method_pair.rb

module MethodPair

  def method_accessor(var, &block)
    define_method("set_#{var}",block)
	define_method(var) do 
		var_name = var.to_s.gsub(/\?/,'')
		insvar = instance_variable_get("@#{var_name}")
		unless insvar
			insvar = self.send("set_#{var}")
			instance_variable_set("@#{var_name}", insvar)
		end
		insvar
	end
  end

end