generic secondarySort() function for Swift

SecondarySort.swift

enum SortType {
    case Ascending, Descending
}

func secondarySort<A: Comparable, B>(arr1:[A], inout arr2:[B], type:SortType = .Ascending) {
    var rows = arr1.map{(object1:$0, object2:arr2.removeFirst())}
    rows = type == .Ascending ? rows.sort({$0.object1 < $1.object1}) : rows.sort({$0.object1 > $1.object1})
    arr2 = rows.map{$0.object2}
}

var Distances = [40,30,10,20]
var IDs = ["f","nc","n","c"]
var Descriptions = ["furthest","not close","nearest","close"]
var Lats = [100.12,88.3,28.07,36.0]
var Longs = [100.12,88.3,28.07,36.0]

secondarySort(Distances, arr2: &IDs)
secondarySort(Distances, arr2: &Descriptions)
secondarySort(Distances, arr2: &Lats)
secondarySort(Distances, arr2: &Longs)

Distances = Distances.sort(<)  // [10, 20, 30, 40]
IDs  // ["n", "c", "nc", "f"]
Descriptions // ["nearest", "close", "not close", "furthest"]
Lats // [28.07, 36, 88.3, 100.12]
Longs // [28.07, 36, 88.3, 100.12]

// Descending order
secondarySort(Distances, arr2: &IDs, type:.Descending)
secondarySort(Distances, arr2: &Descriptions, type:.Descending)
secondarySort(Distances, arr2: &Lats, type:.Descending)
secondarySort(Distances, arr2: &Longs, type:.Descending)

Distances = Distances.sort(>)  // [40, 30, 20, 10]
IDs  // ["f", "nc", "c", "n"]
Descriptions // ["furthest", "not close", "close", "nearest"]
Lats // [100.12, 88.3, 36, 28.07]
Longs // [100.12, 88.3, 36, 28.07]