From: TAKAHASHI Masayoshi <maki@...>
Date: 2001-08-08T00:14:57+09:00
Subject: [ruby-talk:19294] Re: Perl/Python/Ruby common backend (Parrot, can Ruby play too?)

Tom Robinson <tom@alkali.spamfree.org> wrote:
> He might be talking about the way you can reopen and extend existing
> _built_in_ classes in Ruby, for example:
> 
> class Regexp
>   alias oldcomp =~
>   def =~ (astring)
>      match(astring)[1..9]
>   end
> end

And you can extend existing built-in classes' *instance*:

a = "foo"
def a.foo      ## add method 'foo' to String object
  print self+self
end
a.foo  #=> "foofoo"


TAKAHASHI 'Maki' Masayoshi     E-mail: maki@open-news.com