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Checking sequence elements match a condition

Available from Swift 4.2

Paul Hudson      @twostraws

SE-0207 provides a new allSatisfy() method that checks whether all items in a sequence pass a condition.

For example, if we had an array of exam results like this:

let scores = [85, 88, 95, 92]

We could decide whether a student passed their course by checking whether all their exam results were 85 or higher:

let passed = scores.allSatisfy { $0 >= 85 }
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Other changes in Swift 4.2…

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