davidbgk
/
larlet-fr-david
关注 1
点赞 0
派生 0
代码 版本发布 0 动态
Repository with sources and generator of https://larlet.fr/david/ https://larlet.fr/david/
您最多选择25个主题 主题必须以字母或数字开头，可以包含连字符 (-)，并且长度不得超过35个字符
702 提交
1 分支
目录树: 60cad35cdc
分支列表 标签列表
${ item.name }
创建分支 ${ searchTerm }
从 '60cad35cdc'
${ noResults }
larlet-fr-david/david/blog/2016/programmation-apprehension/index.html

index.html 37KB
原始文件 Blame 文件历史

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858 
  1. <!doctype html><!-- This is a valid HTML5 document. -->

  2. <!-- Screen readers, SEO, extensions and so on. -->

  3. <html lang=fr>

  4. <!-- Has to be within the first 1024 bytes, hence before the <title>

  5.   See: https://www.w3.org/TR/2012/CR-html5-20121217/document-metadata.html#charset -->

  6. <meta charset=utf-8>

  7. <!-- Why no `X-UA-Compatible` meta: https://stackoverflow.com/a/6771584 -->

  8. <!-- The viewport meta is quite crowded and we are responsible for that.

  9.   See: https://codepen.io/tigt/post/meta-viewport-for-2015 -->

  10. <meta name=viewport content="width=device-width,minimum-scale=1,initial-scale=1,shrink-to-fit=no">

  11. <!-- Required to make a valid HTML5 document. -->

  12. <title>Programmation et appréhension — David Larlet</title>

  13. <!-- Generated from https://realfavicongenerator.net/ such a mess. -->

  14. <link rel="apple-touch-icon" sizes="180x180" href="/static/david/icons/apple-touch-icon.png">

  15. <link rel="icon" type="image/png" sizes="32x32" href="/static/david/icons/favicon-32x32.png">

  16. <link rel="icon" type="image/png" sizes="16x16" href="/static/david/icons/favicon-16x16.png">

  17. <link rel="manifest" href="/manifest.json">

  18. <link rel="mask-icon" href="/static/david/icons/safari-pinned-tab.svg" color="#5bbad5">

  19. <link rel="shortcut icon" href="/static/david/icons/favicon.ico">

  20. <meta name="apple-mobile-web-app-title" content="David Larlet">

  21. <meta name="application-name" content="David Larlet">

  22. <meta name="msapplication-TileColor" content="#da532c">

  23. <meta name="msapplication-config" content="/static/david/icons/browserconfig.xml">

  24. <meta name="theme-color" content="#f0f0ea">

  25. <!-- That good ol' feed, subscribe :p. -->

  26. <link rel=alternate type="application/atom+xml" title=Feed href="/david/log/">

  27. 

  28.   <!-- Canonical URL for SEO purposes -->

  29.   <link rel="canonical" href="https://larlet.fr/david/blog/2016/programmation-apprehension/">

  30.   <!-- SEO/Semantic metadata -->

  31.   <meta name="description" content="Les savoirs s’acquièrent dans le temps, la pratique et la répétition." />

  32.   <meta name="twitter:description" property="og:description" itemprop="description" content="Les savoirs s’acquièrent dans le temps, la pratique et la répétition." />

  33.   <meta name="twitter:title" property="og:title" itemprop="name" content="Programmation et appréhension" />

  34.   <meta name="twitter:card" content="summary" />

  35.   <meta name="twitter:creator" content="@davidbgk" />

  36.   <meta name="twitter:url" property="og:url" content="https://larlet.fr/david/blog/2016/programmation-apprehension/" />

  37.   <meta property="og:type" content="article" />

  38.   <meta property="og:site_name" content="David Larlet (@davidbgk)" />

  39. 

  40.   <meta name="twitter:image" property="og:image" itemprop="image" content="https://larlet.fr/static/david/blog/2016/programmation-apprehension.jpg" />

  41. 

  42. 

  43. <style>

  44. /* http://meyerweb.com/eric/tools/css/reset/ */

  45. html, body, div, span,

  46. h1, h2, h3, h4, h5, h6, p, blockquote, pre,

  47. a, abbr, address, big, cite, code,

  48. del, dfn, em, img, ins,

  49. small, strike, strong, tt, var,

  50. dl, dt, dd, ol, ul, li,

  51. fieldset, form, label, legend,

  52. table, caption, tbody, tfoot, thead, tr, th, td,

  53. article, aside, canvas, details, embed,

  54. figure, figcaption, footer, header, hgroup,

  55. menu, nav, output, ruby, section, summary,

  56. time, mark, audio, video {

  57.   margin: 0;

  58.   padding: 0;

  59.   border: 0;

  60.   font-size: 100%;

  61.   font: inherit;

  62.   vertical-align: baseline;

  63. }

  64. /* HTML5 display-role reset for older browsers */

  65. article, aside, details, figcaption, figure,

  66. footer, header, hgroup, menu, nav, section { display: block; }

  67. body { line-height: 1; }

  68. blockquote, q { quotes: none; }

  69. blockquote:before, blockquote:after,

  70. q:before, q:after {

  71.   content: '';

  72.   content: none;

  73. }

  74. table {

  75.   border-collapse: collapse;

  76.   border-spacing: 0;

  77. }

  78. 

