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30secondsofcode
2018-09-03 07:09:33 +00:00
parent 9b83866f62
commit 6ceeb443dd
2 changed files with 4 additions and 4 deletions
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4
README.md
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@ -5569,7 +5569,7 @@ If the second parameter, `end`, is not specified, the range is considered to be
```js
const inRange = (n, start, end = null) => {
if (end && start > end) end = [start, (start = end)][0];
if (end && start > end) [end, start] = [start, end];
return end == null ? n >= 0 && n < start : n >= start && n < end;
};
```
@ -5581,7 +5581,7 @@ const inRange = (n, start, end = null) => {
inRange(3, 2, 5); // true
inRange(3, 4); // true
inRange(2, 3, 5); // false
inrange(3, 2); // false
inRange(3, 2); // false
```
</details>

4
docs/math.html
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@ -167,13 +167,13 @@ own individual rating by supplying it as the third argument.
</pre><button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="hammingdistance" class="section double-padded">hammingDistance</h3><div class="section double-padded"><p>Calculates the Hamming distance between two values.</p><p>Use XOR operator (<code>^</code>) to find the bit difference between the two numbers, convert to a binary string using <code>toString(2)</code>. Count and return the number of <code>1</code>s in the string, using <code>match(/1/g)</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">hammingDistance</span> <span class="token operator">=</span> <span class="token punctuation">(</span>num1<span class="token punctuation">,</span> num2<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>num1 <span class="token operator">^</span> num2<span class="token punctuation">).</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">).</span><span class="token function">match</span><span class="token punctuation">(</span><span class="token regex">/1/g</span><span class="token punctuation">)</span> <span class="token operator">||</span> <span class="token string">''</span><span class="token punctuation">).</span>length<span class="token punctuation">;</span>
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">hammingDistance</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 comment">// 1</span>
</pre><button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="inrange" class="section double-padded">inRange</h3><div class="section double-padded"><p>Checks if the given number falls within the given range.</p><p>Use arithmetic comparison to check if the given number is in the specified range. If the second parameter, <code>end</code>, is not specified, the range is considered to be from <code>0</code> to <code>start</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">inRange</span> <span class="token operator">=</span> <span class="token punctuation">(</span>n<span class="token punctuation">,</span> start<span class="token punctuation">,</span> end <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>end <span class="token operator">&amp;&amp;</span> start <span class="token operator">></span> end<span class="token punctuation">)</span> end <span class="token operator">=</span> <span class="token punctuation">[</span>start<span class="token punctuation">, (</span>start <span class="token operator">=</span> end<span class="token punctuation">)][</span><span class="token number">0</span><span class="token punctuation">];</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>end <span class="token operator">&amp;&amp;</span> start <span class="token operator">></span> end<span class="token punctuation">) [</span>end<span class="token punctuation">,</span> start<span class="token punctuation">]</span> <span class="token operator">=</span> <span class="token punctuation">[</span>start<span class="token punctuation">,</span> end<span class="token punctuation">];</span>
<span class="token keyword">return</span> end <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">?</span> n <span class="token operator">>=</span> <span class="token number">0</span> <span class="token operator">&amp;&amp;</span> n <span class="token operator">&lt;</span> start <span class="token punctuation">:</span> n <span class="token operator">>=</span> start <span class="token operator">&amp;&amp;</span> n <span class="token operator">&lt;</span> end<span class="token punctuation">;
};</span>
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">inRange</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 number">5</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
<span class="token function">inRange</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 comment">// true</span>
<span class="token function">inRange</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">// false</span>
<span class="token function">inrange</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">// false</span>
<span class="token function">inRange</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">// false</span>
</pre><button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="isdivisible" class="section double-padded">isDivisible</h3><div class="section double-padded"><p>Checks if the first numeric argument is divisible by the second one.</p><p>Use the modulo operator (<code>%</code>) to check if the remainder is equal to <code>0</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">isDivisible</span> <span class="token operator">=</span> <span class="token punctuation">(</span>dividend<span class="token punctuation">,</span> divisor<span class="token punctuation">)</span> <span class="token operator">=></span> dividend <span class="token operator">%</span> divisor <span class="token operator">===</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">isDivisible</span><span class="token punctuation">(</span><span class="token number">6</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// true</span>
</pre><button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="iseven" class="section double-padded">isEven</h3><div class="section double-padded"><p>Returns <code>true</code> if the given number is even, <code>false</code> otherwise.</p><p>Checks whether a number is odd or even using the modulo (<code>%</code>) operator. Returns <code>true</code> if the number is even, <code>false</code> if the number is odd.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">isEven</span> <span class="token operator">=</span> num <span class="token operator">=></span> num <span class="token operator">%</span> <span class="token number">2</span> <span class="token operator">===</span> <span class="token number">0</span><span class="token punctuation">;</span>