What are Swift's counterparts to JavaScript's Array.some() and Array.every()?

Question

Swift provides map, filter, reduce, ... for Array\'s, but I am not finding some (or any) or

Answer 1

Update:

Use allSatisfy (all) and contains(where:) (some).

Old answer:

Just use contains.

// check if ALL items are completed
// so it does not contain a single item which is not completed
!items.contains { !$0.completed }

// check if SOME item is completed
// so test if there is at least one item which is completed
items.contains { $0.completed }