[swift-users] Comparing POP to OOP

Jon Hoffman hoffman.jon at gmail.com
Sat Mar 5 16:09:49 CST 2016

> On Feb 25, 2016, at 7:29 PM, Dave Abrahams via swift-users <swift-users at swift.org> wrote:
> on Sun Feb 14 2016, Jon Hoffman <swift-users-AT-swift.org> wrote:
>> Numerous tutorials that I have seen take a very Object-Oriented
>> approach to the protocol-oriented programming (POP) paradigm.  By this
>> statement I mean that they tell us that with POP we should begin our
>> design with the protocol rather than with the superclass as we did
>> with OOP however the protocol design tends to mirror the superclass
>> design of OOP.  They also tell us that we should use extensions to add
>> common functionality to types that conform to a protocol as we did
>> with superclasses in OOP.  While protocols and protocol extensions are
>> arguably two of the most important concepts of POP these tutorials
>> seem to be missing some other very important concepts.
>> In this post I would like to compare Protocol-Oriented design to
>> Object-Oriented design to highlight some of the conceptual
>> differences.  You can view the blog post here:
>> http://masteringswift.blogspot.com/2016/02/pop-and-oop.html
>> <http://masteringswift.blogspot.com/2016/02/pop-and-oop.html>
> While I agree that simply translating classes into protocols misses the
> point, it seems as though your post still only deals with the
> dynamically-polymorphic half of the protocol world.  I don't see any
> generics in there at all, for example.  If you're really going for a
> comprehensive view of POP, you need to get into that stuff too.
> -- 
> -Dave

You are correct that POP is about so much more than what was covered in this introductory post.  This post was written to be an introduction to be Protocol-Oriented programming with a comparison to Object-Oriented programming.

POP was introduced to the World less than a year ago.  Over the next few years, as Swift changes and matures; the Protocol-Oriented programming paradigm will mature with it.  Hopefully I can continue to write about these changes as well.

My book does cover POP and the technologies that make up POP more extensively than this post does however I plan on writing several more posts, as time allows with my day job, to expand not only on this post but also on the material in my book. 


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