Travis build: 1405

README.md

@@ -2246,10 +2246,10 @@ without([2, 1, 2, 3], 1, 2); // [3]
 
 Creates a new array out of the two supplied by creating each possible pair from the arrays.
 
-Use `Array.map()` to produce every possible pair from the elements of the two arrays.
+Use `Array.reduce()`, `Array.map()` and `Array.concat()` to produce every possible pair from the elements of the two arrays and save them in an array.
 
 ```js
-const xProd = (a, b) => a.map(x => b.map(y => [x, y]));
+const xProd = (a, b) => a.reduce((acc, x) => acc.concat(b.map(y => [x, y])), []);
 ```
 
 <details>

docs/index.html

@@ -422,7 +422,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">unzipWith</span><span class="token punctuation">([[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">], [</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">20</span><span class="token punctuation">,</span> <span class="token number">200</span><span class="token punctuation">]], (</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> args<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> v<span class="token punctuation">)</span> <span class="token operator">=></span> acc <span class="token operator">+</span> v<span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">));</span> <span class="token comment">// [3, 30, 300]</span>
 </pre><button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="without" class="section double-padded">without</h3><div class="section double-padded"><p>Filters out the elements of an array, that have one of the specified values.</p><p>Use <code>Array.filter()</code> to create an array excluding(using <code>!Array.includes()</code>) all given values.</p><p><em>(For a snippet that mutates the original array see <a href="#pull"><code>pull</code></a>)</em></p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">without</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> <span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> arr<span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span>v <span class="token operator">=> !</span>args<span class="token punctuation">.</span><span class="token function">includes</span><span class="token punctuation">(</span>v<span class="token punctuation">));</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">without</span><span class="token punctuation">([</span><span class="token number">2</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 number">1</span><span class="token punctuation">,</span> <span class="token number">2</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 class="card fluid"><h3 id="xprod" class="section double-padded">xProd</h3><div class="section double-padded"><p>Creates a new array out of the two supplied by creating each possible pair from the arrays.</p><p>Use <code>Array.map()</code> to produce every possible pair from the elements of the two arrays.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">xProd</span> <span class="token operator">=</span> <span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> a<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span>x <span class="token operator">=></span> b<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span>y <span class="token operator">=></span> <span class="token punctuation">[</span>x<span class="token punctuation">,</span> y<span class="token punctuation">]));</span>
+</pre><button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="xprod" class="section double-padded">xProd</h3><div class="section double-padded"><p>Creates a new array out of the two supplied by creating each possible pair from the arrays.</p><p>Use <code>Array.reduce()</code>, <code>Array.map()</code> and <code>Array.concat()</code> to produce every possible pair from the elements of the two arrays and save them in an array.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">xProd</span> <span class="token operator">=</span> <span class="token punctuation">(</span>a<span class="token punctuation">,</span> b<span class="token punctuation">)</span> <span class="token operator">=></span> a<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> x<span class="token punctuation">)</span> <span class="token operator">=></span> acc<span class="token punctuation">.</span><span class="token function">concat</span><span class="token punctuation">(</span>b<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span>y <span class="token operator">=></span> <span class="token punctuation">[</span>x<span class="token punctuation">,</span> y<span class="token punctuation">])), []);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">xProd</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 string">'a'</span><span class="token punctuation">,</span> <span class="token string">'b'</span><span class="token punctuation">]);</span> <span class="token comment">// [[1, 'a'], [1, 'b'], [2, 'a'], [2, 'b']]</span>
 </pre><button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="zip" class="section double-padded">zip</h3><div class="section double-padded"><p>Creates an array of elements, grouped based on the position in the original arrays.</p><p>Use <code>Math.max.apply()</code> to get the longest array in the arguments. Creates an array with that length as return value and use <code>Array.from()</code> with a map-function to create an array of grouped elements. If lengths of the argument-arrays vary, <code>undefined</code> is used where no value could be found.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">zip</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>arrays<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
   <span class="token keyword">const</span> maxLength <span class="token operator">=</span> Math<span class="token punctuation">.</span><span class="token function">max</span><span class="token punctuation">(</span><span class="token operator">...</span>arrays<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span>x <span class="token operator">=></span> x<span class="token punctuation">.</span>length<span class="token punctuation">));</span>

snippets/xProd.md

@@ -5,7 +5,7 @@ Creates a new array out of the two supplied by creating each possible pair from
 Use `Array.reduce()`, `Array.map()` and `Array.concat()` to produce every possible pair from the elements of the two arrays and save them in an array.
 
 ```js
-const xProd = (a, b) => a.reduce((acc,x) => acc.concat(b.map(y => [x, y])),[]);
+const xProd = (a, b) => a.reduce((acc, x) => acc.concat(b.map(y => [x, y])), []);
 ```
 
 ```js