Swift上的NSArray Sort函数

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]

Answer 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 }