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

class Container {
    private var list = [Any]()
    subscript(_ index: Int) -> Int? {
       get {
            guard index < list.count else { return nil }
            return list[index]
      }
       set(newValue){
          guard let unwrappedElement = newValue else { return }
          list.insert(unwrappedElement, at: index)
       }
    }
}

Here we are using subscripts with optional type to handle index out of range.