Swift Clips: First class functions

Swift Clips is a new series of shorter videos showcasing interesting and useful Swift tips and techniques. In this first episode we'll take a look at first class functions, which is a language feature that enables us to use functions in really powerful ways.

[MrGamer]

Amazing! This series is exactly what the iOS world needs. Short, concise, with good explanations and examples. Can't wait for the next to come. Thank you John!

[pasta]

Great first video! Looking forward to more :) Thanks for being such a helpful community member

[TheJhuerta]

Great video John! It's great to have access in video format to your advanced concepts. Thanks and congrats!

[TiagoAlves]

Been following John Sundell on his podcast for a while now and, as usual, this is very much like his other work: very informative and easy to follow. Good luck for this new adventure, John!

[MiKo-bhyw]

Like always, you made a great job !
Thanks John.

[johannbehrens]

Awesome first video, John! I really liked your example of the productManager, that can improve codebases quite a lot. :)

[yixe]

More advanced stuff please! Geared towards the future SwiftUI :D

[huyong]

Nice!! Good luck on your new journey 👍

[rixantos]

Wow passing `<` into the sorted function .... mind blown. Thats awesome. Thanks @johnsundell

[nicolasdegen]

Awesome video! But why did you name it `combine(_, with:)` rather than `apply(_, to:)`?

[mralirezaaaaa]

Hey John, It was a great video. I really like your coding style and how you do more work with lesser code!
I came up with a question about the last section of the video. Does the "combine(:with:)" method capture the value of the product property when the handler is called? or at the time when the "viewDidLoad()" is running? Can you explain it to me?

[MrSonuvru]

Correct me if I'm wrong, but in the resulting example shouldn't it be self.productmanager as it was in the original example. And if yes, won't that cause a retain cycle?

[joeygentry]

This is pretty good. One comment I have is that you lightly touched on it at the end but it is very bad to pass self.startCheckout into that combine as that would be a retain cycle.

[MrTalhakhan]

Finally after 10th viewing I was able to understand the logics... I am iOS dev with > 4 years experience :|

[dimiutube]

Wow! It is really mindblowing to see how elegant Swift code can look. It takes some time to get used to it, for a Java developer, code like array.sorted(by: <) looks not very understandable :-)