How to Extend a Ruby Module?

Modules in Ruby are like classes with a few important differences. One of the differences is, a module cannot inherit from another module using the same syntax as class inheritance. However, its pretty easy to inherit a module's method into another module, by just using the include ModuleToInclude syntax. Here's an example if you are looking for one:

	#!/usr/bin/ruby
	module BaseModule
	def cry
	p "wa wa wa waaa"
	end
	end
	module ExtendedModule
	include BaseModule
	#override the cry method from BaseModule
	def cry
	super
	p "aa waa aa waa"
	end
	end
	class MyClass
	include ExtendedModule
	end
	MyClass.new.cry #=> wa wa wa waaa aa waa aa waa

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