如何在c#中散列int []
我想从Vector2 []中调用时重写GetHashCode()方法。 这段代码为我知道的对象生成非唯一散列:我将下面的类传递给同一个矩形,并生成不同的散列码。
public Shape(Rectangle r)
{
edges = new Vector2[4];
edges[0] = new Vector2(0, 0);
edges[1] = new Vector2(r.Width, 0);
edges[2] = new Vector2(r.Width, r.Height);
edges[3] = new Vector2(0, r.Height);
Console.Write(edges.GetHashCode() + "n");
Position = new Vector2(r.X, r.Y);
}
Vector2数组只是一堆整数。 我怎样才能创建一个唯一的整数列表的整数?
你可以使用这样的东西:
public static int CombineHashCodes(params int[] hashCodes)
{
if (hashCodes == null)
{
throw new ArgumentNullException("hashCodes");
}
if (hashCodes.Length == 0)
{
throw new IndexOutOfRangeException();
}
if (hashCodes.Length == 1)
{
return hashCodes[0];
}
var result = hashCodes[0];
for (var i = 1; i < hashCodes.Length; i++)
{
result = CombineHashCodes(result, hashCodes[i]);
}
return result;
}
private static int CombineHashCodes(int h1, int h2)
{
return (h1 << 5) + h1 ^ h2;
// another implementation
//unchecked
//{
// var hash = 17;
// hash = hash * 23 + h1;
// hash = hash * 23 + h2;
// return hash;
//}
}
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