March 2017
Intermediate to advanced
226 pages
5h 13m
English
Content preview from Swift StyleBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Returning Void
Prefer the Void typealias to () for types. It reads better. It also better matches return conventions in the Objective-C world. While this is not a particularly compelling reason for selecting a Swift style, it’s not a meaningless one either. Apple is divided on whether a void function returns () or Void. The Swift Programming Language book refers to both -> () and -> Void. The standard library returns -> Void and -> Swift.Void.
Some time back, an old-style Dev Forums post[48] clarified Apple’s stance at that time:
FWIW, we’ve recently decided to standardize on () -> Void (generally, () for parameters and Void for return types) across all of our documentation.
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Prefer Void for type names.
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Prefer () for argument signatures and ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.