From: Marc Heiler <shevegen@...>
Date: 2009-04-22T19:52:18+09:00
Subject: Re: convert 7 in 07

counter = 1; sprintf("%02d", counter) # => "01"

In general, the ruby String class is much better than Int class - 
because Strings are like everywhere in ruby. I believe Matz once said 
that the String class was most work (or devoured most manhours when he 
worked on ruby initially)
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