CODEWITHSUNDEEP
iosarraysswift
user10460877
user10460877

Reputation:

Convert Object array into String array

How can I convert this object array into a string array? I'm reading records from a firebase collection.

    firebaseDB.collection("message").document(key).collection("messages").getDocuments() { (querySnapshot, err) in
        if let err = err {
            print("Error getting documents: \(err)")
        }
        else {
            self.driverArr.removeAll()
            for document in querySnapshot!.documents {
                print("\(document.documentID) => \(document.data())")
                let msgdata = document.data() as! [String:Any]
                var msgObj = Message()
                if let name = msgdata["name"] as? String {
                    msgObj.name = name
                }
                self.driverArr.append(msgObj)
            }
            if self.driverArr.count < 1 {
                print("No Drivers")
            }
            else{
                print("*** Driver Names array ***")
                print(self.driverArr)
            }
        }
    }

The current output of this array is:

[MainApp.Message(name: Optional("Oliver"), userId: Optional(""), msg: Optional(""), creatAt: Optional(0), latitude: Optional(""), longitude: Optional("")), MainApp.Message(name: Optional("Bluesona"), userId: Optional(""), msg: Optional(""), creatAt: Optional(0), latitude: Optional(""), longitude: Optional("")), MainApp.Message(name: Optional("Oliver"), userId: Optional(""), msg: Optional(""), creatAt: Optional(0), latitude: Optional(""), longitude: Optional(""))]

I wish to simply output an array that contains an Array of strings with the names ["Oliver", "Bluesona"...]

Upvotes: 1

Views: 1610

Answers (1)

Rakesha Shastri
Rakesha Shastri

Reputation: 11243

You can use compactMap to get all the valid names in the array.

print( driverArr.compactMap({$0.name}) )

Upvotes: 4

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