Mastering Swift 3 1st Edition, Kindle Edition
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- Length: 392 pages
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The only reason I'm giving it three stars is because there's a chapter called "When not to use generics" which is potentially misleading.
It should have explained the tradeoffs between dynamic and static dispatch (code size, speed, existential containers, etc) instead of labeling them as "right" and "wrong". I understand this topic was probably considered to be outside the scope of the book, but in that case it should have been more careful before advising the reader against something that's perfectly valid under the right circumstances.
If anyone is interested, there's a video from Apple called "Understanding Swift Performance" which addresses the subject (minute 42 and forward), watch it.
The book gives a good introduction to Swift in it’s most current iteration. It explains critical concepts of the language like optionals, generics and closures without over-complicating them. Being a book specifically on Swift 3 it points out differences between earlier version of the language and this most current one. Jon’s style of writing is easy to follow and understand.
I especially liked that the book does a detour and suggest how a few common design patterns could sensibly be adopted in Swift 3. For programmers coming from other languages this can be valuable as it shows familiar functionality done with a new set of tools.
Although Swift 3 does not contain any language level concurrency Mastering Swift 3 explains existing technologies to deal with asynchronous problems. This includes an introduction to Grand Central Dispatch and Operation queues.
I think the book does a good job of giving the reader an intoduction to Swift and to real world programming in this language.