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Swift Pocket Reference : Programming for Ios and OS X: Covers Swift 2.1 (Paperback) (Anthony Gray)
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Get quick answers for developing and debugging applications with Swift, Apple’s multi-paradigm programming language. The second edition of this pocket reference provides the perfect on-the-job tool for learning Swift’s modern language features, including type safety, generics, type inference, closures, tuples, automatic memory management, and support for Unicode.
Designed to work with Cocoa and Cocoa Touch, Swift can be used in tandem with Objective-C, and either of these languages can call APIs implemented in the other. Though still evolving, Swift is the clear choice for iOS and OS X software development.