Travis build: 462
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30secondsofcode
@ -149,7 +149,7 @@
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<span class="token function">howManyTimes</span><span class="token punctuation">(</span><span class="token number">100</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">);</span> <span class="token comment">// Infinity</span>
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</pre></div><div class="card code-card"><div class="section card-content"><h4 id="httpdelete.md">httpDelete</h4><p>Makes a <code>DELETE</code> request to the passed URL.</p><p>Use <code>XMLHttpRequest</code> web api to make a <code>delete</code> request to the given <code>url</code>. Handle the <code>onload</code> event, by running the provided <code>callback</code> function. Handle the <code>onerror</code> event, by running the provided <code>err</code> function. Omit the third argument, <code>err</code> to log the request to the console's error stream by default.</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">httpDelete</span> <span class="token operator">=</span> <span class="token punctuation">(</span>url<span class="token punctuation">,</span> callback<span class="token punctuation">,</span> err <span class="token operator">=</span> console<span class="token punctuation">.</span>error<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
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<span class="token keyword">const</span> request <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">XMLHttpRequest</span><span class="token punctuation">();</span>
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request<span class="token punctuation">.</span><span class="token function">open</span><span class="token punctuation">(</span><span class="token string">"DELETE"</span><span class="token punctuation">,</span> url<span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">);</span>
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request<span class="token punctuation">.</span><span class="token function">open</span><span class="token punctuation">(</span><span class="token string">'DELETE'</span><span class="token punctuation">,</span> url<span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">);</span>
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request<span class="token punctuation">.</span><span class="token function-variable function">onload</span> <span class="token operator">=</span> <span class="token punctuation">()</span> <span class="token operator">=></span> <span class="token function">callback</span><span class="token punctuation">(</span>request<span class="token punctuation">);</span>
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request<span class="token punctuation">.</span><span class="token function-variable function">onerror</span> <span class="token operator">=</span> <span class="token punctuation">()</span> <span class="token operator">=></span> <span class="token function">err</span><span class="token punctuation">(</span>request<span class="token punctuation">);</span>
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request<span class="token punctuation">.</span><span class="token function">send</span><span class="token punctuation">();
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@ -158,12 +158,12 @@
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console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>request<span class="token punctuation">.</span>responseText<span class="token punctuation">);
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});</span> <span class="token comment">// 'Deletes a user from the database'</span>
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</pre></div><div class="card code-card"><div class="section card-content"><h4 id="httpput.md">httpPut</h4><p>Makes a <code>PUT</code> request to the passed URL.</p><p>Use <code>XMLHttpRequest</code> web api to make a <code>put</code> request to the given <code>url</code>. Set the value of an <code>HTTP</code> request header with <code>setRequestHeader</code> method. Handle the <code>onload</code> event, by running the provided <code>callback</code> function. Handle the <code>onerror</code> event, by running the provided <code>err</code> function. Omit the last argument, <code>err</code> to log the request to the console's error stream by default.</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">httpPut</span> <span class="token operator">=</span> <span class="token punctuation">(</span>url<span class="token punctuation">,</span> data<span class="token punctuation">,</span> callback<span class="token punctuation">,</span> err <span class="token operator">=</span> console<span class="token punctuation">.</span>error<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
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<span class="token keyword">const</span> request <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">XMLHttpRequest</span><span class="token punctuation">();</span>
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request<span class="token punctuation">.</span><span class="token function">open</span><span class="token punctuation">(</span><span class="token string">"PUT"</span><span class="token punctuation">,</span> url<span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">);</span>
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request<span class="token punctuation">.</span><span class="token function">setRequestHeader</span><span class="token punctuation">(</span><span class="token string">'Content-type'</span><span class="token punctuation">,</span><span class="token string">'application/json; charset=utf-8'</span><span class="token punctuation">);</span>
