
-my_log(letters)
-my_log(1:10, base = letters)
-```
-
-### Handling
-
-Use class of condition object to allow for different handling of different types of errors
-
-```{r, error = TRUE}
-tryCatch(
- error_bad_argument = function(cnd) "bad_argument",
- error = function(cnd) "other error",
- my_log("a")
-)
-```
-
-But note that the first handler that matches any of the signal's class, potentially in a vector of signal classes, will get control. So put the most specific handlers first.
-
-## Applications
-
-See [the sub-section in the book](https://adv-r.hadley.nz/conditions.html#condition-applications) for excellent examples.
-
-## Resources
-
-- Conditions articles in rlang vignettes:
- - [Including function calls in error messages](https://rlang.r-lib.org/reference/topic-error-call.html)
- - [Including contextual information with error chains](https://rlang.r-lib.org/reference/topic-error-chaining.html)
- - [Formatting messages with cli](https://rlang.r-lib.org/reference/topic-condition-formatting.html)
-- [Other resources](https://github.com/rstudio-conf-2022/pkg-dev-masterclass/blob/main/materials/5-error-resources.md) from error message segment of rstudio::conf(2022) workshop "Package Development Masterclass"
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/mwiNe083DLU")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/ZFUr7YRSu2o")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/UZhrsVz6wi0")`
-
-`r knitr::include_url("https://www.youtube.com/embed/Wt7p71_BuYY")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/WinIo5mrUZo")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/VFs-2sl5C70")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/VwmrbPUQY1k")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:19:16 Trevin: https://style.tidyverse.org/error-messages.html
-00:20:14 Trevin: More on errors in the design guide: https://design.tidyverse.org/
-01:14:27 Federica Gazzelloni: more info here: https://colinfay.me/learn-shiny-production/
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/t1N6XdidvNo")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:34:09 Ron: Someone did: https://cran.r-project.org/web/packages/comprehenr/vignettes/Introduction.html
-00:47:58 collinberke: https://purrr.tidyverse.org/reference/safely.html
-00:48:24 Ron: it's a function operator !
-00:49:37 Ron: \(x) length(unique(x) is not too verbose though
-00:49:39 Ron: ;)
-01:06:50 collinberke: https://colinfay.me/purrr-mappers/
-01:07:45 collinberke: https://colinfay.me/purrr-web-mining/
-```
-</details>
diff --git a/slides/09.Rmd b/slides/09.Rmd
@@ -0,0 +1,630 @@
+---
+engine: knitr
+title: Functionals
+---
+
+## Learning objectives:
+
+- Define functionals.
+- Use the `purrr::map()` family of functionals.
+- Use the `purrr::walk()` family of functionals.
+- Use the `purrr::reduce()` and `purrr::accumulate()` family of functionals.
+- Use `purrr::safely()` and `purrr::possibly()` to deal with failure.
+
+9.1. **Introduction**
+
+9.2. **map()**
+
+9.3. **purrr** style
+
+9.4. **map_** variants
+
+9.5. **reduce()** and **accumulate** family of functions
+
+- Some functions that weren't covered
+
+
+## What are functionals {-}
+
+## Introduction
+
+__Functionals__ are functions that take function as input and return a vector as output. Functionals that you probably have used before are: `apply()`, `lapply()` or `tapply()`.
+
+
+- alternatives to loops
+
+- a functional is better than a `for` loop is better than `while` is better than `repeat`
+
+
+### Benefits {-}
+
+
+- encourages function logic to be separated from iteration logic
+
+- can collapse into vectors/data frames easily
+
+
+## Map
+
+`map()` has two arguments, a vector and a function. It performs the function on each element of the vector and returns a list. We can also pass in some additional argument into the function.
+
+```{r,echo=FALSE,warning=FALSE,message=FALSE}
+knitr::include_graphics(path = 'images/9_2_3_map-arg.png')
+```
+
+```{r}
+simple_map <- function(x, f, ...) {
+out <- vector("list", length(x))
+for (i in seq_along(x)) {
+out[[i]] <- f(x[[i]], ...)
+}
+out
+}
+```
+
+## Benefit of using the map function in purrr {-}
+
+- `purrr::map()` is equivalent to `lapply()`
+
+- returns a list and is the most general
+
+- the length of the input == the length of the output
+
+- `map()` is more flexible, with additional arguments allowed
+
+- `map()` has a host of extensions
+
+
+
+```{r load,echo=FALSE,warning=FALSE,message=FALSE}
+library(tidyverse)
+```
+
+## Atomic vectors {-}
+
+
+- has 4 variants to return atomic vectors
+ - `map_chr()`
+ - `map_dbl()`
+ - `map_int()`
+ - `map_lgl()`
+
+```{r}
+triple <- function(x) x * 3
+map(.x=1:3, .f=triple)
+
+map_dbl(.x=1:3, .f=triple)
+
+map_lgl(.x=c(1, NA, 3), .f=is.na)
+```
+
+## Anonymous functions and shortcuts {-}
+
+ **Anonymous functions**
+```{r}
+map_dbl(.x=mtcars, .f=function(x) mean(x, na.rm = TRUE)) |>
+ head()
+```
+
+- the "twiddle" uses a twiddle `~` to set a formula
+- can use `.x` to reference the input `map(.x = ..., .f = )`
+```{r, eval=FALSE}
+map_dbl(.x=mtcars, .f=~mean(.x, na.rm = TRUE))
+```
+
+- can be simplified further as
+```{r}
+map_dbl(.x=mtcars, .f=mean, na.rm = TRUE)
+```
+
+- what happens when we try a handful of variants of the task at hand? (how many unique values are there for each variable?)
+
+Note that `.x` is the **name** of the first argument in `map()` (`.f` is the name of the second argument).
+
+```{r}
+#| error: true
+# the task
+map_dbl(mtcars, function(x) length(unique(x)))
+map_dbl(mtcars, function(unicorn) length(unique(unicorn)))
+map_dbl(mtcars, ~length(unique(.x)))
+map_dbl(mtcars, ~length(unique(..1)))
+map_dbl(mtcars, ~length(unique(.)))
+
+# not the task
+map_dbl(mtcars, length)
+map_dbl(mtcars, length(unique))
+map_dbl(mtcars, 1)
+```
+
+```{r}
+#| echo: false
+#| message: false
+#| warning: false
+rm(x)
+```
+
+```{r}
+#| error: true
+#error
+map_dbl(mtcars, length(unique()))
+map_dbl(mtcars, ~length(unique(x)))
+```
+
+
+## Modify {-}
+
+Sometimes we might want the output to be the same as the input, then in that case we can use the modify function rather than map
+
+```{r}
+df <- data.frame(x=1:3,y=6:4)
+
+map(df, .f=~.x*3)
+
+modify(.x=df,.f=~.x*3)
+```
+
+Note that `modify()` always returns the same type of output (which is not necessarily true with `map()`). Additionally, `modify()` does not actually change the value of `df`.
+
+```{r}
+df
+```
+
+
+## `purrr` style
+
+```{r}
+mtcars |>
+ map(head, 20) |> # pull first 20 of each column
+ map_dbl(mean) |> # mean of each vector
+ head()
+```
+
+An example from `tidytuesday`
+```{r, eval=FALSE}
+#| warning: false
+#| message: false
+
+tt <- tidytuesdayR::tt_load("2020-06-30")
+
+# filter data & exclude columns with lost of nulls
+list_df <-
+ map(
+ .x = tt[1:3],
+ .f =
+ ~ .x |>
+ filter(issue <= 152 | issue > 200) |>
+ mutate(timeframe = ifelse(issue <= 152, "first 5 years", "last 5 years")) |>
+ select_if(~mean(is.na(.x)) < 0.2)
+ )
+
+
+# write to global environment
+iwalk(
+ .x = list_df,
+ .f = ~ assign(x = .y, value = .x, envir = globalenv())
+)
+```
+
+## `map_*()` variants
+
+There are many variants
+
+
+
+
+## `map2_*()` {-}
+
+- raise each value `.x` by 2
+
+```{r}
+map_dbl(
+ .x = 1:5,
+ .f = function(x) x ^ 2
+)
+```
+
+- raise each value `.x` by another value `.y`
+
+```{r}
+map2_dbl(
+ .x = 1:5,
+ .y = 2:6,
+ .f = ~ (.x ^ .y)
+)
+```
+
+
+## The benefit of using the map over apply family of function {-}
+- It is written in C
+- It preserves names
+- We always know the return value type
+- We can apply the function for multiple input values
+- We can pass additional arguments into the function
+
+
+## `walk()` {-}
+
+
+- We use `walk()` when we want to call a function for it side effect(s) rather than its return value, like generating plots, `write.csv()`, or `ggsave()`. If you don't want a return value, `map()` will print more info than you may want.
+
+
+```{r}
+map(1:3, ~cat(.x, "\n"))
+```
+
+- for these cases, use `walk()` instead
+```{r}
+walk(1:3, ~cat(.x, "\n"))
+```
+
+`cat()` does have a result, it's just usually returned invisibly.
+
+```{r}
+cat("hello")
+
+(cat("hello"))
+```
+
+
+We can use `pwalk()` to save a list of plot to disk. Note that the "p" in `pwalk()` means that we have more than 1 (or 2) variables to pipe into the function. Also note that the name of the first argument in all of the "p" functions is now `.l` (instead of `.x`).
+
+```{r}
+plots <- mtcars |>
+ split(mtcars$cyl) |>
+ map(~ggplot(.x, aes(mpg,wt)) +
+ geom_point())
+
+paths <- stringr::str_c(names(plots), '.png')
+
+pwalk(.l = list(paths,plots), .f = ggsave, path = tempdir())
+pmap(.l = list(paths,plots), .f = ggsave, path = tempdir())
+
+```
+
+- walk, walk2 and pwalk all invisibly return .x the first argument. This makes them suitable for use in the middle of pipelines.
+
+- note: I don't think that it is "`.x`" (or "`.l`") that they are returning invisibly. But I'm not sure what it is. Hadley says:
+
+> purrr provides the walk family of functions that ignore the return values of the `.f` and instead return `.x` invisibly.
+
+But not in the first `cat()` example, it is the `NULL` values that get returned invisibly (those aren't the same as `.x`).
+
+## `imap()` {-}
+
+- `imap()` is like `map2()`except that `.y` is derived from `names(.x)` if named or `seq_along(.x)` if not.
+
+- These two produce the same result
+
+```{r}
+imap_chr(.x = mtcars,
+ .f = ~ paste(.y, "has a mean of", round(mean(.x), 1))) |>
+head()
+
+map2_chr(.x = mtcars,
+ .y = names(mtcars),
+ .f = ~ paste(.y, "has a mean of", round(mean(.x), 1))) |>
+head()
+```
+
+
+## `pmap()` {-}
+
+- you can pass a named list or dataframe as arguments to a function
+
+- for example `runif()` has the parameters `n`, `min` and `max`
+
+```{r}
+params <- tibble::tribble(
+ ~ n, ~ min, ~ max,
+ 1L, 1, 10,
+ 2L, 10, 100,
+ 3L, 100, 1000
+)
+
+pmap(params, runif)
+```
+
+- could also be
+
+```{r}
+list(
+ n = 1:3,
+ min = 10 ^ (0:2),
+ max = 10 ^ (1:3)
+) |>
+pmap(runif)
+```
+
+- I like to use `expand_grid()` when I want all possible parameter combinations.
+
+```{r}
+expand_grid(n = 1:3,
+ min = 10 ^ (0:1),
+ max = 10 ^ (1:2))
+
+expand_grid(n = 1:3,
+ min = 10 ^ (0:1),
+ max = 10 ^ (1:2)) |>
+pmap(runif)
+```
+
+
+
+## `reduce()` family
+
+The `reduce()` function is a powerful functional that allows you to abstract away from a sequence of functions that are applied in a fixed direction.
+
+`reduce()` takes a vector as its first argument, a function as its second argument, and an optional `.init` argument last. It will then apply the function repeatedly to the vector until there is only a single element left.
+
+(Hint: start at the top of the image and read down.)
+
+```{r,echo=FALSE,warning=FALSE,message=FALSE}
+knitr::include_graphics(path = 'images/reduce-init.png')
+```
+
+
+Let me really quickly demonstrate `reduce()` in action.
+
+Say you wanted to add up the numbers 1 through 5 using only the plus operator `+`. You could do something like:
+
+```{r}
+1 + 2 + 3 + 4 + 5
+
+```
+
+Which is the same as:
+
+```{r}
+reduce(1:5, `+`)
+```
+
+And if you want the start value to be something that is not the first argument of the vector, pass that value to the .init argument:
+
+```{r}
+
+identical(
+ 0.5 + 1 + 2 + 3 + 4 + 5,
+ reduce(1:5, `+`, .init = 0.5)
+)
+
+```
+
+## ggplot2 example with reduce {-}
+
+```{r}
+ggplot(mtcars, aes(hp, mpg)) +
+ geom_point(size = 8, alpha = .5, color = "yellow") +
+ geom_point(size = 4, alpha = .5, color = "red") +
+ geom_point(size = 2, alpha = .5, color = "blue")
+
+```
+
+Let us use the `reduce()` function. Note that `reduce2()` takes two arguments, but the first value (`..1`) is given by the `.init` value.
+
+```{r}
+reduce2(
+ c(8, 4, 2),
+ c("yellow", "red", "blue"),
+ ~ ..1 + geom_point(size = ..2, alpha = .5, color = ..3),
+ .init = ggplot(mtcars, aes(hp, mpg))
+)
+
+```
+
+```{r}
+df <- list(age=tibble(name='john',age=30),
+ sex=tibble(name=c('john','mary'),sex=c('M','F'),
+ trt=tibble(name='Mary',treatment='A')))
+
+df
+
+df |> reduce(.f = full_join)
+
+reduce(.x = df,.f = full_join)
+```
+
+- to see all intermediate steps, use **accumulate()**
+
+```{r}
+set.seed(1234)
+accumulate(1:5, `+`)
+```
+
+```{r}
+accumulate2(
+ c(8, 4, 2),
+ c("yellow", "red", "blue"),
+ ~ ..1 + geom_point(size = ..2, alpha = .5, color = ..3),
+ .init = ggplot(mtcars, aes(hp, mpg))
+)
+```
+
+
+## `map_df*()` variants {-}
+
+- `map_dfr()` = row bind the results
+
+- `map_dfc()` = column bind the results
+
+- Note that `map_dfr()` has been superseded by `map() |> list_rbind()` and `map_dfc()` has been superseded by `map() |> list_cbind()`
+
+```{r}
+col_stats <- function(n) {
+ head(mtcars, n) |>
+ summarise_all(mean) |>
+ mutate_all(floor) |>
+ mutate(n = paste("N =", n))
+}
+
+map((1:2) * 10, col_stats)
+
+map_dfr((1:2) * 10, col_stats)
+
+map((1:2) * 10, col_stats) |> list_rbind()
+```
+
+---
+
+## `pluck()` {-}
+
+- `pluck()` will pull a single element from a list
+
+I like the example from the book because the starting object is not particularly easy to work with (as many JSON objects might not be).
+
+```{r}
+my_list <- list(
+ list(-1, x = 1, y = c(2), z = "a"),
+ list(-2, x = 4, y = c(5, 6), z = "b"),
+ list(-3, x = 8, y = c(9, 10, 11))
+)
+my_list
+```
+
+Notice that the "first element" means something different in standard `pluck()` versus `map`ped `pluck()`.
+
+```{r}
+pluck(my_list, 1)
+
+map(my_list, pluck, 1)
+
+map_dbl(my_list, pluck, 1)
+```
+
+The `map()` functions also have shortcuts for extracting elements from vectors (powered by `purrr::pluck()`). Note that `map(my_list, 3)` is a shortcut for `map(my_list, pluck, 3)`.
+
+```{r}
+#| error: true
+
+# Select by name
+map_dbl(my_list, "x")
+
+# Or by position
+map_dbl(my_list, 1)
+
+# Or by both
+map_dbl(my_list, list("y", 1))
+
+# You'll get an error if you try to retrieve an inside item that doesn't have
+# a consistent format and you want a numeric output
+map_dbl(my_list, list("y"))
+
+
+# You'll get an error if a component doesn't exist:
+map_chr(my_list, "z")
+#> Error: Result 3 must be a single string, not NULL of length 0
+
+# Unless you supply a .default value
+map_chr(my_list, "z", .default = NA)
+#> [1] "a" "b" NA
+```
+
+
+## Not covered: `flatten()` {-}
+
+- `flatten()` will turn a list of lists into a simpler vector.
+
+```{r}
+my_list <-
+ list(
+ a = 1:3,
+ b = list(1:3)
+ )
+
+my_list
+
+map_if(my_list, is.list, pluck)
+
+map_if(my_list, is.list, flatten_int)
+
+map_if(my_list, is.list, flatten_int) |>
+ flatten_int()
+```
+
+## Dealing with Failures {-}
+
+## Safely {-}
+
+`safely()` is an adverb. It takes a function (a verb) and returns a modified version. In this case, the modified function will never throw an error. Instead it always returns a list with two elements.
+
+- `result` is the original result. If there is an error this will be NULL
+
+- `error` is an error object. If the operation was successful the "`error`" will be NULL.
+
+```{r}
+A <- list(1, 10, "a")
+
+map(.x = A, .f = safely(log))
+
+```
+
+## Possibly {-}
+
+`possibly()` always succeeds. It is simpler than `safely()`, because you can give it a default value to return when there is an error.
+
+```{r}
+A <- list(1,10,"a")
+
+map_dbl(.x = A, .f = possibly(log, otherwise = NA_real_) )
+
+```
+
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/o0a6aJ4kCkU")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/YrZ13_4vUMw")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/DUHXo527mHs")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/SpDpmhW62Ns")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/tYqFMtmhmiI")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/HmDlvnp6uNQ")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:15:49 Matt Dupree: did anyone else lose audio?
+00:15:59 Federica Gazzelloni: not me
+00:16:02 Arthur Shaw: Not me either
+00:16:04 Trevin: okay for me
+00:16:27 Matt Dupree: gonna try rejoining
+00:43:14 Matt Dupree: oh i didn't know they invisibly returned .x! That's useful!
+00:48:29 Arthur Shaw: Very cool trick !
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/t1N6XdidvNo")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:34:09 Ron: Someone did: https://cran.r-project.org/web/packages/comprehenr/vignettes/Introduction.html
+00:47:58 collinberke: https://purrr.tidyverse.org/reference/safely.html
+00:48:24 Ron: it's a function operator !
+00:49:37 Ron: \(x) length(unique(x) is not too verbose though
+00:49:39 Ron: ;)
+01:06:50 collinberke: https://colinfay.me/purrr-mappers/
+01:07:45 collinberke: https://colinfay.me/purrr-web-mining/
+```
+</details>
+
+`r knitr::include_url("https://www.youtube.com/embed/6gY3KZWYC00")`
diff --git a/slides/09_Functionals.Rmd b/slides/09_Functionals.Rmd
@@ -1,627 +0,0 @@
-# Functionals
-
-**Learning objectives:**
-
-- Define functionals.
-- Use the `purrr::map()` family of functionals.
-- Use the `purrr::walk()` family of functionals.
-- Use the `purrr::reduce()` and `purrr::accumulate()` family of functionals.
-- Use `purrr::safely()` and `purrr::possibly()` to deal with failure.
-
-9.1. **Introduction**
-
-9.2. **map()**
-
-9.3. **purrr** style
-
-9.4. **map_** variants
-
-9.5. **reduce()** and **accumulate** family of functions
-
-- Some functions that weren't covered
-
-
-## What are functionals {-}
-
-## Introduction
-
-__Functionals__ are functions that take function as input and return a vector as output. Functionals that you probably have used before are: `apply()`, `lapply()` or `tapply()`.
-
-
-- alternatives to loops
-
-- a functional is better than a `for` loop is better than `while` is better than `repeat`
-
-
-### Benefits {-}
-
-
-- encourages function logic to be separated from iteration logic
-
-- can collapse into vectors/data frames easily
-
-
-## Map
-
-`map()` has two arguments, a vector and a function. It performs the function on each element of the vector and returns a list. We can also pass in some additional argument into the function.
-
-```{r,echo=FALSE,warning=FALSE,message=FALSE}
-knitr::include_graphics(path = 'images/9_2_3_map-arg.png')
-```
-
-```{r}
-simple_map <- function(x, f, ...) {
-out <- vector("list", length(x))
-for (i in seq_along(x)) {
-out[[i]] <- f(x[[i]], ...)
-}
-out
-}
-```
-
-## Benefit of using the map function in purrr {-}
-
-- `purrr::map()` is equivalent to `lapply()`
-
-- returns a list and is the most general
-
-- the length of the input == the length of the output
-
-- `map()` is more flexible, with additional arguments allowed
-
-- `map()` has a host of extensions
-
-
-
-```{r load,echo=FALSE,warning=FALSE,message=FALSE}
-library(tidyverse)
-```
-
-## Atomic vectors {-}
-
-
-- has 4 variants to return atomic vectors
- - `map_chr()`
- - `map_dbl()`
- - `map_int()`
- - `map_lgl()`
-
-```{r}
-triple <- function(x) x * 3
-map(.x=1:3, .f=triple)
-
-map_dbl(.x=1:3, .f=triple)
-
-map_lgl(.x=c(1, NA, 3), .f=is.na)
-```
-
-## Anonymous functions and shortcuts {-}
-
- **Anonymous functions**
-```{r}
-map_dbl(.x=mtcars, .f=function(x) mean(x, na.rm = TRUE)) |>
- head()
-```
-
-- the "twiddle" uses a twiddle `~` to set a formula
-- can use `.x` to reference the input `map(.x = ..., .f = )`
-```{r, eval=FALSE}
-map_dbl(.x=mtcars, .f=~mean(.x, na.rm = TRUE))
-```
-
-- can be simplified further as
-```{r}
-map_dbl(.x=mtcars, .f=mean, na.rm = TRUE)
-```
-
-- what happens when we try a handful of variants of the task at hand? (how many unique values are there for each variable?)
-
-Note that `.x` is the **name** of the first argument in `map()` (`.f` is the name of the second argument).
-
-```{r}
-#| error: true
-# the task
-map_dbl(mtcars, function(x) length(unique(x)))
-map_dbl(mtcars, function(unicorn) length(unique(unicorn)))
-map_dbl(mtcars, ~length(unique(.x)))
-map_dbl(mtcars, ~length(unique(..1)))
-map_dbl(mtcars, ~length(unique(.)))
-
-# not the task
-map_dbl(mtcars, length)
-map_dbl(mtcars, length(unique))
-map_dbl(mtcars, 1)
-```
-
-```{r}
-#| echo: false
-#| message: false
-#| warning: false
-rm(x)
-```
-
-```{r}
-#| error: true
-#error
-map_dbl(mtcars, length(unique()))
-map_dbl(mtcars, ~length(unique(x)))
-```
-
-
-## Modify {-}
-
-Sometimes we might want the output to be the same as the input, then in that case we can use the modify function rather than map
-
-```{r}
-df <- data.frame(x=1:3,y=6:4)
-
-map(df, .f=~.x*3)
-
-modify(.x=df,.f=~.x*3)
-```
-
-Note that `modify()` always returns the same type of output (which is not necessarily true with `map()`). Additionally, `modify()` does not actually change the value of `df`.
-
-```{r}
-df
-```
-
-
-## `purrr` style
-
-```{r}
-mtcars |>
- map(head, 20) |> # pull first 20 of each column
- map_dbl(mean) |> # mean of each vector
- head()
-```
-
-An example from `tidytuesday`
-```{r, eval=FALSE}
-#| warning: false
-#| message: false
-
-tt <- tidytuesdayR::tt_load("2020-06-30")
-
-# filter data & exclude columns with lost of nulls
-list_df <-
- map(
- .x = tt[1:3],
- .f =
- ~ .x |>
- filter(issue <= 152 | issue > 200) |>
- mutate(timeframe = ifelse(issue <= 152, "first 5 years", "last 5 years")) |>
- select_if(~mean(is.na(.x)) < 0.2)
- )
-
-
-# write to global environment
-iwalk(
- .x = list_df,
- .f = ~ assign(x = .y, value = .x, envir = globalenv())
-)
-```
-
-## `map_*()` variants
-
-There are many variants
-
-
-
-
-## `map2_*()` {-}
-
-- raise each value `.x` by 2
-
-```{r}
-map_dbl(
- .x = 1:5,
- .f = function(x) x ^ 2
-)
-```
-
-- raise each value `.x` by another value `.y`
-
-```{r}
-map2_dbl(
- .x = 1:5,
- .y = 2:6,
- .f = ~ (.x ^ .y)
-)
-```
-
-
-## The benefit of using the map over apply family of function {-}
-- It is written in C
-- It preserves names
-- We always know the return value type
-- We can apply the function for multiple input values
-- We can pass additional arguments into the function
-
-
-## `walk()` {-}
-
-
-- We use `walk()` when we want to call a function for it side effect(s) rather than its return value, like generating plots, `write.csv()`, or `ggsave()`. If you don't want a return value, `map()` will print more info than you may want.
-
-
-```{r}
-map(1:3, ~cat(.x, "\n"))
-```
-
-- for these cases, use `walk()` instead
-```{r}
-walk(1:3, ~cat(.x, "\n"))
-```
-
-`cat()` does have a result, it's just usually returned invisibly.
-
-```{r}
-cat("hello")
-
-(cat("hello"))
-```
-
-
-We can use `pwalk()` to save a list of plot to disk. Note that the "p" in `pwalk()` means that we have more than 1 (or 2) variables to pipe into the function. Also note that the name of the first argument in all of the "p" functions is now `.l` (instead of `.x`).
-
-```{r}
-plots <- mtcars |>
- split(mtcars$cyl) |>
- map(~ggplot(.x, aes(mpg,wt)) +
- geom_point())
-
-paths <- stringr::str_c(names(plots), '.png')
-
-pwalk(.l = list(paths,plots), .f = ggsave, path = tempdir())
-pmap(.l = list(paths,plots), .f = ggsave, path = tempdir())
-
-```
-
-- walk, walk2 and pwalk all invisibly return .x the first argument. This makes them suitable for use in the middle of pipelines.
-
-- note: I don't think that it is "`.x`" (or "`.l`") that they are returning invisibly. But I'm not sure what it is. Hadley says:
-
-> purrr provides the walk family of functions that ignore the return values of the `.f` and instead return `.x` invisibly.
-
-But not in the first `cat()` example, it is the `NULL` values that get returned invisibly (those aren't the same as `.x`).
-
-## `imap()` {-}
-
-- `imap()` is like `map2()`except that `.y` is derived from `names(.x)` if named or `seq_along(.x)` if not.
-
-- These two produce the same result
-
-```{r}
-imap_chr(.x = mtcars,
- .f = ~ paste(.y, "has a mean of", round(mean(.x), 1))) |>
-head()
-
-map2_chr(.x = mtcars,
- .y = names(mtcars),
- .f = ~ paste(.y, "has a mean of", round(mean(.x), 1))) |>
-head()
-```
-
-
-## `pmap()` {-}
-
-- you can pass a named list or dataframe as arguments to a function
-
-- for example `runif()` has the parameters `n`, `min` and `max`
-
-```{r}
-params <- tibble::tribble(
- ~ n, ~ min, ~ max,
- 1L, 1, 10,
- 2L, 10, 100,
- 3L, 100, 1000
-)
-
-pmap(params, runif)
-```
-
-- could also be
-
-```{r}
-list(
- n = 1:3,
- min = 10 ^ (0:2),
- max = 10 ^ (1:3)
-) |>
-pmap(runif)
-```
-
-- I like to use `expand_grid()` when I want all possible parameter combinations.
-
-```{r}
-expand_grid(n = 1:3,
- min = 10 ^ (0:1),
- max = 10 ^ (1:2))
-
-expand_grid(n = 1:3,
- min = 10 ^ (0:1),
- max = 10 ^ (1:2)) |>
-pmap(runif)
-```
-
-
-
-## `reduce()` family
-
-The `reduce()` function is a powerful functional that allows you to abstract away from a sequence of functions that are applied in a fixed direction.
-
-`reduce()` takes a vector as its first argument, a function as its second argument, and an optional `.init` argument last. It will then apply the function repeatedly to the vector until there is only a single element left.
-
-(Hint: start at the top of the image and read down.)
-
-```{r,echo=FALSE,warning=FALSE,message=FALSE}
-knitr::include_graphics(path = 'images/reduce-init.png')
-```
-
-
-Let me really quickly demonstrate `reduce()` in action.
-
-Say you wanted to add up the numbers 1 through 5 using only the plus operator `+`. You could do something like:
-
-```{r}
-1 + 2 + 3 + 4 + 5
-
-```
-
-Which is the same as:
-
-```{r}
-reduce(1:5, `+`)
-```
-
-And if you want the start value to be something that is not the first argument of the vector, pass that value to the .init argument:
-
-```{r}
-
-identical(
- 0.5 + 1 + 2 + 3 + 4 + 5,
- reduce(1:5, `+`, .init = 0.5)
-)
-
-```
-
-## ggplot2 example with reduce {-}
-
-```{r}
-ggplot(mtcars, aes(hp, mpg)) +
- geom_point(size = 8, alpha = .5, color = "yellow") +
- geom_point(size = 4, alpha = .5, color = "red") +
- geom_point(size = 2, alpha = .5, color = "blue")
-
-```
-
-Let us use the `reduce()` function. Note that `reduce2()` takes two arguments, but the first value (`..1`) is given by the `.init` value.
-
-```{r}
-reduce2(
- c(8, 4, 2),
- c("yellow", "red", "blue"),
- ~ ..1 + geom_point(size = ..2, alpha = .5, color = ..3),
- .init = ggplot(mtcars, aes(hp, mpg))
-)
-
-```
-
-```{r}
-df <- list(age=tibble(name='john',age=30),
- sex=tibble(name=c('john','mary'),sex=c('M','F'),
- trt=tibble(name='Mary',treatment='A')))
-
-df
-
-df |> reduce(.f = full_join)
-
-reduce(.x = df,.f = full_join)
-```
-
-- to see all intermediate steps, use **accumulate()**
-
-```{r}
-set.seed(1234)
-accumulate(1:5, `+`)
-```
-
-```{r}
-accumulate2(
- c(8, 4, 2),
- c("yellow", "red", "blue"),
- ~ ..1 + geom_point(size = ..2, alpha = .5, color = ..3),
- .init = ggplot(mtcars, aes(hp, mpg))
-)
-```
-
-
-## `map_df*()` variants {-}
-
-- `map_dfr()` = row bind the results
-
-- `map_dfc()` = column bind the results
-
-- Note that `map_dfr()` has been superseded by `map() |> list_rbind()` and `map_dfc()` has been superseded by `map() |> list_cbind()`
-
-```{r}
-col_stats <- function(n) {
- head(mtcars, n) |>
- summarise_all(mean) |>
- mutate_all(floor) |>
- mutate(n = paste("N =", n))
-}
-
-map((1:2) * 10, col_stats)
-
-map_dfr((1:2) * 10, col_stats)
-
-map((1:2) * 10, col_stats) |> list_rbind()
-```
-
----
-
-## `pluck()` {-}
-
-- `pluck()` will pull a single element from a list
-
-I like the example from the book because the starting object is not particularly easy to work with (as many JSON objects might not be).
-
-```{r}
-my_list <- list(
- list(-1, x = 1, y = c(2), z = "a"),
- list(-2, x = 4, y = c(5, 6), z = "b"),
- list(-3, x = 8, y = c(9, 10, 11))
-)
-my_list
-```
-
-Notice that the "first element" means something different in standard `pluck()` versus `map`ped `pluck()`.
-
-```{r}
-pluck(my_list, 1)
-
-map(my_list, pluck, 1)
-
-map_dbl(my_list, pluck, 1)
-```
-
-The `map()` functions also have shortcuts for extracting elements from vectors (powered by `purrr::pluck()`). Note that `map(my_list, 3)` is a shortcut for `map(my_list, pluck, 3)`.
-
-```{r}
-#| error: true
-
-# Select by name
-map_dbl(my_list, "x")
-
-# Or by position
-map_dbl(my_list, 1)
-
-# Or by both
-map_dbl(my_list, list("y", 1))
-
-# You'll get an error if you try to retrieve an inside item that doesn't have
-# a consistent format and you want a numeric output
-map_dbl(my_list, list("y"))
-
-
-# You'll get an error if a component doesn't exist:
-map_chr(my_list, "z")
-#> Error: Result 3 must be a single string, not NULL of length 0
-
-# Unless you supply a .default value
-map_chr(my_list, "z", .default = NA)
-#> [1] "a" "b" NA
-```
-
-
-## Not covered: `flatten()` {-}
-
-- `flatten()` will turn a list of lists into a simpler vector.
-
-```{r}
-my_list <-
- list(
- a = 1:3,
- b = list(1:3)
- )
-
-my_list
-
-map_if(my_list, is.list, pluck)
-
-map_if(my_list, is.list, flatten_int)
-
-map_if(my_list, is.list, flatten_int) |>
- flatten_int()
-```
-
-## Dealing with Failures {-}
-
-## Safely {-}
-
-`safely()` is an adverb. It takes a function (a verb) and returns a modified version. In this case, the modified function will never throw an error. Instead it always returns a list with two elements.
-
-- `result` is the original result. If there is an error this will be NULL
-
-- `error` is an error object. If the operation was successful the "`error`" will be NULL.
-
-```{r}
-A <- list(1, 10, "a")
-
-map(.x = A, .f = safely(log))
-
-```
-
-## Possibly {-}
-
-`possibly()` always succeeds. It is simpler than `safely()`, because you can give it a default value to return when there is an error.
-
-```{r}
-A <- list(1,10,"a")
-
-map_dbl(.x = A, .f = possibly(log, otherwise = NA_real_) )
-
-```
-
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/o0a6aJ4kCkU")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/YrZ13_4vUMw")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/DUHXo527mHs")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/SpDpmhW62Ns")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/tYqFMtmhmiI")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/HmDlvnp6uNQ")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:15:49 Matt Dupree: did anyone else lose audio?
-00:15:59 Federica Gazzelloni: not me
-00:16:02 Arthur Shaw: Not me either
-00:16:04 Trevin: okay for me
-00:16:27 Matt Dupree: gonna try rejoining
-00:43:14 Matt Dupree: oh i didn't know they invisibly returned .x! That's useful!
-00:48:29 Arthur Shaw: Very cool trick !
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/t1N6XdidvNo")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:34:09 Ron: Someone did: https://cran.r-project.org/web/packages/comprehenr/vignettes/Introduction.html
-00:47:58 collinberke: https://purrr.tidyverse.org/reference/safely.html
-00:48:24 Ron: it's a function operator !
-00:49:37 Ron: \(x) length(unique(x) is not too verbose though
-00:49:39 Ron: ;)
-01:06:50 collinberke: https://colinfay.me/purrr-mappers/
-01:07:45 collinberke: https://colinfay.me/purrr-web-mining/
-```
-</details>
-
-`r knitr::include_url("https://www.youtube.com/embed/6gY3KZWYC00")`
diff --git a/slides/10.Rmd b/slides/10.Rmd
@@ -0,0 +1,675 @@
+---
+engine: knitr
+title: Function factories
+---
+
+## Learning objectives:
+
+- Understand what a function factory is
+- Recognise how function factories work
+- Learn about non-obvious combination of function features
+- Generate a family of functions from data
+
+```{r, message = FALSE}
+library(rlang)
+library(ggplot2)
+library(scales)
+```
+
+
+## What is a function factory?
+
+
+A **function factory** is a function that makes (returns) functions
+
+Factory made function are **manufactured functions**.
+
+```{r 10-1, echo=FALSE, fig.align='center', fig.dim="50%",fig.alt="https://epsis.com/no/operations-centers-focus-on-ways-of-working/",fig.cap="Function factory | Credits: epsis.com"}
+knitr::include_graphics("images/10-1-factories.png")
+```
+
+
+
+## How does a function factory work?
+```{r 10-2, echo=FALSE, fig.align='center', fig.dim="100%",fig.cap="How does it work? | Credits: kakaakigas.com/how-it-works/"}
+knitr::include_graphics("images/10-2-how.jpg")
+```
+
+```{r 10-ex1}
+power1 <- function(exp) {
+ function(x) {
+ x ^ exp
+ }
+}
+
+square <- power1(2)
+cube <- power1(3)
+```
+`power1()` is the function factory and `square()` and `cube()` are manufactured functions.
+
+## Important to remember
+
+1. R has First-class functions (can be created with `function()` and `<-`)
+
+> R functions are objects in their own right, a language property often called “first-class functions”
+> -- [Section 6.2.3](https://adv-r.hadley.nz/functions.html?q=first%20class#first-class-functions)
+
+2. Functions capture (enclose) environment in which they are created
+
+```{r 10-ex3}
+f <- function(x) function(y) x + y
+fn_env(f) # The function f()
+fn_env(f()) # The function created by f()
+```
+
+3. Functions create a new environment on each run
+```{r 10-ex4}
+f <- function(x) {
+ function() x + 1
+}
+ff <- f(1)
+ff()
+ff()
+```
+
+
+## Fundamentals - Environment
+
+- Environment when function is created defines arguments in the function
+- Use `env_print(fun)` and `fn_env()` to explore
+
+```{r}
+env_print(square)
+fn_env(square)$exp
+```
+
+{width=50% fig-align=center}
+
+## Fundamentals - Forcing
+
+- Lazy evaluation means arguments only evaluated when used
+- "[can] lead to a real head-scratcher of a bug"
+
+```{r}
+x <- 2
+square <- power1(x)
+x <- 3
+square(4)
+```
+
+- *Only applies if passing object as argument*
+- Here argument `2` evaluated when function called
+
+```{r}
+square <- power1(2)
+x <- 3
+square(4)
+```
+
+So use `force()`! (Unless you want it to change with the `x` in the parent environment)
+
+## Forcing - Reiterated
+
+Only required if the argument is **not** evaluated before the new function is created:
+```{r}
+power1 <- function(exp) {
+ stopifnot(is.numeric(exp))
+ function(x) x ^ exp
+}
+
+x <- 2
+square <- power1(x)
+x <- 3
+square(4)
+```
+
+## Fundamentals - Stateful functions
+
+Because
+
+- The enclosing environment is unique and constant, and
+- We have `<<-` (super assignment)
+
+We can *change* that enclosing environment and keep track of that state
+across iterations (!)
+
+- `<-` Assignment in *current* environment
+- `<<-` Assignment in *parent* environment
+
+```{r 10-15}
+new_counter <- function() {
+ i <- 0
+ function() {
+ i <<- i + 1 # second assignment (super assignment)
+ i
+ }
+}
+
+counter_one <- new_counter()
+counter_two <- new_counter()
+c(counter_one(), counter_one(), counter_one())
+c(counter_two(), counter_two(), counter_two())
+```
+
+
+> "As soon as your function starts managing the state of multiple variables, it’s better to switch to R6"
+
+## Fundamentals - Garbage collection
+
+- Because environment is attached to (enclosed by) function, temporary objects
+don't go away.
+
+**Cleaning up** using `rm()` inside a function:
+```{r 10-16}
+f_dirty <- function(n) {
+ x <- runif(n)
+ m <- mean(x)
+ function() m
+}
+
+f_clean <- function(n) {
+ x <- runif(n)
+ m <- mean(x)
+ rm(x) # <---- Important part!
+ function() m
+}
+
+lobstr::obj_size(f_dirty(1e6))
+lobstr::obj_size(f_clean(1e6))
+
+```
+
+
+## Useful Examples - Histograms and binwidth
+
+**Useful when...**
+
+- You need to pass a function
+- You don't want to have to re-write the function every time
+ (the *default* behaviour of the function should be flexible)
+
+
+For example, these bins are not appropriate
+```{r}
+#| fig-asp: 0.3
+sd <- c(1, 5, 15)
+n <- 100
+df <- data.frame(x = rnorm(3 * n, sd = sd), sd = rep(sd, n))
+
+ggplot(df, aes(x)) +
+ geom_histogram(binwidth = 2) +
+ facet_wrap(~ sd, scales = "free_x") +
+ labs(x = NULL)
+```
+
+We could just make a function...
+```{r}
+#| fig-asp: 0.3
+binwidth_bins <- function(x) (max(x) - min(x)) / 20
+
+ggplot(df, aes(x = x)) +
+ geom_histogram(binwidth = binwidth_bins) +
+ facet_wrap(~ sd, scales = "free_x") +
+ labs(x = NULL)
+```
+
+But if we want to change the number of bins (20) we'd have to re-write the function
+each time.
+
+If we use a factory, we don't have to do that.
+```{r}
+#| fig-asp: 0.3
+binwidth_bins <- function(n) {
+ force(n)
+ function(x) (max(x) - min(x)) / n
+}
+
+ggplot(df, aes(x = x)) +
+ geom_histogram(binwidth = binwidth_bins(20)) +
+ facet_wrap(~ sd, scales = "free_x") +
+ labs(x = NULL, title = "20 bins")
+
+ggplot(df, aes(x = x)) +
+ geom_histogram(binwidth = binwidth_bins(5)) +
+ facet_wrap(~ sd, scales = "free_x") +
+ labs(x = NULL, title = "5 bins")
+```
+
+> Similar benefit in Box-cox example
+
+## Useful Examples - Wrapper
+
+**Useful when...**
+
+- You want to create a function that wraps a bunch of other functions
+
+For example, `ggsave()` wraps a bunch of different graphics device functions:
+
+```{r}
+# (Even more simplified)
+plot_dev <- function(ext, dpi = 96) {
+ force(dpi)
+
+ switch(
+ ext,
+ svg = function(filename, ...) svglite::svglite(file = filename, ...),
+ png = function(...) grDevices::png(..., res = dpi, units = "in"),
+ jpg = ,
+ jpeg = function(...) grDevices::jpeg(..., res = dpi, units = "in"),
+ stop("Unknown graphics extension: ", ext, call. = FALSE)
+ )
+}
+```
+
+Then `ggsave()` uses
+
+```
+ggsave <- function(...) {
+ dev <- plot_dev(device, filename, dpi = dpi)
+ ...
+ dev(filename = filename, width = dim[1], height = dim[2], bg = bg, ...)
+ ...
+}
+```
+
+Otherwise, would have to do something like like a bunch of if/else statements.
+
+## Useful Examples - Optimizing
+
+**Useful when...**
+
+- Want to pass function on to `optimise()`/`optimize()`
+- Want to perform pre-computations to speed things up
+- Want to re-use this for other datasets
+
+(*Skipping to final results from section*)
+
+Here, using MLE want to to find the most likely value of lambda for a Poisson distribution
+and this data.
+```{r}
+x1 <- c(41, 30, 31, 38, 29, 24, 30, 29, 31, 38)
+```
+
+We'll create a function that creates a lambda assessment function for a given
+data set.
+
+```{r}
+ll_poisson <- function(x) {
+ n <- length(x)
+ sum_x <- sum(x)
+ c <- sum(lfactorial(x))
+
+ function(lambda) {
+ log(lambda) * sum_x - n * lambda - c
+ }
+}
+```
+
+We can use this on different data sets, but here use ours `x1`
+```{r}
+ll <- ll_poisson(x1)
+ll(10) # Log-probility of a lambda = 10
+```
+
+Use `optimise()` rather than trial and error
+```{r}
+optimise(ll, c(0, 100), maximum = TRUE)
+```
+
+Result: Highest log-probability is -30.3, best lambda is 32.1
+
+
+## Function factories + functionals
+
+Combine functionals and function factories to turn data into many functions.
+
+```{r}
+names <- list(
+ square = 2,
+ cube = 3,
+ root = 1/2,
+ cuberoot = 1/3,
+ reciprocal = -1
+)
+funs <- purrr::map(names, power1)
+names(funs)
+funs$root(64)
+funs$square(3)
+```
+
+Avoid the prefix with
+
+- `with()` - `with(funs, root(100))`
+ - Temporary, clear, short-term
+- `attach()` - `attach(funs)` / `detach(funs)`
+ - Added to search path (like package function), cannot be overwritten, but can be attached multiple times!
+- `rlang::env_bind` - `env_bind(globalenv(), !!!funs)` / `env_unbind(gloablenv(), names(funs))`
+ - Added to global env (like created function), can be overwritten
+
+<!--
+## EXTRA - Previous set of slides
+
+Graphical factories **useful function factories**, such as:
+
+1. Labelling with:
+
+ * formatter functions
+
+```{r 10-19}
+y <- c(12345, 123456, 1234567)
+comma_format()(y)
+```
+```{r 10-20}
+number_format(scale = 1e-3, suffix = " K")(y)
+```
+They are more commonly used inside a ggplot:
+```{r 10-21, include=FALSE}
+df <- data.frame(x = 1, y = y)
+a_ggplot_object <- ggplot(df, aes(x, y)) +
+ geom_point() +
+ scale_x_continuous(breaks = 1, labels = NULL) +
+ labs(x = NULL, y = NULL)
+```
+
+```{r 10-22, eval=T}
+a_ggplot_object +
+ scale_y_continuous(
+ labels = comma_format()
+)
+```
+
+2. Using binwidth in facet histograms
+
+ * binwidth_bins
+
+```{r}
+binwidth_bins <- function(n) {
+ force(n)
+
+ function(x) {
+ (max(x) - min(x)) / n
+ }
+}
+```
+
+Or use a concatenation of this typr of detecting number of bins functions:
+
+ - nclass.Sturges()
+ - nclass.scott()
+ - nclass.FD()
+
+```{r}
+base_bins <- function(type) {
+ fun <- switch(type,
+ Sturges = nclass.Sturges,
+ scott = nclass.scott,
+ FD = nclass.FD,
+ stop("Unknown type", call. = FALSE)
+ )
+
+ function(x) {
+ (max(x) - min(x)) / fun(x)
+ }
+}
+```
+
+
+3. Internals:
+
+ * ggplot2:::plot_dev()
+
+
+## Non-obvious combinations
+
+
+- The **Box-Cox** transformation.
+- **Bootstrap** resampling.
+- **Maximum likelihood** estimation.
+
+
+### Statistical factories
+
+The **Box-Cox** transformation towards normality:
+```{r}
+boxcox1 <- function(x, lambda) {
+ stopifnot(length(lambda) == 1)
+
+ if (lambda == 0) {
+ log(x)
+ } else {
+ (x ^ lambda - 1) / lambda
+ }
+}
+```
+
+
+```{r}
+boxcox2 <- function(lambda) {
+ if (lambda == 0) {
+ function(x) log(x)
+ } else {
+ function(x) (x ^ lambda - 1) / lambda
+ }
+}
+
+stat_boxcox <- function(lambda) {
+ stat_function(aes(colour = lambda), fun = boxcox2(lambda), size = 1)
+}
+
+plot1 <- ggplot(data.frame(x = c(0, 5)), aes(x)) +
+ lapply(c(0.5, 1, 1.5), stat_boxcox) +
+ scale_colour_viridis_c(limits = c(0, 1.5))
+
+# visually, log() does seem to make sense as the transformation
+# for lambda = 0; as values get smaller and smaller, the function
+# gets close and closer to a log transformation
+plot2 <- ggplot(data.frame(x = c(0.01, 1)), aes(x)) +
+ lapply(c(0.5, 0.25, 0.1, 0), stat_boxcox) +
+ scale_colour_viridis_c(limits = c(0, 1.5))
+library(patchwork)
+plot1+plot2
+```
+
+**Bootstrap generators**
+
+
+```{r}
+boot_permute <- function(df, var) {
+ n <- nrow(df)
+ force(var)
+
+ function() {
+ col <- df[[var]]
+ col[sample(n, replace = TRUE)]
+ }
+}
+
+boot_mtcars1 <- boot_permute(mtcars, "mpg")
+head(boot_mtcars1())
+#> [1] 16.4 22.8 22.8 22.8 16.4 19.2
+head(boot_mtcars1())
+#> [1] 17.8 18.7 30.4 30.4 16.4 21.0
+```
+```{r}
+boot_model <- function(df, formula) {
+ mod <- lm(formula, data = df)
+ fitted <- unname(fitted(mod))
+ resid <- unname(resid(mod))
+ rm(mod)
+
+ function() {
+ fitted + sample(resid)
+ }
+}
+
+boot_mtcars2 <- boot_model(mtcars, mpg ~ wt)
+head(boot_mtcars2())
+#> [1] 25.0 24.0 21.7 19.2 24.9 16.0
+head(boot_mtcars2())
+#> [1] 27.4 21.0 20.3 19.4 16.3 21.3
+```
+
+**Maximum likelihood estimation**
+
+$$P(\lambda,x)=\prod_{i=1}^{n}\frac{\lambda^{x_i}e^{-\lambda}}{x_i!}$$
+```{r}
+lprob_poisson <- function(lambda, x) {
+ n <- length(x)
+ (log(lambda) * sum(x)) - (n * lambda) - sum(lfactorial(x))
+}
+```
+
+```{r}
+x1 <- c(41, 30, 31, 38, 29, 24, 30, 29, 31, 38)
+```
+
+```{r}
+lprob_poisson(10, x1)
+#> [1] -184
+lprob_poisson(20, x1)
+#> [1] -61.1
+lprob_poisson(30, x1)
+#> [1] -31
+```
+
+```{r}
+ll_poisson1 <- function(x) {
+ n <- length(x)
+
+ function(lambda) {
+ log(lambda) * sum(x) - n * lambda - sum(lfactorial(x))
+ }
+}
+```
+```{r}
+ll_poisson2 <- function(x) {
+ n <- length(x)
+ sum_x <- sum(x)
+ c <- sum(lfactorial(x))
+
+ function(lambda) {
+ log(lambda) * sum_x - n * lambda - c
+ }
+}
+```
+
+```{r}
+ll1 <- ll_poisson2(x1)
+
+ll1(10)
+#> [1] -184
+ll1(20)
+#> [1] -61.1
+ll1(30)
+#> [1] -31
+```
+```{r}
+optimise(ll1, c(0, 100), maximum = TRUE)
+#> $maximum
+#> [1] 32.1
+#>
+#> $objective
+#> [1] -30.3
+```
+```{r}
+optimise(lprob_poisson, c(0, 100), x = x1, maximum = TRUE)
+#> $maximum
+#> [1] 32.1
+#>
+#> $objective
+#> [1] -30.3
+```
+
+## Function factory applications
+
+
+Combine functionals and function factories to turn data into many functions.
+
+### Function factories + functionals
+```{r}
+names <- list(
+ square = 2,
+ cube = 3,
+ root = 1/2,
+ cuberoot = 1/3,
+ reciprocal = -1
+)
+funs <- purrr::map(names, power1)
+
+funs$root(64)
+#> [1] 8
+funs$root
+#> function(x) {
+#> x ^ exp
+#> }
+#> <bytecode: 0x7fe85512a410>
+#> <environment: 0x7fe85b21f190>
+```
+```{r}
+with(funs, root(100))
+#> [1] 10
+```
+
+```{r}
+attach(funs)
+#> The following objects are masked _by_ .GlobalEnv:
+#>
+#> cube, square
+root(100)
+#> [1] 10
+detach(funs)
+```
+
+
+```{r}
+rlang::env_bind(globalenv(), !!!funs)
+root(100)
+#> [1] 10
+```
+
+```{r}
+rlang::env_unbind(globalenv(), names(funs))
+```
+
+
+-->
+
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/enI5Ynq6olI")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/U-CoF7MCik0")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/qgn7WTITnNs")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/GHp2W4JxVaY")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/8TGXjzi0n0o")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/FUoYwYFqT7Q")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+01:02:25 Trevin: I'm good with combining 👍
+01:02:57 Oluwafemi Oyedele: I agree with combining the chapter!!!
