<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>JavaScript | Ben Ahlbrand CV</title><link>https://benjamin.ahlbrand.me/tags/javascript/</link><atom:link href="https://benjamin.ahlbrand.me/tags/javascript/index.xml" rel="self" type="application/rss+xml"/><description>JavaScript</description><generator>Hugo Blox Builder (https://hugoblox.com)</generator><language>en-us</language><lastBuildDate>Tue, 24 Oct 2023 00:00:00 +0000</lastBuildDate><image><url>https://benjamin.ahlbrand.me/media/sharing.png</url><title>JavaScript</title><link>https://benjamin.ahlbrand.me/tags/javascript/</link></image><item><title>Learn JavaScript</title><link>https://benjamin.ahlbrand.me/teaching/js/</link><pubDate>Tue, 24 Oct 2023 00:00:00 +0000</pubDate><guid>https://benjamin.ahlbrand.me/teaching/js/</guid><description>&lt;p>&lt;a href="https://hugoblox.com" target="_blank" rel="noopener">Hugo Blox Builder&lt;/a> is designed to give technical content creators a seamless experience. You can focus on the content and the Hugo Blox Builder which this template is built upon handles the rest.&lt;/p>
&lt;p>&lt;strong>Embed videos, podcasts, code, LaTeX math, and even test students!&lt;/strong>&lt;/p>
&lt;p>On this page, you&amp;rsquo;ll find some examples of the types of technical content that can be rendered with Hugo Blox.&lt;/p>
&lt;h2 id="video">Video&lt;/h2>
&lt;p>Teach your course by sharing videos with your students. Choose from one of the following approaches:&lt;/p>
&lt;div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;">
&lt;iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen="allowfullscreen" loading="eager" referrerpolicy="strict-origin-when-cross-origin" src="https://www.youtube.com/embed/D2vj0WcvH5c?autoplay=0&amp;amp;controls=1&amp;amp;end=0&amp;amp;loop=0&amp;amp;mute=0&amp;amp;start=0" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" title="YouTube video">&lt;/iframe>
&lt;/div>
&lt;p>&lt;strong>Youtube&lt;/strong>:&lt;/p>
&lt;pre>&lt;code>{{&amp;lt; youtube w7Ft2ymGmfc &amp;gt;}}
&lt;/code>&lt;/pre>
&lt;p>&lt;strong>Bilibili&lt;/strong>:&lt;/p>
&lt;pre>&lt;code>{{&amp;lt; bilibili id=&amp;quot;BV1WV4y1r7DF&amp;quot; &amp;gt;}}
&lt;/code>&lt;/pre>
&lt;p>&lt;strong>Video file&lt;/strong>&lt;/p>
&lt;p>Videos may be added to a page by either placing them in your &lt;code>assets/media/&lt;/code> media library or in your &lt;a href="https://gohugo.io/content-management/page-bundles/" target="_blank" rel="noopener">page&amp;rsquo;s folder&lt;/a>, and then embedding them with the &lt;em>video&lt;/em> shortcode:&lt;/p>
&lt;pre>&lt;code>{{&amp;lt; video src=&amp;quot;my_video.mp4&amp;quot; controls=&amp;quot;yes&amp;quot; &amp;gt;}}
&lt;/code>&lt;/pre>
&lt;h2 id="podcast">Podcast&lt;/h2>
&lt;p>You can add a podcast or music to a page by placing the MP3 file in the page&amp;rsquo;s folder or the media library folder and then embedding the audio on your page with the &lt;em>audio&lt;/em> shortcode:&lt;/p>
&lt;pre>&lt;code>{{&amp;lt; audio src=&amp;quot;ambient-piano.mp3&amp;quot; &amp;gt;}}
&lt;/code>&lt;/pre>
&lt;p>Try it out:&lt;/p>
&lt;audio controls >
&lt;source src="https://benjamin.ahlbrand.me/teaching/js/ambient-piano.mp3" type="audio/mpeg">
&lt;/audio>
&lt;h2 id="test-students">Test students&lt;/h2>
&lt;p>Provide a simple yet fun self-assessment by revealing the solutions to challenges with the &lt;code>spoiler&lt;/code> shortcode:&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-markdown" data-lang="markdown">&lt;span class="line">&lt;span class="cl">{{&lt;span class="p">&amp;lt;&lt;/span> &lt;span class="nt">spoiler&lt;/span> &lt;span class="na">text&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="s">&amp;#34;👉 Click to view the solution&amp;#34;&lt;/span> &lt;span class="p">&amp;gt;&lt;/span>}}
&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">You found me!
