デザインパターンstrategy

strategyパターンです
ロジッククラスをポリモーフィズムで呼び出す

class Human

  

  attr_accessor :name, :height, :weight, :age

  

  def initialize(name, height, weight, age)

    @name = name

    @height = height

    @weight = weight

    @age = age

  end

end
class AgeComparator

  

  def compare(h1, h2)

    if(h1.age > h2.age)

      1

    elsif(h1.age == h2.age)

      0

    else

      -1

    end

  end

end
class MyClass

  

  def initialize(comparator)

    @comparator = comparator  

  end

  

  def compare(h1, h2)

    @comparator.compare(h1, h2)

  end

end
m = MyClass.new(AgeComparator.new)

h1 = Human.new("human1", 170, 45, 25)

h2 = Human.new("human2", 190, 85, 18)

puts m.compare(h1,h2).to_s