static void Main()
{
//Without taks 20!
//Task 3
var students = new Student[]
{
new Student("Pesho", "Peshov", 18),
new Student("Ivan", "Geshov", 40),
new Student("Stefan", "Popov", 23),
new Student("Ivan", "Peshov", 22)
};
Console.WriteLine("Task 3");
var result = students.FirstBeforeLast();
foreach (var item in result)
{
Console.WriteLine(item.FirstName + " " + item.LastName);
}
Console.WriteLine();
//Task 4
Console.WriteLine("Task 4");
var studentsAge = students.AgeRange();
foreach (var item in studentsAge)
{
Console.WriteLine(item.FirstName + " " + item.LastName);
}
Console.WriteLine();
//Task 5
Console.WriteLine("Task 5");
var orderedStudents = students.Order();
foreach (var item in orderedStudents)
{
Console.WriteLine(item.FirstName + " " + item.LastName);
}
Console.WriteLine();
//Task 6
Console.WriteLine("Task 6");
var array = new int[] { 1, 21, 3, 15, 23 };
array = array.Divisible();
foreach (var number in array)
{
Console.WriteLine("Is divisible by 7 and 3: " + number);
}
Console.WriteLine();
//Task 7
//Console.WriteLine("Task 7");
//Timer timer = new Timer(5);
//timer.InvokeAgain();
//Task 8
//Console.WriteLine("Task 8");
//Timer time = new Timer(5);
//Subscriber sub1 = new Subscriber("Sub1", time);
//Subscriber sub2 = new Subscriber("Sub2", time);
//time.InvokeAgain();
//Task 9 - 10
var otherStudents = new List <Student>()
{
new Student("Pesho", "Peshov", 18, "+359888666111", 121206343, "abv.bg", new List <int>(), 1),
new Student("Ivan", "Geshov", 40, "+359888213611", 140205432, "gmail.com", new List <int>(), 3),
new Student("Stefan", "Popov", 23, "+3598128226111", 12010634, "abv.bg", new List <int>(), 2),
new Student("Ivan", "Peshov", 22, "+3598886612311", 12010823, "abv.bg", new List <int>(), 1)
};
//Adding marks
otherStudents[0].Add(2);
otherStudents[0].Add(6);
otherStudents[1].Add(3);
otherStudents[1].Add(4);
otherStudents[1].Add(3);
otherStudents[2].Add(2);
otherStudents[2].Add(3);
otherStudents[2].Add(6);
otherStudents[3].Add(2);
otherStudents[3].Add(2);
otherStudents[3].Add(3);
Console.WriteLine("Task 9 - 10");
var studsByGroup = otherStudents
.GroupStudents(2)
.OrderBy(x => x.FirstName)
.ToList();
//Do the same with extension methods
//If you try it first comment the above studsByGroup
//var studsByGroup = otherStudents
// .Where(x => x.GroupNumber == 2)
// .OrderBy(x => x.FirstName)
// .ToList();
foreach (var item in studsByGroup)
{
Console.WriteLine(string.Format($"{item.FirstName} {item.LastName} : from group {item.GroupNumber}"));
}
Console.WriteLine();
//Task 11
Console.WriteLine("Task 11");
otherStudents
.GroupByEmail("abv")
.ToList()
.ForEach(x => Console.WriteLine($"{x.FirstName} {x.LastName} contains the searched email: {x.Email}"));
otherStudents
.Where(x => x.Email.Contains("abv"))
.Select(x => $"{x.FirstName} {x.LastName} contains the searched email: {x.Email}")
.ToList()
.ForEach(x => Console.WriteLine(x));
Console.WriteLine();
//Task 12
//Selecting phone numbers by country code
Console.WriteLine("Task 12");
var studsByPhone = otherStudents
.GroupByPhone("+359")
.ToList();
foreach (var student in studsByPhone)
{
Console.WriteLine($"{student.FirstName} {student.LastName}");
}
Console.WriteLine();
//Task 13
Console.WriteLine("Task 13");
var exellentStuds = otherStudents
.Where(x => x.Marks.Contains(6))
.ToList();
var anonymous = new
{
FullName = exellentStuds.Select(x => x.FirstName + " " + x.LastName),
Marks = exellentStuds.Select(x => x.Marks)
};
foreach (var studentName in anonymous.FullName)
{
Console.WriteLine(studentName);
}
Console.WriteLine();
//Task 14
Console.WriteLine("Task 14");
var badStudents = otherStudents
.ExtractStudentWith2(2);
foreach (var student in badStudents)
{
Console.WriteLine($"{student.FirstName} {student.LastName} : Marks: {string.Join(" ", student.Marks)}");
}
Console.WriteLine();
//Task 15
Console.WriteLine("Task 15");
var markCollection = otherStudents.ExtractStudentsFromYear("06");
foreach (var mark in markCollection)
{
Console.WriteLine($"Marks: {string.Join(" ", mark.Marks)}");
}
Console.WriteLine();
//Task 16
var groups = new List <Groups>()
{
new Groups(1, "Mathematics"),
new Groups(2, "Biology"),
new Groups(3, "English")
};
Console.WriteLine("Task 16");
var studentsByDepartment = otherStudents
.Join(groups,
st => st.GroupNumber,
gr => gr.GroupNumber,
(st, gr) => new { Name = st.FirstName + " " + st.LastName, gr.DepartmentName })
.Where(x => x.DepartmentName == "Mathematics");
foreach (var student in studentsByDepartment)
{
Console.WriteLine($"{student.Name} - {student.DepartmentName}");
}
Console.WriteLine();
//Task 17
Console.WriteLine("Task 17");
var text = new string[] { "hello", "CSharp", "OOP" };
Console.WriteLine(text.MaximumLenght());
Console.WriteLine();
//Task 18 - 19
//using Linq
Console.WriteLine("Task 18");
var groupNumCollection = otherStudents
.GroupBy(gr => gr.GroupNumber);
foreach (var group in groupNumCollection)
{
Console.WriteLine("Group " + group.Key);
foreach (var item in group)
{
Console.WriteLine($"{item.FirstName} {item.LastName}");
}
}
Console.WriteLine();
//using Extension method
Console.WriteLine("Task 19");
var groupedCollection = otherStudents;
groupedCollection.GroupByGroupNumber();
}
