JS Snippets: Array
From WikiMLT
Intersect two Arrays
const arr1 = [1, 2, 3, 4];
const arr2 = [1, 2, 5, 6];
const intersection = arr1.filter(value => arr2.includes(value));
console.log(intersection);
(2) [1, 2]
Reference: How to find the intersection of arrays in JavaScript by Reactgo
Get an Array elements by an Array of indexes
const arr1 = ['a', 'b', 'c', 'd', 'e', 'f'];
const arr2 = [1, 3, 4, 0];
const intersection = arr1.filter((value, index) => arr2.includes(index)); // arr2.includes(index) ? true : false
console.log(intersection);
(3) ['a', 'b', 'd', 'e']
