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Angelos Chalaris
2018-04-07 19:10:42 +03:00
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docs/adapter.html
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<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Adapter - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><script>const search = (node) => {
<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Adapter - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta name="theme-color" content="#111"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><link rel="manifest" href="manifest.json"><script>const search = (node) => {
let matchingTags = [];
Array.from(node.parentElement.parentElement.getElementsByTagName('a')).forEach(x => {
let data = [x.textContent.toLowerCase(), ...x.getAttribute('tags').split(',')].map(v => !!(v.indexOf(node.value.toLowerCase()) + 1));

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docs/array.html
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<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Array - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><script>const search = (node) => {
<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Array - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta name="theme-color" content="#111"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><link rel="manifest" href="manifest.json"><script>const search = (node) => {
let matchingTags = [];
Array.from(node.parentElement.parentElement.getElementsByTagName('a')).forEach(x => {
let data = [x.textContent.toLowerCase(), ...x.getAttribute('tags').split(',')].map(v => !!(v.indexOf(node.value.toLowerCase()) + 1));

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docs/beginner.html
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<meta charset="utf-8">
<meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less.">
<meta name="keywords" content="javascript, snippets, code, programming">
<meta name="author" content="Stefan Feješ (ns.fejes.stefan@gmail.com)">
<meta name="author" content="Stefan Feješ (stefanfejes.com)">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="theme-color" content="#111">
<meta property="og:title" content="30 seconds of code">
<meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less." />
<meta property="og:type" content="website" /><meta property="og:image" content="favicon.png">
<link rel="icon" type="image/png" href="favicon.png">
<link rel="icon" type="image/png" href="favicon.png"><link rel="manifest" href="manifest.json">
<script>
function scrollToTop(){
const c = document.querySelector('html').scrollTop;

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docs/browser.html
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<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Browser - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><script>const search = (node) => {
<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Browser - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta name="theme-color" content="#111"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><link rel="manifest" href="manifest.json"><script>const search = (node) => {
let matchingTags = [];
Array.from(node.parentElement.parentElement.getElementsByTagName('a')).forEach(x => {
let data = [x.textContent.toLowerCase(), ...x.getAttribute('tags').split(',')].map(v => !!(v.indexOf(node.value.toLowerCase()) + 1));

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docs/date.html
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<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Date - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><script>const search = (node) => {
<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Date - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta name="theme-color" content="#111"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><link rel="manifest" href="manifest.json"><script>const search = (node) => {
let matchingTags = [];
Array.from(node.parentElement.parentElement.getElementsByTagName('a')).forEach(x => {
let data = [x.textContent.toLowerCase(), ...x.getAttribute('tags').split(',')].map(v => !!(v.indexOf(node.value.toLowerCase()) + 1));

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docs/function.html
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<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Function - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><script>const search = (node) => {
<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Function - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta name="theme-color" content="#111"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><link rel="manifest" href="manifest.json"><script>const search = (node) => {
let matchingTags = [];
Array.from(node.parentElement.parentElement.getElementsByTagName('a')).forEach(x => {
let data = [x.textContent.toLowerCase(), ...x.getAttribute('tags').split(',')].map(v => !!(v.indexOf(node.value.toLowerCase()) + 1));

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docs/index.html
