class HelloComputed
  class Contact
    attr_accessor :first_name, :last_name, :year_of_birth
  
    def initialize(attribute_map)
      @first_name = attribute_map[:first_name]
      @last_name = attribute_map[:last_name]
      @year_of_birth = attribute_map[:year_of_birth]
    end
  
    def name
      "#{last_name}, #{first_name}"
    end
    
    def age
      Time.now.year - year_of_birth.to_i
    rescue
      0
    end
  end
end