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Mastering Swift 4 - Fourth Edition by Jon Hoffman

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What is Swift?

Swift is a programming language that was introduced, by Apple, at the World Wide Developers Conference (WWDC) in 2014. Swift was arguably the most significant announcement at WWDC 2014 and very few people, including Apple insiders, were aware of the project's existence prior to it being announced.

It was amazing, even by Apple's standards, that they could keep Swift a secret for as long as they did and that no one suspected they were going to announce a new development language. At WWDC 2015, Apple made another big splash when they announced Swift 2. Swift 2 was a major enhancement to the Swift language. During that conference, Chris Lattner said that a lot of the enhancements were based on direct feedback that Apple received ...

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