From: Mike Fletcher <lemurific+rforum@...>
Date: 2006-05-25T03:34:05+09:00
Subject: Re: define_method for a single instance?

Jake McArthur wrote:
> I'm trying to define a method for a specific instance of a class
> rather than for every instance of the class. Basically, something
> like this:
> 
> class A
>    def add_wibble_method
>      # don't know what to do here
>    end
> end
> 
> foo = A.new
> bar = A.new
> foo.add_wibble_method
> foo.wibble # should work
> # bar.wibble should not work

module A
  def A.add_wibble_method( obj )
    class << obj
      define_method( :wibble ) { puts "Wibble!" }
    end
  end
end

k = Object.new
A.add_wibble_method( k )

k.wibble

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