lodash.union

What is lodash.union?

The lodash.union package is a utility library that provides a method to create an array of unique values, in order, from all given arrays using SameValueZero for equality comparisons.

What are lodash.union's main functionalities?

Union of Arrays

This feature allows you to combine multiple arrays into one array with unique values. The example demonstrates combining two arrays [1, 2, 3] and [2, 3, 4] into a single array [1, 2, 3, 4] without duplicates.

const _ = require('lodash.union');
const array1 = [1, 2, 3];
const array2 = [2, 3, 4];
const unionArray = _.union(array1, array2);
console.log(unionArray); // Output: [1, 2, 3, 4]

Other packages similar to lodash.union

array-union

The array-union package provides similar functionality to lodash.union by creating an array of unique values from multiple arrays. It is simpler and more lightweight compared to lodash.union, making it a good choice for projects that need only this specific functionality.

underscore

The underscore package is a utility library similar to lodash, offering a wide range of functions for manipulating arrays, objects, and other data types. It includes a union function that provides similar functionality to lodash.union, but underscore is generally considered less performant and less feature-rich compared to lodash.

README

lodash.union v3.1.0

The modern build of lodash’s _.union exported as a Node.js/io.js module.

Installation

Using npm:

$ {sudo -H} npm i -g npm
$ npm i --save lodash.union

In Node.js/io.js:

var union = require('lodash.union');

See the documentation or package source for more details.