Swift2 - Sort multiple arrays based on the sorted order of another INT array

Question

let points:[Int] = [200, 1000, 100, 500]
let people:[String] = ["Harry", "Jerry", "Hannah", "John"]
let peopleIds:[Int] = [1, 2, 3, 4]
let sex:[String] = ["Male", "Male", "Female", "Male"]

How can I sort this arrays by points to be?:

let points:[Int] = [1000, 500, 200, 100]
let people:[String] = ["Jerry", "John", "Harry", "Hannah"]
let peopleIds:[Int] = [2, 4, 1, 3]
let sex:[String] = ["Male", "Male", "Male", "Female"]

It's not duplicate of How to sort 1 array in Swift / Xcode and reorder multiple other arrays by the same keys changes I've tried with the answers and it's not working

Answer 1

Create a new array of indexes sorted the way you want "descending" and then map the other arrays.

var points:[Int] = [200, 1000, 100, 500]
var people:[String] = ["Harry", "Jerry", "Hannah", "John"]
var peopleIds:[Int] = [1, 2, 3, 4]
var sex:[String] = ["Male", "Male", "Female", "Male"]
//descending order array of indexes
let sortedOrder = points.enumerate().sort({0ドル.1>1ドル.1}).map({0ドル.0})
//Map the arrays based on the new sortedOrder
points = sortedOrder.map({points[0ドル]})
people = sortedOrder.map({people[0ドル]})
peopleIds = sortedOrder.map({peopleIds[0ドル]})
sex = sortedOrder.map({sex[0ドル]})

I just tested this solution out and it works well.

Answer 2

here is the solution with your own data.

let points:[Int] = [200, 1000, 100, 500]
let people:[String] = ["Harry", "Jerry", "Hannah", "John"]
let peopleIds:[Int] = [1, 2, 3, 4]
let sex:[String] = ["Male", "Male", "Female", "Male"]
let sortedPointsEnumerateIndexes = points.enumerate().sort { 0ドル.element > 1ドル.element}.map { 0ドル.index }
var sortedPoints:[Int] = []
var sortedPeople:[String] = []
var sortedPeopleIds:[Int] = []
var sortedSex:[String] = []
for i in sortedPointsEnumerateIndexes {
 sortedPoints.append(points[i])
 sortedPeople.append(people[i])
 sortedPeopleIds.append(peopleIds[i])
 sortedSex.append(sex[i])
}
print(sortedPoints) // [1000, 500, 200, 100]
print(sortedPeople) // ["Jerry", "John", "Harry", "Hannah"]
print(sortedPeopleIds) // [2, 4, 1, 3]
print(sortedSex) // ["Male", "Male", "Male", "Female"]
// with map
let sorted2Point = sortedPointsEnumerateIndexes.map{ points[0ドル] }
let sorted2People = sortedPointsEnumerateIndexes.map{ people[0ドル] }
// ....
print(sorted2Point) // [1000, 500, 200, 100]
print(sorted2People) // ["Jerry", "John", "Harry", "Hannah"]