Swift version: 5.6
Swift 1.2 was an interim release that fixed some early confusions and annoyances in the language. Its changes weren't big, but they did help clean up and clarify Swift, and helped tide us all over until the release of Swift 2.
The important changes are:
if/let
rather than create a so-called "pyramid of doom" with nested statements.as!
and as?
to mark forced downcasting and optional downcasting respectively.NSString
, NSArray
and NSDictionary
.Set
data type was introduced to handle arrays where each value can appear only once.SAVE 50% To celebrate Black Friday, all our books and bundles are half price, so you can take your Swift knowledge further without spending big! Get the Swift Power Pack to build your iOS career faster, get the Swift Platform Pack to builds apps for macOS, watchOS, and beyond, or get the Swift Plus Pack to learn advanced design patterns, testing skills, and more.
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Available from iOS 7.0
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
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