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30secondsofcode
@ -199,6 +199,9 @@
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<span class="token keyword">return</span> <span class="token template-string"><span class="token string">`</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>dt<span class="token punctuation">.</span><span class="token function">getDate</span><span class="token punctuation">()</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">/</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>dt<span class="token punctuation">.</span><span class="token function">getMonth</span><span class="token punctuation">()</span> <span class="token operator">+</span> <span class="token number">1</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">/</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>dt<span class="token punctuation">.</span><span class="token function">getFullYear</span><span class="token punctuation">()</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">`</span></span><span class="token punctuation">;
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};</span>
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</pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">JSONToDate</span><span class="token punctuation">(</span><span class="token regex">/Date(1489525200000)/</span><span class="token punctuation">);</span> <span class="token comment">// "14/3/2017"</span>
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</pre></div><div class="card code-card"><div class="section card-content"><h4 id="kmphtomph.md">kmphToMph</h4><p>Convert kilometers/hour to miles/hour.</p><p>Multiply the constant of proportionality with the argument.</p></div><div class="copy-button-container"><button class="copy-button" aria-label="Copy to clipboard"></button></div><pre class="section card-code language-js"><span class="token keyword">const</span> <span class="token function-variable function">kmphToMph</span> <span class="token operator">=</span> <span class="token punctuation">(</span>kmph<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token number">0.621371192</span> <span class="token operator">*</span> kmph<span class="token punctuation">;</span>
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</pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">kmphToMph</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">);</span> <span class="token comment">// 16.09344000614692</span>
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<span class="token function">kmphToMph</span><span class="token punctuation">(</span><span class="token number">345.4</span><span class="token punctuation">);</span> <span class="token comment">// 138.24264965280207</span>
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</pre></div><div class="card code-card"><div class="section card-content"><h4 id="levenshteindistance.md">levenshteinDistance</h4><p>Calculates the <a href="https://en.wikipedia.org/wiki/Levenshtein_distance">Levenshtein distance</a> between two strings.</p><p>Calculates the number of changes (substitutions, deletions or additions) required to convert <code>string1</code> to <code>string2</code>. Can also be used to compare two strings as shown in the second example.</p></div><div class="copy-button-container"><button class="copy-button" aria-label="Copy to clipboard"></button></div><pre class="section card-code language-js"><span class="token keyword">const</span> <span class="token function-variable function">levenshteinDistance</span> <span class="token operator">=</span> <span class="token punctuation">(</span>string1<span class="token punctuation">,</span> string2<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span>string1<span class="token punctuation">.</span>length <span class="token operator">===</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token keyword">return</span> string2<span class="token punctuation">.</span>length<span class="token punctuation">;</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span>string2<span class="token punctuation">.</span>length <span class="token operator">===</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token keyword">return</span> string1<span class="token punctuation">.</span>length<span class="token punctuation">;</span>
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@ -226,6 +229,9 @@
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</pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">levenshteinDistance</span><span class="token punctuation">(</span><span class="token string">'30-seconds-of-code'</span><span class="token punctuation">,</span><span class="token string">'30-seconds-of-python-code'</span><span class="token punctuation">);</span> <span class="token comment">// 7</span>
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<span class="token keyword">const</span> <span class="token function-variable function">compareStrings</span> <span class="token operator">=</span> <span class="token punctuation">(</span>string1<span class="token punctuation">,</span>string2<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token number">100</span> <span class="token operator">-</span> <span class="token function">levenshteinDistance</span><span class="token punctuation">(</span>string1<span class="token punctuation">,</span>string2<span class="token punctuation">)</span> <span class="token operator">/</span> Math<span class="token punctuation">.</span><span class="token function">max</span><span class="token punctuation">(</span>string1<span class="token punctuation">.</span>length<span class="token punctuation">,</span>string2<span class="token punctuation">.</span>length<span class="token punctuation">));</span>
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<span class="token function">compareStrings</span><span class="token punctuation">(</span><span class="token string">'30-seconds-of-code'</span><span class="token punctuation">,</span> <span class="token string">'30-seconds-of-python-code'</span><span class="token punctuation">);</span> <span class="token comment">// 99.72 (%)</span>
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</pre></div><div class="card code-card"><div class="section card-content"><h4 id="mphtokmph.md">mphToKmph</h4><p>Convert miles/hour to kilometers/hour.</p><p>Multiply the constant of proportionality with the argument.</p></div><div class="copy-button-container"><button class="copy-button" aria-label="Copy to clipboard"></button></div><pre class="section card-code language-js"><span class="token keyword">const</span> <span class="token function-variable function">mphToKmph</span> <span class="token operator">=</span> <span class="token punctuation">(</span>mph<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token number">1.6093440006146922</span> <span class="token operator">*</span> mph<span class="token punctuation">;</span>
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</pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">mphToKmph</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">);</span> <span class="token comment">// 16.09344000614692</span>
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<span class="token function">mphToKmph</span><span class="token punctuation">(</span><span class="token number">85.9</span><span class="token punctuation">);</span> <span class="token comment">// 138.24264965280207</span>
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</pre></div><div class="card code-card"><div class="section card-content"><h4 id="pipelog.md">pipeLog</h4><p>Logs a value and returns it.</p><p>Use <code>console.log</code> to log the supplied value, combined with the <code>||</code> operator to return it.</p></div><div class="copy-button-container"><button class="copy-button" aria-label="Copy to clipboard"></button></div><pre class="section card-code language-js"><span class="token keyword">const</span> <span class="token function-variable function">pipeLog</span> <span class="token operator">=</span> data <span class="token operator">=></span> console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>data<span class="token punctuation">)</span> <span class="token operator">||</span> data<span class="token punctuation">;</span>
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</pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">pipeLog</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">);</span> <span class="token comment">// logs `1` and returns `1`</span>
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</pre></div><div class="card code-card"><div class="section card-content"><h4 id="quicksort.md">quickSort</h4><p>QuickSort an Array (ascending sort by default).</p><p>Use recursion. Use <code>Array.prototype.filter</code> and spread operator (<code>...</code>) to create an array that all elements with values less than the pivot come before the pivot, and all elements with values greater than the pivot come after it. If the parameter <code>desc</code> is truthy, return array sorts in descending order.</p></div><div class="copy-button-container"><button class="copy-button" aria-label="Copy to clipboard"></button></div><pre class="section card-code language-js"><span class="token keyword">const</span> <span class="token function-variable function">quickSort</span> <span class="token operator">=</span> <span class="token punctuation">([</span>n<span class="token punctuation">,</span> <span class="token operator">...</span>nums<span class="token punctuation">],</span> desc<span class="token punctuation">)</span> <span class="token operator">=></span>
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