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iOS Build a Vending Machine App in Swift 2.0 Loading Data From a Resource Finishing Touches

Initializer for conditional binding must have Optional type, not [String]

Below is my code

class InventroyUnarchiver{ class func vendingInventoryFromDictionary(dictionary: [String:AnyObject]) throws -> [VendingSelection : ItemType]{
var inventory: [VendingSelection : ItemType] = [:] for (key, value) in dictionary{ if let itemDict = value as? [String : Double], let price = itemDict["price"], let quantity = ["quantity"]{

            let item = VendingItem(price: price, quantity: quantity)
            guard let key = VendingSelection(rawValue: key) else{
                throw InventoryError.InvalidKey
            }
            inventory.updateValue(item, forKey: key)
        }
    }

    return inventory
}

}

The compiler keeps giving me this error and I have tried everything to solve it. Can anyone help/explain?

2 Answers

Michael Drexler
Michael Drexler
4,374 Points

Hey Amir Gamil,

this provided code is really hard to read without formatting it. Can you take a closer look at the following line let quantity = ["quantity"]

Did you miss the dictionary here? itemDict["quantity"]

Regards Michael

Ahhhhh yeh now I see it. Thanks a million!

Michael Drexler
Michael Drexler
4,374 Points

You are welcome! I am glad that I could help!