A short digest for this week:

• Mutexes and closure capture in Swift very through overview how absence of threading language features hits Swift performance.
• Lenses in Swift another attempt to bring functional techniques to Swift.
• Another take on lenses in Swift (video, ~35 min)
• Modern Core Data a couple of tricks on Swift type system to improve Core Data experience (in case you still have to use it). It’s a bit funny to see it this talk on Realm page.
• Using Swift protocols to separate socket functionality is an example of how APIs can be separated to.
• TensorFlow on iOS sounds quite interesting for weekend hacking.
• SwiftTrace is a library for tracing method calls by class for Swift and Objective-C.