Checking all array elements match a condition: allSatisfy()
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 }
SAVE 50% To celebrate WWDC23, all our books and bundles are half price, so you can take your Swift knowledge further without spending big! Get the Swift Power Pack to build your iOS career faster, get the Swift Platform Pack to builds apps for macOS, watchOS, and beyond, or get the Swift Plus Pack to learn advanced design patterns, testing skills, and more.
Available from iOS 8.0
Similar solutions…
- Check whether all items in an array match a condition
- Remove all instances of an object from an array
- NSRegularExpression: How to match regular expressions in strings
- Removing matching elements from a collection: removeAll(where:)
- Enabling and disabling elements in forms
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
