using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class Employee {
public string birthYear;
public string firstName;
public string lastName;
public static Employee[] GetEmployees() {
Employee[] actors = new Employee[] {
new Employee { birthYear = "1964", firstName = "K", lastName = "R" },
new Employee { birthYear = "1968", firstName = "O", lastName = "W" },
new Employee { birthYear = "1960", firstName = "J", lastName = "S" },
new Employee { birthYear = "1965", firstName = "S",lastName = "B" },
};
return (actors);
}
}
public class MyStringifiedNumberComparer : IEqualityComparer<string> {
public bool Equals(string x, string y) {
return (Int32.Parse(x) == Int32.Parse(y));
}
public int GetHashCode(string obj) {
return Int32.Parse(obj).ToString().GetHashCode();
}
}
public class MainClass {
public static void Main() {
ILookup<string, string> lookup = Employee.GetEmployees()
.ToLookup(k => k.birthYear,a => string.Format("{0} {1}", a.firstName, a.lastName),new MyStringifiedNumberComparer());
IEnumerable<string> actors = lookup["1965"];
foreach (var actor in actors)
Console.WriteLine("{0}", actor);
}
}
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