How to copy a “Dictionary” in Swift?

Question

How to copy a \"Dictionary\" in Swift?

That is, get another object with same keys/values but different memory address.

Furthermore, how to copy an object in

Answer 1

Object

class Person: NSObject, NSCopying {
    var firstName: String
    var lastName: String
    var age: Int

    init(firstName: String, lastName: String, age: Int) {
        self.firstName = firstName
        self.lastName = lastName
        self.age = age
    }

    func copyWithZone(zone: NSZone) -> AnyObject {
        let copy = Person(firstName: firstName, lastName: lastName, age: age)
        return copy
    }
}

Usage

let paul = Person(firstName: "Paul", lastName: "Hudson", age: 35)
let sophie = paul.copy() as! Person

sophie.firstName = "Sophie"
sophie.age = 5

print("\(paul.firstName) \(paul.lastName) is \(paul.age)")
print("\(sophie.firstName) \(sophie.lastName) is \(sophie.age)")

Source: https://www.hackingwithswift.com/example-code/system/how-to-copy-objects-in-swift-using-copy