30-seconds-of-code/snippets/similarity.md

similarity

Returns an array of elements that appear in both arrays.

Use Array.filter() to remove values that are not part of values, determined using Array.includes().

const similarity = (arr, values) => arr.filter(v => values.includes(v));

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