From: Mark Probert <probertm@...>
Date: 2004-10-01T11:10:00+09:00
Subject: Re: RPN Fun

James Edward Gray II <james@grayproductions.net> wrote:
>
>   If you're one of those people who has fond memories of HP's RPN 
> calculators, you might want to play with this code a little.  Just 
> thought I would share.
> 

Thank you :-)

Also, if you are interested in RPN, I have ported a FORTH to Ruby (just 
because ;-)).  You can find it at

 http://raa.ruby-lang.org/project/ratlast/

All the RPN features you could want, plus more (ie Full Ruby).

Trivial e.g.

  require 'Atlast'

  t = Atlast.new
  t.eval(": sqr  ( n -- n*n )  dup * ;")
  n = t.run("4 sqr .")

  puts "4*4 = #{n}"

Regards,

-- 
-mark.  (probertm @ acm dot org)