30-seconds-of-code/javascript/snippets/union.md

title, type, tags, cover, dateModified

title	type	tags	cover	dateModified
Array union	snippet	array	yellow-white-mug-2	2020-10-22T20:24:44+03:00

Returns every element that exists in any of the two arrays at least once.

• Create a Set with all values of a and b and convert it to an array.

const union = (a, b) => Array.from(new Set([...a, ...b]));

union([1, 2, 3], [4, 3, 2]); // [1, 2, 3, 4]