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30-seconds-of-code/snippets/shuffle.md
Angelos Chalaris 0425ebefe7 Archive, multitagging, cleanup
Cleaned up the current snippets for consistency and minor problems, added multiple tags to most of them, archived a few.
2018-01-05 16:33:54 +02:00

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### shuffle
Randomizes the order of the values of an array, returning a new array.
Uses the [Fisher-Yates algorithm](https://github.com/chalarangelo/30-seconds-of-code#shuffle) to reorder the elements of the array.
```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;
};
```
```js
const foo = [1, 2, 3];
shuffle(foo); // [2,3,1], foo = [1,2,3]
```