在xcode playground中对具有2个因子的数组进行排序

func quickSort(_ array: [Int]) -> [Int] {
    guard array.count > 1 else { return array }
    
    let pivot = array[array.count/2]
    let less = array.filter { $0 < pivot }
    let equal = array.filter { $0 == pivot }
    let greater = array.filter { $0 > pivot }
    
    return quickSort(less) + equal + quickSort(greater)
}

let array = [1, 2, 4, 8, 16, 32, 64]
let sortedArray = quickSort(array)
print(sortedArray)