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30-seconds-of-code/snippets/flatten.md
Angelos Chalaris 5c2eeb3bcc Updated examples
2017-12-27 16:06:16 +02:00

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### flatten
Flattens an array.
Use a new array and concatenate it with the spread input array causing a shallow denesting of any contained arrays.
```js
const flatten = arr => [ ].concat( ...arr );
```
```js
flatten([1,[2],3,4]) // [1,2,3,4]
```