Are They The "same"? Codewars

HERE IS THE FULL QUESTION DESCRIPTION Given two arrays a and b write a function comp(a, b) (compSame(a, b) in Clojure) that checks whether the two arrays have the 'same' elements,

Solution 1:

The easiest possible way:

const comp = (a1, a2) => {
  if (!a1 || !a2 || a1.length !== a2.length) return false;
  return a1.map(x => x * x).sort().toString() === a2.sort().toString();
}