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Angelos Chalaris
2017-12-20 11:34:13 +02:00
parent 348645a284
commit 59b3b901b5
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@ -154,6 +154,7 @@
</h3><a class="sublink-1" href="#cleanobj">cleanObj</a>
<a class="sublink-1" href="#objectfrompairs">objectFromPairs</a>
<a class="sublink-1" href="#objecttopairs">objectToPairs</a>
<a class="sublink-1" href="#orderby">orderBy</a>
<a class="sublink-1" href="#select">select</a>
<a class="sublink-1" href="#shallowclone">shallowClone</a>
<a class="sublink-1" href="#truthcheckcollection">truthCheckCollection</a>
@ -964,6 +965,27 @@ Also if you give it a special key (<code>childIndicator</code>) it will search d
<pre><code class="language-js">const objectToPairs = obj =&gt; Object.keys(obj).map(k =&gt; [k, obj[k]]);
// objectToPairs({a: 1, b: 2}) -&gt; [['a',1],['b',2]])
</code></pre>
</div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="orderby">orderBy</h3></div><div class="section double-padded">
<p>Returns a sorted array of objects ordered by properties and orders.</p>
<p>Uses a custom implementation of sort, that reduces the props array argument with a default value of 0, it uses destructuring to swap the properties position depending on the order passed.
If no orders array is passed it sort by 'asc' by default.</p>
<pre><code class="language-js">const orderBy = (arr, props, orders) =&gt;
arr.sort((a, b) =&gt;
props.reduce((acc, prop, i) =&gt; {
if (acc === 0) {
const [p1, p2] = orders[i] === 'asc' ? [a[prop], b[prop]] : [b[prop], a[prop]];
acc = p1 &gt; p2 ? 1 : p1 &lt; p2 ? -1 : 0;
}
return acc;
}, 0)
);
/*
const users = [{ 'name': 'fred', 'age': 48 },{ 'name': 'barney', 'age': 36 },
{ 'name': 'fred', 'age': 40 },{ 'name': 'barney', 'age': 34 }];
orderby(users, ['name', 'age'], ['asc', 'desc']) -&gt; [{name: 'barney', age: 36}, {name: 'barney', age: 34}, {name: 'fred', age: 48}, {name: 'fred', age: 40}]
orderby(users, ['name', 'age']) -&gt; [{name: 'barney', age: 34}, {name: 'barney', age: 36}, {name: 'fred', age: 40}, {name: 'fred', age: 48}]
*/
</code></pre>
</div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="select">select</h3></div><div class="section double-padded">
<p>Retrieve a property that indicated by the selector from object.</p>
<p>If property not exists returns <code>undefined</code>.</p>