  79. /* http://practicaltypography.com/equity.html */

  80. /* https://calendar.perfplanet.com/2016/no-font-face-bulletproof-syntax/ */

  81. /* https://www.filamentgroup.com/lab/js-web-fonts.html */

  82. @font-face {

  83.   font-family: 'EquityTextB';

  84.   src: url('/static/david/css/fonts/Equity-Text-B-Regular-webfont.woff2') format('woff2'),

  85.        url('/static/david/css/fonts/Equity-Text-B-Regular-webfont.woff') format('woff');

  86.   font-weight: 300;

  87.   font-style: normal;

  88.   font-display: swap;

  89. }

  90. @font-face {

  91.   font-family: 'EquityTextB';

  92.   src: url('/static/david/css/fonts/Equity-Text-B-Italic-webfont.woff2') format('woff2'),

  93.        url('/static/david/css/fonts/Equity-Text-B-Italic-webfont.woff') format('woff');

  94.   font-weight: 300;

  95.   font-style: italic;

  96.   font-display: swap;

  97. }

  98. @font-face {

  99.   font-family: 'EquityTextB';

  100.   src: url('/static/david/css/fonts/Equity-Text-B-Bold-webfont.woff2') format('woff2'),

  101.        url('/static/david/css/fonts/Equity-Text-B-Bold-webfont.woff') format('woff');

  102.   font-weight: 700;

  103.   font-style: normal;

  104.   font-display: swap;

  105. }

  106. 

  107. @font-face {

  108.   font-family: 'ConcourseT3';

  109.   src: url('/static/david/css/fonts/concourse_t3_regular-webfont-20190806.woff2') format('woff2'),

  110.        url('/static/david/css/fonts/concourse_t3_regular-webfont-20190806.woff') format('woff');

  111.   font-weight: 300;

  112.   font-style: normal;

  113.   font-display: swap;

  114. }

  115. 

  116. 

  117. /* http://practice.typekit.com/lesson/caring-about-opentype-features/ */

  118. body {

  119.   /* http://www.cssfontstack.com/ Palatino 99% Win 86% Mac */

  120.   font-family: "EquityTextB", Palatino, serif;

  121.   background-color: #f0f0ea;

  122.   color: #07486c;

  123.   font-kerning: normal;

  124.   -moz-osx-font-smoothing: grayscale;

  125.   -webkit-font-smoothing: subpixel-antialiased;

  126.   text-rendering: optimizeLegibility;

  127.   font-variant-ligatures: common-ligatures contextual;

  128.   font-feature-settings: "kern", "liga", "clig", "calt";

  129. }

  130. pre, code, kbd, samp, var, tt {

  131.   font-family: 'TriplicateT4c', monospace;

  132. }

  133. em {

  134.   font-style: italic;

  135.   color: #323a45;

  136. }

  137. strong {

  138.   font-weight: bold;

  139.   color: black;

  140. }

  141. nav {

  142.   background-color: #323a45;

  143.   color: #f0f0ea;

  144.   display: flex;

  145.   justify-content: space-around;

  146.   padding: 1rem .5rem;

  147. }

  148.   nav:last-child {

  149.     border-bottom: 1vh solid #2d7474;

  150.   }

  151.   nav a {

  152.     color: #f0f0ea;

  153.   }

  154.   nav abbr {

  155.     border-bottom: 1px dotted white;

  156.   }

  157. 

  158. h1 {

  159.   border-top: 1vh solid #2d7474;

  160.   border-bottom: .2vh dotted #2d7474;

  161.   background-color: #e3e1e1;

  162.   color: #323a45;

  163.   text-align: center;

  164.   padding: 5rem 0 4rem 0;

  165.   width: 100%;

  166.   font-family: 'ConcourseT3';

  167.   display: flex;

  168.   flex-direction: column;

  169. }

  170.   h1.single {

  171.     padding-bottom: 10rem;

  172.   }

  173.   h1 span {

  174.     position: absolute;

  175.     top: 1vh;

  176.     left: 20%;

  177.     line-height: 0;

  178.   }

  179.     h1 span a {

  180.       line-height: 1.7;

  181.       padding: 1rem 1.2rem .6rem 1.2rem;

  182.       border-radius: 0 0 6% 6%;

  183.       background: #2d7474;

  184.       font-size: 1.3rem;

  185.       color: white;

  186.       text-decoration: none;

  187.     }

  188. h2 {

  189.   margin: 4rem 0 1rem;

  190.   border-top: .2vh solid #2d7474;

  191.   padding-top: 1vh;

  192. }

  193. h3 {

  194.   text-align: center;

  195.   margin: 3rem 0 .75em;

  196. }

  197. hr {

  198.   height: .4rem;

  199.   width: .4rem;

  200.   border-radius: .4rem;

  201.   background: #07486c;

  202.   margin: 2.5rem auto;

  203. }

  204. time {

  205.   display: bloc;

  206.   margin-left: 0 !important;

  207. }

  208. ul, ol {

  209.   margin: 2rem;

  210. }

  211. ul {

  212.   list-style-type: square;

  213. }

  214. a {

  215.   text-decoration-skip-ink: auto;

  216.   text-decoration-thickness: 0.05em;

  217.   text-underline-offset: 0.09em;

  218. }

  219. article {

  220.   max-width: 50rem;

  221.   display: flex;

  222.   flex-direction: column;

  223.   margin: 2rem auto;

  224. }

  225.   article.single {

  226.     border-top: .2vh dotted #2d7474;

  227.     margin: -6rem auto 1rem auto;

  228.     background: #f0f0ea;

  229.     padding: 2rem;

  230.   }

  231.   article p:last-child {

  232.     margin-bottom: 1rem;

  233.   }

  234. p {

  235.   padding: 0 .5rem;

  236.   margin-left: 3rem;

  237. }

  238.   p + p,

  239.   figure + p {

  240.     margin-top: 2rem;

  241.   }

  242. 

  243. blockquote {

  244.   background-color: #e3e1e1;

  245.   border-left: .5vw solid #2d7474;

  246.   display: flex;

  247.   flex-direction: column;

  248.   align-items: center;

  249.   padding: 1rem;

  250.   margin: 1.5rem;

  251. }

  252.   blockquote cite {

  253.     font-style: italic;

  254.   }

  255.   blockquote p {

  256.     margin-left: 0;

  257.   }

  258. 

