private static void Queries()
{
Vector <Email> emails = InitMails();
var emailsVandaag = emails
.Where(mail => mail.Received.Date == DateTime.Now.Date)
.OrderByDescending(mail => mail.Received);
var emailsVandaagQuerySyntax = from mail in emails
where mail.Received.Date == DateTime.Now.Date
orderby mail.Received descending
select mail;
var emailsDitJaar = emails
.Where(mail => mail.Received.Year == DateTime.Now.Year)
.OrderByDescending(mail => mail.Received);
Console.WriteLine("Geef een zoekterm in: ");
string zoekterm = Console.ReadLine();
var emailsMetKeyword = emails.Where(mail => mail.Body.ToLowerInvariant().Contains(zoekterm.ToLowerInvariant())).OrderByDescending(mail => mail.Received);
Console.WriteLine(string.Join(" ", emailsMetKeyword));
DateTimeFormatInfo formatInfo = DateTimeFormatInfo.CurrentInfo;
Calendar calendar = formatInfo.Calendar;
// email.Where(...).Count() werkt ook, maar dit is een kortere notatie
int emailsDezeWeek = emails.Count(mail => mail.Received.Year == DateTime.Now.Year &&
calendar.GetWeekOfYear(mail.Received, CalendarWeekRule.FirstDay, DayOfWeek.Monday) == calendar.GetWeekOfYear(DateTime.Now, CalendarWeekRule.FirstDay, DayOfWeek.Monday));
int emailsDezeWeekQuerySyntax = (from mail in emails
where mail.Received.Year == DateTime.Now.Year &&
calendar.GetWeekOfYear(mail.Received, CalendarWeekRule.FirstDay, DayOfWeek.Monday) == calendar.GetWeekOfYear(DateTime.Now, CalendarWeekRule.FirstDay, DayOfWeek.Monday)
select mail).Count();
// Where kan hier ook, maar dan krijg je potentiëel meerdere mails terug als ze op exact hetzelfde moment zijn toegekomen, daarom First (geeft enkel het eerste resultaat terug)
Email recentsteEmail = emails.First(mail => mail.Received == emails.Max(mail => mail.Received));
Email recentsteEmailQuerySyntax = (from mail in emails
where mail.Received == (from m in emails select m.Received).Max()
select mail).First();
// gezien emailsVandaag de recentste mails eerst zet, kan je die query ook herbruiken
Email recentsteMailAlternatief = emailsVandaag.First();
}
