public static void Run()
{
const string student_names_file = "Names.txt";
var file_with_names = new FileInfo(student_names_file);
var rnd = new Random();
var dekanat = new Dekanat();
for (var i = 0; i < 10; i++)
{
dekanat.Add(new StudentsGroup {
Name = $"Группа {i + 1}"
});
}
foreach (var line in file_with_names.GetLines())
{
if (string.IsNullOrWhiteSpace(line))
{
continue;
}
var components = line.Split(' ');
if (components.Length < 3)
{
continue;
}
var student = new Student
{
LastName = components[0],
FirstName = components[1],
Patronimyc = components[2],
Ratings = rnd.GetRandomIntValues(20, 3, 6).ToList()
};
dekanat.Add(student);
}
//IEnumerable<Student> students_enum = dekanat;
//IQueryable<Student> student_query = students_enum.AsQueryable();
//foreach (var i in Enumerable.Range(0, 100))
//{
//}
//for (var i = 0; i < 100; i++)
//{
//}
//var simple_studetns = Enumerable.Range(1, 100)
// .Select(i => new Student { FirstName = $"Student {i}" })
// //.ToArray()
// ;
//foreach (var student in simple_studetns)
// Console.WriteLine(student);
var best_students = dekanat.Where(student => student.AverageRating >= 4);
var last_students = dekanat.Where(student => student.AverageRating < 4);
foreach (var best_student in best_students)
{
Console.WriteLine(best_student);
}
//Console.ReadLine();
foreach (var last_student in last_students)
{
Console.WriteLine(last_student);
}
var best_count = best_students.Count();
var last_count = last_students.Count();
//var names_lengths = file_with_names.GetLines()
// .Select(str => str.Split(' '))
// .Select(strs => new KeyValuePair<string, int>(strs[1], strs[1].Length))
// .Where(v => v.Value > 4)
// .OrderBy(v => v.Value)
// .Sum(v => v.Key.Length);
IEnumerable <Student> students = dekanat;
IEnumerable <StudentsGroup> groups = dekanat.Groups;
var students_groups = students.Join(
groups,
stud => stud.GroupId,
group => group.Id,
(stud, group) => new { Student = stud, Group = group })
.Where(s => s.Student.AverageRating > 4);
foreach (var students_group in students_groups)
{
Console.WriteLine("{0} == {1}", students_group.Student, students_group.Group);
}
var students_groups_dict = students_groups.GroupBy(g => g.Group.Name)
.ToDictionary(g => g.Key, g => g.Select(v => v.Student.LastName).ToArray());
}
public static void Run()
{
const string student_name = "Names.txt";
var file_with_name = new FileInfo(student_name);
var rnd = new Random();
var dekanat = new Dekanat();
for (var i = 0; i < 10; i++)
{
dekanat.Add(new StudentsGroup {
Name = $"Group {i + 1}"
});
}
foreach (var line in file_with_name.GetLines())
{
if (string.IsNullOrEmpty(line))
{
continue;
}
var components = line.Split(' ');
if (components.Length < 2)
{
continue;
}
var student = new Student
{
LastName = components[0],
FirstName = components[1],
Ratings = rnd.GetRandomIntValues(20, 3, 6).ToList()
};
dekanat.Add(student);
}
//IEnumerable<Student> students_enum = dekanat;
//IQueryable<Student> students_query = students_enum.AsQueryable();
//var sStudents = Enumerable.Range(1, 100)
// .Select(i => new Student
// {
// FirstName = $"Student {i}"
// });
//foreach(var student in sStudents)
//{
// Console.WriteLine(student);
//}
var bStudents = dekanat.Where(s => s.AvgRating > 4);
foreach (var bs in bStudents)
{
Console.WriteLine(bs);
}
var bCount = bStudents.Count();
bStudents = dekanat.Where(s => s.AvgRating < 4);
foreach (var bs in bStudents)
{
Console.WriteLine(bs);
}
var lCount = bStudents.Count();
Console.WriteLine("{0} {1}", bCount, lCount);
//var nameLengths = file_with_name.GetLines()
// .Select(str => str.Split(' '))
// .Select(strs => new KeyValuePair<string , int>(strs[1], strs[1].Length))
// .Where(v => v.Value > 4)
// .OrderBy(v => v.Value)
// .ToArray();
IEnumerable <Student> students = dekanat;
IEnumerable <StudentsGroup> groups = dekanat.Groups;
var students_groups = students
.Join(
groups,
stud => stud.GroupId,
grp => grp.Id,
(stud, grp) => new { Student = stud, Group = grp }
)
.Where(s => s.Student.AvgRating > 4);
foreach (var stdGrp in students_groups)
{
Console.WriteLine("{0} == {1}", stdGrp.Student, stdGrp.Group);
}
var students_group_dict = students_groups
.GroupBy(
g => g.Group.Name
)
.ToDictionary(
g => g.Key,
g => g.Select(v => v.Student.LastName));
}
public static void Run()
{
const string student_names_file = "names.txt";
var file_with_names = new FileInfo(student_names_file);
var rnd = new Random();
var dekanat = new Dekanat();
for (int i = 0; i < 10; i++)
{
dekanat.Add(new StudentsGroup {
Name = $"Группа {i + 1}"
});
}
foreach (var line in file_with_names.GetLines())
{
if (string.IsNullOrWhiteSpace(line))
{
continue;
}
var components = line.Split(' ');
if (components.Length < 3)
{
continue;
}
var student = new Student
{
LastName = components[0],
FirstName = components[1],
Patronimyc = components[2],
Rating = rnd.GetRandomIntValues(10, 3, 6).ToList()
};
dekanat.Add(student);
}
#region Enumerable.Range(1, 100)
/*
* // перечисления студентов. можно работать с перечислениями.