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/7GLyO3IntgE")`
diff --git a/slides/10_Function_factories.Rmd b/slides/10_Function_factories.Rmd
@@ -1,672 +0,0 @@
-# Function factories
-
-**Learning objectives:**
-
-- Understand what a function factory is
-- Recognise how function factories work
-- Learn about non-obvious combination of function features
-- Generate a family of functions from data
-
-```{r, message = FALSE}
-library(rlang)
-library(ggplot2)
-library(scales)
-```
-
-
-## What is a function factory?
-
-
-A **function factory** is a function that makes (returns) functions
-
-Factory made function are **manufactured functions**.
-
-```{r 10-1, echo=FALSE, fig.align='center', fig.dim="50%",fig.alt="https://epsis.com/no/operations-centers-focus-on-ways-of-working/",fig.cap="Function factory | Credits: epsis.com"}
-knitr::include_graphics("images/10-1-factories.png")
-```
-
-
-
-## How does a function factory work?
-```{r 10-2, echo=FALSE, fig.align='center', fig.dim="100%",fig.cap="How does it work? | Credits: kakaakigas.com/how-it-works/"}
-knitr::include_graphics("images/10-2-how.jpg")
-```
-
-```{r 10-ex1}
-power1 <- function(exp) {
- function(x) {
- x ^ exp
- }
-}
-
-square <- power1(2)
-cube <- power1(3)
-```
-`power1()` is the function factory and `square()` and `cube()` are manufactured functions.
-
-## Important to remember
-
-1. R has First-class functions (can be created with `function()` and `<-`)
-
-> R functions are objects in their own right, a language property often called “first-class functions”
-> -- [Section 6.2.3](https://adv-r.hadley.nz/functions.html?q=first%20class#first-class-functions)
-
-2. Functions capture (enclose) environment in which they are created
-
-```{r 10-ex3}
-f <- function(x) function(y) x + y
-fn_env(f) # The function f()
-fn_env(f()) # The function created by f()
-```
-
-3. Functions create a new environment on each run
-```{r 10-ex4}
-f <- function(x) {
- function() x + 1
-}
-ff <- f(1)
-ff()
-ff()
-```
-
-
-## Fundamentals - Environment
-
-- Environment when function is created defines arguments in the function
-- Use `env_print(fun)` and `fn_env()` to explore
-
-```{r}
-env_print(square)
-fn_env(square)$exp
-```
-
-{width=50% fig-align=center}
-
-## Fundamentals - Forcing
-
-- Lazy evaluation means arguments only evaluated when used
-- "[can] lead to a real head-scratcher of a bug"
-
-```{r}
-x <- 2
-square <- power1(x)
-x <- 3
-square(4)
-```
-
-- *Only applies if passing object as argument*
-- Here argument `2` evaluated when function called
-
-```{r}
-square <- power1(2)
-x <- 3
-square(4)
-```
-
-So use `force()`! (Unless you want it to change with the `x` in the parent environment)
-
-## Forcing - Reiterated
-
-Only required if the argument is **not** evaluated before the new function is created:
-```{r}
-power1 <- function(exp) {
- stopifnot(is.numeric(exp))
- function(x) x ^ exp
-}
-
-x <- 2
-square <- power1(x)
-x <- 3
-square(4)
-```
-
-## Fundamentals - Stateful functions
-
-Because
-
-- The enclosing environment is unique and constant, and
-- We have `<<-` (super assignment)
-
-We can *change* that enclosing environment and keep track of that state
-across iterations (!)
-
-- `<-` Assignment in *current* environment
-- `<<-` Assignment in *parent* environment
-
-```{r 10-15}
-new_counter <- function() {
- i <- 0
- function() {
- i <<- i + 1 # second assignment (super assignment)
- i
- }
-}
-
-counter_one <- new_counter()
-counter_two <- new_counter()
-c(counter_one(), counter_one(), counter_one())
-c(counter_two(), counter_two(), counter_two())
-```
-
-
-> "As soon as your function starts managing the state of multiple variables, it’s better to switch to R6"
-
-## Fundamentals - Garbage collection
-
-- Because environment is attached to (enclosed by) function, temporary objects
-don't go away.
-
-**Cleaning up** using `rm()` inside a function:
-```{r 10-16}
-f_dirty <- function(n) {
- x <- runif(n)
- m <- mean(x)
- function() m
-}
-
-f_clean <- function(n) {
- x <- runif(n)
- m <- mean(x)
- rm(x) # <---- Important part!
- function() m
-}
-
-lobstr::obj_size(f_dirty(1e6))
-lobstr::obj_size(f_clean(1e6))
-
-```
-
-
-## Useful Examples - Histograms and binwidth
-
-**Useful when...**
-
-- You need to pass a function
-- You don't want to have to re-write the function every time
- (the *default* behaviour of the function should be flexible)
-
-
-For example, these bins are not appropriate
-```{r}
-#| fig-asp: 0.3
-sd <- c(1, 5, 15)
-n <- 100
-df <- data.frame(x = rnorm(3 * n, sd = sd), sd = rep(sd, n))
-
-ggplot(df, aes(x)) +
- geom_histogram(binwidth = 2) +
- facet_wrap(~ sd, scales = "free_x") +
- labs(x = NULL)
-```
-
-We could just make a function...
-```{r}
-#| fig-asp: 0.3
-binwidth_bins <- function(x) (max(x) - min(x)) / 20
-
-ggplot(df, aes(x = x)) +
- geom_histogram(binwidth = binwidth_bins) +
- facet_wrap(~ sd, scales = "free_x") +
- labs(x = NULL)
-```
-
-But if we want to change the number of bins (20) we'd have to re-write the function
-each time.
-
-If we use a factory, we don't have to do that.
-```{r}
-#| fig-asp: 0.3
-binwidth_bins <- function(n) {
- force(n)
- function(x) (max(x) - min(x)) / n
-}
-
-ggplot(df, aes(x = x)) +
- geom_histogram(binwidth = binwidth_bins(20)) +
- facet_wrap(~ sd, scales = "free_x") +
- labs(x = NULL, title = "20 bins")
-
-ggplot(df, aes(x = x)) +
- geom_histogram(binwidth = binwidth_bins(5)) +
- facet_wrap(~ sd, scales = "free_x") +
- labs(x = NULL, title = "5 bins")
-```
-
-> Similar benefit in Box-cox example
-
-## Useful Examples - Wrapper
-
-**Useful when...**
-
-- You want to create a function that wraps a bunch of other functions
-
-For example, `ggsave()` wraps a bunch of different graphics device functions:
-
-```{r}
-# (Even more simplified)
-plot_dev <- function(ext, dpi = 96) {
- force(dpi)
-
- switch(
- ext,
- svg = function(filename, ...) svglite::svglite(file = filename, ...),
- png = function(...) grDevices::png(..., res = dpi, units = "in"),
- jpg = ,
- jpeg = function(...) grDevices::jpeg(..., res = dpi, units = "in"),
- stop("Unknown graphics extension: ", ext, call. = FALSE)
- )
-}
-```
-
-Then `ggsave()` uses
-
-```
-ggsave <- function(...) {
- dev <- plot_dev(device, filename, dpi = dpi)
- ...
- dev(filename = filename, width = dim[1], height = dim[2], bg = bg, ...)
- ...
-}
-```
-
-Otherwise, would have to do something like like a bunch of if/else statements.
-
-## Useful Examples - Optimizing
-
-**Useful when...**
-
-- Want to pass function on to `optimise()`/`optimize()`
-- Want to perform pre-computations to speed things up
-- Want to re-use this for other datasets
-
-(*Skipping to final results from section*)
-
-Here, using MLE want to to find the most likely value of lambda for a Poisson distribution
-and this data.
-```{r}
-x1 <- c(41, 30, 31, 38, 29, 24, 30, 29, 31, 38)
-```
-
-We'll create a function that creates a lambda assessment function for a given
-data set.
-
-```{r}
-ll_poisson <- function(x) {
- n <- length(x)
- sum_x <- sum(x)
- c <- sum(lfactorial(x))
-
- function(lambda) {
- log(lambda) * sum_x - n * lambda - c
- }
-}
-```
-
-We can use this on different data sets, but here use ours `x1`
-```{r}
-ll <- ll_poisson(x1)
-ll(10) # Log-probility of a lambda = 10
-```
-
-Use `optimise()` rather than trial and error
-```{r}
-optimise(ll, c(0, 100), maximum = TRUE)
-```
-
-Result: Highest log-probability is -30.3, best lambda is 32.1
-
-
-## Function factories + functionals
-
-Combine functionals and function factories to turn data into many functions.
-
-```{r}
-names <- list(
- square = 2,
- cube = 3,
- root = 1/2,
- cuberoot = 1/3,
- reciprocal = -1
-)
-funs <- purrr::map(names, power1)
-names(funs)
-funs$root(64)
-funs$square(3)
-```
-
-Avoid the prefix with
-
-- `with()` - `with(funs, root(100))`
- - Temporary, clear, short-term
-- `attach()` - `attach(funs)` / `detach(funs)`
- - Added to search path (like package function), cannot be overwritten, but can be attached multiple times!
-- `rlang::env_bind` - `env_bind(globalenv(), !!!funs)` / `env_unbind(gloablenv(), names(funs))`
- - Added to global env (like created function), can be overwritten
-
-<!--
-## EXTRA - Previous set of slides
-
-Graphical factories **useful function factories**, such as:
-
-1. Labelling with:
-
- * formatter functions
-
-```{r 10-19}
-y <- c(12345, 123456, 1234567)
-comma_format()(y)
-```
-```{r 10-20}
-number_format(scale = 1e-3, suffix = " K")(y)
-```
-They are more commonly used inside a ggplot:
-```{r 10-21, include=FALSE}
-df <- data.frame(x = 1, y = y)
-a_ggplot_object <- ggplot(df, aes(x, y)) +
- geom_point() +
- scale_x_continuous(breaks = 1, labels = NULL) +
- labs(x = NULL, y = NULL)
-```
-
-```{r 10-22, eval=T}
-a_ggplot_object +
- scale_y_continuous(
- labels = comma_format()
-)
-```
-
-2. Using binwidth in facet histograms
-
- * binwidth_bins
-
-```{r}
-binwidth_bins <- function(n) {
- force(n)
-
- function(x) {
- (max(x) - min(x)) / n
- }
-}
-```
-
-Or use a concatenation of this typr of detecting number of bins functions:
-
- - nclass.Sturges()
- - nclass.scott()
- - nclass.FD()
-
-```{r}
-base_bins <- function(type) {
- fun <- switch(type,
- Sturges = nclass.Sturges,
- scott = nclass.scott,
- FD = nclass.FD,
- stop("Unknown type", call. = FALSE)
- )
-
- function(x) {
- (max(x) - min(x)) / fun(x)
- }
-}
-```
-
-
-3. Internals:
-
- * ggplot2:::plot_dev()
-
-
-## Non-obvious combinations
-
-
-- The **Box-Cox** transformation.
-- **Bootstrap** resampling.
-- **Maximum likelihood** estimation.
-
-
-### Statistical factories
-
-The **Box-Cox** transformation towards normality:
-```{r}
-boxcox1 <- function(x, lambda) {
- stopifnot(length(lambda) == 1)
-
- if (lambda == 0) {
- log(x)
- } else {
- (x ^ lambda - 1) / lambda
- }
-}
-```
-
-
-```{r}
-boxcox2 <- function(lambda) {
- if (lambda == 0) {
- function(x) log(x)
- } else {
- function(x) (x ^ lambda - 1) / lambda
- }
-}
-
-stat_boxcox <- function(lambda) {
- stat_function(aes(colour = lambda), fun = boxcox2(lambda), size = 1)
-}
-
-plot1 <- ggplot(data.frame(x = c(0, 5)), aes(x)) +
- lapply(c(0.5, 1, 1.5), stat_boxcox) +
- scale_colour_viridis_c(limits = c(0, 1.5))
-
-# visually, log() does seem to make sense as the transformation
-# for lambda = 0; as values get smaller and smaller, the function
-# gets close and closer to a log transformation
-plot2 <- ggplot(data.frame(x = c(0.01, 1)), aes(x)) +
- lapply(c(0.5, 0.25, 0.1, 0), stat_boxcox) +
- scale_colour_viridis_c(limits = c(0, 1.5))
-library(patchwork)
-plot1+plot2
-```
-
-**Bootstrap generators**
-
-
-```{r}
-boot_permute <- function(df, var) {
- n <- nrow(df)
- force(var)
-
- function() {
- col <- df[[var]]
- col[sample(n, replace = TRUE)]
- }
-}
-
-boot_mtcars1 <- boot_permute(mtcars, "mpg")
-head(boot_mtcars1())
-#> [1] 16.4 22.8 22.8 22.8 16.4 19.2
-head(boot_mtcars1())
-#> [1] 17.8 18.7 30.4 30.4 16.4 21.0
-```
-```{r}
-boot_model <- function(df, formula) {
- mod <- lm(formula, data = df)
- fitted <- unname(fitted(mod))
- resid <- unname(resid(mod))
- rm(mod)
-
- function() {
- fitted + sample(resid)
- }
-}
-
-boot_mtcars2 <- boot_model(mtcars, mpg ~ wt)
-head(boot_mtcars2())
-#> [1] 25.0 24.0 21.7 19.2 24.9 16.0
-head(boot_mtcars2())
-#> [1] 27.4 21.0 20.3 19.4 16.3 21.3
-```
-
-**Maximum likelihood estimation**
-
-$$P(\lambda,x)=\prod_{i=1}^{n}\frac{\lambda^{x_i}e^{-\lambda}}{x_i!}$$
-```{r}
-lprob_poisson <- function(lambda, x) {
- n <- length(x)
- (log(lambda) * sum(x)) - (n * lambda) - sum(lfactorial(x))
-}
-```
-
-```{r}
-x1 <- c(41, 30, 31, 38, 29, 24, 30, 29, 31, 38)
-```
-
-```{r}
-lprob_poisson(10, x1)
-#> [1] -184
-lprob_poisson(20, x1)
-#> [1] -61.1
-lprob_poisson(30, x1)
-#> [1] -31
-```
-
-```{r}
-ll_poisson1 <- function(x) {
- n <- length(x)
-
- function(lambda) {
- log(lambda) * sum(x) - n * lambda - sum(lfactorial(x))
- }
-}
-```
-```{r}
-ll_poisson2 <- function(x) {
- n <- length(x)
- sum_x <- sum(x)
- c <- sum(lfactorial(x))
-
- function(lambda) {
- log(lambda) * sum_x - n * lambda - c
- }
-}
-```
-
-```{r}
-ll1 <- ll_poisson2(x1)
-
-ll1(10)
-#> [1] -184
-ll1(20)
-#> [1] -61.1
-ll1(30)
-#> [1] -31
-```
-```{r}
-optimise(ll1, c(0, 100), maximum = TRUE)
-#> $maximum
-#> [1] 32.1
-#>
-#> $objective
-#> [1] -30.3
-```
-```{r}
-optimise(lprob_poisson, c(0, 100), x = x1, maximum = TRUE)
-#> $maximum
-#> [1] 32.1
-#>
-#> $objective
-#> [1] -30.3
-```
-
-## Function factory applications
-
-
-Combine functionals and function factories to turn data into many functions.
-
-### Function factories + functionals
-```{r}
-names <- list(
- square = 2,
- cube = 3,
- root = 1/2,
- cuberoot = 1/3,
- reciprocal = -1
-)
-funs <- purrr::map(names, power1)
-
-funs$root(64)
-#> [1] 8
-funs$root
-#> function(x) {
-#> x ^ exp
-#> }
-#> <bytecode: 0x7fe85512a410>
-#> <environment: 0x7fe85b21f190>
-```
-```{r}
-with(funs, root(100))
-#> [1] 10
-```
-
-```{r}
-attach(funs)
-#> The following objects are masked _by_ .GlobalEnv:
-#>
-#> cube, square
-root(100)
-#> [1] 10
-detach(funs)
-```
-
-
-```{r}
-rlang::env_bind(globalenv(), !!!funs)
-root(100)
-#> [1] 10
-```
-
-```{r}
-rlang::env_unbind(globalenv(), names(funs))
-```
-
-
--->
-
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/enI5Ynq6olI")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/U-CoF7MCik0")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/qgn7WTITnNs")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/GHp2W4JxVaY")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/8TGXjzi0n0o")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/FUoYwYFqT7Q")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-01:02:25 Trevin: I'm good with combining 👍
-01:02:57 Oluwafemi Oyedele: I agree with combining the chapter!!!
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/7GLyO3IntgE")`
diff --git a/slides/11.Rmd b/slides/11.Rmd
@@ -0,0 +1,257 @@
+---
+engine: knitr
+title: Function operators
+---
+
+## Learning objectives:
+
+- Define function operator
+- Explore some existing function operators
+- Make our own function operator
+
+
+
+## Introduction
+
+<!--- ```{r 10-01, fig.align='center',fig.dim="50%", fig.cap="Credits: 2001-2003 Michael P.Frank (https://slideplayer.com/slide/17666226/)",echo=FALSE}
+
+knitr::include_graphics("images/11-maths_example.png")
+``` --->
+
+- A **function operator** is a function that takes one (or more) functions as input and returns a function as output.
+
+- Function operators are a special case of **function factories**, since they return functions.
+
+- They are often used to wrap an existing function to provide additional capability, similar to python's **decorators**.
+
+```{r 11-01_0}
+chatty <- function(f) {
+ force(f)
+
+ function(x, ...) {
+ res <- f(x, ...)
+ cat("Processing ", x, "\n", sep = "")
+ res
+ }
+}
+
+f <- function(x) x ^ 2
+s <- c(3, 2, 1)
+
+purrr::map_dbl(s, chatty(f))
+
+```
+
+## Existing function operators
+
+Two function operator examples are `purrr:safely()` and `memoise::memoise()`. These can be found in `purr` and `memoise`:
+
+```{r 11-01_1}
+library(purrr)
+library(memoise)
+```
+
+## purrr::safely {-}
+
+Capturing Errors: turns errors into data!
+
+
+```{r 11-02_0}
+x <- list(
+ c(0.512, 0.165, 0.717),
+ c(0.064, 0.781, 0.427),
+ c(0.890, 0.785, 0.495),
+ "oops"
+)
+```
+
+```{r 11-02_0b, eval=FALSE}
+map_dbl(x, sum)
+#> Error in .Primitive("sum")(..., na.rm = na.rm): invalid 'type' (character) of
+#> argument
+```
+
+
+```{r 11-02_0c}
+# note use of map (not map_dbl), safely returns a lisst
+
+out <- map(x, safely(sum))
+str(transpose(out))
+```
+
+
+
+## Other `purrr` function operators {-}
+
+<!---
+```{r 11-02, echo=FALSE,fig.align='center', fig.cap="Credits: www.nextptr.com"}
+knitr::include_graphics("images/11-function_operators.png")
+```
+--->
+
+> purrr comes with three other function operators in a similar vein:
+
+
+ possibly(): returns a default value when there’s an error. It provides no way to tell if an error occured or not, so it’s best reserved for cases when there’s some obvious sentinel value (like NA).
+
+ quietly(): turns output, messages, and warning side-effects into output, message, and warning components of the output.
+
+ auto_browser(): automatically executes browser() inside the function when there’s an error.
+
+
+## memoise::memoise {-}
+
+Caching computations: avoid repeated computations!
+
+
+```{r 11-02_01}
+slow_function <- function(x) {
+ Sys.sleep(1)
+ x * 10 * runif(1)
+}
+system.time(print(slow_function(1)))
+system.time(print(slow_function(1)))
+```
+
+```{r 11-02_02}
+fast_function <- memoise::memoise(slow_function)
+system.time(print(fast_function(1)))
+system.time(print(fast_function(1)))
+```
+
+> Be careful about memoising impure functions!
+
+## Exercise {-}
+
+How does `safely()` work?
+The source code looks like this:
+
+```{r 11-02_exp1}
+safely
+```
+
+The real work is done in `capture_error` which is defined in the package **namespace**. We can access it with the `:::` operator. (Could also grab it from the function's environment.)
+
+```{r 11-02_exp2}
+purrr:::capture_error
+```
+
+## Case study: make your own function operator
+
+
+```{r 11-03_01,eval=FALSE}
+urls <- c(
+ "adv-r" = "https://adv-r.hadley.nz",
+ "r4ds" = "http://r4ds.had.co.nz/"
+ # and many many more
+)
+path <- paste(tempdir(), names(urls), ".html")
+
+walk2(urls, path, download.file, quiet = TRUE)
+```
+
+
+Here we make a function operator that add a little delay in reading each page:
+
+```{r 11-03_02}
+delay_by <- function(f, amount) {
+ force(f)
+ force(amount)
+
+ function(...) {
+ Sys.sleep(amount)
+ f(...)
+ }
+}
+system.time(runif(100))
+
+system.time(delay_by(runif, 0.1)(100))
+
+```
+
+
+And another to add a dot after nth invocation:
+
+```{r 11_03-04}
+dot_every <- function(f, n) {
+ force(f)
+ force(n)
+
+ i <- 0
+ function(...) {
+ i <<- i + 1
+ if (i %% n == 0) cat(".")
+ f(...)
+ }
+}
+
+walk(1:100, dot_every(runif, 10))
+
+```
+
+Can now use both of these function operators to express our desired result:
+
+```{r 11-03_05, eval=FALSE}
+walk2(
+ urls, path,
+ download.file %>% dot_every(10) %>% delay_by(0.1),
+ quiet = TRUE
+)
+```
+
+## Exercise {-}
+
+2) Should you memoise file.download? Why or why not?
+
+
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/zzUY03gt_pA")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/fD1QJB2pHik")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/Re6y5CQzwG4")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/rVooJFdbePs")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/XOurCfeJLGc")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/EPs57es2MsE")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:01:42 Oluwafemi Oyedele: Hi, Good Evening !!!
+00:05:52 Arthur Shaw: @federica, love the hex stickers behind you. All from rstudio::conf?
+00:07:12 Arthur Shaw: I tried doing the same. I had a hard time ordering them. I also thought I'd make the stickers into magnets so that I could rearrange them in future.
+00:48:34 Oluwafemi Oyedele: Thank you !!!
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/WDehjcuc7xs")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:18:21 collinberke: Jenny Bryan debugging: https://www.youtube.com/watch?v=vgYS-F8opgE
+00:31:10 collinberke: https://purrr.tidyverse.org/reference/slowly.html
+00:47:43 Robert Hilly: By guys!
+```
+</details>
diff --git a/slides/11_Function_operators.Rmd b/slides/11_Function_operators.Rmd
@@ -1,254 +0,0 @@
-# Function operators
-
-**Learning objectives:**
-
-- Define function operator
-- Explore some existing function operators
-- Make our own function operator
-
-
-
-## Introduction
-
-<!--- ```{r 10-01, fig.align='center',fig.dim="50%", fig.cap="Credits: 2001-2003 Michael P.Frank (https://slideplayer.com/slide/17666226/)",echo=FALSE}
-
-knitr::include_graphics("images/11-maths_example.png")
-``` --->
-
-- A **function operator** is a function that takes one (or more) functions as input and returns a function as output.
-
-- Function operators are a special case of **function factories**, since they return functions.
-
-- They are often used to wrap an existing function to provide additional capability, similar to python's **decorators**.
-
-```{r 11-01_0}
-chatty <- function(f) {
- force(f)
-
- function(x, ...) {
- res <- f(x, ...)
- cat("Processing ", x, "\n", sep = "")
- res
- }
-}
-
-f <- function(x) x ^ 2
-s <- c(3, 2, 1)
-
-purrr::map_dbl(s, chatty(f))
-
-```
-
-## Existing function operators
-
-Two function operator examples are `purrr:safely()` and `memoise::memoise()`. These can be found in `purr` and `memoise`:
-
-```{r 11-01_1}
-library(purrr)
-library(memoise)
-```
-
-## purrr::safely {-}
-
-Capturing Errors: turns errors into data!
-
-
-```{r 11-02_0}
-x <- list(
- c(0.512, 0.165, 0.717),
- c(0.064, 0.781, 0.427),
- c(0.890, 0.785, 0.495),
- "oops"
-)
-```
-
-```{r 11-02_0b, eval=FALSE}
-map_dbl(x, sum)
-#> Error in .Primitive("sum")(..., na.rm = na.rm): invalid 'type' (character) of
-#> argument
-```
-
-
-```{r 11-02_0c}
-# note use of map (not map_dbl), safely returns a lisst
-
-out <- map(x, safely(sum))
-str(transpose(out))
-```
-
-
-
-## Other `purrr` function operators {-}
-
-<!---
-```{r 11-02, echo=FALSE,fig.align='center', fig.cap="Credits: www.nextptr.com"}
-knitr::include_graphics("images/11-function_operators.png")
-```
---->
-
-> purrr comes with three other function operators in a similar vein:
-
-
- possibly(): returns a default value when there’s an error. It provides no way to tell if an error occured or not, so it’s best reserved for cases when there’s some obvious sentinel value (like NA).
-
- quietly(): turns output, messages, and warning side-effects into output, message, and warning components of the output.
-
- auto_browser(): automatically executes browser() inside the function when there’s an error.
-
-
-## memoise::memoise {-}
-
-Caching computations: avoid repeated computations!
-
-
-```{r 11-02_01}
-slow_function <- function(x) {
- Sys.sleep(1)
- x * 10 * runif(1)
-}
-system.time(print(slow_function(1)))
-system.time(print(slow_function(1)))
-```
-
-```{r 11-02_02}
-fast_function <- memoise::memoise(slow_function)
-system.time(print(fast_function(1)))
-system.time(print(fast_function(1)))
-```
-
-> Be careful about memoising impure functions!
-
-## Exercise {-}
-
-How does `safely()` work?
-The source code looks like this:
-
-```{r 11-02_exp1}
-safely
-```
-
-The real work is done in `capture_error` which is defined in the package **namespace**. We can access it with the `:::` operator. (Could also grab it from the function's environment.)
-
-```{r 11-02_exp2}
-purrr:::capture_error
-```
-
-## Case study: make your own function operator
-
-
-```{r 11-03_01,eval=FALSE}
-urls <- c(
- "adv-r" = "https://adv-r.hadley.nz",
- "r4ds" = "http://r4ds.had.co.nz/"
- # and many many more
-)
-path <- paste(tempdir(), names(urls), ".html")
-
-walk2(urls, path, download.file, quiet = TRUE)
-```
-
-
-Here we make a function operator that add a little delay in reading each page:
-
-```{r 11-03_02}
-delay_by <- function(f, amount) {
- force(f)
- force(amount)
-
- function(...) {
- Sys.sleep(amount)
- f(...)
- }
-}
-system.time(runif(100))
-
-system.time(delay_by(runif, 0.1)(100))
-
-```
-
-
-And another to add a dot after nth invocation:
-
-```{r 11_03-04}
-dot_every <- function(f, n) {
- force(f)
- force(n)
-
- i <- 0
- function(...) {
- i <<- i + 1
- if (i %% n == 0) cat(".")
- f(...)
- }
-}
-
-walk(1:100, dot_every(runif, 10))
-
-```
-
-Can now use both of these function operators to express our desired result:
-
-```{r 11-03_05, eval=FALSE}
-walk2(
- urls, path,
- download.file %>% dot_every(10) %>% delay_by(0.1),
- quiet = TRUE
-)
-```
-
-## Exercise {-}
-
-2) Should you memoise file.download? Why or why not?
-
-
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/zzUY03gt_pA")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/fD1QJB2pHik")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/Re6y5CQzwG4")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/rVooJFdbePs")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/XOurCfeJLGc")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/EPs57es2MsE")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:01:42 Oluwafemi Oyedele: Hi, Good Evening !!!
-00:05:52 Arthur Shaw: @federica, love the hex stickers behind you. All from rstudio::conf?
-00:07:12 Arthur Shaw: I tried doing the same. I had a hard time ordering them. I also thought I'd make the stickers into magnets so that I could rearrange them in future.
-00:48:34 Oluwafemi Oyedele: Thank you !!!
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/WDehjcuc7xs")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:18:21 collinberke: Jenny Bryan debugging: https://www.youtube.com/watch?v=vgYS-F8opgE
-00:31:10 collinberke: https://purrr.tidyverse.org/reference/slowly.html
-00:47:43 Robert Hilly: By guys!
-```
-</details>
diff --git a/slides/12.Rmd b/slides/12.Rmd
@@ -0,0 +1,393 @@
+---
+engine: knitr
+title: Base types
+---
+
+## Learning objectives:
+
+- Understand what OOP means--at the very least for R
+- Know how to discern an object's nature--base or OO--and type
+
+
+
+<details>
+<summary>Session Info</summary>
+```{r}
+library("DiagrammeR")
+```
+
+```{r}
+utils::sessionInfo()
+```
+
+</details>
+
+
+## Why OOP is hard in R
+
+- Multiple OOP systems exist: S3, R6, S4, and (now/soon) S7.
+- Multiple preferences: some users prefer one system; others, another.
+- R's OOP systems are different enough that prior OOP experience may not transfer well.
+
+[](https://xkcd.com/927/)
+
+
+## OOP: Big Ideas
+
+1. **Polymorphism.** Function has a single interface (outside), but contains (inside) several class-specific implementations.
+```{r, eval=FALSE}
+# imagine a function with object x as an argument
+# from the outside, users interact with the same function
+# but inside the function, there are provisions to deal with objects of different classes
+some_function <- function(x) {
+ if is.numeric(x) {
+ # implementation for numeric x
+ } else if is.character(x) {
+ # implementation for character x
+ } ...
+}
+```
+
+<details>
+<summary>Example of polymorphism</summary>
+
+```{r polymorphism_example}
+# data frame
+summary(mtcars[,1:4])
+
+# statistical model
+lin_fit <- lm(mpg ~ hp, data = mtcars)
+summary(lin_fit)
+```
+
+</details>
+
+2. **Encapsulation.** Function "encapsulates"--that is, encloses in an inviolate capsule--both data and how it acts on data. Think of a REST API: a client interacts with with an API only through a set of discrete endpoints (i.e., things to get or set), but the server does not otherwise give access to its internal workings or state. Like with an API, this creates a separation of concerns: OOP functions take inputs and yield results; users only consume those results.
+
+## OOP: Properties
+
+### Objects have class
+
+- Class defines:
+ - Method (i.e., what can be done with object)
+ - Fields (i.e., data that defines an instance of the class)
+- Objects are an instance of a class
+
+### Class is inherited
+
+- Class is defined:
+ - By an object's class (e.g., ordered factor)
+ - By the parent of the object's class (e.g., factor)
+- Inheritance matters for method dispatch
+ - If a method is defined for an object's class, use that method
+ - If an object doesn't have a method, use the method of the parent class
+ - The process of finding a method, is called dispatch
+
+## OOP in R: Two Paradigms
+
+**1. Encapsulated OOP**
+
+- Objects "encapsulate"
+ - Methods (i.e., what can be done)
+ - Fields (i.e., data on which things are done)
+- Calls communicate this encapsulation, since form follows function
+ - Form: `object.method(arg1, arg2)`
+ - Function: for `object`, apply `method` for `object`'s class with arguments `arg1` and `arg2`
+
+**2. Functional OOP**
+
+- Methods belong to "generic" functions
+- From the outside, look like regular functions: `generic(object, arg2, arg3)`
+- From the inside, components are also functions
+
+### Concept Map
+
+```{r, echo = FALSE, eval = TRUE}
+DiagrammeR::mermaid("
+graph LR
+
+OOP --> encapsulated_OOP
+OOP --> functional_OOP
+
+functional_OOP --> S3
+functional_OOP --> S4
+
+encapsulated_OOP --> R6
+encapsulated_OOP --> RC
+")
+```
+
+<details>
+<summary>Mermaid code</summary>
+```{r, echo = TRUE, eval = FALSE}
+DiagrammeR::mermaid("
+graph LR
+
+OOP --> encapsulated_OOP
+OOP --> functional_OOP
+
+functional_OOP --> S3
+functional_OOP --> S4
+
+encapsulated_OOP --> R6
+encapsulated_OOP --> RC
+")
+```
+</details>
+
+## OOP in base R
+
+- **S3**
+ - Paradigm: functional OOP
+ - Noteworthy: R's first OOP system
+ - Use case: low-cost solution for common problems
+ - Downsides: no guarantees
+- **S4**
+ - Paradigm: functional OOP
+ - Noteworthy: rewrite of S3, used by `Bioconductor`
+ - Use case: "more guarantees and greater encapsulation" than S3
+ - Downsides: higher setup cost than S3
+- **RC**
+ - Paradigm: encapsulated OOP
+ - Noteworthy: special type of S4 object is mutable--in other words, that can be modified in place (instead of R's usual copy-on-modify behavior)
+ - Use cases: problems that are hard to tackle with functional OOP (in S3 and S4)
+ - Downsides: harder to reason about (because of modify-in-place logic)
+
+## OOP in packages
+
+- **R6**
+ - Paradigm: encapsulated OOP
+ - Noteworthy: resolves issues with RC
+- **R7**
+ - Paradigm: functional OOP
+ - Noteworthy:
+ - best parts of S3 and S4
+ - ease of S3
+ - power of S4
+ - See more in [rstudio::conf(2022) talk](https://www.rstudio.com/conference/2022/talks/introduction-to-r7/)
+- **R.oo**
+ - Paradigm: hybrid functional and encapsulated (?)
+- **proto**
+ - Paradigm: prototype OOP
+ - Noteworthy: OOP style used in `ggplot2`
+
+## How can you tell if an object is base or OOP?
+
+### Functions
+
+Two functions:
+
+- `base::is.object()`, which yields TRUE/FALSE about whether is OOP object
+- `sloop::otype()`, which says what type of object type: `"base"`, `"S3"`, etc.
+
+An few examples:
+
+```{r}
+# Example 1: a base object
+is.object(1:10)
+sloop::otype(1:10)
+
+# Example 2: an OO object
+is.object(mtcars)
+sloop::otype(mtcars)
+```
+
+### sloop
+
+* **S** **L**anguage **O**bject-**O**riented **P**rogramming
+
+[](https://en.wikipedia.org/wiki/Sloop_John_B)
+
+### Class
+
+OO objects have a "class" attribute:
+
+```{r}
+# base object has no class
+attr(1:10, "class")
+
+# OO object has one or more classes
+attr(mtcars, "class")
+```
+
+## What about types?
+
+Only OO objects have a "class" attribute, but every object--whether base or OO--has class
+
+### Vectors
+
+```{r}
+typeof(NULL)
+typeof(c("a", "b", "c"))
+typeof(1L)
+typeof(1i)
+```
+
+
+### Functions
+
+```{r}
+# "normal" function
+my_fun <- function(x) { x + 1 }
+typeof(my_fun)
+# internal function
+typeof(`[`)
+# primitive function
+typeof(sum)
+```
+
+### Environments
+
+```{r}
+typeof(globalenv())
+```
+
+
+### S4
+
+```{r}
+mle_obj <- stats4::mle(function(x = 1) (x - 2) ^ 2)
+typeof(mle_obj)
+```
+
+
+### Language components
+
+```{r}
+typeof(quote(a))
+typeof(quote(a + 1))
+typeof(formals(my_fun))
+```
+
+### Concept Map
+
+
+
+<details>
+<summary>Sankey graph code</summary>
+
+The graph above was made with [SankeyMATIC](https://sankeymatic.com/)
+
+```
+// toggle "Show Values"
+// set Default Flow Colors from "each flow's Source"
+
+base\ntypes [8] vectors
+base\ntypes [3] functions
+base\ntypes [1] environments
+base\ntypes [1] S4 OOP
+base\ntypes [3] language\ncomponents
+base\ntypes [6] C components
+
+vectors [1] NULL
+vectors [1] logical
+vectors [1] integer
+vectors [1] double
+vectors [1] complex
+vectors [1] character
+vectors [1] list
+vectors [1] raw
+
+functions [1] closure
+functions [1] special
+functions [1] builtin
+
+environments [1] environment
+
+S4 OOP [1] S4
+
+language\ncomponents [1] symbol
+language\ncomponents [1] language
+language\ncomponents [1] pairlist
+
+C components [1] externalptr
+C components [1] weakref
+C components [1] bytecode
+C components [1] promise
+C components [1] ...
+C components [1] any
+```
+
+</details>
+
+## Be careful about the numeric type
+
+1. Often "numeric" is treated as synonymous for double:
+
+```{r}
+# create a double and integeger objects
+one <- 1
+oneL <- 1L
+typeof(one)
+typeof(oneL)
+
+# check their type after as.numeric()
+one |> as.numeric() |> typeof()
+oneL |> as.numeric() |> typeof()
+```
+
+2. In S3 and S4, "numeric" is taken as either integer or double, when choosing methods:
+
+```{r}
+sloop::s3_class(1)
+sloop::s3_class(1L)
+```
+
+3. `is.numeric()` tests whether an object behaves like a number
+
+```{r}
+typeof(factor("x"))
+is.numeric(factor("x"))
+```
+
+But Advanced R consistently uses numeric to mean integer or double type.
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/Fy3JF5Em6qY")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/9GkgNC15EAw")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/IL6iJhAsZAY")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/4la5adcWwKE")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/NeHtEGab1Og")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/rfidR7tI_nQ")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:35:02 Trevin: sloop (“sail the seas of OOP”)
+00:42:40 Ryan Metcalf: Awesome input Trevin! I jumped to the vignette, but didn't see the reference directly.
+01:00:01 Trevin: If you're interested there may be a new “R Packages" cohort starting up soon (also a new version of the book coming out soonish as well?)
+01:08:23 Oluwafemi Oyedele: Thank you !!!
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/mOpmvc9h_4M")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:35:43 Stone: base::InternalMethods
+00:48:04 collinberke: https://cran.r-project.org/doc/manuals/R-exts.html
+```
+</details>
diff --git a/slides/12_Base_types.Rmd b/slides/12_Base_types.Rmd
@@ -1,390 +0,0 @@
-# Base types
-
-**Learning objectives:**
-
-- Understand what OOP means--at the very least for R
-- Know how to discern an object's nature--base or OO--and type
-
-
-
-<details>
-<summary>Session Info</summary>
-```{r}
-library("DiagrammeR")
-```
-
-```{r}
-utils::sessionInfo()
-```
-
-</details>
-
-
-## Why OOP is hard in R
-
-- Multiple OOP systems exist: S3, R6, S4, and (now/soon) S7.
-- Multiple preferences: some users prefer one system; others, another.
-- R's OOP systems are different enough that prior OOP experience may not transfer well.
-
-[](https://xkcd.com/927/)
-
-
-## OOP: Big Ideas
-
-1. **Polymorphism.** Function has a single interface (outside), but contains (inside) several class-specific implementations.
-```{r, eval=FALSE}
-# imagine a function with object x as an argument
-# from the outside, users interact with the same function
-# but inside the function, there are provisions to deal with objects of different classes
-some_function <- function(x) {
- if is.numeric(x) {
- # implementation for numeric x
- } else if is.character(x) {
- # implementation for character x
- } ...
-}
-```
-
-<details>
-<summary>Example of polymorphism</summary>
-
-```{r polymorphism_example}
-# data frame
-summary(mtcars[,1:4])
-
-# statistical model
-lin_fit <- lm(mpg ~ hp, data = mtcars)
-summary(lin_fit)
-```
-
-</details>
-
-2. **Encapsulation.** Function "encapsulates"--that is, encloses in an inviolate capsule--both data and how it acts on data. Think of a REST API: a client interacts with with an API only through a set of discrete endpoints (i.e., things to get or set), but the server does not otherwise give access to its internal workings or state. Like with an API, this creates a separation of concerns: OOP functions take inputs and yield results; users only consume those results.
-
-## OOP: Properties
-
-### Objects have class
-
-- Class defines:
- - Method (i.e., what can be done with object)
- - Fields (i.e., data that defines an instance of the class)
-- Objects are an instance of a class
-
-### Class is inherited
-
-- Class is defined:
- - By an object's class (e.g., ordered factor)
- - By the parent of the object's class (e.g., factor)
-- Inheritance matters for method dispatch
- - If a method is defined for an object's class, use that method
- - If an object doesn't have a method, use the method of the parent class
- - The process of finding a method, is called dispatch
-
-## OOP in R: Two Paradigms
-
-**1. Encapsulated OOP**
-
-- Objects "encapsulate"
- - Methods (i.e., what can be done)
- - Fields (i.e., data on which things are done)
-- Calls communicate this encapsulation, since form follows function
- - Form: `object.method(arg1, arg2)`
- - Function: for `object`, apply `method` for `object`'s class with arguments `arg1` and `arg2`
-
-**2. Functional OOP**
-
-- Methods belong to "generic" functions
-- From the outside, look like regular functions: `generic(object, arg2, arg3)`
-- From the inside, components are also functions
-
-### Concept Map
-
-```{r, echo = FALSE, eval = TRUE}
-DiagrammeR::mermaid("
-graph LR
-
-OOP --> encapsulated_OOP
-OOP --> functional_OOP
-
-functional_OOP --> S3
-functional_OOP --> S4
-
-encapsulated_OOP --> R6
-encapsulated_OOP --> RC
-")
-```
-
-<details>
-<summary>Mermaid code</summary>
-```{r, echo = TRUE, eval = FALSE}
-DiagrammeR::mermaid("
-graph LR
-
-OOP --> encapsulated_OOP
-OOP --> functional_OOP
-
-functional_OOP --> S3
-functional_OOP --> S4
-
-encapsulated_OOP --> R6
-encapsulated_OOP --> RC
-")
-```
-</details>
-
-## OOP in base R
-
-- **S3**
- - Paradigm: functional OOP
- - Noteworthy: R's first OOP system
- - Use case: low-cost solution for common problems
- - Downsides: no guarantees
-- **S4**
- - Paradigm: functional OOP
- - Noteworthy: rewrite of S3, used by `Bioconductor`
- - Use case: "more guarantees and greater encapsulation" than S3
- - Downsides: higher setup cost than S3
-- **RC**
- - Paradigm: encapsulated OOP
- - Noteworthy: special type of S4 object is mutable--in other words, that can be modified in place (instead of R's usual copy-on-modify behavior)
- - Use cases: problems that are hard to tackle with functional OOP (in S3 and S4)
- - Downsides: harder to reason about (because of modify-in-place logic)
-
-## OOP in packages
-
-- **R6**
- - Paradigm: encapsulated OOP
- - Noteworthy: resolves issues with RC
-- **R7**
- - Paradigm: functional OOP
- - Noteworthy:
- - best parts of S3 and S4
- - ease of S3
- - power of S4
- - See more in [rstudio::conf(2022) talk](https://www.rstudio.com/conference/2022/talks/introduction-to-r7/)
-- **R.oo**
- - Paradigm: hybrid functional and encapsulated (?)
-- **proto**
- - Paradigm: prototype OOP
- - Noteworthy: OOP style used in `ggplot2`
-
-## How can you tell if an object is base or OOP?
-
-### Functions
-
-Two functions:
-
-- `base::is.object()`, which yields TRUE/FALSE about whether is OOP object
-- `sloop::otype()`, which says what type of object type: `"base"`, `"S3"`, etc.
-
-An few examples:
-
-```{r}
-# Example 1: a base object
-is.object(1:10)
-sloop::otype(1:10)
-
-# Example 2: an OO object
-is.object(mtcars)
-sloop::otype(mtcars)
-```
-
-### sloop
-
-* **S** **L**anguage **O**bject-**O**riented **P**rogramming
-
-[](https://en.wikipedia.org/wiki/Sloop_John_B)
-
-### Class
-
-OO objects have a "class" attribute:
-
-```{r}
-# base object has no class
-attr(1:10, "class")
-
-# OO object has one or more classes
-attr(mtcars, "class")
-```
-
-## What about types?
-
-Only OO objects have a "class" attribute, but every object--whether base or OO--has class
-
-### Vectors
-
-```{r}
-typeof(NULL)
-typeof(c("a", "b", "c"))
-typeof(1L)
-typeof(1i)
-```
-
-
-### Functions
-
-```{r}
-# "normal" function
-my_fun <- function(x) { x + 1 }
-typeof(my_fun)
-# internal function
-typeof(`[`)
-# primitive function
-typeof(sum)
-```
-
-### Environments
-
-```{r}
-typeof(globalenv())
-```
-
-
-### S4
-
-```{r}
-mle_obj <- stats4::mle(function(x = 1) (x - 2) ^ 2)
-typeof(mle_obj)
-```
-
-
-### Language components
-
-```{r}
-typeof(quote(a))
-typeof(quote(a + 1))
-typeof(formals(my_fun))
-```
-
-### Concept Map
-
-
-
-<details>
-<summary>Sankey graph code</summary>
-
-The graph above was made with [SankeyMATIC](https://sankeymatic.com/)
-
-```
-// toggle "Show Values"
-// set Default Flow Colors from "each flow's Source"
-
-base\ntypes [8] vectors
-base\ntypes [3] functions
-base\ntypes [1] environments
-base\ntypes [1] S4 OOP
-base\ntypes [3] language\ncomponents
-base\ntypes [6] C components
-
-vectors [1] NULL
-vectors [1] logical
-vectors [1] integer
-vectors [1] double
-vectors [1] complex
-vectors [1] character
-vectors [1] list
-vectors [1] raw
-
-functions [1] closure
-functions [1] special
-functions [1] builtin
-
-environments [1] environment
-
-S4 OOP [1] S4
-
-language\ncomponents [1] symbol
-language\ncomponents [1] language
-language\ncomponents [1] pairlist
-
-C components [1] externalptr
-C components [1] weakref
-C components [1] bytecode
-C components [1] promise
-C components [1] ...
-C components [1] any
-```
-
-</details>
-
-## Be careful about the numeric type
-
-1. Often "numeric" is treated as synonymous for double:
-
-```{r}
-# create a double and integeger objects
-one <- 1
-oneL <- 1L
-typeof(one)
-typeof(oneL)
-
-# check their type after as.numeric()
-one |> as.numeric() |> typeof()
-oneL |> as.numeric() |> typeof()
-```
-
-2. In S3 and S4, "numeric" is taken as either integer or double, when choosing methods:
-
-```{r}
-sloop::s3_class(1)
-sloop::s3_class(1L)
-```
-
-3. `is.numeric()` tests whether an object behaves like a number
-
-```{r}
-typeof(factor("x"))
-is.numeric(factor("x"))
-```
-
-But Advanced R consistently uses numeric to mean integer or double type.
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/Fy3JF5Em6qY")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/9GkgNC15EAw")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/IL6iJhAsZAY")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/4la5adcWwKE")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/NeHtEGab1Og")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/rfidR7tI_nQ")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:35:02 Trevin: sloop (“sail the seas of OOP”)
-00:42:40 Ryan Metcalf: Awesome input Trevin! I jumped to the vignette, but didn't see the reference directly.
-01:00:01 Trevin: If you're interested there may be a new “R Packages" cohort starting up soon (also a new version of the book coming out soonish as well?)
-01:08:23 Oluwafemi Oyedele: Thank you !!!
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/mOpmvc9h_4M")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:35:43 Stone: base::InternalMethods
-00:48:04 collinberke: https://cran.r-project.org/doc/manuals/R-exts.html
-```
-</details>
diff --git a/slides/13.Rmd b/slides/13.Rmd
@@ -0,0 +1,420 @@
+---
+engine: knitr
+title: S3
+---
+
+# Introduction
+
+## Basics
+
+- Has class
+- Uses a generic function to decide on method
+ - method = implementation for a specific class
+ - dispatch = process of searching for right method
+
+## Classes
+
+**Theory:**
+
+What is class?
+
+ - No formal definition in S3
+ - Simply set class attribute
+
+How to set class?
+
+ - At time of object creation
+ - After object creation
+
+```{r}
+# at time of object creation
+x <- structure(list(), class = "my_class")
+
+# after object creation
+x <- list()
+class(x) <- "my_class"
+```
+
+Some advice on style:
+
+ - Rules: Can be any string
+ - Advice: Consider using/including package name to avoid collision with name of another class (e.g., `blob`, which defines a single class; haven has `labelled` and `haven_labelled`)
+ - Convention: letters and `_`; avoid `.` since it might be confused as separator between generic and class name
+
+**Practice:**
+
+How to compose a class in practice?
+
+- **Constructor**, which helps the developer create new object of target class. Provide always.
+- **Validator**, which checks that values in constructor are valid. May not be necessary for simple classes.
+- **Helper**, which helps users create new objects of target class. May be relevant only for user-facing classes.
+
+### Constructors
+
+Help developers construct an object of the target class:
+
+```{r}
+new_difftime <- function(x = double(), units = "secs") {
+ # check inputs
+ # issue generic system error if unexpected type or value
+ stopifnot(is.double(x))
+ units <- match.arg(units, c("secs", "mins", "hours", "days", "weeks"))
+
+ # construct instance of target class
+ structure(x,
+ class = "difftime",
+ units = units
+ )
+}
+```
+
+### Validators
+
+Contrast a constructor, aimed at quickly creating instances of a class, which only checks type of inputs ...
+
+```{r, error = TRUE}
+new_factor <- function(x = integer(), levels = character()) {
+ stopifnot(is.integer(x))
+ stopifnot(is.character(levels))
+
+ structure(
+ x,
+ levels = levels,
+ class = "factor"
+ )
+}
+
+# error messages are for system default and developer-facing
+new_factor(1:5, "a")
+```
+
+
+... with a validator, aimed at emitting errors if inputs pose problems, which makes more expensive checks
+
+```{r, error = TRUE}
+validate_factor <- function(x) {
+ values <- unclass(x)
+ levels <- attr(x, "levels")
+
+ if (!all(!is.na(values) & values > 0)) {
+ stop(
+ "All `x` values must be non-missing and greater than zero",
+ call. = FALSE
+ )
+ }
+
+ if (length(levels) < max(values)) {
+ stop(
+ "There must be at least as many `levels` as possible values in `x`",
+ call. = FALSE
+ )
+ }
+
+ x
+}
+
+# error messages are informative and user-facing
+validate_factor(new_factor(1:5, "a"))
+```
+
+Maybe there is a typo in the `validate_factor()` function? Do the integers need to start at 1 and be consecutive?
+
+* If not, then `length(levels) < max(values)` should be `length(levels) < length(values)`, right?
+* If so, why do the integers need to start at 1 and be consecutive? And if they need to be as such, we should tell the user, right?
+
+```{r, error = TRUE}
+validate_factor(new_factor(1:3, levels = c("a", "b", "c")))
+validate_factor(new_factor(10:12, levels = c("a", "b", "c")))
+```
+
+
+### Helpers
+
+Some desired virtues:
+
+- Have the same name as the class
+- Call the constructor and validator, if the latter exists.
+- Issue error informative, user-facing error messages
+- Adopt thoughtful/useful defaults or type conversion
+
+
+Exercise 5 in 13.3.4
+
+Q: Read the documentation for `utils::as.roman()`. How would you write a constructor for this class? Does it need a validator? What might a helper do?
+
+A: This function transforms numeric input into Roman numbers. It is built on the integer type, which results in the following constructor.
+
+
+```{r}
+new_roman <- function(x = integer()) {
+ stopifnot(is.integer(x))
+ structure(x, class = "roman")
+}
+```
+
+The documentation tells us, that only values between 1 and 3899 are uniquely represented, which we then include in our validation function.
+
+```{r}
+validate_roman <- function(x) {
+ values <- unclass(x)
+
+ if (any(values < 1 | values > 3899)) {
+ stop(
+ "Roman numbers must fall between 1 and 3899.",
+ call. = FALSE
+ )
+ }
+ x
+}
+```
+
+For convenience, we allow the user to also pass real values to a helper function.
