Appendix A

A Swift Introduction to Swift

Until recently, writing an iPhone or iPad application meant working with Objective-C. Because of its unusual (some would say elegant) syntax, Objective-C is one of the most polarizing of programming languages—you either love it or you hate it. At the World Wide Developer Conference in 2014, Apple changed all that by unveiling an alternative—a new language called Swift. Swift’s syntax is designed to be easily recognizable to programmers who are used to some of the more popular object-oriented programming languages like C++ and Java, therefore making it easier for them to start writing applications for iOS (and for Macs, since Swift is also fully supported as a development language on OS X). This appendix ...

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