public static Student[] firstBeforeLast(Student[] students)
{
var collection = students
.Where(x => x.FirstName.CompareTo(x.LastName)<0)
.ToArray();
return collection;
}
public static Student[] Order(Student[] students)
{
var sorted = students
.OrderByDescending(x => x.FirstName)
.ThenByDescending(x => x.LastName)
.ToArray();
return sorted;
}
public static string[] AgeRange(Student[] students)
{
var names = students
.Where(x => x.Age >= 18 && x.Age <= 24)
.Select(x => x.FirstName+ " "+x.LastName)
.ToArray();
return names;
}
