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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang xml:lang>
<head>
<meta charset="utf-8" />
<meta name="generator" content="pandoc" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" />
<title>Codebraid with JavaScript</title>
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code.sourceCode > span { color: inherit; text-decoration: inherit; }
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<!--[if lt IE 9]>
<script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv-printshiv.min.js"></script>
<![endif]-->
</head>
<body>
<header id="title-block-header">
<h1 class="title">Codebraid with JavaScript</h1>
</header>
<h2 id="inline-code">Inline code</h2>
<h3 id="run">Run</h3>
<p>Inline code with <code>.cb-run</code> gives raw stdout. While the
language can be specified with <code>.javascript</code>,
<code>.js</code> works as well.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>`console.log(1 + 2);`{.js .cb-run}</code></pre>
</div>
<div class="exampleOutput">
<p>3</p>
</div>
</div>
<h3 id="expression-and-inline-notebook">Expression and inline
notebook</h3>
<p>Inline code with <code>.cb-expr</code> evaluates an expression and
then inserts the raw output into the document, where it is interpreted
as Markdown. Inline code with <code>.cb-nb</code> (<code>nb</code> is
short for <code>notebook</code>) is similar, except output is shown
verbatim.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>`` `\$2^8 = ${2**8}\$` ``{.js .cb-expr}</code></pre>
</div>
<div class="exampleOutput">
<p><span class="math inline">2<sup>8</sup> = 256</span></p>
</div>
</div>
<div class="example">
<div class="exampleMarkup">
<pre><code>`4*16`{.js .cb-nb}</code></pre>
</div>
<div class="exampleOutput">
<p><code class="expr">64</code></p>
</div>
</div>
<h3 id="stderr">Stderr</h3>
<p>In the event of an error, inline code automatically shows stderr by
default. This code is executed in its own session,
<code>inline_error</code>, so that it does not impact other
examples.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>`console.logs(1 + 2);`{.js .cb-run session=inline_error}</code></pre>
</div>
<div class="exampleOutput">
<p><code class="stderr error"><string>:1 console.logs(1 + 2); ^ TypeError: console.logs is not a function at Object.<anonymous> (<string>:1:9) at Module._compile (node:internal/modules/cjs/loader:1254:14) at Module._extensions..js (node:internal/modules/cjs/loader:1308:10) at Module.load (node:internal/modules/cjs/loader:1117:32) at Module._load (node:internal/modules/cjs/loader:958:12) at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12) at node:internal/main/run_main_module:23:47 Node.js v18.15.0</code></p>
</div>
</div>
<h2 id="block-code">Block code</h2>
<h3 id="run-1">Run</h3>
<p>Code blocks with <code>.cb-run</code> give raw stdout. There is
continuity between code blocks so long as they are in the same session;
variables persist.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.js .cb-run}
message = "Hello from *JavaScript!*";
```</code></pre>
</div>
</div>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.js .cb-run}
console.log(message);
```</code></pre>
</div>
<div class="exampleOutput">
<p>Hello from <em>JavaScript!</em></p>
</div>
</div>
<h3 id="notebook">Notebook</h3>
<p>Code blocks with <code>.cb-nb</code> show the code and also the
verbatim stdout.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.js .cb-nb session=notebook}
function pows_of_two(start, end) {
n = 2;
x = start;
while (x < end) {
process.stdout.write(String(2**x) + ", ");
x += 1;
}
console.log(2**end);
}
pows_of_two(1, 9);
pows_of_two(1, 15);
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb8" data-startFrom="1"><pre class="sourceCode numberSource js numberLines"><code class="sourceCode javascript"><span id="cb8-1"><a href="#cb8-1"></a><span class="kw">function</span> <span class="fu">pows_of_two</span>(start<span class="op">,</span> end) {</span>
<span id="cb8-2"><a href="#cb8-2"></a> n <span class="op">=</span> <span class="dv">2</span><span class="op">;</span></span>
<span id="cb8-3"><a href="#cb8-3"></a> x <span class="op">=</span> start<span class="op">;</span></span>
<span id="cb8-4"><a href="#cb8-4"></a> <span class="cf">while</span> (x <span class="op"><</span> end) {</span>
<span id="cb8-5"><a href="#cb8-5"></a> <span class="bu">process</span><span class="op">.</span><span class="at">stdout</span><span class="op">.</span><span class="fu">write</span>(<span class="bu">String</span>(<span class="dv">2</span><span class="op">**</span>x) <span class="op">+</span> <span class="st">", "</span>)<span class="op">;</span></span>
<span id="cb8-6"><a href="#cb8-6"></a> x <span class="op">+=</span> <span class="dv">1</span><span class="op">;</span></span>
<span id="cb8-7"><a href="#cb8-7"></a> }</span>
<span id="cb8-8"><a href="#cb8-8"></a> <span class="bu">console</span><span class="op">.</span><span class="fu">log</span>(<span class="dv">2</span><span class="op">**</span>end)<span class="op">;</span></span>
<span id="cb8-9"><a href="#cb8-9"></a>}</span>
<span id="cb8-10"><a href="#cb8-10"></a><span class="fu">pows_of_two</span>(<span class="dv">1</span><span class="op">,</span> <span class="dv">9</span>)<span class="op">;</span></span>
<span id="cb8-11"><a href="#cb8-11"></a><span class="fu">pows_of_two</span>(<span class="dv">1</span><span class="op">,</span> <span class="dv">15</span>)<span class="op">;</span></span></code></pre></div>
<pre class="stdout"><code>2, 4, 8, 16, 32, 64, 128, 256, 512
2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768</code></pre>
</div>
</div>
<h3 id="stderr-1">Stderr</h3>
<p>Code blocks show stderr automatically by default.</p>
<div class="example">
<div class="exampleMarkup">
<pre><code>```{.js .cb-nb session=block_error}
x = 1 + ;
```</code></pre>
</div>
<div class="exampleOutput">
<div class="sourceCode" id="cb11" data-startFrom="1"><pre class="sourceCode numberSource js numberLines"><code class="sourceCode javascript"><span id="cb11-1"><a href="#cb11-1"></a>x <span class="op">=</span> <span class="dv">1</span> <span class="op">+</span> <span class="op">;</span></span></code></pre></div>
<pre class="stderr error"><code>source.js:1
x = 1 + ;
^
SyntaxError: Unexpected token ';'
at internalCompileFunction (node:internal/vm:73:18)
at wrapSafe (node:internal/modules/cjs/loader:1176:20)
at Module._compile (node:internal/modules/cjs/loader:1218:27)
at Module._extensions..js (node:internal/modules/cjs/loader:1308:10)
at Module.load (node:internal/modules/cjs/loader:1117:32)
at Module._load (node:internal/modules/cjs/loader:958:12)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
at node:internal/main/run_main_module:23:47
Node.js v18.15.0</code></pre>
</div>
</div>
</body>
</html>