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I saw this video a while back. Pretty good stuff. Any good protocol-oriented book suggestions?

Hmm... The Packt Publishing POP book is good and actually it looks like they just came out with the Swift 3 version! I only have the Swift 2 version but it really compares the POP method with OOP and shows it's strengths and pitfalls.

https://www.amazon.com/gp/aw/d/1787129942/ref=mp_s_a_1_1?ie=...

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