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30-seconds-of-code/snippets/shuffle.md
2017-12-26 14:24:04 +01:00

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### shuffle
Randomizes the order of the values of an array, in place.
Uses the Fisher-Yates algoritm to reorder the elements of the array, based on the [Lodash implimentation](https://github.com/lodash/lodash/blob/b2ea6b1cd251796dcb5f9700c4911a7b6223920b/shuffle.js)
```js
const shuffle = ([...arr]) => {
let m = arr.length;
while (m) {
const i = Math.floor(Math.random() * m--);
[arr[m], arr[i]] = [arr[i], arr[m]];
}
return arr;
};
// shuffle([1,2,3]) -> [2,3,1]
```