068b92d085
The implementation of shuffle is a pure function, so it returns a new array instead of shuffling the input in place.
18 lines
526 B
Markdown
18 lines
526 B
Markdown
### shuffle
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Randomizes the order of the values of an array, returning a new array.
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Uses the Fisher-Yates algoritm to reorder the elements of the array, based on the [Lodash implementation](https://github.com/lodash/lodash/blob/b2ea6b1cd251796dcb5f9700c4911a7b6223920b/shuffle.js), but as a pure function.
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```js
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const shuffle = ([...arr]) => {
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let m = arr.length;
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while (m) {
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const i = Math.floor(Math.random() * m--);
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[arr[m], arr[i]] = [arr[i], arr[m]];
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}
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return arr;
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};
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// shuffle([1,2,3]) -> [2,3,1]
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```
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