  259. figure {

  260.   border-top: .2vh solid #2d7474;

  261.   background-color: #e3e1e1;

  262.   text-align: center;

  263.   padding: 1.5rem 0;

  264.   margin: 1rem 0 0;

  265.   font-size: 1.5rem;

  266.   width: 100%;

  267. }

  268.   figure img {

  269.     max-width: 250px;

  270.     max-height: 250px;

  271.     border: .5vw solid #323a45;

  272.     padding: 1px;

  273.   }

  274. figcaption {

  275.   padding: 1rem;

  276.   line-height: 1.4;

  277. }

  278. aside {

  279.   display: flex;

  280.   flex-direction: column;

  281.   background-color: #e3e1e1;

  282.   padding: 1rem 0;

  283.   border-bottom: .2vh solid #07486c;

  284. }

  285.   aside p {

  286.     max-width: 50rem;

  287.     margin: 0 auto;

  288.   }

  289. 

  290. /* https://fvsch.com/code/css-locks/ */

  291. p, li, pre, code, kbd, samp, var, tt, time, details, figcaption {

  292.   font-size: 1rem;

  293.   line-height: calc( 1.5em + 0.2 * 1rem );

  294. }

  295. h1 {

  296.   font-size: 1.9rem;

  297.   line-height: calc( 1.2em + 0.2 * 1rem );

  298. }

  299. h2 {

  300.   font-size: 1.6rem;

  301.   line-height: calc( 1.3em + 0.2 * 1rem );

  302. }

  303. h3 {

  304.   font-size: 1.35rem;

  305.   line-height: calc( 1.4em + 0.2 * 1rem );

  306. }

  307. @media (min-width: 20em) {

  308.   /* The (100vw - 20rem) / (50 - 20) part

  309.      resolves to 0-1rem, depending on the

  310.      viewport width (between 20em and 50em). */

  311.   p, li, pre, code, kbd, samp, var, tt, time, details, figcaption {

  312.     font-size: calc( 1rem + .6 * (100vw - 20rem) / (50 - 20) );

  313.     line-height: calc( 1.5em + 0.2 * (100vw - 50rem) / (20 - 50) );

  314.     margin-left: 0;

  315.   }

  316.   h1 {

  317.     font-size: calc( 1.9rem + 1.5 * (100vw - 20rem) / (50 - 20) );

  318.     line-height: calc( 1.2em + 0.2 * (100vw - 50rem) / (20 - 50) );

  319.   }

  320.   h2 {

  321.     font-size: calc( 1.5rem + 1.5 * (100vw - 20rem) / (50 - 20) );

  322.     line-height: calc( 1.3em + 0.2 * (100vw - 50rem) / (20 - 50) );

  323.   }

  324.   h3 {

  325.     font-size: calc( 1.35rem + 1.5 * (100vw - 20rem) / (50 - 20) );

  326.     line-height: calc( 1.4em + 0.2 * (100vw - 50rem) / (20 - 50) );

  327.   }

  328. }

  329. @media (min-width: 50em) {

  330.   /* The right part of the addition *must* be a

  331.      rem value. In this example we *could* change

  332.      the whole declaration to font-size:2.5rem,

  333.      but if our baseline value was not expressed

  334.      in rem we would have to use calc. */

  335.   p, li, pre, code, kbd, samp, var, tt, time, details, figcaption {

  336.     font-size: calc( 1rem + .6 * 1rem );

  337.     line-height: 1.5em;

  338.   }

  339.   p, li, pre, details {

  340.     margin-left: 3rem;

  341.   }

  342.   h1 {

  343.     font-size: calc( 1.9rem + 1.5 * 1rem );

  344.     line-height: 1.2em;

  345.   }

  346.   h2 {

  347.     font-size: calc( 1.5rem + 1.5 * 1rem );

  348.     line-height: 1.3em;

  349.   }

  350.   h3 {

  351.     font-size: calc( 1.35rem + 1.5 * 1rem );

  352.     line-height: 1.4em;

  353.   }

  354.   figure img {

  355.     max-width: 500px;

  356.     max-height: 500px;

  357.   }

  358. }

  359. 

  360. figure.unsquared {

  361.   margin-bottom: 1.5rem;

  362. }

  363.   figure.unsquared img {

  364.     height: inherit;

  365.   }

  366. 

  367. 

  368. 

  369. @media print {

  370.   body { font-size: 100%; }

  371.   a:after { content: " (" attr(href) ")"; }

  372.   a, a:link, a:visited, a:after {

  373.     text-decoration: underline;

  374.     text-shadow: none !important;

  375.     background-image: none !important;

  376.     background: white;

  377.     color: black;

  378.   }

  379.   abbr[title] { border-bottom: 0; }

  380.   abbr[title]:after { content: " (" attr(title) ")"; }

  381.   img { page-break-inside: avoid; }

  382.   @page { margin: 2cm .5cm; }

  383.   h1, h2, h3 { page-break-after: avoid; }

  384.   p3 { orphans: 3; widows: 3; }

  385.   img {

  386.     max-width: 250px !important;

  387.     max-height: 250px !important;

  388.   }

  389.   nav, aside { display: none; }

  390. }

  391. 

  392. ul.with_columns {

  393.   column-count: 1;

  394. }

  395. @media (min-width: 20em) {

  396.   ul.with_columns {

  397.     column-count: 2;

  398.   }

  399. }

  400. @media (min-width: 50em) {

  401.   ul.with_columns {

  402.     column-count: 3;

  403.   }

  404. }

  405. ul.with_two_columns {

  406.   column-count: 1;

  407. }

  408. @media (min-width: 20em) {

  409.   ul.with_two_columns {

  410.     column-count: 1;

  411.   }

  412. }

  413. @media (min-width: 50em) {

  414.   ul.with_two_columns {

  415.     column-count: 2;

  416.   }

  417. }

  418. 

