Ruby Method Hierarchy

code_example_4.rb

module Reviewer
  def name
    puts "Hi. This is Reviewer"
    super rescue nil
  end
end


module Manager
  def name
    puts "Hi. This is Manager"
    super rescue nil
  end
end

module Analyst
  def name
    puts "Hi. This is Analyst"
    super rescue nil
  end
end

class Employee

  # inherited method to class Employee
  def name
    puts "Hi. This is Employee "
    super rescue nil
  end
end

class Developer < Employee
  include Reviewer # including method into class Employee
  prepend Analyst # prepending method to class Employee

  # instance method to class Employee
  def name
    puts "Hi. This is Developer"
    super rescue nil
  end
end

developer_1 = Developer.new


def developer_1.name
  puts "Hi. This is developer_1"
  super
end

developer_1.extend(Manager)
developer_1.name

=> 'Hi. This is developer_1'
   'Hi. This is Manager'
   'Hi. This is Analyst'
   'Hi. This is Developer'
   'Hi. This is Reviewer'
   'Hi. This is Employee'


developer_1.class.ancestors
 => [Analyst, Developer, Reviewer, Employee, Object, Kernel, BasicObject]

  # [singleton, extend, prepend, class instance, include, super]