Casting Lists and Maps in Dart
Another short Dart tip today, and another one that occurred while testing some dart code, but most useful for me when parsing JSON.
List<dynamic> I got from a JSON Map, when trying to save them as
List<String> the errors like:
type 'List<dynamic>' is not a subtype of type 'List<String>'
The fix is as simple as using something like that:
List<String> correctList = <dynamic>.cast<String>();
And for JSON maps that I needed to be parsed as
type '_InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'Map<String, String>?'
Here the fix is very similar to our
Map<String, String> correctMap = Map<String, dynamic>().cast<String, String>();
Enjoy your collection casting!