class BaseClass
  def hello
    :hello
  end
end

base_object = BaseClass.new
base_object.hello

class InheritClass < BaseClass
end

inherit_object = InheritClass.new
inherit_object.hello

def base_object.hello
  :singleton_method_hello
end

base_object.hello

module HelloModule
  def hello_from_module
    :hello_from_module
  end
end

class InheritClass
  include HelloModule
end

inherit_object = InheritClass.new
inherit_object.hello_from_module

module ByeModule
end

class MixinClass < BaseClass
  include HelloModule
  include ByeModule
end

class DuplicateMixinClass < BaseClass
  include HelloModule
  include ByeModule
  include HelloModule
end

inherit_object = InheritClass.new
inherit_object.net_exist_method

module HelloModule
  def hello
    :hello_module
  end
end

class GrandParentClass
  def hello
    :grand_parent_hello
  end
end

class ParentClass < GrandParentClass
  include HelloModule
end

class ChildClass < ParentClass
end

child = ChildClass.new
child.hello

module PrependModule
  def prepended_method
    :prepended_method
  end
end

class PrependedClass
  prepend PrependModule
end

prepended_obj = PrependedClass.new
prepended_obj.prepended_method

module IncludeModule
  def embeded_method
    :from_include_module
  end
end

module PrependModule
  def embeded_method
    :from_prepend_module
  end
end

class EmbeddedClass
  include IncludeModule
  prepend PrependModule
end

embeded_obj = EmbeddedClass.new
embeded_obj.embeded_method

class ReverseEmbeddedClass
  prepend PrependModule
  include IncludeModule
end

reverse_embeded_obj = ReverseEmbeddedClass.new
reverse_embeded_obj.embeded_method

class PrependedClass
  prepend PrependModule

  def embeded_method
    :prepended_class
  end
end

obj = PrependedClass.new
obj.embeded_method

module SuperCallModule
  def super_call_method
    puts "super_call_method"
    super
  end
end

class OverrideClass
  prepend SuperCallModule

  def super_call_method
    :overrode
  end
end

override_obj = OverrideClass.new
override_obj.super_call_method

module BeforeHelloFilter
  def hello
    "Hi! " + super
  end
end

class Hello
  prepend BeforeHelloFilter

  def hello
    "hello"
  end
end

Hello.new.hello

module FirstPrependModule
  def prepended_method
    :first_prepend_module
  end
end

module SecondPrependModule
  def prepended_method
    :second_prepend_method
  end
end

class PrependedClass
  prepend FirstPrependModule
  prepend SecondPrependModule
end

prepended_obj = PrependedClass.new
prepended_obj.prepended_method