  419. .gallery {

  420.   display: flex;

  421.   flex-wrap: wrap;

  422.   justify-content: space-around;

  423. }

  424.   .gallery figure img {

  425.     margin-left: 1rem;

  426.     margin-right: 1rem;

  427.   }

  428.   .gallery figure figcaption {

  429.     font-family: 'ConcourseT3'

  430.   }

  431. 

  432. footer {

  433.   font-family: 'ConcourseT3';

  434.   display: flex;

  435.   flex-direction: column;

  436.   border-top: 3px solid white;

  437.   padding: 4rem 0;

  438.   background-color: #07486c;

  439.   color: white;

  440. }

  441.   footer > * {

  442.     max-width: 50rem;

  443.     margin: 0 auto;

  444.   }

  445.   footer a {

  446.     color: #f1c40f;

  447.   }

  448.   footer .avatar {

  449.     width: 200px;

  450.     height: 200px;

  451.     border-radius: 50%;

  452.     float: left;

  453.     -webkit-shape-outside: circle();

  454.     shape-outside: circle();

  455.     margin-right: 2rem;

  456.     padding: 2px 5px 5px 2px;

  457.     background: white;

  458.     border-left: 1px solid #f1c40f;

  459.     border-top: 1px solid #f1c40f;

  460.     border-right: 5px solid #f1c40f;

  461.     border-bottom: 5px solid #f1c40f;

  462.   }

  463. </style>

  464. 

  465. <h1 class="single">

  466.   <span><a id="jumper" href="#jumpto" title="Un peu perdu ?">?</a></span>

  467.   Programmation et appréhension

  468.   <time>Publié le 1 février 2016</time>

  469. </h1>

  470. <article class="single">

  471.   <blockquote>

  472. <p>It’s unnecessary and complicated at almost every layer. At best I can congratulate someone for quickly and simply solving a problem on top of the shit that they are given. The only software that I like is one that I can easily understand and solves my problems. The amount of complexity I’m willing to tolerate is proportional to the size of the problem being solved. </p>

  473. <p><cite><em><a href="http://tinyclouds.org/rant.html">I hate almost all software</a></em> (<a href="/david/cache/b932828a2ee51364e222b82b9ba4e870/">cache</a>)</cite></p>

  474. </blockquote>

  475. <p>Les <a href="/david/pro/enseignement/">deux derniers cours</a> ont été dédiés au développement de petites fonctionnalités qui ont permis de révéler que <a href="/david/blog/2016/javascript-zero/">la compréhension de JavaScript</a> est bien éloignée de la pratique.</p>

  476. <p>Deux points bloquants ont été remontés par les étudiants :</p>

  477. <ul>

  478. <li>la syntaxe difficile à appréhender et l’on en revient à <a href="/david/blog/2015/javascript-abstraction/">l’abstraction</a> ;</li>

  479. <li>les concepts liés à la programmation qui demandent du temps pour être assimilés.</li>

  480. </ul>

  481. <h2>Syntaxe et abstraction</h2>

  482. <p>Du coup j’ai revu ma copie <a href="https://gist.github.com/davidbgk/62c3aed0d09599ed0886">une dizaine de fois</a> (merci ##openweb) pour arriver à l’abstraction suivante :</p>

  483. <div class="codehilite"><pre><span class="nb">window</span><span class="p">.</span><span class="nx">$</span> <span class="o">=</span> <span class="nx">selector</span> <span class="o">=&gt;</span> <span class="nb">Array</span><span class="p">.</span><span class="nx">from</span><span class="p">(</span><span class="nb">document</span><span class="p">.</span><span class="nx">querySelectorAll</span><span class="p">(</span><span class="nx">selector</span><span class="p">))</span>

  484. <span class="nb">window</span><span class="p">.</span><span class="nx">$$</span> <span class="o">=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">querySelector</span><span class="p">.</span><span class="nx">bind</span><span class="p">(</span><span class="nb">document</span><span class="p">)</span>

  485. <span class="nb">window</span><span class="p">.</span><span class="nx">on</span> <span class="o">=</span> <span class="nx">Node</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">on</span> <span class="o">=</span> <span class="nb">Array</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">on</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">type</span><span class="p">,</span> <span class="p">...</span><span class="nx">rest</span><span class="p">)</span> <span class="p">{</span>

  486.     <span class="kd">let</span> <span class="nx">listener</span>

  487.     <span class="k">if</span> <span class="p">(</span><span class="k">typeof</span> <span class="nx">rest</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">===</span> <span class="s1">&#39;function&#39;</span><span class="p">)</span> <span class="p">{</span>

  488.         <span class="nx">listener</span> <span class="o">=</span> <span class="nx">rest</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>

  489.     <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>

  490.         <span class="kr">const</span> <span class="p">[</span><span class="nx">targetNodeName</span><span class="p">,</span> <span class="nx">innerListener</span><span class="p">]</span> <span class="o">=</span> <span class="nx">rest</span>

  491.         <span class="nx">listener</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">event</span><span class="p">)</span> <span class="p">{</span>

  492.             <span class="k">if</span> <span class="p">(</span><span class="nx">event</span><span class="p">.</span><span class="nx">target</span><span class="p">.</span><span class="nx">nodeName</span><span class="p">.</span><span class="nx">toLowerCase</span><span class="p">()</span> <span class="o">===</span> <span class="nx">targetNodeName</span><span class="p">)</span> <span class="p">{</span>

  493.                 <span class="nx">innerListener</span><span class="p">(</span><span class="nx">event</span><span class="p">)</span>

