TIL String#end_with? returns true if the argument is an empty string.

One minor improvement: You're referencing names.length 5 times. That's a smell it should be a variable, would be a great use of a case statement.

yeah man, gutted lol

This looks cool, but Array#length adds overhead for longer arrays
Can we store it somewhere and use that variable ?
I am not sure how much impact it does tho

Using the #sum method from Array is many, many times faster than using the alternative, inject or reduce.

this is the party pooper

can be done in linear time
but with more code "noise"

'Fixed, see comments above'

a little bit long line but good anyway!

funny but nice ........

wait wait? is it legal?!

Added.

very clean code. more ruby like.

I have added tests.