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<meta name="keywords" content="javascript, snippets, code, programming">
<meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)">
<meta name="viewport" content="width=device-width, initial-scale=1">
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</head>
<body>
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@ -73,58 +74,40 @@
<h2 class="index-section">Today's picks</h2>
<p>Our sophisticated robot helpers pick new snippets from our collection daily, so that you can discover new snippets to enhance your projects:</p>
<div id="pick-slider">
<button class="next"><svg version="1.1" width="8" height="16" viewBox="0 0 8 16" class="octicon octicon-chevron-right" aria-hidden="true"><path fill-rule="evenodd" d="M7.5 8l-5 5L1 11.5 4.75 8 1 4.5 2.5 3l5 5z"/></svg></button>
<button class="previous"><svg version="1.1" width="8" height="16" viewBox="0 0 8 16" class="octicon octicon-chevron-left" aria-hidden="true"><path fill-rule="evenodd" d="M6 3l1.5 1.5L3.75 8l3.75 3.5L6 13 1 8l5-5z"/></svg></button>
<div class="card fluid pick selected"><h3 id="rgbtohex.md" class="section double-padded">RGBToHex</h3><div class="section double-padded">
<p>Converts the values of RGB components to a color code.</p>
<p>Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (<code>&lt;&lt;</code>) and <code>toString(16)</code>, then <code>String.padStart(6,'0')</code> to get a 6-digit hexadecimal value.</p>
<pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">RGBToHex</span> <span class="token operator">=</span> <span class="token punctuation">(</span>r<span class="token punctuation">,</span> g<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>r <span class="token operator">&lt;&lt;</span> <span class="token number">16</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token punctuation">(</span>g <span class="token operator">&lt;&lt;</span> <span class="token number">8</span><span class="token punctuation">)</span> <span class="token operator">+</span> b<span class="token punctuation">).</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token number">16</span><span class="token punctuation">).</span><span class="token function">padStart</span><span class="token punctuation">(</span><span class="token number">6</span><span class="token punctuation">,</span> <span class="token string">'0'</span><span class="token punctuation">);</span>
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">RGBToHex</span><span class="token punctuation">(</span><span class="token number">255</span><span class="token punctuation">,</span> <span class="token number">165</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">);</span> <span class="token comment">// 'ffa501'</span>
<button class="next" aria-label="next"><svg version="1.1" width="8" height="16" viewBox="0 0 8 16" class="octicon octicon-chevron-right" aria-hidden="true"><path fill-rule="evenodd" d="M7.5 8l-5 5L1 11.5 4.75 8 1 4.5 2.5 3l5 5z"/></svg></button>
<button class="previous" aria-label="previous"><svg version="1.1" width="8" height="16" viewBox="0 0 8 16" class="octicon octicon-chevron-left" aria-hidden="true"><path fill-rule="evenodd" d="M6 3l1.5 1.5L3.75 8l3.75 3.5L6 13 1 8l5-5z"/></svg></button>
<div class="card fluid pick selected"><h3 id="bytesize.md" class="section double-padded">byteSize</h3><div class="section double-padded">
<p>Returns the length of a string in bytes.</p>
<p>Convert a given string to a <a href="https://developer.mozilla.org/en-US/docs/Web/API/Blob"><code>Blob</code> Object</a> and find its <code>size</code>.</p>
<pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">byteSize</span> <span class="token operator">=</span> str <span class="token operator">=></span> <span class="token keyword">new</span> <span class="token class-name">Blob</span><span class="token punctuation">([</span>str<span class="token punctuation">]).</span>size<span class="token punctuation">;</span>
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">byteSize</span><span class="token punctuation">(</span><span class="token string">'😀'</span><span class="token punctuation">);</span> <span class="token comment">// 4</span>
<span class="token function">byteSize</span><span class="token punctuation">(</span><span class="token string">'Hello World'</span><span class="token punctuation">);</span> <span class="token comment">// 11</span>
</pre>
<button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid pick"><h3 id="throttle.md" class="section double-padded">throttle</h3><div class="section double-padded">
<p>Creates a throttled function that only invokes the provided function at most once per every <code>wait</code> milliseconds</p>
<p>Use <code>setTimeout()</code> and <code>clearTimeout()</code> to throttle the given method, <code>fn</code>.
Use <code>Function.apply()</code> to apply the <code>this</code> context to the function and provide the necessary <code>arguments</code>.
Use <code>Date.now()</code> to keep track of the last time the throttled function was invoked.
