Codable with string array

This question is more of an aesthetic one. I have a simple Codable with a string array. I use it to encode and decode a plist:

struct Favorites: Codable {
  var favorites: [String]
}

The one thing that bothers me about this is when I e.g. add an element to the array, I have to do this:

favorites.favorites += [phrase]

Is there something I can do to prevent having to write the double favorites.favorites?

>Solution :

If you want to avoid writing favorites two times, you can add subscript to your Favorites struct and also add mutating method to add items in your array.

struct Favorites: Codable {
    var favorites: [String]
    
    subscript(index: Int) -> String {
        favorites[index]
    }
    
    mutating func addItem(_ item: String) {
        favorites.append(item)
    }
    
    mutating func addItems(_ items: [String]) {
        favorites.append(contentsOf: items)
    }
}

Now your can access your favorites array as with instance of Favorites struct using subscript like this.

var favorites = Favorites(favorites: ["Apple"])
print(favorites[0]) // print Apple
favorites.addItem("Banana")
print(favorites[1])// print Banana