ruby_example.rb

gistfile1.rb

class Person

  def initialize(food = 0)
    @next_feeding_time = Time.now 
    feed(food) 
  end
  
  def hungry?
    @next_feeding_time < Time.now
  end
  
  def feed(food)
    if hungry?
      feed!(food)
    else
      puts "Not hungry"
    end
  end
  
  def feed!(food)
    @next_feeding_time = Time.now + food
    puts "I just ate, will be hungry again in #{food} seconds"
  end

end