What are the differences between various C++ design patterns?

Can you explain the differences between the Singleton and Factory design patterns in C++?

Sure! The Singleton pattern ensures a class has only one instance and provides a global point of access to it. In contrast, the Factory pattern defines an interface for creating objects but allows subclasses to alter the type of objects that will be created.

What about the Observer pattern? How does it compare to the others?

The Observer pattern is used for a one-to-many dependency between objects, so when one object changes state, all its dependents are notified. Unlike Singleton and Factory, which focus on object creation and instance control, Observer is more about communication between objects.

Can you give me an example of when to use the Strategy pattern?

Absolutely! The Strategy pattern is useful when you want to define a family of algorithms, encapsulate each one, and make them interchangeable. For instance, if you have different sorting algorithms, you can use the Strategy pattern to switch between them at runtime.

Are there any design patterns that are specific to C++?

Yes, C++ has some unique patterns like the RAII (Resource Acquisition Is Initialization) pattern, which is crucial for resource management, especially with memory.