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30secondsofcode
2018-10-31 16:51:58 +00:00
parent d998d1a7f9
commit 0e58603310
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7
README.md
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@ -678,7 +678,7 @@ const sum = pipeAsyncFunctions(
x => x + 3, x => x + 3,
async x => (await x) + 4 async x => (await x) + 4
); );
(async () => { (async() => {
console.log(await sum(5)); // 15 (after one second) console.log(await sum(5)); // 15 (after one second)
})(); })();
``` ```
@ -2374,7 +2374,7 @@ sampleSize([1, 2, 3], 4); // [2,3,1]
### shank ### shank
Has the same functionality as [`Array.prototype.prototype.splice()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice), but returning a new array instead of mutating the original array. Has the same functionality as [`Array.prototype.splice()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice), but returning a new array instead of mutating the original array.
Use `Array.prototype.slice()` and `Array.prototype.concat()` to get a new array with the new contents after removing existing elements and/or adding new elements. Use `Array.prototype.slice()` and `Array.prototype.concat()` to get a new array with the new contents after removing existing elements and/or adding new elements.
Omit the second argument, `index`, to start at `0`. Omit the second argument, `index`, to start at `0`.
@ -2399,7 +2399,6 @@ const namesNoBravo = shank(names, 1, 1); // [ 'alpha', 'charlie' ]
console.log(names); // ['alpha', 'bravo', 'charlie'] console.log(names); // ['alpha', 'bravo', 'charlie']
``` ```
</details> </details>
<br>[⬆ Back to top](#table-of-contents) <br>[⬆ Back to top](#table-of-contents)
@ -2790,7 +2789,7 @@ takeWhile([1, 2, 3, 4], n => n >= 3); // [1, 2]
Reduces a given Array-like into a value hash (keyed data store). Reduces a given Array-like into a value hash (keyed data store).
Given an Iterable or Array-like structure, call `Array.prototype.prototype.reduce.call()` on the provided object to step over it and return an Object, keyed by the reference value. Given an Iterable or Array-like structure, call `Array.prototype.reduce.call()` on the provided object to step over it and return an Object, keyed by the reference value.
```js ```js
const toHash = (object, key) => const toHash = (object, key) =>

2
docs/adapter.html
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@ -131,7 +131,7 @@ Object<span class="token punctuation">.</span><span class="token function">assig
x <span class="token operator">=></span> x <span class="token operator">+</span> <span class="token number">3</span><span class="token punctuation">,</span> x <span class="token operator">=></span> x <span class="token operator">+</span> <span class="token number">3</span><span class="token punctuation">,</span>
<span class="token keyword">async</span> x <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token keyword">await</span> x<span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token number">4</span> <span class="token keyword">async</span> x <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token keyword">await</span> x<span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token number">4</span>
<span class="token punctuation">); <span class="token punctuation">);
(</span><span class="token keyword">async</span> <span class="token punctuation">()</span> <span class="token operator">=></span> <span class="token punctuation">{</span> (</span><span class="token keyword">async</span><span class="token punctuation">()</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token keyword">await</span> <span class="token function">sum</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">));</span> <span class="token comment">// 15 (after one second)</span> console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token keyword">await</span> <span class="token function">sum</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">));</span> <span class="token comment">// 15 (after one second)</span>
<span class="token punctuation">})();</span> <span class="token punctuation">})();</span>
</pre></div><div class="card code-card"><div class="corner intermediate"></div><div class="section card-content"><h4 id="pipefunctions">pipeFunctions</h4><p>Performs left-to-right function composition.</p><p>Use <code>Array.prototype.reduce()</code> with the spread operator (<code>...</code>) to perform left-to-right function composition. The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.</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">pipeFunctions</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>fns<span class="token punctuation">)</span> <span class="token operator">=></span> fns<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>f<span class="token punctuation">,</span> g<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">g</span><span class="token punctuation">(</span><span class="token function">f</span><span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)));</span> </pre></div><div class="card code-card"><div class="corner intermediate"></div><div class="section card-content"><h4 id="pipefunctions">pipeFunctions</h4><p>Performs left-to-right function composition.</p><p>Use <code>Array.prototype.reduce()</code> with the spread operator (<code>...</code>) to perform left-to-right function composition. The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.</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">pipeFunctions</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">...</span>fns<span class="token punctuation">)</span> <span class="token operator">=></span> fns<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>f<span class="token punctuation">,</span> g<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">g</span><span class="token punctuation">(</span><span class="token function">f</span><span class="token punctuation">(</span><span class="token operator">...</span>args<span class="token punctuation">)));</span>

4
docs/index.html
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@ -423,7 +423,7 @@
};</span> };</span>
</pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">sampleSize</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">2</span><span class="token punctuation">);</span> <span class="token comment">// [3,1]</span> </pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">sampleSize</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">2</span><span class="token punctuation">);</span> <span class="token comment">// [3,1]</span>
<span class="token function">sampleSize</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">4</span><span class="token punctuation">);</span> <span class="token comment">// [2,3,1]</span> <span class="token function">sampleSize</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">4</span><span class="token punctuation">);</span> <span class="token comment">// [2,3,1]</span>
