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I produce an app with ruby, and benefited from ruby tutorials. So, I meet this syntax (@@vars), and want to ask it. (I think it’s like a pointer in C or two dimensional array)
@@vars AND @vars
@varis an instance variable, whereas@@varis a class variable. See for example:http://railstips.org/blog/archives/2006/11/18/class-and-instance-variables-in-ruby/