NEW: Subscribe to Hacking with Swift+ and accelerate your learning! >>

How to join an array of strings in a natural way

Swift version: 5.2

Paul Hudson    @twostraws   

Swift provides the ListFormatter class as a built-in way of joining lists of strings into a single string so that the last item has “and” before it, like a natural English string. So, rather than just getting “A, B, C” you actually get “A, B and C” – it’s much more suitable for user interfaces.

Here’s some example code:

let names = ["Ash", "Brock", "Misty"]
let joined1 = ListFormatter.localizedString(byJoining: names)
print(joined1)

That will print “Ash, Brock and Misty”. (No, there’s no way of asking it for the Oxford comma, so “Ash, Brock, and Misty” isn’t possible.)

If you want to join the strings without using the “and” at the end, you should just use the joined(separator:) method, like this:

let joined2 = names.joined(separator: ", ")
print(joined2)

That will print “Ash, Brock, Misty”.

Hacking with Swift is sponsored by Instabug

SPONSORED Are you tired of wasting time debugging your Swift app? Instabug’s SDK is here to help you minimize debugging time by providing you with complete device details, network logs, and reproduction steps with every bug report. All data is attached automatically, and it only takes a line of code to setup. Start your free trial now and get 3 months off exclusively for the Hacking with Swift Community.

Start your free trial!

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

Available from iOS 13.0

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!

Link copied to your pasteboard.