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3. Reusable Singleton Patterns

3. Reusable Singleton Patterns

Singleton as a design pattern ensures that only one available instance of a particular class. It is not hard to get wrong if you’re not careful; that means it can be disastrous for others who need access to that very same instance. One downside to singletons is that they often overkill for classes that don’t need global access because you could just let any instance of the class call the required methods directly.

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