+
+```{r, error = TRUE}
+roman <- function(x = integer()) {
+ x <- as.integer(x)
+
+ validate_roman(new_roman(x))
+}
+
+# Test
+roman(c(1, 753, 2024))
+
+roman(0)
+```
+
+
+
+## Generics and methods
+
+**Generic functions:**
+
+- Consist of a call to `UseMethod()`
+- Pass arguments from the generic to the dispatched method "auto-magically"
+
+```{r}
+my_new_generic <- function(x) {
+ UseMethod("my_new_generic")
+}
+```
+
+### Method dispatch
+
+- `UseMethod()` creates a vector of method names
+- Dispatch
+ - Examines all methods in the vector
+ - Selects a method
+
+```{r}
+x <- Sys.Date()
+sloop::s3_dispatch(print(x))
+```
+
+### Finding methods
+
+While `sloop::s3_dispatch()` gives the specific method selected for a specific call, on can see the methods defined:
+
+- For a generic
+```{r}
+sloop::s3_methods_generic("mean")
+```
+- For a class
+```{r}
+sloop::s3_methods_class("ordered")
+```
+
+### Creating methods
+
+Two rules:
+
+- Only write a method if you own the generic. Otherwise, bad manners.
+- Method must have same arguments as its generic--with one important exception: `...`
+
+**Example from text:**
+
+I thought it would be good for us to work through this problem.
+
+> Carefully read the documentation for `UseMethod()` and explain why the following code returns the results that it does. What two usual rules of function evaluation does `UseMethod()` violate?
+
+```{r}
+g <- function(x) {
+ x <- 10
+ y <- 10
+ UseMethod("g")
+}
+g.default <- function(x) c(x = x, y = y)
+
+x <- 1
+y <- 1
+g(x)
+g.default(x)
+```
+
+
+
+**Examples caught in the wild:**
+
+- [`haven::zap_label`](https://github.com/tidyverse/haven/blob/main/R/zap_label.R), which removes column labels
+- [`dplyr::mutate`](https://github.com/tidyverse/dplyr/blob/main/R/mutate.R)
+- [`tidyr::pivot_longer`](https://github.com/tidyverse/tidyr/blob/main/R/pivot-long.R)
+
+## Object styles
+
+## Inheritance
+
+Three ideas:
+
+1. Class is a vector of classes
+```{r}
+class(ordered("x"))
+class(Sys.time())
+```
+2. Dispatch moves through class vector until it finds a defined method
+```{r}
+sloop::s3_dispatch(print(ordered("x")))
+```
+3. Method can delegate to another method via `NextMethod()`, which is indicated by `->` as below:
+```{r}
+sloop::s3_dispatch(ordered("x")[1])
+```
+
+### `NextMethod()`
+
+Consider `secret` class that masks each character of the input with `x` in output
+
+```{r}
+new_secret <- function(x = double()) {
+ stopifnot(is.double(x))
+ structure(x, class = "secret")
+}
+
+print.secret <- function(x, ...) {
+ print(strrep("x", nchar(x)))
+ invisible(x)
+}
+
+y <- new_secret(c(15, 1, 456))
+y
+```
+
+Notice that the `[` method is problematic in that it does not preserve the `secret` class. Additionally, it returns `15` as the first element instead of `xx`.
+
+```{r}
+sloop::s3_dispatch(y[1])
+y[1]
+```
+
+Fix this with a `[.secret` method:
+
+The first fix (not run) is inefficient because it creates a copy of `y`.
+
+```{r eval = FALSE}
+# not run
+`[.secret` <- function(x, i) {
+ x <- unclass(x)
+ new_secret(x[i])
+}
+```
+
+`NextMethod()` is more efficient.
+
+```{r}
+`[.secret` <- function(x, i) {
+ # first, dispatch to `[`
+ # then, coerce subset value to `secret` class
+ new_secret(NextMethod())
+}
+```
+
+Notice that `[.secret` is selected for dispatch, but that the method delegates to the internal `[`.
+
+```{r}
+sloop::s3_dispatch(y[1])
+y[1]
+```
+
+
+### Allowing subclassing
+
+Continue the example above to have a `supersecret` subclass that hides even the number of characters in the input (e.g., `123` -> `xxxxx`, 12345678 -> `xxxxx`, 1 -> `xxxxx`).
+
+To allow for this subclass, the constructor function needs to include two additional arguments:
+
+- `...` for passing an arbitrary set of arguments to different subclasses
+- `class` for defining the subclass
+
+```{r}
+new_secret <- function(x, ..., class = character()) {
+ stopifnot(is.double(x))
+
+ structure(
+ x,
+ ...,
+ class = c(class, "secret")
+ )
+}
+```
+
+To create the subclass, simply invoke the parent class constructor inside of the subclass constructor:
+
+```{r}
+new_supersecret <- function(x) {
+ new_secret(x, class = "supersecret")
+}
+
+print.supersecret <- function(x, ...) {
+ print(rep("xxxxx", length(x)))
+ invisible(x)
+}
+```
+
+But this means the subclass inherits all parent methods and needs to overwrite all parent methods with subclass methods that return the sublclass rather than the parent class.
+
+There's no easy solution to this problem in base R.
+
+There is a solution in the vectors package: `vctrs::vec_restore()`
+
+<!-- TODO: read docs/vignettes to be able to summarize how this works -->
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/Fy3JF5Em6qY")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/9GkgNC15EAw")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/q7lFXSLdC1g")`
+
+`r knitr::include_url("https://www.youtube.com/embed/2rHS_urTGFg")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/4la5adcWwKE")`
+
+`r knitr::include_url("https://www.youtube.com/embed/eTCT2O58GYM")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/NeHtEGab1Og")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/vzbl2o-MEeQ")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:05:30 Oluwafemi Oyedele: Hi everyone, Good Evening !!!
+00:09:44 Trevin: I agree Arthur, need to look at that package some more
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/zNLx4q8TCKQ")`
diff --git a/slides/13_S3.Rmd b/slides/13_S3.Rmd
@@ -1,417 +0,0 @@
-# S3
-
-## Introcudion
-
-## Basics
-
-- Has class
-- Uses a generic function to decide on method
- - method = implementation for a specific class
- - dispatch = process of searching for right method
-
-## Classes
-
-**Theory:**
-
-What is class?
-
- - No formal definition in S3
- - Simply set class attribute
-
-How to set class?
-
- - At time of object creation
- - After object creation
-
-```{r}
-# at time of object creation
-x <- structure(list(), class = "my_class")
-
-# after object creation
-x <- list()
-class(x) <- "my_class"
-```
-
-Some advice on style:
-
- - Rules: Can be any string
- - Advice: Consider using/including package name to avoid collision with name of another class (e.g., `blob`, which defines a single class; haven has `labelled` and `haven_labelled`)
- - Convention: letters and `_`; avoid `.` since it might be confused as separator between generic and class name
-
-**Practice:**
-
-How to compose a class in practice?
-
-- **Constructor**, which helps the developer create new object of target class. Provide always.
-- **Validator**, which checks that values in constructor are valid. May not be necessary for simple classes.
-- **Helper**, which helps users create new objects of target class. May be relevant only for user-facing classes.
-
-### Constructors
-
-Help developers construct an object of the target class:
-
-```{r}
-new_difftime <- function(x = double(), units = "secs") {
- # check inputs
- # issue generic system error if unexpected type or value
- stopifnot(is.double(x))
- units <- match.arg(units, c("secs", "mins", "hours", "days", "weeks"))
-
- # construct instance of target class
- structure(x,
- class = "difftime",
- units = units
- )
-}
-```
-
-### Validators
-
-Contrast a constructor, aimed at quickly creating instances of a class, which only checks type of inputs ...
-
-```{r, error = TRUE}
-new_factor <- function(x = integer(), levels = character()) {
- stopifnot(is.integer(x))
- stopifnot(is.character(levels))
-
- structure(
- x,
- levels = levels,
- class = "factor"
- )
-}
-
-# error messages are for system default and developer-facing
-new_factor(1:5, "a")
-```
-
-
-... with a validator, aimed at emitting errors if inputs pose problems, which makes more expensive checks
-
-```{r, error = TRUE}
-validate_factor <- function(x) {
- values <- unclass(x)
- levels <- attr(x, "levels")
-
- if (!all(!is.na(values) & values > 0)) {
- stop(
- "All `x` values must be non-missing and greater than zero",
- call. = FALSE
- )
- }
-
- if (length(levels) < max(values)) {
- stop(
- "There must be at least as many `levels` as possible values in `x`",
- call. = FALSE
- )
- }
-
- x
-}
-
-# error messages are informative and user-facing
-validate_factor(new_factor(1:5, "a"))
-```
-
-Maybe there is a typo in the `validate_factor()` function? Do the integers need to start at 1 and be consecutive?
-
-* If not, then `length(levels) < max(values)` should be `length(levels) < length(values)`, right?
-* If so, why do the integers need to start at 1 and be consecutive? And if they need to be as such, we should tell the user, right?
-
-```{r, error = TRUE}
-validate_factor(new_factor(1:3, levels = c("a", "b", "c")))
-validate_factor(new_factor(10:12, levels = c("a", "b", "c")))
-```
-
-
-### Helpers
-
-Some desired virtues:
-
-- Have the same name as the class
-- Call the constructor and validator, if the latter exists.
-- Issue error informative, user-facing error messages
-- Adopt thoughtful/useful defaults or type conversion
-
-
-Exercise 5 in 13.3.4
-
-Q: Read the documentation for `utils::as.roman()`. How would you write a constructor for this class? Does it need a validator? What might a helper do?
-
-A: This function transforms numeric input into Roman numbers. It is built on the integer type, which results in the following constructor.
-
-
-```{r}
-new_roman <- function(x = integer()) {
- stopifnot(is.integer(x))
- structure(x, class = "roman")
-}
-```
-
-The documentation tells us, that only values between 1 and 3899 are uniquely represented, which we then include in our validation function.
-
-```{r}
-validate_roman <- function(x) {
- values <- unclass(x)
-
- if (any(values < 1 | values > 3899)) {
- stop(
- "Roman numbers must fall between 1 and 3899.",
- call. = FALSE
- )
- }
- x
-}
-```
-
-For convenience, we allow the user to also pass real values to a helper function.
-
-```{r, error = TRUE}
-roman <- function(x = integer()) {
- x <- as.integer(x)
-
- validate_roman(new_roman(x))
-}
-
-# Test
-roman(c(1, 753, 2024))
-
-roman(0)
-```
-
-
-
-## Generics and methods
-
-**Generic functions:**
-
-- Consist of a call to `UseMethod()`
-- Pass arguments from the generic to the dispatched method "auto-magically"
-
-```{r}
-my_new_generic <- function(x) {
- UseMethod("my_new_generic")
-}
-```
-
-### Method dispatch
-
-- `UseMethod()` creates a vector of method names
-- Dispatch
- - Examines all methods in the vector
- - Selects a method
-
-```{r}
-x <- Sys.Date()
-sloop::s3_dispatch(print(x))
-```
-
-### Finding methods
-
-While `sloop::s3_dispatch()` gives the specific method selected for a specific call, on can see the methods defined:
-
-- For a generic
-```{r}
-sloop::s3_methods_generic("mean")
-```
-- For a class
-```{r}
-sloop::s3_methods_class("ordered")
-```
-
-### Creating methods
-
-Two rules:
-
-- Only write a method if you own the generic. Otherwise, bad manners.
-- Method must have same arguments as its generic--with one important exception: `...`
-
-**Example from text:**
-
-I thought it would be good for us to work through this problem.
-
-> Carefully read the documentation for `UseMethod()` and explain why the following code returns the results that it does. What two usual rules of function evaluation does `UseMethod()` violate?
-
-```{r}
-g <- function(x) {
- x <- 10
- y <- 10
- UseMethod("g")
-}
-g.default <- function(x) c(x = x, y = y)
-
-x <- 1
-y <- 1
-g(x)
-g.default(x)
-```
-
-
-
-**Examples caught in the wild:**
-
-- [`haven::zap_label`](https://github.com/tidyverse/haven/blob/main/R/zap_label.R), which removes column labels
-- [`dplyr::mutate`](https://github.com/tidyverse/dplyr/blob/main/R/mutate.R)
-- [`tidyr::pivot_longer`](https://github.com/tidyverse/tidyr/blob/main/R/pivot-long.R)
-
-## Object styles
-
-## Inheritance
-
-Three ideas:
-
-1. Class is a vector of classes
-```{r}
-class(ordered("x"))
-class(Sys.time())
-```
-2. Dispatch moves through class vector until it finds a defined method
-```{r}
-sloop::s3_dispatch(print(ordered("x")))
-```
-3. Method can delegate to another method via `NextMethod()`, which is indicated by `->` as below:
-```{r}
-sloop::s3_dispatch(ordered("x")[1])
-```
-
-### `NextMethod()`
-
-Consider `secret` class that masks each character of the input with `x` in output
-
-```{r}
-new_secret <- function(x = double()) {
- stopifnot(is.double(x))
- structure(x, class = "secret")
-}
-
-print.secret <- function(x, ...) {
- print(strrep("x", nchar(x)))
- invisible(x)
-}
-
-y <- new_secret(c(15, 1, 456))
-y
-```
-
-Notice that the `[` method is problematic in that it does not preserve the `secret` class. Additionally, it returns `15` as the first element instead of `xx`.
-
-```{r}
-sloop::s3_dispatch(y[1])
-y[1]
-```
-
-Fix this with a `[.secret` method:
-
-The first fix (not run) is inefficient because it creates a copy of `y`.
-
-```{r eval = FALSE}
-# not run
-`[.secret` <- function(x, i) {
- x <- unclass(x)
- new_secret(x[i])
-}
-```
-
-`NextMethod()` is more efficient.
-
-```{r}
-`[.secret` <- function(x, i) {
- # first, dispatch to `[`
- # then, coerce subset value to `secret` class
- new_secret(NextMethod())
-}
-```
-
-Notice that `[.secret` is selected for dispatch, but that the method delegates to the internal `[`.
-
-```{r}
-sloop::s3_dispatch(y[1])
-y[1]
-```
-
-
-### Allowing subclassing
-
-Continue the example above to have a `supersecret` subclass that hides even the number of characters in the input (e.g., `123` -> `xxxxx`, 12345678 -> `xxxxx`, 1 -> `xxxxx`).
-
-To allow for this subclass, the constructor function needs to include two additional arguments:
-
-- `...` for passing an arbitrary set of arguments to different subclasses
-- `class` for defining the subclass
-
-```{r}
-new_secret <- function(x, ..., class = character()) {
- stopifnot(is.double(x))
-
- structure(
- x,
- ...,
- class = c(class, "secret")
- )
-}
-```
-
-To create the subclass, simply invoke the parent class constructor inside of the subclass constructor:
-
-```{r}
-new_supersecret <- function(x) {
- new_secret(x, class = "supersecret")
-}
-
-print.supersecret <- function(x, ...) {
- print(rep("xxxxx", length(x)))
- invisible(x)
-}
-```
-
-But this means the subclass inherits all parent methods and needs to overwrite all parent methods with subclass methods that return the sublclass rather than the parent class.
-
-There's no easy solution to this problem in base R.
-
-There is a solution in the vectors package: `vctrs::vec_restore()`
-
-<!-- TODO: read docs/vignettes to be able to summarize how this works -->
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/Fy3JF5Em6qY")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/9GkgNC15EAw")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/q7lFXSLdC1g")`
-
-`r knitr::include_url("https://www.youtube.com/embed/2rHS_urTGFg")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/4la5adcWwKE")`
-
-`r knitr::include_url("https://www.youtube.com/embed/eTCT2O58GYM")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/NeHtEGab1Og")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/vzbl2o-MEeQ")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:05:30 Oluwafemi Oyedele: Hi everyone, Good Evening !!!
-00:09:44 Trevin: I agree Arthur, need to look at that package some more
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/zNLx4q8TCKQ")`
diff --git a/slides/14.Rmd b/slides/14.Rmd
@@ -0,0 +1,555 @@
+---
+engine: knitr
+title: R6
+---
+
+## Learning objectives:
+
+```{r include=FALSE}
+library(ids)
+```
+
+- Discuss how to construct a R6 class.
+- Overview the different mechanisms of a R6 class (e.g. initialization, print, public, private, and active fields and methods).
+- Observe various examples using R6's mechanisms to create R6 classes, objects, fields, and methods.
+- Observe the consequences of R6's reference semantics.
+- Review the book's arguments on the use of R6 over reference classes.
+
+## A review of OOP
+
+
+
+* **A PIE**
+
+## Introducing R6
+
+
+
+* R6 classes are not built into base.
+ * It is a separate [package](https://r6.r-lib.org/).
+ * You have to install and attach to use.
+ * If R6 objects are used in a package, it needs to be specified as a dependency in the `DESCRIPTION` file.
+
+```{r eval=FALSE}
+install.packages("R6")
+```
+
+```{r}
+library(R6)
+```
+
+* R6 classes have two special properties:
+ 1. Uses an encapsulated OOP paradigm.
+ * Methods belong to objects, not generics.
+ * They follow the form `object$method()` for calling fields and methods.
+ 2. R6 objects are mutable.
+ * Modified in place.
+ * They follow reference semantics.
+* R6 is similar to OOP in other languages.
+* However, its use can lead ton non-idiomatic R code.
+ * Tradeoffs - follows an OOP paradigm but sacrafice what users are use to.
+ * [Microsoft365R](https://github.com/Azure/Microsoft365R).
+
+## Constructing an R6 class, the basics
+
+* Really simple to do, just use the `R6::R6Class()` function.
+
+```{r}
+Accumulator <- R6Class("Accumulator", list(
+ sum = 0,
+ add = function(x = 1) {
+ self$sum <- self$sum + x
+ invisible(self)
+ }
+))
+```
+
+* Two important arguments:
+ 1. `classname` - A string used to name the class (not needed but suggested)
+ 2. `public` - A list of methods (functions) and fields (anything else)
+* Suggested style conventions to follow:
+ * Class name should follow `UpperCamelCase`.
+ * Methods and fields should use `snake_case`.
+ * Always assign the result of a `R6Class()` into a variable with the same name as the class.
+* You can use `self$` to access methods and fields of the current object.
+
+## Constructing an R6 object
+
+* Just use `$new()`
+
+```{r}
+x <- Accumulator$new()
+```
+
+```{r}
+x$add(4)
+x$sum
+```
+
+## R6 objects and method chaining
+
+* All side-effect R6 methods should return `self` invisibly.
+* This allows for method chaining.
+
+```{r eval=FALSE}
+x$add(10)$add(10)$sum
+# [1] 24
+```
+
+* To improve readability:
+
+```{r eval=FALSE}
+# Method chaining
+x$
+ add(10)$
+ add(10)$
+ sum
+# [1] 44
+```
+
+## R6 useful methods
+
+* `$print()` - Modifies the default printing method.
+ * `$print()` should always return `invisible(self)`.
+* `$initialize()` - Overides the default behaviour of `$new()`.
+ * Also provides a space to validate inputs.
+
+## Constructing a bank account class
+
+```{r}
+BankAccount <- R6Class("BankAccount", list(
+ owner = NULL,
+ type = NULL,
+ balance = 0,
+ initialize = function(owner, type) {
+ stopifnot(is.character(owner), length(owner) == 1)
+ stopifnot(is.character(type), length(type) == 1)
+ },
+ deposit = function(amount) {
+ self$balance <- self$balance + amount
+ invisible(self)
+ },
+ withdraw = function(amount) {
+ self$balance <- self$balance - amount
+ invisible(self)
+ }
+))
+```
+
+## Simple transactions
+
+```{r}
+collinsavings <- BankAccount$new("Collin", type = "Savings")
+collinsavings$deposit(10)
+collinsavings
+```
+
+```{r}
+collinsavings$withdraw(10)
+collinsavings
+```
+
+## Modifying the `$print()` method
+
+```{r}
+BankAccount <- R6Class("BankAccount", list(
+ owner = NULL,
+ type = NULL,
+ balance = 0,
+ initialize = function(owner, type) {
+ stopifnot(is.character(owner), length(owner) == 1)
+ stopifnot(is.character(type), length(type) == 1)
+
+ self$owner <- owner
+ self$type <- type
+ },
+ deposit = function(amount) {
+ self$balance <- self$balance + amount
+ invisible(self)
+ },
+ withdraw = function(amount) {
+ self$balance <- self$balance - amount
+ invisible(self)
+ },
+ print = function(...) {
+ cat("Account owner: ", self$owner, "\n", sep = "")
+ cat("Account type: ", self$type, "\n", sep = "")
+ cat(" Balance: ", self$balance, "\n", sep = "")
+ invisible(self)
+ }
+))
+```
+
+* Important point: Methods are bound to individual objects.
+ * Reference semantics vs. copy-on-modify.
+
+```{r eval=FALSE}
+collinsavings
+
+hadleychecking <- BankAccount$new("Hadley", type = "Checking")
+
+hadleychecking
+```
+
+## How does this work?
+
+* [Winston Chang's 2017 useR talk](https://www.youtube.com/watch?v=3GEFd8rZQgY&list=WL&index=11)
+
+* [R6 objects are just environments with a particular structure.](https://youtu.be/3GEFd8rZQgY?t=759)
+
+
+
+## Adding methods after class creation
+
+* Use `$set()` to add methods after creation.
+* Keep in mind methods added with `$set()` are only available with new objects.
+
+```{r eval=FALSE}
+Accumulator <- R6Class("Accumulator")
+Accumlator$set("public", "sum", 0)
+Accumulator$set("public", "add", function(x = 1) {
+ self$sum <- self$sum + x
+ invisible(self)
+})
+```
+
+## Inheritance
+
+* To inherit behaviour from an existing class, provide the class object via the `inherit` argument.
+* This example also provides a good example on how to [debug]() an R6 class.
+
+```{r eval=FALSE}
+BankAccountOverDraft <- R6Class("BankAccountOverDraft",
+ inherit = BankAccount,
+ public = list(
+ withdraw = function(amount) {
+ if ((self$balance - amount) < 0) {
+ stop("Overdraft")
+ }
+ # self$balance() <- self$withdraw()
+ self$balance <- self$balance - amount
+ invisible(self)
+ }
+ )
+)
+```
+
+### Future instances debugging
+
+```{r eval=FALSE}
+BankAccountOverDraft$debug("withdraw")
+x <- BankAccountOverDraft$new("x", type = "Savings")
+x$withdraw(20)
+
+# Turn debugging off
+BankAccountOverDraft$undebug("withdraw")
+```
+
+### Individual object debugging
+
+* Use the `debug()` function.
+
+```{r eval=FALSE}
+x <- BankAccountOverDraft$new("x", type = "Savings")
+# Turn on debugging
+debug(x$withdraw)
+x$withdraw(10)
+
+# Turn off debugging
+undebug(x$withdraw)
+x$withdraw(5)
+```
+
+### Test out our debugged class
+
+```{r eval=FALSE}
+collinsavings <- BankAccountOverDraft$new("Collin", type = "Savings")
+collinsavings
+collinsavings$withdraw(10)
+collinsavings
+collinsavings$deposit(5)
+collinsavings
+collinsavings$withdraw(5)
+```
+
+## Introspection
+
+* Every R6 object has an S3 class that reflects its hierarchy of R6 classes.
+* Use the `class()` function to determine class (and all classes it inherits from).
+
+```{r eval=FALSE}
+class(collinsavings)
+```
+
+* You can also list all methods and fields of an R6 object with `names()`.
+
+```{r eval=FALSE}
+names(collinsavings)
+```
+
+## Controlling access
+
+* R6 provides two other arguments:
+ * `private` - create fields and methods only available from within the class.
+ * `active` - allows you to use accessor functions to define dynamic or active fields.
+
+## Privacy
+
+* Private fields and methods - elements that can only be accessed from within the class, not from the outside.
+* We need to know two things to use private elements:
+ 1. `private`'s interface is just like `public`'s interface.
+ * List of methods (functions) and fields (everything else).
+ 2. You use `private$` instead of `self$`
+ * You cannot access private fields or methods outside of the class.
+* Why might you want to keep your methods and fields private?
+ * You'll want to be clear what is ok for others to access, especially if you have a complex system of classes.
+ * It's easier to refactor private fields and methods, as you know others are not relying on it.
+
+## Active fields
+
+* Active fields allow you to define components that look like fields from the outside, but are defined with functions, like methods.
+* Implemented using active bindings.
+* Each active binding is a function that takes a single argument `value`.
+* Great when used in conjunction with private fields.
+ * This allows for additional checks.
+ * For example, we can use them to make a read-only field and to validate inputs.
+
+## Adding a read-only bank account number
+
+```{r eval=FALSE}
+BankAccount <- R6Class("BankAccount", public = list(
+ owner = NULL,
+ type = NULL,
+ balance = 0,
+ initialize = function(owner, type, acct_num = NULL) {
+ private$acct_num <- acct_num
+ self$owner <- owner
+ self$type <- type
+ },
+ deposit = function(amount) {
+ self$balance <- self$balance + amount
+ invisible(self)
+ },
+ withdraw = function(amount) {
+ self$balance <- self$balance - amount
+ invisible(self)
+ },
+ print = function(...) {
+ cat("Account owner: ", self$owner, "\n", sep = "")
+ cat("Account type: ", self$type, "\n", sep = "")
+ cat("Account #: ", private$acct_num, "\n", sep = "")
+ cat(" Balance: ", self$balance, "\n", sep = "")
+ invisible(self)
+ }
+ ),
+ private = list(
+ acct_num = NULL
+ ),
+ active = list(
+ create_acct_num = function(value) {
+ if (is.null(private$acct_num)) {
+ private$acct_num <- ids::uuid()
+ } else {
+ stop("`$acct_num` already assigned")
+ }
+ }
+ )
+)
+```
+
+```{r eval=FALSE}
+collinsavings <- BankAccount$new("Collin", type = "Savings")
+collinsavings$create_acct_num
+# Stops because account number is assigned
+collinsavings$create_acct_num()
+collinsavings$print()
+```
+
+## How does an active field work?
+
+* Not sold on this, as I don't know if `active` gets its own environment.
+ * Any ideas?
+
+
+
+## Reference semantics
+
+* Big difference to note about R6 objects in relation to other objects:
+ * R6 objects have reference semantics.
+* The primary consequence of reference semantics is that objects are not copied when modified.
+* If you want to copy an R6 object, you need to use `$clone`.
+* There are some other less obvious consequences:
+ * It's harder to reason about code that uses R6 objects, as you need more context.
+ * Think about when an R6 object is deleted, you can use `$finalize()` to clean up after yourself.
+ * If one of the fields is an R6 object, you must create it inside `$initialize()`, not `R6Class()`
+
+## R6 makes it harder to reason about code
+
+* Reference semantics makes code harder to reason about.
+
+```{r eval=FALSE}
+x <- list(a = 1)
+y <- list(b = 2)
+
+# Here we know the final line only modifies z
+z <- f(x, y)
+
+# vs.
+
+x <- List$new(a = 1)
+y <- List$new(b = 2)
+
+# If x or y is a method, we don't know if it modifies
+# something other than z. Is this a limitation of
+# abstraction?
+z <- f(x, y)
+```
+
+* I understand the basics, but not necessarily the tradeoffs.
+ * Anyone care to fill me in?
+ * Is this a limitation of abstraction?
+
+## Better sense of what's going on by looking at a finalizer
+
+* Since R6 objects are not copied-on-modified, so they are only deleted once.
+* We can use this characteristic to complement our `$initialize()` with a `$finalize()` method.
+ * i.e., to clean up after we delete an R6 object.
+ * This could be a way to close a database connection.
+
+```{r eval=FALSE}
+TemporaryFile <- R6Class("TemporaryFile", list(
+ path = NULL,
+ initialize = function() {
+ self$path <- tempfile()
+ },
+ finalize = function() {
+ message("Cleaning up ", self$path)
+ unlink(self$path)
+ }
+))
+```
+
+```{r eval=FALSE}
+tf <- TemporaryFile$new()
+# The finalizer will clean up, once the R6 object is deleted.
+rm(tf)
+```
+
+## Consequences of R6 fields
+
+* If you use an R6 class as the default value of a field, it will be shared across all instances of the object.
+
+```{r eval=FALSE}
+TemporaryDatabase <- R6Class("TemporaryDatabase", list(
+ con = NULL,
+ file = TemporaryFile$new(),
+ initialize = function() {
+ self$con <- DBI::dbConnect(RSQLite::SQLite(), path = file$path)
+ },
+ finalize = function() {
+ DBI::dbDisconnect(self$con)
+ }
+))
+
+db_a <- TemporaryDatabase$new()
+db_b <- TemporaryDatabase$new()
+
+db_a$file$path == db_b$file$path
+#> [1] TRUE
+```
+
+* To fix this, we need to move the class method call to `$intialize()`
+
+```{r eval=FALSE}
+TemporaryDatabase <- R6Class("TemporaryDatabase", list(
+ con = NULL,
+ file = NULL,
+ initialize = function() {
+ self$file <- TemporaryFile$new()
+ self$con <- DBI::dbConnect(RSQLite::SQLite(), path = file$path)
+ },
+ finalize = function() {
+ DBI::dbDisconnect(self$con)
+ }
+))
+
+db_a <- TemporaryDatabase$new()
+db_b <- TemporaryDatabase$new()
+
+db_a$file$path == db_b$file$path
+#> [1] FALSE
+```
+
+## Why use R6?
+
+* Book mentions R6 is similar to the built-in reference classes.
+* Then why use R6?
+* R6 is simpler.
+ * RC requires you to understand S4.
+* [Comprehensive documentation](https://r6.r-lib.org/articles/Introduction.html).
+* Simpler mechanisms for cross-package subclassing, which just works.
+* R6 separates public and private fields in separate environments, RC stacks everything in the same environment.
+* [R6 is faster](https://r6.r-lib.org/articles/Performance.html).
+* RC is tied to R, so any bug fixes need a newer version of R.
+ * This is especially important if you're writing packages that need to work with multiple R versions.
+* R6 and RC are similar, so if you need RC, it will only require a small amount of additional effort to learn RC.
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/hPjaOdprgow")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/LVkDJ28XJUE")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/rCjQTbQ22qc")`
+
+`r knitr::include_url("https://www.youtube.com/embed/ii6xhOzT_HQ")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/i_z6pHavhX0")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/NXmlqK2LxWw")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/EuTubeJ1VUw")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:11:34 Trevin: https://engineering-shiny.org/common-app-caveats.html?q=R6#using-r6-as-data-storage
+00:39:36 Federica Gazzelloni: new R7: https://rconsortium.github.io/OOP-WG/
+00:40:04 Federica Gazzelloni: R7 designed to be a successor to S3 and S4
+00:40:40 Federica Gazzelloni: R6: https://r6.r-lib.org/articles/Introduction.html
+00:52:44 Trevin: https://advanced-r-solutions.rbind.io/r6.html#controlling-access
+01:00:34 Federica Gazzelloni: interesting: https://r-craft.org/r-news/object-oriented-programming-oop-in-r-with-r6-the-complete-guide/
+01:01:58 Trevin: https://hadley.shinyapps.io/cran-downloads/
+01:02:33 Oluwafemi Oyedele: Thank you !!!
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/Q4FA0BB_PeY")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:06:57 Ron Legere: https://arxiv.org/abs/2303.12712
+00:07:07 Ron Legere: ^^ shows some of the power and limitations
+00:39:41 collinberke: https://www.youtube.com/watch?v=3GEFd8rZQgY&list=WL&index=11
+00:49:20 iPhone: Sorry fellas need to jump early. See you next week!
+01:05:21 collinberke: https://github.com/r4ds/bookclub-advr
+01:09:30 Ron Legere: makeActiveBinding
+```
+</details>
diff --git a/slides/14_R6.Rmd b/slides/14_R6.Rmd
@@ -1,552 +0,0 @@
-# R6
-
-```{r include=FALSE}
-library(ids)
-```
-
-**Learning objectives:**
-
-- Discuss how to construct a R6 class.
-- Overview the different mechanisms of a R6 class (e.g. initialization, print, public, private, and active fields and methods).
-- Observe various examples using R6's mechanisms to create R6 classes, objects, fields, and methods.
-- Observe the consequences of R6's reference semantics.
-- Review the book's arguments on the use of R6 over reference classes.
-
-## A review of OOP
-
-
-
-* **A PIE**
-
-## Introducing R6
-
-
-
-* R6 classes are not built into base.
- * It is a separate [package](https://r6.r-lib.org/).
- * You have to install and attach to use.
- * If R6 objects are used in a package, it needs to be specified as a dependency in the `DESCRIPTION` file.
-
-```{r eval=FALSE}
-install.packages("R6")
-```
-
-```{r}
-library(R6)
-```
-
-* R6 classes have two special properties:
- 1. Uses an encapsulated OOP paradigm.
- * Methods belong to objects, not generics.
- * They follow the form `object$method()` for calling fields and methods.
- 2. R6 objects are mutable.
- * Modified in place.
- * They follow reference semantics.
-* R6 is similar to OOP in other languages.
-* However, its use can lead ton non-idiomatic R code.
- * Tradeoffs - follows an OOP paradigm but sacrafice what users are use to.
- * [Microsoft365R](https://github.com/Azure/Microsoft365R).
-
-## Constructing an R6 class, the basics
-
-* Really simple to do, just use the `R6::R6Class()` function.
-
-```{r}
-Accumulator <- R6Class("Accumulator", list(
- sum = 0,
- add = function(x = 1) {
- self$sum <- self$sum + x
- invisible(self)
- }
-))
-```
-
-* Two important arguments:
- 1. `classname` - A string used to name the class (not needed but suggested)
- 2. `public` - A list of methods (functions) and fields (anything else)
-* Suggested style conventions to follow:
- * Class name should follow `UpperCamelCase`.
- * Methods and fields should use `snake_case`.
- * Always assign the result of a `R6Class()` into a variable with the same name as the class.
-* You can use `self$` to access methods and fields of the current object.
-
-## Constructing an R6 object
-
-* Just use `$new()`
-
-```{r}
-x <- Accumulator$new()
-```
-
-```{r}
-x$add(4)
-x$sum
-```
-
-## R6 objects and method chaining
-
-* All side-effect R6 methods should return `self` invisibly.
-* This allows for method chaining.
-
-```{r eval=FALSE}
-x$add(10)$add(10)$sum
-# [1] 24
-```
-
-* To improve readability:
-
-```{r eval=FALSE}
-# Method chaining
-x$
- add(10)$
- add(10)$
- sum
-# [1] 44
-```
-
-## R6 useful methods
-
-* `$print()` - Modifies the default printing method.
- * `$print()` should always return `invisible(self)`.
-* `$initialize()` - Overides the default behaviour of `$new()`.
- * Also provides a space to validate inputs.
-
-## Constructing a bank account class
-
-```{r}
-BankAccount <- R6Class("BankAccount", list(
- owner = NULL,
- type = NULL,
- balance = 0,
- initialize = function(owner, type) {
- stopifnot(is.character(owner), length(owner) == 1)
- stopifnot(is.character(type), length(type) == 1)
- },
- deposit = function(amount) {
- self$balance <- self$balance + amount
- invisible(self)
- },
- withdraw = function(amount) {
- self$balance <- self$balance - amount
- invisible(self)
- }
-))
-```
-
-## Simple transactions
-
-```{r}
-collinsavings <- BankAccount$new("Collin", type = "Savings")
-collinsavings$deposit(10)
-collinsavings
-```
-
-```{r}
-collinsavings$withdraw(10)
-collinsavings
-```
-
-## Modifying the `$print()` method
-
-```{r}
-BankAccount <- R6Class("BankAccount", list(
- owner = NULL,
- type = NULL,
- balance = 0,
- initialize = function(owner, type) {
- stopifnot(is.character(owner), length(owner) == 1)
- stopifnot(is.character(type), length(type) == 1)
-
- self$owner <- owner
- self$type <- type
- },
- deposit = function(amount) {
- self$balance <- self$balance + amount
- invisible(self)
- },
- withdraw = function(amount) {
- self$balance <- self$balance - amount
- invisible(self)
- },
- print = function(...) {
- cat("Account owner: ", self$owner, "\n", sep = "")
- cat("Account type: ", self$type, "\n", sep = "")
- cat(" Balance: ", self$balance, "\n", sep = "")
- invisible(self)
- }
-))
-```
-
-* Important point: Methods are bound to individual objects.
- * Reference semantics vs. copy-on-modify.
-
-```{r eval=FALSE}
-collinsavings
-
-hadleychecking <- BankAccount$new("Hadley", type = "Checking")
-
-hadleychecking
-```
-
-## How does this work?
-
-* [Winston Chang's 2017 useR talk](https://www.youtube.com/watch?v=3GEFd8rZQgY&list=WL&index=11)
-
-* [R6 objects are just environments with a particular structure.](https://youtu.be/3GEFd8rZQgY?t=759)
-
-
-
-## Adding methods after class creation
-
-* Use `$set()` to add methods after creation.
-* Keep in mind methods added with `$set()` are only available with new objects.
-
-```{r eval=FALSE}
-Accumulator <- R6Class("Accumulator")
-Accumlator$set("public", "sum", 0)
-Accumulator$set("public", "add", function(x = 1) {
- self$sum <- self$sum + x
- invisible(self)
-})
-```
-
-## Inheritance
-
-* To inherit behaviour from an existing class, provide the class object via the `inherit` argument.
-* This example also provides a good example on how to [debug]() an R6 class.
-
-```{r eval=FALSE}
-BankAccountOverDraft <- R6Class("BankAccountOverDraft",
- inherit = BankAccount,
- public = list(
- withdraw = function(amount) {
- if ((self$balance - amount) < 0) {
- stop("Overdraft")
- }
- # self$balance() <- self$withdraw()
- self$balance <- self$balance - amount
- invisible(self)
- }
- )
-)
-```
-
-### Future instances debugging
-
-```{r eval=FALSE}
-BankAccountOverDraft$debug("withdraw")
-x <- BankAccountOverDraft$new("x", type = "Savings")
-x$withdraw(20)
-
-# Turn debugging off
-BankAccountOverDraft$undebug("withdraw")
-```
-
-### Individual object debugging
-
-* Use the `debug()` function.
-
-```{r eval=FALSE}
-x <- BankAccountOverDraft$new("x", type = "Savings")
-# Turn on debugging
-debug(x$withdraw)
-x$withdraw(10)
-
-# Turn off debugging
-undebug(x$withdraw)
-x$withdraw(5)
-```
-
-### Test out our debugged class
-
-```{r eval=FALSE}
-collinsavings <- BankAccountOverDraft$new("Collin", type = "Savings")
-collinsavings
-collinsavings$withdraw(10)
-collinsavings
-collinsavings$deposit(5)
-collinsavings
-collinsavings$withdraw(5)
-```
-
-## Introspection
-
-* Every R6 object has an S3 class that reflects its hierarchy of R6 classes.
-* Use the `class()` function to determine class (and all classes it inherits from).
-
-```{r eval=FALSE}
-class(collinsavings)
-```
-
-* You can also list all methods and fields of an R6 object with `names()`.
-
-```{r eval=FALSE}
-names(collinsavings)
-```
-
-## Controlling access
-
-* R6 provides two other arguments:
- * `private` - create fields and methods only available from within the class.
- * `active` - allows you to use accessor functions to define dynamic or active fields.
-
-## Privacy
-
-* Private fields and methods - elements that can only be accessed from within the class, not from the outside.
-* We need to know two things to use private elements:
- 1. `private`'s interface is just like `public`'s interface.
- * List of methods (functions) and fields (everything else).
- 2. You use `private$` instead of `self$`
- * You cannot access private fields or methods outside of the class.
-* Why might you want to keep your methods and fields private?
- * You'll want to be clear what is ok for others to access, especially if you have a complex system of classes.
- * It's easier to refactor private fields and methods, as you know others are not relying on it.
-
-## Active fields
-
-* Active fields allow you to define components that look like fields from the outside, but are defined with functions, like methods.
-* Implemented using active bindings.
-* Each active binding is a function that takes a single argument `value`.
-* Great when used in conjunction with private fields.
- * This allows for additional checks.
- * For example, we can use them to make a read-only field and to validate inputs.
-
-## Adding a read-only bank account number
-
-```{r eval=FALSE}
-BankAccount <- R6Class("BankAccount", public = list(
- owner = NULL,
- type = NULL,
- balance = 0,
- initialize = function(owner, type, acct_num = NULL) {
- private$acct_num <- acct_num
- self$owner <- owner
- self$type <- type
- },
- deposit = function(amount) {
- self$balance <- self$balance + amount
- invisible(self)
- },
- withdraw = function(amount) {
- self$balance <- self$balance - amount
- invisible(self)
- },
- print = function(...) {
- cat("Account owner: ", self$owner, "\n", sep = "")
- cat("Account type: ", self$type, "\n", sep = "")
- cat("Account #: ", private$acct_num, "\n", sep = "")
- cat(" Balance: ", self$balance, "\n", sep = "")
- invisible(self)
- }
- ),
- private = list(
- acct_num = NULL
- ),
- active = list(
- create_acct_num = function(value) {
- if (is.null(private$acct_num)) {
- private$acct_num <- ids::uuid()
- } else {
- stop("`$acct_num` already assigned")
- }
- }
- )
-)
-```
-
-```{r eval=FALSE}
-collinsavings <- BankAccount$new("Collin", type = "Savings")
-collinsavings$create_acct_num
-# Stops because account number is assigned
-collinsavings$create_acct_num()
-collinsavings$print()
-```
-
-## How does an active field work?
-
-* Not sold on this, as I don't know if `active` gets its own environment.
- * Any ideas?
-
-
-
-## Reference semantics
-
-* Big difference to note about R6 objects in relation to other objects:
- * R6 objects have reference semantics.
-* The primary consequence of reference semantics is that objects are not copied when modified.
-* If you want to copy an R6 object, you need to use `$clone`.
-* There are some other less obvious consequences:
- * It's harder to reason about code that uses R6 objects, as you need more context.
- * Think about when an R6 object is deleted, you can use `$finalize()` to clean up after yourself.
- * If one of the fields is an R6 object, you must create it inside `$initialize()`, not `R6Class()`
-
-## R6 makes it harder to reason about code
-
-* Reference semantics makes code harder to reason about.
-
-```{r eval=FALSE}
-x <- list(a = 1)
-y <- list(b = 2)
-
-# Here we know the final line only modifies z
-z <- f(x, y)
-
-# vs.
-
-x <- List$new(a = 1)
-y <- List$new(b = 2)
-
-# If x or y is a method, we don't know if it modifies
-# something other than z. Is this a limitation of
-# abstraction?
-z <- f(x, y)
-```
-
-* I understand the basics, but not necessarily the tradeoffs.
- * Anyone care to fill me in?
- * Is this a limitation of abstraction?
-
-## Better sense of what's going on by looking at a finalizer
-
-* Since R6 objects are not copied-on-modified, so they are only deleted once.
-* We can use this characteristic to complement our `$initialize()` with a `$finalize()` method.
- * i.e., to clean up after we delete an R6 object.
- * This could be a way to close a database connection.
-
-```{r eval=FALSE}
-TemporaryFile <- R6Class("TemporaryFile", list(
- path = NULL,
- initialize = function() {
- self$path <- tempfile()
- },
- finalize = function() {
- message("Cleaning up ", self$path)
- unlink(self$path)
- }
-))
-```
-
-```{r eval=FALSE}
-tf <- TemporaryFile$new()
-# The finalizer will clean up, once the R6 object is deleted.
-rm(tf)
-```
-
-## Consequences of R6 fields
-
-* If you use an R6 class as the default value of a field, it will be shared across all instances of the object.
-
-```{r eval=FALSE}
-TemporaryDatabase <- R6Class("TemporaryDatabase", list(
- con = NULL,
- file = TemporaryFile$new(),
- initialize = function() {
- self$con <- DBI::dbConnect(RSQLite::SQLite(), path = file$path)
- },
- finalize = function() {
- DBI::dbDisconnect(self$con)
- }
-))
-
-db_a <- TemporaryDatabase$new()
-db_b <- TemporaryDatabase$new()
-
-db_a$file$path == db_b$file$path
-#> [1] TRUE
-```
-
-* To fix this, we need to move the class method call to `$intialize()`
-
-```{r eval=FALSE}
-TemporaryDatabase <- R6Class("TemporaryDatabase", list(
- con = NULL,
- file = NULL,
- initialize = function() {
- self$file <- TemporaryFile$new()
- self$con <- DBI::dbConnect(RSQLite::SQLite(), path = file$path)
- },
- finalize = function() {
- DBI::dbDisconnect(self$con)
- }
-))
-
-db_a <- TemporaryDatabase$new()
-db_b <- TemporaryDatabase$new()
-
-db_a$file$path == db_b$file$path
-#> [1] FALSE
-```
-
-## Why use R6?
-
-* Book mentions R6 is similar to the built-in reference classes.
-* Then why use R6?
-* R6 is simpler.
- * RC requires you to understand S4.
-* [Comprehensive documentation](https://r6.r-lib.org/articles/Introduction.html).
-* Simpler mechanisms for cross-package subclassing, which just works.
-* R6 separates public and private fields in separate environments, RC stacks everything in the same environment.
-* [R6 is faster](https://r6.r-lib.org/articles/Performance.html).
-* RC is tied to R, so any bug fixes need a newer version of R.
- * This is especially important if you're writing packages that need to work with multiple R versions.
-* R6 and RC are similar, so if you need RC, it will only require a small amount of additional effort to learn RC.
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/hPjaOdprgow")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/LVkDJ28XJUE")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/rCjQTbQ22qc")`
-
-`r knitr::include_url("https://www.youtube.com/embed/ii6xhOzT_HQ")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/i_z6pHavhX0")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/NXmlqK2LxWw")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/EuTubeJ1VUw")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:11:34 Trevin: https://engineering-shiny.org/common-app-caveats.html?q=R6#using-r6-as-data-storage
-00:39:36 Federica Gazzelloni: new R7: https://rconsortium.github.io/OOP-WG/
-00:40:04 Federica Gazzelloni: R7 designed to be a successor to S3 and S4
-00:40:40 Federica Gazzelloni: R6: https://r6.r-lib.org/articles/Introduction.html
-00:52:44 Trevin: https://advanced-r-solutions.rbind.io/r6.html#controlling-access
-01:00:34 Federica Gazzelloni: interesting: https://r-craft.org/r-news/object-oriented-programming-oop-in-r-with-r6-the-complete-guide/
-01:01:58 Trevin: https://hadley.shinyapps.io/cran-downloads/
-01:02:33 Oluwafemi Oyedele: Thank you !!!
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/Q4FA0BB_PeY")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:06:57 Ron Legere: https://arxiv.org/abs/2303.12712
-00:07:07 Ron Legere: ^^ shows some of the power and limitations
-00:39:41 collinberke: https://www.youtube.com/watch?v=3GEFd8rZQgY&list=WL&index=11
-00:49:20 iPhone: Sorry fellas need to jump early. See you next week!
-01:05:21 collinberke: https://github.com/r4ds/bookclub-advr
-01:09:30 Ron Legere: makeActiveBinding
-```
-</details>
diff --git a/slides/15.Rmd b/slides/15.Rmd
@@ -0,0 +1,363 @@
+---
+engine: knitr
+title: S4
+---
+
+## Introduction
+
+Object consists of:
+
+- Slots. Like fields in R6.
+- Methods. Accessed through generics. Dispatched to particular methods.
+
+Uses functions to define classes and their methods:
+
+- `setClass()`. Define class and its components.
+- `setGenerics()`. Define generic functions. Used to dispatch.
+- `setMethods()`. Define methods
+
+## Basics overview
+
+### Set class
+
+Define the class:
+
+```{r}
+setClass("Person",
+ slots = c(
+ name = "character",
+ age = "numeric"
+ )
+)
+```
+
+Create an instance of the class
+
+```{r}
+john <- new("Person", name = "John Smith", age = NA_real_)
+```
+
+
+### Set generics
+
+Define generic functions for setting and getting the age slot
+
+```{r}
+# get the value
+setGeneric("age", function(x) standardGeneric("age"))
+# set the value
+setGeneric("age<-", function(x, value) standardGeneric("age<-"))
+```
+
+### Set methods
+
+Define methods for the generics:
+
+```{r}
+# get the value
+setMethod("age", "Person", function(x) x@age)
+# set the value
+setMethod("age<-", "Person", function(x, value) {
+ x@age <- value
+ x
+})
+
+# set the value
+age(john) <- 50
+# get the value
+age(john)
+```
+
+To give a flavor, there is only one method per slot. In more realistic cases, there might be several methods.
+
+## Details on defining the class
+
+### Inheritance
+
+```{r, eval=FALSE}
+setClass("Employee",
+ contains = "Person",
+ slots = c(
+ boss = "Person"
+ ),
+ prototype = list(
+ boss = new("Person")
+ )
+)
+```
+
+### Instantiation
+
+Create an instance of the class at two levels:
+
+- For developer (you): `methods::new()`
+- For user: constructor function
+
+```{r}
+# how user constructs an instance
+Person <- function(name, age = NA) {
+ age <- as.double(age)
+
+ # how the developer constructs an instance
+ new("Person", name = name, age = age)
+}
+
+Person("Someone")
+```
+
+### Validation
+
+S4 objects
+
+- Check class of slot at creation
+```{r, error = TRUE}
+Person(mtcars)
+```
+
+- Do **not** check other things
+```{r}
+Person("Hadley", age = c(30, 37))
+```
+
+That's where validation comes in--at two stages:
+
+1. At creation
+2. At modification
+
+#### At creation
+
+```{r, error = TRUE}
+setValidity("Person", function(object) {
+ if (length(object@name) != length(object@age)) {
+ "@name and @age must be same length"
+ } else {
+ TRUE
+ }
+})
+
+Person("Hadley", age = c(30, 37))
+```
+
+#### At modification
+
+```{r, error = TRUE}
+# get value
+setGeneric("name", function(x) standardGeneric("name"))
+setMethod("name", "Person", function(x) x@name)
+
+# set value--and assess whether resulting object is valid
+setGeneric("name<-", function(x, value) standardGeneric("name<-"))
+setMethod("name<-", "Person", function(x, value) {
+ x@name <- value
+ validObject(x)
+ x
+})
+
+# normal name; no problem
+name(john) <- "Jon Smythe"
+name(john)
+
+# invalid name; error thrown
+name(john) <- letters
+```
+
+
+## Details on generics and methods
+
+### Dictate dispatch via signature
+
+Specify function arguments to be used in determining method.
+
+```{r}
+setGeneric("myGeneric",
+ function(x, ..., verbose = TRUE) standardGeneric("myGeneric"),
+ signature = "x"
+)
+```
+
+### Define generics
+
+General form:
+
+```{r, eval=FALSE}
+setMethod("myGeneric", "Person", function(x) {
+ # method implementation
+})
+```
+
+Example to print object:
+
+```{r}
+setMethod("show", "Person", function(object) {
+ cat(is(object)[[1]], "\n",
+ " Name: ", object@name, "\n",
+ " Age: ", object@age, "\n",
+ sep = ""
+ )
+})
+john
+```
+
+Example to access slot:
+
+```{r}
+setGeneric("name", function(x) standardGeneric("name"))
+setMethod("name", "Person", function(x) x@name)
+
+name(john)
+```
+
+
+This is how end users should access slots.
+
+## Example: `lubridate::period()`
+
+### Define the class
+
+```{r, eval=FALSE}
+setClass("Period",
+ # inherits from these classes
+ contains = c("Timespan", "numeric"),
+ # has slots for time components
+ slots = c(
+ year = "numeric",
+ month = "numeric",
+ day = "numeric",
+ hour = "numeric",
+ minute = "numeric"
+ ),
+ # defines prototype as period of zero duration for all slots
+ prototype = prototype(year = 0, month = 0, day = 0, hour = 0, minute = 0),
+ # check validity with `check_period` function; see section below
+ validity = check_period
+)
+```
+
+See source code [here](https://github.com/tidyverse/lubridate/blob/0bb49b21c88736240219dc67e7ed0eb3df15d9b1/R/periods.r#L90)
+
+### Validate object
+
+Check whether object is valid--notably if all arugments have the same length and are integers.
