Returns an array with only the unique values from the first array, by excluding all values from additional arrays using strict equality for comparisons.
Install
Install with npm:
$ npm install --save arr-diff
Install with yarn:
Install with bower
$ bower install arr-diff --save
Usage
Returns the difference between the first array and additional arrays.
var diff = require('arr-diff');
var a = ['a', 'b', 'c', 'd'];
var b = ['b', 'c'];
console.log(diff(a, b))
//=> ['a', 'd']
Benchmarks
This library versus array-differ, on April 14, 2017:
Benchmarking: (4 of 4)
· long-dupes
· long
· med
· short
# benchmark/fixtures/long-dupes.js (100804 bytes)
arr-diff-3.0.0 x 822 ops/sec ±0.67% (86 runs sampled)
arr-diff-4.0.0 x 2,141 ops/sec ±0.42% (89 runs sampled)
array-differ x 708 ops/sec ±0.70% (89 runs sampled)
fastest is arr-diff-4.0.0
# benchmark/fixtures/long.js (94529 bytes)
arr-diff-3.0.0 x 882 ops/sec ±0.60% (87 runs sampled)
arr-diff-4.0.0 x 2,329 ops/sec ±0.97% (83 runs sampled)
array-differ x 769 ops/sec ±0.61% (90 runs sampled)
fastest is arr-diff-4.0.0
# benchmark/fixtures/med.js (708 bytes)
arr-diff-3.0.0 x 856,150 ops/sec ±0.42% (89 runs sampled)
arr-diff-4.0.0 x 4,665,249 ops/sec ±1.06% (89 runs sampled)
array-differ x 653,888 ops/sec ±1.02% (86 runs sampled)
fastest is arr-diff-4.0.0
# benchmark/fixtures/short.js (60 bytes)
arr-diff-3.0.0 x 3,078,467 ops/sec ±0.77% (93 runs sampled)
arr-diff-4.0.0 x 9,213,296 ops/sec ±0.65% (89 runs sampled)
array-differ x 1,337,051 ops/sec ±0.91% (92 runs sampled)
fastest is arr-diff-4.0.0
About
Related projects
Contributing
Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
Contributors
Building docs
_(This project's readme.md is generated by verb, please don't edit the readme directly. Any changes to the readme must be made in the .verb.md readme template.)_
To generate the readme, run the following command:
$ 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:
$ npm install && npm test
Author
Jon Schlinkert
License
Copyright © 2017, Jon Schlinkert. Released under the [MIT License](LICENSE).
This file was generated by verb-generate-readme, v0.5.0, on April 14, 2017.