POP vs. OO: The differences

- [Instructor] We can model the same system…with protocols or with super classes.…Yet protocols provide more flexibility.…They are all about abstraction.…Protocols tell conforming types what…to do rather than how to accomplish…a certain functionality.…With a protocol oriented approach…we can create more granular designs…that are easier to maintain and enhance.…Let's summarize the main differences…between the protocol oriented design…and the object oriented way of designing…the software system.…

Subclasses may inherit unnecessary functionality…and data from the super class.…The internals of super classes get exposed…through inheritance which leads to unnecessary…complexity being shared with classes.…With protocol conformance we get loose coupling.…In a protocol oriented design the inheritance…hierarchies are replaced by protocol conformance.…The protocol oriented design promotes loose coupling…between types.…Unlike with sub classing types don't inherit…unnecessary functionality or data.…

They only receive the methods and properties…