Easy
What is the ??= operator for?
Author: Edouard MarquezStatus: PublishedQuestion passed 1823 times
Edit
3
Community Evaluations
Incorrect answer
Auteur anonyme18/08/2024
There is no ??= operator in Flutter/Dart
Flutter and Dart use the ?? operator, not ??=.
The ?? operator
The ?? operator is the null-aware coalescing operator. It provides a concise way to check if an expression is null and return an alternative value if it is.
Syntax:
Dart
expression1 ?? expression2
Use code with caution.
Behavior:
If expression1 is not null, the operator returns expression1.
If expression1 is null, the operator returns expression2.
Example:
Dart
String name = null;
String displayName = name ?? 'Guest'; // displayName will be 'Guest'
Use code with caution.
Remember: There's no assignment involved with ??. It's solely for checking null values and providing alternatives.
Dragon parfait
26/08/2024
Dart documentation mention the `??=` operator : https://dart.dev/language/operators#assignment-operators
7
What is Dash?8
Explain the difference between the *final* and *const* keywords in Flutter.9
Explain the difference between the `main` and `runApp` methods in Flutter.17
List the different build modes in Flutter6
How to communicate with Android/ iOS code with Flutter?5
What is the BuildContext used for in Flutter?5
Explain the difference between a Hot Restart and a Hot Reload in Flutter.