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Groups > comp.lang.ruby > #2713

Re: Copying parameters to singleton class

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Robert K. wrote in post #992088:
>
> or this way
>
> class Opportunities
>   class <<self
>     attr_reader :options
>   end
>
>   def self.using(opts)
>     Class.new(self).tap do |cl|
>       cl.instance_variable_set '@options', opts.freeze
>     end
>   end
> end
>
>

The using() method in your last solution can be simplified:

  def self.using(opts)
    Class.new(self) do
      @options = opts.freeze
    end
  end


And this bit in my last post:

    singleton.singleton_class.class_eval do  #<---SOLUTION***
      def options
        @options
      end
    end

is equivalent to:

    singleton.instance_eval do
      def options
        @options
      end
    end

-- 
Posted via http://www.ruby-forum.com/.

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Thread

Copying parameters to singleton class Lars Olsson <lasso@lassoweb.se> - 2011-04-11 02:19 -0700
  Re: Copying parameters to singleton class Robert Klemme <shortcutter@googlemail.com> - 2011-04-11 04:34 -0500
    Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-11 21:21 -0500
    Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-11 21:05 -0500
      Re: Copying parameters to singleton class Robert Klemme <shortcutter@googlemail.com> - 2011-04-12 01:53 -0500
        Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-12 13:31 -0500
    Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-12 19:08 -0500
  Re: Copying parameters to singleton class Jesús Gabriel y Galán <jgabrielygalan@gmail.com> - 2011-04-11 04:36 -0500
    Re: Copying parameters to singleton class Lars Olsson <lasso@lassoweb.se> - 2011-04-11 02:53 -0700
  Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-11 21:48 -0500
    Re: Copying parameters to singleton class Robert Klemme <shortcutter@googlemail.com> - 2011-04-12 02:00 -0500
      Re: Copying parameters to singleton class Lars Olsson <lasso@lassoweb.se> - 2011-04-12 01:25 -0700
        Re: Copying parameters to singleton class Robert Klemme <shortcutter@googlemail.com> - 2011-04-12 03:51 -0500
        Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-12 13:14 -0500
          Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-12 13:38 -0500
      Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-12 13:43 -0500
  Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-12 19:29 -0500
    Re: Copying parameters to singleton class Lars Olsson <lasso@lassoweb.se> - 2011-04-13 01:49 -0700
  Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-13 19:32 -0500
  Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-13 19:49 -0500
    Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-13 20:09 -0500
      Re: Copying parameters to singleton class Lars Olsson <lasso@lassoweb.se> - 2011-04-14 01:33 -0700
        Re: Copying parameters to singleton class 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-14 12:07 -0500

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