From: "Peña, Botp" <botp@...>
Date: 2007-12-14T12:22:17+09:00
Subject: Re: Getting method parameters in specified order

From: Chintana Wilamuna [mailto:chintanaw@gmail.com] 
# Sent: Thursday, December 13, 2007 11:40 PM
# To: ruby-talk ML
# Subject: Re: Getting method parameters in specified order
# 
# On Dec 13, 2007 6:36 PM, Bernardo Monteiro Rufino 
# <bermonruf@gmail.com> wrote:
# 
# > I think we cant do more than this:
# >
# > irb(main):001:0> def test(a, b, c)
# > irb(main):002:1> end
# > => nil
# > irb(main):003:0> method(:test).arity
# > => 3

not part of ruby itself, but try looking at ruby2ruby

kind regards -botp