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

0 vote201 views1 answer
Flutter iterate over list widget
Dart
0 vote215 views1 answer
Print an object dart
Dart
25 votes339 views6 answers
Flutter snackbar top
Dart
0 vote219 views1 answer
Flutter cupertinoapp
Dart
1 vote200 views3 answers
Round off double in flutter
Dart
0 vote204 views1 answer
How to create random gradient in flutter
Dart
0 vote215 views1 answer
Dart truncate
Dart
1 vote222 views1 answer
How to repeatedly call a function flutter
Dart
-1 vote217 views2 answers
First caractere in String in dart
Dart
0 vote233 views1 answer
Random.secure dart
Dart