  494.             <span class="p">}</span>

  495.         <span class="p">}</span>

  496.     <span class="p">}</span>

  497.     <span class="nb">Array</span><span class="p">.</span><span class="nx">concat</span><span class="p">(</span><span class="k">this</span><span class="p">).</span><span class="nx">forEach</span><span class="p">(</span><span class="nx">element</span> <span class="o">=&gt;</span> <span class="nx">element</span><span class="p">.</span><span class="nx">addEventListener</span><span class="p">(</span><span class="nx">type</span><span class="p">,</span> <span class="nx">listener</span><span class="p">))</span>

  498. <span class="p">}</span>

  499. <span class="nb">window</span><span class="p">.</span><span class="nx">$</span><span class="p">.</span><span class="nx">on</span> <span class="o">=</span> <span class="nb">window</span><span class="p">.</span><span class="nx">on</span><span class="p">.</span><span class="nx">bind</span><span class="p">(</span><span class="nb">document</span><span class="p">)</span>

  500. <span class="nb">window</span><span class="p">.</span><span class="nx">trigger</span> <span class="o">=</span> <span class="nx">Node</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">trigger</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">type</span><span class="p">,</span> <span class="nx">detail</span><span class="p">)</span> <span class="p">{</span>

  501.     <span class="kr">const</span> <span class="nx">event</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">CustomEvent</span><span class="p">(</span><span class="nx">type</span><span class="p">,</span> <span class="p">{</span> <span class="nx">detail</span><span class="o">:</span> <span class="nx">detail</span> <span class="p">})</span>

  502.     <span class="k">this</span><span class="p">.</span><span class="nx">dispatchEvent</span><span class="p">(</span><span class="nx">event</span><span class="p">)</span>

  503. <span class="p">}</span>

  504. <span class="nb">Array</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">trigger</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">type</span><span class="p">,</span> <span class="nx">detail</span><span class="p">)</span> <span class="p">{</span>

  505.     <span class="k">this</span><span class="p">.</span><span class="nx">forEach</span><span class="p">(</span><span class="nx">element</span> <span class="o">=&gt;</span> <span class="nx">element</span><span class="p">.</span><span class="nx">trigger</span><span class="p">(</span><span class="nx">type</span><span class="p">,</span> <span class="nx">detail</span><span class="p">))</span>

  506. <span class="p">}</span>

  507. <span class="nb">window</span><span class="p">.</span><span class="nx">$</span><span class="p">.</span><span class="nx">trigger</span> <span class="o">=</span> <span class="nb">window</span><span class="p">.</span><span class="nx">trigger</span><span class="p">.</span><span class="nx">bind</span><span class="p">(</span><span class="nb">document</span><span class="p">)</span>

  508. </pre></div>

  509. 

  510. 

  511. <p>Moins de 30 lignes pour réussir à avoir du JavaScript qui permette de sélectionner des éléments et d’y associer des évènements de manière plus simple dans un contexte didactique. Un tel code permettant ensuite d’écrire :</p>

  512. <div class="codehilite"><pre><span class="kd">function</span> <span class="nx">tests</span><span class="p">()</span> <span class="p">{</span>

  513.     <span class="c1">// Attaching/passing events for all titles.</span>

  514.     <span class="nx">$</span><span class="p">(</span><span class="s1">&#39;h1&#39;</span><span class="p">).</span><span class="nx">on</span><span class="p">(</span><span class="s1">&#39;changeColor&#39;</span><span class="p">,</span> <span class="nx">event</span> <span class="o">=&gt;</span> <span class="p">{</span>

  515.         <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="s1">&#39;changeColor received&#39;</span><span class="p">,</span> <span class="nx">event</span><span class="p">.</span><span class="nx">detail</span><span class="p">)</span>

  516.         <span class="nx">event</span><span class="p">.</span><span class="nx">target</span><span class="p">.</span><span class="nx">classList</span><span class="p">.</span><span class="nx">add</span><span class="p">(</span><span class="err">`</span><span class="nx">turn</span><span class="o">-</span><span class="nx">$</span><span class="p">{</span><span class="nx">event</span><span class="p">.</span><span class="nx">detail</span><span class="p">.</span><span class="nx">color</span><span class="p">}</span><span class="err">`</span><span class="p">)</span>

  517.     <span class="p">})</span>

  518.     <span class="nx">$</span><span class="p">(</span><span class="s1">&#39;h1&#39;</span><span class="p">).</span><span class="nx">on</span><span class="p">(</span><span class="s1">&#39;click&#39;</span><span class="p">,</span> <span class="nx">event</span> <span class="o">=&gt;</span> <span class="p">{</span>

  519.         <span class="c1">// Intentionally overcomplicated :-).</span>

  520.         <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="s1">&#39;changeColor triggered&#39;</span><span class="p">,</span> <span class="nx">event</span><span class="p">.</span><span class="nx">target</span><span class="p">)</span>

  521.         <span class="nx">event</span><span class="p">.</span><span class="nx">target</span><span class="p">.</span><span class="nx">trigger</span><span class="p">(</span><span class="s1">&#39;changeColor&#39;</span><span class="p">,</span> <span class="p">{</span><span class="nx">color</span><span class="o">:</span> <span class="nx">event</span><span class="p">.</span><span class="nx">target</span><span class="p">.</span><span class="nx">innerHTML</span><span class="p">})</span>

  522.     <span class="p">})</span>

  523.     <span class="c1">// Event delegation for a single item (works with many too).</span>

  524.     <span class="nx">$$</span><span class="p">(</span><span class="s1">&#39;ul&#39;</span><span class="p">).</span><span class="nx">on</span><span class="p">(</span><span class="s1">&#39;click&#39;</span><span class="p">,</span> <span class="s1">&#39;a&#39;</span><span class="p">,</span> <span class="nx">event</span> <span class="o">=&gt;</span> <span class="p">{</span>

