From: Mayank Kohaley <mayank.kohaley@...>
Date: 2011-03-07T21:03:22+09:00
Subject: Re: basic programming question, help please

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The class method in Ruby is represented using self.<method name> or <class
name>.<method name>, A class method is used to modify the class variables(
which has the same value in every object of that class, as you have in your
program @@number_of_squares).

On Mon, Mar 7, 2011 at 5:09 PM, Kaye Ng <sbstn26@yahoo.com> wrote:

> class Square
>  def initialize
>    if defined?(@@number_of_squares)
>      @@number_of_squares = @@number_of_squares + 1
>    else
>      @@number_of_squares = 1
>    end
>  end
>  def self.count
>    @@number_of_squares
>  end
> end
>
> a = Square.new    #would return 1
> b = Square.new    #would return 2
> puts Square.count #2 would be printed on the screen
>
> --------------------------------------------------------------------
>
> My question is: why is the "self" necessary in "def self.count".
> I don't understand the logic behind it.
>
> (I know that I can also type "def Square.count" instead of "def
> self.count")
>
> Thanks guys!
>
> --
> Posted via http://www.ruby-forum.com/.
>
>

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