I am experiencing an issue with Visual Studio 2022 (C# .NET 6.0) where it is giving a CS8602 warning ("Dereference of a possibly null reference") even after a null check is performed. Here is the code snippet: public interface IParameter…
I am trying to see if a username already exist in the database or not, using the following code: Future<bool> checkUsername(userName) async { try { final response = await http.post( Uri.parse('http://10.0.2.2:3000/username'), headers: {'Content-Type': 'application/json'}, body: json.encode({'user_name': userName}), ); print('response ${response.body}');…
You understand better when see the code and error. I have a StatelessWidget names StateWidget like this: class StateWidget extends StatelessWidget { const StateWidget({ super.key, required this.readyWidget, this.error = false, this.errorWidget, this.loading = false, this.loadingWidget, }); final Widget readyWidget; final…
I am quite new to flutter and challenging to create to show images in grid downloading file saved in firebase storage. Getting error code as below and I would like to know how I can fix nullable part... lib/artfolder.dart:53:21: Error:…
I'm a beginner to flutter please someone help! Error: A value of type 'bool?' can't be assigned to a variable of type 'bool' because 'bool?' is nullable and 'bool' isn't. color: isDone ? Color(0xFF7349FE) : Colors.transparent, class TodoWidget extends StatelessWidget…
In php-8 and older versions the following code works class Foo { public function __construct(string $string = null) {} } But in php-8, along with property promotion, it throws an error class Foo { public function __construct(private string $string =…