^ অপারেটর - এটি "index from the end" অপারেটর হিসেবে পরিচিত।
এটি একটি ইন্ডেক্স রিটার্ন করে যা সিকোয়েন্স বা কালেকশনের শেষের সাপেক্ষে রিলেটিভ।
এটি শেষের এলিমেন্টগুলো খুঁজে বের করার সবচেয়ে কমপ্যাক্ট এবং সহজ পদ্ধতি পূর্বের মেথডগুলোর তুলনায়।
company.listEmployees[^2].Name = "Employee 2 Name Changed using new Syntax"; company.listEmployees[^5].Name = "Employee 5 Name Changed using new Syntax"; company.listEmployees[^8].Name = "Employee 8 Name Changed using new Syntax";
উদাহরণ
public class Employee
{
public int EmployeeId { get; set; }
public string Name { get; set; }
public string Gender { get; set; }
}
public class Company
{
public List listEmployees;
public Company()
{
listEmployees = new List();
listEmployees.Add(new Employee { EmployeeId = 1, Name = "SS", Gender = "Male" });
listEmployees.Add(new Employee { EmployeeId = 2, Name = "SSS", Gender = "Female" });
listEmployees.Add(new Employee { EmployeeId = 3, Name = "SSSS", Gender = "Male" });
listEmployees.Add(new Employee { EmployeeId = 4, Name = "EE", Gender = "Female" });
listEmployees.Add(new Employee { EmployeeId = 5, Name = "EEEE", Gender = "Female" });
listEmployees.Add(new Employee { EmployeeId = 6, Name = "TTT", Gender = "Male" });
listEmployees.Add(new Employee { EmployeeId = 7, Name = "FFF", Gender = "Male" });
listEmployees.Add(new Employee { EmployeeId = 8, Name = "GGG", Gender = "Male" });
}
public string this[int employeeId]
{
get
{
return listEmployees.FirstOrDefault(x => x.EmployeeId == employeeId).Name;
}
set
{
listEmployees.FirstOrDefault(x => x.EmployeeId == employeeId).Name = value;
}
}
}
class Program
{
public static void Main()
{
Company company = new Company();
Console.WriteLine("Name of Employee with Id = 2: " + company[2]);
Console.WriteLine("Name of Employee with Id = 5: " + company[5]);
Console.WriteLine("Name of Employee with Id = 8: " + company[8]);
System.Console.WriteLine();
Console.WriteLine("Changing names of employees with Id = 2,5,8");
company[2] = "Employee 2 Name Changed";
company[5] = "Employee 5 Name Changed";
company[8] = "Employee 8 Name Changed";
System.Console.WriteLine();
Console.WriteLine("Name of Employee with Id = 2: " + company[2]);
Console.WriteLine("Name of Employee with Id = 5: " + company[5]);
Console.WriteLine("Name of Employee with Id = 8: " + company[8]);
company.listEmployees[^2].Name = "Employee 2 Name Changed using new Syntax";
company.listEmployees[^5].Name = "Employee 5 Name Changed using new Syntax";
company.listEmployees[^8].Name = "Employee 8 Name Changed using new Syntax";
System.Console.WriteLine();
Console.WriteLine("Name of Employee with Id = 2: " + company.listEmployees[^2].Name);
Console.WriteLine("Name of Employee with Id = 5: " + company.listEmployees[^5].Name);
Console.WriteLine("Name of Employee with Id = 8: " + company.listEmployees[^8].Name);
Console.ReadLine();
}
}
আউটপুট
Name of Employee with Id = 2: SSS Name of Employee with Id = 5: EEEE Name of Employee with Id = 8: GGG Changing names of employees with Id = 2,5,8 Name of Employee with Id = 2: Employee 2 Name Changed Name of Employee with Id = 5: Employee 5 Name Changed Name of Employee with Id = 8: Employee 8 Name Changed Name of Employee with Id = 2: Employee 2 Name Changed using new Syntax Name of Employee with Id = 5: Employee 5 Name Changed using new Syntax Name of Employee with Id = 8: Employee 8 Name Changed using new Syntax
