1 # array-unique [![NPM version](https://img.shields.io/npm/v/array-unique.svg?style=flat)](https://www.npmjs.com/package/array-unique) [![NPM downloads](https://img.shields.io/npm/dm/array-unique.svg?style=flat)](https://npmjs.org/package/array-unique) [![Build Status](https://img.shields.io/travis/jonschlinkert/array-unique.svg?style=flat)](https://travis-ci.org/jonschlinkert/array-unique)
3 Remove duplicate values from an array. Fastest ES5 implementation.
7 Install with [npm](https://www.npmjs.com/):
10 $ npm install --save array-unique
16 var unique = require('array-unique');
18 var arr = ['a', 'b', 'c', 'c'];
19 console.log(unique(arr)) //=> ['a', 'b', 'c']
20 console.log(arr) //=> ['a', 'b', 'c']
22 /* The above modifies the input array. To prevent that at a slight performance cost: */
23 var unique = require("array-unique").immutable;
25 var arr = ['a', 'b', 'c', 'c'];
26 console.log(unique(arr)) //=> ['a', 'b', 'c']
27 console.log(arr) //=> ['a', 'b', 'c', 'c']
34 * [arr-diff](https://www.npmjs.com/package/arr-diff): Returns an array with only the unique values from the first array, by excluding all… [more](https://github.com/jonschlinkert/arr-diff) | [homepage](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.")
35 * [arr-flatten](https://www.npmjs.com/package/arr-flatten): Recursively flatten an array or arrays. This is the fastest implementation of array flatten. | [homepage](https://github.com/jonschlinkert/arr-flatten "Recursively flatten an array or arrays. This is the fastest implementation of array flatten.")
36 * [arr-map](https://www.npmjs.com/package/arr-map): Faster, node.js focused alternative to JavaScript's native array map. | [homepage](https://github.com/jonschlinkert/arr-map "Faster, node.js focused alternative to JavaScript's native array map.")
37 * [arr-pluck](https://www.npmjs.com/package/arr-pluck): Retrieves the value of a specified property from all elements in the collection. | [homepage](https://github.com/jonschlinkert/arr-pluck "Retrieves the value of a specified property from all elements in the collection.")
38 * [arr-reduce](https://www.npmjs.com/package/arr-reduce): Fast array reduce that also loops over sparse elements. | [homepage](https://github.com/jonschlinkert/arr-reduce "Fast array reduce that also loops over sparse elements.")
39 * [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.")
43 Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).
47 _(This document was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme) (a [verb](https://github.com/verbose/verb) generator), please don't edit the readme directly. Any changes to the readme must be made in [.verb.md](.verb.md).)_
49 To generate the readme and API documentation with [verb](https://github.com/verbose/verb):
52 $ npm install -g verb verb-generate-readme && verb
57 Install dev dependencies:
60 $ npm install -d && npm test
67 * [github/jonschlinkert](https://github.com/jonschlinkert)
68 * [twitter/jonschlinkert](http://twitter.com/jonschlinkert)
72 Copyright © 2016, [Jon Schlinkert](https://github.com/jonschlinkert).
73 Released under the [MIT license](https://github.com/jonschlinkert/array-unique/blob/master/LICENSE).
77 _This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.1.28, on July 31, 2016._