SALE ENDS TODAY: Save 50% on all Swift books and bundles! >>

Tuples

Tuples allow you to store several values together in a single value. That might sound like arrays, but tuples are different:

  1. You can’t add or remove items from a tuple; they are fixed in size.
  2. You can’t change the type of items in a tuple; they always have the same types they were created with.
  3. You can access items in a tuple using numerical positions or by naming them, but Swift won’t let you read numbers or names that don’t exist.

Tuples are created by placing multiple items into parentheses, like this:

var name = (first: "Taylor", last: "Swift")

You then access items using numerical positions starting from 0:

name.0

Or you can access items using their names:

name.first

Remember, you can change the values inside a tuple after you create it, but not the types of values. So, if you tried to change name to be (first: "Justin", age: 25) you would get an error.

SPONSORED Instabug helps you identify and resolve severe crashes quickly. You can retrace in-app events and know exactly which line of code caused the crash along with environment details, network logs, repro steps, and the session profiler. Ask more questions or keep users up-to-date with in-app replies straight from your dashboard. Instabug takes data privacy seriously, so no one sees your data but you! See more detailed features comparison and try Instabug's crash reporting SDK for free.

Save 50% on all books and bundles

The biggest ever Hacking with Swift sale is now on, letting you save 50% on all books and bundles. Learn something new with Swift and enjoy great savings while the sale lasts!

Click here to save 50% in our Black Friday sale!

BUY OUR BOOKS
Buy Pro Swift Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Coding Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift (Vapor Edition) Buy Advanced iOS Volume One Buy Advanced iOS Volume Two Buy Advanced iOS Volume Three Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Server-Side Swift (Kitura Edition) Buy Beyond Code

Was this page useful? Let us know!

Average rating: 4.7/5