Create a comparator that reverses the ordering produced by the given compareFn.
compareFn
[1, 2, 3].sort(byReverseOf(bySubtraction)); // [3, 2, 1] Copy
[1, 2, 3].sort(byReverseOf(bySubtraction)); // [3, 2, 1]
Create a comparator that reverses the ordering produced by the given
compareFn.