@nhomble I agree with that in a production world, but Codewars is supposed to be a challenge. A place to practice your algorithm skills. Using a library kinda defeats the purpose.

This is a beginner kata.

Ya, i agree

Agreed, this is way too easy for kata 5 !

Agree. It's like a 6.5 kyu imo.

I also think this is approx. 7 kyu. Too easy for 5 kyu (solved this in Python).

then again, it is good to expose ourselves to the standard library and not reinvent the wheel all the time :D

Its idomatic ruby. Your solution has 11 lines and introduces extra (and complex!) method.