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();
}
static void Main(string[] args)
{
Vector <int> vector = null;
string result = "";
// test 1
try
{
Console.WriteLine("\nTest A: Create a new vector by calling 'Vector<int> vector = new Vector<int>(50);'");
vector = new Vector <int>(50);
Console.WriteLine(" :: SUCCESS");
result = result + "A";
}
catch (Exception exception)
{
Console.WriteLine(" :: FAIL");
Console.WriteLine(exception.ToString());
result = result + "-";
}
// test 2
try
{
Console.WriteLine("\nTest B: Add a sequence of numbers 2, 6, 8, 5, 5, 1, 8, 5, 3, 5");
vector.Add(2); vector.Add(6); vector.Add(8); vector.Add(5); vector.Add(5); vector.Add(1); vector.Add(8); vector.Add(5); vector.Add(3); vector.Add(5);
if (!CheckIntSequence(new int[] { 2, 6, 8, 5, 5, 1, 8, 5, 3, 5 }, vector))
{
throw new Exception("Vector stores an incorrect sequence of integers");
}
Console.WriteLine(" :: SUCCESS");
result = result + "B";
}
catch (Exception exception)
{
Console.WriteLine(" :: FAIL");
Console.WriteLine(exception.ToString());
result = result + "-";
}
// test 3
try
{
Console.WriteLine("\nTest C: Run a sequence of operations: ");
Console.WriteLine("Find number that is greater than 3 and less than 7, i.e. 'e => e > 3 && e < 7'");
if (vector.Find(e => e > 3 && e < 7) == 6)
{
Console.WriteLine(" :: SUCCESS");
}
else
{
throw new Exception("The right number is 6");
}
Console.WriteLine("Find number that is either 10 or 8, i.e. 'e => e == 10 || e == 8'");
if (vector.Find(e => e == 10 || e == 8) == 8)
{
Console.WriteLine(" :: SUCCESS");
}
else
{
throw new Exception("The right number is 8");
}
Console.WriteLine("Find number that is not 2, i.e. 'e => e != 2'");;
if (vector.Find(e => e != 2) == 6)
{
Console.WriteLine(" :: SUCCESS");
}
else
{
throw new Exception("The right number is 6");
}
Console.WriteLine("Find number that is greater than 20, i.e. 'e => e > 20'");;
if (vector.Find(e => e > 20) == 0)
{
Console.WriteLine(" :: SUCCESS");
}
else
{
throw new Exception("There is no such number. The right number is 0 as zero is the 'default(T)' value for type 'int'");
}
Console.WriteLine("Find the first odd number, i.e. 'e => (e % 2) == 1'");;
if (vector.Find(e => (e % 2) == 1) == 5)
{
Console.WriteLine(" :: SUCCESS");
}
else
{
throw new Exception("The right number is 5");
}
Console.WriteLine("Find the number that is divided by 11 without remainder, i.e. 'e => (e % 11) == 0'");
if (vector.Find(e => (e % 11) == 0) == 0)
{
Console.WriteLine(" :: SUCCESS");
}
else
{
throw new Exception("There is no such number. The right number is 0 as zero is the 'default(T)' value for type 'int'");
}
result = result + "C";
}
catch (Exception exception)
{
Console.WriteLine(" :: FAIL");
Console.WriteLine(exception.ToString());
result = result + "-";
}
// test 4
try
{
Console.WriteLine("\nTest D: Find the minimum of the sequence");
int min = vector.Min();
if (min != 1)
{
throw new Exception(min + " is an invalid minimum number of the sequence");
}
Console.WriteLine(" :: SUCCESS");
result = result + "D";
}
catch (Exception exception)
{
Console.WriteLine(" :: FAIL");
Console.WriteLine(exception.ToString());
result = result + "-";
}
// test 5
try
{
Console.WriteLine("\nTest E: Find the maximum of the sequence");
int max = vector.Max();
if (max != 8)
{
throw new Exception(max + " is an invalid maximum number of the sequence");
}
Console.WriteLine(" :: SUCCESS");
result = result + "E";
}
catch (Exception exception)
{
Console.WriteLine(" :: FAIL");
Console.WriteLine(exception.ToString());
result = result + "-";
}
// test 6
try
{
Console.WriteLine("\nTest F: Find all numbers that are greater than 3 and less than 7, i.e. 'e => e > 3 && e < 7'");
if (!CheckIntSequence(new int[] { 6, 5, 5, 5, 5 }, vector.FindAll(e => e > 3 && e < 7)))
{
throw new Exception("Operation returns an incorrect sequence of integers");
}
Console.WriteLine(" :: SUCCESS");
result = result + "F";
}
catch (Exception exception)
{
Console.WriteLine(" :: FAIL");
Console.WriteLine(exception.ToString());
result = result + "-";
}
// test 7
try
{
Console.WriteLine("\nTest G: Find all numbers that is either 10 or 8, i.e. 'e => e == 10 || e == 8'");
if (!CheckIntSequence(new int[] { 8, 8 }, vector.FindAll(e => e == 10 || e == 8)))
{
throw new Exception("Operation returns an incorrect sequence of integers");
}
Console.WriteLine(" :: SUCCESS");
result = result + "G";
}
catch (Exception exception)
{
Console.WriteLine(" :: FAIL");
Console.WriteLine(exception.ToString());
result = result + "-";
}
// test 8
try
{
Console.WriteLine("\nTest H: Find all odd numbers, i.e. 'e => (e % 2) == 1'");
if (!CheckIntSequence(new int[] { 5, 5, 1, 5, 3, 5 }, vector.FindAll(e => (e % 2) == 1)))
{
throw new Exception("Operation returns an incorrect sequence of integers");
}
Console.WriteLine(" :: SUCCESS");
result = result + "H";
}
catch (Exception exception)
{
Console.WriteLine(" :: FAIL");
Console.WriteLine(exception.ToString());
result = result + "-";
}
// test 9
try
{
Console.WriteLine("\nTest I: Find all odd numbers that are divided by 11 without remainder, i.e. 'e => (e % 11) == 0'");
if (!CheckIntSequence(new int[] { }, vector.FindAll(e => (e % 11) == 0)))
{
throw new Exception("Operation returns an incorrect sequence of integers");
}
Console.WriteLine(" :: SUCCESS");
result = result + "I";
}
catch (Exception exception)
{
Console.WriteLine(" :: FAIL");
Console.WriteLine(exception.ToString());
result = result + "-";
}
// test 10
try
{
Console.WriteLine("\nTest J: Remove all even numbers, i.e. 'e => (e % 2) == 0'");
int check = vector.RemoveAll(e => (e % 2) == 0);
if (check != 4)
{
throw new Exception(check + " is a wrong number of removed integers");
}
if (!CheckIntSequence(new int[] { 5, 5, 1, 5, 3, 5 }, vector))
{
throw new Exception("Vector stores an incorrect sequence of integers");
}
Console.WriteLine(" :: SUCCESS");
result = result + "J";
}
catch (Exception exception)
{
Console.WriteLine(" :: FAIL");
Console.WriteLine(exception.ToString());
result = result + "-";
}
Console.WriteLine("\n\n ------------------- SUMMARY ------------------- ");
Console.WriteLine("Tests passed: " + result);
Console.ReadKey();
}