+
+```{r, eval=FALSE}
+check_period <- function(object) {
+ # start with an empty vector of error messages
+ errors <- character()
+
+ # check length of object's data
+ length(object@.Data) -> n
+ # check length of each slot
+ lengths <- c(
+ length(object@year),
+ length(object@month),
+ length(object@day),
+ length(object@hour),
+ length(object@minute)
+ )
+
+ # if length of any slot is different than overall length, compose error message
+ if (any(lengths != n)) {
+ msg <- paste("Inconsistent lengths: year = ", lengths[1],
+ ", month = ", lengths[2],
+ ", day = ", lengths[3],
+ ", hour = ", lengths[4],
+ ", minute = ", lengths[5],
+ ", second = ", n,
+ sep = ""
+ )
+ # add just-composed error to vector of error messages
+ errors <- c(errors, msg)
+ }
+
+ values <- c(object@year, object@month, object@day, object@hour, object@minute)
+ values <- na.omit(values)
+ if (sum(values - trunc(values))) {
+ msg <- "periods must have integer values"
+ errors <- c(errors, msg)
+ }
+
+ if (length(errors) == 0) {
+ TRUE
+ } else {
+ errors
+ }
+}
+```
+
+
+See source code [here](https://github.com/tidyverse/lubridate/blob/0bb49b21c88736240219dc67e7ed0eb3df15d9b1/R/periods.r#L6).
+
+### Set methods
+
+Show period:
+
+```{r, eval=FALSE}
+#' @export
+setMethod("show", signature(object = "Period"), function(object) {
+ if (length(object@.Data) == 0) {
+ cat("<Period[0]>\n")
+ } else {
+ print(format(object))
+ }
+})
+
+#' @export
+format.Period <- function(x, ...) {
+ if (length(x) == 0) {
+ return(character())
+ }
+
+ show <- paste(
+ x@year, "y ", x@month, "m ", x@day, "d ",
+ x@hour, "H ", x@minute, "M ", x@.Data, "S",
+ sep = ""
+ )
+ start <- regexpr("[-1-9]|(0\\.)", show)
+ show <- ifelse(start > 0, substr(show, start, nchar(show)), "0S")
+
+ show[is.na(x)] <- NA
+ show
+}
+```
+
+See source code [here](https://github.com/tidyverse/lubridate/blob/0bb49b21c88736240219dc67e7ed0eb3df15d9b1/R/periods.r#L195)
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/a1jzpWiksyA")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/bzo37PHCM1I")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/WWnJ5Cl-aTE")`
+
+`r knitr::include_url("https://www.youtube.com/embed/_byYFTQHp1Y")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/M8Poajmj-HU")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/unNfE1fDFEY")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/q1-QUFJsbLA")`
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/puvaJtv9gQw")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+01:09:37 Ron Legere: https://en.wikipedia.org/wiki/Composition_over_inheritance
+```
+</details>
diff --git a/slides/15_S4.Rmd b/slides/15_S4.Rmd
@@ -1,360 +0,0 @@
-# S4
-
-## Introduction
-
-Object consists of:
-
-- Slots. Like fields in R6.
-- Methods. Accessed through generics. Dispatched to particular methods.
-
-Uses functions to define classes and their methods:
-
-- `setClass()`. Define class and its components.
-- `setGenerics()`. Define generic functions. Used to dispatch.
-- `setMethods()`. Define methods
-
-## Basics overview
-
-### Set class
-
-Define the class:
-
-```{r}
-setClass("Person",
- slots = c(
- name = "character",
- age = "numeric"
- )
-)
-```
-
-Create an instance of the class
-
-```{r}
-john <- new("Person", name = "John Smith", age = NA_real_)
-```
-
-
-### Set generics
-
-Define generic functions for setting and getting the age slot
-
-```{r}
-# get the value
-setGeneric("age", function(x) standardGeneric("age"))
-# set the value
-setGeneric("age<-", function(x, value) standardGeneric("age<-"))
-```
-
-### Set methods
-
-Define methods for the generics:
-
-```{r}
-# get the value
-setMethod("age", "Person", function(x) x@age)
-# set the value
-setMethod("age<-", "Person", function(x, value) {
- x@age <- value
- x
-})
-
-# set the value
-age(john) <- 50
-# get the value
-age(john)
-```
-
-To give a flavor, there is only one method per slot. In more realistic cases, there might be several methods.
-
-## Details on defining the class
-
-### Inheritance
-
-```{r, eval=FALSE}
-setClass("Employee",
- contains = "Person",
- slots = c(
- boss = "Person"
- ),
- prototype = list(
- boss = new("Person")
- )
-)
-```
-
-### Instantiation
-
-Create an instance of the class at two levels:
-
-- For developer (you): `methods::new()`
-- For user: constructor function
-
-```{r}
-# how user constructs an instance
-Person <- function(name, age = NA) {
- age <- as.double(age)
-
- # how the developer constructs an instance
- new("Person", name = name, age = age)
-}
-
-Person("Someone")
-```
-
-### Validation
-
-S4 objects
-
-- Check class of slot at creation
-```{r, error = TRUE}
-Person(mtcars)
-```
-
-- Do **not** check other things
-```{r}
-Person("Hadley", age = c(30, 37))
-```
-
-That's where validation comes in--at two stages:
-
-1. At creation
-2. At modification
-
-#### At creation
-
-```{r, error = TRUE}
-setValidity("Person", function(object) {
- if (length(object@name) != length(object@age)) {
- "@name and @age must be same length"
- } else {
- TRUE
- }
-})
-
-Person("Hadley", age = c(30, 37))
-```
-
-#### At modification
-
-```{r, error = TRUE}
-# get value
-setGeneric("name", function(x) standardGeneric("name"))
-setMethod("name", "Person", function(x) x@name)
-
-# set value--and assess whether resulting object is valid
-setGeneric("name<-", function(x, value) standardGeneric("name<-"))
-setMethod("name<-", "Person", function(x, value) {
- x@name <- value
- validObject(x)
- x
-})
-
-# normal name; no problem
-name(john) <- "Jon Smythe"
-name(john)
-
-# invalid name; error thrown
-name(john) <- letters
-```
-
-
-## Details on generics and methods
-
-### Dictate dispatch via signature
-
-Specify function arguments to be used in determining method.
-
-```{r}
-setGeneric("myGeneric",
- function(x, ..., verbose = TRUE) standardGeneric("myGeneric"),
- signature = "x"
-)
-```
-
-### Define generics
-
-General form:
-
-```{r, eval=FALSE}
-setMethod("myGeneric", "Person", function(x) {
- # method implementation
-})
-```
-
-Example to print object:
-
-```{r}
-setMethod("show", "Person", function(object) {
- cat(is(object)[[1]], "\n",
- " Name: ", object@name, "\n",
- " Age: ", object@age, "\n",
- sep = ""
- )
-})
-john
-```
-
-Example to access slot:
-
-```{r}
-setGeneric("name", function(x) standardGeneric("name"))
-setMethod("name", "Person", function(x) x@name)
-
-name(john)
-```
-
-
-This is how end users should access slots.
-
-## Example: `lubridate::period()`
-
-### Define the class
-
-```{r, eval=FALSE}
-setClass("Period",
- # inherits from these classes
- contains = c("Timespan", "numeric"),
- # has slots for time components
- slots = c(
- year = "numeric",
- month = "numeric",
- day = "numeric",
- hour = "numeric",
- minute = "numeric"
- ),
- # defines prototype as period of zero duration for all slots
- prototype = prototype(year = 0, month = 0, day = 0, hour = 0, minute = 0),
- # check validity with `check_period` function; see section below
- validity = check_period
-)
-```
-
-See source code [here](https://github.com/tidyverse/lubridate/blob/0bb49b21c88736240219dc67e7ed0eb3df15d9b1/R/periods.r#L90)
-
-### Validate object
-
-Check whether object is valid--notably if all arugments have the same length and are integers.
-
-```{r, eval=FALSE}
-check_period <- function(object) {
- # start with an empty vector of error messages
- errors <- character()
-
- # check length of object's data
- length(object@.Data) -> n
- # check length of each slot
- lengths <- c(
- length(object@year),
- length(object@month),
- length(object@day),
- length(object@hour),
- length(object@minute)
- )
-
- # if length of any slot is different than overall length, compose error message
- if (any(lengths != n)) {
- msg <- paste("Inconsistent lengths: year = ", lengths[1],
- ", month = ", lengths[2],
- ", day = ", lengths[3],
- ", hour = ", lengths[4],
- ", minute = ", lengths[5],
- ", second = ", n,
- sep = ""
- )
- # add just-composed error to vector of error messages
- errors <- c(errors, msg)
- }
-
- values <- c(object@year, object@month, object@day, object@hour, object@minute)
- values <- na.omit(values)
- if (sum(values - trunc(values))) {
- msg <- "periods must have integer values"
- errors <- c(errors, msg)
- }
-
- if (length(errors) == 0) {
- TRUE
- } else {
- errors
- }
-}
-```
-
-
-See source code [here](https://github.com/tidyverse/lubridate/blob/0bb49b21c88736240219dc67e7ed0eb3df15d9b1/R/periods.r#L6).
-
-### Set methods
-
-Show period:
-
-```{r, eval=FALSE}
-#' @export
-setMethod("show", signature(object = "Period"), function(object) {
- if (length(object@.Data) == 0) {
- cat("<Period[0]>\n")
- } else {
- print(format(object))
- }
-})
-
-#' @export
-format.Period <- function(x, ...) {
- if (length(x) == 0) {
- return(character())
- }
-
- show <- paste(
- x@year, "y ", x@month, "m ", x@day, "d ",
- x@hour, "H ", x@minute, "M ", x@.Data, "S",
- sep = ""
- )
- start <- regexpr("[-1-9]|(0\\.)", show)
- show <- ifelse(start > 0, substr(show, start, nchar(show)), "0S")
-
- show[is.na(x)] <- NA
- show
-}
-```
-
-See source code [here](https://github.com/tidyverse/lubridate/blob/0bb49b21c88736240219dc67e7ed0eb3df15d9b1/R/periods.r#L195)
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/a1jzpWiksyA")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/bzo37PHCM1I")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/WWnJ5Cl-aTE")`
-
-`r knitr::include_url("https://www.youtube.com/embed/_byYFTQHp1Y")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/M8Poajmj-HU")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/unNfE1fDFEY")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/q1-QUFJsbLA")`
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/puvaJtv9gQw")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-01:09:37 Ron Legere: https://en.wikipedia.org/wiki/Composition_over_inheritance
-```
-</details>
diff --git a/slides/16.Rmd b/slides/16.Rmd
@@ -0,0 +1,397 @@
+---
+engine: knitr
+title: Trade-offs
+---
+
+## Learning objectives:
+
+- Understand the Trade-offs between S3, R6 and S4
+
+- Brief intro to S7 (the object system formerly known as R7)
+
+
+## Introduction {-}
+
+* We have three OOP systems introduced so far (S3, S4, R6)
+
+* At the current time (pre - S7?) Hadley recommends use S3 by default: It's simple and widely used throughout base R and CRAN.
+
+* If you have experience in other languages, *Resist* the temptation to use R6 even though it will feel more familiar!
+
+
+## S4 versus S3 {-}
+
+**Which functional object system to use, S3 or S4? **
+
+- **S3** is a simple and flexible system.
+
+ - Good for small teams who need flexibility and immediate payoffs.
+
+ - Commonly used throughout base R and CRAN
+
+ - Flexibility can cause problems, more complex systems might require formal conventions
+
+
+- **S4** is a more formal, strict system.
+
+ - Good for large projects and large teams
+
+ - Used by Bioconductor project
+
+ - Requires significant up front investment in design, but payoff is a robust system that enforces conventions.
+
+ - S4 documentation is challenging to use.
+
+
+
+## R6 versus S3 {-}
+
+**R6** is built on **encapsulated objects**, rather than generic functions.
+
+
+**Big differences: general trade-offs**
+
+* A generic is a regular function so it lives in the global namespace. An R6 method belongs to an object so it lives in a local namespace. This influences how we think about naming.
+
+* R6's reference semantics allow methods to simultaneously return a value and modify an object. This solves a painful problem called "threading state".
+
+* You invoke an R6 method using `$`, which is an infix operator. If you set up your methods correctly you can use chains of method calls as an alternative to the pipe.
+
+## Namespacing {-}
+
+**Where methods are found?**
+
+- in S3, **Generic functions** are **global** and live in the **global namespace**
+
+ - Advantage: Uniform API: `summary`, `print`, `predict` etc.
+
+ - Disadvantage: Must be careful about creating new methods! Homonyms must be avoided, don't define `plot(bank_heist)`
+
+
+- in R6, **Encapsulated methods** are **local**: objects with a **scope**
+
+ - Advantage: No problems with homonyms: meaning of `bank_heist$plot()` is clear and unambiguous.
+
+ - Disadvantage: Lack of a uniform API, except by convention.
+
+
+## Threading state {-}
+
+
+In S3 the challenge is to return a value and modify the object.
+
+
+```{r}
+new_stack <- function(items = list()) {
+ structure(list(items = items), class = "stack")
+}
+
+push <- function(x, y) {
+ x$items <- c(x$items, list(y))
+ x
+}
+```
+
+No problem with that, but what about when we want to pop a value? We need to return two things.
+
+```{r}
+pop <- function(x) {
+ n <- length(x$items)
+
+ item <- x$items[[n]]
+ x$items <- x$items[-n]
+
+ list(item = item, x = x)
+}
+```
+
+The usage is a bit awkward:
+
+```{r}
+s <- new_stack()
+s <- push(s, 10)
+s <- push(s, 20)
+
+out <- pop(s)
+# Update state:
+s <- out$x
+
+print(out$item)
+```
+
+
+In python and other languages we have structured binding to make this less awkward. R has the {zeallot} package. For more, see this vignette:
+
+```{r 16-Trade-offs-5, eval=FALSE}
+vignette('unpacking-assignment')
+```
+
+However, this is all easier in R6 due to the reference semantics!
+
+```{r}
+Stack <- R6::R6Class("Stack", list(
+ items = list(),
+ push = function(x) {
+ self$items <- c(self$items, x)
+ invisible(self)
+ },
+ pop = function() {
+ item <- self$items[[self$length()]]
+ self$items <- self$items[-self$length()]
+ item
+ },
+ length = function() {
+ length(self$items)
+ }
+))
+
+s <- Stack$new()
+s$push(10)
+s$push(20)
+s$pop()
+```
+
+
+## Method chaining {-}
+
+Useful to compose functions from left-to-right.
+
+Use of the operators:
+
+- S3: `|>` or `%>%`
+
+- R6: `$`
+
+```{r}
+s$push(44)$push(32)$pop()
+```
+
+
+## Umm... what about S7 ? {-}
+
+```{r standards, echo = FALSE, fig.cap = "https://xkcd.com/927/"}
+
+knitr::include_graphics("https://imgs.xkcd.com/comics/standards_2x.png")
+
+```
+
+### Primary references: {-}
+
+* Docs: <https://rconsortium.github.io/S7/>
+
+* Talk by Hadley Wickham <https://www.youtube.com/watch?v=P3FxCvSueag>
+
+## S7 briefly {-}
+
+* S7 is a 'better' version of S3 with some of the 'strictness' of S4.
+
+```
+"A little bit more complex then S3, with almost all of the features,
+all of the payoff of S4" - rstudio conf 2022, Hadley Wickham
+```
+* S3 + S4 = S7
+
+* Compatible with S3: S7 objects are S3 objects! Can even extend an S3 object with S7
+
+* Somewhat compatible with S4, see [compatability vignette](https://rconsortium.github.io/S7/articles/compatibility.html) for details.
+
+* Helpful error messages!
+
+* Note that it was previously called R7, but it was changed to "S7" to better reflect that it is functional not encapsulated!
+
+## Abbreviated introduction based on the vignette {-}
+
+To install (it's now on CRAN):
+```{r, eval=FALSE}
+install.packages("S7")
+```
+
+
+```{r, eval=FALSE}
+library(S7)
+dog <- new_class("dog", properties = list(
+ name = class_character,
+ age = class_numeric
+))
+dog
+
+
+#> <S7_class>
+#> @ name : dog
+#> @ parent: <S7_object>
+#> @ properties:
+#> $ name: <character>
+#> $ age : <integer> or <double>
+```
+
+Note the `class_character`, these are S7 classes corresponding to the base classes.
+
+Now to use it to create an object of class _dog_:
+
+```{r, eval = FALSE}
+lola <- dog(name = "Lola", age = 11)
+lola
+
+#> <dog>
+#> @ name: chr "Lola"
+#> @ age : num 11
+```
+
+Properties can be set/read with `@`, with automatic validation ('safety rails') based on the type!
+
+```{r, eval = FALSE}
+
+lola@age <- 12
+lola@age
+
+#> 12
+
+lola@age <- "twelve"
+
+#> Error: <dog>@age must be <integer> or <double>, not <character>
+
+```
+
+Note the helpful error message!
+
+Like S3 (and S4) S7 has generics, implemented with `new_generic` and `method` for particular methods:
+
+```{r, eval = FALSE}
+speak <- new_generic("speak", "x")
+
+method(speak, dog) <- function(x) {
+ "Woof"
+}
+
+speak(lola)
+
+#> [1] "Woof"
+```
+
+If we have another class, we can implement the generic for that too:
+
+```{r, eval = FALSE}
+cat <- new_class("cat", properties = list(
+ name = class_character,
+ age = class_double
+))
+method(speak, cat) <- function(x) {
+ "Meow"
+}
+
+fluffy <- cat(name = "Fluffy", age = 5)
+speak(fluffy)
+
+#> [1] "Meow"
+```
+
+Helpful messages:
+
+```{r, eval = FALSE}
+speak
+
+#> <S7_generic> speak(x, ...) with 2 methods:
+#> 1: method(speak, cat)
+#> 2: method(speak, dog)
+```
+
+
+"most usage of S7 with S3 will just work"
+
+```{r, eval = FALSE}
+method(print, cat) <- function(...) {
+ print("I am a cat.")
+}
+
+print(fluffy)
+#> "I am a cat"
+
+```
+
+*For validators, inheritance, dynamic properties and more, see the [vignette!](https://rconsortium.github.io/S7/articles/S7.html)*
+
+
+## So... switch to S7 ? {-}
+
+$$
+\huge
+\textbf{Soon}^{tm}
+$$
+
+* Not yet... still in development! 
+
+* But consider trying it out:
+
+ * To stay ahead of the curve... S7 will be integrated into base R someday!
+
+ * To contribute feedback to the S7 team!
+
+ * To get "almost all" of the benefits of S4 without the complexity !
+
+* In particular, if you have a new project that might require the complexity of S4, consider S7 instead!
+
+## OOP system comparison {-}
+
+| Characteristic | S3 | S4 | S7 | R6 |
+|-------|------|------|------|------|
+| _Package_ | base R | base R | [S7](https://rconsortium.github.io/S7/) | [R6](https://r6.r-lib.org/) |
+| _Programming type_ | Functional | Functional | Functional | Encapulated |
+| _Complexity_ | Low | High | Medium | High |
+| _Payoff_ | Low | High | High | High |
+| _Team size_ | Small | Small-large | Large | ? |
+| _Namespace_ | Global | Global? | Global? | Local |
+| _Modify in place_ | No | No | No | Yes |
+| _Method chaining_ | `|>` | `|>`? | `|>`? | `$` |
+| _Get/set component_ | `$` | `@` | `@` | `$` |
+| _Create class_ | `class()` or `structure()` with `class` argument | `setClass()` | `new_class()` | `R6Class()` |
+| _Create validator_ | `function()` | `setValidity()` or `validator` argument in `setClass()` | `validator` argument in `new_class()` | `$validate()` |
+| _Create generic_ | `UseMethod()` | `setGeneric()` | `new_generic()` | NA |
+| _Create method_ | `function()` assigned to `generic.method` | `setMethod()` | `method()` | `R6Class()` |
+| _Create object_ | `class()` or `structure()` with `class` argument or constructor function | `new()` | Use registered method function | `$new()` |
+| _Additional components_ | attributes | slots | properties | |
+| | | | | |
+
+## Meeting Videos {-}
+
+### Cohort 1 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/W1uc8HbyZvI")`
+
+### Cohort 2 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/bzo37PHCM1I")`
+
+### Cohort 3 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/_byYFTQHp1Y")`
+
+### Cohort 4 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/vdKDPBcOc6Y")`
+
+### Cohort 5 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/3EvqtVYTFVM")`
+
+### Cohort 6 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/vEButxFIvLw")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:11:36 Oluwafemi Oyedele: I have not built anything with them!!!
+00:16:31 Arthur Shaw: https://cran.r-project.org/web/packages/sp/index.html
+00:19:05 Arthur Shaw: Apparently Hadley asked the same question we're asking several years ago: https://stackoverflow.com/questions/5437238/which-packages-make-good-use-of-s4-objects
+00:19:16 Trevin: HA
+00:23:54 Trevin: Your audio is breaking up Federica
+01:06:58 Federica Gazzelloni: https://mastering-shiny.org/reactive-motivation.html?q=R6#event-driven
+01:07:37 Federica Gazzelloni: https://engineering-shiny.org/common-app-caveats.html?q=R6#using-r6-as-data-storage
+01:10:52 Oluwafemi Oyedele: Thank you !!!
+```
+</details>
+
+### Cohort 7 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/2vxnzqWp-OU")`
diff --git a/slides/16_Trade-offs.Rmd b/slides/16_Trade-offs.Rmd
@@ -1,394 +0,0 @@
-# Trade-offs
-
-**Learning objectives:**
-
-- Understand the Trade-offs between S3, R6 and S4
-
-- Brief intro to S7 (the object system formerly known as R7)
-
-
-## Introduction {-}
-
-* We have three OOP systems introduced so far (S3, S4, R6)
-
-* At the current time (pre - S7?) Hadley recommends use S3 by default: It's simple and widely used throughout base R and CRAN.
-
-* If you have experience in other languages, *Resist* the temptation to use R6 even though it will feel more familiar!
-
-
-## S4 versus S3 {-}
-
-**Which functional object system to use, S3 or S4? **
-
-- **S3** is a simple and flexible system.
-
- - Good for small teams who need flexibility and immediate payoffs.
-
- - Commonly used throughout base R and CRAN
-
- - Flexibility can cause problems, more complex systems might require formal conventions
-
-
-- **S4** is a more formal, strict system.
-
- - Good for large projects and large teams
-
- - Used by Bioconductor project
-
- - Requires significant up front investment in design, but payoff is a robust system that enforces conventions.
-
- - S4 documentation is challenging to use.
-
-
-
-## R6 versus S3 {-}
-
-**R6** is built on **encapsulated objects**, rather than generic functions.
-
-
-**Big differences: general trade-offs**
-
-* A generic is a regular function so it lives in the global namespace. An R6 method belongs to an object so it lives in a local namespace. This influences how we think about naming.
-
-* R6's reference semantics allow methods to simultaneously return a value and modify an object. This solves a painful problem called "threading state".
-
-* You invoke an R6 method using `$`, which is an infix operator. If you set up your methods correctly you can use chains of method calls as an alternative to the pipe.
-
-## Namespacing {-}
-
-**Where methods are found?**
-
-- in S3, **Generic functions** are **global** and live in the **global namespace**
-
- - Advantage: Uniform API: `summary`, `print`, `predict` etc.
-
- - Disadvantage: Must be careful about creating new methods! Homonyms must be avoided, don't define `plot(bank_heist)`
-
-
-- in R6, **Encapsulated methods** are **local**: objects with a **scope**
-
- - Advantage: No problems with homonyms: meaning of `bank_heist$plot()` is clear and unambiguous.
-
- - Disadvantage: Lack of a uniform API, except by convention.
-
-
-## Threading state {-}
-
-
-In S3 the challenge is to return a value and modify the object.
-
-
-```{r}
-new_stack <- function(items = list()) {
- structure(list(items = items), class = "stack")
-}
-
-push <- function(x, y) {
- x$items <- c(x$items, list(y))
- x
-}
-```
-
-No problem with that, but what about when we want to pop a value? We need to return two things.
-
-```{r}
-pop <- function(x) {
- n <- length(x$items)
-
- item <- x$items[[n]]
- x$items <- x$items[-n]
-
- list(item = item, x = x)
-}
-```
-
-The usage is a bit awkward:
-
-```{r}
-s <- new_stack()
-s <- push(s, 10)
-s <- push(s, 20)
-
-out <- pop(s)
-# Update state:
-s <- out$x
-
-print(out$item)
-```
-
-
-In python and other languages we have structured binding to make this less awkward. R has the {zeallot} package. For more, see this vignette:
-
-```{r 16-Trade-offs-5, eval=FALSE}
-vignette('unpacking-assignment')
-```
-
-However, this is all easier in R6 due to the reference semantics!
-
-```{r}
-Stack <- R6::R6Class("Stack", list(
- items = list(),
- push = function(x) {
- self$items <- c(self$items, x)
- invisible(self)
- },
- pop = function() {
- item <- self$items[[self$length()]]
- self$items <- self$items[-self$length()]
- item
- },
- length = function() {
- length(self$items)
- }
-))
-
-s <- Stack$new()
-s$push(10)
-s$push(20)
-s$pop()
-```
-
-
-## Method chaining {-}
-
-Useful to compose functions from left-to-right.
-
-Use of the operators:
-
-- S3: `|>` or `%>%`
-
-- R6: `$`
-
-```{r}
-s$push(44)$push(32)$pop()
-```
-
-
-## Umm... what about S7 ? {-}
-
-```{r standards, echo = FALSE, fig.cap = "https://xkcd.com/927/"}
-
-knitr::include_graphics("https://imgs.xkcd.com/comics/standards_2x.png")
-
-```
-
-### Primary references: {-}
-
-* Docs: <https://rconsortium.github.io/S7/>
-
-* Talk by Hadley Wickham <https://www.youtube.com/watch?v=P3FxCvSueag>
-
-## S7 briefly {-}
-
-* S7 is a 'better' version of S3 with some of the 'strictness' of S4.
-
-```
-"A little bit more complex then S3, with almost all of the features,
-all of the payoff of S4" - rstudio conf 2022, Hadley Wickham
-```
-* S3 + S4 = S7
-
-* Compatible with S3: S7 objects are S3 objects! Can even extend an S3 object with S7
-
-* Somewhat compatible with S4, see [compatability vignette](https://rconsortium.github.io/S7/articles/compatibility.html) for details.
-
-* Helpful error messages!
-
-* Note that it was previously called R7, but it was changed to "S7" to better reflect that it is functional not encapsulated!
-
-## Abbreviated introduction based on the vignette {-}
-
-To install (it's now on CRAN):
-```{r, eval=FALSE}
-install.packages("S7")
-```
-
-
-```{r, eval=FALSE}
-library(S7)
-dog <- new_class("dog", properties = list(
- name = class_character,
- age = class_numeric
-))
-dog
-
-
-#> <S7_class>
-#> @ name : dog
-#> @ parent: <S7_object>
-#> @ properties:
-#> $ name: <character>
-#> $ age : <integer> or <double>
-```
-
-Note the `class_character`, these are S7 classes corresponding to the base classes.
-
-Now to use it to create an object of class _dog_:
-
-```{r, eval = FALSE}
-lola <- dog(name = "Lola", age = 11)
-lola
-
-#> <dog>
-#> @ name: chr "Lola"
-#> @ age : num 11
-```
-
-Properties can be set/read with `@`, with automatic validation ('safety rails') based on the type!
-
-```{r, eval = FALSE}
-
-lola@age <- 12
-lola@age
-
-#> 12
-
-lola@age <- "twelve"
-
-#> Error: <dog>@age must be <integer> or <double>, not <character>
-
-```
-
-Note the helpful error message!
-
-Like S3 (and S4) S7 has generics, implemented with `new_generic` and `method` for particular methods:
-
-```{r, eval = FALSE}
-speak <- new_generic("speak", "x")
-
-method(speak, dog) <- function(x) {
- "Woof"
-}
-
-speak(lola)
-
-#> [1] "Woof"
-```
-
-If we have another class, we can implement the generic for that too:
-
-```{r, eval = FALSE}
-cat <- new_class("cat", properties = list(
- name = class_character,
- age = class_double
-))
-method(speak, cat) <- function(x) {
- "Meow"
-}
-
-fluffy <- cat(name = "Fluffy", age = 5)
-speak(fluffy)
-
-#> [1] "Meow"
-```
-
-Helpful messages:
-
-```{r, eval = FALSE}
-speak
-
-#> <S7_generic> speak(x, ...) with 2 methods:
-#> 1: method(speak, cat)
-#> 2: method(speak, dog)
-```
-
-
-"most usage of S7 with S3 will just work"
-
-```{r, eval = FALSE}
-method(print, cat) <- function(...) {
- print("I am a cat.")
-}
-
-print(fluffy)
-#> "I am a cat"
-
-```
-
-*For validators, inheritance, dynamic properties and more, see the [vignette!](https://rconsortium.github.io/S7/articles/S7.html)*
-
-
-## So... switch to S7 ? {-}
-
-$$
-\huge
-\textbf{Soon}^{tm}
-$$
-
-* Not yet... still in development! 
-
-* But consider trying it out:
-
- * To stay ahead of the curve... S7 will be integrated into base R someday!
-
- * To contribute feedback to the S7 team!
-
- * To get "almost all" of the benefits of S4 without the complexity !
-
-* In particular, if you have a new project that might require the complexity of S4, consider S7 instead!
-
-## OOP system comparison {-}
-
-| Characteristic | S3 | S4 | S7 | R6 |
-|-------|------|------|------|------|
-| _Package_ | base R | base R | [S7](https://rconsortium.github.io/S7/) | [R6](https://r6.r-lib.org/) |
-| _Programming type_ | Functional | Functional | Functional | Encapulated |
-| _Complexity_ | Low | High | Medium | High |
-| _Payoff_ | Low | High | High | High |
-| _Team size_ | Small | Small-large | Large | ? |
-| _Namespace_ | Global | Global? | Global? | Local |
-| _Modify in place_ | No | No | No | Yes |
-| _Method chaining_ | `|>` | `|>`? | `|>`? | `$` |
-| _Get/set component_ | `$` | `@` | `@` | `$` |
-| _Create class_ | `class()` or `structure()` with `class` argument | `setClass()` | `new_class()` | `R6Class()` |
-| _Create validator_ | `function()` | `setValidity()` or `validator` argument in `setClass()` | `validator` argument in `new_class()` | `$validate()` |
-| _Create generic_ | `UseMethod()` | `setGeneric()` | `new_generic()` | NA |
-| _Create method_ | `function()` assigned to `generic.method` | `setMethod()` | `method()` | `R6Class()` |
-| _Create object_ | `class()` or `structure()` with `class` argument or constructor function | `new()` | Use registered method function | `$new()` |
-| _Additional components_ | attributes | slots | properties | |
-| | | | | |
-
-## Meeting Videos {-}
-
-### Cohort 1 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/W1uc8HbyZvI")`
-
-### Cohort 2 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/bzo37PHCM1I")`
-
-### Cohort 3 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/_byYFTQHp1Y")`
-
-### Cohort 4 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/vdKDPBcOc6Y")`
-
-### Cohort 5 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/3EvqtVYTFVM")`
-
-### Cohort 6 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/vEButxFIvLw")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:11:36 Oluwafemi Oyedele: I have not built anything with them!!!
-00:16:31 Arthur Shaw: https://cran.r-project.org/web/packages/sp/index.html
-00:19:05 Arthur Shaw: Apparently Hadley asked the same question we're asking several years ago: https://stackoverflow.com/questions/5437238/which-packages-make-good-use-of-s4-objects
-00:19:16 Trevin: HA
-00:23:54 Trevin: Your audio is breaking up Federica
-01:06:58 Federica Gazzelloni: https://mastering-shiny.org/reactive-motivation.html?q=R6#event-driven
-01:07:37 Federica Gazzelloni: https://engineering-shiny.org/common-app-caveats.html?q=R6#using-r6-as-data-storage
-01:10:52 Oluwafemi Oyedele: Thank you !!!
-```
-</details>
-
-### Cohort 7 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/2vxnzqWp-OU")`
diff --git a/slides/17.Rmd b/slides/17.Rmd
@@ -0,0 +1,311 @@
+---
+engine: knitr
+title: Big picture
+---
+
+## Learning objectives:
+
+- Become familiar with some metaprogramming principals and how they relate to each other
+- Review vocabulary associated with metaprogramming
+
+```{r}
+library(rlang)
+library(lobstr)
+```
+
+
+## Code is data
+
+- **expression** - Captured code (*call*, *symbol*, *constant*, or *pairlist*)
+- Use `rlang::expr()`[^1] to capture code directly
+
+```{r}
+expr(mean(x, na.rm = TRUE))
+```
+
+- Use `rlang::enexpr()` to capture code indirectly
+
+```{r}
+capture_it <- function(x) { # 'automatically quotes first argument'
+ enexpr(x)
+}
+capture_it(a + b + c)
+```
+
+- 'Captured' code can be modified (like a list)!
+ - First element is the function, next elements are the arguments
+
+```{r}
+f <- expr(f(x = 1, y = 2))
+names(f)
+
+ff <- fff <- f # Create two copies
+
+ff$z <- 3 # Add an argument to one
+fff[[2]] <- NULL # Remove an argument from another
+
+f
+ff
+fff
+```
+
+> More on this next week!
+
+[^1]: Equivalent to `base::bquote()`
+
+## Code is a tree
+
+- **Abstract syntax tree** (AST) - Almost every language represents code as a tree
+- Use `lobstr::ast()` to inspect these code trees
+
+```{r}
+ast(f1(f2(a, b), f3(1)))
+ast(1 + 2 * 3)
+```
+
+
+## Code can generate code
+
+- `rlang::call2()` creates function call
+
+```{r}
+call2("f", 1, 2, 3)
+```
+
+- Going backwards from the tree, can use functions to create calls
+
+```{r}
+call2("f1", call2("f2", "a", "b"), call2("f3", 1))
+call2("+", 1, call2("*", 2, 3))
+```
+
+- `!!` bang-bang - **unquote operator**
+ - inserts previously defined expressions into the current one
+
+```{r}
+xx <- expr(x + x)
+yy <- expr(y + y)
+expr(xx / yy) # Nope!
+
+expr(!!xx / !!yy) # Yup!
+```
+
+```{r}
+cv <- function(var) {
+ var <- enexpr(var) # Get user's expression
+ expr(sd(!!var) / mean(!!var)) # Insert user's expression
+}
+
+cv(x)
+cv(x + y)
+```
+
+- Avoid `paste()` for building code
+ - Problems with non-syntactic names and precedence among expressions
+
+> "You might think this is an esoteric concern, but not worrying about it when generating SQL code in web applications led to SQL injection attacks that have collectively cost billions of dollars."
+
+## Evaluation runs code
+
+- **evaluate** - run/execute an expression
+- need both expression and environment
+- `eval()` uses current environment if not set
+- manual evaluation means you can tweak the environment!
+
+```{r}
+xy <- expr(x + y)
+
+eval(xy, env(x = 1, y = 10))
+eval(xy, env(x = 2, y = 100))
+```
+
+
+## Customizing evaluations with functions
+- Can also bind names to functions in supplied environment
+- Allows overriding function behaviour
+- This is how dplyr generates SQL for working with databases
+
+For example...
+```{r}
+string_math <- function(x) {
+ e <- env(
+ caller_env(),
+ `+` = function(x, y) paste(x, y),
+ `*` = function(x, y) strrep(x, y)
+ )
+
+ eval(enexpr(x), e)
+}
+
+cohort <- 9
+string_math("Hello" + "cohort" + cohort)
+string_math(("dslc" + "is" + "awesome---") * cohort)
+```
+
+
+## Customizing evaluation with data
+
+- Look for variables inside data frame
+- **Data mask** - typically a data frame
+- use `rlang::eval_tidy()` rather than `eval()`
+
+```{r}
+df <- data.frame(x = 1:5, y = sample(5))
+eval_tidy(expr(x + y), df)
+```
+
+Catch user input with `enexpr()`...
+
+```{r}
+with2 <- function(df, expr) {
+ eval_tidy(enexpr(expr), df)
+}
+
+with2(df, x + y)
+```
+
+But there's a bug!
+
+- Evaluates in environment inside `with2()`, but the expression likely refers
+ to objects in the Global environment
+
+```{r}
+with2 <- function(df, expr) {
+ a <- 1000
+ eval_tidy(enexpr(expr), df)
+}
+
+df <- data.frame(x = 1:3)
+a <- 10
+with2(df, x + a)
+```
+
+- Solved with Quosures...
+
+## Quosures
+
+- **Quosures** bundles expression with an environment
+- Use `enquo()` instead of `enexpr()` (with `eval_tidy()`)
+
+```{r}
+with2 <- function(df, expr) {
+ a <- 1000
+ eval_tidy(enquo(expr), df)
+}
+
+df <- data.frame(x = 1:3)
+a <- 10
+with2(df, x + a)
+```
+
+> "Whenever you use a data mask, you must always use `enquo()` instead of `enexpr()`.
+
+This comes back in Chapter 20.
+
+### Which environment is bundled?
+- The environment where the expression is created (i.e. the parent of where
+ `enquo()` is called)
+
+Here, the global environment
+
+```{r}
+with2 <- function(df, expr) {
+ a <- 1000
+ eq <- enquo(expr)
+ message("with2() Parent/Calling environment: ")
+ print(rlang::caller_env())
+ message("with2() environment: ")
+ print(rlang::current_env())
+ message("Quosure details: ")
+ print(eq) # Print the details of the quosure
+ eval_tidy(eq, df)
+}
+
+a <- 10000
+df <- data.frame(x = 1:3)
+with2(df, x + a)
+```
+
+
+Here, the `fun1()` environment
+```{r}
+fun1 <- function(df) {
+ a <- 10
+ message("fun1() Parent/Calling environment: ")
+ print(rlang::caller_env())
+ message("fun1() environment: ")
+ print(rlang::current_env())
+ with2(df, x + a)
+}
+
+a <- 10000
+df <- data.frame(x = 1:3)
+fun1(df)
+```
+
+
+
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/10gRbFMoh7g")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/vKKDU6x3BE8")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/5RLCRFli6QI")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/9MDC12hgOWQ")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/FSm2_TJmhm0")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/Ddd_43gw8nA")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:32:31 Oluwafemi Oyedele: When should eval_tidy() be used instead of eval()?
+base::eval() is sufficient for simple evaluation. Use eval_tidy() when you'd like to support expressions referring to the .data pronoun, or when you need to support quosures.
+00:37:08 Trevin (he/him): https://rlang.r-lib.org/reference/topic-defuse.html
+00:38:38 Federica Gazzelloni: https://rlang.r-lib.org/reference/eval_tidy.html
+00:39:57 Arthur Shaw: Tidy eval book: https://bookdown.dongzhuoer.com/tidyverse/tidyeval/
+00:40:14 Arthur Shaw: Also very useful resource: https://dplyr.tidyverse.org/articles/programming.html
+00:40:28 Trevin (he/him): https://ggplot2.tidyverse.org/reference/aes.html
+00:40:37 Federica Gazzelloni: https://ggplot2.tidyverse.org/reference/tidyeval.html
+00:41:22 Oluwafemi Oyedele: It is Tidyverse design
+00:49:13 Federica Gazzelloni: https://www.youtube.com/watch?v=2NixH3QAerQ&list=PL3x6DOfs2NGi9lH7q-phZlPrl6HKXYDbn&index=15
+00:50:13 Federica Gazzelloni: Minute: 17:04
+00:54:03 Federica Gazzelloni: con <- DBI::dbConnect(RSQLite::SQLite(), filename = ":memory:")
+00:54:18 Federica Gazzelloni: DBI::dbDisconnect(con)
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/MX2vNlvIUFo")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:11:09 Ryan Honomichl: https://medium.com/analytics-vidhya/become-a-better-r-programmer-with-the-awesome-lobstr-package-af97fcd22602
+00:33:03 Ryan Honomichl: https://rlang.r-lib.org/reference/enquo.html
+00:37:30 Ryan Honomichl: https://rlang.r-lib.org/reference/topic-multiple-columns.html
+00:41:00 Ryan Honomichl: brb
+00:44:37 Ron Legere: https://www.rdocumentation.org/packages/srvyr/versions/1.2.0
+00:44:58 Ron Legere: http://gdfe.co/srvyr/
+00:51:51 Stone: https://cran.r-project.org/web/packages/data.table/vignettes/datatable-intro.html
+```
+</details>
diff --git a/slides/17_Big_picture.Rmd b/slides/17_Big_picture.Rmd
@@ -1,308 +0,0 @@
-# Big picture
-
-**Learning objectives:**
-
-- Become familiar with some metaprogramming principals and how they relate to each other
-- Review vocabulary associated with metaprogramming
-
-```{r}
-library(rlang)
-library(lobstr)
-```
-
-
-## Code is data
-
-- **expression** - Captured code (*call*, *symbol*, *constant*, or *pairlist*)
-- Use `rlang::expr()`[^1] to capture code directly
-
-```{r}
-expr(mean(x, na.rm = TRUE))
-```
-
-- Use `rlang::enexpr()` to capture code indirectly
-
-```{r}
-capture_it <- function(x) { # 'automatically quotes first argument'
- enexpr(x)
-}
-capture_it(a + b + c)
-```
-
-- 'Captured' code can be modified (like a list)!
- - First element is the function, next elements are the arguments
-
-```{r}
-f <- expr(f(x = 1, y = 2))
-names(f)
-
-ff <- fff <- f # Create two copies
-
-ff$z <- 3 # Add an argument to one
-fff[[2]] <- NULL # Remove an argument from another
-
-f
-ff
-fff
-```
-
-> More on this next week!
-
-[^1]: Equivalent to `base::bquote()`
-
-## Code is a tree
-
-- **Abstract syntax tree** (AST) - Almost every language represents code as a tree
-- Use `lobstr::ast()` to inspect these code trees
-
-```{r}
-ast(f1(f2(a, b), f3(1)))
-ast(1 + 2 * 3)
-```
-
-
-## Code can generate code
-
-- `rlang::call2()` creates function call
-
-```{r}
-call2("f", 1, 2, 3)
-```
-
-- Going backwards from the tree, can use functions to create calls
-
-```{r}
-call2("f1", call2("f2", "a", "b"), call2("f3", 1))
-call2("+", 1, call2("*", 2, 3))
-```
-
-- `!!` bang-bang - **unquote operator**
- - inserts previously defined expressions into the current one
-
-```{r}
-xx <- expr(x + x)
-yy <- expr(y + y)
-expr(xx / yy) # Nope!
-
-expr(!!xx / !!yy) # Yup!
-```
-
-```{r}
-cv <- function(var) {
- var <- enexpr(var) # Get user's expression
- expr(sd(!!var) / mean(!!var)) # Insert user's expression
-}
-
-cv(x)
-cv(x + y)
-```
-
-- Avoid `paste()` for building code
- - Problems with non-syntactic names and precedence among expressions
-
-> "You might think this is an esoteric concern, but not worrying about it when generating SQL code in web applications led to SQL injection attacks that have collectively cost billions of dollars."
-
-## Evaluation runs code
-
-- **evaluate** - run/execute an expression
-- need both expression and environment
-- `eval()` uses current environment if not set
-- manual evaluation means you can tweak the environment!
-
-```{r}
-xy <- expr(x + y)
-
-eval(xy, env(x = 1, y = 10))
-eval(xy, env(x = 2, y = 100))
-```
-
-
-## Customizing evaluations with functions
-- Can also bind names to functions in supplied environment
-- Allows overriding function behaviour
-- This is how dplyr generates SQL for working with databases
-
-For example...
-```{r}
-string_math <- function(x) {
- e <- env(
- caller_env(),
- `+` = function(x, y) paste(x, y),
- `*` = function(x, y) strrep(x, y)
- )
-
- eval(enexpr(x), e)
-}
-
-cohort <- 9
-string_math("Hello" + "cohort" + cohort)
-string_math(("dslc" + "is" + "awesome---") * cohort)
-```
-
-
-## Customizing evaluation with data
-
-- Look for variables inside data frame
-- **Data mask** - typically a data frame
-- use `rlang::eval_tidy()` rather than `eval()`
-
-```{r}
-df <- data.frame(x = 1:5, y = sample(5))
-eval_tidy(expr(x + y), df)
-```
-
-Catch user input with `enexpr()`...
-
-```{r}
-with2 <- function(df, expr) {
- eval_tidy(enexpr(expr), df)
-}
-
-with2(df, x + y)
-```
-
-But there's a bug!
-
-- Evaluates in environment inside `with2()`, but the expression likely refers
- to objects in the Global environment
-
-```{r}
-with2 <- function(df, expr) {
- a <- 1000
- eval_tidy(enexpr(expr), df)
-}
-
-df <- data.frame(x = 1:3)
-a <- 10
-with2(df, x + a)
-```
-
-- Solved with Quosures...
-
-## Quosures
-
-- **Quosures** bundles expression with an environment
-- Use `enquo()` instead of `enexpr()` (with `eval_tidy()`)
-
-```{r}
-with2 <- function(df, expr) {
- a <- 1000
- eval_tidy(enquo(expr), df)
-}
-
-df <- data.frame(x = 1:3)
-a <- 10
-with2(df, x + a)
-```
-
-> "Whenever you use a data mask, you must always use `enquo()` instead of `enexpr()`.
-
-This comes back in Chapter 20.
-
-### Which environment is bundled?
-- The environment where the expression is created (i.e. the parent of where
- `enquo()` is called)
-
-Here, the global environment
-
-```{r}
-with2 <- function(df, expr) {
- a <- 1000
- eq <- enquo(expr)
- message("with2() Parent/Calling environment: ")
- print(rlang::caller_env())
- message("with2() environment: ")
- print(rlang::current_env())
- message("Quosure details: ")
- print(eq) # Print the details of the quosure
- eval_tidy(eq, df)
-}
-
-a <- 10000
-df <- data.frame(x = 1:3)
-with2(df, x + a)
-```
-
-
-Here, the `fun1()` environment
-```{r}
-fun1 <- function(df) {
- a <- 10
- message("fun1() Parent/Calling environment: ")
- print(rlang::caller_env())
- message("fun1() environment: ")
- print(rlang::current_env())
- with2(df, x + a)
-}
-
-a <- 10000
-df <- data.frame(x = 1:3)
-fun1(df)
-```
-
-
-
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/10gRbFMoh7g")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/vKKDU6x3BE8")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/5RLCRFli6QI")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/9MDC12hgOWQ")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/FSm2_TJmhm0")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/Ddd_43gw8nA")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:32:31 Oluwafemi Oyedele: When should eval_tidy() be used instead of eval()?
-base::eval() is sufficient for simple evaluation. Use eval_tidy() when you'd like to support expressions referring to the .data pronoun, or when you need to support quosures.
-00:37:08 Trevin (he/him): https://rlang.r-lib.org/reference/topic-defuse.html
-00:38:38 Federica Gazzelloni: https://rlang.r-lib.org/reference/eval_tidy.html
-00:39:57 Arthur Shaw: Tidy eval book: https://bookdown.dongzhuoer.com/tidyverse/tidyeval/
-00:40:14 Arthur Shaw: Also very useful resource: https://dplyr.tidyverse.org/articles/programming.html
-00:40:28 Trevin (he/him): https://ggplot2.tidyverse.org/reference/aes.html
-00:40:37 Federica Gazzelloni: https://ggplot2.tidyverse.org/reference/tidyeval.html
-00:41:22 Oluwafemi Oyedele: It is Tidyverse design
-00:49:13 Federica Gazzelloni: https://www.youtube.com/watch?v=2NixH3QAerQ&list=PL3x6DOfs2NGi9lH7q-phZlPrl6HKXYDbn&index=15
-00:50:13 Federica Gazzelloni: Minute: 17:04
-00:54:03 Federica Gazzelloni: con <- DBI::dbConnect(RSQLite::SQLite(), filename = ":memory:")
-00:54:18 Federica Gazzelloni: DBI::dbDisconnect(con)
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/MX2vNlvIUFo")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:11:09 Ryan Honomichl: https://medium.com/analytics-vidhya/become-a-better-r-programmer-with-the-awesome-lobstr-package-af97fcd22602
-00:33:03 Ryan Honomichl: https://rlang.r-lib.org/reference/enquo.html
-00:37:30 Ryan Honomichl: https://rlang.r-lib.org/reference/topic-multiple-columns.html
-00:41:00 Ryan Honomichl: brb
-00:44:37 Ron Legere: https://www.rdocumentation.org/packages/srvyr/versions/1.2.0
-00:44:58 Ron Legere: http://gdfe.co/srvyr/
-00:51:51 Stone: https://cran.r-project.org/web/packages/data.table/vignettes/datatable-intro.html
-```
-</details>
diff --git a/slides/18.Rmd b/slides/18.Rmd
@@ -0,0 +1,847 @@
+---
+engine: knitr
+title: Expressions
+---
+
+## Learning objectives:
+
+* Understand the idea of the abstract syntax tree (AST).
+* Discuss the data structures that underlie the AST:
+ * Constants
+ * Symbols
+ * Calls
+* Explore the idea behind parsing.
+* Explore some details of R's grammar.
+* Discuss the use or recursive functions to compute on the language.
+* Work with three other more specialized data structures:
+ * Pairlists
+ * Missing arguments
+ * Expression vectors
+
+```{r, message = FALSE, warning = FALSE}
+library(rlang)
+library(lobstr)
+```
+
+## Introduction
+
+> To compute on the language, we first need to understand its structure.
+
+* This requires a few things:
+ * New vocabulary.
+ * New tools to inspect and modify expressions.
+ * Approach the use of the language with new ways of thinking.
+* One of the first new ways of thinking is the distinction between an operation and its result.
+
+```{r, error = TRUE}
+y <- x * 10
+```
+
+* We can capture the intent of the code without executing it using the rlang package.
+
+```{r}
+z <- rlang::expr(y <- x * 10)
+
+z
+```
+
+* We can then evaluate the expression using the **base::eval** function.
+
+```{r}
+x <- 4
+
+base::eval(expr(y <- x * 10))
+
+y
+```
+
+### Evaluating multiple expressions
+
+* The function `expression()` allows for multiple expressions, and in some ways it acts similarly to the way files are `source()`d in. That is, we `eval()`uate all of the expressions at once.
+
+* `expression()` returns a vector and can be passed to `eval()`.
+
+```{r}
+z <- expression(x <- 4, x * 10)
+
+eval(z)
+is.atomic(z)
+is.vector(z)
+```
+
+* `exprs()` does not evaluate everything at once. To evaluate each expression, the individual expressions must be evaluated in a loop.
+
+```{r}
+for (i in exprs(x <- 4, x * 10)) {
+print(i)
+print(eval(i))
+}
+```
+
+## Abstract Syntax Tree (AST)
+
+* Expressions are objects that capture the structure of code without evaluating it.
+* Expressions are also called abstract syntax trees (ASTs) because the structure of code is hierarchical and can be naturally represented as a tree.
+* Understanding this tree structure is crucial for inspecting and modifying expressions.
+ * Branches = Calls
+ * Leaves = Symbols and constants
+
+```{r,eval=FALSE}
+f(x, "y", 1)
+```
+
+
+
+### With `lobstr::ast():`
+
+```{r}
+lobstr::ast(f(x, "y", 1))
+```
+
+* Some functions might also contain more calls like the example below:
+
+```{r,eval=FALSE}
+f(g(1, 2), h(3, 4, i())):
+```
+
+
+```{r}
+lobstr::ast(f(g(1, 2), h(3, 4, i())))
+```
+* Read the **hand-drawn diagrams** from left-to-right (ignoring vertical position)
+* Read the **lobstr-drawn diagrams** from top-to-bottom (ignoring horizontal position).
