mixins.rb

#thursday-08-2017
#@41studio
#Muhammad Yana Mulyana
#mixins in ruby

puts "Enter Name 1 "
name1 = gets.chomp.to_s
puts "Enter name 2 "
name2 = gets.chomp.to_s
puts "Enyer Name 3 "
name3 = gets.chomp.to_s

class Person
  include Comparable
  attr_reader :name

  def initialize(name)
    @name = name
  end
  def to_s
    "#{@name}"
  end
  def <=>(other)
    self.name <=> other.name
  end
end

p1 = Person.new(name1)
p2 = Person.new(name2)
p3 = Person.new(name3)

if p1 > p3
  puts "#{p1.name}'s name > #{p3.name}'s name"
end

puts "Sorted List :"
#puts p1
puts [p1, p2, p3].sort


#======== Instance Variable in mixins=========

module Observable
  def observers
    @observer_list ||= []
  end
  def add_observer(obj)
    observers << obj
  end
  def notify_observers
    observers.each{
      |o|
      o.update
    }
  end
end

module Test
  State = {}
  def state=(value)
    State[object_id] = value
  end
  def state
      State[object_id]
  end
end

class Client
  include Test
end

c1 = Client.new
c2 = Client.new
c1.state = 'cat'
c2.state = 'dog'
p c1.state
p c2.state

# at = [[[[1,[0,[3]]]]]]
# p at[0][0][0][0]