SALE: Save 50% on all my books and bundles >>

Learn what's new in Swift 4.1 with a playground

See the code, run the code, edit the code

Paul Hudson       @twostraws

Previously I wrote about the new features in Swift 4.1, but it's a lot more fun to see things in action and experiment yourself.

So, I just released an Xcode playground that demonstrates the new features introduced in Swift 4.1, complete with examples that I hope make them easy to understand and apply in your own work:

  • Synthesized Equatable and Hashable
  • Key decoding strategy in Codable
  • Conditional conformances
  • Recursive constraints on associated types
  • Build configuration import testing
  • Target environment testing
  • flatMap() is now (partly) compactMap()

The playground is available on GitHub, so I hope you'll try it for yourself: what's new in Swift 4.1?

I should add that the task of building this playground was made much easier thanks to previous work done by Ole Begemann.

Hacking with Swift is sponsored by Instabug

SPONSORED Catch bugs as soon as they happen and know exactly why a crash occurred by integrating Instabug's SDK in one minute. You will automatically receive device data, network logs, and reproduction steps with every bug and crash report.

Learn more and get started for free

Sponsor Hacking with Swift and reach the world's largest Swift community!

Cascable unleashes the power of your camera and unlocks powerful workflows for shooting, managing, and geotagging your photos.

BUY OUR BOOKS
Buy Pro Swift Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Coding Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift (Vapor Edition) Buy Advanced iOS Volume One Buy Advanced iOS Volume Two Buy Advanced iOS Volume Three Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Server-Side Swift (Kitura Edition) Buy Beyond Code

About the author

Paul Hudson is the creator of Hacking with Swift, the most comprehensive series of Swift books in the world. He's also the editor of Swift Developer News, the maintainer of the Swift Knowledge Base, and a speaker at Swift events around the world. If you're curious you can learn more here.

Was this page useful? Let us know!