numberOfWeeksInYear function
- int year
Gets the number of weeks in a year
Implementation
int numberOfWeeksInYear(int year) {
final DateTime dec28 = DateTime(year, 12, 28);
final int dayOfDec28 = int.parse(DateFormat('D').format(dec28));
return ((dayOfDec28 - dec28.weekday + 10) / 7).floor();
}