Expected declaration when adding values to a Swift dictionary [duplicate] - swift

Question

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swift compiler shows Expected declaration error? [duplicate]
(3 answers)
Expected Declaration Error using Swift
(1 answer)
Closed 5 years ago.
I get the error "expected declaration" on the last line when trying to add values to the dictionary tablesBooked.
class BookingSystem {
var tablesBooked = Dictionary<Int, String>()
var table = Table(tableID: 1 , tableCapacity: 2, status: "A")
var bookings = [Booking]()
tablesBooked.setValue(table.status, forKey: table.tableID)
}

Answer 1

You get this error because your line setValue cannot just live here inside your class without being inside a method. Of course here it really depends on what (and how) you want to accomplish, but you could put it in the init() method of your BookingSystem class, or you could build your own custom init().
Here is how it would look like:
import Foundation
class Booking {
// Some interesting things here
}
class Table : NSObject {
// MARK: Properties
var tableID: Int
var tableCapacity: Int
var status: String
// MARK: Initializers
init(tableID: Int, tableCapacity: Int, status: String) {
self.tableID = tableID
self.tableCapacity = tableCapacity
self.status = status
}
}
class BookingSystem {
// MARK: Properties
var tablesBooked = [Int: String]()
var table = Table(tableID: 1 , tableCapacity: 2, status: "A")
var bookings = [Booking]()
// MARK: Initializers
init() {
// I am not sure what you are trying to do here, but anyway you should add it in a custom method or your init. If I were to use the code in your example, you would add this here:
tablesBooked[table.tableID] = table.status
}
// ...
}
I added the Table class here on purpose, just to show you an example on how to create your own custom init.
Also, another thing worth mentioning here is that Swift Dictionaries don't have a setValue:forKey: method. Instead, to add an object to your Dictionary, you should use:
yourDictionnary["yourKey"] = yourValue
Hope it helps, and if you have any questions just feel free asking :)

Answer 2

Use init method:
class BookingSystem {
var tablesBooked = Dictionary<Int, String>()
var table = Table(tableID: 1 , tableCapacity: 2, status: "A")
var bookings = [Booking]()
init() {
tablesBooked.setValue(table.status, forKey: table.tableID)
}
}