private IEnumerable<(string Title, string Date)> GetFormattedHolidays(CalendarDto calendarDto)
{
foreach (var holiday in calendarDto.Holidays)
{
foreach (var day in calendarDto.Days)
{
if (day.Holiday == holiday.Id.ToString())
{
var date = day.Day?.ToString("dd MMMM", _context.Culture);
yield return ($"{holiday.Title}", $"{date}");
}
}
}
}
D
GroupBy statement to group them by the monthD
SDSDD
var grouped = calendarDto.Days.GroupBy(x => x.Month); isn't that inconvenientDDDS
P
ASSD
DateTimeSelect really. thats like, 90% of itPokay, lets group the days by month, then I need to separate the days (values) from the month (key) into a string.
for the days, we just join them up (but days are not strings, so we "extract" the string we want with another select)
for the month, we use CultureInfo to get the month name because our month key is an int
S
PSelect is often called Map in other languages. SelectMany is often called BindSP
A/closeGroupByvar grouped = calendarDto.Days.GroupBy(x => x.Month);internal record CalendarDto(
List<DayDto> Days,
short Year,
List<HolidayDto> Holidays);
internal record DayDto(
DateTime? Day,
DateTime? From,
string Type,
string Holiday);
internal record HolidayDto(
int Id,
string Title);1, 2, 3 January
6, 7, 8 MarchSelectSelectMapSelectManyBindvar grouped = data.Days
.GroupBy(x => x.Day.Value.Month)
.Select(x =>
$"{string.Join(", ", x.Select(y => y.Day.Value.Day))} {CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(x.Key)}")
.ToArray();
Console.WriteLine(string.Join("\n", grouped));