private static IEnumerable<Student> FirstNameBeforeLast(Student[] studentsArray)
{
var result = studentsArray
.Where(st => st.FirstName.CompareTo(st.LastName) < 0)
.ToArray();
return result;
}
private static void FindStudentsWithAgeBetween18And24(Student[] studentsArray)
{
var result = studentsArray
.Where(st => ((st.Age > 18) && (st.Age < 24)))
.ToArray();
foreach (Student student in result)
{
Console.WriteLine(student.FirstName + " " + student.LastName);
}
}
static void Main()
{
Student[] students = new Student[]
{
new Student("Ivan", "Petrov", 32),
new Student("George", "Ivanov", 22),
new Student("Stamat", "Angelov", 19),
new Student("Pesho", "Todorov", 23),
new Student("Gosho", "Andreev", 25),
new Student("Ivan", "Kolev", 26)
};
//Using Lambda Expretions
var result = students
.Where(s => s.FirstName.CompareTo(s.LastName) < 0)
.Select(s => s);
foreach (Student student in result)
{
Console.WriteLine(student);
}
Console.WriteLine();
Console.WriteLine();
Console.WriteLine();
//Using LINQ
var output =
from student in students
where student.FirstName.CompareTo(student.LastName) < 0
select student;
foreach (Student student in output)
{
Console.WriteLine(student);
}
}
private static Student[] SortStudentNames(Student[] students)
{
Student[] sortedArray = students.Where(s => string.Compare(s.FirstName, s.LastName) < 0).ToArray();
return sortedArray;
}
