Union, Intersection, and Differences

script.js

'use strict'
console.clear()

const array1 = [1, 2, 3]
const array2 = [2, 3, 4]

const union = [...new Set([...array1, ...array2])]
const intersection = [...new Set(array1.filter(a1 => array2.find(a2 => a1 === a2)))]
const differences = [...new Set(array1.filter(a1 => !array2.find(a2 => a1 === a2)))]

console.log(union)
console.log(intersection)
console.log(differences)

union-intersection-and-differences.markdown

Union, Intersection, and Differences

Example on how to get Union, Intersection and Differences from two arrays using Set

A Pen by Vlad Bezden on CodePen.

License.