Accessing Array outside of the loop [duplicate] - arrays

Question

This question already has an answer here:
Assign value of a Firestore document to a variable
(1 answer)
Closed 2 years ago.
I have an Array where some different UserID's are stored.
Each UserID is connected with their corresponding data in Firestore.
So now I want to fetch all the JSON Data from the UserID's and make them accessible to decode them later.
Therefore the fetched Data (coming as a Dictionary) from each user must be accessible separately.
I tried it with that way:
var fetchedIDs = ["ID1", "ID2", "ID3"]
var finalArray = [[String: Any]]()
for id in fetchedIDs{
let docRef = Firestore.firestore().collection("Data").document(id)
docRef.getDocument { (document, error) in
if let document = document, document.exists {
let myDict: [String: Any] = document.data() as! [String: Any]
finalArray.append(myDict)
}
}
}
}
But the problem is that the finalArray (like finalArray[0]) is just accessible in the For-Loop.
It should be accessible outside of the loop and look like that:
finalArray[0] should have the Dictionary data from ID1
finalArray[1] should have the Dictionary data from ID2
Maybe I am thinking to complicated for that..
Can someone help me out ?
Is there generally a good source for learning about scopes and how the data should be accessed like in that scenario?
Thanks!

Answer 1

Finally get it working with the following code:
var fetchedIDs = ["ID1", "ID2", "ID3"]
func loadData(com:#escaping( ([[String: Any]]) -> ())){
var myArray = [[String: Any]]()
for id in fetchedIDs{
let refLike = db.collection("Data").document(id)
refLike.getDocument { (document, error) in
if let err = error {
print("Error getting documents: \(err)")
} else {
let myDict: [String: Any] = document?.data() as! [String: Any]
myArray.append(myDict)
}
com(myArray)
}
}
}
loadData(){ arr in
if (arr.count == fetchedIDs.count){
print ("User 1 has the following data: \(arr[0])")
print ("User 2 has the following data: \(arr[1])")
}
}