The Prototype Pattern

shallowcopy

class Location{
    
    var name:String = ""
    var address:String = ""
    
    init(name:String,address:String) {
        
        self.name = name
        self.address = address
    }
    
    
    
}

class Appointment3:NSObject,NSCopying  {
    
    
    
    var name:String = ""
    var day:String = ""
    var place:Location;
    
    init(name:String,day:String,place:Location) {
        self.name = name
        self.day = day
        self.place = place
        
    }
    
    func copy(with zone: NSZone? = nil) -> Any {
        return Appointment3(name: self.name, day: self.day, place: self.place)
    }
    
    func printDetails(label:String) {
        print("\(label) with \(name) on \(day) at \(place.name), "
            + "\(place.address)");
    }

    
    
}

var beerMeeting = Appointment3(name: "Bob", day: "Mon",
                              place: Location(name:"Joe's Bar", address: "123 Main St"));

var workMeeting = beerMeeting.copy() as! Appointment3;
workMeeting.name = "Alice";
workMeeting.day = "Fri";
workMeeting.place.name = "Conference Rm 2"; workMeeting.place.address = "Company HQ";
beerMeeting.printDetails(label: "Social");
workMeeting.printDetails(label: "Work");