  525.         <span class="nx">event</span><span class="p">.</span><span class="nx">preventDefault</span><span class="p">()</span>

  526.         <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="nx">event</span><span class="p">.</span><span class="nx">target</span><span class="p">.</span><span class="nx">innerHTML</span><span class="p">)</span>

  527.     <span class="p">})</span>

  528.     <span class="c1">// Anonymous pub/sub.</span>

  529.     <span class="nx">$</span><span class="p">.</span><span class="nx">on</span><span class="p">(</span><span class="s1">&#39;anonymousEvent&#39;</span><span class="p">,</span> <span class="nx">event</span> <span class="o">=&gt;</span> <span class="p">{</span>

  530.         <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="s1">&#39;anoynmous event received&#39;</span><span class="p">)</span>

  531.     <span class="p">})</span>

  532.     <span class="nx">$</span><span class="p">.</span><span class="nx">trigger</span><span class="p">(</span><span class="s1">&#39;anonymousEvent&#39;</span><span class="p">)</span>

  533. <span class="p">}</span>

  534. <span class="nx">on</span><span class="p">(</span><span class="s1">&#39;DOMContentLoaded&#39;</span><span class="p">,</span> <span class="nx">tests</span><span class="p">);</span>

  535. </pre></div>

  536. 

  537. 

  538. <p>C’est déjà mieux. Si je devais aller plus loin, je pense que je me tournerais vers des solutions comme <a href="http://riotjs.com/">RiotJS</a> qui ont une approche par composants web et une barrière à l’entrée relativement basse. Il y aurait du matériel pédagogique à créer dans ce domaine, peut-être plus utile qu’un n-ème <em>framework</em> JS/CSS.</p>

  539. <h2>Concepts et algorithmes</h2>

  540. <p>Ici le blocage se situe dans le découpage fonctionnel et la peur de la page blanche. Et aussi peut-être un peu dans l’appréhension qui entoure tout ce qui a trait au code.</p>

  541. <p>J’ai essayé de les faire travailler en amont, de leur fournir un canvas où ils n’avaient plus qu’à compléter les parties manquantes, de commencer par définir la logique avant de coder mais aucune des approche n’a vraiment portée ses fruits. La contrainte de temps était peut-être trop importante pour ce que j’ambitionnais mais pour introduire des interactions avec l’utilisateur il faut au moins savoir manipuler des éléments et y associer des évènements… sinon on reste dans la théorie.</p>

  542. <p><strong>Les savoirs s’acquièrent dans le temps, la pratique et la répétition. Il est difficile d’évaluer l’impact que l’on peut avoir dans une transmission.</strong> Parfois cette itération sera percutante, parfois elle se révèlera dans la durée, d’autres fois elle aura été complètement inutile. Ces interrogations sont probablement le quotidien de tout enseignant.</p>

  543. </article>

  544. 

  545. 

  546.   <figure class="image" property="schema:image">

  547.     <img src="/static/david/blog/2016/programmation-apprehension.jpg" alt="" />

  548.   </figure>

  549. 

  550. 

  551. 

  552. <nav id="jumpto">

  553.   <p>

  554.     <a rel=prev href="/david/blog/2016/reduire-experimenter-bouger/">← Réduire, expérimenter et bouger</a> | <a href="/david/blog/" title="Retour à la liste des expériences">↑</a> | <a rel=next href="/david/blog/2016/coorganisation-conferences/">Co-organisation de conférences →</a>

  555.   </p>

  556. </nav>

  557. 

  558. <footer>

  559.   <div>

  560.     <img src="/static/david/david-larlet-avatar.jpg" loading="lazy" class="avatar" width="200" height="200">

  561.     <p>

  562.       Bonjour/Hi!

  563.       Je suis <a href="/david/" title="Profil public">David&nbsp;Larlet</a>, je vis actuellement à Montréal et j’alimente cet espace depuis 15 ans. <br>

  564.       Si tu as apprécié cette lecture, n’hésite pas à poursuivre ton exploration. Par exemple via les <a href="/david/blog/" title="Expériences bienveillantes">réflexions bimestrielles</a>, la <a href="/david/stream/2019/" title="Pensées (dés)articulées">veille hebdomadaire</a> ou en t’abonnant au <a href="/david/log/" title="S’abonner aux publications via RSS">flux RSS</a> (<a href="/david/blog/2019/flux-rss/" title="Tiens c’est quoi un flux RSS ?">so 2005</a>).

  565.     </p>

  566.     <p>

  567.       Je m’intéresse à la place que je peux avoir dans ce monde. En tant qu’humain, en tant que membre d’une famille et en tant qu’associé d’une coopérative. De temps en temps, je fais aussi des <a href="https://github.com/davidbgk" title="Principalement sur Github mais aussi ailleurs">trucs techniques</a>. Et encore plus rarement, <a href="/david/talks/" title="En ce moment je laisse plutôt la place aux autres">j’en parle</a>.

  568.     </p>

  569. 

  570.       <p>

  571.         Les dernières publications hebdomadaires sont :

  572.       </p>

  573.       <ul class="with_columns">

  574. 

  575.           <li>

  576.             <a href="/david/stream/2019/12/31/">Merci</a>

  577.           </li>

  578. 

  579.           <li>

  580.             <a href="/david/stream/2019/12/27/">Intemporels</a>

  581.           </li>

  582. 

  583.           <li>

  584.             <a href="/david/stream/2019/12/24/">Outils</a>

  585.           </li>

  586. 

  587.           <li>

  588.             <a href="/david/stream/2019/12/17/">Origines</a>

  589.           </li>

  590. 

