Introduction
The expressions of the WWDC 2014 audience quickly changed from excitement and enthusiasm to looks of shock, horror, and awe. At this WWDC, after a succession of ever-surprising announcements, Apple ended the conference by announcing a completely new programming language designed entirely for Mac and iOS applications. This programming language is named Swift, which is what I have written about in this book.
The audience members’ looks of shock and horror were understandable in context. Most of the developers at that conference had spent the past six years mastering the previous, relatively obscure programming language used to develop apps called Objective-C. The people sitting in those seats were world-class experts in a programming ...
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