Omit the second argument, <code>wait</code>, to set the timeout at a default of 0 ms.</p>
<pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">throttle</span> <span class="token operator">=</span> <span class="token punctuation">(</span>fn<span class="token punctuation">,</span> wait<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
<span class="token keyword">let</span> inThrottle<span class="token punctuation">,</span> lastFn<span class="token punctuation">,</span> lastTime<span class="token punctuation">;</span>
<span class="token keyword">return function</span><span class="token punctuation">() {</span>
<span class="token keyword">const</span> context <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">,</span>
args <span class="token operator">=</span> arguments<span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span>inThrottle<span class="token punctuation">) {</span>
fn<span class="token punctuation">.</span><span class="token function">apply</span><span class="token punctuation">(</span>context<span class="token punctuation">,</span> args<span class="token punctuation">);</span>
lastTime <span class="token operator">=</span> Date<span class="token punctuation">.</span><span class="token function">now</span><span class="token punctuation">();</span>
inThrottle <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;
}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
<span class="token function">clearTimeout</span><span class="token punctuation">(</span>lastFn<span class="token punctuation">);</span>
lastFn <span class="token operator">=</span> <span class="token function">setTimeout</span><span class="token punctuation">(</span><span class="token keyword">function</span><span class="token punctuation">() {</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>Date<span class="token punctuation">.</span><span class="token function">now</span><span class="token punctuation">()</span> <span class="token operator">-</span> lastTime <span class="token operator">>=</span> wait<span class="token punctuation">) {</span>
fn<span class="token punctuation">.</span><span class="token function">apply</span><span class="token punctuation">(</span>context<span class="token punctuation">,</span> args<span class="token punctuation">);</span>
lastTime <span class="token operator">=</span> Date<span class="token punctuation">.</span><span class="token function">now</span><span class="token punctuation">();
}
},</span> wait <span class="token operator">-</span> <span class="token punctuation">(</span>Date<span class="token punctuation">.</span><span class="token function">now</span><span class="token punctuation">()</span> <span class="token operator">-</span> lastTime<span class="token punctuation">));
}
};
};</span>
</pre><label class="collapse">Show examples</label><pre class="language-js">window<span class="token punctuation">.</span><span class="token function">addEventListener</span><span class="token punctuation">(</span>
<span class="token string">'resize'</span><span class="token punctuation">,</span>
<span class="token function">throttle</span><span class="token punctuation">(</span><span class="token keyword">function</span><span class="token punctuation">(</span>evt<span class="token punctuation">) {</span>
console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>window<span class="token punctuation">.</span>innerWidth<span class="token punctuation">);</span>
console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>window<span class="token punctuation">.</span>innerHeight<span class="token punctuation">);
},</span> <span class="token number">250</span><span class="token punctuation">)
);</span> <span class="token comment">// Will log the window dimensions at most every 250ms</span>
<button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid pick"><h3 id="hashnode.md" class="section double-padded">hashNode</h3><div class="section double-padded">
<p>Creates a hash for a value using the <a href="https://en.wikipedia.org/wiki/SHA-2">SHA-256</a> algorithm. Returns a promise.</p>
<p>Use <code>crypto</code> API to create a hash for the given value.</p>
<pre class="language-js"><span class="token keyword">const</span> crypto <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'crypto'</span><span class="token punctuation">);</span>
<span class="token keyword">const</span> <span class="token function-variable function">hashNode</span> <span class="token operator">=</span> val <span class="token operator">=></span>
<span class="token keyword">new</span> <span class="token class-name">Promise</span><span class="token punctuation">(</span>resolve <span class="token operator">=></span>
