From: Matthew Moss <matthew.moss.coder@...>
Date: 2006-09-07T13:11:40+09:00
Subject: Re: [QUIZ] Happy Numbers (#93)

>       return false if (self ^ 4).zero?
>       return true  if (self ^ 1).zero?

Okay, these two lines were silly; replace with:

return false if self == 4
return true if self == 1