public bool Equals(TwoDPoint p)
{
// If parameter is null return false:
if ((object)p == null)
{
return(false);
}
// Return true if the fields match:
return((x == p.x) && (y == p.y));
}
public static void Main(string[] args)
{
TwoDPoint point1 = new TwoDPoint(1, 1);
TwoDPoint point2 = new TwoDPoint(10, 10);
Console.WriteLine("Hash for point1: {0}\tHash for point2: {1}", point1.GetHashCode(), point2.GetHashCode());
TwoDPointWithHash newPoint1 = new TwoDPointWithHash(1, 1);
TwoDPointWithHash newPoint2 = new TwoDPointWithHash(10, 10);
Console.WriteLine("Hash for point1: {0}\tHash for point2: {1}", newPoint1.GetHashCode(), newPoint2.GetHashCode());
Console.ReadKey();
}
public static void Main1(string[] args)
{
TwoDPoint point1 = new TwoDPoint(1, 10);
TwoDPoint point2 = new TwoDPoint(1, 10);
object object1 = (object)point1;
object object2 = (object)point2;
Console.WriteLine(point1.Equals(point2));
Console.WriteLine(point1 == point2);
Console.WriteLine(object1.Equals(object2));
Console.WriteLine(object1 == object2); // false !!!! почему?
Console.ReadLine();
// в чем разница определений методов Equals и == ?
}
public override bool Equals(Object obj)
{
// If parameter is null return false.
if (obj == null)
{
return(false);
}
// If parameter cannot be cast to Point return false.
TwoDPoint p = obj as TwoDPoint;
if ((Object)p == null)
{
return(false);
}
// Return true if the fields match:
return((x == p.x) && (y == p.y));
}
static void Main(string[] args)
{
TwoDPoint point1 = new TwoDPoint(1, 10);
TwoDPoint point2 = new TwoDPoint(1, 10);
Console.WriteLine("Hash for point1: {0}\tHash for point2: {1}", point1.GetHashCode(), point2.GetHashCode());
TwoDPointWithHash newPoint1 = new TwoDPointWithHash(10, 10);
TwoDPointWithHash newPoint2 = new TwoDPointWithHash(1, 1);
Console.WriteLine("Hash for point1: {0}\tHash for point2: {1}", newPoint1.GetHashCode(), newPoint2.GetHashCode());
// уникальных точек будет 2, хотя координаты их одинаковы
Console.WriteLine("TwoDPoint:");
var twoDPointList = new List <TwoDPoint> {
point1, point2
};
var distinctTwoDPointList = twoDPointList.Distinct();
foreach (var point in distinctTwoDPointList)
{
Console.WriteLine("Distinct point: {0}", point);
}
// одна уникальная точка
Console.WriteLine("TwoDPointWithHash:");
var twoDPointWithHashList = new List <TwoDPointWithHash> {
newPoint1, newPoint2
};
var distinctTwoDPointWithHashList = twoDPointWithHashList.Distinct();
foreach (var point in distinctTwoDPointWithHashList)
{
Console.WriteLine("Distinct point: {0}", point);
}
Console.ReadKey();
}
public static void Demo(/*string[] args*/)
{
TwoDPoint point1 = new TwoDPoint(1, 10);
TwoDPoint point2 = new TwoDPoint(1, 10);
Console.WriteLine("Hash for point1: {0}\tHash for point2: {1}", point1.GetHashCode(), point2.GetHashCode());
TwoDPointWithHash newPoint1 = new TwoDPointWithHash(1, 1);
TwoDPointWithHash newPoint2 = new TwoDPointWithHash(10, 10);
Console.WriteLine("Hash for point1: {0}\tHash for point2: {1}", newPoint1.GetHashCode(), newPoint2.GetHashCode());
// уникальных точек будет 2, хотя координаты их одинаковы
//Console.WriteLine("TwoDPointWithHash:"); // Здесь надо изменить заголовок для точек типа TwoDPoint
Console.WriteLine("TwoDPoint:");
var twoDPointList = new List <TwoDPoint> {
point1, point2
};
var distinctTwoDPointList = twoDPointList.Distinct();
foreach (var point in distinctTwoDPointList)
{
Console.WriteLine("Distinct point: {0}", point);
}
// одна уникальная точка
Console.WriteLine("TwoDPointWithHash:");
var twoDPointWithHashList = new List <TwoDPointWithHash> {
newPoint1, newPoint2
};
var distinctTwoDPointWithHashList = twoDPointWithHashList.Distinct();
foreach (var point in distinctTwoDPointWithHashList)
{
Console.WriteLine("Distinct point: {0}", point);
}
}
