Not a kata suggestion

A suggestion: Mark which things you disabled.

I first made something using parseInt and toString (obviously), and I wasn't surprised it didn't run, since you said "Oh, and I've disabled a few things."

However, the Kata only told me parseInt was disabled. So I did the parsing part and left the toString for the base conversion... and after doing that, the Kata told me "oh by the way, hehe, toString isn't allowed either" Well, tell me from the start!

I got frustrated that the description wasn't specific and I did this problem while I grumbled. It is not an issue, I think, since it is not breaking anything, but I felt like you were laughing at me :(

Really enjoyed this. Disable #to_s(base) for even more fun :-)