Class methods give you the mechanism to properly implement the object counter : Class Methods « Class « Ruby

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Ruby » Class » Class Methods

Class methods give you the mechanism to properly implement the object counter





class Square

  def initialize

    if defined?(@@number_of_squares)

      @@number_of_squares += 1

    else

      @@number_of_squares = 1

    end

  end



  def Square.count

    @@number_of_squares

  end

end



a = Square.new

puts Square.count

b = Square.new



puts Square.count

c = Square.new

puts Square.count

Related examples in the same category

1.	Creating Class Methods
2.	The area method is made available in all objects of class Square,
3.	Static class method

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