When to use delegation instead of inheritance? [closed]

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When you want to “copy”/Expose the base class’ API, you use inheritance.
When you only want to “copy” functionality, use delegation.

One example of this:
You want to create a Stack out of a List. Stack only has pop, push and peek. You shouldn’t use inheritance given that you don’t want push_back, push_front, removeAt, et al.-kind of functionality in a Stack.

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