NSArray Sort Function on Swift

Question

I have an array called People. People array contains the Person objects. I am trying to sort the array in ascending order based on the firstName.

 var people :[Person] = []

 people.sort { $0.firstName > $1.firstName }

I get the following error:

() is not convertible to [Person]

But how is it declared? Can you include the declaration in your question? — Ideasthete
– Ideasthete, Commented Oct 8, 2014 at 4:27
(Again,) a complete self-contained example demonstrating the problem would have been helpful. I can see no obvious error in the code. For future readers it would be helpful to know which part of the answer solved your problem. — Martin R
– Martin R, Commented Oct 8, 2014 at 5:05

Ideasthete · Accepted Answer · 2014-10-08 04:33:09Z

1

I believe you just need to specify the type of the array more explicitly when initializing it. This code works:

class Person {
    var firstName: String = "FirstName"
    var lastName: String = "LastName"

    init(inputFirstName: String, inputLastName: String) {
        firstName = inputFirstName
        lastName = inputLastName
    }
}
var people: [Person] = [Person]()

people.append(Person(inputFirstName: "A", inputLastName: "B"))
people.append(Person(inputFirstName: "B", inputLastName: "C"))
people.append(Person(inputFirstName: "C", inputLastName: "D"))
people.append(Person(inputFirstName: "D", inputLastName: "E"))
people.append(Person(inputFirstName: "E", inputLastName: "F"))
people.append(Person(inputFirstName: "F", inputLastName: "G"))
people.append(Person(inputFirstName: "G", inputLastName: "H"))
people.append(Person(inputFirstName: "H", inputLastName: "I"))

people.sort { $0.firstName > $1.firstName }

answered Oct 8, 2014 at 4:33

Ideasthete

1,54113 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Martin R Over a year ago

var people :[Person] = [] as in the question works as well. It would be interesting to know what the actual problem was.

Ideasthete Over a year ago

Strange. Yeah, I couldn't imagine why the example in the question didn't work but thought maybe that was the difference based on the error message. Maybe a version difference in Xcode/Swift?

davecom Over a year ago

Might be another of the notorious type inference bugs.

Collectives™ on Stack Overflow

NSArray Sort Function on Swift

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related