  591.           <li>

  592.             <a href="/david/stream/2019/12/10/">Publier</a>

  593.           </li>

  594. 

  595.           <li>

  596.             <a href="/david/stream/2019/12/03/">En forêt</a>

  597.           </li>

  598. 

  599.           <li>

  600.             <a href="/david/stream/2019/11/26/">Ecocentric</a>

  601.           </li>

  602. 

  603.           <li>

  604.             <a href="/david/stream/2019/11/19/">Se livrer</a>

  605.           </li>

  606. 

  607.           <li>

  608.             <a href="/david/stream/2019/11/12/">Dépendances</a>

  609.           </li>

  610. 

  611.           <li>

  612.             <a href="/david/stream/2019/11/05/">Positif</a>

  613.           </li>

  614. 

  615.           <li>

  616.             <a href="/david/stream/2019/10/29/">Dettes</a>

  617.           </li>

  618. 

  619.           <li>

  620.             <a href="/david/stream/2019/10/22/">Privilèges</a>

  621.           </li>

  622. 

  623.           <li>

  624.             <a href="/david/stream/2019/10/15/">Discrétion</a>

  625.           </li>

  626. 

  627.           <li>

  628.             <a href="/david/stream/2019/10/08/">Désespérance</a>

  629.           </li>

  630. 

  631.           <li>

  632.             <a href="/david/stream/2019/10/01/">Présent</a>

  633.           </li>

  634. 

  635.           <li>

  636.             <a href="/david/stream/2019/09/24/">Manifester</a>

  637.           </li>

  638. 

  639.           <li>

  640.             <a href="/david/stream/2019/09/17/">Arpenter</a>

  641.           </li>

  642. 

  643.           <li>

  644.             <a href="/david/stream/2019/09/10/">Nostalgie</a>

  645.           </li>

  646. 

  647.           <li>

  648.             <a href="/david/stream/2019/09/03/">Déconstruire</a>

  649.           </li>

  650. 

  651.           <li>

  652.             <a href="/david/stream/2019/08/27/">Documenter</a>

  653.           </li>

  654. 

  655.           <li>

  656.             <a href="/david/stream/2019/08/20/">Frustration</a>

  657.           </li>

  658. 

  659.           <li>

  660.             <a href="/david/stream/2019/08/13/">Holisme</a>

  661.           </li>

  662. 

  663.           <li>

  664.             <a href="/david/stream/2019/08/06/">1%</a>

  665.           </li>

  666. 

  667.           <li>

  668.             <a href="/david/stream/2019/07/30/">Exemplarité</a>

  669.           </li>

  670. 

  671.           <li>

  672.             <a href="/david/stream/2019/07/23/">Timelines</a>

  673.           </li>

  674. 

  675.           <li>

  676.             <a href="/david/stream/2019/07/16/">Écoute</a>

  677.           </li>

  678. 

  679.           <li>

  680.             <a href="/david/stream/2019/07/02/">Anxiété</a>

  681.           </li>

  682. 

  683.           <li>

  684.             <a href="/david/stream/2019/06/21/">À lier</a>

  685.           </li>

  686. 

  687.           <li>

  688.             <a href="/david/stream/2019/06/14/">Pauvreté</a>

  689.           </li>

  690. 

  691.           <li>

  692.             <a href="/david/stream/2019/06/07/">Amateur</a>

  693.           </li>

  694. 

  695.           <li>

  696.             <a href="/david/stream/2019/05/31/">Pollution</a>

  697.           </li>

  698. 

  699.           <li>

  700.             <a href="/david/stream/2019/05/24/">Apaisement</a>

  701.           </li>

  702. 

  703.           <li>

  704.             <a href="/david/stream/2019/05/10/">Folie</a>

  705.           </li>

  706. 

  707.           <li>

  708.             <a href="/david/stream/2019/05/03/">Sympathie</a>

  709.           </li>

  710. 

  711.           <li>

  712.             <a href="/david/stream/2019/04/12/">Péremption</a>

  713.           </li>

  714. 

  715.           <li>

  716.             <a href="/david/stream/2019/04/05/">Définitions</a>

  717.           </li>

  718. 

  719.           <li>

  720.             <a href="/david/stream/2019/03/29/">Acceptation</a>

  721.           </li>

  722. 

  723.           <li>

  724.             <a href="/david/stream/2019/03/22/">Dissonance</a>

  725.           </li>

  726. 

  727.           <li>

  728.             <a href="/david/stream/2019/03/15/">Reconnaissance</a>

  729.           </li>

  730. 

  731.           <li>

  732.             <a href="/david/stream/2019/03/08/">Lecture</a>

  733.           </li>

  734. 

  735.           <li>

  736.             <a href="/david/stream/2019/03/01/">Journaux</a>

  737.           </li>

  738. 

  739.           <li>

  740.             <a href="/david/stream/2019/02/22/">Écriture</a>

  741.           </li>

  742. 

  743.           <li>

  744.             <a href="/david/stream/2019/02/15/">Kyriarchie</a>

  745.           </li>

  746. 

  747.           <li>

  748.             <a href="/david/stream/2019/02/08/">Mots-serrures</a>

  749.           </li>

  750. 

  751.           <li>

  752.             <a href="/david/stream/2019/02/01/">Sans voie</a>

  753.           </li>

  754. 

  755.           <li>

  756.             <a href="/david/stream/2019/01/25/">Auto-diagnostic</a>

  757.           </li>

  758. 

  759.           <li>

  760.             <a href="/david/stream/2019/01/18/">Agilité</a>

  761.           </li>

  762. 

  763.           <li>

  764.             <a href="/david/stream/2019/01/11/">Métaphores</a>

  765.           </li>

  766. 

  767.           <li>

  768.             <a href="/david/stream/2019/01/04/">Balbutiements</a>

  769.           </li>

  770. 

