Generics C#

Sort a List with a Comparison Function

This C# program demonstrates how to sort a list with a comparison function.

Program.cs

using System;
using System.Collections.Generic;


namespace XoaX {

    public class CChristianMartyr {
        public string msName;
        public int miYearOfMartyrdom;
        // Constructor
        public CChristianMartyr(string sName, int iYearOfMartyrdom) {
            msName = sName;
            miYearOfMartyrdom = iYearOfMartyrdom;
        }
    }

    class Program {
        static void Main(string[] args) {
            List<CChristianMartyr> qMartyrs = new List<CChristianMartyr>();
            qMartyrs.Add(new CChristianMartyr("Saint Julian", 250));
            qMartyrs.Add(new CChristianMartyr("Saint Lorenzo Ruiz", 1637));
            qMartyrs.Add(new CChristianMartyr("Saint Apollonius", 305));
            qMartyrs.Add(new CChristianMartyr("Saint Justin Martyr", 165));
            qMartyrs.Add(new CChristianMartyr("Saint Laura", 864));
            qMartyrs.Add(new CChristianMartyr("Saint John Boste", 1594));
            qMartyrs.Add(new CChristianMartyr("Saint Flavius", 300));

            Console.WriteLine("Unsorted:");
            Console.WriteLine("---------");
            foreach (CChristianMartyr qMartyr in qMartyrs) {
                Console.WriteLine(qMartyr.msName + " was martyred in " +
                    qMartyr.miYearOfMartyrdom + " AD");
            }
            Console.WriteLine("");

            // Sort the list using an inline delegate based on the name
            qMartyrs.Sort(delegate(CChristianMartyr qM1, CChristianMartyr qM2) {
                if (qM1.msName == null && qM2.msName == null) return 0;
                else if (qM1.msName == null) return -1;
                else if (qM2.msName == null) return 1;
                else return qM1.msName.CompareTo(qM2.msName);
            });

            Console.WriteLine("Sorted by name:");
            Console.WriteLine("---------------");
            foreach (CChristianMartyr qMartyr in qMartyrs) {
                Console.WriteLine(qMartyr.msName + " was martyred in " +
                    qMartyr.miYearOfMartyrdom + " AD");
            }
            Console.WriteLine("");
        }
    }

}
 

Output

Unsorted:
---------
Saint Julian was martyred in 250 AD
Saint Lorenzo Ruiz was martyred in 1637 AD
Saint Apollonius was martyred in 305 AD
Saint Justin Martyr was martyred in 165 AD
Saint Laura was martyred in 864 AD
Saint John Boste was martyred in 1594 AD
Saint Flavius was martyred in 300 AD

Sorted by name:
---------------
Saint Apollonius was martyred in 305 AD
Saint Flavius was martyred in 300 AD
Saint John Boste was martyred in 1594 AD
Saint Julian was martyred in 250 AD
Saint Justin Martyr was martyred in 165 AD
Saint Laura was martyred in 864 AD
Saint Lorenzo Ruiz was martyred in 1637 AD

Press any key to continue . . .
 
 

© 2007–2024 XoaX.net LLC. All rights reserved.