static void Main()
{
Students[] students = new Students[3];
students[0] = new Students("Boyko", "Borisov", 20);
students[1] = new Students("Sashka", "Vaseva", 60);
students[2] = new Students();
Console.WriteLine("Task 3");
foreach (var student in FirstNameBeforeLast(students))
Console.WriteLine(student);
Console.WriteLine();
Console.WriteLine("Task 4");
foreach (var student in FindStudentFrom18To24(students))
Console.WriteLine(student);
Console.WriteLine();
Console.WriteLine("Task 5");
Students[] studentsByLambda = students.OrderByDescending(x => x.FirstName).ThenByDescending(x => x.LastName).ToArray();
Students[] studentsByLINQ = OrderStudentsLINQ(students);
foreach (var student in studentsByLINQ)
Console.WriteLine(student);
}
//Task 5
public static Students[] OrderStudentsLINQ(Students[] listOfStudents)
{
var ordered = from student in listOfStudents
orderby student.FirstName descending, student.LastName descending
select student;
return ordered.ToArray();
}
// Task 3
public static Students[] FirstNameBeforeLast(Students[] listOfStudents)
{
return listOfStudents.Where(x => x.FirstName.CompareTo(x.LastName) < 0).ToArray();
}
// Task 4
public static Students[] FindStudentFrom18To24(Students[] listOfStudents)
{
return listOfStudents.Where(x => x.Age >= 18 && x.Age <= 24).ToArray();
}