<span class="token function">setTimeout</span><span class="token punctuation">(
()</span> <span class="token operator">=></span>
<span class="token function">resolve</span><span class="token punctuation">(</span>
crypto
<span class="token punctuation">.</span><span class="token function">createHash</span><span class="token punctuation">(</span><span class="token string">'sha256'</span><span class="token punctuation">)
.</span><span class="token function">update</span><span class="token punctuation">(</span>val<span class="token punctuation">)
.</span><span class="token function">digest</span><span class="token punctuation">(</span><span class="token string">'hex'</span><span class="token punctuation">)
),</span>
<span class="token number">0</span>
<span class="token punctuation">)
);</span>
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">hashNode</span><span class="token punctuation">(</span>JSON<span class="token punctuation">.</span><span class="token function">stringify</span><span class="token punctuation">({</span> a<span class="token punctuation">:</span> <span class="token string">'a'</span><span class="token punctuation">,</span> b<span class="token punctuation">: [</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">],</span> foo<span class="token punctuation">: {</span> c<span class="token punctuation">:</span> <span class="token string">'bar'</span> <span class="token punctuation">} })).</span><span class="token function">then</span><span class="token punctuation">(</span>console<span class="token punctuation">.</span>log<span class="token punctuation">);</span> <span class="token comment">// '04aa106279f5977f59f9067fa9712afc4aedc6f5862a8defc34552d8c7206393'</span>
</pre>
<button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid pick"><h3 id="tocurrency.md" class="section double-padded">toCurrency</h3><div class="section double-padded">
<p>Take a number and return specified currency formatting.</p>
<p>Use <code>Intl.NumberFormat</code> to enable country / currency sensitive formatting.</p>
<pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">toCurrency</span> <span class="token operator">=</span> <span class="token punctuation">(</span>n<span class="token punctuation">,</span> curr<span class="token punctuation">,</span> LanguageFormat <span class="token operator">=</span> undefined<span class="token punctuation">)</span> <span class="token operator">=></span>
Intl<span class="token punctuation">.</span><span class="token function">NumberFormat</span><span class="token punctuation">(</span>LanguageFormat<span class="token punctuation">, {</span> style<span class="token punctuation">:</span> <span class="token string">'currency'</span><span class="token punctuation">,</span> currency<span class="token punctuation">:</span> curr <span class="token punctuation">}).</span><span class="token function">format</span><span class="token punctuation">(</span>n<span class="token punctuation">);</span>
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">toCurrency</span><span class="token punctuation">(</span><span class="token number">123456.789</span><span class="token punctuation">,</span> <span class="token string">'EUR'</span><span class="token punctuation">);</span> <span class="token comment">// €123,456.79 | currency: Euro | currencyLangFormat: Local</span>
<span class="token function">toCurrency</span><span class="token punctuation">(</span><span class="token number">123456.789</span><span class="token punctuation">,</span> <span class="token string">'USD'</span><span class="token punctuation">,</span> <span class="token string">'en-us'</span><span class="token punctuation">);</span> <span class="token comment">// $123,456.79 | currency: US Dollar | currencyLangFormat: English (United States)</span>
<span class="token function">toCurrency</span><span class="token punctuation">(</span><span class="token number">123456.789</span><span class="token punctuation">,</span> <span class="token string">'USD'</span><span class="token punctuation">,</span> <span class="token string">'fa'</span><span class="token punctuation">);</span> <span class="token comment">// ۱۲۳٬۴۵۶٫۷۹ ؜$ | currency: US Dollar | currencyLangFormat: Farsi</span>
<span class="token function">toCurrency</span><span class="token punctuation">(</span><span class="token number">322342436423.2435</span><span class="token punctuation">,</span> <span class="token string">'JPY'</span><span class="token punctuation">);</span> <span class="token comment">// ¥322,342,436,423 | currency: Japanese Yen | currencyLangFormat: Local</span>
