Lol what? He used sort which is a built in function, also his solution is O(nlogn) when the optimal solution is O(n)

so use the reduce is optimial because O(n) ?

nice try

This is O(n logn). The optimal is O(n).

I basically created an extra variable for no reason. -______-
Great Job.

This is what I consider clever, not using the built in function.

same

Didn't think of that. Good Point! Also like your solution using the spread operator.

Mutating the parameter ... ouch!