metaprogramming wrappers

configurable.rb

module ConfigurableMethods
	def configure_methods(methods_to_configure) # {:method_name => :method_override_name, ...}
		Class.new(self) do
			methods_to_configure.each do |method_name, method_override_name|
				class_exec do
					alias_method method_name, method_override_name
				end 
			end
		end
	end
end

class ActionDoer
	extend ConfigurableMethods

	def initialize
	end

	def do_action
		:default_action
	end

	def do_something_else
		:default_something_else
	end

	# would be nice if these could be private. arg 

	def do_action_differently
		:different_action
	end

	def do_action_differently_still
		:different_still_action
	end

	def do_something_else_differently
		:different_something_else
	end	
end

class DifferentActionDoer < ActionDoer
	alias_method :do_action, :do_action_differently
end

    >> a = ActionDoer.new
    => #<ActionDoer:0x000001051cef48>
    >> a.do_action
    => :default_action
    >> b = ActionDoer.configure_methods({:do_action => :do_action_differently}).new
    => #<#<Class:0x000001051d6f18>:0x000001051d6e00>
    >> b.do_action
    => :different_action
    >> b.do_something_else
    => :default_something_else