Mixins are a beautiful way to achieve something similar to multiple inheritance. It allows us to inherit or rather include methods defined in a module into a class. These methods can be included as either instance or class methods. The below example depicts this design.
module SampleModule def self.included(base) base.extend ClassMethods end module ClassMethods def method_static puts "This is a static method" end end def insta_method puts "This is an instance method" end end class SampleClass include SampleModule end sc = SampleClass.new sc.insta_method prints "This is an instance method" sc.class.method_static prints "This is a static method"