Swift version: 5.6
If you have a collection of objects and want to check that all of them match a specific condition, you should use the allSatisfy()
method.
For example, if we had an array of words and wanted to make sure they all start with the letter “S”, we could write code like this:
let sWords = ["Swift", "Seahorse", "Solar"]
let allMatch = sWords.allSatisfy { $0.hasPrefix("S") }
Alternatively, if we had an array of exam results like this:
let scores = [85, 88, 95, 92]
We could decide whether that student passed their course by checking whether all their exam results were 85 or higher:
let passed = scores.allSatisfy { $0 >= 85 }
BUILD THE ULTIMATE PORTFOLIO APP Most Swift tutorials help you solve one specific problem, but in my Ultimate Portfolio App series I show you how to get all the best practices into a single app: architecture, testing, performance, accessibility, localization, project organization, and so much more, all while building a SwiftUI app that works on iOS, macOS and watchOS.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 8.0
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
Link copied to your pasteboard.