NEW: Learn to build the incredible iOS 15 Weather app today! >>

A new Set data structure

Available from Swift 1.2

Paul Hudson      @twostraws

Swift 1.2 introduced a new Set type that works similarly to NSSet except with value semantics. Sets work similarly to arrays except they are not ordered and do not store any element more than once. For example:

var starships = Set<String>()
starships.insert("Serenity")
starships.insert("Enterprise")
starships.insert("Executor")
starships.insert("Serenity")
starships.insert("Serenity")

Even though that code tries to insert Serenity three times, it will only be stored in the set once.

Hacking with Swift is sponsored by Essential Developer

SPONSORED Learn the most up-to-date techniques and strategies for testing new and legacy Swift code in this free practical course for iOS devs who want to become complete Senior iOS Developers.

Learn more

Sponsor Hacking with Swift and reach the world's largest Swift community!

Other changes in Swift 1.2…

Download all Swift 1.2 changes as a playground Link to Swift 1.2 changes

Browse changes in all Swift versions

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.