Compare arrays in swift

Question

Trying to understand how swift compares arrays.

var myArray1 : [String] = [\"1\",\"2\",\"3\",\"4\",\"5\"]
var myArray2 : [String] = [\"1\",\"2\",\"3\",\"4\",         


        

Answer 1

For compare arrays of custom objects we can use elementsEqual.

class Person {

    let ID: Int!
    let name: String!

    init(ID: Int, name: String) {

        self.ID = ID
        self.name = name
    }
}

let oldFolks = [Person(ID: 1, name: "Ann"), Person(ID: 2, name: "Tony")]
let newFolks = [Person(ID: 2, name: "Tony"), Person(ID: 4, name: "Alice")]

if oldFolks.elementsEqual(newFolks, by: { $0.ID == $1.ID }) {

    print("Same people in same order")

} else {

    print("Nope")
}