+* The depth within the tree is determined by the nesting of function calls.
+* Depth also determines evaluation order, **as evaluation generally proceeds from deepest-to-shallowest, but this is not guaranteed because of lazy evaluation**.
+
+### Infix calls
+
+> Every call in R can be written in tree form because any call can be written in prefix form.
+
+An infix operator is a function where the function name is placed between its arguments. Prefix form is when then function name comes before the arguments, which are enclosed in parentheses. [Note that the name infix comes from the words prefix and suffix.]
+
+```{r}
+y <- x * 10
+`<-`(y, `*`(x, 10))
+```
+
+* A characteristic of the language is that infix functions can always be written as prefix functions; therefore, all function calls can be represented using an AST.
+
+
+
+```{r}
+lobstr::ast(y <- x * 10)
+```
+
+```{r}
+lobstr::ast(`<-`(y, `*`(x, 10)))
+```
+
+* There is no difference between the ASTs for the infix version vs the prefix version, and if you generate an expression with prefix calls, R will still print it in infix form:
+
+```{r}
+rlang::expr(`<-`(y, `*`(x, 10)))
+```
+
+## Expression
+
+* Collectively, the data structures present in the AST are called expressions.
+* These include:
+ 1. Constants
+ 2. Symbols
+ 3. Calls
+ 4. Pairlists
+
+### Constants
+
+* Scalar constants are the simplest component of the AST.
+* A constant is either **NULL** or a **length-1** atomic vector (or scalar)
+ * e.g., `TRUE`, `1L`, `2.5`, `"x"`, or `"hello"`.
+* We can test for a constant with `rlang::is_syntactic_literal()`.
+* Constants are self-quoting in the sense that the expression used to represent a constant is the same constant:
+
+```{r}
+identical(expr(TRUE), TRUE)
+identical(expr(1), 1)
+identical(expr(2L), 2L)
+identical(expr("x"), "x")
+identical(expr("hello"), "hello")
+```
+
+### Symbols
+
+* A symbol represents the name of an object.
+ * `x`
+ * `mtcars`
+ * `mean`
+* In base R, the terms symbol and name are used interchangeably (i.e., `is.name()` is identical to `is.symbol()`), but this book used symbol consistently because **"name"** has many other meanings.
+* You can create a symbol in two ways:
+ 1. by capturing code that references an object with `expr()`.
+ 2. turning a string into a symbol with `rlang::sym()`.
+
+```{r}
+expr(x)
+```
+
+```{r}
+sym("x")
+```
+
+* A symbol can be turned back into a string with `as.character()` or `rlang::as_string()`.
+* `as_string()` has the advantage of clearly signalling that you’ll get a character vector of length 1.
+
+```{r}
+as_string(expr(x))
+```
+
+* We can recognize a symbol because it is printed without quotes
+
+```{r}
+expr(x)
+```
+
+* `str()` tells you that it is a symbol, and `is.symbol()` is TRUE:
+
+```{r}
+str(expr(x))
+```
+
+```{r}
+is.symbol(expr(x))
+```
+
+* The symbol type is not vectorised, i.e., a symbol is always length 1.
+* If you want multiple symbols, you’ll need to put them in a list, using `rlang::syms()`.
+
+Note that `as_string()` will not work on expressions which are not symbols.
+
+```{r}
+#| error: true
+as_string(expr(x+y))
+```
+
+
+### Calls
+
+* A call object represents a captured function call.
+* Call objects are a special type of list.
+ * The first component specifies the function to call (usually a symbol, i.e., the name fo the function).
+ * The remaining elements are the arguments for that call.
+* Call objects create branches in the AST, because calls can be nested inside other calls.
+* You can identify a call object when printed because it looks just like a function call.
+* Confusingly `typeof()` and `str()` print language for call objects (where we might expect it to return that it is a "call" object), but `is.call()` returns TRUE:
+
+```{r}
+lobstr::ast(read.table("important.csv", row.names = FALSE))
+```
+
+```{r}
+x <- expr(read.table("important.csv", row.names = FALSE))
+```
+
+```{r}
+typeof(x)
+```
+
+```{r}
+is.call(x)
+```
+
+### Subsetting
+
+* Calls generally behave like lists.
+* Since they are list-like, you can use standard subsetting tools.
+* The first element of the call object is the function to call, which is usually a symbol:
+
+```{r}
+x[[1]]
+```
+
+```{r}
+is.symbol(x[[1]])
+```
+* The remainder of the elements are the arguments:
+
+```{r}
+is.symbol(x[-1])
+as.list(x[-1])
+```
+* We can extract individual arguments with [[ or, if named, $:
+
+```{r}
+x[[2]]
+```
+
+```{r}
+x$row.names
+```
+
+* We can determine the number of arguments in a call object by subtracting 1 from its length:
+
+```{r}
+length(x) - 1
+```
+
+* Extracting specific arguments from calls is challenging because of R’s flexible rules for argument matching:
+ * It could potentially be in any location, with the full name, with an abbreviated name, or with no name.
+
+* To work around this problem, you can use `rlang::call_standardise()` which standardizes all arguments to use the full name:
+
+```{r}
+rlang::call_standardise(x)
+```
+
+* But If the function uses ... it’s not possible to standardise all arguments.
+* Calls can be modified in the same way as lists:
+
+```{r}
+x$header <- TRUE
+x
+```
+
+### Function position
+
+* The first element of the call object is the function position. This contains the function that will be called when the object is evaluated, and is usually a symbol.
+
+```{r}
+lobstr::ast(foo())
+```
+
+* While R allows you to surround the name of the function with quotes, the parser converts it to a symbol:
+
+```{r}
+lobstr::ast("foo"())
+```
+
+* However, sometimes the function doesn’t exist in the current environment and you need to do some computation to retrieve it:
+ * For example, if the function is in another package, is a method of an R6 object, or is created by a function factory. In this case, the function position will be occupied by another call:
+
+
+```{r}
+lobstr::ast(pkg::foo(1))
+```
+
+```{r}
+lobstr::ast(obj$foo(1))
+```
+
+```{r}
+lobstr::ast(foo(1)(2))
+```
+
+
+
+### Constructing
+
+* You can construct a call object from its components using `rlang::call2()`.
+* The first argument is the name of the function to call (either as a string, a symbol, or another call).
+* The remaining arguments will be passed along to the call:
+
+```{r}
+call2("mean", x = expr(x), na.rm = TRUE)
+```
+
+```{r}
+call2(expr(base::mean), x = expr(x), na.rm = TRUE)
+```
+
+* Infix calls created in this way still print as usual.
+
+```{r}
+call2("<-", expr(x), 10)
+```
+
+## Parsing and grammar
+
+* **Parsing** - The process by which a computer language takes a string and constructs an expression. Parsing is governed by a set of rules known as a grammar.
+* We are going to use `lobstr::ast()` to explore some of the details of R’s grammar, and then show how you can transform back and forth between expressions and strings.
+* **Operator precedence** - Conventions used by the programming language to resolve ambiguity.
+* Infix functions introduce two sources of ambiguity.
+* The first source of ambiguity arises from infix functions: what does 1 + 2 * 3 yield? Do you get 9 (i.e., (1 + 2) * 3), or 7 (i.e., 1 + (2 * 3))? In other words, which of the two possible parse trees below does R use?
+
+
+
+* Programming languages use conventions called operator precedence to resolve this ambiguity. We can use `ast()` to see what R does:
+
+```{r}
+lobstr::ast(1 + 2 * 3)
+```
+
+* PEMDAS (or BEDMAS or BODMAS, depending on where in the world you grew up) is pretty clear on what to do. Other operator precedence isn't as clear.
+* There’s one particularly surprising case in R:
+ * ! has a much lower precedence (i.e., it binds less tightly) than you might expect.
+ * This allows you to write useful operations like:
+
+```{r}
+lobstr::ast(!x %in% y)
+```
+* **R has over 30 infix operators divided into 18 precedence** groups.
+* While the details are described in `?Syntax`, very few people have memorized the complete ordering.
+* If there’s any confusion, use parentheses!
+
+```{r}
+# override PEMDAS
+lobstr::ast((1 + 2) * 3)
+```
+
+### Associativity
+
+* The second source of ambiguity is introduced by repeated usage of the same infix function.
+
+```{r}
+1 + 2 + 3
+
+# What does R do first?
+(1 + 2) + 3
+
+# or
+1 + (2 + 3)
+```
+
+* In this case it doesn't matter. Other places it might, like in `ggplot2`.
+
+* In R, most operators are left-associative, i.e., the operations on the left are evaluated first:
+
+```{r}
+lobstr::ast(1 + 2 + 3)
+```
+
+* There are two exceptions to the left-associative rule:
+ 1. exponentiation
+ 2. assignment
+
+```{r}
+lobstr::ast(2 ^ 2 ^ 3)
+```
+
+```{r}
+lobstr::ast(x <- y <- z)
+```
+
+### Parsing and deparsing
+
+* Parsing - turning characters you've typed into an AST (i.e., from strings to expressions).
+* R usually takes care of parsing code for us.
+* But occasionally you have code stored as a string, and you want to parse it yourself.
+* You can do so using `rlang::parse_expr()`:
+
+```{r}
+x1 <- "y <- x + 10"
+x1
+is.call(x1)
+```
+
+```{r}
+x2 <- rlang::parse_expr(x1)
+x2
+is.call(x2)
+```
+
+* `parse_expr()` always returns a single expression.
+* If you have multiple expression separated by `;` or `,`, you’ll need to use `rlang::parse_exprs()` which is the plural version of `rlang::parse_expr()`. It returns a list of expressions:
+
+```{r}
+x3 <- "a <- 1; a + 1"
+```
+
+```{r}
+rlang::parse_exprs(x3)
+```
+
+* If you find yourself parsing strings into expressions often, **quasiquotation** may be a safer approach.
+ * More about quasiquaotation in Chapter 19.
+* The inverse of parsing is deparsing.
+* **Deparsing** - given an expression, you want the string that would generate it.
+* Deparsing happens automatically when you print an expression.
+* You can get the string with `rlang::expr_text()`:
+* Parsing and deparsing are not symmetric.
+ * Parsing creates the AST which means that we lose backticks around ordinary names, comments, and whitespace.
+
+```{r}
+cat(expr_text(expr({
+ # This is a comment
+ x <- `x` + 1
+})))
+```
+
+## Using the AST to solve more complicated problems
+
+* Here we focus on what we learned to perform recursion on the AST.
+* Two parts of a recursive function:
+ * Recursive case: handles the nodes in the tree. Typically, you’ll do something to each child of a node, usually calling the recursive function again, and then combine the results back together again. For expressions, you’ll need to handle calls and pairlists (function arguments).
+ * Base case: handles the leaves of the tree. The base cases ensure that the function eventually terminates, by solving the simplest cases directly. For expressions, you need to handle symbols and constants in the base case.
+
+
+### Two helper functions
+
+* First, we need an `epxr_type()` function to return the type of expression element as a string.
+
+```{r}
+expr_type <- function(x) {
+ if (rlang::is_syntactic_literal(x)) {
+ "constant"
+ } else if (is.symbol(x)) {
+ "symbol"
+ } else if (is.call(x)) {
+ "call"
+ } else if (is.pairlist(x)) {
+ "pairlist"
+ } else {
+ typeof(x)
+ }
+}
+```
+
+```{r}
+expr_type(expr("a"))
+expr_type(expr(x))
+expr_type(expr(f(1, 2)))
+```
+
+* Second, we need a wrapper function to handle exceptions.
+
+```{r}
+switch_expr <- function(x, ...) {
+ switch(expr_type(x),
+ ...,
+ stop("Don't know how to handle type ", typeof(x), call. = FALSE)
+ )
+}
+```
+
+* Lastly, we can write a basic template that walks the AST using the `switch()` statement.
+
+```{r,}
+recurse_call <- function(x) {
+ switch_expr(x,
+ # Base cases
+ symbol = ,
+ constant = ,
+
+ # Recursive cases
+ call = ,
+ pairlist =
+ )
+}
+```
+
+### Specific use cases for `recurse_call()`
+
+### Example 1: Finding F and T
+
+* Using `F` and `T` in our code rather than `FALSE` and `TRUE` is bad practice.
+* Say we want to walk the AST to find times when we use `F` and `T`.
+* Start off by finding the type of `T` vs `TRUE`.
+
+```{r}
+expr_type(expr(TRUE))
+
+expr_type(expr(T))
+```
+
+* With this knowledge, we can now write the base cases of our recursive function.
+* The logic is as follows:
+ * A constant is never a logical abbreviation and a symbol is an abbreviation if it is "F" or "T":
+
+```{r}
+logical_abbr_rec <- function(x) {
+ switch_expr(x,
+ constant = FALSE,
+ symbol = as_string(x) %in% c("F", "T")
+ )
+}
+```
+
+```{r}
+logical_abbr_rec(expr(TRUE))
+logical_abbr_rec(expr(T))
+```
+
+* It's best practice to write another wrapper, assuming every input you receive will be an expression.
+
+```{r}
+logical_abbr <- function(x) {
+ logical_abbr_rec(enexpr(x))
+}
+
+logical_abbr(T)
+logical_abbr(FALSE)
+```
+
+#### Next step: code for the recursive cases
+
+* Here we want to do the same thing for calls and for pairlists.
+* Here's the logic: recursively apply the function to each subcomponent, and return `TRUE` if any subcomponent contains a logical abbreviation.
+* This is simplified by using the `purrr::some()` function, which iterates over a list and returns `TRUE` if the predicate function is true for any element.
+
+```{r}
+logical_abbr_rec <- function(x) {
+ switch_expr(x,
+ # Base cases
+ constant = FALSE,
+ symbol = as_string(x) %in% c("F", "T"),
+ # Recursive cases
+ call = ,
+ # Are we sure this is the correct function to use?
+ # Why not logical_abbr_rec?
+ pairlist = purrr::some(x, logical_abbr_rec)
+ )
+}
+
+logical_abbr(mean(x, na.rm = T))
+
+logical_abbr(function(x, na.rm = T) FALSE)
+```
+
+### Example 2: Finding all variables created by assignment
+
+* Listing all the variables is a little more complicated.
+* Figure out what assignment looks like based on the AST.
+
+```{r}
+ast(x <- 10)
+```
+
+* Now we need to decide what data structure we're going to use for the results.
+ * Easiest thing will be to return a character vector.
+ * We would need to use a list if we wanted to return symbols.
+
+### Dealing with the base cases
+
+```{r}
+find_assign_rec <- function(x) {
+ switch_expr(x,
+ constant = ,
+ symbol = character()
+ )
+}
+find_assign <- function(x) find_assign_rec(enexpr(x))
+
+find_assign("x")
+
+find_assign(x)
+
+```
+
+### Dealing with the recursive cases
+
+* Here is the function to flatten pairlists.
+
+```{r}
+flat_map_chr <- function(.x, .f, ...) {
+ purrr::flatten_chr(purrr::map(.x, .f, ...))
+}
+
+flat_map_chr(letters[1:3], ~ rep(., sample(3, 1)))
+```
+
+* Here is the code needed to identify calls.
+
+```{r}
+find_assign_rec <- function(x) {
+ switch_expr(x,
+ # Base cases
+ constant = ,
+ symbol = character(),
+
+ # Recursive cases
+ pairlist = flat_map_chr(as.list(x), find_assign_rec),
+ call = {
+ if (is_call(x, "<-")) {
+ as_string(x[[2]])
+ } else {
+ flat_map_chr(as.list(x), find_assign_rec)
+ }
+ }
+ )
+}
+
+find_assign(a <- 1)
+
+find_assign({
+ a <- 1
+ {
+ b <- 2
+ }
+})
+
+```
+
+### Make the function more robust
+
+* Throw cases at it that we think might break the function.
+* Write a function to handle these cases.
+
+```{r}
+find_assign_call <- function(x) {
+ if (is_call(x, "<-") && is_symbol(x[[2]])) {
+ lhs <- as_string(x[[2]])
+ children <- as.list(x)[-1]
+ } else {
+ lhs <- character()
+ children <- as.list(x)
+ }
+
+ c(lhs, flat_map_chr(children, find_assign_rec))
+}
+
+find_assign_rec <- function(x) {
+ switch_expr(x,
+ # Base cases
+ constant = ,
+ symbol = character(),
+
+ # Recursive cases
+ pairlist = flat_map_chr(x, find_assign_rec),
+ call = find_assign_call(x)
+ )
+}
+
+find_assign(a <- b <- c <- 1)
+
+find_assign(system.time(x <- print(y <- 5)))
+
+```
+
+* This approach certainly is more complicated, but it's important to start simple and move up.
+
+## Specialised data structures
+
+* Pairlists
+* Missing arguments
+* Expression vectors
+
+### Pairlists
+
+* Pairlists are a remnant of R’s past and have been replaced by lists almost everywhere.
+* The only place you are likely to see pairlists in R is when working with calls to the function, as the formal arguments to a function are stored in a pairlist:
+
+```{r}
+f <- expr(function(x, y = 10) x + y)
+```
+
+```{r}
+args <- f[[2]]
+args
+```
+
+```{r}
+typeof(args)
+```
+* Fortunately, whenever you encounter a pairlist, you can treat it just like a regular list:
+
+```{r}
+pl <- pairlist(x = 1, y = 2)
+```
+
+```{r}
+length(pl)
+```
+
+```{r}
+pl$x
+```
+
+### Missing arguments
+
+* Empty symbols
+* To create an empty symbol, you need to use `missing_arg()` or `expr()`.
+
+```{r}
+missing_arg()
+typeof(missing_arg())
+```
+
+* Empty symbols don't print anything.
+ * To check, we need to use `rlang::is_missing()`
+
+```{r}
+is_missing(missing_arg())
+```
+
+* These are usually present in function formals:
+
+```{r}
+f <- expr(function(x, y = 10) x + y)
+
+args <- f[[2]]
+
+
+is_missing(args[[1]])
+```
+
+### Expression vectors
+
+* An expression vector is just a list of expressions.
+ * The only difference is that calling `eval()` on an expression evaluates each individual expression.
+ * Instead, it might be more advantageous to use a list of expressions.
+
+* Expression vectors are only produced by two base functions:
+ `expression()` and `parse()`:
+
+```{r}
+exp1 <- parse(text = c("
+x <- 4
+x
+"))
+exp1
+```
+
+```{r}
+exp2 <- expression(x <- 4, x)
+exp2
+```
+
+```{r}
+typeof(exp1)
+typeof(exp2)
+```
+
+
+- Like calls and pairlists, expression vectors behave like lists:
+
+```{r}
+length(exp1)
+exp1[[1]]
+```
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/2NixH3QAerQ")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/mYOUgzoRcjI")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/5RLCRFli6QI")`
+
+`r knitr::include_url("https://www.youtube.com/embed/F8df5PMNC8Y")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/tSVBlAP5DIY")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/Jc_R4yFsYeE")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/K8w28ee3CR8")`
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/XPs-TI4BYjk")`
+
+`r knitr::include_url("https://www.youtube.com/embed/8LPw_VTBsmQ")`
+
+<details>
+<summary>Meeting chat log</summary>
+```
+00:50:48 Stone: https://www.r-bloggers.com/2018/10/quasiquotation-in-r-via-bquote/
+00:58:26 iPhone: See ya next week!
+```
+</details>
diff --git a/slides/18_Expressions.Rmd b/slides/18_Expressions.Rmd
@@ -1,844 +0,0 @@
-# Expressions
-
-**Learning objectives:**
-
-* Understand the idea of the abstract syntax tree (AST).
-* Discuss the data structures that underlie the AST:
- * Constants
- * Symbols
- * Calls
-* Explore the idea behind parsing.
-* Explore some details of R's grammar.
-* Discuss the use or recursive functions to compute on the language.
-* Work with three other more specialized data structures:
- * Pairlists
- * Missing arguments
- * Expression vectors
-
-```{r, message = FALSE, warning = FALSE}
-library(rlang)
-library(lobstr)
-```
-
-## Introduction
-
-> To compute on the language, we first need to understand its structure.
-
-* This requires a few things:
- * New vocabulary.
- * New tools to inspect and modify expressions.
- * Approach the use of the language with new ways of thinking.
-* One of the first new ways of thinking is the distinction between an operation and its result.
-
-```{r, error = TRUE}
-y <- x * 10
-```
-
-* We can capture the intent of the code without executing it using the rlang package.
-
-```{r}
-z <- rlang::expr(y <- x * 10)
-
-z
-```
-
-* We can then evaluate the expression using the **base::eval** function.
-
-```{r}
-x <- 4
-
-base::eval(expr(y <- x * 10))
-
-y
-```
-
-### Evaluating multiple expressions
-
-* The function `expression()` allows for multiple expressions, and in some ways it acts similarly to the way files are `source()`d in. That is, we `eval()`uate all of the expressions at once.
-
-* `expression()` returns a vector and can be passed to `eval()`.
-
-```{r}
-z <- expression(x <- 4, x * 10)
-
-eval(z)
-is.atomic(z)
-is.vector(z)
-```
-
-* `exprs()` does not evaluate everything at once. To evaluate each expression, the individual expressions must be evaluated in a loop.
-
-```{r}
-for (i in exprs(x <- 4, x * 10)) {
-print(i)
-print(eval(i))
-}
-```
-
-## Abstract Syntax Tree (AST)
-
-* Expressions are objects that capture the structure of code without evaluating it.
-* Expressions are also called abstract syntax trees (ASTs) because the structure of code is hierarchical and can be naturally represented as a tree.
-* Understanding this tree structure is crucial for inspecting and modifying expressions.
- * Branches = Calls
- * Leaves = Symbols and constants
-
-```{r,eval=FALSE}
-f(x, "y", 1)
-```
-
-
-
-### With `lobstr::ast():`
-
-```{r}
-lobstr::ast(f(x, "y", 1))
-```
-
-* Some functions might also contain more calls like the example below:
-
-```{r,eval=FALSE}
-f(g(1, 2), h(3, 4, i())):
-```
-
-
-```{r}
-lobstr::ast(f(g(1, 2), h(3, 4, i())))
-```
-* Read the **hand-drawn diagrams** from left-to-right (ignoring vertical position)
-* Read the **lobstr-drawn diagrams** from top-to-bottom (ignoring horizontal position).
-* The depth within the tree is determined by the nesting of function calls.
-* Depth also determines evaluation order, **as evaluation generally proceeds from deepest-to-shallowest, but this is not guaranteed because of lazy evaluation**.
-
-### Infix calls
-
-> Every call in R can be written in tree form because any call can be written in prefix form.
-
-An infix operator is a function where the function name is placed between its arguments. Prefix form is when then function name comes before the arguments, which are enclosed in parentheses. [Note that the name infix comes from the words prefix and suffix.]
-
-```{r}
-y <- x * 10
-`<-`(y, `*`(x, 10))
-```
-
-* A characteristic of the language is that infix functions can always be written as prefix functions; therefore, all function calls can be represented using an AST.
-
-
-
-```{r}
-lobstr::ast(y <- x * 10)
-```
-
-```{r}
-lobstr::ast(`<-`(y, `*`(x, 10)))
-```
-
-* There is no difference between the ASTs for the infix version vs the prefix version, and if you generate an expression with prefix calls, R will still print it in infix form:
-
-```{r}
-rlang::expr(`<-`(y, `*`(x, 10)))
-```
-
-## Expression
-
-* Collectively, the data structures present in the AST are called expressions.
-* These include:
- 1. Constants
- 2. Symbols
- 3. Calls
- 4. Pairlists
-
-### Constants
-
-* Scalar constants are the simplest component of the AST.
-* A constant is either **NULL** or a **length-1** atomic vector (or scalar)
- * e.g., `TRUE`, `1L`, `2.5`, `"x"`, or `"hello"`.
-* We can test for a constant with `rlang::is_syntactic_literal()`.
-* Constants are self-quoting in the sense that the expression used to represent a constant is the same constant:
-
-```{r}
-identical(expr(TRUE), TRUE)
-identical(expr(1), 1)
-identical(expr(2L), 2L)
-identical(expr("x"), "x")
-identical(expr("hello"), "hello")
-```
-
-### Symbols
-
-* A symbol represents the name of an object.
- * `x`
- * `mtcars`
- * `mean`
-* In base R, the terms symbol and name are used interchangeably (i.e., `is.name()` is identical to `is.symbol()`), but this book used symbol consistently because **"name"** has many other meanings.
-* You can create a symbol in two ways:
- 1. by capturing code that references an object with `expr()`.
- 2. turning a string into a symbol with `rlang::sym()`.
-
-```{r}
-expr(x)
-```
-
-```{r}
-sym("x")
-```
-
-* A symbol can be turned back into a string with `as.character()` or `rlang::as_string()`.
-* `as_string()` has the advantage of clearly signalling that you’ll get a character vector of length 1.
-
-```{r}
-as_string(expr(x))
-```
-
-* We can recognize a symbol because it is printed without quotes
-
-```{r}
-expr(x)
-```
-
-* `str()` tells you that it is a symbol, and `is.symbol()` is TRUE:
-
-```{r}
-str(expr(x))
-```
-
-```{r}
-is.symbol(expr(x))
-```
-
-* The symbol type is not vectorised, i.e., a symbol is always length 1.
-* If you want multiple symbols, you’ll need to put them in a list, using `rlang::syms()`.
-
-Note that `as_string()` will not work on expressions which are not symbols.
-
-```{r}
-#| error: true
-as_string(expr(x+y))
-```
-
-
-### Calls
-
-* A call object represents a captured function call.
-* Call objects are a special type of list.
- * The first component specifies the function to call (usually a symbol, i.e., the name fo the function).
- * The remaining elements are the arguments for that call.
-* Call objects create branches in the AST, because calls can be nested inside other calls.
-* You can identify a call object when printed because it looks just like a function call.
-* Confusingly `typeof()` and `str()` print language for call objects (where we might expect it to return that it is a "call" object), but `is.call()` returns TRUE:
-
-```{r}
-lobstr::ast(read.table("important.csv", row.names = FALSE))
-```
-
-```{r}
-x <- expr(read.table("important.csv", row.names = FALSE))
-```
-
-```{r}
-typeof(x)
-```
-
-```{r}
-is.call(x)
-```
-
-### Subsetting
-
-* Calls generally behave like lists.
-* Since they are list-like, you can use standard subsetting tools.
-* The first element of the call object is the function to call, which is usually a symbol:
-
-```{r}
-x[[1]]
-```
-
-```{r}
-is.symbol(x[[1]])
-```
-* The remainder of the elements are the arguments:
-
-```{r}
-is.symbol(x[-1])
-as.list(x[-1])
-```
-* We can extract individual arguments with [[ or, if named, $:
-
-```{r}
-x[[2]]
-```
-
-```{r}
-x$row.names
-```
-
-* We can determine the number of arguments in a call object by subtracting 1 from its length:
-
-```{r}
-length(x) - 1
-```
-
-* Extracting specific arguments from calls is challenging because of R’s flexible rules for argument matching:
- * It could potentially be in any location, with the full name, with an abbreviated name, or with no name.
-
-* To work around this problem, you can use `rlang::call_standardise()` which standardizes all arguments to use the full name:
-
-```{r}
-rlang::call_standardise(x)
-```
-
-* But If the function uses ... it’s not possible to standardise all arguments.
-* Calls can be modified in the same way as lists:
-
-```{r}
-x$header <- TRUE
-x
-```
-
-### Function position
-
-* The first element of the call object is the function position. This contains the function that will be called when the object is evaluated, and is usually a symbol.
-
-```{r}
-lobstr::ast(foo())
-```
-
-* While R allows you to surround the name of the function with quotes, the parser converts it to a symbol:
-
-```{r}
-lobstr::ast("foo"())
-```
-
-* However, sometimes the function doesn’t exist in the current environment and you need to do some computation to retrieve it:
- * For example, if the function is in another package, is a method of an R6 object, or is created by a function factory. In this case, the function position will be occupied by another call:
-
-
-```{r}
-lobstr::ast(pkg::foo(1))
-```
-
-```{r}
-lobstr::ast(obj$foo(1))
-```
-
-```{r}
-lobstr::ast(foo(1)(2))
-```
-
-
-
-### Constructing
-
-* You can construct a call object from its components using `rlang::call2()`.
-* The first argument is the name of the function to call (either as a string, a symbol, or another call).
-* The remaining arguments will be passed along to the call:
-
-```{r}
-call2("mean", x = expr(x), na.rm = TRUE)
-```
-
-```{r}
-call2(expr(base::mean), x = expr(x), na.rm = TRUE)
-```
-
-* Infix calls created in this way still print as usual.
-
-```{r}
-call2("<-", expr(x), 10)
-```
-
-## Parsing and grammar
-
-* **Parsing** - The process by which a computer language takes a string and constructs an expression. Parsing is governed by a set of rules known as a grammar.
-* We are going to use `lobstr::ast()` to explore some of the details of R’s grammar, and then show how you can transform back and forth between expressions and strings.
-* **Operator precedence** - Conventions used by the programming language to resolve ambiguity.
-* Infix functions introduce two sources of ambiguity.
-* The first source of ambiguity arises from infix functions: what does 1 + 2 * 3 yield? Do you get 9 (i.e., (1 + 2) * 3), or 7 (i.e., 1 + (2 * 3))? In other words, which of the two possible parse trees below does R use?
-
-
-
-* Programming languages use conventions called operator precedence to resolve this ambiguity. We can use `ast()` to see what R does:
-
-```{r}
-lobstr::ast(1 + 2 * 3)
-```
-
-* PEMDAS (or BEDMAS or BODMAS, depending on where in the world you grew up) is pretty clear on what to do. Other operator precedence isn't as clear.
-* There’s one particularly surprising case in R:
- * ! has a much lower precedence (i.e., it binds less tightly) than you might expect.
- * This allows you to write useful operations like:
-
-```{r}
-lobstr::ast(!x %in% y)
-```
-* **R has over 30 infix operators divided into 18 precedence** groups.
-* While the details are described in `?Syntax`, very few people have memorized the complete ordering.
-* If there’s any confusion, use parentheses!
-
-```{r}
-# override PEMDAS
-lobstr::ast((1 + 2) * 3)
-```
-
-### Associativity
-
-* The second source of ambiguity is introduced by repeated usage of the same infix function.
-
-```{r}
-1 + 2 + 3
-
-# What does R do first?
-(1 + 2) + 3
-
-# or
-1 + (2 + 3)
-```
-
-* In this case it doesn't matter. Other places it might, like in `ggplot2`.
-
-* In R, most operators are left-associative, i.e., the operations on the left are evaluated first:
-
-```{r}
-lobstr::ast(1 + 2 + 3)
-```
-
-* There are two exceptions to the left-associative rule:
- 1. exponentiation
- 2. assignment
-
-```{r}
-lobstr::ast(2 ^ 2 ^ 3)
-```
-
-```{r}
-lobstr::ast(x <- y <- z)
-```
-
-### Parsing and deparsing
-
-* Parsing - turning characters you've typed into an AST (i.e., from strings to expressions).
-* R usually takes care of parsing code for us.
-* But occasionally you have code stored as a string, and you want to parse it yourself.
-* You can do so using `rlang::parse_expr()`:
-
-```{r}
-x1 <- "y <- x + 10"
-x1
-is.call(x1)
-```
-
-```{r}
-x2 <- rlang::parse_expr(x1)
-x2
-is.call(x2)
-```
-
-* `parse_expr()` always returns a single expression.
-* If you have multiple expression separated by `;` or `,`, you’ll need to use `rlang::parse_exprs()` which is the plural version of `rlang::parse_expr()`. It returns a list of expressions:
-
-```{r}
-x3 <- "a <- 1; a + 1"
-```
-
-```{r}
-rlang::parse_exprs(x3)
-```
-
-* If you find yourself parsing strings into expressions often, **quasiquotation** may be a safer approach.
- * More about quasiquaotation in Chapter 19.
-* The inverse of parsing is deparsing.
-* **Deparsing** - given an expression, you want the string that would generate it.
-* Deparsing happens automatically when you print an expression.
-* You can get the string with `rlang::expr_text()`:
-* Parsing and deparsing are not symmetric.
- * Parsing creates the AST which means that we lose backticks around ordinary names, comments, and whitespace.
-
-```{r}
-cat(expr_text(expr({
- # This is a comment
- x <- `x` + 1
-})))
-```
-
-## Using the AST to solve more complicated problems
-
-* Here we focus on what we learned to perform recursion on the AST.
-* Two parts of a recursive function:
- * Recursive case: handles the nodes in the tree. Typically, you’ll do something to each child of a node, usually calling the recursive function again, and then combine the results back together again. For expressions, you’ll need to handle calls and pairlists (function arguments).
- * Base case: handles the leaves of the tree. The base cases ensure that the function eventually terminates, by solving the simplest cases directly. For expressions, you need to handle symbols and constants in the base case.
-
-
-### Two helper functions
-
-* First, we need an `epxr_type()` function to return the type of expression element as a string.
-
-```{r}
-expr_type <- function(x) {
- if (rlang::is_syntactic_literal(x)) {
- "constant"
- } else if (is.symbol(x)) {
- "symbol"
- } else if (is.call(x)) {
- "call"
- } else if (is.pairlist(x)) {
- "pairlist"
- } else {
- typeof(x)
- }
-}
-```
-
-```{r}
-expr_type(expr("a"))
-expr_type(expr(x))
-expr_type(expr(f(1, 2)))
-```
-
-* Second, we need a wrapper function to handle exceptions.
-
-```{r}
-switch_expr <- function(x, ...) {
- switch(expr_type(x),
- ...,
- stop("Don't know how to handle type ", typeof(x), call. = FALSE)
- )
-}
-```
-
-* Lastly, we can write a basic template that walks the AST using the `switch()` statement.
-
-```{r,}
-recurse_call <- function(x) {
- switch_expr(x,
- # Base cases
- symbol = ,
- constant = ,
-
- # Recursive cases
- call = ,
- pairlist =
- )
-}
-```
-
-### Specific use cases for `recurse_call()`
-
-### Example 1: Finding F and T
-
-* Using `F` and `T` in our code rather than `FALSE` and `TRUE` is bad practice.
-* Say we want to walk the AST to find times when we use `F` and `T`.
-* Start off by finding the type of `T` vs `TRUE`.
-
-```{r}
-expr_type(expr(TRUE))
-
-expr_type(expr(T))
-```
-
-* With this knowledge, we can now write the base cases of our recursive function.
-* The logic is as follows:
- * A constant is never a logical abbreviation and a symbol is an abbreviation if it is "F" or "T":
-
-```{r}
-logical_abbr_rec <- function(x) {
- switch_expr(x,
- constant = FALSE,
- symbol = as_string(x) %in% c("F", "T")
- )
-}
-```
-
-```{r}
-logical_abbr_rec(expr(TRUE))
-logical_abbr_rec(expr(T))
-```
-
-* It's best practice to write another wrapper, assuming every input you receive will be an expression.
-
-```{r}
-logical_abbr <- function(x) {
- logical_abbr_rec(enexpr(x))
-}
-
-logical_abbr(T)
-logical_abbr(FALSE)
-```
-
-#### Next step: code for the recursive cases
-
-* Here we want to do the same thing for calls and for pairlists.
-* Here's the logic: recursively apply the function to each subcomponent, and return `TRUE` if any subcomponent contains a logical abbreviation.
-* This is simplified by using the `purrr::some()` function, which iterates over a list and returns `TRUE` if the predicate function is true for any element.
-
-```{r}
-logical_abbr_rec <- function(x) {
- switch_expr(x,
- # Base cases
- constant = FALSE,
- symbol = as_string(x) %in% c("F", "T"),
- # Recursive cases
- call = ,
- # Are we sure this is the correct function to use?
- # Why not logical_abbr_rec?
- pairlist = purrr::some(x, logical_abbr_rec)
- )
-}
-
-logical_abbr(mean(x, na.rm = T))
-
-logical_abbr(function(x, na.rm = T) FALSE)
-```
-
-### Example 2: Finding all variables created by assignment
-
-* Listing all the variables is a little more complicated.
-* Figure out what assignment looks like based on the AST.
-
-```{r}
-ast(x <- 10)
-```
-
-* Now we need to decide what data structure we're going to use for the results.
- * Easiest thing will be to return a character vector.
- * We would need to use a list if we wanted to return symbols.
-
-### Dealing with the base cases
-
-```{r}
-find_assign_rec <- function(x) {
- switch_expr(x,
- constant = ,
- symbol = character()
- )
-}
-find_assign <- function(x) find_assign_rec(enexpr(x))
-
-find_assign("x")
-
-find_assign(x)
-
-```
-
-### Dealing with the recursive cases
-
-* Here is the function to flatten pairlists.
-
-```{r}
-flat_map_chr <- function(.x, .f, ...) {
- purrr::flatten_chr(purrr::map(.x, .f, ...))
-}
-
-flat_map_chr(letters[1:3], ~ rep(., sample(3, 1)))
-```
-
-* Here is the code needed to identify calls.
-
-```{r}
-find_assign_rec <- function(x) {
- switch_expr(x,
- # Base cases
- constant = ,
- symbol = character(),
-
- # Recursive cases
- pairlist = flat_map_chr(as.list(x), find_assign_rec),
- call = {
- if (is_call(x, "<-")) {
- as_string(x[[2]])
- } else {
- flat_map_chr(as.list(x), find_assign_rec)
- }
- }
- )
-}
-
-find_assign(a <- 1)
-
-find_assign({
- a <- 1
- {
- b <- 2
- }
-})
-
-```
-
-### Make the function more robust
-
-* Throw cases at it that we think might break the function.
-* Write a function to handle these cases.
-
-```{r}
-find_assign_call <- function(x) {
- if (is_call(x, "<-") && is_symbol(x[[2]])) {
- lhs <- as_string(x[[2]])
- children <- as.list(x)[-1]
- } else {
- lhs <- character()
- children <- as.list(x)
- }
-
- c(lhs, flat_map_chr(children, find_assign_rec))
-}
-
-find_assign_rec <- function(x) {
- switch_expr(x,
- # Base cases
- constant = ,
- symbol = character(),
-
- # Recursive cases
- pairlist = flat_map_chr(x, find_assign_rec),
- call = find_assign_call(x)
- )
-}
-
-find_assign(a <- b <- c <- 1)
-
-find_assign(system.time(x <- print(y <- 5)))
-
-```
-
-* This approach certainly is more complicated, but it's important to start simple and move up.
-
-## Specialised data structures
-
-* Pairlists
-* Missing arguments
-* Expression vectors
-
-### Pairlists
-
-* Pairlists are a remnant of R’s past and have been replaced by lists almost everywhere.
-* The only place you are likely to see pairlists in R is when working with calls to the function, as the formal arguments to a function are stored in a pairlist:
-
-```{r}
-f <- expr(function(x, y = 10) x + y)
-```
-
-```{r}
-args <- f[[2]]
-args
-```
-
-```{r}
-typeof(args)
-```
-* Fortunately, whenever you encounter a pairlist, you can treat it just like a regular list:
-
-```{r}
-pl <- pairlist(x = 1, y = 2)
-```
-
-```{r}
-length(pl)
-```
-
-```{r}
-pl$x
-```
-
-### Missing arguments
-
-* Empty symbols
-* To create an empty symbol, you need to use `missing_arg()` or `expr()`.
-
-```{r}
-missing_arg()
-typeof(missing_arg())
-```
-
-* Empty symbols don't print anything.
- * To check, we need to use `rlang::is_missing()`
-
-```{r}
-is_missing(missing_arg())
-```
-
-* These are usually present in function formals:
-
-```{r}
-f <- expr(function(x, y = 10) x + y)
-
-args <- f[[2]]
-
-
-is_missing(args[[1]])
-```
-
-### Expression vectors
-
-* An expression vector is just a list of expressions.
- * The only difference is that calling `eval()` on an expression evaluates each individual expression.
- * Instead, it might be more advantageous to use a list of expressions.
-
-* Expression vectors are only produced by two base functions:
- `expression()` and `parse()`:
-
-```{r}
-exp1 <- parse(text = c("
-x <- 4
-x
-"))
-exp1
-```
-
-```{r}
-exp2 <- expression(x <- 4, x)
-exp2
-```
-
-```{r}
-typeof(exp1)
-typeof(exp2)
-```
-
-
-- Like calls and pairlists, expression vectors behave like lists:
-
-```{r}
-length(exp1)
-exp1[[1]]
-```
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/2NixH3QAerQ")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/mYOUgzoRcjI")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/5RLCRFli6QI")`
-
-`r knitr::include_url("https://www.youtube.com/embed/F8df5PMNC8Y")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/tSVBlAP5DIY")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/Jc_R4yFsYeE")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/K8w28ee3CR8")`
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/XPs-TI4BYjk")`
-
-`r knitr::include_url("https://www.youtube.com/embed/8LPw_VTBsmQ")`
-
-<details>
-<summary>Meeting chat log</summary>
-```
-00:50:48 Stone: https://www.r-bloggers.com/2018/10/quasiquotation-in-r-via-bquote/
-00:58:26 iPhone: See ya next week!
-```
-</details>
diff --git a/slides/19.Rmd b/slides/19.Rmd
@@ -0,0 +1,432 @@
+---
+engine: knitr
+title: Quasiquotation
+---
+
+## Learning objectives:
+
+- What quasiquotation means
+- Why it's important
+- Learn some practical uses
+
+```{r, message=FALSE}
+library(rlang)
+library(purrr)
+```
+
+## Introduction
+
+Three pillars of *tidy* evaluation
+
+ 1. Quasiquotation
+ 2. Quosures (chapter 20)
+ 3. Data masks (Chapter 20)
+
+**Quasiquotation = quotation + unquotation**
+
+- **Quote.** Capture unevaluated expression... ("defuse")
+- **Unquote.** Evaluate selections of quoted expression! ("inject")
+- Functions that use these features are said to use Non-standard evaluation (NSE)
+- Note: related to Lisp macros, and also exists in other languages with Lisp heritage, e.g. Julia
+
+> On it's own, Quasiquotation good for programming, but combined with other tools,
+> important for data analysis.
+
+## Motivation
+
+Simple *concrete* example:
+
+`cement()` is a function that works like `paste()` but doesn't need need quotes
+
+(Think of automatically adding 'quotes' to the arguments)
+
+```{r}
+cement <- function(...) {
+ args <- ensyms(...)
+ paste(purrr::map(args, as_string), collapse = " ")
+}
+
+cement(Good, morning, Hadley)
+```
+
+What if we wanted to use variables? What is an object and what should be quoted?
+
+This is where 'unquoting' comes in!
+
+```{r}
+name <- "Bob"
+cement(Good, afternoon, !!name) # Bang-bang!
+```
+
+## Vocabulary {-}
+
+Can think of `cement()` and `paste()` as being 'mirror-images' of each other.
+
+- `paste()` - define what to quote - **Evaluates** arguments
+- `cement()` - define what to unquote - **Quotes** arguments
+
+**Quoting function** similar to, but more precise than, **Non-standard evaluation (NSE)**
+
+- Tidyverse functions - e.g., `dplyr::mutate()`, `tidyr::pivot_longer()`
+- Base functions - e.g., `library()`, `subset()`, `with()`
+
+**Quoting function** arguments cannot be evaluated outside of function:
+```{r, error = TRUE}
+cement(Good, afternoon, Cohort) # No problem
+Good # Error!
+```
+
+**Non-quoting (standard) function** arguments can be evaluated:
+```{r}
+paste("Good", "afternoon", "Cohort")
+"Good"
+```
+
+
+## Quoting
+
+**Capture expressions without evaluating them**
+
+```{r, echo = FALSE}
+data.frame(
+ t = rep(c("One", "Many"), 3),
+ Developer = c("`expr()`","`exprs()`",
+ "`quote()`", "`substitute()`",
+ "", ""),
+ User = c("`enexpr()`", "`enexprs()`",
+ "`alist()`", "`as.list(substitute(...()))`",
+ "`ensym()`", "`ensyms()`"),
+ type = c("Expression", "Expression", "R Base", "R Base", "Symbol", "Symbol")) |>
+ dplyr::group_by(type) |>
+ gt::gt() |>
+ gt::tab_row_group(label = "R Base (Quotation)", rows = type == "R Base")|>
+ gt::tab_row_group(label = "Symbol (Quasiquotation)", rows = type == "Symbol") |>
+ gt::tab_row_group(label = "Expression (Quasiquotation)", rows = type == "Expression")|>
+ gt::cols_label(t = "") |>
+ gt::tab_options(row_group.font.weight = "bold") |>
+ gt::tab_style(style = gt::cell_text(align = "center", weight = "bold"),
+ locations = gt::cells_column_labels()) |>
+ gt::tab_style(style = gt::cell_borders(style = "hidden"), locations = gt::cells_body()) |>
+ gt::tab_style(style = gt::cell_borders(sides = "top", style = "solid"),
+ locations = gt::cells_body(rows = c(1, 3, 5))) |>
+ gt::tab_style(style = gt::cell_borders(sides = "bottom", style = "solid"),
+ locations = gt::cells_body(rows = c(2, 4))) |>
+ gt::cols_align("center", columns = -1) |>
+ gt::fmt_markdown() |>
+ gt::cols_width(t ~ px(100))
+```
+
+- Non-base functions are from **rlang**
+- **Developer** - From you, direct, fixed, interactive
+- **User** - From the user, indirect, varying, programmatic
+
+Also:
+
+- `bquote()` provides a limited form of quasiquotation
+- `~`, the formula, is a quoting function (see [Section 20.3.4](https://adv-r.hadley.nz/evaluation.html#quosure-impl))
+
+### `expr()` and `exprs()` {-}
+```{r}
+expr(x + y)
+exprs(exp1 = x + y, exp2 = x * y)
+```
+
+### `enexpr()`^[`enexpr()` = **en**rich `expr()`] and `enexprs()` {-}
+```{r}
+f <- function(x) enexpr(x)
+f(a + b + c)
+
+f2 <- function(x, y) enexprs(exp1 = x, exp2 = y)
+f2(x = a + b, y = c + d)
+```
+
+### `ensym()` and `ensyms()` {-}
+
+- **[Remember](https://adv-r.hadley.nz/expressions.html#symbols):** Symbol represents the name of an object. Can only be length 1.
+- These are stricter than `enexpr/s()`
+
+```{r}
+f <- function(x) ensym(x)
+f(a)
+
+f2 <- function(x, y) ensyms(sym1 = x, sym2 = y)
+f2(x = a, y = "b")
+```
+
+
+## Unquoting
+
+**Selectively evaluate parts of an expression**
+
+- Merges ASTs with template
+- 1 argument `!!` (**unquote**, **bang-bang**)
+ - Unquoting a *function call* evaluates and returns results
+ - Unquoting a *function (name)* replaces the function (alternatively use `call2()`)
+- \>1 arguments `!!!` (**unquote-splice**, **bang-bang-bang**, **triple bang**)
+- `!!` and `!!!` only work like this inside quoting function using rlang
+
+### Basic unquoting {-}
+
+**One argument**
+```{r}
+x <- expr(a + b)
+y <- expr(c / d)
+```
+
+```{r, collapse = TRUE}
+expr(f(x, y)) # No unquoting
+expr(f(!!x, !!y)) # Unquoting
+```
+
+**Multiple arguments**
+```{r}
+z <- exprs(a + b, c + d)
+w <- exprs(exp1 = a + b, exp2 = c + d)
+```
+
+```{r, collapse = TRUE}
+expr(f(z)) # No unquoting
+expr(f(!!!z)) # Unquoting
+expr(f(!!!w)) # Unquoting when named
+```
+
+
+### Special usages or cases {-}
+
+For example, get the AST of an expression
+```{r, collapse = TRUE}
+lobstr::ast(x)
+lobstr::ast(!!x)
+```
+
+
+Unquote *function call*
+```{r, collapse = TRUE}
+expr(f(!!mean(c(100, 200, 300)), y))
+```
+
+Unquote *function*
+```{r, collapse = TRUE}
+f <- expr(sd)
+expr((!!f)(x))
+expr((!!f)(!!x + !!y))
+```
+
+## Non-quoting
+
+Only `bquote()` provides a limited form of quasiquotation.
+
+The rest of base selectively uses or does not use quoting (rather than unquoting).
+
+Four basic forms of quoting/non-quoting:
+
+1. **Pair of functions** - Quoting and non-quoting
+ - e.g., `$` (quoting) and `[[` (non-quoting)
+2. **Pair of Arguments** - Quoting and non-quoting
+ - e.g., `rm(...)` (quoting) and `rm(list = c(...))` (non-quoting)
+3. **Arg to control quoting**
+ - e.g., `library(rlang)` (quoting) and `library(pkg, character.only = TRUE)` (where `pkg <- "rlang"`)
+4. **Quote if evaluation fails**
+ - `help(var)` - Quote, show help for var
+ - `help(var)` (where `var <- "mean"`) - No quote, show help for mean
+ - `help(var)` (where `var <- 10`) - Quote fails, show help for var
+
+
+## ... (dot-dot-dot) [When using ... with quoting]
+
+- Sometimes need to supply an *arbitrary* list of expressions or arguments in a function (`...`)
+- But need a way to use these when we don't necessarily have the names
+- Remember `!!` and `!!!` only work with functions that use rlang
+- Can use `list2(...)` to turn `...` into "tidy dots" which *can* be unquoted and spliced
+- Require `list2()` if going to be passing or using `!!` or `!!!` in `...`
+- `list2()` is a wrapper around `dots_list()` with the most common defaults
+
+**No need for `list2()`**
+```{r, collapse = TRUE}
+d <- function(...) data.frame(list(...))
+d(x = c(1:3), y = c(2, 4, 6))
+```
+
+**Require `list2()`**
+```{r, collapse = TRUE, error = TRUE}
+vars <- list(x = c(1:3), y = c(2, 4, 6))
+d(!!!vars)
+d2 <- function(...) data.frame(list2(...))
+d2(!!!vars)
+# Same result but x and y evaluated later
+vars_expr <- exprs(x = c(1:3), y = c(2, 4, 6))
+d2(!!!vars_expr)
+```
+
+Getting argument names (symbols) from variables
+```{r}
+nm <- "z"
+val <- letters[1:4]
+d2(x = 1:4, !!nm := val)
+```
+
+## `exec()` [Making your own ...] {-}
+
+What if your function doesn't have tidy dots?
+
+
+Can't use `!!` or `:=` if doesn't support rlang or dynamic dots
+```{r, collapse=TRUE, error = TRUE}
+my_mean <- function(x, arg_name, arg_val) {
+ mean(x, !!arg_name := arg_val)
+}
+
+my_mean(c(NA, 1:10), arg_name = "na.rm", arg_val = TRUE)
+```
+
+Let's use the ... from `exec()`
+```{r, eval = FALSE}
+exec(.fn, ..., .env = caller_env())
+```
+
+
+```{r, collapse=TRUE}
+my_mean <- function(x, arg_name, arg_val) {
+ exec("mean", x, !!arg_name := arg_val)
+}
+
+my_mean(c(NA, 1:10), arg_name = "na.rm", arg_val = TRUE)
+```
+
+Note that you do not unquote `arg_val`.
+
+Also `exec` is useful for mapping over a list of functions:
+
+```{r}
+x <- c(runif(10), NA)
+funs <- c("mean", "median", "sd")
+purrr::map_dbl(funs, exec, x, na.rm = TRUE)
+```
+
+
+## Base R `do.call` {-}
+
+`do.call(what, args)`
+
+- `what` is a function to call
+- `args` is a list of arguments to pass to the function.
+
+```{r, collapse = TRUE}
+nrow(mtcars)
+mtcars3 <- do.call("rbind", list(mtcars, mtcars, mtcars))
+nrow(mtcars3)
+```
+
+
+### Exercise 19.5.5 #1 {-}
+
+One way to implement `exec` is shown here: Describe how it works. What are the key ideas?
