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 }
SPONSORED In-app subscriptions are a pain to implement, hard to test, and full of edge cases. RevenueCat makes it straightforward and reliable so you can get back to building your app. Oh, and it's free if your app makes less than $10k/mo.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 8.0
Similar solutions…
- Check whether all items in an array match a condition
- NSRegularExpression: How to match regular expressions in strings
- Removing matching elements from a collection: removeAll(where:)
- Enabling and disabling elements in forms
- How set different widths for a UISegmentedControl's elements
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
