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"Sorting with map": clarify example #3133

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Mar 15, 2021
Merged

"Sorting with map": clarify example #3133

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13 changes: 5 additions & 8 deletions files/en-us/web/javascript/reference/global_objects/array/sort/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -221,15 +221,15 @@ <h3 id="Sorting_with_map">Sorting with map</h3>
temporary array to achieve the right order.</p>

<pre class="brush: js">// the array to be sorted
var list = ['Delta', 'alpha', 'CHARLIE', 'bravo'];
const in = ['delta', 'alpha', 'charlie', 'bravo'];

// temporary array holds objects with position and sort-value
var mapped = list.map(function(el, i) {
return { index: i, value: el.toLowerCase() };
const mapped = in.map((v, i) => {
return { i, value: someSlowOperation(v) };
})

// sorting the mapped array containing the reduced values
mapped.sort(function(a, b) {
mapped.sort((a, b) => {
if (a.value &gt; b.value) {
return 1;
}
Expand All @@ -239,10 +239,7 @@ <h3 id="Sorting_with_map">Sorting with map</h3>
return 0;
});

// container for the resulting order
var result = mapped.map(function(el){
return list[el.index];
});
const result = mapped.map(v => in[v.i]);
</pre>

<p>There is an open source library available called <a
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