Class variable as condition variable : Class Defintion « Class « Ruby

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Ruby » Class » Class Defintion

Class variable as condition variable





class House



  @@current_temp = 70



  attr_accessor :atomic_number



  def House.current_temp=(x)

    @@current_temp = x

  end



  def House.current_temp

    @@current_temp

  end



  def hot?

    @@current_temp >= @melting

  end



  def initialize(atnum, melt)

    @atomic_number = atnum

    @melting = melt

  end



end







app = House.new(13, 1236)

app2 = House.new(29, 1982)

app3 = House.new(79, 1948)



House.current_temp = 1600



puts app.hot?        # true

puts app2.hot?          # false

puts app3.hot?            # false



House.current_temp = 2100



puts app.hot?        # true

puts app2.hot?          # true

puts app3.hot?            # true

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