Imagine you have a large codebase with a lot of people working on it. You introduce a new parameter to a commonly used function or object. However, you don't want to make the parameter mandatory because there might be a rare use case where it shouldn't be provided. In such cases, it...
The core problem is that Dart makes a semantic distinction between "passednull" and "did not pass a value", but the latter has no first-class representation in the language. Where JS hasundefined, we have nothing. Getting rid ofundefinedis great, but our optional parameter semantics still ha...
To define optional parameters in TypeScript functions, you can use the question mark (?) symbol after the parameter name in the function declaration. This indicates that the parameter is optional and can be omitted when calling the function. The general syntax for a function with optional paramet...
Issue for more optional trailing comma support:dart-lang/language#2430 I would be in favor ofnotsupporting optional trailing commas there. The parameters of a catch clause are not expressions. They are either one or two identifiers separated by a comma. I think they shouldn't feel like express...
i have errors in Ln12 import 'package:flutter/material.dart'; import 'package:google_maps_flutter/google_maps_flutter.dart'; import '../models/place.dart'; class MapScreen extends StatefulWidget { final PlaceLocation initialLocation; fin...