Ambiguous Use of Subscript (Swift 3)

Question

I am using the subscript in the following code incorrectly for this Firebase data pull, but I can\'t figure out what I am doing wrong. I get an error of Ambiguous use of su

Answer 1

My preferred way of dealing with data is to unwrap the FIRDataSnapshot as late as possible.

ref!.observe(.value, with: { (snapshot) in
    for child in snapshot.children {
        let msg = child as! FIRDataSnapshot
        print("\(msg.key): \(msg.value!)")
        let val = msg.value! as! [String:Any]
        print("\(val["name"]!): \(val["message"]!)")
    }
})