Checking all array elements match a condition: allSatisfy()
Swift version: 5.1
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 }LEARN SWIFTUI FOR FREE I have a massive, free SwiftUI video collection on YouTube teaching you how to build complete apps with SwiftUI – check it out!
Available from iOS 8.0
Similar solutions…
- Check whether all items in an array match a condition
- How to add drag and drop to your app
- How to list all cases in an enum using CaseIterable
- How do you create multi-dimensional arrays?
- What is a monad?
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