+
+```{r}
+exec_ <- function(f, ..., .env = caller_env()){
+ args <- list2(...)
+ do.call(f, args, envir = .env)
+}
+```
+
+## Case Studies (side note)
+
+Sometimes you want to run a bunch of models, without having to copy/paste each one.
+
+BUT, you also want the summary function to show the appropriate model call,
+not one with hidden variables (e.g., `lm(y ~ x, data = data)`).
+
+We can achieve this by building expressions and unquoting as needed:
+
+```{r, collapse = TRUE}
+library(purrr)
+
+vars <- data.frame(x = c("hp", "hp"),
+ y = c("mpg", "cyl"))
+
+x_sym <- syms(vars$x)
+y_sym <- syms(vars$y)
+
+formulae <- map2(x_sym, y_sym, \(x, y) expr(!!y ~ !!x))
+formulae
+models <- map(formulae, \(f) expr(lm(!!f, data = mtcars)))
+summary(eval(models[[1]]))
+```
+
+As a function:
+```{r, collapse = TRUE}
+lm_df <- function(df, data) {
+ x_sym <- map(df$x, as.symbol)
+ y_sym <- map(df$y, as.symbol)
+ data <- enexpr(data)
+
+ formulae <- map2(x_sym, y_sym, \(x, y) expr(!!y ~ !!x))
+ models <- map(formulae, \(f) expr(lm(!!f, !!data)))
+
+ map(models, \(m) summary(eval(m)))
+}
+
+vars <- data.frame(x = c("hp", "hp"),
+ y = c("mpg", "cyl"))
+lm_df(vars, data = mtcars)
+```
+
+
+
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/tbByqsRRvdE")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/IXE21pR8EJ0")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/gxSpz6IePLg")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/aniKrZrr4aU")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/klcpEb5ZBSM")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/OBodjc80y-E")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+01:02:07 Trevin: Yeah, that was a great workshop
+01:02:18 Trevin: Glad they posted the resources online
+01:06:39 Trevin: Thank you!
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/8LPw_VTBsmQ")`
+
+<details>
+<summary>Meeting chat log</summary>
+```
+00:50:48 Stone: https://www.r-bloggers.com/2018/10/quasiquotation-in-r-via-bquote/
+00:58:26 iPhone: See ya next week!
+```
+</details>
+
+`r knitr::include_url("https://www.youtube.com/embed/g77Jfl_xrXM")`
+
+<details>
+<summary>Meeting chat log</summary>
+```
+00:55:22 collinberke: https://rlang.r-lib.org/reference/embrace-operator.html?q=enquo#under-the-hood
+```
+</details>
diff --git a/slides/19_Quasiquotation.Rmd b/slides/19_Quasiquotation.Rmd
@@ -1,429 +0,0 @@
-# Quasiquotation
-
-**Learning objectives:**
-
-- What quasiquotation means
-- Why it's important
-- Learn some practical uses
-
-```{r, message=FALSE}
-library(rlang)
-library(purrr)
-```
-
-## Introduction
-
-Three pillars of *tidy* evaluation
-
- 1. Quasiquotation
- 2. Quosures (chapter 20)
- 3. Data masks (Chapter 20)
-
-**Quasiquotation = quotation + unquotation**
-
-- **Quote.** Capture unevaluated expression... ("defuse")
-- **Unquote.** Evaluate selections of quoted expression! ("inject")
-- Functions that use these features are said to use Non-standard evaluation (NSE)
-- Note: related to Lisp macros, and also exists in other languages with Lisp heritage, e.g. Julia
-
-> On it's own, Quasiquotation good for programming, but combined with other tools,
-> important for data analysis.
-
-## Motivation
-
-Simple *concrete* example:
-
-`cement()` is a function that works like `paste()` but doesn't need need quotes
-
-(Think of automatically adding 'quotes' to the arguments)
-
-```{r}
-cement <- function(...) {
- args <- ensyms(...)
- paste(purrr::map(args, as_string), collapse = " ")
-}
-
-cement(Good, morning, Hadley)
-```
-
-What if we wanted to use variables? What is an object and what should be quoted?
-
-This is where 'unquoting' comes in!
-
-```{r}
-name <- "Bob"
-cement(Good, afternoon, !!name) # Bang-bang!
-```
-
-## Vocabulary {-}
-
-Can think of `cement()` and `paste()` as being 'mirror-images' of each other.
-
-- `paste()` - define what to quote - **Evaluates** arguments
-- `cement()` - define what to unquote - **Quotes** arguments
-
-**Quoting function** similar to, but more precise than, **Non-standard evaluation (NSE)**
-
-- Tidyverse functions - e.g., `dplyr::mutate()`, `tidyr::pivot_longer()`
-- Base functions - e.g., `library()`, `subset()`, `with()`
-
-**Quoting function** arguments cannot be evaluated outside of function:
-```{r, error = TRUE}
-cement(Good, afternoon, Cohort) # No problem
-Good # Error!
-```
-
-**Non-quoting (standard) function** arguments can be evaluated:
-```{r}
-paste("Good", "afternoon", "Cohort")
-"Good"
-```
-
-
-## Quoting
-
-**Capture expressions without evaluating them**
-
-```{r, echo = FALSE}
-data.frame(
- t = rep(c("One", "Many"), 3),
- Developer = c("`expr()`","`exprs()`",
- "`quote()`", "`substitute()`",
- "", ""),
- User = c("`enexpr()`", "`enexprs()`",
- "`alist()`", "`as.list(substitute(...()))`",
- "`ensym()`", "`ensyms()`"),
- type = c("Expression", "Expression", "R Base", "R Base", "Symbol", "Symbol")) |>
- dplyr::group_by(type) |>
- gt::gt() |>
- gt::tab_row_group(label = "R Base (Quotation)", rows = type == "R Base")|>
- gt::tab_row_group(label = "Symbol (Quasiquotation)", rows = type == "Symbol") |>
- gt::tab_row_group(label = "Expression (Quasiquotation)", rows = type == "Expression")|>
- gt::cols_label(t = "") |>
- gt::tab_options(row_group.font.weight = "bold") |>
- gt::tab_style(style = gt::cell_text(align = "center", weight = "bold"),
- locations = gt::cells_column_labels()) |>
- gt::tab_style(style = gt::cell_borders(style = "hidden"), locations = gt::cells_body()) |>
- gt::tab_style(style = gt::cell_borders(sides = "top", style = "solid"),
- locations = gt::cells_body(rows = c(1, 3, 5))) |>
- gt::tab_style(style = gt::cell_borders(sides = "bottom", style = "solid"),
- locations = gt::cells_body(rows = c(2, 4))) |>
- gt::cols_align("center", columns = -1) |>
- gt::fmt_markdown() |>
- gt::cols_width(t ~ px(100))
-```
-
-- Non-base functions are from **rlang**
-- **Developer** - From you, direct, fixed, interactive
-- **User** - From the user, indirect, varying, programmatic
-
-Also:
-
-- `bquote()` provides a limited form of quasiquotation
-- `~`, the formula, is a quoting function (see [Section 20.3.4](https://adv-r.hadley.nz/evaluation.html#quosure-impl))
-
-### `expr()` and `exprs()` {-}
-```{r}
-expr(x + y)
-exprs(exp1 = x + y, exp2 = x * y)
-```
-
-### `enexpr()`^[`enexpr()` = **en**rich `expr()`] and `enexprs()` {-}
-```{r}
-f <- function(x) enexpr(x)
-f(a + b + c)
-
-f2 <- function(x, y) enexprs(exp1 = x, exp2 = y)
-f2(x = a + b, y = c + d)
-```
-
-### `ensym()` and `ensyms()` {-}
-
-- **[Remember](https://adv-r.hadley.nz/expressions.html#symbols):** Symbol represents the name of an object. Can only be length 1.
-- These are stricter than `enexpr/s()`
-
-```{r}
-f <- function(x) ensym(x)
-f(a)
-
-f2 <- function(x, y) ensyms(sym1 = x, sym2 = y)
-f2(x = a, y = "b")
-```
-
-
-## Unquoting
-
-**Selectively evaluate parts of an expression**
-
-- Merges ASTs with template
-- 1 argument `!!` (**unquote**, **bang-bang**)
- - Unquoting a *function call* evaluates and returns results
- - Unquoting a *function (name)* replaces the function (alternatively use `call2()`)
-- \>1 arguments `!!!` (**unquote-splice**, **bang-bang-bang**, **triple bang**)
-- `!!` and `!!!` only work like this inside quoting function using rlang
-
-### Basic unquoting {-}
-
-**One argument**
-```{r}
-x <- expr(a + b)
-y <- expr(c / d)
-```
-
-```{r, collapse = TRUE}
-expr(f(x, y)) # No unquoting
-expr(f(!!x, !!y)) # Unquoting
-```
-
-**Multiple arguments**
-```{r}
-z <- exprs(a + b, c + d)
-w <- exprs(exp1 = a + b, exp2 = c + d)
-```
-
-```{r, collapse = TRUE}
-expr(f(z)) # No unquoting
-expr(f(!!!z)) # Unquoting
-expr(f(!!!w)) # Unquoting when named
-```
-
-
-### Special usages or cases {-}
-
-For example, get the AST of an expression
-```{r, collapse = TRUE}
-lobstr::ast(x)
-lobstr::ast(!!x)
-```
-
-
-Unquote *function call*
-```{r, collapse = TRUE}
-expr(f(!!mean(c(100, 200, 300)), y))
-```
-
-Unquote *function*
-```{r, collapse = TRUE}
-f <- expr(sd)
-expr((!!f)(x))
-expr((!!f)(!!x + !!y))
-```
-
-## Non-quoting
-
-Only `bquote()` provides a limited form of quasiquotation.
-
-The rest of base selectively uses or does not use quoting (rather than unquoting).
-
-Four basic forms of quoting/non-quoting:
-
-1. **Pair of functions** - Quoting and non-quoting
- - e.g., `$` (quoting) and `[[` (non-quoting)
-2. **Pair of Arguments** - Quoting and non-quoting
- - e.g., `rm(...)` (quoting) and `rm(list = c(...))` (non-quoting)
-3. **Arg to control quoting**
- - e.g., `library(rlang)` (quoting) and `library(pkg, character.only = TRUE)` (where `pkg <- "rlang"`)
-4. **Quote if evaluation fails**
- - `help(var)` - Quote, show help for var
- - `help(var)` (where `var <- "mean"`) - No quote, show help for mean
- - `help(var)` (where `var <- 10`) - Quote fails, show help for var
-
-
-## ... (dot-dot-dot) [When using ... with quoting]
-
-- Sometimes need to supply an *arbitrary* list of expressions or arguments in a function (`...`)
-- But need a way to use these when we don't necessarily have the names
-- Remember `!!` and `!!!` only work with functions that use rlang
-- Can use `list2(...)` to turn `...` into "tidy dots" which *can* be unquoted and spliced
-- Require `list2()` if going to be passing or using `!!` or `!!!` in `...`
-- `list2()` is a wrapper around `dots_list()` with the most common defaults
-
-**No need for `list2()`**
-```{r, collapse = TRUE}
-d <- function(...) data.frame(list(...))
-d(x = c(1:3), y = c(2, 4, 6))
-```
-
-**Require `list2()`**
-```{r, collapse = TRUE, error = TRUE}
-vars <- list(x = c(1:3), y = c(2, 4, 6))
-d(!!!vars)
-d2 <- function(...) data.frame(list2(...))
-d2(!!!vars)
-# Same result but x and y evaluated later
-vars_expr <- exprs(x = c(1:3), y = c(2, 4, 6))
-d2(!!!vars_expr)
-```
-
-Getting argument names (symbols) from variables
-```{r}
-nm <- "z"
-val <- letters[1:4]
-d2(x = 1:4, !!nm := val)
-```
-
-## `exec()` [Making your own ...] {-}
-
-What if your function doesn't have tidy dots?
-
-
-Can't use `!!` or `:=` if doesn't support rlang or dynamic dots
-```{r, collapse=TRUE, error = TRUE}
-my_mean <- function(x, arg_name, arg_val) {
- mean(x, !!arg_name := arg_val)
-}
-
-my_mean(c(NA, 1:10), arg_name = "na.rm", arg_val = TRUE)
-```
-
-Let's use the ... from `exec()`
-```{r, eval = FALSE}
-exec(.fn, ..., .env = caller_env())
-```
-
-
-```{r, collapse=TRUE}
-my_mean <- function(x, arg_name, arg_val) {
- exec("mean", x, !!arg_name := arg_val)
-}
-
-my_mean(c(NA, 1:10), arg_name = "na.rm", arg_val = TRUE)
-```
-
-Note that you do not unquote `arg_val`.
-
-Also `exec` is useful for mapping over a list of functions:
-
-```{r}
-x <- c(runif(10), NA)
-funs <- c("mean", "median", "sd")
-purrr::map_dbl(funs, exec, x, na.rm = TRUE)
-```
-
-
-## Base R `do.call` {-}
-
-`do.call(what, args)`
-
-- `what` is a function to call
-- `args` is a list of arguments to pass to the function.
-
-```{r, collapse = TRUE}
-nrow(mtcars)
-mtcars3 <- do.call("rbind", list(mtcars, mtcars, mtcars))
-nrow(mtcars3)
-```
-
-
-### Exercise 19.5.5 #1 {-}
-
-One way to implement `exec` is shown here: Describe how it works. What are the key ideas?
-
-```{r}
-exec_ <- function(f, ..., .env = caller_env()){
- args <- list2(...)
- do.call(f, args, envir = .env)
-}
-```
-
-## Case Studies (side note)
-
-Sometimes you want to run a bunch of models, without having to copy/paste each one.
-
-BUT, you also want the summary function to show the appropriate model call,
-not one with hidden variables (e.g., `lm(y ~ x, data = data)`).
-
-We can achieve this by building expressions and unquoting as needed:
-
-```{r, collapse = TRUE}
-library(purrr)
-
-vars <- data.frame(x = c("hp", "hp"),
- y = c("mpg", "cyl"))
-
-x_sym <- syms(vars$x)
-y_sym <- syms(vars$y)
-
-formulae <- map2(x_sym, y_sym, \(x, y) expr(!!y ~ !!x))
-formulae
-models <- map(formulae, \(f) expr(lm(!!f, data = mtcars)))
-summary(eval(models[[1]]))
-```
-
-As a function:
-```{r, collapse = TRUE}
-lm_df <- function(df, data) {
- x_sym <- map(df$x, as.symbol)
- y_sym <- map(df$y, as.symbol)
- data <- enexpr(data)
-
- formulae <- map2(x_sym, y_sym, \(x, y) expr(!!y ~ !!x))
- models <- map(formulae, \(f) expr(lm(!!f, !!data)))
-
- map(models, \(m) summary(eval(m)))
-}
-
-vars <- data.frame(x = c("hp", "hp"),
- y = c("mpg", "cyl"))
-lm_df(vars, data = mtcars)
-```
-
-
-
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/tbByqsRRvdE")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/IXE21pR8EJ0")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/gxSpz6IePLg")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/aniKrZrr4aU")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/klcpEb5ZBSM")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/OBodjc80y-E")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-01:02:07 Trevin: Yeah, that was a great workshop
-01:02:18 Trevin: Glad they posted the resources online
-01:06:39 Trevin: Thank you!
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/8LPw_VTBsmQ")`
-
-<details>
-<summary>Meeting chat log</summary>
-```
-00:50:48 Stone: https://www.r-bloggers.com/2018/10/quasiquotation-in-r-via-bquote/
-00:58:26 iPhone: See ya next week!
-```
-</details>
-
-`r knitr::include_url("https://www.youtube.com/embed/g77Jfl_xrXM")`
-
-<details>
-<summary>Meeting chat log</summary>
-```
-00:55:22 collinberke: https://rlang.r-lib.org/reference/embrace-operator.html?q=enquo#under-the-hood
-```
-</details>
diff --git a/slides/20.Rmd b/slides/20.Rmd
@@ -0,0 +1,418 @@
+---
+engine: knitr
+title: Evaluation
+---
+
+## Learning objectives:
+
+- Learn evaluation basics
+- Learn about **quosures** and **data mask**
+- Understand tidy evaluation
+
+```{r message=FALSE,warning=FALSE}
+library(rlang)
+library(purrr)
+```
+
+## A bit of a recap
+
+- Metaprogramming: To separate our description of the action from the action itself - Separate the code from its evaluation.
+- Quasiquotation: combine code written by the *function's author* with code written by the *function's user*.
+ - Unquotation: it gives the *user* the ability to evaluate parts of a quoted argument.
+ - Evaluation: it gives the *developer* the ability to evluated quoted expression in custom environments.
+
+**Tidy evaluation**: quasiquotation, quosures and data masks
+
+## Evaluation basics
+
+We use `eval()` to evaluate, run, or execute expressions. It requires two arguments:
+
+- `expr`: the object to evaluate, either an expression or a symbol.
+- `env`: the environment in which to evaluate the expression or where to look for the values.
+Defaults to current env.
+
+```{r}
+sumexpr <- expr(x + y)
+x <- 10
+y <- 40
+eval(sumexpr)
+```
+
+```{r}
+eval(sumexpr, envir = env(x = 1000, y = 10))
+```
+
+
+## Application: reimplementing `source()`
+
+What do we need?
+
+- Read the file being sourced.
+- Parse its expressions (quote them?)
+- Evaluate each expression saving the results
+- Return the results
+
+```{r}
+source2 <- function(path, env = caller_env()) {
+ file <- paste(readLines(path, warn = FALSE), collapse = "\n")
+ exprs <- parse_exprs(file)
+
+ res <- NULL
+ for (i in seq_along(exprs)) {
+ res <- eval(exprs[[i]], env)
+ }
+
+ invisible(res)
+}
+```
+
+The real source is much more complex.
+
+## Quosures
+
+**quosures** are a data structure from `rlang` containing both and expression and an environment
+
+*Quoting* + *closure* because it quotes the expression and encloses the environment.
+
+Three ways to create them:
+
+- Used mostly for learning: `new_quosure()`, creates a quosure from its components.
+
+```{r}
+q1 <- rlang::new_quosure(expr(x + y),
+ env(x = 1, y = 10))
+```
+
+With a quosure, we can use `eval_tidy()` directly.
+
+```{r}
+rlang::eval_tidy(q1)
+```
+
+And get its components
+
+```{r}
+rlang::get_expr(q1)
+rlang::get_env(q1)
+```
+
+Or set them
+
+```{r}
+q1 <- set_env(q1, env(x = 3, y = 4))
+eval_tidy(q1)
+```
+
+
+- Used in the real world: `enquo()` o `enquos()`, to capture user supplied expressions. They take the environment from where they're created.
+
+```{r}
+foo <- function(x) enquo(x)
+quo_foo <- foo(a + b)
+```
+
+```{r}
+get_expr(quo_foo)
+get_env(quo_foo)
+```
+
+- Almost never used: `quo()` and `quos()`, to match to `expr()` and `exprs()`.
+
+## Quosures and `...`
+
+Quosures are just a convenience, but they are essential when it comes to working with `...`, because you can have each argument from `...` associated with a different environment.
+
+```{r}
+g <- function(...) {
+ ## Creating our quosures from ...
+ enquos(...)
+}
+
+createQuos <- function(...) {
+ ## symbol from the function environment
+ x <- 1
+ g(..., f = x)
+}
+```
+
+```{r}
+## symbol from the global environment
+x <- 0
+qs <- createQuos(global = x)
+qs
+```
+
+## Other facts about quosures
+
+Formulas were the inspiration for closures because they also capture an expression and an environment
+
+```{r}
+f <- ~runif(3)
+str(f)
+```
+
+There was an early version of tidy evaluation with formulas, but there's no easy way to implement quasiquotation with them.
+
+They are actually call objects
+
+```{r}
+q4 <- new_quosure(expr(x + y + z))
+class(q4)
+is.call(q4)
+```
+
+with an attribute to store the environment
+
+```{r}
+attr(q4, ".Environment")
+```
+
+
+**Nested quosures**
+
+With quosiquotation we can embed quosures in expressions.
+
+```{r}
+q2 <- new_quosure(expr(x), env(x = 1))
+q3 <- new_quosure(expr(x), env(x = 100))
+
+nq <- expr(!!q2 + !!q3)
+```
+
+And evaluate them
+
+```{r}
+eval_tidy(nq)
+```
+
+But for printing it's better to use `expr_print(x)`
+
+```{r}
+expr_print(nq)
+nq
+```
+
+## Data mask
+
+A data frame where the evaluated code will look first for its variable definitions.
+
+Used in packages like dplyr and ggplot.
+
+To use it we need to supply the data mask as a second argument to `eval_tidy()`
+
+```{r}
+q1 <- new_quosure(expr(x * y), env(x = 100))
+df <- data.frame(y = 1:10)
+
+eval_tidy(q1, df)
+```
+
+Everything together, in one function.
+
+```{r}
+with2 <- function(data, expr) {
+ expr <- enquo(expr)
+ eval_tidy(expr, data)
+}
+```
+
+But we need to create the objects that are not part of our data mask
+```{r}
+x <- 100
+with2(df, x * y)
+```
+
+Also doable with `base::eval()` instead of `rlang::eval_tidy()` but we have to use `base::substitute()` instead of `enquo()` (like we did for `enexpr()`) and we need to specify the environment.
+
+```{r}
+with3 <- function(data, expr) {
+ expr <- substitute(expr)
+ eval(expr, data, caller_env())
+}
+```
+
+```{r}
+with3(df, x*y)
+```
+
+## Pronouns: .data$ and .env$
+
+**Ambiguity!!**
+
+An object value can come from the env or from the data mask
+
+```{r}
+q1 <- new_quosure(expr(x * y + x), env = env(x = 1))
+df <- data.frame(y = 1:5,
+ x = 10)
+
+eval_tidy(q1, df)
+```
+
+We use pronouns:
+
+- `.data$x`: `x` from the data mask
+- `.env$x`: `x` from the environment
+
+
+```{r}
+q1 <- new_quosure(expr(.data$x * y + .env$x), env = env(x = 1))
+eval_tidy(q1, df)
+```
+
+## Application: reimplementing `base::subset()`
+
+`base::subset()` works like `dplyr::filter()`: it selects rows of a data frame given an expression.
+
+What do we need?
+
+- Quote the expression to filter
+- Figure out which rows in the data frame pass the filter
+- Subset the data frame
+
+```{r}
+subset2 <- function(data, rows) {
+ rows <- enquo(rows)
+ rows_val <- eval_tidy(rows, data)
+ stopifnot(is.logical(rows_val))
+
+ data[rows_val, , drop = FALSE]
+}
+```
+
+```{r}
+sample_df <- data.frame(a = 1:5, b = 5:1, c = c(5, 3, 2, 4, 1))
+
+# Shorthand for sample_df[sample_df$b == sample_df$c, ]
+subset2(sample_df, b == c)
+```
+
+## Using tidy evaluation
+
+Most of the time we might not call it directly, but call a function that uses `eval_tidy()` (becoming developer AND user)
+
+**Use case**: resample and subset
+
+We have a function that resamples a dataset:
+
+```{r}
+resample <- function(df, n) {
+ idx <- sample(nrow(df), n, replace = TRUE)
+ df[idx, , drop = FALSE]
+}
+```
+
+```{r}
+resample(sample_df, 10)
+```
+
+But we also want to use subset and we want to create a function that allow us to resample and subset (with `subset2()`) in a single step.
+
+First attempt:
+
+```{r}
+subsample <- function(df, cond, n = nrow(df)) {
+ df <- subset2(df, cond)
+ resample(df, n)
+}
+```
+
+```{r error=TRUE}
+subsample(sample_df, b == c, 10)
+```
+
+What happened?
+
+`subsample()` doesn't quote any arguments and `cond` is evaluated normally
+
+So we have to quote `cond` and unquote it when we pass it to `subset2()`
+
+```{r}
+subsample <- function(df, cond, n = nrow(df)) {
+ cond <- enquo(cond)
+
+ df <- subset2(df, !!cond)
+ resample(df, n)
+}
+```
+
+```{r}
+subsample(sample_df, b == c, 10)
+```
+
+**Be careful!**, potential ambiguity:
+
+```{r}
+threshold_x <- function(df, val) {
+ subset2(df, x >= val)
+}
+```
+
+What would happen if `x` exists in the calling environment but doesn't exist in `df`? Or if `val` also exists in `df`?
+
+So, as developers of `threshold_x()` and users of `subset2()`, we have to add some pronouns:
+
+```{r}
+threshold_x <- function(df, val) {
+ subset2(df, .data$x >= .env$val)
+}
+```
+
+
+Just remember:
+
+> As a general rule of thumb, as a function author it’s your responsibility
+> to avoid ambiguity with any expressions that you create;
+> it’s the user’s responsibility to avoid ambiguity in expressions that they create.
+
+
+## Base evaluation
+
+Check 20.6 in the book!
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/4En_Ypvtjqw")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/ewHAlVwCGtY")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/0K1vyiV8_qo")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/kfwjJDuyN8U")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/WzfD9GK6nCI")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/8FT2BA18Ghg")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+01:00:42 Trevin: They just want to help you present that’s all
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/g77Jfl_xrXM")`
+
+<details>
+<summary>Meeting chat log</summary>
+```
+00:55:22 collinberke: https://rlang.r-lib.org/reference/embrace-operator.html?q=enquo#under-the-hood
+```
+</details>
+
+`r knitr::include_url("https://www.youtube.com/embed/wPLrafScijE")`
diff --git a/slides/20_Evaluation.Rmd b/slides/20_Evaluation.Rmd
@@ -1,415 +0,0 @@
-# Evaluation
-
-**Learning objectives:**
-
-- Learn evaluation basics
-- Learn about **quosures** and **data mask**
-- Understand tidy evaluation
-
-```{r message=FALSE,warning=FALSE}
-library(rlang)
-library(purrr)
-```
-
-## A bit of a recap
-
-- Metaprogramming: To separate our description of the action from the action itself - Separate the code from its evaluation.
-- Quasiquotation: combine code written by the *function's author* with code written by the *function's user*.
- - Unquotation: it gives the *user* the ability to evaluate parts of a quoted argument.
- - Evaluation: it gives the *developer* the ability to evluated quoted expression in custom environments.
-
-**Tidy evaluation**: quasiquotation, quosures and data masks
-
-## Evaluation basics
-
-We use `eval()` to evaluate, run, or execute expressions. It requires two arguments:
-
-- `expr`: the object to evaluate, either an expression or a symbol.
-- `env`: the environment in which to evaluate the expression or where to look for the values.
-Defaults to current env.
-
-```{r}
-sumexpr <- expr(x + y)
-x <- 10
-y <- 40
-eval(sumexpr)
-```
-
-```{r}
-eval(sumexpr, envir = env(x = 1000, y = 10))
-```
-
-
-## Application: reimplementing `source()`
-
-What do we need?
-
-- Read the file being sourced.
-- Parse its expressions (quote them?)
-- Evaluate each expression saving the results
-- Return the results
-
-```{r}
-source2 <- function(path, env = caller_env()) {
- file <- paste(readLines(path, warn = FALSE), collapse = "\n")
- exprs <- parse_exprs(file)
-
- res <- NULL
- for (i in seq_along(exprs)) {
- res <- eval(exprs[[i]], env)
- }
-
- invisible(res)
-}
-```
-
-The real source is much more complex.
-
-## Quosures
-
-**quosures** are a data structure from `rlang` containing both and expression and an environment
-
-*Quoting* + *closure* because it quotes the expression and encloses the environment.
-
-Three ways to create them:
-
-- Used mostly for learning: `new_quosure()`, creates a quosure from its components.
-
-```{r}
-q1 <- rlang::new_quosure(expr(x + y),
- env(x = 1, y = 10))
-```
-
-With a quosure, we can use `eval_tidy()` directly.
-
-```{r}
-rlang::eval_tidy(q1)
-```
-
-And get its components
-
-```{r}
-rlang::get_expr(q1)
-rlang::get_env(q1)
-```
-
-Or set them
-
-```{r}
-q1 <- set_env(q1, env(x = 3, y = 4))
-eval_tidy(q1)
-```
-
-
-- Used in the real world: `enquo()` o `enquos()`, to capture user supplied expressions. They take the environment from where they're created.
-
-```{r}
-foo <- function(x) enquo(x)
-quo_foo <- foo(a + b)
-```
-
-```{r}
-get_expr(quo_foo)
-get_env(quo_foo)
-```
-
-- Almost never used: `quo()` and `quos()`, to match to `expr()` and `exprs()`.
-
-## Quosures and `...`
-
-Quosures are just a convenience, but they are essential when it comes to working with `...`, because you can have each argument from `...` associated with a different environment.
-
-```{r}
-g <- function(...) {
- ## Creating our quosures from ...
- enquos(...)
-}
-
-createQuos <- function(...) {
- ## symbol from the function environment
- x <- 1
- g(..., f = x)
-}
-```
-
-```{r}
-## symbol from the global environment
-x <- 0
-qs <- createQuos(global = x)
-qs
-```
-
-## Other facts about quosures
-
-Formulas were the inspiration for closures because they also capture an expression and an environment
-
-```{r}
-f <- ~runif(3)
-str(f)
-```
-
-There was an early version of tidy evaluation with formulas, but there's no easy way to implement quasiquotation with them.
-
-They are actually call objects
-
-```{r}
-q4 <- new_quosure(expr(x + y + z))
-class(q4)
-is.call(q4)
-```
-
-with an attribute to store the environment
-
-```{r}
-attr(q4, ".Environment")
-```
-
-
-**Nested quosures**
-
-With quosiquotation we can embed quosures in expressions.
-
-```{r}
-q2 <- new_quosure(expr(x), env(x = 1))
-q3 <- new_quosure(expr(x), env(x = 100))
-
-nq <- expr(!!q2 + !!q3)
-```
-
-And evaluate them
-
-```{r}
-eval_tidy(nq)
-```
-
-But for printing it's better to use `expr_print(x)`
-
-```{r}
-expr_print(nq)
-nq
-```
-
-## Data mask
-
-A data frame where the evaluated code will look first for its variable definitions.
-
-Used in packages like dplyr and ggplot.
-
-To use it we need to supply the data mask as a second argument to `eval_tidy()`
-
-```{r}
-q1 <- new_quosure(expr(x * y), env(x = 100))
-df <- data.frame(y = 1:10)
-
-eval_tidy(q1, df)
-```
-
-Everything together, in one function.
-
-```{r}
-with2 <- function(data, expr) {
- expr <- enquo(expr)
- eval_tidy(expr, data)
-}
-```
-
-But we need to create the objects that are not part of our data mask
-```{r}
-x <- 100
-with2(df, x * y)
-```
-
-Also doable with `base::eval()` instead of `rlang::eval_tidy()` but we have to use `base::substitute()` instead of `enquo()` (like we did for `enexpr()`) and we need to specify the environment.
-
-```{r}
-with3 <- function(data, expr) {
- expr <- substitute(expr)
- eval(expr, data, caller_env())
-}
-```
-
-```{r}
-with3(df, x*y)
-```
-
-## Pronouns: .data$ and .env$
-
-**Ambiguity!!**
-
-An object value can come from the env or from the data mask
-
-```{r}
-q1 <- new_quosure(expr(x * y + x), env = env(x = 1))
-df <- data.frame(y = 1:5,
- x = 10)
-
-eval_tidy(q1, df)
-```
-
-We use pronouns:
-
-- `.data$x`: `x` from the data mask
-- `.env$x`: `x` from the environment
-
-
-```{r}
-q1 <- new_quosure(expr(.data$x * y + .env$x), env = env(x = 1))
-eval_tidy(q1, df)
-```
-
-## Application: reimplementing `base::subset()`
-
-`base::subset()` works like `dplyr::filter()`: it selects rows of a data frame given an expression.
-
-What do we need?
-
-- Quote the expression to filter
-- Figure out which rows in the data frame pass the filter
-- Subset the data frame
-
-```{r}
-subset2 <- function(data, rows) {
- rows <- enquo(rows)
- rows_val <- eval_tidy(rows, data)
- stopifnot(is.logical(rows_val))
-
- data[rows_val, , drop = FALSE]
-}
-```
-
-```{r}
-sample_df <- data.frame(a = 1:5, b = 5:1, c = c(5, 3, 2, 4, 1))
-
-# Shorthand for sample_df[sample_df$b == sample_df$c, ]
-subset2(sample_df, b == c)
-```
-
-## Using tidy evaluation
-
-Most of the time we might not call it directly, but call a function that uses `eval_tidy()` (becoming developer AND user)
-
-**Use case**: resample and subset
-
-We have a function that resamples a dataset:
-
-```{r}
-resample <- function(df, n) {
- idx <- sample(nrow(df), n, replace = TRUE)
- df[idx, , drop = FALSE]
-}
-```
-
-```{r}
-resample(sample_df, 10)
-```
-
-But we also want to use subset and we want to create a function that allow us to resample and subset (with `subset2()`) in a single step.
-
-First attempt:
-
-```{r}
-subsample <- function(df, cond, n = nrow(df)) {
- df <- subset2(df, cond)
- resample(df, n)
-}
-```
-
-```{r error=TRUE}
-subsample(sample_df, b == c, 10)
-```
-
-What happened?
-
-`subsample()` doesn't quote any arguments and `cond` is evaluated normally
-
-So we have to quote `cond` and unquote it when we pass it to `subset2()`
-
-```{r}
-subsample <- function(df, cond, n = nrow(df)) {
- cond <- enquo(cond)
-
- df <- subset2(df, !!cond)
- resample(df, n)
-}
-```
-
-```{r}
-subsample(sample_df, b == c, 10)
-```
-
-**Be careful!**, potential ambiguity:
-
-```{r}
-threshold_x <- function(df, val) {
- subset2(df, x >= val)
-}
-```
-
-What would happen if `x` exists in the calling environment but doesn't exist in `df`? Or if `val` also exists in `df`?
-
-So, as developers of `threshold_x()` and users of `subset2()`, we have to add some pronouns:
-
-```{r}
-threshold_x <- function(df, val) {
- subset2(df, .data$x >= .env$val)
-}
-```
-
-
-Just remember:
-
-> As a general rule of thumb, as a function author it’s your responsibility
-> to avoid ambiguity with any expressions that you create;
-> it’s the user’s responsibility to avoid ambiguity in expressions that they create.
-
-
-## Base evaluation
-
-Check 20.6 in the book!
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/4En_Ypvtjqw")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/ewHAlVwCGtY")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/0K1vyiV8_qo")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/kfwjJDuyN8U")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/WzfD9GK6nCI")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/8FT2BA18Ghg")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-01:00:42 Trevin: They just want to help you present that’s all
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/g77Jfl_xrXM")`
-
-<details>
-<summary>Meeting chat log</summary>
-```
-00:55:22 collinberke: https://rlang.r-lib.org/reference/embrace-operator.html?q=enquo#under-the-hood
-```
-</details>
-
-`r knitr::include_url("https://www.youtube.com/embed/wPLrafScijE")`
diff --git a/slides/21.Rmd b/slides/21.Rmd
@@ -0,0 +1,725 @@
+---
+engine: knitr
+title: Translating R code
+---
+
+## Learning objectives:
+
+- Build DSL (domain specific languages) to aid interoperability between R, HTML and LaTeX
+- Reinforce metaprogramming concepts (expressions, quasiquotation, evaluation)
+
+```{r, echo = FALSE, eval = TRUE}
+DiagrammeR::mermaid("
+graph LR
+
+expressions --> R
+quasiquotation --> R
+evaluation --> R
+
+R --> HTML
+R --> LaTeX
+")
+```
+
+<details>
+<summary>Mermaid code</summary>
+```{r, echo = TRUE, eval = FALSE}
+DiagrammeR::mermaid("
+graph LR
+
+expressions --> R
+quasiquotation --> R
+evaluation --> R
+
+R --> HTML
+R --> LaTeX
+")
+```
+
+</details>
+
+<details>
+<summary>Session Info</summary>
+```{r, message = FALSE, warning = FALSE}
+library(DiagrammeR) #for Mermaid flowchart
+library(lobstr) #abstract syntax trees
+library(purrr) #functional programming
+library(rlang) #tidy evaluation
+
+# from section 18.5
+expr_type <- function(x) {
+ if (rlang::is_syntactic_literal(x)) {
+ "constant"
+ } else if (is.symbol(x)) {
+ "symbol"
+ } else if (is.call(x)) {
+ "call"
+ } else if (is.pairlist(x)) {
+ "pairlist"
+ } else {
+ typeof(x)
+ }
+}
+flat_map_chr <- function(.x, .f, ...) {
+ purrr::flatten_chr(purrr::map(.x, .f, ...))
+}
+switch_expr <- function(x, ...) {
+ switch(expr_type(x),
+ ...,
+ stop("Don't know how to handle type ", typeof(x), call. = FALSE)
+ )
+}
+```
+
+```{r}
+utils::sessionInfo()
+```
+
+</details>
+
+## Case Study: MCQ
+
+We are going to use R code to generate HTML or LaTeX to produce multiple-choice questions such as
+
+### Pop Quiz!
+
+1. What is the **derivative** of $f(x) = 1 + 2\cos(3\pi x + 4)$?
+
+ a. $f'(x) = 6\pi\sin(3\pi x + 4)$
+ b. $f'(x) = -6\pi\sin(3\pi x + 4)$
+ c. $f'(x) = 24\pi\sin(3\pi x + 4)$
+ d. $f'(x) = -24\pi\sin(3\pi x + 4)$
+
+
+
+
+
+---
+
+As developers, we may be asking ourselves:
+
+* What are the expressions?
+* What are the symbols?
+* Will we have to quote inputs from the user (math teacher)?
+
+
+## HTML
+
+We are trying to produce
+
+```{}
+<body>
+ <h1 id = 'pop_quiz'>Pop Quiz</h1>
+ <ol>
+ <li>What is the <b>derivative</b> of $f(x) = 1 + 2\cos(3\pi x + 4)$?</li>
+ <ol>
+ <li>$f'(x) = 6\pi\sin(3\pi x + 4)$</li>
+ <li>$f'(x) = -6\pi\sin(3\pi x + 4)$</li>
+ <li>$f'(x) = 24\pi\sin(3\pi x + 4)$</li>
+ <li>$f'(x) = -24\pi\sin(3\pi x + 4)$</li>
+ </ol>
+ </ol>
+ <img src = 'calculus_cat.png' width = '100' height = '100' />
+</body>
+```
+
+using DSL
+
+```{r, eval = FALSE}
+with_html(
+ body(
+ h1("Pop quiz!", id = "pop_quiz"),
+ ol(
+ li("What is the ", b("derivative"), "of $f(x) = 1 + 2cos(3pi x + 4)$?"),
+ ol(
+ li("$f'(x) = 6pi*sin(3pi x + 4)$"),
+ li("$f'(x) = -6pi*sin(3pi x + 4)$"),
+ li("$f'(x) = 24pi*sin(3pi x + 4)$"),
+ li("$f'(x) = -24pi*sin(3pi x + 4)$")
+ )
+ ),
+ img(src = "images/translating/calculus_cat.png", width = 100, height = 100)
+ )
+)
+```
+
+In particular,
+
+* **tags** such as `<b></b>` have *attributes*
+* **void tags** such as `<img />`
+* special characters: `&`, `<`, and `>`
+
+
+<details>
+<summary>HTML verification</summary>
+
+```{=html}
+<body>
+ <h1 id = 'pop_quiz'>Pop Quiz</h1>
+ <ol>
+ <li>What is the <b>derivative</b> of $f(x) = 1 + 2\cos(3\pi x + 4)$?</li>
+ <ol>
+ <li>$f'(x) = 6\pi\sin(3\pi x + 4)$</li>
+ <li>$f'(x) = -6\pi\sin(3\pi x + 4)$</li>
+ <li>$f'(x) = 24\pi\sin(3\pi x + 4)$</li>
+ <li>$f'(x) = -24\pi\sin(3\pi x + 4)$</li>
+ </ol>
+ </ol>
+ <img src = 'images/translating/calculus_cat.png' width = '100' height = '100' />
+</body>
+```
+
+</details>
+
+
+## Escaping
+
+* need to escape `&`, `<`, and `>`
+* don't "double escape"
+* leave HTML alone
+
+### S3 Class
+
+```{r}
+html <- function(x) structure(x, class = "advr_html")
+
+#dispatch
+print.advr_html <- function(x, ...) {
+ out <- paste0("<HTML> ", x)
+ cat(paste(strwrap(out), collapse = "\n"), "\n", sep = "")
+}
+```
+
+### Generic
+
+```{r}
+escape <- function(x) UseMethod("escape")
+escape.character <- function(x) {
+ x <- gsub("&", "&", x)
+ x <- gsub("<", "<", x)
+ x <- gsub(">", ">", x)
+ html(x)
+}
+escape.advr_html <- function(x) x
+```
+
+### Checks
+
+```{r}
+escape("This is some text.")
+escape("x > 1 & y < 2")
+escape(escape("This is some text. 1 > 2")) #double escape
+escape(html("<hr />")) #already html
+```
+
+
+## Named Components
+
+```{}
+li("What is the ", b("derivative"), "of $f(x) = 1 + 2\cos(3\pi x + 4)$?")
+```
+
+* aiming to classify `li` and `b` as **named components**
+
+```{r}
+dots_partition <- function(...) {
+ dots <- list2(...)
+
+ if (is.null(names(dots))) {
+ is_named <- rep(FALSE, length(dots))
+} else {
+ is_named <- names(dots) != ""
+}
+
+ list(
+ named = dots[is_named],
+ unnamed = dots[!is_named]
+ )
+}
+```
+
+### Check
+
+```{r}
+str(dots_partition(company = "Posit",
+ software = "RStudio",
+ "DSLC",
+ "Cohort 9"))
+```
+
+<details>
+<summary>HTML Attributes</summary>
+
+Found among the textbook's [source code](https://github.com/hadley/adv-r/blob/master/dsl-html-attributes.r)
+
+```{r}
+html_attributes <- function(list) {
+ if (length(list) == 0) return("")
+
+ attr <- map2_chr(names(list), list, html_attribute)
+ paste0(" ", unlist(attr), collapse = "")
+}
+html_attribute <- function(name, value = NULL) {
+ if (length(value) == 0) return(name) # for attributes with no value
+ if (length(value) != 1) stop("`value` must be NULL or length 1")
+
+ if (is.logical(value)) {
+ # Convert T and F to true and false
+ value <- tolower(value)
+ } else {
+ value <- escape_attr(value)
+ }
+ paste0(name, "='", value, "'")
+}
+escape_attr <- function(x) {
+ x <- escape.character(x)
+ x <- gsub("\'", ''', x)
+ x <- gsub("\"", '"', x)
+ x <- gsub("\r", ' ', x)
+ x <- gsub("\n", ' ', x)
+ x
+}
+```
+
+
+</details>
+
+
+## Tags (calls)
+
+```{r}
+tag <- function(tag) {
+ new_function(
+ exprs(... = ), #arguments of new function
+ expr({ #body of the new function
+
+ #classify tags as named components
+ dots <- dots_partition(...)
+
+ #focus on named components as the tags
+ attribs <- html_attributes(dots$named)
+
+ # otherwise, nested code
+ children <- map_chr(dots$unnamed, escape)
+
+ # paste brackets, tag names, and attributes together
+ # then unquote user arguments
+ html(paste0(
+ !!paste0("<", tag), attribs, ">",
+ paste(children, collapse = ""),
+ !!paste0("</", tag, ">")
+ ))
+ }),
+ caller_env() #return the environment
+ )
+}
+```
+
+<details>
+<summary>Void tags</summary>
+
+```{r}
+void_tag <- function(tag) {
+ new_function(
+ exprs(... = ), #allows for missing arguments
+ expr({
+ dots <- dots_partition(...)
+
+ # error check
+ if (length(dots$unnamed) > 0) {
+ abort(!!paste0("<", tag, "> must not have unnamed arguments"))
+ }
+ attribs <- html_attributes(dots$named)
+
+ html(paste0(!!paste0("<", tag), attribs, " />"))
+ }),
+ caller_env()
+ )
+}
+```
+
+</details>
+
+### Checks
+
+```{r}
+tag("ol")
+```
+
+```{r}
+img <- void_tag("img")
+```
+
+```{r, error = TRUE, results = "asis"}
+img()
+```
+
+```{r}
+img(src = "images/translating/calculus_cat.png",
+ width = 100,
+ height = 100)
+```
+
+
+## Tags (processing)
+
+<details>
+<summary>Venn Diagram</summary>
+
+```{r}
+tags <- c("a", "abbr", "address", "article", "aside", "audio",
+ "b","bdi", "bdo", "blockquote", "body", "button", "canvas",
+ "caption","cite", "code", "colgroup", "data", "datalist",
+ "dd", "del","details", "dfn", "div", "dl", "dt", "em",
+ "eventsource","fieldset", "figcaption", "figure", "footer",
+ "form", "h1", "h2", "h3", "h4", "h5", "h6", "head", "header",
+ "hgroup", "html", "i","iframe", "ins", "kbd", "label",
+ "legend", "li", "mark", "map","menu", "meter", "nav",
+ "noscript", "object", "ol", "optgroup", "option", "output",
+ "p", "pre", "progress", "q", "ruby", "rp","rt", "s", "samp",
+ "script", "section", "select", "small", "span", "strong",
+ "style", "sub", "summary", "sup", "table", "tbody", "td",
+ "textarea", "tfoot", "th", "thead", "time", "title", "tr",
+ "u", "ul", "var", "video"
+)
+
+void_tags <- c("area", "base", "br", "col", "command", "embed",
+ "hr", "img", "input", "keygen", "link", "meta", "param",
+ "source", "track", "wbr"
+)
+```
+
+</details>
+
+```{r}
+html_tags <- c(
+ tags |> #list of tag names from HTML
+ set_names() |> #named variable to avoid reserved words!
+ map(tag), #make them function calls
+ void_tags |>
+ set_names() |>
+ map(void_tag)
+)
+```
+
+
+### Example
+
+```{r}
+html_tags$ol(
+ html_tags$li("What is the ",
+ html_tags$b("derivative"),
+ "of $f(x) = 1 + 2cos(3pi x + 4)$?"))
+```
+
+
+## Bringing the HTML Together
+
+```{r}
+with_html <- function(code) {
+ eval_tidy(enquo(code), html_tags)
+}
+```
+
+### Main Example
+
+```{r}
+with_html(
+ body(
+ h1("Pop quiz!", id = "pop_quiz"),
+ ol(
+ li("What is the ", b("derivative"), "of $f(x) = 1 + 2cos(3pi x + 4)$?"),
+ ol(
+ li("$f'(x) = 6pi*sin(3pi x + 4)$"),
+ li("$f'(x) = -6pi*sin(3pi x + 4)$"),
+ li("$f'(x) = 24pi*sin(3pi x + 4)$"),
+ li("$f'(x) = -24pi*sin(3pi x + 4)$")
+ )
+ ),
+ img(src = "images/translating/calculus_cat.png", width = 100, height = 100)
+ )
+)
+```
+
+### Check
+
+```{=html}
+<h1 id='pop_quiz'>Pop quiz!</h1><ol><li>What is the <b>derivative</b> of $f(x) = 1 + 2cos(3pi x + 4)$?</li><ol><li>$f'(x) = 6pi*sin(3pi x + 4)$</li><li>$f'(x) = -6pi*sin(3pi x + 4)$</li><li>$f'(x) = 24pi*sin(3pi x + 4)$</li><li>$f'(x) = -24pi*sin(3pi x + 4)$</li></ol></ol><img src='images/translating/calculus_cat.png' width='100' height='100' />
+```
+
+
+## LaTeX
+
+```{r}
+latex <- function(x) structure(x, class = "advr_latex")
+print.advr_latex <- function(x) { cat("<LATEX> ", x, "\n", sep = "") }
+```
+
+### to_math
+
+```{r, eval = FALSE}
+to_math <- function(x) {
+ expr <- enexpr(x)
+ latex( #return LaTeX code
+ eval_bare( #eval_bare to ensure use of latex environment
+ expr, #expression (not quosure)
+ latex_env(expr) #need to define latex_env
+ ))
+}
+```
+
+## Known Symbols
+
+```{r}
+greek_letters <- c(
+ "alpha", "beta", "chi", "delta", "Delta", "epsilon", "eta",
+"gamma", "Gamma", "iota", "kappa", "lambda", "Lambda", "mu",
+"nu", "omega", "Omega", "phi", "Phi", "pi", "Pi", "psi", "Psi",
+"rho", "sigma", "Sigma", "tau", "theta", "Theta", "upsilon",
+"Upsilon", "varepsilon", "varphi", "varrho", "vartheta", "xi",
+"Xi", "zeta"
+)
+
+greek_env <- rlang::as_environment(
+ rlang::set_names(
+ paste0("\\", greek_letters), #latex values
+ greek_letters #R names
+ )
+)
+```
+
+```{r}
+str(as.list(greek_env))
+```
+
+
+## Known Functions
+
+### Unary Operations
+
+```{r}
+unary_op <- function(left, right) {
+ new_function(
+ exprs(e1 = ),
+ expr(
+ paste0(!!left, e1, !!right)
+ ),
+ caller_env()
+ )
+}
+```
+
+```{r}
+#example
+unary_op("\\sqrt{", "}")
+```
+
+### Binary Operations
+
+```{r}
+binary_op <- function(sep) {
+ new_function(
+ exprs(e1 = , e2 = ),
+ expr(
+ paste0(e1, !!sep, e2)
+ ),
+ caller_env()
+ )
+}
+```
+
+```{r}
+#example
+binary_op("+")
+```
+
+<details>
+<summary>Even more LaTeX syntax</summary>
+
+```{r}
+known_func_env <- child_env(
+ .parent = empty_env(),
+
+ # Binary operators
+ `+` = binary_op(" + "),
+ `-` = binary_op(" - "),
+ `*` = binary_op(" * "),
+ `/` = binary_op(" / "),
+ `^` = binary_op("^"),
+ `[` = binary_op("_"),
+
+ # Grouping
+ `{` = unary_op("\\left{ ", " \\right}"),
+ `(` = unary_op("\\left( ", " \\right)"),
+ paste = paste,
+
+ # Other math functions
+ sqrt = unary_op("\\sqrt{", "}"),
+ sin = unary_op("\\sin(", ")"),
+ cos = unary_op("\\cos(", ")"),
+ tan = unary_op("\\tan(", ")"),
+ log = unary_op("\\log(", ")"),
+ abs = unary_op("\\left| ", "\\right| "),
+ frac = function(a, b) {
+ paste0("\\frac{", a, "}{", b, "}")
+ },
+
+ # Labelling
+ hat = unary_op("\\hat{", "}"),
+ tilde = unary_op("\\tilde{", "}")
+)
+```
+
+</details>
+
+
+## Unknown Symbols
+
+```{r}
+names_grabber <- function(x) {
+ switch_expr(x,
+ constant = character(),
+ symbol = as.character(x),
+ call = flat_map_chr(as.list(x[-1]), names_grabber)
+ ) |>
+ unique()
+}
+```
+
+$$x + y + f(a, b, c, 10)$$
+
+```{r}
+names_grabber(expr(x + y + f(a, b, c, 10)))
+```
+
+```{r}
+lobstr::ast(expr(x + y + f(a, b, c, 10)))
+```
+
+
+## Unknown Functions
+
+```{r}
+calls_grabber <- function(x) {
+ switch_expr(x,
+ constant = ,
+ symbol = character(),
+ call = {
+ fname <- as.character(x[[1]])
+ children <- flat_map_chr(as.list(x[-1]), calls_grabber)
+ c(fname, children)
+ }
+ ) |>
+ unique()
+}
+```
+
+$$f(g + b, c, d(a))$$
+
+```{r}
+names_grabber(expr(f(g + b, c, d(a))))
+calls_grabber(expr(f(g + b, c, d(a))))
+lobstr::ast(expr(f(g + b, c, d(a))))
+```
+
+---
+
+```{r}
+seek_closure <- function(op) {
+ # change math font for function names
+ # apply ending parenthesis
+ new_function(
+ exprs(... = ),
+ expr({
+ contents <- paste(..., collapse = ", ")
+ paste0(!!paste0("\\mathrm{", op, "}("), contents, ")")
+ })
+ )
+}
+```
+
+## Bringing the LaTeX Together
+
+```{r}
+latex_env <- function(expr) {
+
+ # Unknown Functions
+ calls <- calls_grabber(expr)
+ call_list <- map(set_names(calls), seek_closure)
+ call_env <- as_environment(call_list)
+
+ # Known Functions
+ known_func_env <- env_clone(known_func_env, call_env)
+
+ # Unknown Symbols
+ names <- names_grabber(expr)
+ symbol_env <- as_environment(set_names(names), parent = known_func_env)
+
+ # Known symbols
+ greek_env <- env_clone(greek_env, parent = symbol_env)
+ greek_env
+}
+
+to_math <- function(x) {
+ expr <- enexpr(x)
+ latex( #return LaTeX code
+ eval_bare( #eval_bare to ensure use of latex environment
+ expr, #expression (not quosure)
+ latex_env(expr) #need to define latex_env
+ ))
+}
+```
+
+### Check
+
+```{r}
+to_math(sin(pi) + f(a))
+```
+
+## Finishing the Example
+
+(TO DO)
+
+
+
+
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/fixyitpXrwY")`
+
+`r knitr::include_url("https://www.youtube.com/embed/h3RNPyhIjas")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/pj0hTW1CtbI")`
+
+### Cohort 3
+
+(no video)
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/0TclsXa085Y")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/v_dkrIEdmKE")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/_-uwFjO5CyM")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:30:16 Arthur Shaw: https://www.w3schools.com/html/html_entities.asp
+00:32:29 Arthur Shaw: Beta symbol in HTML: Β
+00:56:55 Arthur Shaw: https://dbplyr.tidyverse.org/articles/translation-function.html
+00:57:48 Arthur Shaw: https://dtplyr.tidyverse.org/index.html
+00:58:43 Arthur Shaw: https://dtplyr.tidyverse.org/articles/translation.html
+```
+</details>
diff --git a/slides/21_Translating_R_code.Rmd b/slides/21_Translating_R_code.Rmd
@@ -1,722 +0,0 @@
-# Translating R code
-
-**Learning objectives:**
-
-- Build DSL (domain specific languages) to aid interoperability between R, HTML and LaTeX
-- Reinforce metaprogramming concepts (expressions, quasiquotation, evaluation)
-
-```{r, echo = FALSE, eval = TRUE}
-DiagrammeR::mermaid("
-graph LR
-
-expressions --> R
-quasiquotation --> R
-evaluation --> R
-
-R --> HTML
-R --> LaTeX
-")
-```
-
-<details>
-<summary>Mermaid code</summary>
-```{r, echo = TRUE, eval = FALSE}
-DiagrammeR::mermaid("
-graph LR
-
-expressions --> R
-quasiquotation --> R
-evaluation --> R
-
-R --> HTML
-R --> LaTeX
-")
-```
-
-</details>
-
-<details>
-<summary>Session Info</summary>
-```{r, message = FALSE, warning = FALSE}
-library(DiagrammeR) #for Mermaid flowchart
-library(lobstr) #abstract syntax trees
-library(purrr) #functional programming
-library(rlang) #tidy evaluation
-
-# from section 18.5
-expr_type <- function(x) {
- if (rlang::is_syntactic_literal(x)) {
- "constant"
- } else if (is.symbol(x)) {
- "symbol"
- } else if (is.call(x)) {
- "call"
- } else if (is.pairlist(x)) {
- "pairlist"
- } else {
- typeof(x)
- }
-}
-flat_map_chr <- function(.x, .f, ...) {
- purrr::flatten_chr(purrr::map(.x, .f, ...))
