From: Xavier Noria <fxn@...>
Date: 2003-08-06T00:48:51+09:00
Subject: Re: format number with comma separators?

On Tuesday 05 August 2003 17:32, Xavier Noria wrote:

> Yet another regex solution:
>
>     % ruby -e 'puts "456778904".gsub(/(.)(?=.{3}+$)/, %q(\1,))'
>     456,778,904
>
> -- fxn
>
>     .gsub(/(\d)(?=\d{3}+$)/, '\1,')

That spurious line at the end uses a regex that works for negative 
numbers as well.

-- fxn