I have data in the following format
[\"DATA1-1\",\"DATA1-2\",\"DATA1-3\",\"DATA1-4\",\"\",\"DATA2-1\",\"DATA2-2\",\"DATA2-3\",\"DATA2-4\",\"\",\"DATA3-1\",\"DATA3-2\",\"
The code now works with Swift 2.2
Try like this:
func arraySliceFunction(array: [String]) {
    // Slice the master array with all combinations of airways into separate arrays
    // Iterate through the each subArray 
    for subArray in array.split("") {
        // Iterate through each item in subArray
        for item in subArray {
            print("SLICES COMPONENT: \(item)")
        }
    }
}