I love Firebase, but the Swift code in the iOS guide is of really low quality. For example (https://firebase.google.com/docs/database/ios/save-data#delete_data

I love Firebase, but the Swift code in the iOS guide is of really low quality. For example (https://firebase.google.com/docs/database/ios/save-data#delete_data https://firebase.google.com/docs/database/ios/save-data#dele...): if currentData.value != nil, let uid = FIRAuth.auth()?.currentUser?.uid { var post = currentData.value as! [String : AnyObject] var stars : Dictionary<String, Bool> stars = post["stars"] as? Dictionary<String, Bool> ?? [:] // ... } What this should really be: guard let post = currentData.value as? [String : AnyObject], uid = FIRAuth.auth()?.currentUser?.uid else { return FIRTransactionResult.successWithValue(currentData) } let stars = post["stars"] as? [String : Bool] ?? [:] // ... }