<span class="token function">toCurrency</span><span class="token punctuation">(</span><span class="token number">322342436423.2435</span><span class="token punctuation">,</span> <span class="token string">'JPY'</span><span class="token punctuation">,</span> <span class="token string">'fi'</span><span class="token punctuation">);</span> <span class="token comment">// 322 342 436 423 ¥ | currency: Japanese Yen | currencyLangFormat: Finnish</span>
<button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid pick"><h3 id="take.md" class="section double-padded">take</h3><div class="section double-padded">
<p>Returns an array with n elements removed from the beginning.</p>
<p>Use <code>Array.slice()</code> to create a slice of the array with <code>n</code> elements taken from the beginning.</p>
<pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">take</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> n <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">=></span> arr<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> n<span class="token punctuation">);</span>
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">take</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">],</span> <span class="token number">5</span><span class="token punctuation">);</span> <span class="token comment">// [1, 2, 3]</span>
<span class="token function">take</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">],</span> <span class="token number">0</span><span class="token punctuation">);</span> <span class="token comment">// []</span>
</pre>
<button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div>
<br/>
@ -159,36 +142,36 @@ Omit the second argument, <code>wait</code>, to set the timeout at a default of
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<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Utility - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><script>const search = (node) => {
<!DOCTYPE html><html lang="en"><head><script async src="https://www.googletagmanager.com/gtag/js?id=UA-117141635-1"></script><script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-117141635-1")</script><link rel="stylesheet" href="./mini.css"><title>Utility - 30 seconds of code</title><meta charset="utf-8"><meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."><meta name="keywords" content="javascript, snippets, code, programming"><meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)"><meta name="viewport" content="width=device-width,initial-scale=1"><meta name="theme-color" content="#111"><meta property="og:title" content="30 seconds of code"><meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less."/><meta property="og:type" content="website"/><meta property="og:image" content="favicon.png"><link rel="icon" type="image/png" href="favicon.png"><link rel="manifest" href="manifest.json"><script>const search = (node) => {
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let data = [x.textContent.toLowerCase(), ...x.getAttribute('tags').split(',')].map(v => !!(v.indexOf(node.value.toLowerCase()) + 1));

5
static-parts/beginner-page-start.html
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@ -14,12 +14,13 @@
<meta charset="utf-8">
<meta name="description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less.">
<meta name="keywords" content="javascript, snippets, code, programming">
<meta name="author" content="Stefan Feješ (ns.fejes.stefan@gmail.com)">
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<meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less." />
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<script>
function scrollToTop(){
const c = document.querySelector('html').scrollTop;

23
static-parts/index.html
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@ -16,10 +16,11 @@
<meta name="keywords" content="javascript, snippets, code, programming">
<meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)">
<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta property="og:title" content="30 seconds of code">
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<link rel="icon" type="image/png" href="favicon.png">
<link rel="icon" type="image/png" href="favicon.png"><link rel="manifest" href="manifest.json">
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<body>
<a href="https://github.com/Chalarangelo/30-seconds-of-code" class="github-corner" aria-label="View source on Github"><svg width="56" height="56" viewBox="0 0 250 250" style="fill:#151513; color:#fff; position: fixed; top: 0; border: 0; right: 0; z-index: 1000" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style>
@ -73,8 +74,8 @@
<h2 class="index-section">Today's picks</h2>
