How to call a List with Strings to make the call dynamic - flutter

Question

I'm searching for create a dynamic form which contain DropDownButtons.
Before do that, I'm trying something on DartPad to know if it's possible to call a list with some Strings.
Below an example about what I want to do (maybe what I'm searching for is now possible) :
void main() {
List<Map<String, String>> listOf3AInitial = [{"name": "4A"},
{"name": "5A"}
];
String _listOf = "listOf";
String _year = "3A";
String _type = "Initial";
var listOfType = "$_listOf$_year$_type";
print(listOfType);
}
In this case it print "listOf3AInitial" and I want to print the List {"name": "4A"},{"name": "5A"}.
How it is possible to do that ?
Regards

Answer 1

You have to map a string of it's value to do so. For example
List<Map<String, String>> listOf3AInitial = [{"name": "4A"}, {"name": "5A"}];
Map<String, List<Map<String, String>>> list3AInitialMap = {
"listOf3AInitial" : listOf3AInitial,
};
Now you can get a value from this map like
String _listOf = "listOf";
String _year = "3A";
String _type = "Initial";
var listOfType = "$_listOf$_year$_type";
print(list3AInitialMap[listOfType]);

Answer 2

Your var listOfType returns a String. Unfortunately, you cannot use/convert String as a variable name.
In this case, you may want to use a map:
void main() {
List<Map<String, String>> listOf3AInitial = [{"name": "4A"},{"name": "5A"}];
List<Map<String, String>> listOf3BInitial = [{"name": "4B"},{"name": "5B"}];
String _listOf = "listOf";
String _yearA = "3A"; //A
String _yearB = "3B"; //B
String _type = "Initial";
//Reference your lists in a map
Map<String, dynamic> myLists = {
"listOf3AInitial": listOf3AInitial,
"listOf3BInitial": listOf3BInitial
};
//This returns your listOf3AInitial
var listOfType = myLists["$_listOf$_yearA$_type"];
print(listOfType);
//You may also access it directly
print(myLists["$_listOf$_yearB$_type"]);
}