Is this possible to check all value in swift array is true instead of looping one by one?

Question

I just whether is this possible to have an array of object MyObject, and the MyObject got a variable called isTrue, except from looping the whole array to check whether all the object in that array is true, is that any short hands to do so? Thanks.

Answer 1

edit/update: Swift 4.2 or later

Swift 4.2 introduced a new method called allSatisfy(_:)

let bools = [true,false,true,true]  if bools.allSatisfy({$0}) {     print("all true") } else {     print("contains false") // "contains false\n" } 

Swift 5.2 we can also use a KeyPath property

class Object {     let isTrue: Bool     init(_ isTrue: Bool) {         self.isTrue = isTrue     } }  let obj1 = Object(true) let obj2 = Object(false) let obj3 = Object(true)  let objects = [obj1,obj2,obj3]  if objects.allSatisfy(\.isTrue) {     print("all true") } else {     print("not all true")  // "not all true\n" } 

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Answer 2

As of Xcode 10 and Swift 4.2 you can now use allSatisfy(_:) with a predicate:

let conditions = [true, true, true] if conditions.allSatisfy({$0}) {   // Do stuff }