Câu hỏi phỏng vấn Ruby
Câu hỏi

Are class variables inherited?

Câu trả lời

Yes, class variables are inherited in Ruby. Class variables in Ruby are prefixed with two at signs (@@) and are shared across the class and all of its subclasses. This means that if a class variable is changed in one subclass, the change will be reflected across all other subclasses and the superclass because they all reference the same variable[6].

However, it's important to note that this shared behavior can lead to unexpected results if not managed carefully. For example, if a subclass modifies a class variable, it will affect the superclass and all other subclasses that share this class variable. This is because class variables are effectively global within the context of the class hierarchy[6].

In contrast, instance variables in Ruby, which are prefixed with a single at sign (@)...

junior

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