&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">{{&lt;span class="p">&amp;lt;&lt;/span> &lt;span class="p">/&lt;/span>&lt;span class="nt">spoiler&lt;/span> &lt;span class="p">&amp;gt;&lt;/span>}}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>renders as&lt;/p>
&lt;details class="spoiler " id="spoiler-2">
&lt;summary class="cursor-pointer">👉 Click to view the solution&lt;/summary>
&lt;div class="rounded-lg bg-neutral-50 dark:bg-neutral-800 p-2">
You found me 🎉
&lt;/div>
&lt;/details>
&lt;h2 id="math">Math&lt;/h2>
&lt;p>Hugo Blox Builder supports a Markdown extension for $\LaTeX$ math. You can enable this feature by toggling the &lt;code>math&lt;/code> option in your &lt;code>config/_default/params.yaml&lt;/code> file.&lt;/p>
&lt;p>To render &lt;em>inline&lt;/em> or &lt;em>block&lt;/em> math, wrap your LaTeX math with &lt;code>{{&amp;lt; math &amp;gt;}}$...${{&amp;lt; /math &amp;gt;}}&lt;/code> or &lt;code>{{&amp;lt; math &amp;gt;}}$$...$${{&amp;lt; /math &amp;gt;}}&lt;/code>, respectively.&lt;/p>
&lt;div class="flex px-4 py-3 mb-6 rounded-md bg-primary-100 dark:bg-primary-900">
&lt;span class="pr-3 pt-1 text-primary-600 dark:text-primary-300">
&lt;svg height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">&lt;path fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="m11.25 11.25l.041-.02a.75.75 0 0 1 1.063.852l-.708 2.836a.75.75 0 0 0 1.063.853l.041-.021M21 12a9 9 0 1 1-18 0a9 9 0 0 1 18 0m-9-3.75h.008v.008H12z"/>&lt;/svg>
&lt;/span>
&lt;span class="dark:text-neutral-300">We wrap the LaTeX math in the Hugo Blox &lt;em>math&lt;/em> shortcode to prevent Hugo rendering our math as Markdown.&lt;/span>
&lt;/div>
&lt;p>Example &lt;strong>math block&lt;/strong>:&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-latex" data-lang="latex">&lt;span class="line">&lt;span class="cl">&lt;span class="nb">{{&lt;/span>&amp;lt; math &amp;gt;&lt;span class="nb">}}&lt;/span>
&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="sb">$$&lt;/span>&lt;span class="nb">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">&lt;/span>&lt;span class="nv">\gamma&lt;/span>&lt;span class="nb">_{n} &lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="nv">\frac&lt;/span>&lt;span class="nb">{ &lt;/span>&lt;span class="nv">\left&lt;/span>&lt;span class="nb"> | &lt;/span>&lt;span class="nv">\left&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="o">(&lt;/span>&lt;span class="nv">\mathbf&lt;/span>&lt;span class="nb"> x_{n} &lt;/span>&lt;span class="o">-&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="nv">\mathbf&lt;/span>&lt;span class="nb"> x_{n&lt;/span>&lt;span class="o">-&lt;/span>&lt;span class="m">1&lt;/span>&lt;span class="nb">} &lt;/span>&lt;span class="nv">\right&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="o">)&lt;/span>&lt;span class="nb">^T &lt;/span>&lt;span class="nv">\left&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="o">[&lt;/span>&lt;span class="nv">\nabla&lt;/span>&lt;span class="nb"> F &lt;/span>&lt;span class="o">(&lt;/span>&lt;span class="nv">\mathbf&lt;/span>&lt;span class="nb"> x_{n}&lt;/span>&lt;span class="o">)&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="o">-&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="nv">\nabla&lt;/span>&lt;span class="nb"> F &lt;/span>&lt;span class="o">(&lt;/span>&lt;span class="nv">\mathbf&lt;/span>&lt;span class="nb"> x_{n&lt;/span>&lt;span class="o">-&lt;/span>&lt;span class="m">1&lt;/span>&lt;span class="nb">}&lt;/span>&lt;span class="o">)&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="nv">\right&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="o">]&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="nv">\right&lt;/span>&lt;span class="nb"> |}{&lt;/span>&lt;span