How do I shuffle an array in Swift?

Question

How do I randomize or shuffle the elements within an array in Swift? For example, if my array consists of 52 playing cards, I want to shuffle the array in o

Answer 1

Simple Example:

extension Array {
    mutating func shuffled() {
        for _ in self {
            // generate random indexes that will be swapped
            var (a, b) = (Int(arc4random_uniform(UInt32(self.count - 1))), Int(arc4random_uniform(UInt32(self.count - 1))))
            if a == b { // if the same indexes are generated swap the first and last
                a = 0
                b = self.count - 1
            }
            swap(&self[a], &self[b])
        }
    }
}

var array = [1,2,3,4,5,6,7,8,9,10]
array.shuffled()
print(array) // [9, 8, 3, 5, 7, 6, 4, 2, 1, 10]