Dart if object==null

In other languages we can use the logical-or shortcut. If maybeSomeNumber() 
returns null, assign a default value of 2:

value = maybeSomeNumber() || 2

In Dart we can’t do this because the expression needs to be a boolean (“the 
operands of the || operator must be assignable to bool").
That’s why the ?? operator exists:

var value = maybeSomeNumber() ?? 2;

Source: flutterigniter.com

Similar codes

19 votes441 views1 answer
Dart random number
Dart
0 vote333 views1 answer
How to set device into autorotate in flutter
Dart
1 vote347 views1 answer
Dart comments
Dart
3 votes349 views2 answers
Flutter sleep
Dart
15 votes370 views3 answers
Flutter column
Dart
0 vote323 views1 answer
Linear search dart
Dart
2 votes358 views1 answer
Flutter animatedalign
Dart
0 vote301 views0 answer
Dart
0 vote345 views1 answer
Dart iterable firstWhere
Dart
7 votes338 views2 answers
Flutter snackbar color
Dart