From: Matthew Kerwin <matthew@...>
Date: 2012-08-28T13:56:02+09:00
Subject: Re: A Ruby class is never closed

On 28 August 2012 14:18, Josh Rendek <josh@joshrendek.com> wrote:
> A really simple way to ensure a class doesn't get modified:
>
> class Foo
>   def Foo.method_added(name)
>     raise "This class is closed for modification"
>   end
> end
>
> class Foo
>   def testing
>   end
> end
>

Almost.

 class Foo
   def Foo.method_added(name)
     raise "This class is closed for modification"
   end
 end

 class Foo
   class << self
     undef method_added
     def method_added m
     end
   end
   def testing
   end
 end


-- 
  Matthew Kerwin, B.Sc (CompSci) (Hons)
  http://matthew.kerwin.net.au/
  ABN: 59-013-727-651

  "You'll never find a programming language that frees
  you from the burden of clarifying your ideas." - xkcd