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# arr-flatten [](https://www.npmjs.com/package/arr-flatten) [](https://npmjs.org/package/arr-flatten) [](https://npmjs.org/package/arr-flatten) [](https://travis-ci.org/jonschlinkert/arr-flatten) [](https://ci.appveyor.com/project/jonschlinkert/arr-flatten)
> Recursively flatten an array or arrays.
## Install
Install with [npm](https://www.npmjs.com/):
```sh
$ npm install --save arr-flatten
```
## Install
Install with [bower](https://bower.io/)
```sh
$ bower install arr-flatten --save
```
## Usage
```js
var flatten = require('arr-flatten');
flatten(['a', ['b', ['c']], 'd', ['e']]);
//=> ['a', 'b', 'c', 'd', 'e']
```
## Why another flatten utility?
I wanted the fastest implementation I could find, with implementation choices that should work for 95% of use cases, but no cruft to cover the other 5%.
## About
### Related projects
* [arr-filter](https://www.npmjs.com/package/arr-filter): Faster alternative to javascript's native filter method. | [homepage](https://github.com/jonschlinkert/arr-filter "Faster alternative to javascript's native filter method.")
* [arr-union](https://www.npmjs.com/package/arr-union): Combines a list of arrays, returning a single array with unique values, using strict equality… [more](https://github.com/jonschlinkert/arr-union) | [homepage](https://github.com/jonschlinkert/arr-union "Combines a list of arrays, returning a single array with unique values, using strict equality for comparisons.")
* [array-each](https://www.npmjs.com/package/array-each): Loop over each item in an array and call the given function on every element. | [homepage](https://github.com/jonschlinkert/array-each "Loop over each item in an array and call the given function on every element.")
* [array-unique](https://www.npmjs.com/package/array-unique): Remove duplicate values from an array. Fastest ES5 implementation. | [homepage](https://github.com/jonschlinkert/array-unique "Remove duplicate values from an array. Fastest ES5 implementation.")
### Contributing
Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
### Contributors
| **Commits** | **Contributor** |
| --- | --- |
| 20 | [jonschlinkert](https://github.com/jonschlinkert) |
| 1 | [lukeed](https://github.com/lukeed) |
### Building docs
_(This project's readme.md is generated by [verb](https://github.com/verbose/verb-generate-readme), please don't edit the readme directly. Any changes to the readme must be made in the [.verb.md](.verb.md) readme template.)_
To generate the readme, run the following command:
```sh
$ npm install -g verbose/verb#dev verb-generate-readme && verb
```
### Running tests
Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:
```sh
$ npm install && npm test
```
### Author
**Jon Schlinkert**
* [github/jonschlinkert](https://github.com/jonschlinkert)
* [twitter/jonschlinkert](https://twitter.com/jonschlinkert)
### License
Copyright © 2017, [Jon Schlinkert](https://github.com/jonschlinkert).
Released under the [MIT License](LICENSE).
***
_This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.6.0, on July 05, 2017._
|
