Swift

First-Class Functions in Swift

In Swift, functions are first-class citizens letting you pass them as properties or return them from other functions just like any other object or value. In this article @johnsundell looks at some of the different ways we can use this to our advantage in Swift.
swiftbysundell.com

Userful Optional Extensions

Optionals have been a major asset to the Swift language, improving code safety by forcing us to handle edge cases that we may have previously ignored. Although powerful, the API for Swift optionals is rather limited though and many developers have resorted to writing extensions to add additional behaviour. @terhechte has brought together a list of some of the most useful.
appventure.me

Conditional Conformance in the Standard Library

Swift 4.1 is looming in the not-too-distant future and along with it comes a nice new language feature – conditional conformance – a feature that unlocks some nice new capabilities in the Swift language. @airspeedswift provides all the details and with snapshot builds availabe, you can even play with it today!
swift.org

State of String: ABI, Performance, Ergonomics, and You!

Looking further into the future, @ilseman has written an interesting summary of the state of play for Strings in Swift 5. Although the work is primarily focus is the stabilization of the Strings ABI, much of the article discusses potential changes to address obvious short-falls in the String API. It’s an interesting read and hints at some useful additions in the future.
github.com