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Travis build: 733 [ci skip]

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2017-12-31 13:18:31 +00:00
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@ -882,16 +882,17 @@ isString('10'); // true
</code></pre></div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="issymbol">isSymbol</h3></div><div class="section double-padded"><p>Checks if the given argument is a symbol.</p><p>Use <code>typeof</code> to check if a value is classified as a symbol primitive.</p><pre><code class="language-js">const isSymbol = val =&gt; typeof val === 'symbol';
</code></pre><pre><code class="language-js">isSymbol('x'); // false
isSymbol(Symbol('x')); // true
</code></pre></div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="isvalidjson">isValidJSON</h3></div><div class="section double-padded"><p>Checks if the provided argument is a valid JSON.</p><p>Use <code>JSON.parse()</code> and a <code>try... catch</code> block to check if the provided argument is a valid JSON and non-null.</p><pre><code class="language-js">const isValidJSON = obj =&gt; {
</code></pre></div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="isvalidjson">isValidJSON</h3></div><div class="section double-padded"><p>Checks if the provided argument is a valid JSON.</p><p>Use <code>JSON.parse()</code> and a <code>try... catch</code> block to check if the provided argument is a valid JSON.</p><pre><code class="language-js">const isValidJSON = obj =&gt; {
try {
JSON.parse(obj);
return !!obj;
return true;
} catch (e) {
return false;
}
};
</code></pre><pre><code class="language-js">isValidJSON('{&quot;name&quot;:&quot;Adam&quot;,&quot;age&quot;:20}'); // true
isValidJSON('{&quot;name&quot;:&quot;Adam&quot;,age:&quot;20&quot;}'); // false
isValidJSON(null); // true
</code></pre></div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="randomhexcolorcode">randomHexColorCode</h3></div><div class="section double-padded"><p>Generates a random hexadecimal color code.</p><p>Use <code>Math.random</code> to generate a random 24-bit(6x4bits) hexadecimal number. Use bit shifting and then convert it to an hexadecimal String using <code>toString(16)</code>.</p><pre><code class="language-js">const randomHexColorCode = () =&gt; {
let n = ((Math.random() * 0xfffff) | 0).toString(16);
return '#' + (n.length !== 6 ? ((Math.random() * 0xf) | 0).toString(16) + n : n);