From: Nate Wiger <nwiger@...>
Date: 2006-11-10T08:09:19+09:00
Subject: Re: Can't get eval to reference $1, $2, etc

Answered my own question (of course)... here's a way to do this by using 
sub instead of match/eval, which is much safer too:

     path = file.dup
     rules.each do |row|
       dest = row[1] || ''
       dest.gsub!('$','\\')  # allow $Perl or \Sed markers
       if path.sub!(%r{^#{row[0]}$}, dest)
         return path
       end
     end

-Nate