From: Ned Konz <ned@...>
Date: 2002-07-25T14:15:13+09:00
Subject: Re: A Code Challenge

On Wednesday 24 July 2002 08:56 pm, Tom Sawyer wrote:
> Problem:
>
>   given a proc p and an object o with method x, such that the arity
> of x and p are the same, dynamically append p into x.
>
> statically you have this:
>
>   class O
>     def x(a)
>       puts "do something with #{a}"
>     end
>   end
>   o = O.new
>
> then given:
>
>   p = Proc.new { |a| puts "do something else with #{a}" }
>
> the goal is to dynamically modify instance o such that it were AS
> IF it were an instantiation of:
>
>   class O
>     def x(a)
>       puts "do something with #{a}"
>       puts "do something else with #{a}"
>     end
>   end
>
> ~transami

You mean like this?

class O
  def x(a)
    puts "do something with #{a}"
  end
end

o = O.new

$p = Proc.new { |a| puts "do something else with #{a}" }

def o.x(a)
  super
  $p.call(a)
end

o.x('abc')

-- 
Ned Konz
http://bike-nomad.com
GPG key ID: BEEA7EFE