snack.swift

enum Snack {
    case gum
    case cookie
}

struct Item {
    let price: Int
    let quantity: Int
}

let inventory: [Snack: Item] = [
    .gum: Item(price: 1, quantity: 5),
    .cookie: Item(price: 2, quantity: 3)
]

let someItem = Item(price: 2, quantity: 3)