NEW: Start my new Ultimate Portfolio App course with a free Hacking with Swift+ trial! >>

What is destructuring?

Swift version: 5.2

Paul Hudson    @twostraws   

Destructuring is the practice of pulling a tuple apart into multiple values in a single assignment. For example, consider a trivial function that accepts names in the format “FirstName LastName” and returns a tuple containing the first and last names separated:

func splitName(_ name: String) -> (String, String) {
    let parts = name.components(separatedBy: " ")
    return (parts[0], parts[1])
}

If you want to call that using destructuring, just use two values for your assignment when calling it, like this:

let (first, last) = splitName("Taylor Swift")

That creates first and last constants out of the two returned items in the tuple, and you can then use them as normal:

print(first)
print(last)
Hacking with Swift is sponsored by Fernando Olivares

SPONSORED Would you describe yourself as knowledgeable, but struggling when you have to come up with your own code? Fernando Olivares has a new book containing iOS rules you can immediately apply to your coding habits to see dramatic improvements, while also teaching applied programming fundamentals seen in refactored code from published apps.

Try the book!

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

Available from iOS 8.0 – learn more in my book Pro Swift

Similar solutions…

About the Swift Knowledge Base

This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.

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: 3.0/5

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.