From: James Edward Gray II <james@...>
Date: 2007-10-09T21:04:38+09:00
Subject: Fwd: Quiz 67 Solution

Begin forwarded message:

> From: "Sudheer Koganti" <sbkoganti@gmail.com>
> Date: October 9, 2007 12:16:13 AM CDT
> To: submission@rubyquiz.com
> Subject: Quiz 67 Solution
>
> Hi,
>
> I spent 3 days figuring out this solution.  Though this quiz is way  
> past, I'd like to send this solution anyway.
>
> class Module
>    def attribute(arg, &block)
>       a = arg.is_a?(Hash) ? arg.keys.first : arg
>       p = proc do |me|
>          if me.instance_variable_defined?("@#{a}") then
>             me.instance_variable_get("@#{a}")
>          elsif arg.is_a?(Hash)
>             arg.values.first
>          elsif block_given?
>             me.instance_eval(&block)
>          else nil end
>       end
>       define_method("#{a}")  { p.call(self) }
>       define_method("#{a}?") { p.call (self) ? true : false }
>       define_method("#{a}=") { |val| instance_variable_set("@#{a}",  
> val) }
>    end
> end
>
>
> Thanks
> Sudheer
>
>