Swift operator `subscript` []

Question

I am beginner with the Swift having no advance knowledge with operators.

I have the following class

class Container {
   var list: [Any]         


        

Answer 1

Swift 5.2: Subscripting in UserDefaults values - Useful Manager

Static function with generic type

class Defaults {

   static subscript(key: DefaultsKey) -> T? {
      get {
        return UserDefaults.standard.value(forKey: key.rawValue) as? T
      }
      set {
        UserDefaults.standard.set(newValue, forKey: key.rawValue)
      }
    }
}

enum DefaultsKey: String {
    case firstKey = "JSGHDjasgchvsas"
}

Save value

Defaults[.firstKey] = 34

Get value

let value: Int = Defaults[.firstKey]

Happy coding!