-}
-switch_expr <- function(x, ...) {
- switch(expr_type(x),
- ...,
- stop("Don't know how to handle type ", typeof(x), call. = FALSE)
- )
-}
-```
-
-```{r}
-utils::sessionInfo()
-```
-
-</details>
-
-## Case Study: MCQ
-
-We are going to use R code to generate HTML or LaTeX to produce multiple-choice questions such as
-
-### Pop Quiz!
-
-1. What is the **derivative** of $f(x) = 1 + 2\cos(3\pi x + 4)$?
-
- a. $f'(x) = 6\pi\sin(3\pi x + 4)$
- b. $f'(x) = -6\pi\sin(3\pi x + 4)$
- c. $f'(x) = 24\pi\sin(3\pi x + 4)$
- d. $f'(x) = -24\pi\sin(3\pi x + 4)$
-
-
-
-
-
----
-
-As developers, we may be asking ourselves:
-
-* What are the expressions?
-* What are the symbols?
-* Will we have to quote inputs from the user (math teacher)?
-
-
-## HTML
-
-We are trying to produce
-
-```{}
-<body>
- <h1 id = 'pop_quiz'>Pop Quiz</h1>
- <ol>
- <li>What is the <b>derivative</b> of $f(x) = 1 + 2\cos(3\pi x + 4)$?</li>
- <ol>
- <li>$f'(x) = 6\pi\sin(3\pi x + 4)$</li>
- <li>$f'(x) = -6\pi\sin(3\pi x + 4)$</li>
- <li>$f'(x) = 24\pi\sin(3\pi x + 4)$</li>
- <li>$f'(x) = -24\pi\sin(3\pi x + 4)$</li>
- </ol>
- </ol>
- <img src = 'calculus_cat.png' width = '100' height = '100' />
-</body>
-```
-
-using DSL
-
-```{r, eval = FALSE}
-with_html(
- body(
- h1("Pop quiz!", id = "pop_quiz"),
- ol(
- li("What is the ", b("derivative"), "of $f(x) = 1 + 2cos(3pi x + 4)$?"),
- ol(
- li("$f'(x) = 6pi*sin(3pi x + 4)$"),
- li("$f'(x) = -6pi*sin(3pi x + 4)$"),
- li("$f'(x) = 24pi*sin(3pi x + 4)$"),
- li("$f'(x) = -24pi*sin(3pi x + 4)$")
- )
- ),
- img(src = "images/translating/calculus_cat.png", width = 100, height = 100)
- )
-)
-```
-
-In particular,
-
-* **tags** such as `<b></b>` have *attributes*
-* **void tags** such as `<img />`
-* special characters: `&`, `<`, and `>`
-
-
-<details>
-<summary>HTML verification</summary>
-
-```{=html}
-<body>
- <h1 id = 'pop_quiz'>Pop Quiz</h1>
- <ol>
- <li>What is the <b>derivative</b> of $f(x) = 1 + 2\cos(3\pi x + 4)$?</li>
- <ol>
- <li>$f'(x) = 6\pi\sin(3\pi x + 4)$</li>
- <li>$f'(x) = -6\pi\sin(3\pi x + 4)$</li>
- <li>$f'(x) = 24\pi\sin(3\pi x + 4)$</li>
- <li>$f'(x) = -24\pi\sin(3\pi x + 4)$</li>
- </ol>
- </ol>
- <img src = 'images/translating/calculus_cat.png' width = '100' height = '100' />
-</body>
-```
-
-</details>
-
-
-## Escaping
-
-* need to escape `&`, `<`, and `>`
-* don't "double escape"
-* leave HTML alone
-
-### S3 Class
-
-```{r}
-html <- function(x) structure(x, class = "advr_html")
-
-#dispatch
-print.advr_html <- function(x, ...) {
- out <- paste0("<HTML> ", x)
- cat(paste(strwrap(out), collapse = "\n"), "\n", sep = "")
-}
-```
-
-### Generic
-
-```{r}
-escape <- function(x) UseMethod("escape")
-escape.character <- function(x) {
- x <- gsub("&", "&", x)
- x <- gsub("<", "<", x)
- x <- gsub(">", ">", x)
- html(x)
-}
-escape.advr_html <- function(x) x
-```
-
-### Checks
-
-```{r}
-escape("This is some text.")
-escape("x > 1 & y < 2")
-escape(escape("This is some text. 1 > 2")) #double escape
-escape(html("<hr />")) #already html
-```
-
-
-## Named Components
-
-```{}
-li("What is the ", b("derivative"), "of $f(x) = 1 + 2\cos(3\pi x + 4)$?")
-```
-
-* aiming to classify `li` and `b` as **named components**
-
-```{r}
-dots_partition <- function(...) {
- dots <- list2(...)
-
- if (is.null(names(dots))) {
- is_named <- rep(FALSE, length(dots))
-} else {
- is_named <- names(dots) != ""
-}
-
- list(
- named = dots[is_named],
- unnamed = dots[!is_named]
- )
-}
-```
-
-### Check
-
-```{r}
-str(dots_partition(company = "Posit",
- software = "RStudio",
- "DSLC",
- "Cohort 9"))
-```
-
-<details>
-<summary>HTML Attributes</summary>
-
-Found among the textbook's [source code](https://github.com/hadley/adv-r/blob/master/dsl-html-attributes.r)
-
-```{r}
-html_attributes <- function(list) {
- if (length(list) == 0) return("")
-
- attr <- map2_chr(names(list), list, html_attribute)
- paste0(" ", unlist(attr), collapse = "")
-}
-html_attribute <- function(name, value = NULL) {
- if (length(value) == 0) return(name) # for attributes with no value
- if (length(value) != 1) stop("`value` must be NULL or length 1")
-
- if (is.logical(value)) {
- # Convert T and F to true and false
- value <- tolower(value)
- } else {
- value <- escape_attr(value)
- }
- paste0(name, "='", value, "'")
-}
-escape_attr <- function(x) {
- x <- escape.character(x)
- x <- gsub("\'", ''', x)
- x <- gsub("\"", '"', x)
- x <- gsub("\r", ' ', x)
- x <- gsub("\n", ' ', x)
- x
-}
-```
-
-
-</details>
-
-
-## Tags (calls)
-
-```{r}
-tag <- function(tag) {
- new_function(
- exprs(... = ), #arguments of new function
- expr({ #body of the new function
-
- #classify tags as named components
- dots <- dots_partition(...)
-
- #focus on named components as the tags
- attribs <- html_attributes(dots$named)
-
- # otherwise, nested code
- children <- map_chr(dots$unnamed, escape)
-
- # paste brackets, tag names, and attributes together
- # then unquote user arguments
- html(paste0(
- !!paste0("<", tag), attribs, ">",
- paste(children, collapse = ""),
- !!paste0("</", tag, ">")
- ))
- }),
- caller_env() #return the environment
- )
-}
-```
-
-<details>
-<summary>Void tags</summary>
-
-```{r}
-void_tag <- function(tag) {
- new_function(
- exprs(... = ), #allows for missing arguments
- expr({
- dots <- dots_partition(...)
-
- # error check
- if (length(dots$unnamed) > 0) {
- abort(!!paste0("<", tag, "> must not have unnamed arguments"))
- }
- attribs <- html_attributes(dots$named)
-
- html(paste0(!!paste0("<", tag), attribs, " />"))
- }),
- caller_env()
- )
-}
-```
-
-</details>
-
-### Checks
-
-```{r}
-tag("ol")
-```
-
-```{r}
-img <- void_tag("img")
-```
-
-```{r, error = TRUE, results = "asis"}
-img()
-```
-
-```{r}
-img(src = "images/translating/calculus_cat.png",
- width = 100,
- height = 100)
-```
-
-
-## Tags (processing)
-
-<details>
-<summary>Venn Diagram</summary>
-
-```{r}
-tags <- c("a", "abbr", "address", "article", "aside", "audio",
- "b","bdi", "bdo", "blockquote", "body", "button", "canvas",
- "caption","cite", "code", "colgroup", "data", "datalist",
- "dd", "del","details", "dfn", "div", "dl", "dt", "em",
- "eventsource","fieldset", "figcaption", "figure", "footer",
- "form", "h1", "h2", "h3", "h4", "h5", "h6", "head", "header",
- "hgroup", "html", "i","iframe", "ins", "kbd", "label",
- "legend", "li", "mark", "map","menu", "meter", "nav",
- "noscript", "object", "ol", "optgroup", "option", "output",
- "p", "pre", "progress", "q", "ruby", "rp","rt", "s", "samp",
- "script", "section", "select", "small", "span", "strong",
- "style", "sub", "summary", "sup", "table", "tbody", "td",
- "textarea", "tfoot", "th", "thead", "time", "title", "tr",
- "u", "ul", "var", "video"
-)
-
-void_tags <- c("area", "base", "br", "col", "command", "embed",
- "hr", "img", "input", "keygen", "link", "meta", "param",
- "source", "track", "wbr"
-)
-```
-
-</details>
-
-```{r}
-html_tags <- c(
- tags |> #list of tag names from HTML
- set_names() |> #named variable to avoid reserved words!
- map(tag), #make them function calls
- void_tags |>
- set_names() |>
- map(void_tag)
-)
-```
-
-
-### Example
-
-```{r}
-html_tags$ol(
- html_tags$li("What is the ",
- html_tags$b("derivative"),
- "of $f(x) = 1 + 2cos(3pi x + 4)$?"))
-```
-
-
-## Bringing the HTML Together
-
-```{r}
-with_html <- function(code) {
- eval_tidy(enquo(code), html_tags)
-}
-```
-
-### Main Example
-
-```{r}
-with_html(
- body(
- h1("Pop quiz!", id = "pop_quiz"),
- ol(
- li("What is the ", b("derivative"), "of $f(x) = 1 + 2cos(3pi x + 4)$?"),
- ol(
- li("$f'(x) = 6pi*sin(3pi x + 4)$"),
- li("$f'(x) = -6pi*sin(3pi x + 4)$"),
- li("$f'(x) = 24pi*sin(3pi x + 4)$"),
- li("$f'(x) = -24pi*sin(3pi x + 4)$")
- )
- ),
- img(src = "images/translating/calculus_cat.png", width = 100, height = 100)
- )
-)
-```
-
-### Check
-
-```{=html}
-<h1 id='pop_quiz'>Pop quiz!</h1><ol><li>What is the <b>derivative</b> of $f(x) = 1 + 2cos(3pi x + 4)$?</li><ol><li>$f'(x) = 6pi*sin(3pi x + 4)$</li><li>$f'(x) = -6pi*sin(3pi x + 4)$</li><li>$f'(x) = 24pi*sin(3pi x + 4)$</li><li>$f'(x) = -24pi*sin(3pi x + 4)$</li></ol></ol><img src='images/translating/calculus_cat.png' width='100' height='100' />
-```
-
-
-## LaTeX
-
-```{r}
-latex <- function(x) structure(x, class = "advr_latex")
-print.advr_latex <- function(x) { cat("<LATEX> ", x, "\n", sep = "") }
-```
-
-### to_math
-
-```{r, eval = FALSE}
-to_math <- function(x) {
- expr <- enexpr(x)
- latex( #return LaTeX code
- eval_bare( #eval_bare to ensure use of latex environment
- expr, #expression (not quosure)
- latex_env(expr) #need to define latex_env
- ))
-}
-```
-
-## Known Symbols
-
-```{r}
-greek_letters <- c(
- "alpha", "beta", "chi", "delta", "Delta", "epsilon", "eta",
-"gamma", "Gamma", "iota", "kappa", "lambda", "Lambda", "mu",
-"nu", "omega", "Omega", "phi", "Phi", "pi", "Pi", "psi", "Psi",
-"rho", "sigma", "Sigma", "tau", "theta", "Theta", "upsilon",
-"Upsilon", "varepsilon", "varphi", "varrho", "vartheta", "xi",
-"Xi", "zeta"
-)
-
-greek_env <- rlang::as_environment(
- rlang::set_names(
- paste0("\\", greek_letters), #latex values
- greek_letters #R names
- )
-)
-```
-
-```{r}
-str(as.list(greek_env))
-```
-
-
-## Known Functions
-
-### Unary Operations
-
-```{r}
-unary_op <- function(left, right) {
- new_function(
- exprs(e1 = ),
- expr(
- paste0(!!left, e1, !!right)
- ),
- caller_env()
- )
-}
-```
-
-```{r}
-#example
-unary_op("\\sqrt{", "}")
-```
-
-### Binary Operations
-
-```{r}
-binary_op <- function(sep) {
- new_function(
- exprs(e1 = , e2 = ),
- expr(
- paste0(e1, !!sep, e2)
- ),
- caller_env()
- )
-}
-```
-
-```{r}
-#example
-binary_op("+")
-```
-
-<details>
-<summary>Even more LaTeX syntax</summary>
-
-```{r}
-known_func_env <- child_env(
- .parent = empty_env(),
-
- # Binary operators
- `+` = binary_op(" + "),
- `-` = binary_op(" - "),
- `*` = binary_op(" * "),
- `/` = binary_op(" / "),
- `^` = binary_op("^"),
- `[` = binary_op("_"),
-
- # Grouping
- `{` = unary_op("\\left{ ", " \\right}"),
- `(` = unary_op("\\left( ", " \\right)"),
- paste = paste,
-
- # Other math functions
- sqrt = unary_op("\\sqrt{", "}"),
- sin = unary_op("\\sin(", ")"),
- cos = unary_op("\\cos(", ")"),
- tan = unary_op("\\tan(", ")"),
- log = unary_op("\\log(", ")"),
- abs = unary_op("\\left| ", "\\right| "),
- frac = function(a, b) {
- paste0("\\frac{", a, "}{", b, "}")
- },
-
- # Labelling
- hat = unary_op("\\hat{", "}"),
- tilde = unary_op("\\tilde{", "}")
-)
-```
-
-</details>
-
-
-## Unknown Symbols
-
-```{r}
-names_grabber <- function(x) {
- switch_expr(x,
- constant = character(),
- symbol = as.character(x),
- call = flat_map_chr(as.list(x[-1]), names_grabber)
- ) |>
- unique()
-}
-```
-
-$$x + y + f(a, b, c, 10)$$
-
-```{r}
-names_grabber(expr(x + y + f(a, b, c, 10)))
-```
-
-```{r}
-lobstr::ast(expr(x + y + f(a, b, c, 10)))
-```
-
-
-## Unknown Functions
-
-```{r}
-calls_grabber <- function(x) {
- switch_expr(x,
- constant = ,
- symbol = character(),
- call = {
- fname <- as.character(x[[1]])
- children <- flat_map_chr(as.list(x[-1]), calls_grabber)
- c(fname, children)
- }
- ) |>
- unique()
-}
-```
-
-$$f(g + b, c, d(a))$$
-
-```{r}
-names_grabber(expr(f(g + b, c, d(a))))
-calls_grabber(expr(f(g + b, c, d(a))))
-lobstr::ast(expr(f(g + b, c, d(a))))
-```
-
----
-
-```{r}
-seek_closure <- function(op) {
- # change math font for function names
- # apply ending parenthesis
- new_function(
- exprs(... = ),
- expr({
- contents <- paste(..., collapse = ", ")
- paste0(!!paste0("\\mathrm{", op, "}("), contents, ")")
- })
- )
-}
-```
-
-## Bringing the LaTeX Together
-
-```{r}
-latex_env <- function(expr) {
-
- # Unknown Functions
- calls <- calls_grabber(expr)
- call_list <- map(set_names(calls), seek_closure)
- call_env <- as_environment(call_list)
-
- # Known Functions
- known_func_env <- env_clone(known_func_env, call_env)
-
- # Unknown Symbols
- names <- names_grabber(expr)
- symbol_env <- as_environment(set_names(names), parent = known_func_env)
-
- # Known symbols
- greek_env <- env_clone(greek_env, parent = symbol_env)
- greek_env
-}
-
-to_math <- function(x) {
- expr <- enexpr(x)
- latex( #return LaTeX code
- eval_bare( #eval_bare to ensure use of latex environment
- expr, #expression (not quosure)
- latex_env(expr) #need to define latex_env
- ))
-}
-```
-
-### Check
-
-```{r}
-to_math(sin(pi) + f(a))
-```
-
-## Finishing the Example
-
-(TO DO)
-
-
-
-
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/fixyitpXrwY")`
-
-`r knitr::include_url("https://www.youtube.com/embed/h3RNPyhIjas")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/pj0hTW1CtbI")`
-
-### Cohort 3
-
-(no video)
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/0TclsXa085Y")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/v_dkrIEdmKE")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/_-uwFjO5CyM")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:30:16 Arthur Shaw: https://www.w3schools.com/html/html_entities.asp
-00:32:29 Arthur Shaw: Beta symbol in HTML: Β
-00:56:55 Arthur Shaw: https://dbplyr.tidyverse.org/articles/translation-function.html
-00:57:48 Arthur Shaw: https://dtplyr.tidyverse.org/index.html
-00:58:43 Arthur Shaw: https://dtplyr.tidyverse.org/articles/translation.html
-```
-</details>
diff --git a/slides/22.Rmd b/slides/22.Rmd
@@ -0,0 +1,235 @@
+---
+engine: knitr
+title: Debugging
+---
+
+## Learning objectives:
+
+- General strategy for finding and fixing errors.
+
+- Explore the `traceback()` function to locate exactly where an error occurred
+
+- Explore how to pause the execution of a function and launch environment where we can interactively explore what’s happening
+
+- Explore debugging when you’re running code non-interactively
+
+- Explore non-error problems that occasionally also need debugging
+
+## Introduction {-}
+
+> Finding bug in code, is a process of confirming the many things that we believe are true — until we find one which is not true.
+
+**—Norm Matloff**
+
+> Debugging is like being the detective in a crime movie where you're also the murderer.
+
+**-Filipe Fortes**
+
+### Strategies for finding and fixing errors {-}
+
+#### Google! {-}
+Whenever you see an error message, start by googling it. We can automate this process with the [{errorist}](https://github.com/coatless-rpkg/errorist) and [{searcher}](https://github.com/coatless-rpkg/searcher) packages.
+
+#### Make it repeatable {-}
+To find the root cause of an error, you’re going to need to execute the code many times as you consider and reject hypotheses. It’s worth some upfront investment to make the problem both easy and fast to reproduce.
+
+#### Figure out where it is {-}
+To find the bug, adopt the scientific method: **generate hypotheses**, **design experiments to test them**, and **record your results**. This may seem like a lot of work, but a systematic approach will end up saving you time.
+
+#### Fix it and test it {-}
+Once you’ve found the bug, you need to figure out how to fix it and to check that the fix actually worked. It’s very useful to have automated tests in place.
+
+## Locating errors {-}
+The most important tool for finding errors is `traceback()`, which shows you the sequence of calls (also known as the **call stack**) that lead to the error.
+
+- Here’s a simple example where `f()` calls `g()` calls `h()` calls `i()`, which checks if its argument is numeric:
+
+
+When we run `f("a")` code in RStudio we see:
+
+
+
+
+If you click **“Show traceback”** you see:
+
+
+
+You read the `traceback()` output from bottom to top: the initial call is `f()`, which calls `g()`, then `h()`, then `i()`, which triggers the error.
+
+## Lazy evaluation {-}
+One drawback to `traceback()` is that it always **linearises** the call tree, which can be confusing if there is much lazy evaluation involved. For example, take the following example where the error happens when evaluating the first argument to `f()`:
+
+
+
+
+
+Note: `rlang::with_abort()` is no longer an exported object from 'namespace:rlang'. There is an [open issue](https://github.com/hadley/adv-r/issues/1740) about a fix for the chapter but no drop-in replacement.
+
+
+## Interactive debugger {-}
+Enter the interactive debugger is wwith RStudio’s **“Rerun with Debug”** tool. This reruns the command that created the error, pausing execution where the error occurred. Otherwise, you can insert a call to `browser()` where you want to pause, and re-run the function.
+
+
+
+`browser()` is just a regular function call which means that you can run it conditionally by wrapping it in an `if` statement:
+
+
+
+
+
+
+## `browser()` commands {-}
+`browser()` provides a few special commands.
+
+
+
+- Next, `n`: executes the next step in the function.
+
+- Step into, or `s`: works like next, but if the next step is a function, it will step into that function so you can explore it interactively.
+
+- Finish, or `f`: finishes execution of the current loop or function.
+
+- Continue, `c`: leaves interactive debugging and continues regular execution of the function.
+- Stop, `Q`: stops debugging, terminates the function, and returns to the global workspace.
+
+
+## Alternatives {-}
+There are three alternatives to using `browser()`: setting breakpoints in RStudio, `options(error = recover)`, and `debug()` and other related functions.
+
+## Breakpoints {-}
+In RStudio, you can set a breakpoint by clicking to the left of the line number, or pressing **Shift + F9.** There are two small downsides to breakpoints:
+
+- There are a few unusual situations in which breakpoints will not work. [Read breakpoint troubleshooting for more details](https://support.posit.co/hc/en-us/articles/200534337-Breakpoint-Troubleshooting)
+
+- RStudio currently does not support conditional breakpoints.
+
+## `recover()` {-}
+When you set `options(error = recover)`, when you get an error, you’ll get an interactive prompt that displays the traceback and gives you the ability to interactively debug inside any of the frames:
+
+
+You can return to default error handling with `options(error = NULL)`.
+
+## `debug()` {-}
+
+Another approach is to call a function that inserts the `browser()` call:
+
+- `debug()` inserts a browser statement in the first line of the specified function. undebug() removes it.
+
+- `utils::setBreakpoint()` works similarly, but instead of taking a function name, it takes a file name and line number and finds the appropriate function for you.
+
+
+## Call stack {-}
+The call stacks printed by `traceback()`, `browser()` & `where`, and `recover()` are not consistent.
+
+
+
+RStudio displays calls in the same order as `traceback()`. rlang functions use the same ordering and numbering as `recover()`, but also use indenting to reinforce the hierarchy of calls.
+
+## Non-interactive debugging {-}
+
+When you can’t explore interactively...
+
+### `callr::r()` {-}
+
+`callr::r(f, list(1, 2))` calls `f(1, 2)` in a fresh session to help diagnose:
+
+- Is the global environment different? Have you loaded different packages? Are objects left from previous sessions causing differences?
+
+- Is the working directory different?
+
+- Is the `PATH` environment variable different?
+
+- Is the `R_LIBS` environment variable different?
+
+### `dump.frames()` {-}
+
+`dump.frames()` is the equivalent to `recover()` for non-interactive code.
+
+
+
+### Print debugging {-}
+
+Insert numerous print statements to precisely locate the problem, and see the values of important variables. Print debugging is particularly useful for compiled code.
+
+
+
+
+### RMarkdown {-}
+
+- If you’re knitting the file using RStudio, switch to calling `rmarkdown::render("path/to/file.Rmd")` instead to run the code in the current session.
+
+- For interactive debugging, you’ll need to call `sink()` in the error handler. For example, to use `recover()` with RMarkdown, you’d put the following code in your setup block:
+
+{height="110"}
+
+
+
+## Non-error failures {-}
+There are other ways for a function to fail apart from throwing an error:
+
+- A function may generate an unexpected warning. Convert warnings into errors with `options(warn = 2)` and use the the call stack.
+
+- A function may generate an unexpected message. The removal of `with_abort()` from {rlang} breaks this solution.
+
+- A function might never return.
+
+- The worst scenario is that your code might crash R completely, leaving you with no way to interactively debug your code. This indicates a bug in compiled (C or C++) code.
+
+## Link to some useful resources on debugging {-}
+
+- Jenny Bryan's ["Object of type closure is not subsettable"](https://github.com/jennybc/debugging#readme) talk from rstudio::conf 2020
+
+- Jenny Bryan and Jim Hester's book: ["What They Forgot to Teach You About R"](https://rstats.wtf/debugging-r) Ch12
+
+- Hadley's video on a [minimal reprex for a shiny app](https://www.youtube.com/watch?v=9w8ANOAlWy4)
+
+## Meeting Videos {-}
+
+### Cohort 1 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/ROMefwMuqXU")`
+
+### Cohort 2 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/N43p4txxxlY")`
+
+### Cohort 3 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/Jdb00nepeWQ")`
+
+### Cohort 4 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/tOql7ZD6P58")`
+
+### Cohort 5 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/EqsSWUQ6ZW0")`
+
+### Cohort 6 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/YvT-knh1baA")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:12:43 Trevin Flickinger: Hello everyone!
+00:13:03 Oluwafemi Oyedele: Hello, Good evening!!!
+00:22:10 Trevin Flickinger: My connection is slow so I’ll be in the chat
+00:32:45 Trevin Flickinger: If you start with “continue” it should error out after the first call
+00:56:18 Trevin Flickinger: Sys.frame(-1) shows it goes back one frame
+00:59:55 fg: thanks
+01:03:11 Arthur Shaw: Anyone else lose the presentation?
+01:03:20 fg: yes
+01:03:22 fg: ?
+01:04:26 Trevin Flickinger: I thought that was my internet connection
+01:05:07 Trevin Flickinger: Thank you!
+01:08:42 Trevin Flickinger: I need to use debug( ) more as well
+01:10:15 Trevin Flickinger: 21st works for me
+01:10:29 Oluwafemi Oyedele: Same here!!!
+```
+</details>
+
+### Cohort 7 {-}
+
+`r knitr::include_url("https://www.youtube.com/embed/T_uFW9xXoJk")`
diff --git a/slides/22_Debugging.Rmd b/slides/22_Debugging.Rmd
@@ -1,232 +0,0 @@
-# Debugging
-
-### Learning objectives {-}
-
-- General strategy for finding and fixing errors.
-
-- Explore the `traceback()` function to locate exactly where an error occurred
-
-- Explore how to pause the execution of a function and launch environment where we can interactively explore what’s happening
-
-- Explore debugging when you’re running code non-interactively
-
-- Explore non-error problems that occasionally also need debugging
-
-## Introduction {-}
-
-> Finding bug in code, is a process of confirming the many things that we believe are true — until we find one which is not true.
-
-**—Norm Matloff**
-
-> Debugging is like being the detective in a crime movie where you're also the murderer.
-
-**-Filipe Fortes**
-
-### Strategies for finding and fixing errors {-}
-
-#### Google! {-}
-Whenever you see an error message, start by googling it. We can automate this process with the [{errorist}](https://github.com/coatless-rpkg/errorist) and [{searcher}](https://github.com/coatless-rpkg/searcher) packages.
-
-#### Make it repeatable {-}
-To find the root cause of an error, you’re going to need to execute the code many times as you consider and reject hypotheses. It’s worth some upfront investment to make the problem both easy and fast to reproduce.
-
-#### Figure out where it is {-}
-To find the bug, adopt the scientific method: **generate hypotheses**, **design experiments to test them**, and **record your results**. This may seem like a lot of work, but a systematic approach will end up saving you time.
-
-#### Fix it and test it {-}
-Once you’ve found the bug, you need to figure out how to fix it and to check that the fix actually worked. It’s very useful to have automated tests in place.
-
-## Locating errors {-}
-The most important tool for finding errors is `traceback()`, which shows you the sequence of calls (also known as the **call stack**) that lead to the error.
-
-- Here’s a simple example where `f()` calls `g()` calls `h()` calls `i()`, which checks if its argument is numeric:
-
-
-When we run `f("a")` code in RStudio we see:
-
-
-
-
-If you click **“Show traceback”** you see:
-
-
-
-You read the `traceback()` output from bottom to top: the initial call is `f()`, which calls `g()`, then `h()`, then `i()`, which triggers the error.
-
-## Lazy evaluation {-}
-One drawback to `traceback()` is that it always **linearises** the call tree, which can be confusing if there is much lazy evaluation involved. For example, take the following example where the error happens when evaluating the first argument to `f()`:
-
-
-
-
-
-Note: `rlang::with_abort()` is no longer an exported object from 'namespace:rlang'. There is an [open issue](https://github.com/hadley/adv-r/issues/1740) about a fix for the chapter but no drop-in replacement.
-
-
-## Interactive debugger {-}
-Enter the interactive debugger is wwith RStudio’s **“Rerun with Debug”** tool. This reruns the command that created the error, pausing execution where the error occurred. Otherwise, you can insert a call to `browser()` where you want to pause, and re-run the function.
-
-
-
-`browser()` is just a regular function call which means that you can run it conditionally by wrapping it in an `if` statement:
-
-
-
-
-
-
-## `browser()` commands {-}
-`browser()` provides a few special commands.
-
-
-
-- Next, `n`: executes the next step in the function.
-
-- Step into, or `s`: works like next, but if the next step is a function, it will step into that function so you can explore it interactively.
-
-- Finish, or `f`: finishes execution of the current loop or function.
-
-- Continue, `c`: leaves interactive debugging and continues regular execution of the function.
-- Stop, `Q`: stops debugging, terminates the function, and returns to the global workspace.
-
-
-## Alternatives {-}
-There are three alternatives to using `browser()`: setting breakpoints in RStudio, `options(error = recover)`, and `debug()` and other related functions.
-
-## Breakpoints {-}
-In RStudio, you can set a breakpoint by clicking to the left of the line number, or pressing **Shift + F9.** There are two small downsides to breakpoints:
-
-- There are a few unusual situations in which breakpoints will not work. [Read breakpoint troubleshooting for more details](https://support.posit.co/hc/en-us/articles/200534337-Breakpoint-Troubleshooting)
-
-- RStudio currently does not support conditional breakpoints.
-
-## `recover()` {-}
-When you set `options(error = recover)`, when you get an error, you’ll get an interactive prompt that displays the traceback and gives you the ability to interactively debug inside any of the frames:
-
-
-You can return to default error handling with `options(error = NULL)`.
-
-## `debug()` {-}
-
-Another approach is to call a function that inserts the `browser()` call:
-
-- `debug()` inserts a browser statement in the first line of the specified function. undebug() removes it.
-
-- `utils::setBreakpoint()` works similarly, but instead of taking a function name, it takes a file name and line number and finds the appropriate function for you.
-
-
-## Call stack {-}
-The call stacks printed by `traceback()`, `browser()` & `where`, and `recover()` are not consistent.
-
-
-
-RStudio displays calls in the same order as `traceback()`. rlang functions use the same ordering and numbering as `recover()`, but also use indenting to reinforce the hierarchy of calls.
-
-## Non-interactive debugging {-}
-
-When you can’t explore interactively...
-
-### `callr::r()` {-}
-
-`callr::r(f, list(1, 2))` calls `f(1, 2)` in a fresh session to help diagnose:
-
-- Is the global environment different? Have you loaded different packages? Are objects left from previous sessions causing differences?
-
-- Is the working directory different?
-
-- Is the `PATH` environment variable different?
-
-- Is the `R_LIBS` environment variable different?
-
-### `dump.frames()` {-}
-
-`dump.frames()` is the equivalent to `recover()` for non-interactive code.
-
-
-
-### Print debugging {-}
-
-Insert numerous print statements to precisely locate the problem, and see the values of important variables. Print debugging is particularly useful for compiled code.
-
-
-
-
-### RMarkdown {-}
-
-- If you’re knitting the file using RStudio, switch to calling `rmarkdown::render("path/to/file.Rmd")` instead to run the code in the current session.
-
-- For interactive debugging, you’ll need to call `sink()` in the error handler. For example, to use `recover()` with RMarkdown, you’d put the following code in your setup block:
-
-{height="110"}
-
-
-
-## Non-error failures {-}
-There are other ways for a function to fail apart from throwing an error:
-
-- A function may generate an unexpected warning. Convert warnings into errors with `options(warn = 2)` and use the the call stack.
-
-- A function may generate an unexpected message. The removal of `with_abort()` from {rlang} breaks this solution.
-
-- A function might never return.
-
-- The worst scenario is that your code might crash R completely, leaving you with no way to interactively debug your code. This indicates a bug in compiled (C or C++) code.
-
-## Link to some useful resources on debugging {-}
-
-- Jenny Bryan's ["Object of type closure is not subsettable"](https://github.com/jennybc/debugging#readme) talk from rstudio::conf 2020
-
-- Jenny Bryan and Jim Hester's book: ["What They Forgot to Teach You About R"](https://rstats.wtf/debugging-r) Ch12
-
-- Hadley's video on a [minimal reprex for a shiny app](https://www.youtube.com/watch?v=9w8ANOAlWy4)
-
-## Meeting Videos {-}
-
-### Cohort 1 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/ROMefwMuqXU")`
-
-### Cohort 2 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/N43p4txxxlY")`
-
-### Cohort 3 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/Jdb00nepeWQ")`
-
-### Cohort 4 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/tOql7ZD6P58")`
-
-### Cohort 5 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/EqsSWUQ6ZW0")`
-
-### Cohort 6 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/YvT-knh1baA")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:12:43 Trevin Flickinger: Hello everyone!
-00:13:03 Oluwafemi Oyedele: Hello, Good evening!!!
-00:22:10 Trevin Flickinger: My connection is slow so I’ll be in the chat
-00:32:45 Trevin Flickinger: If you start with “continue” it should error out after the first call
-00:56:18 Trevin Flickinger: Sys.frame(-1) shows it goes back one frame
-00:59:55 fg: thanks
-01:03:11 Arthur Shaw: Anyone else lose the presentation?
-01:03:20 fg: yes
-01:03:22 fg: ?
-01:04:26 Trevin Flickinger: I thought that was my internet connection
-01:05:07 Trevin Flickinger: Thank you!
-01:08:42 Trevin Flickinger: I need to use debug( ) more as well
-01:10:15 Trevin Flickinger: 21st works for me
-01:10:29 Oluwafemi Oyedele: Same here!!!
-```
-</details>
-
-### Cohort 7 {-}
-
-`r knitr::include_url("https://www.youtube.com/embed/T_uFW9xXoJk")`
diff --git a/slides/23.Rmd b/slides/23.Rmd
@@ -0,0 +1,190 @@
+---
+engine: knitr
+title: Measuring performance
+---
+
+## Learning objectives:
+
+- Understand how to improve your code for making it faster
+- Learn what are the tools for improving your code
+- Test how to profile your code
+
+
+## Introduction
+
+> "Before you can make your code faster, you first need to figure out what’s making it slow."
+
+
+```{r echo=FALSE, fig.align='center',fig.cap="SLOW DOWN TO LEARN HOW TO CODE FASTER | credits: packtpub.com"}
+knitr::include_graphics("images/23_code_faster.jpeg")
+```
+
+
+- **profile** your code: measure the run-time of each line of code using realistic inputs
+- **experiment** with alternatives to find faster code
+- **microbenchmark** to measure the difference in performance.
+
+
+
+## Profiling
+
+```{r message=FALSE, warning=FALSE, paged.print=FALSE}
+library(profvis)
+library(bench)
+```
+
+
+The tool to use is a **profiler**, it allows for **sampling** the code performance through stopping the execution of code every few milliseconds and recording all the steps.
+
+Example:
+
+```{r}
+f <- function() {
+ pause(0.1)
+ g()
+ h()
+}
+g <- function() {
+ pause(0.1)
+ h()
+}
+h <- function() {
+ pause(0.1)
+}
+```
+
+Profile the execution of f():
+
+ profvis::pause() is used instead of Sys.sleep()
+ profile f(), with utils::Rprof()
+
+```{r}
+tmp <- tempfile()
+Rprof(tmp, interval = 0.1)
+f()
+Rprof(NULL)
+writeLines(readLines(tmp))
+```
+
+
+**Visualising profiles**
+
+Makes easier to build up a mental model of what you need to change:
+
+ profvis::profvis()
+ utils::summaryRprof()
+
+```{r}
+source("scripts/profiling-example.R")
+profvis(f())
+```
+
+**Memory profiling and the garbage collector**
+
+Profiling a loop that modifies an existing variable:
+```{r}
+profvis::profvis({
+ x <- integer()
+for (i in 1:1e4) {
+ x <- c(x, i)
+}
+})
+```
+
+You can figure out what is the source of the problem by looking at the memory column. In this case, **copy-on-modify** acts in each iteration of the loop creating another copy of x.
+
+
+**Limitations**
+
+- Profiling does not extend to C code
+- Anonymous functions are hard to figure out
+- Arguments are evaluated inside another function
+
+
+### Exercise
+```{r eval=FALSE}
+profvis::profvis({
+ f <- function(n = 1e5) {
+ x <- rep(1, n)
+ rm(x)
+}
+},torture = TRUE)
+```
+
+ ?rm()
+
+[solution](https://advanced-r-solutions.rbind.io/measuring-performance.html)
+
+## Microbenchmarking
+
+
+*Measurement of the performance of a very small piece of code* is useful for comparing small snippets of code for specific tasks.
+
+```{r echo=FALSE, fig.align='center',fig.cap = "Credits: Google search-engine"}
+knitr::include_graphics("images/23_microbenchmarking.jpeg")
+```
+
+
+The {bench} package uses a high precision time.
+
+ bench::mark()
+
+
+```{r}
+library(bench)
+x <- runif(100)
+(lb <- bench::mark(
+ sqrt(x),
+ x ^ 0.5
+))
+```
+- heavily right-skewed distribution
+
+
+```{r}
+require(ggbeeswarm)
+plot(lb)
+```
+
+
+## Resources
+
+- [profvis package](https://rstudio.github.io/profvis/)
+- [bench package](https://cran.r-project.org/web/packages/bench/bench.pdf)
+- [solutions](https://advanced-r-solutions.rbind.io/measuring-performance.html)
+
+
+
+
+
+
+
+## Meeting Videos
+
+### Cohort 1
+
+(no video)
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/_zeLDufwTwY")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/Jdb00nepeWQ")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/sCso4FAF1DE")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/pOaiDK7J7EE")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/d_pzz_AsoRQ")`
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/4hngR1c9oP4")`
diff --git a/slides/23_Measuring_performance.Rmd b/slides/23_Measuring_performance.Rmd
@@ -1,187 +0,0 @@
-# Measuring performance
-
-**Learning objectives:**
-
-- Understand how to improve your code for making it faster
-- Learn what are the tools for improving your code
-- Test how to profile your code
-
-
-## Introduction
-
-> "Before you can make your code faster, you first need to figure out what’s making it slow."
-
-
-```{r echo=FALSE, fig.align='center',fig.cap="SLOW DOWN TO LEARN HOW TO CODE FASTER | credits: packtpub.com"}
-knitr::include_graphics("images/23_code_faster.jpeg")
-```
-
-
-- **profile** your code: measure the run-time of each line of code using realistic inputs
-- **experiment** with alternatives to find faster code
-- **microbenchmark** to measure the difference in performance.
-
-
-
-## Profiling
-
-```{r message=FALSE, warning=FALSE, paged.print=FALSE}
-library(profvis)
-library(bench)
-```
-
-
-The tool to use is a **profiler**, it allows for **sampling** the code performance through stopping the execution of code every few milliseconds and recording all the steps.
-
-Example:
-
-```{r}
-f <- function() {
- pause(0.1)
- g()
- h()
-}
-g <- function() {
- pause(0.1)
- h()
-}
-h <- function() {
- pause(0.1)
-}
-```
-
-Profile the execution of f():
-
- profvis::pause() is used instead of Sys.sleep()
- profile f(), with utils::Rprof()
-
-```{r}
-tmp <- tempfile()
-Rprof(tmp, interval = 0.1)
-f()
-Rprof(NULL)
-writeLines(readLines(tmp))
-```
-
-
-**Visualising profiles**
-
-Makes easier to build up a mental model of what you need to change:
-
- profvis::profvis()
- utils::summaryRprof()
-
-```{r}
-source("scripts/profiling-example.R")
-profvis(f())
-```
-
-**Memory profiling and the garbage collector**
-
-Profiling a loop that modifies an existing variable:
-```{r}
-profvis::profvis({
- x <- integer()
-for (i in 1:1e4) {
- x <- c(x, i)
-}
-})
-```
-
-You can figure out what is the source of the problem by looking at the memory column. In this case, **copy-on-modify** acts in each iteration of the loop creating another copy of x.
-
-
-**Limitations**
-
-- Profiling does not extend to C code
-- Anonymous functions are hard to figure out
-- Arguments are evaluated inside another function
-
-
-### Exercise
-```{r eval=FALSE}
-profvis::profvis({
- f <- function(n = 1e5) {
- x <- rep(1, n)
- rm(x)
-}
-},torture = TRUE)
-```
-
- ?rm()
-
-[solution](https://advanced-r-solutions.rbind.io/measuring-performance.html)
-
-## Microbenchmarking
-
-
-*Measurement of the performance of a very small piece of code* is useful for comparing small snippets of code for specific tasks.
-
-```{r echo=FALSE, fig.align='center',fig.cap = "Credits: Google search-engine"}
-knitr::include_graphics("images/23_microbenchmarking.jpeg")
-```
-
-
-The {bench} package uses a high precision time.
-
- bench::mark()
-
-
-```{r}
-library(bench)
-x <- runif(100)
-(lb <- bench::mark(
- sqrt(x),
- x ^ 0.5
-))
-```
-- heavily right-skewed distribution
-
-
-```{r}
-require(ggbeeswarm)
-plot(lb)
-```
-
-
-## Resources
-
-- [profvis package](https://rstudio.github.io/profvis/)
-- [bench package](https://cran.r-project.org/web/packages/bench/bench.pdf)
-- [solutions](https://advanced-r-solutions.rbind.io/measuring-performance.html)
-
-
-
-
-
-
-
-## Meeting Videos
-
-### Cohort 1
-
-(no video)
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/_zeLDufwTwY")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/Jdb00nepeWQ")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/sCso4FAF1DE")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/pOaiDK7J7EE")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/d_pzz_AsoRQ")`
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/4hngR1c9oP4")`
diff --git a/slides/24.Rmd b/slides/24.Rmd
@@ -0,0 +1,292 @@
+---
+engine: knitr
+title: Improving performance
+---
+
+## Overview
+
+1. Code organization
+2. Check for existing solutions
+3. Do as little as possible
+4. Vectorise
+5. Avoid Copies
+
+## Organizing code
+
+- Write a function for each approach
+```{r}
+mean1 <- function(x) mean(x)
+mean2 <- function(x) sum(x) / length(x)
+```
+- Keep old functions that you've tried, even the failures
+- Generate a representative test case
+```{r}
+x <- runif(1e5)
+```
+- Use `bench::mark` to compare the different versions (and include unit tests)
+```{r}
+bench::mark(
+ mean1(x),
+ mean2(x)
+)[c("expression", "min", "median", "itr/sec", "n_gc")]
+```
+
+## Check for Existing Solution
+- CRAN task views (http://cran.rstudio.com/web/views/)
+- Reverse dependencies of Rcpp (https://cran.r-project.org/web/packages/Rcpp/)
+- Talk to others!
+ - Google (rseek)
+ - Stackoverflow ([R])
+ - https://community.rstudio.com/
+ - DSLC community
+
+## Do as little as possible
+- use a function tailored to a more specific type of input or output, or to a more specific problem
+ - `rowSums()`, `colSums()`, `rowMeans()`, and `colMeans()` are faster than equivalent invocations that use `apply()` because they are vectorised
+ - `vapply()` is faster than `sapply()` because it pre-specifies the output type
+ - `any(x == 10)` is much faster than `10 %in% x` because testing equality is simpler than testing set inclusion
+- Some functions coerce their inputs into a specific type. If your input is not the right type, the function has to do extra work
+ - e.g. `apply()` will always turn a dataframe into a matrix
+- Other examples
+ - `read.csv()`: specify known column types with `colClasses`. (Also consider
+ switching to `readr::read_csv()` or `data.table::fread()` which are
+ considerably faster than `read.csv()`.)
+
+ - `factor()`: specify known levels with `levels`.
+
+ - `cut()`: don't generate labels with `labels = FALSE` if you don't need them,
+ or, even better, use `findInterval()` as mentioned in the "see also" section
+ of the documentation.
+
+ - `unlist(x, use.names = FALSE)` is much faster than `unlist(x)`.
+
+ - `interaction()`: if you only need combinations that exist in the data, use
+ `drop = TRUE`.
+
+## Avoiding Method Dispatch
+```{r}
+x <- runif(1e2)
+bench::mark(
+ mean(x),
+ mean.default(x)
+)[c("expression", "min", "median", "itr/sec", "n_gc")]
+```
+
+```{r}
+x <- runif(1e2)
+bench::mark(
+ mean(x),
+ mean.default(x),
+ .Internal(mean(x))
+)[c("expression", "min", "median", "itr/sec", "n_gc")]
+```
+
+```{r}
+x <- runif(1e4)
+bench::mark(
+ mean(x),
+ mean.default(x),
+ .Internal(mean(x))
+)[c("expression", "min", "median", "itr/sec", "n_gc")]
+```
+
+## Avoiding Input Coercion
+- `as.data.frame()` is quite slow because it coerces each element into a data frame and then `rbind()`s them together
+- instead, if you have a named list with vectors of equal length, you can directly transform it into a data frame
+
+```{r}
+quickdf <- function(l) {
+ class(l) <- "data.frame"
+ attr(l, "row.names") <- .set_row_names(length(l[[1]]))
+ l
+}
+l <- lapply(1:26, function(i) runif(1e3))
+names(l) <- letters
+bench::mark(
+ as.data.frame = as.data.frame(l),
+ quick_df = quickdf(l)
+)[c("expression", "min", "median", "itr/sec", "n_gc")]
+```
+
+*Caveat!* This method is fast because it's dangerous!
+
+## Vectorise
+- vectorisation means finding the existing R function that is implemented in C and most closely applies to your problem
+- Vectorised functions that apply to many scenarios
+ - `rowSums()`, `colSums()`, `rowMeans()`, and `colMeans()`
+ - Vectorised subsetting can lead to big improvements in speed
+ - `cut()` and `findInterval()` for converting continuous variables to categorical
+ - Be aware of vectorised functions like `cumsum()` and `diff()`
+ - Matrix algebra is a general example of vectorisation
+
+## Avoiding copies
+
+- Whenever you use c(), append(), cbind(), rbind(), or paste() to create a bigger object, R must first allocate space for the new object and then copy the old object to its new home.
+
+```{r}
+random_string <- function() {
+ paste(sample(letters, 50, replace = TRUE), collapse = "")
+}
+strings10 <- replicate(10, random_string())
+strings100 <- replicate(100, random_string())
+collapse <- function(xs) {
+ out <- ""
+ for (x in xs) {
+ out <- paste0(out, x)
+ }
+ out
+}
+bench::mark(
+ loop10 = collapse(strings10),
+ loop100 = collapse(strings100),
+ vec10 = paste(strings10, collapse = ""),
+ vec100 = paste(strings100, collapse = ""),
+ check = FALSE
+)[c("expression", "min", "median", "itr/sec", "n_gc")]
+```
+
+## Case study: t-test
+
+```{r}
+m <- 1000
+n <- 50
+X <- matrix(rnorm(m * n, mean = 10, sd = 3), nrow = m)
+grp <- rep(1:2, each = n / 2)
+```
+
+```{r}
+# formula interface
+system.time(
+ for (i in 1:m) {
+ t.test(X[i, ] ~ grp)$statistic
+ }
+)
+# provide two vectors
+system.time(
+ for (i in 1:m) {
+ t.test(X[i, grp == 1], X[i, grp == 2])$statistic
+ }
+)
+```
+
+Add functionality to save values
+
+```{r}
+compT <- function(i){
+ t.test(X[i, grp == 1], X[i, grp == 2])$statistic
+}
+system.time(t1 <- purrr::map_dbl(1:m, compT))
+```
+
+If you look at the source code of `stats:::t.test.default()`, you’ll see that it does a lot more than just compute the t-statistic.
