From: Maurizio De Santis <desantis.maurizio@...>
Date: 2010-08-01T21:56:03+09:00
Subject: Re: what is the correct way to extend native methods?

David A. Black wrote:
> 
> It's one underlying method (C function) with two Ruby names. If you
> redefine one of the Ruby names you break the binding between that name
> and the underlying method, and if you add an alias then there's a third
> name. Each binding is separate; they don't automatically change
> together.
> 

uhhh I think I've understood: In order to do what I want to do, I should 
implement something like this:


class Array

  def slice_with_regexp(*args)
    return self.select{ |val| val =~ args[0] } if args.size == 1 and
args[0].is_a?(Regexp)
    # code that executes C function called by [] and slice
  end

  alias_method :slice_with_regexp, :slice
  alias_method :slice_with_regexp, :[]

end


that is stupid 'cause breaks Array.slice performances.

Right?

Thanks a lot David!
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