How do you combine observer pattern to create a book-lending system that allows you to borrow a book.
Stephanie
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How to use observer pattern.
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Discussion (4)
It really depends on the context of your problem. Can you provide us with more information, about that ?
To develop a Service for a book lending platform.
Is there a specific reason you need to use those two patterns?
Was given a task to develop a Service for a book lending platform.