great solution! I like it, man!

This is surely clever, but probably shouldn't be used or marked as best practice. I'd have to performance test to be sure, but allocating an array on heap seems like it would be much slower than a branch with no array allocation. Maybe I'm wrong, in which case this would be a nice answer, but the bitwise and will always be better for both performance and readability.

hahaha really cool solution :D

I'm literally days in learning Ruby, and this simple solution has already taught me so much and made me think of so many more things that could be done with this concept, THANK YOU

wow, this is really clever. :)

Amazing and clever! Thanks!

Can someone point me to where I can read up more about
how this works?

Thank you very much for this kata.
It was a nice challenge, and after having MonkeyPatched like crazy, I eventually wrote something much simpler...