How to list all classes that include a module?

Here's the code:

	module MyModule
	def self.included base
	included_classes << base unless included_classes.include?(base)
	end
	def self.included_classes
	@@included ||= []
	end
	end
	class ClassA
	include MyModule
	end
	class ClassB
	include MyModule
	end
	puts MyModule.included_classes

view raw module_mixed_in_classes.rb hosted with ❤ by GitHub