[metalgearsolid]

To answer your question: objc.io

[oflannabhra]

I’ll tack on a couple sources to this:

http://pointfree.co - high quality content, emphasizing functional programming.

https://oleb.net/blog/ - blog of Ole Begemann, co author of Advanced Swift (good resource itself)

https://appventure.me - Benedikt Terhechte’s topical guides to Swift features

https://andybargh.com/blog/ Andy Bargh’s topical articles