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Returns every element that exists in any of the two arrays at least once.
- Create a
Setwith all values ofaandband 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]Recommended snippets & collections
JavaScript Array Tricks
Snippet collection
Learn a handful of awesome tips and tricks that you can leverage in your code to make array manipulation a breeze.
Mapped array union
JavaScript, Array
Returns every element that exists in any of the two arrays at least once, after applying the provided function to each array element of both.
Array union based on function
JavaScript, Array
Returns every element that exists in any of the two arrays at least once, using a provided comparator function.
Partition array in two
JavaScript, Array
Groups the elements into two arrays, depending on the provided function's truthiness for each element.