<p>Our sophisticated robot helpers pick new snippets from our collection daily, so that you can discover new snippets to enhance your projects:</p>
<div id="pick-slider">
<button class="next"><svg version="1.1" width="8" height="16" viewBox="0 0 8 16" class="octicon octicon-chevron-right" aria-hidden="true"><path fill-rule="evenodd" d="M7.5 8l-5 5L1 11.5 4.75 8 1 4.5 2.5 3l5 5z"/></svg></button>
<button class="previous"><svg version="1.1" width="8" height="16" viewBox="0 0 8 16" class="octicon octicon-chevron-left" aria-hidden="true"><path fill-rule="evenodd" d="M6 3l1.5 1.5L3.75 8l3.75 3.5L6 13 1 8l5-5z"/></svg></button>
<button class="next" aria-label="next"><svg version="1.1" width="8" height="16" viewBox="0 0 8 16" class="octicon octicon-chevron-right" aria-hidden="true"><path fill-rule="evenodd" d="M7.5 8l-5 5L1 11.5 4.75 8 1 4.5 2.5 3l5 5z"/></svg></button>
<button class="previous" aria-label="previous"><svg version="1.1" width="8" height="16" viewBox="0 0 8 16" class="octicon octicon-chevron-left" aria-hidden="true"><path fill-rule="evenodd" d="M6 3l1.5 1.5L3.75 8l3.75 3.5L6 13 1 8l5-5z"/></svg></button>
$daily-picks
<br/>
</div>
@ -108,36 +109,36 @@
<h2 class="index-section">Top contributors</h2>
<div class="row">
<div class="col-sm-6 col-md-3 col-lg no-padding"><div class="card fluid contributor">
<img class="section media" src="https://github.com/Chalarangelo.png"/>
<img class="section media" src="https://github.com/Chalarangelo.png"/ alt="chalarangelo">
<a href="https://github.com/Chalarangelo" class="section button">Angelos Chalaris</a>
</div>
</div>
<div class="col-sm-6 col-md-3 col-lg no-padding"><div class="card fluid contributor">
<img class="section media" src="https://github.com/fejes713.png"/>
<img class="section media" src="https://github.com/fejes713.png"/ alt="fejes713">
<a href="https://github.com/fejes713" class="section button">Stefan Feješ</a>
</div></div>
<div class="col-sm-6 col-md-3 col-lg no-padding"><div class="card fluid contributor">
<img class="section media" src="https://github.com/flxwu.png"/>
<img class="section media" src="https://github.com/flxwu.png"/ alt="flxwu">
<a href="https://github.com/flxwu" class="section button">Felix Wu</a>
</div></div>
<div class="col-sm-6 col-md-3 col-lg no-padding"><div class="card fluid contributor">
<img class="section media" src="https://github.com/atomiks.png"/>
<img class="section media" src="https://github.com/atomiks.png"/ alt="atomiks">
<a href="https://github.com/atomiks" class="section button">atomiks</a>
</div></div>
<div class="col-sm-6 col-md-3 col-lg no-padding"><div class="card fluid contributor">
<img class="section media" src="https://github.com/kingdavidmartins.png"/>
<img class="section media" src="https://github.com/kingdavidmartins.png"/ alt="kingdavidmartins">
<a href="https://github.com/kingdavidmartins" class="section button">King David Martins</a>
</div></div>
<div class="col-sm-6 col-md-3 col-lg no-padding"><div class="card fluid contributor">
<img class="section media" src="https://github.com/kriadmin.png"/>
<img class="section media" src="https://github.com/kriadmin.png"/ alt="kriadmin">
<a href="https://github.com/kriadmin" class="section button">Rohit Tanwar</a>
</div></div>
<div class="col-sm-6 col-md-3 col-lg no-padding"><div class="card fluid contributor">
<img class="section media" src="https://github.com/iamsoorena.png"/>
<img class="section media" src="https://github.com/iamsoorena.png"/ alt="iamsoorena">
<a href="https://github.com/iamsoorena" class="section button">Soorena Soleimani</a>
</div></div>
<div class="col-sm-6 col-md-3 col-lg no-padding"><div class="card fluid contributor">
<img class="section media" src="https://github.com/skatcat31.png"/>
<img class="section media" src="https://github.com/skatcat31.png"/ alt="skatcat31">
<a href="https://github.com/skatcat31" class="section button">Robert Mennell</a>
</div></div>
</div>

3
static-parts/page-start.html
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<meta name="keywords" content="javascript, snippets, code, programming">
<meta name="author" content="Angelos Chalaris (chalarangelo@gmail.com)">
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<meta name="theme-color" content="#111">
<meta property="og:title" content="30 seconds of code">
<meta property="og:description" content="Curated collection of useful Javascript snippets that you can understand in 30 seconds or less." />
<meta property="og:type" content="website" /><meta property="og:image" content="favicon.png">
<link rel="icon" type="image/png" href="favicon.png">
<link rel="icon" type="image/png" href="favicon.png"><link rel="manifest" href="manifest.json">
<script>
const search = (node) => {
let matchingTags = [];