# Simple snippet to shuffle array

If you need to shuffle the elements of an array, you can use this simple function:

```js
function shuffle(array) {
  const copy = [...array]

  return copy.sort(() => Math.random() - 0.5)
}
```

### The algorithm

1. Creates a copy of the parameter to not modify the original array
2. Uses the function `Array.prototype.sort` of the copy to randomly sort the array with a callback that always returns `Math.random() - 0.5` (The random factor).

### Example

```js
const example = [1, 2, 3]

const shuffled = shuffle(example)

/*
  shuffled is one of these:
  - [1, 2, 3]
  - [1, 3, 2]
  - [2, 1, 3]
  - [2, 3, 1]
  - [3, 1, 2]
  - [3, 2, 1]
*/
```