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What’s new in Swift 4
An Xcode playground showcasing the new features in Swift 4.0. As seen in the What’s New in Swift session at WWDC 2017.
Written by Ole Begemann, May–September 2017.
See also: my What’s new in Swift 4.2 playground from 2018.
The playground requires Swift 4. Xcode 9 includes Swift 4 by default.
You can also run it in Xcode 8.3, but you need to install the latest Swift 4.0 snapshot from swift.org (don’t worry, it’s easy).
[Screenshot of the playground in Xcode 8.3][Playground screenshot]