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| 7.55.1.A class which implements comparison and equality interfaces |
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using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
class Person : IComparable<Person>, IEquatable<Person>, IComparable
{
public string Name;
public int Age;
public string Company;
// Implements IComparable<Person>.CompareTo:
public int CompareTo(Person other)
{
if (other == null)
return -1;
return this.Name.CompareTo(other.Name);
}
// Implements IComparable.CompareTo:
public int CompareTo(object obj)
{
Person p = obj as Person;
return CompareTo(p);
}
// Implements IEquatable<Person>.Equals:
public bool Equals(Person other)
{
return ((IComparable<Person>)this).CompareTo(other) == 0;
}
// Overrides Object.Equals:
public override bool Equals(object obj)
{
Person p = obj as Person;
return Equals(p);
}
}
public class MainClass
{
public static void Main()
{
Person[] people = new Person[3];
people[0] = new Person();
people[0].Name = "S D"; people[0].Age = 20; people[0].Company = "E";
people[1] = new Person();
people[1].Name = "M M"; people[1].Age = 40; people[1].Company = "C";
people[2] = new Person();
people[2].Name = "J D"; people[2].Age = 30; people[2].Company = "T";
foreach (Person p in people)
Console.Write("'{0},{1},{2}'\t", p.Name, p.Age, p.Company);
Console.WriteLine();
Array.Sort(people);
foreach (Person p in people)
Console.Write("'{0},{1},{2}'\t", p.Name, p.Age, p.Company);
}
}
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'S D,20,E' 'M M,40,C' 'J D,30,T'
'J D,30,T' 'M M,40,C' 'S D,20,E' |
| 7.55.IEquatable | | 7.55.1. | A class which implements comparison and equality interfaces | | |
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