class="nv">\left&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="nv">\|\nabla&lt;/span>&lt;span class="nb"> F&lt;/span>&lt;span class="o">(&lt;/span>&lt;span class="nv">\mathbf&lt;/span>&lt;span class="nb">{x}_{n}&lt;/span>&lt;span class="o">)&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="o">-&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="nv">\nabla&lt;/span>&lt;span class="nb"> F&lt;/span>&lt;span class="o">(&lt;/span>&lt;span class="nv">\mathbf&lt;/span>&lt;span class="nb">{x}_{n&lt;/span>&lt;span class="o">-&lt;/span>&lt;span class="m">1&lt;/span>&lt;span class="nb">}&lt;/span>&lt;span class="o">)&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="nv">\right&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="nv">\|&lt;/span>&lt;span class="nb">^&lt;/span>&lt;span class="m">2&lt;/span>&lt;span class="nb">}
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">&lt;/span>&lt;span class="s">$$&lt;/span>
&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">{{&lt;/span>&amp;lt; /math &amp;gt;&lt;span class="nb">}}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>renders as&lt;/p>
$$\gamma_{n} = \frac{ \left | \left (\mathbf x_{n} - \mathbf x_{n-1} \right )^T \left [\nabla F (\mathbf x_{n}) - \nabla F (\mathbf x_{n-1}) \right ] \right |}{\left \|\nabla F(\mathbf{x}_{n}) - \nabla F(\mathbf{x}_{n-1}) \right \|^2}$$
&lt;p>Example &lt;strong>inline math&lt;/strong> &lt;code>{{&amp;lt; math &amp;gt;}}$\nabla F(\mathbf{x}_{n})${{&amp;lt; /math &amp;gt;}}&lt;/code> renders as $\nabla F(\mathbf{x}_{n})$
.&lt;/p>
&lt;p>Example &lt;strong>multi-line math&lt;/strong> using the math linebreak (&lt;code>\\&lt;/code>):&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-latex" data-lang="latex">&lt;span class="line">&lt;span class="cl">&lt;span class="nb">{{&lt;/span>&amp;lt; math &amp;gt;&lt;span class="nb">}}&lt;/span>
&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="sb">$$&lt;/span>&lt;span class="nb">f&lt;/span>&lt;span class="o">(&lt;/span>&lt;span class="nb">k;p_{&lt;/span>&lt;span class="m">0&lt;/span>&lt;span class="nb">}^{&lt;/span>&lt;span class="o">*&lt;/span>&lt;span class="nb">}&lt;/span>&lt;span class="o">)&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="nb"> &lt;/span>&lt;span class="nv">\begin&lt;/span>&lt;span class="nb">{cases}p_{&lt;/span>&lt;span class="m">0&lt;/span>&lt;span class="nb">}^{&lt;/span>&lt;span class="o">*&lt;/span>&lt;span class="nb">} &amp;amp; &lt;/span>&lt;span class="nv">\text&lt;/span>&lt;span class="nb">{if }k&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">1&lt;/span>&lt;span class="nb">, &lt;/span>&lt;span class="nv">\\&lt;/span>&lt;span class="nb">
&lt;/span>&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">&lt;/span>&lt;span class="m">1&lt;/span>&lt;span class="o">-&lt;/span>&lt;span class="nb">p_{&lt;/span>&lt;span class="m">0&lt;/span>&lt;span class="nb">}^{&lt;/span>&lt;span class="o">*&lt;/span>&lt;span class="nb">} &amp;amp; &lt;/span>&lt;span class="nv">\text&lt;/span>&lt;span class="nb">{if }k&lt;/span>&lt;span class="o">=&lt;/span>&lt;span class="m">0&lt;/span>&lt;span class="nb">.&lt;/span>&lt;span class="nv">\end&lt;/span>&lt;span class="nb">{cases}&lt;/span>&lt;span class="s">$$&lt;/span>
&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="nb">{{&lt;/span>&amp;lt; /math &amp;gt;&lt;span class="nb">}}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>renders as&lt;/p>
$$
f(k;p_{0}^{*}) = \begin{cases}p_{0}^{*} &amp; \text{if }k=1, \\
1-p_{0}^{*} &amp; \text{if }k=0.\end{cases}
$$
&lt;h2 id="code">Code&lt;/h2>
&lt;p>Hugo Blox Builder utilises Hugo&amp;rsquo;s Markdown extension for highlighting code syntax. The code theme can be selected in the &lt;code>config/_default/params.yaml&lt;/code> file.&lt;/p>
