Sort custom array according to a string array in SWIFT

Question

I have a Custom Array like this:

 var myStudentArray1: Array<Student!> = []

     myStudentArray1.append(Student(sCategory: "A+", sName: "Zara"))
     myStudentArray1.append(Student(sCategory: "B-", sName: "Koli"))
     myStudentArray1.append(Student(sCategory: "AA", sName: "Asim"))

I have another String array with same one element of that array1 but in different sequence, like this:

let myStudentArray2: Array<String!> = ["Asim", "Zara", "Koli"]

How do I sort myStudentArray1 based on myStudentArray2 ?

Shripada · Accepted Answer · 2015-12-22 08:49:11Z

1

You will need to iterate through the second array, and for each entry there find corresponding entry in myStudentArray1, and add them to a third array. That will contain items sorted in the order of the second array myStudentArray2

func sortStudents(students: [Student], byNames: [String] ) -> [Student
{

  var result = [Student]()

  for name in byNames {
     let students = students.filter{ $0.sName == name}
     if students.count > 0{
        result.append(students[0])
     }
  }
  return result

}

Now you can call this function to get the sorted results as:

let sortedResults = sortStudents(myStudentArray1, myStudentArray2)

edited Dec 22, 2015 at 8:49

answered Dec 22, 2015 at 5:11

Shripada

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2 Comments

Asim Roy Over a year ago

Getting a consecutive line error here **if let students = students.filter{ $0.sName == name}{ **

Shripada Over a year ago

@AsimKrishnaDas oh, I had just typed it, now fixed. Pl. check

Caleb · Accepted Answer · 2015-12-22 05:38:14Z

0

An easy solution is to just sort them both based on the same thing.

myStudentArray1.sortInPlace{$0.sName < $1.sName}
myStudentArray2.sortInPlace{$0 < $1}

for i in 0..<myStudentArray1.count {
    print("\(myStudentArray1[i].sName) = \(myStudentArray2[i])")
}
// Output: Asim = Asim | Koli = Koli | Zara = Zara

answered Dec 22, 2015 at 5:38

Caleb

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