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I just started learning Ruby and I have been unable to find a good explanation on what is the difference between @@ and @ in terms of class variables. If anyone can provide a basic intuitive example, that would be really great. Also are they interchangeable?
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A variable prefixed with @@ is a class variable and one prefixed with @ is an instance variable. A great description can be found in this answer: https://stackoverflow.com/a/5890199/1181886
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@ before a variable name : instance variable (one per instance)
@@ before a variable name : static variable (one per class)
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