public/subjects/flat/README.md

## Flat

### Instructions

Create a function named `flat` that works like `Array.flat()`, except its first argument is the array.

### Notions

- [Flat](https://devdocs.io/javascript/global_objects/array/flat)

### Code provided

> The provided code will be added to your solution, and does not need to be submitted.

```js
Array.prototype.flat = undefined
```