[JavaScript] How to flatten array of arrays?

Question

I want to create an array of single dimension from the multi dimension arrays, how can I do that in Javascript?

Meera · Accepted Answer

You can use either of the below approaches to flatten array of arrays into single array

## 1. Using flat()
```js
arr.flat()
```

## 2. Using Concat() + reduce()

```js
arr.reduce((acc, val) => acc.concat(val), [])

```

1 Answer