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From: 7stud -- <bbxx789_05ss@yahoo.com>
Newsgroups: comp.lang.ruby
Subject: Re: Copying parameters to singleton class
Date: Wed, 13 Apr 2011 19:49:11 -0500
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.ruby:2804

Try something like this:

   def using(new_options)
      Class.new(self) do
        old_options = superclass.options
        @options = old_options.merge(new_options).select do |key|
          old_options.has_key?(key)
        end.freeze
      end
    end

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