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

3 votes110 views1 answer
Dart Shader compilation error
Dart
5 votes109 views1 answer
Setting backgroundColor for snack bar does not change background color
Dart
4 votes106 views1 answer
Getters and setters dart
Dart
1 vote116 views3 answers
Flutter only on debug mode
Dart
4 votes114 views2 answers
Flutter container border only top
Dart
4 votes108 views1 answer
Flutter vertical space between containers
Dart
24 votes216 views3 answers
Dart timer delay
Dart
1 vote103 views1 answer
Dart contains method
Dart
4 votes100 views1 answer
Dart extension function
Dart
0 vote109 views1 answer
Convert datetime to TZDateTimeflutter
Dart