supermap.rb

module Enumerable
	class MapEnumerator
		instance_methods.each {|m| undef_method m unless m =~ /__/}

		def initialize(enum)
			@enum = enum
		end

		def method_missing(name, *args)
			@enum.map {|e| e.send name, *args}
		end
	end
end

class Array
	alias_method :__map__, :map

	def map(&block)
		if block_given?
			send :__map__, &block 
		else
			Enumerable::MapEnumerator.new self
		end
	end
end