From: James Edward Gray II <james@...>
Date: 2006-02-09T12:47:34+09:00
Subject: Re: Formatting Numbers

On Feb 8, 2006, at 7:43 PM, HH wrote:

> This has got to be simple but I checked the PickAxe and Google to  
> no avail.
> My guess is that I'm looking for it in terms that don't make sense.
>
> Anyway...
>
> I have a fixnum:
>
> a = 1000
>
> I would like to output it with a comma, such as "1,000". Is there a
> formatting class or something I can use something along these lines
> (thinking from my Java background):
>
> Formatter f = Formatter.new("N0")
> puts f(a)
>
> Any help appreciated.

def commify( str )
   str.reverse.gsub(/(\d\d\d)(?=\d)(?!\d*\.)/,'\1,').reverse
end

Handles floats too.

James Edward Gray II