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Sets in Swift - Collections in Swift - Beginning Swift 4.2 - raywenderlich.com

705 views · Published 12 October 2018 · 2:21 · Indexed 10 November 2026

Channel: Kodeco · 2018 · Education

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Learn how to use Sets in Swift to store an unordered collection of unique values.

View the complete course here:

https://www.raywenderlich.com/5994-programming-in-swift/lessons/1

Download the course materials here:

https://files.betamax.raywenderlich.com/attachments/videos/2088/590afc7c-0c80-4c7f-b8fc-4d75c52b3f30.zip

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raywenderlich.com is a website focused on developing high quality programming tutorials. Our goal is to take the coolest and most challenging topics and make them easy for everyone to learn – so we can all make amazing apps.

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About Swift:
From https://developer.apple.com/swift/

Swift is a powerful and intuitive programming language for macOS, iOS, watchOS and tvOS. Writing Swift code is interactive and fun, the syntax is concise yet expressive, and Swift includes modern features developers love. Swift code is safe by design, yet also produces software that runs lightning-fast.

Swift 4 builds on the strengths of Swift 3, delivering greater robustness and stability, providing source code compatibility with Swift 3, making improvements to the standard library, and adding features like smart key paths and serialization, all while shortening build times and reducing the size of app binaries.

In Swift Playgrounds you create small programs called “playgrounds” that instantly show the results of the code that you write. A single line of code can make amazing things happen. Interactive lessons teach key coding concepts, and additional challenges and templates encourage you to explore code in exciting new ways and to create something completely unique. There are even playgrounds that use Bluetooth to control robots, drones, and other hardware accessories. It’s easy to share your creations with friends, or record and post videos of your playgrounds in action.

Swift 4 was developed in the open at Swift.org, with source code, a bug tracker, mailing lists, and regular development builds available for everyone. This broad community of developers, both inside Apple as well as hundreds of outside contributors, work together to make Swift even more amazing. Swift already supports all Apple platforms as well as Linux, with community members actively working to port to even more platforms. We’re excited to see more ways in which Swift makes software safer and faster, while also making programming more fun.

Swift 3 set up the language for source-level stability and now Swift 4 delivers source compatibility as a feature moving forward. With Swift 4, you don’t have to modify any of your code to use the new version of the compiler. Instead you can start using the new Swift 4 compiler and migrate at your own pace, taking advantage of new Swift 4 features, one module at a time.

You can use the new Swift 4 compiler with three different modes:

Swift 3 mode is the default for existing code and will build source code that built with the Swift 3 compiler

Swift 4 mode enables you to use new features and performance optimizations of Swift 4, some of which may require migration, making it easier to migrate than the previous transition from Swift 2.2 to Swift 3.

Mixed mode allows you to take advantage of interoperability between binaries built with the same compiler. This helps developers who have projects that mix packages written with Swift 3 with packages written with Swift 4, as long as all packages are built using the Swift 4 compiler. This allows developers to gradually migrate specific portions of their code to Swift 4 over time.

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