dayOfTheWeekIndex method

int dayOfTheWeekIndex({
  1. Weekday firstDay = Weekday.monday,
})

Returns the index of the day of the week With the given firstDay as the first day of the week

Implementation

int dayOfTheWeekIndex({Weekday firstDay = Weekday.monday}) {
  final firstDayIndex = firstDay.index;
  final index = weekday - 1;
  return (index - firstDayIndex + 7) % 7;
}