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request<span class="token punctuation">.</span><span class="token function-variable function">onload</span> <span class="token operator">=</span> <span class="token punctuation">()</span> <span class="token operator">=></span> <span class="token function">callback</span><span class="token punctuation">(</span>request<span class="token punctuation">);</span>
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request<span class="token punctuation">.</span><span class="token function-variable function">onerror</span> <span class="token operator">=</span> <span class="token punctuation">()</span> <span class="token operator">=></span> <span class="token function">err</span><span class="token punctuation">(</span>request<span class="token punctuation">);</span>
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request<span class="token punctuation">.</span><span class="token function">send</span><span class="token punctuation">(</span>data<span class="token punctuation">);
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<span class="token keyword">const</span> request <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">XMLHttpRequest</span><span class="token punctuation">();</span>
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request<span class="token punctuation">.</span><span class="token function">open</span><span class="token punctuation">(</span><span class="token string">"PUT"</span><span class="token punctuation">,</span> url<span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">);</span>
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request<span class="token punctuation">.</span><span class="token function">setRequestHeader</span><span class="token punctuation">(</span><span class="token string">'Content-type'</span><span class="token punctuation">,</span><span class="token string">'application/json; charset=utf-8'</span><span class="token punctuation">);</span>
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request<span class="token punctuation">.</span><span class="token function-variable function">onload</span> <span class="token operator">=</span> <span class="token punctuation">()</span> <span class="token operator">=></span> <span class="token function">callback</span><span class="token punctuation">(</span>request<span class="token punctuation">);</span>
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request<span class="token punctuation">.</span><span class="token function-variable function">onerror</span> <span class="token operator">=</span> <span class="token punctuation">()</span> <span class="token operator">=></span> <span class="token function">err</span><span class="token punctuation">(</span>request<span class="token punctuation">);</span>
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request<span class="token punctuation">.</span><span class="token function">send</span><span class="token punctuation">(</span>data<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 keyword">const</span> password <span class="token operator">=</span> <span class="token string">"fooBaz"</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> data <span class="token operator">=</span> <span class="token constant">JSON</span><span class="token punctuation">.</span><span class="token function">stringify</span><span class="token punctuation">(</span>password<span class="token punctuation">);</span>
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@ -177,9 +177,15 @@
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</pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">isArmstrongNumber</span><span class="token punctuation">(</span><span class="token number">1634</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
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<span class="token function">isArmstrongNumber</span><span class="token punctuation">(</span><span class="token number">56</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
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</pre></div><div class="card code-card"><div class="section card-content"><h4 id="issimilar.md">isSimilar</h4><p>Determines if the <code>pattern</code> matches with <code>str</code>.</p><p>Use <code>String.toLowerCase()</code> to convert both strings to lowercase, then loop through <code>str</code> and determine if it contains all characters of <code>pattern</code> and in the correct order. Adapted from <a href="https://github.com/forrestthewoods/lib_fts/blob/80f3f8c52db53428247e741b9efe2cde9667050c/code/fts_fuzzy_match.js#L18">here</a>.</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">isSimilar</span> <span class="token operator">=</span> <span class="token punctuation">(</span>pattern<span class="token punctuation">,</span> str<span class="token punctuation">)</span> <span class="token operator">=></span>
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<span class="token punctuation">[</span><span class="token operator">...</span>str<span class="token punctuation">].</span><span class="token function">reduce</span><span class="token punctuation">(
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(</span>matchIndex<span class="token punctuation">,</span> char<span class="token punctuation">)</span> <span class="token operator">=></span> char<span class="token punctuation">.</span><span class="token function">toLowerCase</span><span class="token punctuation">()</span> <span class="token operator">===</span> <span class="token punctuation">(</span>pattern<span class="token punctuation">[</span>matchIndex<span class="token punctuation">]</span> <span class="token operator">||</span> <span class="token string">''</span><span class="token punctuation">).</span><span class="token function">toLowerCase</span><span class="token punctuation">()</span> <span class="token operator">?</span> matchIndex <span class="token operator">+</span> <span class="token number">1</span> <span class="token punctuation">:</span> matchIndex<span class="token punctuation">,</span> <span class="token number">0</span>
