Extending Array to check if it is sorted in Swift?

Question

I want to extend Array class so that it can know whether it is sorted (ascending) or not. I want to add a computed property called isSorted. How can I state the

Answer 1

If you want simple function without arguments, like sort() or sorted() in Swift:

extension Array where Element : Comparable {
    func isSorted() -> Bool {
        guard self.count > 1 else {
            return true
        }

        for i in 1.. self[i] {
                return false
            }
        }
        return true
    }
}