remove unnecessary console.logs
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Stefan Feješ
@ -46,7 +46,7 @@
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<p><span id="star-count">19461</span><br/>stars</p>
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@ -76,38 +76,38 @@
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<div id="pick-slider">
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<div class="card fluid pick selected"><h3 id="bytesize.md" class="section double-padded">byteSize</h3><div class="section double-padded">
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<p>Returns the length of a string in bytes.</p>
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<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>
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<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>
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</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>
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<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>
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<div class="card fluid pick selected"><h3 id="reducewhich.md" class="section double-padded">reduceWhich</h3><div class="section double-padded">
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<p>Returns the minimum/maximum value of an array, after applying the provided function to set comparing rule.</p>
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<p>Use <code>Array.reduce()</code> in combination with the <code>comparator</code> function to get the appropriate element in the array.
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You can omit the second parameter, <code>comparator</code>, to use the default one that returns the minimum element in the array.</p>
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<pre class="language-js"><span class="token keyword">const</span> reduceWhich <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> <span class="token function-variable function">comparator</span> <span class="token operator">=</span> <span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> a <span class="token operator">-</span> b<span class="token punctuation">)</span> <span class="token operator">=></span>
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arr<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token function">comparator</span><span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">>=</span> <span class="token number">0</span> <span class="token operator">?</span> b <span class="token punctuation">:</span> a<span class="token punctuation">));</span>
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</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">reduceWhich</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]);</span> <span class="token comment">// 1</span>
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<span class="token function">reduceWhich</span><span class="token punctuation">([</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">], (</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> b <span class="token operator">-</span> a<span class="token punctuation">);</span> <span class="token comment">// 3</span>
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<span class="token function">reduceWhich</span><span class="token punctuation">(
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[{</span> name<span class="token punctuation">:</span> <span class="token string">'Tom'</span><span class="token punctuation">,</span> age<span class="token punctuation">:</span> <span class="token number">12</span> <span class="token punctuation">}, {</span> name<span class="token punctuation">:</span> <span class="token string">'Jack'</span><span class="token punctuation">,</span> age<span class="token punctuation">:</span> <span class="token number">18</span> <span class="token punctuation">}, {</span> name<span class="token punctuation">:</span> <span class="token string">'Lucy'</span><span class="token punctuation">,</span> age<span class="token punctuation">:</span> <span class="token number">9</span> <span class="token punctuation">}],
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(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> a<span class="token punctuation">.</span>age <span class="token operator">-</span> b<span class="token punctuation">.</span>age
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<span class="token punctuation">);</span> <span class="token comment">// {name: "Lucy", age: 9}</span>
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</pre>
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<button class="primary clipboard-copy">📋 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">
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<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>
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<p>Use <code>crypto</code> API to create a hash for the given value.</p>
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<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>
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<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>
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<span class="token keyword">new</span> <span class="token class-name">Promise</span><span class="token punctuation">(</span>resolve <span class="token operator">=></span>
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<span class="token function">setTimeout</span><span class="token punctuation">(
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()</span> <span class="token operator">=></span>
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<span class="token function">resolve</span><span class="token punctuation">(</span>
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crypto
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<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">)
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.</span><span class="token function">update</span><span class="token punctuation">(</span>val<span class="token punctuation">)
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.</span><span class="token function">digest</span><span class="token punctuation">(</span><span class="token string">'hex'</span><span class="token punctuation">)
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),</span>
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<span class="token number">0</span>
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<span class="token punctuation">)
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<button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid pick"><h3 id="uniqueelements.md" class="section double-padded">uniqueElements</h3><div class="section double-padded">
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<p>Returns all unique values of an array.</p>
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<p>Use ES6 <code>Set</code> and the <code>...rest</code> operator to discard all duplicated values.</p>
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<pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">uniqueElements</span> <span class="token operator">=</span> arr <span class="token operator">=></span> <span class="token punctuation">[</span><span class="token operator">...</span><span class="token keyword">new</span> <span class="token class-name">Set</span><span class="token punctuation">(</span>arr<span class="token punctuation">)];</span>
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</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">uniqueElements</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">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> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]);</span> <span class="token comment">// [1,2,3,4,5]</span>
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</pre>
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<button class="primary clipboard-copy">📋 Copy to clipboard</button></div></div><div class="card fluid pick"><h3 id="unzip.md" class="section double-padded">unzip</h3><div class="section double-padded">
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<p>Creates an array of arrays, ungrouping the elements in an array produced by <a href="#zip">zip</a>.</p>
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<p>Use <code>Math.max.apply()</code> to get the longest subarray in the array, <code>Array.map()</code> to make each element an array.
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Use <code>Array.reduce()</code> and <code>Array.forEach()</code> to map grouped values to individual arrays.</p>
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<pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">unzip</span> <span class="token operator">=</span> arr <span class="token operator">=></span>
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arr<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">(
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(</span>acc<span class="token punctuation">,</span> val<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span>val<span class="token punctuation">.</span><span class="token function">forEach</span><span class="token punctuation">((</span>v<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> acc<span class="token punctuation">[</span>i<span class="token punctuation">].</span><span class="token function">push</span><span class="token punctuation">(</span>v<span class="token punctuation">)),</span> acc<span class="token punctuation">),</span>
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Array<span class="token punctuation">.</span><span class="token keyword">from</span><span class="token punctuation">({</span>
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length<span class="token punctuation">:</span> Math<span class="token punctuation">.</span><span class="token function">max</span><span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span>x <span class="token operator">=></span> x<span class="token punctuation">.</span>length<span class="token punctuation">))
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}).</span><span class="token function">map</span><span class="token punctuation">(</span>x <span class="token operator">=></span> <span class="token punctuation">[])
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);</span>
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</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>
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</pre>
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<button class="primary clipboard-copy">📋 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">
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<p>Returns an array with n elements removed from the beginning.</p>
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<p>Use <code>Array.slice()</code> to create a slice of the array with <code>n</code> elements taken from the beginning.</p>
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<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>
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</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>
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<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>
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</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">unzip</span><span class="token punctuation">([[</span><span class="token string">'a'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">], [</span><span class="token string">'b'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token boolean">false</span><span class="token punctuation">]]);</span> <span class="token comment">//[['a', 'b'], [1, 2], [true, false]]</span>
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<span class="token function">unzip</span><span class="token punctuation">([[</span><span class="token string">'a'</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">], [</span><span class="token string">'b'</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]]);</span> <span class="token comment">//[['a', 'b'], [1, 2], [true]]</span>
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</pre>
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