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<span class="token punctuation">)</span> <span class="token operator">===</span> pattern<span class="token punctuation">.</span>length <span class="token operator">?</span> <span class="token boolean">true</span> <span class="token punctuation">:</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
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<span class="token punctuation">[</span><span class="token operator">...</span>str<span class="token punctuation">].</span><span class="token function">reduce</span><span class="token punctuation">(
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(</span>matchIndex<span class="token punctuation">,</span> char<span class="token punctuation">)</span> <span class="token operator">=></span>
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char<span class="token punctuation">.</span><span class="token function">toLowerCase</span><span class="token punctuation">()</span> <span class="token operator">===</span> <span class="token punctuation">(</span>pattern<span class="token punctuation">[</span>matchIndex<span class="token punctuation">]</span> <span class="token operator">||</span> <span class="token string">''</span><span class="token punctuation">).</span><span class="token function">toLowerCase</span><span class="token punctuation">()</span>
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<span class="token operator">?</span> matchIndex <span class="token operator">+</span> <span class="token number">1</span>
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<span class="token punctuation">:</span> matchIndex<span class="token punctuation">,</span>
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<span class="token number">0</span>
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<span class="token punctuation">)</span> <span class="token operator">===</span> pattern<span class="token punctuation">.</span>length
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<span class="token operator">?</span> <span class="token boolean">true</span>
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<span class="token punctuation">:</span> <span class="token boolean">false</span><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">isSimilar</span><span class="token punctuation">(</span><span class="token string">'rt'</span><span class="token punctuation">,</span><span class="token string">'Rohit'</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
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<span class="token function">isSimilar</span><span class="token punctuation">(</span><span class="token string">'tr'</span><span class="token punctuation">,</span><span class="token string">'Rohit'</span><span class="token punctuation">);</span> <span class="token comment">// false</span>
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</pre></div><div class="card code-card"><div class="section card-content"><h4 id="jsontodate.md">JSONToDate</h4><p>Converts a JSON object to a date.</p><p>Use <code>Date()</code>, to convert dates in JSON format to readable format (<code>dd/mm/yyyy</code>).</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">JSONToDate</span> <span class="token operator">=</span> arr <span class="token operator">=></span> <span class="token punctuation">{</span>
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@ -188,21 +194,28 @@
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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="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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<span class="token keyword">let</span> matrix <span class="token operator">=</span> <span class="token function">Array</span><span class="token punctuation">(</span>string2<span class="token punctuation">.</span>length <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">).</span><span class="token function">fill</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">).</span><span class="token function">map</span><span class="token punctuation">((</span>x<span class="token punctuation">,</span>i<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">[</span>i<span class="token punctuation">]);</span>
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matrix<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span> <span class="token operator">=</span> <span class="token function">Array</span><span class="token punctuation">(</span>string1<span class="token punctuation">.</span>length <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">).</span><span class="token function">fill</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">).</span><span class="token function">map</span><span class="token punctuation">((</span>x<span class="token punctuation">,</span>i<span class="token punctuation">)</span> <span class="token operator">=></span> i<span class="token punctuation">);</span>
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<span class="token keyword">for</span><span class="token punctuation">(</span><span class="token keyword">let</span> i <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> i <span class="token operator"><=</span> string2<span class="token punctuation">.</span>length<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">) {</span>
