From: Lloyd Linklater <lloyd@2live4.com>
Date: 2008-10-21T22:05:45+09:00
Subject: Re: Ruby way to take some action only once in a loop?

You do not say if the "do once" code must rely on something obtained in 
the loop.  If you will excuse me for a simplistic question, if you are 
doing something like writing a header, why not do it before you even 
start the loop?  I dislike checking for a conditional every time a loop 
runs.  It sucks up CPU time unnecessarily.
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