Apple’s Swift programming language: Cheat sheet

Apple’s Swift has far-reaching effects on all platforms, not just iOS, OS X, watchOS and tvOS. Learn why Swift matters, how to use the programming language and how it differs from Objective-C.

Objective-C has won the hearts of many developers. It started as a programming language that bundled object-oriented programming (OOP) with the likeness of the C programming language. Objective-C called NeXT and Apple home where it was the default programming language for NeXTSTEP, OS X and iOS.

In 2010, Apple started developing Swift, a new programming language that would rival Objective-C in a few areas–specifically, type safety, security, and better on-hardware performance. Swift is more than 2.6x faster than Objective-C and more than 8.4x faster than Python. Swift 1.0 was released in September 2014.

This article is also available as a download, Cheat sheet: Apple’s Swift programming language (free PDF).

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