//default String.GetHashCode() can't well spread strings like "1", "2", "3"
public static int BetterHash(String key)
{
uint hash = MurmurHash2.Hash(Encoding.ASCII.GetBytes(key));
return((int)hash);
}
/// <summary>
/// 转为MurmurHash
/// </summary>
/// <param name="str">字符串</param>
/// <returns></returns>
public static uint ToMurmurHash(this string str)
{
return(MurmurHash2.Hash(Encoding.UTF8.GetBytes(str)));
}