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I am looking for a nice reading for students about using delegates instead of inheritance.

By “delegates,” I mean where one might be tempted to provide an abstract class where subclasses fill in the blanks to customize a process, instead the superclass accepts an interface/protocol that a delegate object implements (à la UIKit).

Just the basics. Simple is good.

Anyone know of, say, a blog post or chapter from a book that covers this nicely?