Rotate Array in Swift

Question

While exploring algorithms in Swift, couldn\'t find algorithm for array rotation in swift without using funcs shiftLeft / shiftRight.

C has

Answer 1

// a is the array to be left rotated // d is the number of unit for left rotation

func rotLeft(a: [Int], d: Int) -> [Int] {
    var a = a
    for index in 0...(d - 1) {
       a.append(a[0])
       a.remove(at: 0)
     }
    return a
 }

// calling Function

rotLeft(a: [1,2,3,4,5], d: 4)

// OutPut [5, 1, 2, 3, 4]