* IEnumerable<Student> students_enum = dekanat;
* // поддерживает запросы к себе. Оба интерфейсы.
* IQueryable<Student> students_query = students_enum.AsQueryable();
*
* // равносильные записи. Но основное предназначение Enumerable.Range() другое
* foreach (var i in Enumerable.Range(0, 100))
* {
* }
* for (int i = 0; i < 100; i++)
* {
* }
*
* var simple_students = Enumerable.Range(1, 100)
* .Select(i => new Student { FirstName = $"Student {i}" })
* .ToArray() ; // получили объект перечисления студентов
*
* foreach (var students in simple_students)
* {
* Console.WriteLine(students);
* }
*/
#endregion
var best_students = dekanat.Where(student => student.AverageRating > 4);
var loser_students = dekanat.Where(student => student.AverageRating < 4);
foreach (var best_student in best_students)
{
Console.WriteLine(best_student);
}
foreach (var losers in loser_students)
{
Console.WriteLine(losers);
}
// подсчет хорошистов и лузеров
var best_count = best_students.Count();
var loser_count = loser_students.Count();
#region .Select Where OrderBy Sum
/*
* // var автоматическая типизация
* var names_length = file_with_names.GetLines()
* .Select(str => str.Split(' ')) // разделили по пробелу
* .Select(strs => new KeyValuePair<string, int>(strs[1], strs[1].Length)) // выбрали второй элемент (имя)
* .Where(v => v.Value > 4) // выбрали те что больше 4 фильтрация
* .OrderBy(v => v.Value) // отсортировали
* .Sum(v => v.Key.Length);
*/
#endregion
IEnumerable <Student> students = dekanat;
IEnumerable <StudentsGroup> groups = dekanat.Groups;
var students_groups = dekanat.Join(
groups,
stud => stud.GroupId,
group => group.Id,
(stud, group) => new { Student = stud, Group = group })
.Where(s => s.Student.AverageRating > 4);
foreach (var students_group in students_groups)
{
Console.WriteLine($"{students_group.Student} == {students_group.Group}");
}
var students_group_dict = students_groups.GroupBy(g => g.Group.Name)
.ToDictionary(g => g.Key, g => g.Select(v => v.Student.LastName).ToArray());
}
public static void Run()
{
const string student_names_file = "Names.txt";
var file_with_names = new FileInfo(student_names_file);
var rnd = new Random();
var dekanat = new Dekanat();
for (var i = 0; i < 10; i++)
{
dekanat.Add(new StudentsGroup {
Name = $"Группа {i + 1}"
});
}
foreach (var line in file_with_names.GetLines())
{
if (string.IsNullOrWhiteSpace(line))
{
continue;
}
var components = line.Split(' ');
if (components.Length < 3)
{
continue;
}
var student = new Student
{
LastName = components[0],
FirstName = components[1],
Patronymic = components[2],
Ratings = rnd.GetRandomIntValues(20, 3, 5).ToList()
};
dekanat.Add(student);
}
//IEnumerable<Student> students_enum = dekanat;
//IQueryable<Student> student_query = students_enum.AsQueryable();
//foreach(var i in Enumerable.Range(0, 100))
//{
//}
//for(var i = 0; i < 100; i++)
//{
//}
//var simple_students = Enumerable.Range(1, 100)
// .Select(i => new Student { FirstName = $"Student {i}" });
//foreach (var student in simple_students)
// Console.WriteLine(student);
var best_students = dekanat.Where(student => student.AverageRating >= 4);
var last_students = dekanat.Where(student => student.AverageRating < 4);
foreach (var best_student in best_students)
{
Console.WriteLine(best_students);
}
foreach (var last_student in last_students)
{
Console.WriteLine(best_students);
}
var best_count = best_students.Count();
var last_count = last_students.Count();
var names_lengths = file_with_names.GetLines()
.Select(str => str.Split(' '))
.Select(strs => new KeyValuePair <string, int>(strs[1], strs[1].Length))
.Where(v => v.Value > 4)
.OrderBy(v => v.Value)
.ToArray();
}