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  1. Write code
  2. Refactor code
  3. Pull members up, push members down

Pull members up, push members down

Last modified: 04 April 2024

The Pull Members Up refactoring allows you to move class members to a specified superclass. Push Members Down moves class members to a subclass.

Pull members up

To pull members up:

Before

After

cat.rb file 

class Cat < Mammal
  def move
    puts "move"
  end
  def speak
    puts "Meow"
  end
end

animal.rb file 

class Animal
def move
puts "move"
end
end

cat.rb file 

class Cat < Mammal
  def speak
    puts "Meow"
  end
end

Push members down

To push members down:

Before

After

animal.rb file 

class Animal
def breathe
puts "inhale and exhale"
end
def move
puts "move"
end
end

mammal.rb file 

class Mammal < Animal
end

animal.rb file 

class Animal
def move
puts "move"
end
end

mammal.rb file 

class Mammal < Animal
  def breathe
    puts "inhale and exhale"
  end
end

See also

Procedures