How to make a List with months from current to previous etc.. Flutter/Dart-CodePudding

i can think how can you make a list with months from current'octomber' to previous etc etc, this list can have 12 months from now octomber 2022 to november 2021. not hardcoded, automated.

CodePudding user response：

You can use intl package like this:

List months = [];
for (var i = 0; i < 12; i  ) {
  var monthNumber = (DateTime.now().month - i);
  var monthDate = DateFormat.M().parse(
      (monthNumber < 1 ? 12 - (-monthNumber) : monthNumber).toString());
  var month = DateFormat.MMMM().format(monthDate);
  months.add(month);
}
print("months = $months");//months = [October, September, August, July, June, May, April, March, February, January, December, November]

if you get your list in Int try this:

List months = [];
for (var i = 0; i < 12; i  ) {
  var monthNumber = (DateTime.now().month - i);
  var month = (monthNumber < 1 ? 12 - (-monthNumber) : monthNumber);
  months.add(month);
}
print("months = $months");//months = [10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 12, 11]

CodePudding user response：

Here:

void main() {
  List<String> months = [
    'January',
    'February',
    'March',
    'April',
    'May',
    'June',
    'July',
    'August',
    'September',
    'October',
    'November',
    'December'
  ];
  
  DateTime now = DateTime.now();
    
  print(months);

  var result=(months
                ..addAll(months.getRange(0, now.month))
                ..removeRange(0,now.month)
             )
            .reversed.toList();
 
  
  
  print(result);
}