Array similarity

JavaScript, Array, Math · Oct 22, 2020

Returns an array of elements that appear in both arrays.

Use Array.prototype.includes() to determine values that are not part of values.
Use Array.prototype.filter() to remove them.

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

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

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