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<span class="token keyword">for</span><span class="token punctuation">(</span><span class="token keyword">let</span> j <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> j<span class="token operator"><=</span>string1<span class="token punctuation">.</span>length<span class="token punctuation">;</span> j<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>string2<span class="token punctuation">[</span>i<span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator">===</span> string1<span class="token punctuation">[</span>j<span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">]) {</span>
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matrix<span class="token punctuation">[</span>i<span class="token punctuation">][</span>j<span class="token punctuation">]</span> <span class="token operator">=</span> matrix<span class="token punctuation">[</span>i<span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">][</span>j<span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">];
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}</span>
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<span class="token keyword">else</span><span class="token punctuation">{</span>
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matrix<span class="token punctuation">[</span>i<span class="token punctuation">][</span>j<span class="token punctuation">]</span> <span class="token operator">=</span> Math<span class="token punctuation">.</span><span class="token function">min</span><span class="token punctuation">(</span>matrix<span class="token punctuation">[</span>i<span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">][</span>j<span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">]</span><span class="token operator">+</span><span class="token number">1</span><span class="token punctuation">,</span> matrix<span class="token punctuation">[</span>i<span class="token punctuation">][</span>j<span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">]</span><span class="token operator">+</span><span class="token number">1</span><span class="token punctuation">,</span> matrix<span class="token punctuation">[</span>i<span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">][</span>j<span class="token punctuation">]</span><span class="token operator">+</span><span class="token number">1</span><span class="token punctuation">);
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}
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}
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}</span>
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<span class="token keyword">return</span> matrix<span class="token punctuation">[</span>string2<span class="token punctuation">.</span>length<span class="token punctuation">][</span>string1<span class="token punctuation">.</span>length<span class="token punctuation">];
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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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<span class="token keyword">let</span> matrix <span class="token operator">=</span> <span class="token function">Array</span><span class="token punctuation">(</span>string2<span class="token punctuation">.</span>length <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">)
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.</span><span class="token function">fill</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)
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.</span><span class="token function">map</span><span class="token punctuation">((</span>x<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">[</span>i<span class="token punctuation">]);</span>
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matrix<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span> <span class="token operator">=</span> <span class="token function">Array</span><span class="token punctuation">(</span>string1<span class="token punctuation">.</span>length <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">)
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.</span><span class="token function">fill</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)
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.</span><span class="token function">map</span><span class="token punctuation">((</span>x<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> i<span class="token punctuation">);</span>
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<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">let</span> i <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> i <span class="token operator"><=</span> string2<span class="token punctuation">.</span>length<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">) {</span>
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<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">let</span> j <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> j <span class="token operator"><=</span> string1<span class="token punctuation">.</span>length<span class="token punctuation">;</span> j<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>string2<span class="token punctuation">[</span>i <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator">===</span> string1<span class="token punctuation">[</span>j <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]) {</span>
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||||
matrix<span class="token punctuation">[</span>i<span class="token punctuation">][</span>j<span class="token punctuation">]</span> <span class="token operator">=</span> matrix<span class="token punctuation">[</span>i <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">][</span>j <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">];
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}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
