From: "baumanj@..." <baumanj@...>
Date: 2006-04-03T20:38:55+09:00
Subject: Re: Ruby way to sum digits

Just one more way, since I haven't seen a solution that takes advantage
of the no-parameter inject call:

1234.to_s.split('').map {|c| c.to_i }.inject {|i,j| i+j }
=> 10