I don't get the joke...

i wish import math had an average function

It does it remove i after the foreach loop and i is the lowest index min value there is cause its compared to the rest of the array.
It's actually a very efficient solution.

hash tables are slow compared to if statements when you only have 4 values in your domain

This is faster than using a hash table or iterating over the input vector 4 times. He's literally using a custom counter he made.

reported to the FBI, have fun in jail buddy

This code returns string either way I guess :D

could someone explain the concept behind this

why you add 1?

respect