For loop doesn't iterate through the whole variable, instead it only performs the functionality-CodePudding

I'm trying to delete the todos in the Map data-type (todoDate) I have created.
the Map<String, List> data type variable problem (todoDate) problem: I want every key in the Map to be deleted but instead what happens is that only the key with index 0 is deleted and the rest remain. Thanks for helping.

String uid = FirebaseAuth.instance.currentUser!.uid.toString(); 
final todo =
    FirebaseFirestore.instance.collection('users').doc(uid).collection('todos');

void Function()? deleteTodoCollection(Map<String, List<String>> todoDate) {
  //delete from firebase
  todo.get().then((snapshot) {
    for (DocumentSnapshot doc in snapshot.docs) {
      doc.reference.delete();
    }
  });

  //delete from the todoDate map
  for (var key in todoDate.keys) { 
    todoDate.remove(key);
    print(todoDate);
  }
  return null;
}

CodePudding user response：

try toList()

...
for (var key in todoDate.keys.toList()) {
...