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matrix<span class="token punctuation">[</span>i<span class="token punctuation">][</span>j<span class="token punctuation">]</span> <span class="token operator">=</span> Math<span class="token punctuation">.</span><span class="token function">min</span><span class="token punctuation">(</span>
|
||||
matrix<span class="token punctuation">[</span>i <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">][</span>j <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">,</span>
|
||||
matrix<span class="token punctuation">[</span>i<span class="token punctuation">][</span>j <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">,</span>
|
||||
matrix<span class="token punctuation">[</span>i <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">][</span>j<span class="token punctuation">]</span> <span class="token operator">+</span> <span class="token number">1</span>
|
||||
<span class="token punctuation">);
|
||||
}
|
||||
}
|
||||
}</span>
|
||||
<span class="token keyword">return</span> matrix<span class="token punctuation">[</span>string2<span class="token punctuation">.</span>length<span class="token punctuation">][</span>string1<span class="token punctuation">.</span>length<span class="token punctuation">];
|
||||
};</span>
|
||||
</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>
|
||||
<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>
|
||||
@ -217,7 +230,7 @@
|
||||
];</span>
|
||||
</pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">quickSort</span><span class="token punctuation">([</span><span class="token number">4</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">// [1,2,3,4]</span>
|
||||
<span class="token function">quickSort</span><span class="token punctuation">([</span><span class="token number">4</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 boolean">true</span><span class="token punctuation">);</span> <span class="token comment">// [4,3,2,1]</span>
|
||||
</pre></div><div class="card code-card"><div class="section card-content"><h4 id="removevowels.md">removeVowels</h4><p>Returns all the vowels in a <code>str</code> replaced by <code>repl</code>.</p><p>Use <code>String.replace()</code> with a regexp to replace all vowels in <code>str</code>. Omot <code>repl</code> to use a default value of <code>''</code>.</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> removeVowels <span class="token operator">=</span> <span class="token punctuation">(</span>str<span class="token punctuation">,</span> repl <span class="token operator">=</span> <span class="token string">''</span><span class="token punctuation">)</span> <span class="token operator">=></span> str<span class="token punctuation">.</span><span class="token function">replace</span><span class="token punctuation">(</span><span class="token regex">/[aeiou]/gi</span><span class="token punctuation">,</span>repl<span class="token punctuation">);</span>
|
||||
</pre></div><div class="card code-card"><div class="section card-content"><h4 id="removevowels.md">removeVowels</h4><p>Returns all the vowels in a <code>str</code> replaced by <code>repl</code>.</p><p>Use <code>String.replace()</code> with a regexp to replace all vowels in <code>str</code>. Omot <code>repl</code> to use a default value of <code>''</code>.</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> removeVowels <span class="token operator">=</span> <span class="token punctuation">(</span>str<span class="token punctuation">,</span> repl <span class="token operator">=</span> <span class="token string">''</span><span class="token punctuation">)</span> <span class="token operator">=></span> str<span class="token punctuation">.</span><span class="token function">replace</span><span class="token punctuation">(</span><span class="token regex">/[aeiou]/gi</span><span class="token punctuation">,</span> repl<span class="token punctuation">);</span>
|
||||
</pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">removeVowels</span><span class="token punctuation">(</span><span class="token string">"foobAr"</span><span class="token punctuation">);</span> <span class="token comment">// "fbr"</span>
|
||||
<span class="token function">removeVowels</span><span class="token punctuation">(</span><span class="token string">"foobAr"</span><span class="token punctuation">,</span><span class="token string">"*"</span><span class="token punctuation">);</span> <span class="token comment">// "f**b*r"</span>
|
||||
</pre></div><div class="card code-card"><div class="section card-content"><h4 id="solverpn.md">solveRPN</h4><p>Solves the given mathematical expression in <a href="https://en.wikipedia.org/wiki/Reverse_Polish_notation">reverse polish notation</a>. Throws appropriate errors if there are unrecognized symbols or the expression is wrong. The valid operators are :- <code>+</code>,<code>-</code>,<code>*</code>,<code>/</code>,<code>^</code>,<code>**</code> (<code>^</code>&<code>**</code> are the exponential symbols and are same). This snippet does not supports any unary operators.</p><p>Use a dictionary, <code>OPERATORS</code> to specify each operator's matching mathematical operation. Use <code>String.replace()</code> with a regular expression to replace <code>^</code> with <code>**</code>, <code>String.split()</code> to tokenize the string and <code>Array.filter()</code> to remove empty tokens. Use <code>Array.forEach()</code> to parse each <code>symbol</code>, evaluate it as a numeric value or operator and solve the mathematical expression. Numeric values are converted to floating point numbers and pushed to a <code>stack</code>, while operators are evaluated using the <code>OPERATORS</code> dictionary and pop elements from the <code>stack</code> to apply operations.</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">solveRPN</span> <span class="token operator">=</span> rpn <span class="token operator">=></span> <span class="token punctuation">{</span>
|
||||
|
||||
Reference in New Issue
Block a user