arr-union (3.1.0)
Published 2026-02-24 13:52:55 +00:00 by atheaadmin
Installation
registry=npm install arr-union@3.1.0"arr-union": "3.1.0"About this package
arr-union 
Combines a list of arrays, returning a single array with unique values, using strict equality for comparisons.
Install
Install with npm:
$ npm i arr-union --save
Benchmarks
This library is 10-20 times faster and more performant than array-union.
See the benchmarks.
#1: five-arrays
array-union x 511,121 ops/sec ±0.80% (96 runs sampled)
arr-union x 5,716,039 ops/sec ±0.86% (93 runs sampled)
#2: ten-arrays
array-union x 245,196 ops/sec ±0.69% (94 runs sampled)
arr-union x 1,850,786 ops/sec ±0.84% (97 runs sampled)
#3: two-arrays
array-union x 563,869 ops/sec ±0.97% (94 runs sampled)
arr-union x 9,602,852 ops/sec ±0.87% (92 runs sampled)
Usage
var union = require('arr-union');
union(['a'], ['b', 'c'], ['d', 'e', 'f']);
//=> ['a', 'b', 'c', 'd', 'e', 'f']
Returns only unique elements:
union(['a', 'a'], ['b', 'c']);
//=> ['a', 'b', 'c']
Related projects
- arr-diff: Returns an array with only the unique values from the first array, by excluding all… more | homepage
- arr-filter: Faster alternative to javascript's native filter method. | homepage
- arr-flatten: Recursively flatten an array or arrays. This is the fastest implementation of array flatten. | homepage
- arr-map: Faster, node.js focused alternative to JavaScript's native array map. | homepage
- arr-pluck: Retrieves the value of a specified property from all elements in the collection. | homepage
- arr-reduce: Fast array reduce that also loops over sparse elements. | homepage
- array-unique: Return an array free of duplicate values. Fastest ES5 implementation. | homepage
Contributing
Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
Building docs
Generate readme and API documentation with verb:
$ npm i verb && npm run docs
Or, if verb is installed globally:
$ verb
Running tests
Install dev dependencies:
$ npm i -d && npm test
Author
Jon Schlinkert
License
Copyright © 2016 Jon Schlinkert Released under the MIT license.
This file was generated by verb, v0.9.0, on February 23, 2016.
Dependencies
Development Dependencies
| ID | Version |
|---|---|
| ansi-bold | ^0.1.1 |
| array-union | ^1.0.1 |
| array-unique | ^0.2.1 |
| benchmarked | ^0.1.4 |
| gulp-format-md | ^0.1.7 |
| minimist | ^1.1.1 |
| mocha | * |
| should | * |
Keywords
add
append
array
arrays
combine
concat
extend
union
uniq
unique
util
utility
utils