Check whether all items in an array match a condition
Swift version: 5.6
Swift has built-in way of checking whether all items in an array match a condition: the allSatisfy() method. Give this thing a condition to check, and it will apply that condition on all items until it finds one that fails, at which point it will return false. If it reaches the end of the array and all have passed the condition, it will return true.
For example, you can check whether all items in an array of numbers are under 10:
[1, 2, 3, 4, 5].allSatisfy { $0 < 10 }TAKE YOUR SKILLS TO THE NEXT LEVEL If you like Hacking with Swift, you'll love Hacking with Swift+ – it's my premium service where you can learn advanced Swift and SwiftUI, functional programming, algorithms, and more. Plus it comes with stacks of benefits, including monthly live streams, downloadable projects, a 20% discount on all books, and free gifts!
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Available from iOS 8.0
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This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
