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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