</pre></div><div class="card code-card"><div class="corner intermediate"></div><div class="section card-content"><h4 id="shank">shank</h4><p>Has the same functionality as <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice"><code>Array.prototype.prototype.splice()</code></a>, but returning a new array instead of mutating the original array.</p><p>Use <code>Array.prototype.slice()</code> and <code>Array.prototype.concat()</code> to get a new array with the new contents after removing existing elements and/or adding new elements. Omit the second argument, <code>index</code>, to start at <code>0</code>. Omit the third argument, <code>delCount</code>, to remove <code>0</code> elements. Omit the fourth argument, <code>elements</code>, in order to not add any new elements.</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">shank</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> index <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">,</span> delCount <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token operator">...</span>elements<span class="token punctuation">)</span> <span class="token operator">=></span> </pre></div><div class="card code-card"><div class="corner intermediate"></div><div class="section card-content"><h4 id="shank">shank</h4><p>Has the same functionality as <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice"><code>Array.prototype.splice()</code></a>, but returning a new array instead of mutating the original array.</p><p>Use <code>Array.prototype.slice()</code> and <code>Array.prototype.concat()</code> to get a new array with the new contents after removing existing elements and/or adding new elements. Omit the second argument, <code>index</code>, to start at <code>0</code>. Omit the third argument, <code>delCount</code>, to remove <code>0</code> elements. Omit the fourth argument, <code>elements</code>, in order to not add any new elements.</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">shank</span> <span class="token operator">=</span> <span class="token punctuation">(</span>arr<span class="token punctuation">,</span> index <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">,</span> delCount <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token operator">...</span>elements<span class="token punctuation">)</span> <span class="token operator">=></span>
arr arr
<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> index<span class="token punctuation">) <span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> index<span class="token punctuation">)
.</span><span class="token function">concat</span><span class="token punctuation">(</span>elements<span class="token punctuation">) .</span><span class="token function">concat</span><span class="token punctuation">(</span>elements<span class="token punctuation">)
@ -520,7 +520,7 @@ console<span class="token punctuation">.</span><span class="token function">log<
<span class="token keyword">return</span> arr<span class="token punctuation">; <span class="token keyword">return</span> arr<span class="token punctuation">;
};</span> };</span>
</pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">takeWhile</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">4</span><span class="token punctuation">],</span> n <span class="token operator">=></span> n <span class="token operator">>=</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// [1, 2]</span> </pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">takeWhile</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">4</span><span class="token punctuation">],</span> n <span class="token operator">=></span> n <span class="token operator">>=</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// [1, 2]</span>
</pre></div><div class="card code-card"><div class="corner intermediate"></div><div class="section card-content"><h4 id="tohash">toHash</h4><p>Reduces a given Array-like into a value hash (keyed data store).</p><p>Given an Iterable or Array-like structure, call <code>Array.prototype.prototype.reduce.call()</code> on the provided object to step over it and return an Object, keyed by the reference value.</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">toHash</span> <span class="token operator">=</span> <span class="token punctuation">(</span>object<span class="token punctuation">,</span> key<span class="token punctuation">)</span> <span class="token operator">=></span> </pre></div><div class="card code-card"><div class="corner intermediate"></div><div class="section card-content"><h4 id="tohash">toHash</h4><p>Reduces a given Array-like into a value hash (keyed data store).</p><p>Given an Iterable or Array-like structure, call <code>Array.prototype.reduce.call()</code> on the provided object to step over it and return an Object, keyed by the reference value.</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">toHash</span> <span class="token operator">=</span> <span class="token punctuation">(</span>object<span class="token punctuation">,</span> key<span class="token punctuation">)</span> <span class="token operator">=></span>
Array<span class="token punctuation">.</span>prototype<span class="token punctuation">.</span>reduce<span class="token punctuation">.</span><span class="token function">call</span><span class="token punctuation">(</span> Array<span class="token punctuation">.</span>prototype<span class="token punctuation">.</span>reduce<span class="token punctuation">.</span><span class="token function">call</span><span class="token punctuation">(</span>
object<span class="token punctuation">, object<span class="token punctuation">,
(</span>acc<span class="token punctuation">,</span> data<span class="token punctuation">,</span> index<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>acc<span class="token punctuation">[</span><span class="token operator">!</span>key <span class="token operator">?</span> index <span class="token punctuation">:</span> data<span class="token punctuation">[</span>key<span class="token punctuation">]]</span> <span class="token operator">=</span> data<span class="token punctuation">),</span> acc<span class="token punctuation">), (</span>acc<span class="token punctuation">,</span> data<span class="token punctuation">,</span> index<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>acc<span class="token punctuation">[</span><span class="token operator">!</span>key <span class="token operator">?</span> index <span class="token punctuation">:</span> data<span class="token punctuation">[</span>key<span class="token punctuation">]]</span> <span class="token operator">=</span> data<span class="token punctuation">),</span> acc<span class="token punctuation">),

2
snippets/pipeAsyncFunctions.md
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@ -17,7 +17,7 @@ const sum = pipeAsyncFunctions(
x => x + 3, x => x + 3,
async x => (await x) + 4 async x => (await x) + 4
); );
(async () => { (async() => {
console.log(await sum(5)); // 15 (after one second) console.log(await sum(5)); // 15 (after one second)
})(); })();
``` ```