如何获得未来的权利<either<error, list<dynamic> &gt;&gt; 在 Flutter? </either<error,>

Question

I fetch data with code as below:

Future<Either<ResponseError, List<dynamic>>> _getResult(url) {
  return  RequestApi(url).fetchList();
}

I want to get List and use it to do something else, I knew how to use FutureBuilder to build Widget, but I want to try to use use Future, what can I do to get Right of Either? I tried

Answer 1

I personally use a try catch and return left or right

Future<Either<List<dynamic>>, Exception> _getResult(url) async {
 try {
      final response = await http.post(url);
      if (response == null) throw ResponseNullException();
      return Left(response.asList());
    } catch (e, s) {
      return Right(e);
    }
}