Make multi-dimensional arrays as flat as a pancake
npm install 1d
```
npm install 1d
`js
const flatten = require('1d');
flatten( [['a'], 'b', ['c', ['d']]] );
// ['a', 'b', 'c', 'd']
`
> OBS: This is a built-in feature from Node.js 11.15.0 and up. Check out
Array.prototype.flat
Flatten an array into a sweet 1D array
#### arr
Type: Array
Input array to flatten
#### res
Type: Array[]`
Default:
Initial array.
> Note: The inital array is not being flattened
MIT © Terkel Gjervig