In the Workout class below, I'd like to initialize avgCalorieBurn to be the average of calorie burn for each exercise inside that class. Is there a way to do this?
class Wourkout {
List<Exercise> exercises;
int? avgCalorieBurn;
Wourkout({required this.exercises, this.avgCalorieBurn});
}
class Exercise {
int calorieBurn;
Exercise({required this.calorieBurn});
}
You can add a method to the constructor. As stated in here. Also, typo in Wourkourt => Workout
class Workout {
List<Exercise> exercises;
int? avgCalorieBurn; // or late int avgCalorieBurn;
Workout({required this.exercises}) {
int sum = 0;
exercises.forEach((exercice) {
sum += exercice.calorieBurn;
});
avgCalorieBurn = sum ~/ exercises.length; // Truncated integer division
}
}
class Exercise {
int calorieBurn;
Exercise({required this.calorieBurn});
}
class Wourkout {
List<Exercise> exercises;
double? avgCalorieBurn;
Wourkout({required this.exercises})
: avgCalorieBurn = exercises.length == 0
? null
: exercises.map((e) => e.calorieBurn).reduce((a, b) => a + b) / exercises.length;
}
class Exercise {
int calorieBurn;
Exercise({required this.calorieBurn});
}
I changed the average to a double, because that is what you get as the average between integers.