  771.       </ul>

  772. 

  773.     <p>

  774.       Voici quelques articles choisis :

  775.       <a href="/david/blog/2019/faire-equipe/" title="Accéder à l’article complet">Faire équipe</a>,

  776.       <a href="/david/blog/2018/bivouac-automnal/" title="Accéder à l’article complet">Bivouac automnal</a>,

  777.       <a href="/david/blog/2018/commodite-effondrement/" title="Accéder à l’article complet">Commodité et effondrement</a>,

  778.       <a href="/david/blog/2017/donnees-communs/" title="Accéder à l’article complet">Des données aux communs</a>,

  779.       <a href="/david/blog/2016/accompagner-enfant/" title="Accéder à l’article complet">Accompagner un enfant</a>,

  780.       <a href="/david/blog/2016/senior-developer/" title="Accéder à l’article complet">Senior developer</a>,

  781.       <a href="/david/blog/2016/illusion-sociale/" title="Accéder à l’article complet">L’illusion sociale</a>,

  782.       <a href="/david/blog/2016/instantane-scopyleft/" title="Accéder à l’article complet">Instantané Scopyleft</a>,

  783.       <a href="/david/blog/2016/enseigner-web/" title="Accéder à l’article complet">Enseigner le Web</a>,

  784.       <a href="/david/blog/2016/simplicite-defaut/" title="Accéder à l’article complet">Simplicité par défaut</a>,

  785.       <a href="/david/blog/2016/minimalisme-esthetique/" title="Accéder à l’article complet">Minimalisme et esthétique</a>,

  786.       <a href="/david/blog/2014/un-web-omni-present/" title="Accéder à l’article complet">Un web omni-présent</a>,

  787.       <a href="/david/blog/2014/manifeste-developpeur/" title="Accéder à l’article complet">Manifeste de développeur</a>,

  788.       <a href="/david/blog/2013/confort-convivialite/" title="Accéder à l’article complet">Confort et convivialité</a>,

  789.       <a href="/david/blog/2013/testament-numerique/" title="Accéder à l’article complet">Testament numérique</a>,

  790.       et <a href="/david/blog/" title="Accéder aux archives">bien d’autres…</a>

  791.     </p>

  792.     <p>

  793.       On peut <a href="mailto:david%40larlet.fr" title="Envoyer un courriel">échanger par courriel</a>. Si éventuellement tu souhaites que l’on travaille ensemble, tu devrais commencer par consulter le <a href="http://larlet.com">profil dédié à mon activité professionnelle</a> et/ou contacter directement <a href="http://scopyleft.fr/">scopyleft</a>, la <abbr title="Société coopérative et participative">SCOP</abbr> dont je fais partie depuis six ans. Je recommande au préalable de lire <a href="/david/blog/2018/cout-site/" title="Attention ce qui va suivre peut vous choquer">combien coûte un site</a> et pourquoi je suis plutôt favorable à une <a href="/david/pro/devis/" title="Discutons-en !">non-demande de devis</a>.

  794.     </p>

  795.     <p>

  796.       Je ne traque pas ta navigation mais mon

  797.       <abbr title="Alwaysdata, 62 rue Tiquetonne 75002 Paris, +33.184162340">hébergeur</abbr>

  798.       conserve des logs d’accès.

  799.     </p>

  800.   </div>

  801. </footer>

  802. <script type="text/javascript">

  803.   ;(_ => {

  804.     const jumper = document.getElementById('jumper')

  805.     jumper.addEventListener('click', e => {

  806.       e.preventDefault()

  807.       const anchor = e.target.getAttribute('href')

  808.       const targetEl = document.getElementById(anchor.substring(1))

  809.       targetEl.scrollIntoView({behavior: 'smooth'})

  810.     })

  811.   })()

  812. </script>

  813. 

  814.   <script>

  815.   /* Service workers */

  816.   if (navigator.serviceWorker) {

  817.     window.addEventListener('load', function () {

  818.       var selector = 'a[href^="/david/cache/"], a[rel=prev], a[rel=next]'

  819.       function sendLinks (selector) {

  820.         var links = [].slice.call(document.querySelectorAll(selector)).map(function (link) {

  821.           return link.getAttribute('href')

  822.         })

  823.         links.push(location.pathname)  // Put the current page in cache too.

  824.         navigator.serviceWorker.controller.postMessage({ links: links })

  825.       }

  826.       navigator.serviceWorker.getRegistration()

  827.         .then(function (registration) {

  828.           if (!registration || !navigator.serviceWorker.controller) {

  829.             return navigator.serviceWorker.register('/serviceworker.js')

  830.               .then(navigator.serviceWorker.ready)

  831.               .then(function () {

  832.                 console.log('[ServiceWorker] Ready to go!')

  833.               })

  834.               .catch(console.error.bind(console))

  835.           } else {

  836.             console.log('[ServiceWorker] Send links via registration')

  837.             sendLinks(selector)

  838.           }

  839.         })

  840.       navigator.serviceWorker.addEventListener('controllerchange', function () {

  841.         console.log('[ServiceWorker] Send links via controller change')

  842.         sendLinks(selector)

  843.       })

  844.       navigator.serviceWorker.addEventListener('message', function (event) {

  845.         var link = document.querySelector('a[href="' + event.data.link + '"]')

  846.         if (event.data.status && link) {

  847.           link.style.backgroundColor = '#2d7474'

  848.           link.style.color = '#f0f0ea'

  849. 

  850.             link.setAttribute('title', 'En cache pour consultation sans connexion')

  851. 

  852.         }

  853.       })

  854.     })

  855.   } else {

  856.     console.warn('[ServiceWorker] No cache for old browsers.')

  857.   }

  858. </script>