+
+```{r}
+# Do less work
+my_t <- function(x, grp) {
+ t_stat <- function(x) {
+ m <- mean(x)
+ n <- length(x)
+ var <- sum((x - m) ^ 2) / (n - 1)
+ list(m = m, n = n, var = var)
+ }
+ g1 <- t_stat(x[grp == 1])
+ g2 <- t_stat(x[grp == 2])
+ se_total <- sqrt(g1$var / g1$n + g2$var / g2$n)
+ (g1$m - g2$m) / se_total
+}
+system.time(t2 <- purrr::map_dbl(1:m, ~ my_t(X[.,], grp)))
+stopifnot(all.equal(t1, t2))
+```
+
+This gives us a six-fold speed improvement!
+
+```{r}
+# Vectorise it
+rowtstat <- function(X, grp){
+ t_stat <- function(X) {
+ m <- rowMeans(X)
+ n <- ncol(X)
+ var <- rowSums((X - m) ^ 2) / (n - 1)
+ list(m = m, n = n, var = var)
+ }
+ g1 <- t_stat(X[, grp == 1])
+ g2 <- t_stat(X[, grp == 2])
+ se_total <- sqrt(g1$var / g1$n + g2$var / g2$n)
+ (g1$m - g2$m) / se_total
+}
+system.time(t3 <- rowtstat(X, grp))
+stopifnot(all.equal(t1, t3))
+```
+
+1000 times faster than when we started!
+
+## Other techniques
+* [Read R blogs](http://www.r-bloggers.com/) to see what performance
+ problems other people have struggled with, and how they have made their
+ code faster.
+
+* Read other R programming books, like The Art of R Programming or Patrick Burns'
+ [_R Inferno_](http://www.burns-stat.com/documents/books/the-r-inferno/) to
+ learn about common traps.
+
+* Take an algorithms and data structure course to learn some
+ well known ways of tackling certain classes of problems. I have heard
+ good things about Princeton's
+ [Algorithms course](https://www.coursera.org/course/algs4partI) offered on
+ Coursera.
+
+* Learn how to parallelise your code. Two places to start are
+ Parallel R and Parallel Computing for Data Science
+
+* Read general books about optimisation like Mature optimisation
+ or the Pragmatic Programmer
+
+* Read more R code. StackOverflow, R Mailing List, DSLC, GitHub, etc.
+
+## Meeting Videos
+
+### Cohort 1
+
+(no video)
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/fSdAqlkeq6I")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/yCkvUcT7wW8")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/LCaqvuv3JNg")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/pOaiDK7J7EE")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/UaXimKd3vg8")`
+
+<details>
+<summary> Meeting chat log </summary>
+
+```
+00:24:42 Arthur Shaw: I wonder if there's a task view for R Universe: https://r-universe.dev/search/
+01:01:13 Arthur Shaw: https://www.alexejgossmann.com/benchmarking_r/
+01:04:34 Trevin: I agree that the chapter is a good jumping off point. Gonna have to dig into some of the listed resources 😄
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/rOkrHvN8Uqg")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:23:48 Ron Legere: https://www.mathworks.com/help/matlab/matlab_prog/vectorization.html
+```
+</details>
diff --git a/slides/24_Improving_performance.Rmd b/slides/24_Improving_performance.Rmd
@@ -1,290 +0,0 @@
-# Improving performance
-
-
-## Overview
-
-1. Code organization
-2. Check for existing solutions
-3. Do as little as possible
-4. Vectorise
-5. Avoid Copies
-
-## Organizing code
-
-- Write a function for each approach
-```{r}
-mean1 <- function(x) mean(x)
-mean2 <- function(x) sum(x) / length(x)
-```
-- Keep old functions that you've tried, even the failures
-- Generate a representative test case
-```{r}
-x <- runif(1e5)
-```
-- Use `bench::mark` to compare the different versions (and include unit tests)
-```{r}
-bench::mark(
- mean1(x),
- mean2(x)
-)[c("expression", "min", "median", "itr/sec", "n_gc")]
-```
-
-## Check for Existing Solution
-- CRAN task views (http://cran.rstudio.com/web/views/)
-- Reverse dependencies of Rcpp (https://cran.r-project.org/web/packages/Rcpp/)
-- Talk to others!
- - Google (rseek)
- - Stackoverflow ([R])
- - https://community.rstudio.com/
- - DSLC community
-
-## Do as little as possible
-- use a function tailored to a more specific type of input or output, or to a more specific problem
- - `rowSums()`, `colSums()`, `rowMeans()`, and `colMeans()` are faster than equivalent invocations that use `apply()` because they are vectorised
- - `vapply()` is faster than `sapply()` because it pre-specifies the output type
- - `any(x == 10)` is much faster than `10 %in% x` because testing equality is simpler than testing set inclusion
-- Some functions coerce their inputs into a specific type. If your input is not the right type, the function has to do extra work
- - e.g. `apply()` will always turn a dataframe into a matrix
-- Other examples
- - `read.csv()`: specify known column types with `colClasses`. (Also consider
- switching to `readr::read_csv()` or `data.table::fread()` which are
- considerably faster than `read.csv()`.)
-
- - `factor()`: specify known levels with `levels`.
-
- - `cut()`: don't generate labels with `labels = FALSE` if you don't need them,
- or, even better, use `findInterval()` as mentioned in the "see also" section
- of the documentation.
-
- - `unlist(x, use.names = FALSE)` is much faster than `unlist(x)`.
-
- - `interaction()`: if you only need combinations that exist in the data, use
- `drop = TRUE`.
-
-## Avoiding Method Dispatch
-```{r}
-x <- runif(1e2)
-bench::mark(
- mean(x),
- mean.default(x)
-)[c("expression", "min", "median", "itr/sec", "n_gc")]
-```
-
-```{r}
-x <- runif(1e2)
-bench::mark(
- mean(x),
- mean.default(x),
- .Internal(mean(x))
-)[c("expression", "min", "median", "itr/sec", "n_gc")]
-```
-
-```{r}
-x <- runif(1e4)
-bench::mark(
- mean(x),
- mean.default(x),
- .Internal(mean(x))
-)[c("expression", "min", "median", "itr/sec", "n_gc")]
-```
-
-## Avoiding Input Coercion
-- `as.data.frame()` is quite slow because it coerces each element into a data frame and then `rbind()`s them together
-- instead, if you have a named list with vectors of equal length, you can directly transform it into a data frame
-
-```{r}
-quickdf <- function(l) {
- class(l) <- "data.frame"
- attr(l, "row.names") <- .set_row_names(length(l[[1]]))
- l
-}
-l <- lapply(1:26, function(i) runif(1e3))
-names(l) <- letters
-bench::mark(
- as.data.frame = as.data.frame(l),
- quick_df = quickdf(l)
-)[c("expression", "min", "median", "itr/sec", "n_gc")]
-```
-
-*Caveat!* This method is fast because it's dangerous!
-
-## Vectorise
-- vectorisation means finding the existing R function that is implemented in C and most closely applies to your problem
-- Vectorised functions that apply to many scenarios
- - `rowSums()`, `colSums()`, `rowMeans()`, and `colMeans()`
- - Vectorised subsetting can lead to big improvements in speed
- - `cut()` and `findInterval()` for converting continuous variables to categorical
- - Be aware of vectorised functions like `cumsum()` and `diff()`
- - Matrix algebra is a general example of vectorisation
-
-## Avoiding copies
-
-- Whenever you use c(), append(), cbind(), rbind(), or paste() to create a bigger object, R must first allocate space for the new object and then copy the old object to its new home.
-
-```{r}
-random_string <- function() {
- paste(sample(letters, 50, replace = TRUE), collapse = "")
-}
-strings10 <- replicate(10, random_string())
-strings100 <- replicate(100, random_string())
-collapse <- function(xs) {
- out <- ""
- for (x in xs) {
- out <- paste0(out, x)
- }
- out
-}
-bench::mark(
- loop10 = collapse(strings10),
- loop100 = collapse(strings100),
- vec10 = paste(strings10, collapse = ""),
- vec100 = paste(strings100, collapse = ""),
- check = FALSE
-)[c("expression", "min", "median", "itr/sec", "n_gc")]
-```
-
-## Case study: t-test
-
-```{r}
-m <- 1000
-n <- 50
-X <- matrix(rnorm(m * n, mean = 10, sd = 3), nrow = m)
-grp <- rep(1:2, each = n / 2)
-```
-
-```{r}
-# formula interface
-system.time(
- for (i in 1:m) {
- t.test(X[i, ] ~ grp)$statistic
- }
-)
-# provide two vectors
-system.time(
- for (i in 1:m) {
- t.test(X[i, grp == 1], X[i, grp == 2])$statistic
- }
-)
-```
-
-Add functionality to save values
-
-```{r}
-compT <- function(i){
- t.test(X[i, grp == 1], X[i, grp == 2])$statistic
-}
-system.time(t1 <- purrr::map_dbl(1:m, compT))
-```
-
-If you look at the source code of `stats:::t.test.default()`, you’ll see that it does a lot more than just compute the t-statistic.
-
-```{r}
-# Do less work
-my_t <- function(x, grp) {
- t_stat <- function(x) {
- m <- mean(x)
- n <- length(x)
- var <- sum((x - m) ^ 2) / (n - 1)
- list(m = m, n = n, var = var)
- }
- g1 <- t_stat(x[grp == 1])
- g2 <- t_stat(x[grp == 2])
- se_total <- sqrt(g1$var / g1$n + g2$var / g2$n)
- (g1$m - g2$m) / se_total
-}
-system.time(t2 <- purrr::map_dbl(1:m, ~ my_t(X[.,], grp)))
-stopifnot(all.equal(t1, t2))
-```
-
-This gives us a six-fold speed improvement!
-
-```{r}
-# Vectorise it
-rowtstat <- function(X, grp){
- t_stat <- function(X) {
- m <- rowMeans(X)
- n <- ncol(X)
- var <- rowSums((X - m) ^ 2) / (n - 1)
- list(m = m, n = n, var = var)
- }
- g1 <- t_stat(X[, grp == 1])
- g2 <- t_stat(X[, grp == 2])
- se_total <- sqrt(g1$var / g1$n + g2$var / g2$n)
- (g1$m - g2$m) / se_total
-}
-system.time(t3 <- rowtstat(X, grp))
-stopifnot(all.equal(t1, t3))
-```
-
-1000 times faster than when we started!
-
-## Other techniques
-* [Read R blogs](http://www.r-bloggers.com/) to see what performance
- problems other people have struggled with, and how they have made their
- code faster.
-
-* Read other R programming books, like The Art of R Programming or Patrick Burns'
- [_R Inferno_](http://www.burns-stat.com/documents/books/the-r-inferno/) to
- learn about common traps.
-
-* Take an algorithms and data structure course to learn some
- well known ways of tackling certain classes of problems. I have heard
- good things about Princeton's
- [Algorithms course](https://www.coursera.org/course/algs4partI) offered on
- Coursera.
-
-* Learn how to parallelise your code. Two places to start are
- Parallel R and Parallel Computing for Data Science
-
-* Read general books about optimisation like Mature optimisation
- or the Pragmatic Programmer
-
-* Read more R code. StackOverflow, R Mailing List, DSLC, GitHub, etc.
-
-## Meeting Videos
-
-### Cohort 1
-
-(no video)
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/fSdAqlkeq6I")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/yCkvUcT7wW8")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/LCaqvuv3JNg")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/pOaiDK7J7EE")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/UaXimKd3vg8")`
-
-<details>
-<summary> Meeting chat log </summary>
-
-```
-00:24:42 Arthur Shaw: I wonder if there's a task view for R Universe: https://r-universe.dev/search/
-01:01:13 Arthur Shaw: https://www.alexejgossmann.com/benchmarking_r/
-01:04:34 Trevin: I agree that the chapter is a good jumping off point. Gonna have to dig into some of the listed resources 😄
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/rOkrHvN8Uqg")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:23:48 Ron Legere: https://www.mathworks.com/help/matlab/matlab_prog/vectorization.html
-```
-</details>
diff --git a/slides/25.Rmd b/slides/25.Rmd
@@ -0,0 +1,711 @@
+---
+engine: knitr
+title: Rewriting R code in C++
+---
+
+## Learning objectives:
+
+- Learn to improve performance by rewriting bottlenecks in C++
+
+- Introduction to the [{Rcpp} package](https://www.rcpp.org/)
+
+## Introduction
+
+In this chapter we'll learn how to rewrite **R** code in **C++** to make it faster using the **Rcpp package**. The **Rcpp** package makes it simple to connect C++ to R! With C++ you can fix:
+
+- Loops that can't be easily vectorised because subsequent iterations depend on previous ones.
+
+- Recursive functions, or problems which involve calling functions millions of times. The overhead of calling a function in C++ is much lower than in R.
+
+- Problems that require advanced data structures and algorithms that R doesn't provide. Through the **standard template library (STL)**, C++ has efficient implementations of many important data structures, from ordered maps to double-ended queue
+
+<center>Like how?</center>
+
+<center> </center>
+
+<center></center>
+
+
+
+## Getting started with C++
+
+```{r warning=FALSE}
+library(Rcpp)
+```
+
+Install a C++ compiler:
+
+- Rtools, on Windows
+- Xcode, on Mac
+- Sudo apt-get install r-base-dev or similar, on Linux.
+
+
+### First example {-}
+
+Rcpp compiling the C++ code:
+
+```{r}
+cppFunction('int add(int x, int y, int z) {
+ int sum = x + y + z;
+ return sum;
+}')
+# add works like a regular R function
+add
+
+add(1, 2, 3)
+```
+
+Some things to note:
+
+
+- The syntax to create a function is different.
+- Types of inputs and outputs must be explicitly declared
+- Use = for assignment, not `<-`.
+- Every statement is terminated by a ;
+- C++ has it's own name for the types we are used to:
+ - scalar types are `int`, `double`, `bool` and `String`
+ - vector types (for Rcpp) are `IntegerVector`, `NumericVector`, `LogicalVector` and `CharacterVector`
+ - Other R types are available in C++: `List`, `Function`, `DataFrame`, and more.
+
+- Explicitly use a `return` statement to return a value from a function.
+
+
+
+## Example with scalar input and output {-}
+
+```{r}
+signR <- function(x) {
+ if (x > 0) {
+ 1
+ } else if (x == 0) {
+ 0
+ } else {
+ -1
+ }
+}
+
+a <- -0.5
+b <- 0.5
+c <- 0
+signR(c)
+```
+
+Translation:
+
+```{r}
+cppFunction('int signC(int x) {
+ if (x > 0) {
+ return 1;
+ } else if (x == 0) {
+ return 0;
+ } else {
+ return -1;
+ }
+}')
+```
+
+* Note that the `if` syntax is identical! Not everything is different!
+
+## Vector Input, Scalar output:{-}
+
+```{r}
+sumR <- function(x) {
+ total <- 0
+ for (i in seq_along(x)) {
+ total <- total + x[i]
+ }
+ total
+}
+
+x<- runif(100)
+sumR(x)
+```
+
+Translation:
+
+```{r}
+cppFunction('double sumC(NumericVector x) {
+ int n = x.size();
+ double total = 0;
+ for(int i = 0; i < n; ++i) {
+ total += x[i];
+ }
+ return total;
+}')
+```
+
+Some observations:
+
+- vector indices *start at 0*
+- The for statement has a different syntax: for(init; check; increment)
+- Methods are called with `.`
+- `total += x[i]` is equivalent to `total = total + x[i]`.
+- other in-place operators are `-=`, `*=`, `and /=`
+
+
+To check for the fastest way we can use:
+
+```{r eval=FALSE}
+?bench::mark
+```
+
+```{r}
+x <- runif(1e3)
+bench::mark(
+ sum(x),
+ sumC(x),
+ sumR(x)
+)
+```
+
+## Vector input and output {-}
+
+```{r}
+pdistR <- function(x, ys) {
+ sqrt((x - ys) ^ 2)
+}
+```
+
+```{r}
+cppFunction('NumericVector pdistC(double x, NumericVector ys) {
+ int n = ys.size();
+ NumericVector out(n);
+
+ for(int i = 0; i < n; ++i) {
+ out[i] = sqrt(pow(ys[i] - x, 2.0));
+ }
+ return out;
+}')
+```
+
+Note: uses `pow()`, not `^`, for exponentiation
+
+```{r}
+y <- runif(1e6)
+bench::mark(
+ pdistR(0.5, y),
+ pdistC(0.5, y)
+)[1:6]
+```
+
+## Source your C++ code {-}
+
+Source stand-alone C++ files into R using `sourceCpp()`
+
+
+C++ files have extension `.cpp`
+
+```
+#include <Rcpp.h>
+using namespace Rcpp;
+```
+
+And for each function that you want available within R, you need to prefix it with:
+
+```
+// [[Rcpp::export]]
+```
+
+Inside a cpp file you can include `R` code using special comments
+
+```
+/*** R
+rcode here
+*/
+```
+
+
+
+### Example {-}
+
+This block in Rmarkdown uses `{Rcpp}` as a short hand for engine = "Rcpp".
+
+```{Rcpp}
+#include <Rcpp.h>
+using namespace Rcpp;
+
+// [[Rcpp::export]]
+double meanC(NumericVector x) {
+ int n = x.size();
+ double total = 0;
+
+ for(int i = 0; i < n; ++i) {
+ total += x[i];
+ }
+ return total / n;
+}
+
+/*** R
+x <- runif(1e5)
+bench::mark(
+ mean(x),
+ meanC(x)
+)
+*/
+```
+
+NOTE: For some reason although the r code above runs, `knit` doesn't include the output. Why?
+
+```{r}
+x <- runif(1e5)
+bench::mark(
+ mean(x),
+ meanC(x)
+)
+```
+
+
+
+## Data frames, functions, and attributes
+
+### Lists and Dataframes {-}
+
+Contrived example to illustrate how to access a dataframe from c++:
+
+```{Rcpp}
+#include <Rcpp.h>
+using namespace Rcpp;
+
+// [[Rcpp::export]]
+double mpe(List mod) {
+ if (!mod.inherits("lm")) stop("Input must be a linear model");
+
+ NumericVector resid = as<NumericVector>(mod["residuals"]);
+ NumericVector fitted = as<NumericVector>(mod["fitted.values"]);
+
+ int n = resid.size();
+ double err = 0;
+ for(int i = 0; i < n; ++i) {
+ err += resid[i] / (fitted[i] + resid[i]);
+ }
+ return err / n;
+}
+```
+
+```{r}
+mod <- lm(mpg ~ wt, data = mtcars)
+mpe(mod)
+```
+
+- Note that you must *cast* the values to the required type. C++ needs to know the types in advance.
+
+### Functions {-}
+
+```{Rcpp}
+#include <Rcpp.h>
+using namespace Rcpp;
+
+// [[Rcpp::export]]
+RObject callWithOne(Function f) {
+ return f(1);
+}
+```
+
+
+```{r}
+callWithOne(function(x) x + 1)
+```
+
+
+* Other values can be accessed from c++ including
+
+ * attributes (use: `.attr()`. Also `.names()` is alias for name attribute.
+ * `Environment`, `DottedPair`, `Language`, `Symbol` , etc.
+
+## Missing values
+
+### Missing values behave differently for C++ scalers{-}
+
+* Scalar NA's in Cpp : `NA_LOGICAL`, `NA_INTEGER`, `NA_REAL`, `NA_STRING`.
+
+* Integers (`int`) stores R NA's as the smallest integer. Better to use length 1 `IntegerVector`
+* Doubles use IEEE 754 NaN , which behaves a bit differently for logical expressions (but ok for math expressions).
+
+```{r}
+evalCpp("NA_REAL || FALSE")
+```
+
+* Strings are a class from Rcpp, so they handle missing values fine.
+
+* `bool` can only hold two values, so be careful. Consider using vectors of length 1 or coercing to `int`
+
+
+### Vectors
+
+* Vectors are all type introduced by RCpp and know how to handle missing values if you use the specific type for that vector.
+
+```{Rcpp}
+#include <Rcpp.h>
+using namespace Rcpp;
+
+// [[Rcpp::export]]
+List missing_sampler() {
+ return List::create(
+ NumericVector::create(NA_REAL),
+ IntegerVector::create(NA_INTEGER),
+ LogicalVector::create(NA_LOGICAL),
+ CharacterVector::create(NA_STRING)
+ );
+}
+```
+
+```{r}
+str(missing_sampler())
+```
+
+## Standard Template Library
+
+STL provides powerful data structures and algorithms for C++.
+
+### Iterators {-}
+
+Iterators are used extensively in the STL to abstract away details of underlying data structures.
+
+If you an iterator `it`, you can:
+
+- Get the value by 'dereferencing' with `*it`
+- Advance to the next value with `++it`
+- Compare iterators (locations) with `==`
+
+
+### Algorithms {-}
+
+* The real power of iterators comes from using them with STL algorithms.
+
+* A good reference is [https://en.cppreference.com/w/cpp/algorithm]
+
+* Book provides examples using `accumulate` and `upper_buond`
+
+* Another Example:
+
+```{Rcpp}
+
+#include <algorithm>
+#include <Rcpp.h>
+
+using namespace Rcpp;
+
+
+// Explicit iterator version
+
+// [[Rcpp::export]]
+NumericVector square_C_it(NumericVector x){
+ NumericVector out(x.size());
+ // Each container has its own iterator type
+ NumericVector::iterator in_it;
+ NumericVector::iterator out_it;
+
+ for(in_it = x.begin(), out_it = out.begin(); in_it != x.end(); ++in_it, ++out_it) {
+ *out_it = pow(*in_it,2);
+ }
+
+ return out;
+
+}
+
+
+// Use algorithm 'transform'
+
+// [[Rcpp::export]]
+NumericVector square_C(NumericVector x) {
+
+ NumericVector out(x.size());
+
+
+ std::transform(x.begin(),x.end(), out.begin(),
+ [](double v) -> double { return v*v; });
+ return out;
+}
+```
+
+```{r}
+square_C(c(1.0,2.0,3.0))
+```
+```{r}
+square_C_it(c(1.0,2.0,3.0))
+```
+
+## Data Structures {-}
+
+STL provides a large set of data structures. Some of the most important:
+
+* `std::vector` - like an `R` vector, except knows how to grow efficiently
+
+* `std::unordered_set` - unique set of values. Ordered version `std::set`. Unordered is more efficient.
+
+* `std::map` - Moslty similar to `R` lists, provide an association between a key and a value. There is also an unordered version.
+
+A quick example illustrating the `map`:
+
+```{Rcpp}
+#include <Rcpp.h>
+using namespace Rcpp;
+
+// [[Rcpp::export]]
+std::map<double, int> tableC(NumericVector x) {
+ // Note the types are <key, value>
+ std::map<double, int> counts;
+
+ int n = x.size();
+ for (int i = 0; i < n; i++) {
+ counts[x[i]]++;
+ }
+
+ return counts;
+}
+```
+
+
+```{r}
+res = tableC(c(1,1,2,1,4,5))
+res
+```
+
+* Note that the map is converted to a named vector in this case on return
+
+
+To learn more about the STL data structures see [containers](https://en.cppreference.com/w/cpp/container) at `cppreference`
+
+## Case Studies
+
+
+
+Real life uses of C++ to replace slow R code.
+
+
+## Case study 1: Gibbs sampler {-}
+
+The [Gibbs sampler](https://en.wikipedia.org/wiki/Gibbs_sampling) is a method for estimating parameters expectations. It is a **MCMC algorithm** that has been adapted to sample from multidimensional target distributions. Gibbs sampling generates a **Markov chain** of samples, each of which is correlated with nearby samples.
+
+[Example blogged by Dirk Eddelbuettel](https://dirk.eddelbuettel.com/blog/2011/07/14/), the R and C++ code is very similar but runs about 20 times faster.
+
+> "Darren Wilkinson stresses the rather pragmatic aspects of how fast and/or easy it is to write the code, rather than just the mere runtime.
+
+
+<center></center>
+
+
+R code:
+
+```{r}
+gibbs_r <- function(N, thin) {
+ mat <- matrix(nrow = N, ncol = 2)
+ x <- y <- 0
+
+ for (i in 1:N) {
+ for (j in 1:thin) {
+ x <- rgamma(1, 3, y * y + 4)
+ y <- rnorm(1, 1 / (x + 1), 1 / sqrt(2 * (x + 1)))
+ }
+ mat[i, ] <- c(x, y)
+ }
+ mat
+}
+```
+
+Actions to convert R to C++:
+
+- Add type declarations to all variables
+- Use `(` instead of `[` to index into the matrix
+- Subscript the results of `rgamma` and `rnorm` to convert from a vector into a scalar.
+
+```{Rcpp}
+#include <Rcpp.h>
+using namespace Rcpp;
+
+// [[Rcpp::export]]
+NumericMatrix gibbs_cpp(int N, int thin) {
+ NumericMatrix mat(N, 2);
+ double x = 0, y = 0;
+
+ for(int i = 0; i < N; i++) {
+ for(int j = 0; j < thin; j++) {
+ x = rgamma(1, 3, 1 / (y * y + 4))[0];
+ y = rnorm(1, 1 / (x + 1), 1 / sqrt(2 * (x + 1)))[0];
+ }
+ mat(i, 0) = x;
+ mat(i, 1) = y;
+ }
+
+ return(mat);
+}
+```
+
+Checking who's best:
+
+```{r}
+bench::mark(
+ gibbs_r(100, 10),
+ gibbs_cpp(100, 10),
+ check = FALSE
+)
+```
+
+## Case study 2: predict a model response from three inputs {-}
+
+[Rcpp is smoking fast for agent based models in data frames](https://gweissman.github.io/post/rcpp-is-smoking-fast-for-agent-based-models-in-data-frames/) by Gary Weissman, MD, MSHP.
+
+Starts with this code:
+
+```{r}
+vacc1a <- function(age, female, ily) {
+ p <- 0.25 + 0.3 * 1 / (1 - exp(0.04 * age)) + 0.1 * ily
+ p <- p * if (female) 1.25 else 0.75
+ p <- max(0, p)
+ p <- min(1, p)
+ p
+}
+```
+
+R code with a for loop:
+
+```{r}
+vacc1 <- function(age, female, ily) {
+ n <- length(age)
+ out <- numeric(n)
+ for (i in seq_len(n)) {
+ out[i] <- vacc1a(age[i], female[i], ily[i])
+ }
+ out
+}
+```
+
+Vectorized R code:
+
+```{r}
+vacc2 <- function(age, female, ily) {
+ p <- 0.25 + 0.3 * 1 / (1 - exp(0.04 * age)) + 0.1 * ily
+ p <- p * ifelse(female, 1.25, 0.75)
+ p <- pmax(0, p)
+ p <- pmin(1, p)
+ p
+}
+```
+
+C++:
+
+```{Rcpp}
+#include <Rcpp.h>
+using namespace Rcpp;
+
+double vacc3a(double age, bool female, bool ily){
+ double p = 0.25 + 0.3 * 1 / (1 - exp(0.04 * age)) + 0.1 * ily;
+ p = p * (female ? 1.25 : 0.75);
+ p = std::max(p, 0.0);
+ p = std::min(p, 1.0);
+ return p;
+}
+
+// [[Rcpp::export]]
+NumericVector vacc3(NumericVector age, LogicalVector female,
+ LogicalVector ily) {
+ int n = age.size();
+ NumericVector out(n);
+
+ for(int i = 0; i < n; ++i) {
+ out[i] = vacc3a(age[i], female[i], ily[i]);
+ }
+
+ return out;
+}
+```
+
+Sample data:
+
+```{r}
+n <- 1000
+age <- rnorm(n, mean = 50, sd = 10)
+female <- sample(c(T, F), n, rep = TRUE)
+ily <- sample(c(T, F), n, prob = c(0.8, 0.2), rep = TRUE)
+
+stopifnot(
+ all.equal(vacc1(age, female, ily), vacc2(age, female, ily)),
+ all.equal(vacc1(age, female, ily), vacc3(age, female, ily))
+)
+```
+
+<center>**Who's faster?**</center>
+<center></center>
+
+```{r}
+bench::mark(
+ vacc1 = vacc1(age, female, ily),
+ vacc2 = vacc2(age, female, ily),
+ vacc3 = vacc3(age, female, ily)
+)
+```
+
+## Resources
+
+- [Rcpp: Seamless R and C++ Integration](https:\\Rcpp.org)
+- [cpp-tutorial](https://www.learncpp.com) is often recommended. Lots of ads though!
+- [cpp-reference](https://en.cppreference.com/w/cpp)
+- [C++20 for Programmers](https://www.pearson.com/en-us/subject-catalog/p/c20-for-programmers-an-objects-natural-approach/P200000000211/9780137570461) is a newer book that covers modern c++ for people who know programming in another language.
+
+## Op Success!
+
+
+
+
+## Meeting Videos
+
+### Cohort 1
+
+`r knitr::include_url("https://www.youtube.com/embed/2JDeacWl1DM")`
+
+`r knitr::include_url("https://www.youtube.com/embed/sLWCelHpcqc")`
+
+### Cohort 2
+
+`r knitr::include_url("https://www.youtube.com/embed/rQwOosOJpaY")`
+
+### Cohort 3
+
+`r knitr::include_url("https://www.youtube.com/embed/ZWdIeR1jK9Q")`
+
+### Cohort 4
+
+`r knitr::include_url("https://www.youtube.com/embed/_K8DKF3Fzes")`
+
+### Cohort 5
+
+`r knitr::include_url("https://www.youtube.com/embed/nske4iqsgh0")`
+
+### Cohort 6
+
+`r knitr::include_url("https://www.youtube.com/embed/hyVK08jXiYw")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:10:13 Arthur Shaw: Did things freeze for anyone else?
+00:55:40 Federica Gazzelloni: https://en.cppreference.com/w/cpp/container
+00:57:44 Federica Gazzelloni: https://dirk.eddelbuettel.com/blog/2011/07/14/
+01:07:33 Trevin: I don’t have experience
+01:07:54 Oluwafemi Oyedele: Same here!!!
+01:11:57 Arthur Shaw: Does anyone know any packages that use C++? The one that comes to mind for me is haven, which uses a C++ library
+01:12:30 Trevin: When I was looking, one that stood out to me was rstan
+01:13:02 Arthur Shaw: Reacted to "When I was looking, ..." with 👍
+```
+</details>
+
+### Cohort 7
+
+`r knitr::include_url("https://www.youtube.com/embed/Luu7JsixQgY")`
+
+<details>
+
+<summary>Meeting chat log</summary>
+```
+00:43:02 Gus Lipkin: I think I found the definition for `mean`
+
+An R call goes to *a which then calls the C function *b
+
+*a: https://github.com/wch/r-source/blob/trunk/src/library/base/R/mean.R
+*b: https://github.com/wch/r-source/blob/trunk/src/library/stats/src/cov.c#L207
+
+It looks like the second pass only happens if `R_FINITE(mean_from_first_pass)` which tries to call `isfinite` from C++ and if it’s not there, it’ll make sure it is a number and is not positive or negative infinity.
+00:49:55 Gus Lipkin: I feel bad for dropping in on the last chapter and getting Collin’s thanks 😅 I wish I’d joined sooner.
+```
+</details>
diff --git a/slides/25_Rewriting_R_code_in_C++.Rmd b/slides/25_Rewriting_R_code_in_C++.Rmd
@@ -1,708 +0,0 @@
-# Rewriting R code in C++
-
-**Learning objectives:**
-
-- Learn to improve performance by rewriting bottlenecks in C++
-
-- Introduction to the [{Rcpp} package](https://www.rcpp.org/)
-
-## Introduction
-
-In this chapter we'll learn how to rewrite **R** code in **C++** to make it faster using the **Rcpp package**. The **Rcpp** package makes it simple to connect C++ to R! With C++ you can fix:
-
-- Loops that can't be easily vectorised because subsequent iterations depend on previous ones.
-
-- Recursive functions, or problems which involve calling functions millions of times. The overhead of calling a function in C++ is much lower than in R.
-
-- Problems that require advanced data structures and algorithms that R doesn't provide. Through the **standard template library (STL)**, C++ has efficient implementations of many important data structures, from ordered maps to double-ended queue
-
-<center>Like how?</center>
-
-<center> </center>
-
-<center></center>
-
-
-
-## Getting started with C++
-
-```{r warning=FALSE}
-library(Rcpp)
-```
-
-Install a C++ compiler:
-
-- Rtools, on Windows
-- Xcode, on Mac
-- Sudo apt-get install r-base-dev or similar, on Linux.
-
-
-### First example {-}
-
-Rcpp compiling the C++ code:
-
-```{r}
-cppFunction('int add(int x, int y, int z) {
- int sum = x + y + z;
- return sum;
-}')
-# add works like a regular R function
-add
-
-add(1, 2, 3)
-```
-
-Some things to note:
-
-
-- The syntax to create a function is different.
-- Types of inputs and outputs must be explicitly declared
-- Use = for assignment, not `<-`.
-- Every statement is terminated by a ;
-- C++ has it's own name for the types we are used to:
- - scalar types are `int`, `double`, `bool` and `String`
- - vector types (for Rcpp) are `IntegerVector`, `NumericVector`, `LogicalVector` and `CharacterVector`
- - Other R types are available in C++: `List`, `Function`, `DataFrame`, and more.
-
-- Explicitly use a `return` statement to return a value from a function.
-
-
-
-## Example with scalar input and output {-}
-
-```{r}
-signR <- function(x) {
- if (x > 0) {
- 1
- } else if (x == 0) {
- 0
- } else {
- -1
- }
-}
-
-a <- -0.5
-b <- 0.5
-c <- 0
-signR(c)
-```
-
-Translation:
-
-```{r}
-cppFunction('int signC(int x) {
- if (x > 0) {
- return 1;
- } else if (x == 0) {
- return 0;
- } else {
- return -1;
- }
-}')
-```
-
-* Note that the `if` syntax is identical! Not everything is different!
-
-## Vector Input, Scalar output:{-}
-
-```{r}
-sumR <- function(x) {
- total <- 0
- for (i in seq_along(x)) {
- total <- total + x[i]
- }
- total
-}
-
-x<- runif(100)
-sumR(x)
-```
-
-Translation:
-
-```{r}
-cppFunction('double sumC(NumericVector x) {
- int n = x.size();
- double total = 0;
- for(int i = 0; i < n; ++i) {
- total += x[i];
- }
- return total;
-}')
-```
-
-Some observations:
-
-- vector indices *start at 0*
-- The for statement has a different syntax: for(init; check; increment)
-- Methods are called with `.`
-- `total += x[i]` is equivalent to `total = total + x[i]`.
-- other in-place operators are `-=`, `*=`, `and /=`
-
-
-To check for the fastest way we can use:
-
-```{r eval=FALSE}
-?bench::mark
-```
-
-```{r}
-x <- runif(1e3)
-bench::mark(
- sum(x),
- sumC(x),
- sumR(x)
-)
-```
-
-## Vector input and output {-}
-
-```{r}
-pdistR <- function(x, ys) {
- sqrt((x - ys) ^ 2)
-}
-```
-
-```{r}
-cppFunction('NumericVector pdistC(double x, NumericVector ys) {
- int n = ys.size();
- NumericVector out(n);
-
- for(int i = 0; i < n; ++i) {
- out[i] = sqrt(pow(ys[i] - x, 2.0));
- }
- return out;
-}')
-```
-
-Note: uses `pow()`, not `^`, for exponentiation
-
-```{r}
-y <- runif(1e6)
-bench::mark(
- pdistR(0.5, y),
- pdistC(0.5, y)
-)[1:6]
-```
-
-## Source your C++ code {-}
-
-Source stand-alone C++ files into R using `sourceCpp()`
-
-
-C++ files have extension `.cpp`
-
-```
-#include <Rcpp.h>
-using namespace Rcpp;
-```
-
-And for each function that you want available within R, you need to prefix it with:
-
-```
-// [[Rcpp::export]]
-```
-
-Inside a cpp file you can include `R` code using special comments
-
-```
-/*** R
-rcode here
-*/
-```
-
-
-
-### Example {-}
-
-This block in Rmarkdown uses `{Rcpp}` as a short hand for engine = "Rcpp".
-
-```{Rcpp}
-#include <Rcpp.h>
-using namespace Rcpp;
-
-// [[Rcpp::export]]
-double meanC(NumericVector x) {
- int n = x.size();
- double total = 0;
-
- for(int i = 0; i < n; ++i) {
- total += x[i];
- }
- return total / n;
-}
-
-/*** R
-x <- runif(1e5)
-bench::mark(
- mean(x),
- meanC(x)
-)
-*/
-```
-
-NOTE: For some reason although the r code above runs, `knit` doesn't include the output. Why?
-
-```{r}
-x <- runif(1e5)
-bench::mark(
- mean(x),
- meanC(x)
-)
-```
-
-
-
-## Data frames, functions, and attributes
-
-### Lists and Dataframes {-}
-
-Contrived example to illustrate how to access a dataframe from c++:
-
-```{Rcpp}
-#include <Rcpp.h>
-using namespace Rcpp;
-
-// [[Rcpp::export]]
-double mpe(List mod) {
- if (!mod.inherits("lm")) stop("Input must be a linear model");
-
- NumericVector resid = as<NumericVector>(mod["residuals"]);
- NumericVector fitted = as<NumericVector>(mod["fitted.values"]);
-
- int n = resid.size();
- double err = 0;
- for(int i = 0; i < n; ++i) {
- err += resid[i] / (fitted[i] + resid[i]);
- }
- return err / n;
-}
-```
-
-```{r}
-mod <- lm(mpg ~ wt, data = mtcars)
-mpe(mod)
-```
-
-- Note that you must *cast* the values to the required type. C++ needs to know the types in advance.
-
-### Functions {-}
-
-```{Rcpp}
-#include <Rcpp.h>
-using namespace Rcpp;
-
-// [[Rcpp::export]]
-RObject callWithOne(Function f) {
- return f(1);
-}
-```
-
-
-```{r}
-callWithOne(function(x) x + 1)
-```
-
-
-* Other values can be accessed from c++ including
-
- * attributes (use: `.attr()`. Also `.names()` is alias for name attribute.
- * `Environment`, `DottedPair`, `Language`, `Symbol` , etc.
-
-## Missing values
-
-### Missing values behave differently for C++ scalers{-}
-
-* Scalar NA's in Cpp : `NA_LOGICAL`, `NA_INTEGER`, `NA_REAL`, `NA_STRING`.
-
-* Integers (`int`) stores R NA's as the smallest integer. Better to use length 1 `IntegerVector`
-* Doubles use IEEE 754 NaN , which behaves a bit differently for logical expressions (but ok for math expressions).
-
-```{r}
-evalCpp("NA_REAL || FALSE")
-```
-
-* Strings are a class from Rcpp, so they handle missing values fine.
-
-* `bool` can only hold two values, so be careful. Consider using vectors of length 1 or coercing to `int`
-
-
-### Vectors
-
-* Vectors are all type introduced by RCpp and know how to handle missing values if you use the specific type for that vector.
-
-```{Rcpp}
-#include <Rcpp.h>
-using namespace Rcpp;
-
-// [[Rcpp::export]]
-List missing_sampler() {
- return List::create(
- NumericVector::create(NA_REAL),
- IntegerVector::create(NA_INTEGER),
- LogicalVector::create(NA_LOGICAL),
- CharacterVector::create(NA_STRING)
- );
-}
-```
-
-```{r}
-str(missing_sampler())
-```
-
-## Standard Template Library
-
-STL provides powerful data structures and algorithms for C++.
-
-### Iterators {-}
-
-Iterators are used extensively in the STL to abstract away details of underlying data structures.
-
-If you an iterator `it`, you can:
-
-- Get the value by 'dereferencing' with `*it`
-- Advance to the next value with `++it`
-- Compare iterators (locations) with `==`
-
-
-### Algorithms {-}
-
-* The real power of iterators comes from using them with STL algorithms.
-
-* A good reference is [https://en.cppreference.com/w/cpp/algorithm]
-
-* Book provides examples using `accumulate` and `upper_buond`
-
-* Another Example:
-
-```{Rcpp}
-
-#include <algorithm>
-#include <Rcpp.h>
-
-using namespace Rcpp;
-
-
-// Explicit iterator version
-
-// [[Rcpp::export]]
-NumericVector square_C_it(NumericVector x){
- NumericVector out(x.size());
- // Each container has its own iterator type
- NumericVector::iterator in_it;
- NumericVector::iterator out_it;
-
- for(in_it = x.begin(), out_it = out.begin(); in_it != x.end(); ++in_it, ++out_it) {
- *out_it = pow(*in_it,2);
- }
-
- return out;
-
-}
-
-
-// Use algorithm 'transform'
-
-// [[Rcpp::export]]
-NumericVector square_C(NumericVector x) {
-
- NumericVector out(x.size());
-
-
- std::transform(x.begin(),x.end(), out.begin(),
- [](double v) -> double { return v*v; });
- return out;
-}
-```
-
-```{r}
-square_C(c(1.0,2.0,3.0))
-```
-```{r}
-square_C_it(c(1.0,2.0,3.0))
-```
-
-## Data Structures {-}
-
-STL provides a large set of data structures. Some of the most important:
-
-* `std::vector` - like an `R` vector, except knows how to grow efficiently
-
-* `std::unordered_set` - unique set of values. Ordered version `std::set`. Unordered is more efficient.
-
-* `std::map` - Moslty similar to `R` lists, provide an association between a key and a value. There is also an unordered version.
-
-A quick example illustrating the `map`:
-
-```{Rcpp}
-#include <Rcpp.h>
-using namespace Rcpp;
-
-// [[Rcpp::export]]
-std::map<double, int> tableC(NumericVector x) {
- // Note the types are <key, value>
- std::map<double, int> counts;
-
- int n = x.size();
- for (int i = 0; i < n; i++) {
- counts[x[i]]++;
- }
-
- return counts;
-}
-```
-
-
-```{r}
-res = tableC(c(1,1,2,1,4,5))
-res
-```
-
-* Note that the map is converted to a named vector in this case on return
-
-
-To learn more about the STL data structures see [containers](https://en.cppreference.com/w/cpp/container) at `cppreference`
-
-## Case Studies
-
-
-
-Real life uses of C++ to replace slow R code.
-
-
-## Case study 1: Gibbs sampler {-}
-
-The [Gibbs sampler](https://en.wikipedia.org/wiki/Gibbs_sampling) is a method for estimating parameters expectations. It is a **MCMC algorithm** that has been adapted to sample from multidimensional target distributions. Gibbs sampling generates a **Markov chain** of samples, each of which is correlated with nearby samples.
-
-[Example blogged by Dirk Eddelbuettel](https://dirk.eddelbuettel.com/blog/2011/07/14/), the R and C++ code is very similar but runs about 20 times faster.
-
-> "Darren Wilkinson stresses the rather pragmatic aspects of how fast and/or easy it is to write the code, rather than just the mere runtime.
-
-
-<center></center>
-
-
-R code:
-
-```{r}
-gibbs_r <- function(N, thin) {
- mat <- matrix(nrow = N, ncol = 2)
- x <- y <- 0
-
- for (i in 1:N) {
- for (j in 1:thin) {
- x <- rgamma(1, 3, y * y + 4)
- y <- rnorm(1, 1 / (x + 1), 1 / sqrt(2 * (x + 1)))
- }
- mat[i, ] <- c(x, y)
- }
- mat
-}
-```
-
-Actions to convert R to C++:
-
-- Add type declarations to all variables
-- Use `(` instead of `[` to index into the matrix
-- Subscript the results of `rgamma` and `rnorm` to convert from a vector into a scalar.
-
-```{Rcpp}
-#include <Rcpp.h>
-using namespace Rcpp;
-
-// [[Rcpp::export]]
-NumericMatrix gibbs_cpp(int N, int thin) {
- NumericMatrix mat(N, 2);
- double x = 0, y = 0;
-
- for(int i = 0; i < N; i++) {
- for(int j = 0; j < thin; j++) {
- x = rgamma(1, 3, 1 / (y * y + 4))[0];
- y = rnorm(1, 1 / (x + 1), 1 / sqrt(2 * (x + 1)))[0];
- }
- mat(i, 0) = x;
- mat(i, 1) = y;
- }
-
- return(mat);
-}
-```
-
-Checking who's best:
-
-```{r}
-bench::mark(
- gibbs_r(100, 10),
- gibbs_cpp(100, 10),
- check = FALSE
-)
-```
-
-## Case study 2: predict a model response from three inputs {-}
-
-[Rcpp is smoking fast for agent based models in data frames](https://gweissman.github.io/post/rcpp-is-smoking-fast-for-agent-based-models-in-data-frames/) by Gary Weissman, MD, MSHP.
-
-Starts with this code:
-
-```{r}
-vacc1a <- function(age, female, ily) {
- p <- 0.25 + 0.3 * 1 / (1 - exp(0.04 * age)) + 0.1 * ily
- p <- p * if (female) 1.25 else 0.75
- p <- max(0, p)
- p <- min(1, p)
- p
-}
-```
-
-R code with a for loop:
-
-```{r}
-vacc1 <- function(age, female, ily) {
- n <- length(age)
- out <- numeric(n)
- for (i in seq_len(n)) {
- out[i] <- vacc1a(age[i], female[i], ily[i])
- }
- out
-}
-```
-
-Vectorized R code:
-
-```{r}
-vacc2 <- function(age, female, ily) {
- p <- 0.25 + 0.3 * 1 / (1 - exp(0.04 * age)) + 0.1 * ily
- p <- p * ifelse(female, 1.25, 0.75)
- p <- pmax(0, p)
- p <- pmin(1, p)
- p
-}
-```
-
-C++:
-
-```{Rcpp}
-#include <Rcpp.h>
-using namespace Rcpp;
-
-double vacc3a(double age, bool female, bool ily){
- double p = 0.25 + 0.3 * 1 / (1 - exp(0.04 * age)) + 0.1 * ily;
- p = p * (female ? 1.25 : 0.75);
- p = std::max(p, 0.0);
- p = std::min(p, 1.0);
- return p;
-}
-
-// [[Rcpp::export]]
-NumericVector vacc3(NumericVector age, LogicalVector female,
- LogicalVector ily) {
- int n = age.size();
- NumericVector out(n);
-
- for(int i = 0; i < n; ++i) {
- out[i] = vacc3a(age[i], female[i], ily[i]);
- }
-
- return out;
-}
-```
-
-Sample data:
-
-```{r}
-n <- 1000
-age <- rnorm(n, mean = 50, sd = 10)
-female <- sample(c(T, F), n, rep = TRUE)
-ily <- sample(c(T, F), n, prob = c(0.8, 0.2), rep = TRUE)
-
-stopifnot(
- all.equal(vacc1(age, female, ily), vacc2(age, female, ily)),
- all.equal(vacc1(age, female, ily), vacc3(age, female, ily))
-)
-```
-
-<center>**Who's faster?**</center>
-<center></center>
-
-```{r}
-bench::mark(
- vacc1 = vacc1(age, female, ily),
- vacc2 = vacc2(age, female, ily),
- vacc3 = vacc3(age, female, ily)
-)
-```
-
-## Resources
-
-- [Rcpp: Seamless R and C++ Integration](https:\\Rcpp.org)
-- [cpp-tutorial](https://www.learncpp.com) is often recommended. Lots of ads though!
-- [cpp-reference](https://en.cppreference.com/w/cpp)
-- [C++20 for Programmers](https://www.pearson.com/en-us/subject-catalog/p/c20-for-programmers-an-objects-natural-approach/P200000000211/9780137570461) is a newer book that covers modern c++ for people who know programming in another language.
-
-## Op Success!
-
-
-
-
-## Meeting Videos
-
-### Cohort 1
-
-`r knitr::include_url("https://www.youtube.com/embed/2JDeacWl1DM")`
-
-`r knitr::include_url("https://www.youtube.com/embed/sLWCelHpcqc")`
-
-### Cohort 2
-
-`r knitr::include_url("https://www.youtube.com/embed/rQwOosOJpaY")`
-
-### Cohort 3
-
-`r knitr::include_url("https://www.youtube.com/embed/ZWdIeR1jK9Q")`
-
-### Cohort 4
-
-`r knitr::include_url("https://www.youtube.com/embed/_K8DKF3Fzes")`
-
-### Cohort 5
-
-`r knitr::include_url("https://www.youtube.com/embed/nske4iqsgh0")`
-
-### Cohort 6
-
-`r knitr::include_url("https://www.youtube.com/embed/hyVK08jXiYw")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:10:13 Arthur Shaw: Did things freeze for anyone else?
-00:55:40 Federica Gazzelloni: https://en.cppreference.com/w/cpp/container
-00:57:44 Federica Gazzelloni: https://dirk.eddelbuettel.com/blog/2011/07/14/
-01:07:33 Trevin: I don’t have experience
-01:07:54 Oluwafemi Oyedele: Same here!!!
-01:11:57 Arthur Shaw: Does anyone know any packages that use C++? The one that comes to mind for me is haven, which uses a C++ library
-01:12:30 Trevin: When I was looking, one that stood out to me was rstan
-01:13:02 Arthur Shaw: Reacted to "When I was looking, ..." with 👍
-```
-</details>
-
-### Cohort 7
-
-`r knitr::include_url("https://www.youtube.com/embed/Luu7JsixQgY")`
-
-<details>
-
-<summary>Meeting chat log</summary>
-```
-00:43:02 Gus Lipkin: I think I found the definition for `mean`
-
-An R call goes to *a which then calls the C function *b
-
-*a: https://github.com/wch/r-source/blob/trunk/src/library/base/R/mean.R
-*b: https://github.com/wch/r-source/blob/trunk/src/library/stats/src/cov.c#L207
-
-It looks like the second pass only happens if `R_FINITE(mean_from_first_pass)` which tries to call `isfinite` from C++ and if it’s not there, it’ll make sure it is a number and is not positive or negative infinity.
-00:49:55 Gus Lipkin: I feel bad for dropping in on the last chapter and getting Collin’s thanks 😅 I wish I’d joined sooner.
-```
-</details>
diff --git a/templates/_chapter_header.yml b/templates/_chapter_header.yml
@@ -0,0 +1,12 @@
+title: "{number}. {title}"
+listing:
+ - contents: "slides/{number_wide}.qmd"
+ id: slides
+ type: grid
+ - contents: "videos/{number_wide}"
+ id: videos
+ type: grid
+ grid-columns: 2
+ sort: "filename desc"
+header-includes:
+ - '<script src="listing_new_window.js" defer></script>'
diff --git a/templates/_slides.qmd b/templates/_slides.qmd
@@ -0,0 +1,2 @@
+:::{#slides}
+:::
diff --git a/templates/_videos.qmd b/templates/_videos.qmd
@@ -0,0 +1,4 @@
+## Meeting videos
+
+:::{#videos}
+:::
diff --git a/toc.csv b/toc.csv
@@ -0,0 +1,29 @@
+part,number,title,number_wide
+Getting Started,1,Introduction,01
+Foundations,2,Names and values,02
+Foundations,3,Vectors,03
+Foundations,4,Subsetting,04
+Foundations,5,Control flow,05
+Foundations,6,Functions,06
+Foundations,7,Environments,07
+Foundations,8,Conditions,08
+Functional programming,9,Functionals,09
+Functional programming,10,Function factories,10
+Functional programming,11,Function operators,11
+Object-oriented programming,12,OOP Introduction & Base types,12
+Object-oriented programming,13,S3,13
+Object-oriented programming,15,S4,15
+Object-oriented programming,15b,S7,15b
+Object-oriented programming,14,R6,14
+Object-oriented programming,16,OOP Trade-offs,16
+Metaprogramming,17,Metaprogramming big picture,17
+Metaprogramming,18,Expressions,18
+Metaprogramming,19,Quasiquotation,19
+Metaprogramming,20,Evaluation,20
+Metaprogramming,21,Translating R code,21
+Techniques,22,Debugging,22
+Techniques,23,Measuring performance,23
+Techniques,24,Improving performance,24
+Techniques,25,Rewriting R code in C++,25
+Techniques,25b,C for R,25b
+Techniques,25c,Rust for R,25c