&lt;pre>&lt;code>```python
import pandas as pd
data = pd.read_csv(&amp;quot;data.csv&amp;quot;)
data.head()
```
&lt;/code>&lt;/pre>
&lt;p>renders as&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-python" data-lang="python">&lt;span class="line">&lt;span class="cl">&lt;span class="kn">import&lt;/span> &lt;span class="nn">pandas&lt;/span> &lt;span class="k">as&lt;/span> &lt;span class="nn">pd&lt;/span>
&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="n">data&lt;/span> &lt;span class="o">=&lt;/span> &lt;span class="n">pd&lt;/span>&lt;span class="o">.&lt;/span>&lt;span class="n">read_csv&lt;/span>&lt;span class="p">(&lt;/span>&lt;span class="s2">&amp;#34;data.csv&amp;#34;&lt;/span>&lt;span class="p">)&lt;/span>
&lt;/span>&lt;/span>&lt;span class="line">&lt;span class="cl">&lt;span class="n">data&lt;/span>&lt;span class="o">.&lt;/span>&lt;span class="n">head&lt;/span>&lt;span class="p">()&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="inline-images">Inline Images&lt;/h2>
&lt;div class="highlight">&lt;pre tabindex="0" class="chroma">&lt;code class="language-go" data-lang="go">&lt;span class="line">&lt;span class="cl">&lt;span class="p">{{&amp;lt;&lt;/span> &lt;span class="nx">icon&lt;/span> &lt;span class="nx">name&lt;/span>&lt;span class="p">=&lt;/span>&lt;span class="s">&amp;#34;python&amp;#34;&lt;/span> &lt;span class="p">&amp;gt;}}&lt;/span> &lt;span class="nx">Python&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>renders as&lt;/p>
&lt;p>
&lt;span class="inline-block pr-1">
&lt;svg style="height: 1em; transform: translateY(0.1em);" xmlns="http://www.w3.org/2000/svg" height="1em" viewBox="0 0 448 512" fill="currentColor">&lt;path d="M439.8 200.5c-7.7-30.9-22.3-54.2-53.4-54.2h-40.1v47.4c0 36.8-31.2 67.8-66.8 67.8H172.7c-29.2 0-53.4 25-53.4 54.3v101.8c0 29 25.2 46 53.4 54.3 33.8 9.9 66.3 11.7 106.8 0 26.9-7.8 53.4-23.5 53.4-54.3v-40.7H226.2v-13.6h160.2c31.1 0 42.6-21.7 53.4-54.2 11.2-33.5 10.7-65.7 0-108.6zM286.2 404c11.1 0 20.1 9.1 20.1 20.3 0 11.3-9 20.4-20.1 20.4-11 0-20.1-9.2-20.1-20.4.1-11.3 9.1-20.3 20.1-20.3zM167.8 248.1h106.8c29.7 0 53.4-24.5 53.4-54.3V91.9c0-29-24.4-50.7-53.4-55.6-35.8-5.9-74.7-5.6-106.8.1-45.2 8-53.4 24.7-53.4 55.6v40.7h106.9v13.6h-147c-31.1 0-58.3 18.7-66.8 54.2-9.8 40.7-10.2 66.1 0 108.6 7.6 31.6 25.7 54.2 56.8 54.2H101v-48.8c0-35.3 30.5-66.4 66.8-66.4zm-6.7-142.6c-11.1 0-20.1-9.1-20.1-20.3.1-11.3 9-20.4 20.1-20.4 11 0 20.1 9.2 20.1 20.4s-9 20.3-20.1 20.3z"/>&lt;/svg>
&lt;/span> Python&lt;/p>
&lt;h2 id="did-you-find-this-page-helpful-consider-sharing-it-">Did you find this page helpful? Consider sharing it 🙌&lt;/h2></description></item><item><title>Metaroom</title><link>https://benjamin.ahlbrand.me/post/2021-12-09-metaroo/</link><pubDate>Mon, 09 Dec 2019 00:00:00 +0000</pubDate><guid>https://benjamin.ahlbrand.me/post/2021-12-09-metaroo/</guid><description>&lt;p>I led development of a social VR co-located framework we used to teach Ken Perlin&amp;rsquo;s graduate Computer Graphics students to work in VR. Every group was able to create their own 1 to 1 &amp;ldquo;meta(verse)&amp;rdquo; room mapped networked experience to share with up to 64 other participants. We provided facilities for networking, interaction primitives, stereo rendering, spatial audio, and room scale mapping, to great results! This was an event driven javascript framework we built from the ground up in WebVR.&lt;/p>
&lt;p>We collaborated with Oculus Education for the headsets and the School of Visual Arts in NYC to bring these experiences to life.&lt;/p>
&lt;p>&lt;strong>Check out the project page here:&lt;/strong>&lt;/p>
&lt;p>&lt;a href="https://frl.nyu.edu/metaroom/" target="_blank" rel="noopener">https://frl.nyu.edu/metaroom/&lt;/a>&lt;/p></description></item></channel></rss>