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30secondsofcode
2018-06-18 18:26:52 +00:00
parent 5d79b0a165
commit 3197d6ddce
13 changed files with 40 additions and 31 deletions
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@ -89,8 +89,8 @@
<span class="token punctuation">:</span> num <span class="token operator">===</span> <span class="token number">12</span>
<span class="token operator">?</span> <span class="token number">12</span> <span class="token operator">+</span> <span class="token string">'pm'</span>
<span class="token punctuation">:</span> num <span class="token operator">&lt;</span> <span class="token number">12</span>
<span class="token operator">?</span> num <span class="token operator">%</span> <span class="token number">12</span> <span class="token operator">+</span> <span class="token string">'am'</span>
<span class="token punctuation">:</span> num <span class="token operator">%</span> <span class="token number">12</span> <span class="token operator">+</span> <span class="token string">'pm'</span><span class="token punctuation">;</span>
<span class="token operator">?</span> <span class="token punctuation">(</span>num <span class="token operator">%</span> <span class="token number">12</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">'am'</span>
<span class="token punctuation">: (</span>num <span class="token operator">%</span> <span class="token number">12</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">'pm'</span><span class="token punctuation">;</span>
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">getMeridiemSuffixOfInteger</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">);</span> <span class="token comment">// "12am"</span>
<span class="token function">getMeridiemSuffixOfInteger</span><span class="token punctuation">(</span><span class="token number">11</span><span class="token punctuation">);</span> <span class="token comment">// "11am"</span>
<span class="token function">getMeridiemSuffixOfInteger</span><span class="token punctuation">(</span><span class="token number">13</span><span class="token punctuation">);</span> <span class="token comment">// "1pm"</span>
@ -111,7 +111,7 @@
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">last</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 comment">// 3</span>
</pre><button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div></div></div><div class="row"><div class="col-sm-12 col-md-10 col-lg-8 col-md-offset-1 col-lg-offset-2"><div class="card fluid"><h3 id="lcm.md" class="section double-padded">lcm</h3><div class="section double-padded"><p>Returns the least common multiple of two or more numbers.</p><p>Use the greatest common divisor (GCD) formula and the fact that <code>lcm(x,y) = x * y / gcd(x,y)</code> to determine the least common multiple. The GCD formula uses recursion.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">lcm</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>arr<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
<span class="token keyword">const</span> <span class="token function-variable function">gcd</span> <span class="token operator">=</span> <span class="token punctuation">(</span>x<span class="token punctuation">,</span> y<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">!</span>y <span class="token operator">?</span> x <span class="token punctuation">:</span> <span class="token function">gcd</span><span class="token punctuation">(</span>y<span class="token punctuation">,</span> x <span class="token operator">%</span> y<span class="token punctuation">));</span>
<span class="token keyword">const</span> <span class="token function-variable function">_lcm</span> <span class="token operator">=</span> <span class="token punctuation">(</span>x<span class="token punctuation">,</span> y<span class="token punctuation">)</span> <span class="token operator">=></span> x <span class="token operator">*</span> y <span class="token operator">/</span> <span class="token function">gcd</span><span class="token punctuation">(</span>x<span class="token punctuation">,</span> y<span class="token punctuation">);</span>
<span class="token keyword">const</span> <span class="token function-variable function">_lcm</span> <span class="token operator">=</span> <span class="token punctuation">(</span>x<span class="token punctuation">,</span> y<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span>x <span class="token operator">*</span> y<span class="token punctuation">)</span> <span class="token operator">/</span> <span class="token function">gcd</span><span class="token punctuation">(</span>x<span class="token punctuation">,</span> y<span class="token punctuation">);</span>
<span class="token keyword">return</span> <span class="token punctuation">[</span><span class="token operator">...</span>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 function">_lcm</span><span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">));
};</span>
</pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">lcm</span><span class="token punctuation">(</span><span class="token number">12</span><span class="token punctuation">,</span> <span class="token number">7</span><span class="token punctuation">);</span> <span class="token comment">// 84</span>