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union javascript Code Snippet in 2023

arraybeginner

Last Updated: 28 January 2023

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

  • Create a new 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]

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