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GGGiovanny 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))];
};