JS Snippets: Array: Difference between revisions
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m Стадий: 4 [Фаза:Авторизиране, Статус:Разработен]; Категория:JavaScript |
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Revision as of 11:50, 18 February 2023
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']
