Dart class

class Car {  
   // field 
   String engine = "E1001";  
   
   // function 
   void disp() { 
      print(engine); 
   } 
}

Source: tutorialspoint.com

Dart how to tell if an object is an instance of a class

if (emp is Person) {
  // Type check
  emp.firstName = 'Bob';
}

Source: dart.dev

Dart set final variable in constructor

// You cannot mutate final variables in a constructor body, 
// instead you must use a special syntax.
// Also note if you have a super() call, it must be called last.
class Point {
  final num x;
  final num y;
  final num distanceFromOrigin;

  // Special syntax
  Point(this.x, this.y) :
    distanceFromOrigin = sqrt(pow(x, 2) + pow(y, 2));
}

Source: stackoverflow.com

Similar codes

4 votes339 views1 answer
Flutter rotatedbox
Dart
0 vote335 views1 answer
Flutter textformfield decimal
Dart
0 vote273 views1 answer
Flutter vs
Dart
6 votes335 views1 answer
Flutter listtile shape border
Dart
5 votes356 views1 answer
DartPad requires localStorage to be enabled
Dart
0 vote316 views1 answer
Sliverappbar with tabbar flutter
Dart
0 vote350 views1 answer
Flutter sharedpreferences clear
Dart
1 vote323 views1 answer
Flutter disable horizontal
Dart
1 vote390 views1 answer
Dart trim
Dart
1 vote328 views1 answer
Dart set list spread operator
Dart