Lodash _.Intersection() Method

Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers etc.
The _.intersection() method is used to take the intersection of the one or more arrays. It is same as the intersection in set theory.

Syntax:

_.intersection([arrays])

Parameter: It takes an arrays as a parameter.

Return Value: It returns the array after intersection of arrays.

Note: Please install lodash module by using command npm install lodash before using the code given below.

Example 1: Taking Intersection of two arrays.

Javascript

// Requiring the lodash library
const _ = require("lodash");

// Original array
let array1 = [1, 2, 4, 3, 4, 4]
let array2 = [2, 4, 5, 6]

// Using _.intersection() method
let newArray = lodash.intersection(
                array1, array2);

// Printing original Array
console.log("original Array1: ", array1)
console.log("original Array2: ", array2)

// Printing the newArray
console.log("new Array: ", newArray)

Output:

Example 2: Taking intersection of more than two arrays.

Javascript

// Requiring the lodash library
const _ = require("lodash");

// Original array
let array1 = [1, 2, 4, 3, 4, 4]
let array2 = [2, 4, 5, 6]
let array3 = [2, 3, 5, 6]

// Using _.intersection() method
let newArray = _.intersection(
        array1, array2, array3);

// Printing original Array
console.log("original Array1: ", array1)
console.log("original Array2: ", array2)
console.log("original Array3: ", array3)

// Printing the newArray
console.log("new Array: ", newArray)

Output:

Example 3: Intersection of array with the empty array.

Javascript

// Requiring the lodash library
const _ = require("lodash");

// Original array
let array1 = [1, 2, 4, 3, 4, 4]
let array2 = []

// Using _.intersection() method
let newArray = lodash
    .intersection(array1, array2);

// Printing original Array
console.log("original Array1: ", array1)
console.log("original Array2: ", array2)

// Printing the newArray
console.log("new Array: ", newArray)

Output: