> Return an array free of duplicate values. Fastest ES5 implementation.
## Install with [npm](npmjs.org)
```bash
npm i array-unique --save
```
## Usage
```js
var unique = require('array-unique');
unique(['a', 'b', 'c', 'c']);
//=> ['a', 'b', 'c']
```
## Related
* [arr-diff](https://github.com/jonschlinkert/arr-diff): Returns an array with only the unique values from the first array, by excluding all values from additional arrays using strict equality for comparisons.
* [arr-union](https://github.com/jonschlinkert/arr-union): Returns an array of unique values using strict equality for comparisons.
* [arr-flatten](https://github.com/jonschlinkert/arr-flatten): Recursively flatten an array or arrays. This is the fastest implementation of array flatten.
* [arr-reduce](https://github.com/jonschlinkert/arr-reduce): Fast array reduce that also loops over sparse elements.
* [arr-map](https://github.com/jonschlinkert/arr-map): Faster, node.js focused alternative to JavaScript's native array map.
* [arr-pluck](https://github.com/jonschlinkert/arr-pluck): Retrieves the value of a specified property from all elements in the collection.
## Run tests
Install dev dependencies.
```bash
npm i -d && npm test
```
## Contributing
Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](https://github.com/jonschlinkert/array-unique/issues)
