Dart Notes

classes.dart

void main() {
 
  final p = new Employee("Nick", height: 5.8, weight: 210, age: 41, taxCode: "123", salary: 2000000);
  print(p.toString());
}

mixin Health {
  String getLifePercentage(int age) => (100 * (age / 101.00)).toStringAsFixed(3);
  double getBMI(double height, double weight) => weight / (height * height);
}

class Person with Health {
  final String name;
  final int age;
  final double height;
  final double weight;
  
  Person(this.name, { this.age, this.height, this.weight = 0.0 });
  
  String toString() => "name: $name, age: $age, height: $height, bmi: $bmi, life: $lifePercent";
  
  double get bmi => getBMI(this.height, this.weight);
  String get lifePercent => getLifePercentage(this.age);
}

class Employee extends Person {
  final String taxCode;
  final int salary;
  Employee(String name, {int age, double height, double weight, this.taxCode, this.salary}) :
    super(name, age: age, height: height, weight: weight);
  
  String toString() => "${super.toString()} taxCode: $taxCode, salary: $salary";
}

Mixins are kinda slick