From: Aaron Patterson <aaron@...>
Date: 2009-11-19T02:15:51+09:00
Subject: Re: Exact (LISP-ish) calculations in Ruby?

On Wed, Nov 18, 2009 at 11:35:36PM +0900, Aldric Giacomoni wrote:
> Has anyone written a gem for exact calculations? The kind one would find
> on a LISP REPL, or when using your average HP scientific calculator?
> >> 3 / 4
> => 3/4
> >> 3 / 6
> => 1/2
> >> sqrt(2)
> => sqrt(2)
> >> sqrt(4)
> >> 2
> 
> I couldn't find anything on gemcutter or rubyforge, but maybe I missed
> it..
> I don't ask because I need it.. I ask because of an idealistic desire
> for exact calculations :)

How about the Rational class in stdlib?

  http://ruby-doc.org/stdlib/libdoc/rational/rdoc/index.html

-- 
Aaron Patterson
http://tenderlovemaking.com/