From: Brian Candler <B.Candler@...>
Date: 2007-06-01T01:09:57+09:00
Subject: Re: Number formatting

On Fri, Jun 01, 2007 at 01:03:26AM +0900, Cory wrote:
> folks - can't quite figure this one out...
> 
> foo = 5
> bar = 10
> 
> 
> basically - when i go to print out the numbers - i want to format 'foo'
> with a leding zero so that it reads '05' and is aesthetically pleasing
> when compared to a double-digit number - such as bar: '10'.
> 
> 
> essentially looking to get:
> 
> 05
> 10
> 25
> 03

foo = 5
puts "%02d" % foo


--------------------------------------------------------------- String#%
     str % arg   => new_str
------------------------------------------------------------------------
     Format---Uses _str_ as a format specification, and returns the
     result of applying it to _arg_. If the format specification
     contains more than one substitution, then _arg_ must be an +Array+
     containing the values to be substituted. See +Kernel::sprintf+ for
     details of the format string.

        "%05d" % 123                       #=> "00123"
        "%-5s: %08x" % [ "ID", self.id ]   #=> "ID   : 200e14d6"