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

5 votes168 views2 answers
Flutter conditional statement
Dart
0 vote163 views1 answer
How to use flaticon as icon in flutter
Dart
0 vote167 views1 answer
Flutter call phone number
Dart
1 vote190 views1 answer
Dart constructor assert
Dart
12 votes182 views3 answers
Flutter appbar width
Dart
1 vote168 views1 answer
Flutter check type of object
Dart
1 vote167 views1 answer
Undeline to text in flutter
Dart
9 votes119 views2 answers
Material button shape flutter
Dart
0 vote188 views1 answer
Flutter open whatsapp chat
Dart
1 vote156 views1 answer
Flutter beta switch
Dart