What means the operator "??" in Dart/Flutter? - Stack Overflow
Nov 3, 2020 · What means the operator "??" in Dart/Flutter? [duplicate] Asked 5 years, 1 month ago Modified 5 years, 1 month ago Viewed 16k times
What are the ?? double question marks in Dart? - Stack Overflow
Jan 4, 2019 · The following line of code has two question marks: final myStringList = prefs.getStringList('my_string_list_key') ?? []; What is the meaning?
What's the meaning of “=>” (arrow) in Dart/Flutter?
Dec 17, 2020 · What's the meaning of “=>” (arrow) in Dart/Flutter? Asked 4 years, 11 months ago Modified 2 years, 4 months ago Viewed 34k times
What Is The Purpose of @override used in Flutter?
Jul 7, 2018 · 47 In the flutter documentation the keyword @override is used a lot in classes. I tried to search for the meaning but still can't understand. What is the purpose of this @override …
What does Underscore "_" before variable name mean for Flutter
with reference to the Flutter tutorial, I encountered an underscore, _. I know that in Java, _ is used as a naming convention for a private variable. Does it also apply to Flutter? Noting that the...
'MyhomePage({Key key, this.title}) : super(key: key);' in Flutter ...
Aug 28, 2018 · Flutter uses Keys for a lot of things inside the framework. Since your widget extends StatelessWidget or StatefulWidget, this is the way of your widget having a key so that …
What is the caret sign (^) before the dependency version number …
Dec 1, 2018 · In the pubspec.yaml file of my Flutter project there is a caret (^) before the version number of some of the dependencies. dependencies: flutter: sdk: flutter cupertino_icons: ^0.1.2
constants - What is the difference between the "const" and "final ...
May 20, 2018 · Const: "const" has a meaning that's a bit more complex and subtle in Dart. const modifies values. You can use it when creating collections, like const [1, 2, 3], and when …
In FLUTTER / DART, why do we sometimes add a question mark to …
Mar 29, 2021 · In FLUTTER / DART, why do we sometimes add a question mark to "String" when declaring a variable? Asked 4 years, 8 months ago Modified 2 years, 6 months ago Viewed …
flutter - Dart: What does a question mark (?) after a variable name ...
Feb 25, 2021 · itemCount: _contacts?.length ?? 0, and I have two question on that, what is meant by variableName? ( variableName followed by question mark '? ') e.g in above _contacts? The …