Returns an array with only the unique values from the first array, by excluding all values from the second array. Uses strict equality for comparisons.
The arr-diff npm package is used to compute the difference between one or more arrays, returning an array that contains the values from the first array that are not present in the other arrays.
Basic array difference
This feature allows you to find the elements that are present in the first array but not in the subsequent arrays. The code sample demonstrates how to use arr-diff to filter out the numbers 2 and 4 from the array [1, 2, 3, 4, 5], resulting in [1, 3, 5].
[1, 2, 3, 4, 5].filter(arrDiff([2, 4]))Multiple array difference
This feature is used to find the difference between one array and multiple other arrays. The code sample shows how to use arr-diff to filter out the numbers 2, 3, 4, and 5 from the array [1, 2, 3, 4, 5], resulting in [1].
[1, 2, 3, 4, 5].filter(arrDiff([2, 3], [4, 5]))Lodash's difference function is similar to arr-diff. It creates an array of array values not included in the other given arrays using SameValueZero for equality comparisons. Lodash is a more extensive utility library that includes a wide range of functions for different purposes.
Underscore.js is a utility library that offers the _.difference function, which is similar to arr-diff's functionality. It returns the values from the first array that are not present in the other arrays. Underscore.js provides a more comprehensive set of utility functions beyond array manipulation.
Ramda is a functional programming library that includes a difference function, which behaves similarly to arr-diff. It focuses on a more functional programming approach and offers a suite of tools for this paradigm.
Returns an array with only the unique values from the first array, by excluding all values from the second array. Uses strict equality for comparisons.
Why another array difference lib? I wanted the fastest, correct implementation I could find.
npm i arr-diff --save
bower install arr-diff --save
npm test
var diff = require('arr-diff');
Return the difference between two arrays.
a {Array}b {Array}returns: {Array}var a = ['a', 'b', 'c', 'd'];
var b = ['b', 'c'];
console.log(difference(a, b))
//=> ['a', 'd']
Jon Schlinkert
Other projects that I maintain:
Copyright (c) 2014 Jon Schlinkert
Released under the MIT license
This file was generated by verb on December 02, 2014.
FAQs
Returns an array with only the unique values from the first array, by excluding all values from additional arrays using strict equality for comparisons.
The npm package arr-diff receives a total of 0 weekly downloads. As such, arr-diff popularity was classified as not popular.
We found that arr-diff demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 3 open source maintainers collaborating on the project.
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