Add a method to Card that creates a full deck of cards, with one card of each combination of rank and suit

Question

So I have been doing the experiments that are in the Apple Swift Book.

I have been able to do all of them, except for this one so far. Below is what I have tried, but I can't figure out how to get it working.

Add a method to Card that creates a full deck of cards, with one card of each combination of rank and suit.

// Playground - noun: a place where people can play

enum Rank: Int {
    case Ace = 1
    case Two, Three, Four, Five, Six, Seven, Eight, Nine, Ten
    case Jack, Queen, King

    func simpleDescription() -> String {
        switch self {
            case .Ace:
                return "ace"
            case .Jack:
                return "jack"
            case .Queen:
                return "queen"
            case .King:
                return "king"
            default:
                return String(self.toRaw())
        }
    }
}

enum Suit {
    case Spades, Hearts, Diamonds, Clubs

    func simpleDescription() -> String {
        switch self {
            case .Spades:
                return "spades"
            case .Hearts:
                return "hearts"
            case .Diamonds:
                return "diamonds"
            case .Clubs:
                return "clubs"
        }
    }
}

struct Card {
    var rank: Rank
    var suit: Suit

    func simpleDescription() -> String {
        return "The \(rank.simpleDescription()) of \(suit.simpleDescription())"
    }

    func createFullDeck() -> Array{
        var FullDeck: Array

        FullDeck = Card(rank: .Ace, suit: .Spades)
        FullDeck = Card(rank: .Two, suit: .Spades)

        return FullDeck
    }
}

let threeOfSpades = Card(rank: .Three, suit: .Spades)
let threeOfSpadesDescription = threeOfSpades.simpleDescription()

threeOfSpades.createFullDeck()

• I don't know what I am supposed to return for that method, an Array?
• Should I use a for loop to create this? or is there a proper/easier way to do this with enum
• Why would I create this method inside of Card, calling threeOfSpades.createFullDeck() seems incorrect.

Answer 1

Here's another way of doing it, this time only using techniques you would have learned up to that point*

First we define the possible ranks and suits, using the respective Rank and Suit enums defined previously.

Next we have the function iterate over each rank within each suit, creating a card for each, and finally returning an array of the cards.

struct Card {
    var rank: Rank
    var suit: Suit
    func simpleDescription() -> String {
        return "The \(rank.simpleDescription()) of \(suit.simpleDescription())"
    }

    func createDeck() -> [Card] {
        let ranks = [Rank.ace, Rank.two, Rank.three, Rank.four, Rank.five, Rank.six, Rank.seven, Rank.eight, Rank.nine, Rank.ten, Rank.jack, Rank.queen, Rank.king]
        let suits = [Suit.spades, Suit.hearts, Suit.diamonds, Suit.clubs]
        var deck = [Card]()
        for suit in suits {
            for rank in ranks {
                deck.append(Card(rank: rank, suit: suit))
            }
        }
        return deck
    }
}

(* with the notable exception that the tour hadn't explicitly explained how to append to arrays at that point)