Symmetric Difference

Giovanny Gongora

Returns the symmetric difference between two arrays, without filtering out duplicate values.

const symmetricDifference = (a: Array<number>, b: Array<number>) => {
  const sA: Set<number> = new Set(a),
    sB: Set<number> = new Set(b);
  return [...a.filter(x => !sB.has(x)), ...b.filter(x => !sA.has(x))];
};