## mark a section (Learn more)

module MyNamespace def self.included(klass) klass.send :include, InstanceMethods klass.send :extend, ClassMethods end module InstanceMethods def foo 'bar from instance' end end module ClassMethods def foo 'bar from class' end end end class MyClass include MyNamespace end MyClass.foo # => "bar from class" MyClass.new.foo # => "bar from instance"

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