December 2015
Intermediate to advanced
400 pages
13h 3m
English
Content preview from Swift Programming: The Big Nerd Ranch Guide
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Swift Error Handling Philosophy
Swift is designed to encourage safe, easy-to-read code, and its error-handling system is no different.
Any function that could fail must be marked with throws.
This makes it obvious from the type of a function whether or not you need to handle potential errors.
Swift also requires you to mark all calls to functions that might fail with try.
This gives a great benefit to anyone reading Swift code.
If a function call is annotated with try, you know it is a potential source of errors that must be handled.
If a function call is not annotated with try, you know it will never emit errors that you need to handle.
If you have used C++ or Java, it is important to note the differences between Swift error handling ...
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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.