/**
* @brief 隨機排列陣列元素
* @param array 陣列物件
*/
public static void RandomShuffle <T>(T[] array)
{
int iCount = array.Length;
while (iCount > 1)
{
iCount--;
Swap(ref array[iCount], ref array[RandObject.Next(iCount + 1)]);
}//while
}
/**
* @brief 隨機排列列表元素
* @param list 列表物件
*/
public static void RandomShuffle <T>(List <T> list)
{
int iCount = list.Count;
int iRand = 0;
while (iCount > 1)
{
iCount--;
iRand = RandObject.Next(iCount + 1);
T v = list[iCount];
list[iCount] = list[iRand];
list[iRand] = v;
}//while
}
/**
* @brief 隨機取得列表內容
* @param dir 列表物件
*/
public static KeyValuePair <K, V> RandomPick <K, V>(Dictionary <K, V> dir)
{
int iRand = RandObject.Next(dir.Count);
int iPos = 0;
foreach (KeyValuePair <K, V> Itor in dir)
{
if (iPos != iRand)
{
++iPos;
}
else
{
return(Itor);
}
}//for
return(new KeyValuePair <K, V>());
}
/**
* @brief 隨機取得列表內容
* @param set 列表物件
*/
public static T RandomPick <T>(HashSet <T> set)
{
int iRand = RandObject.Next(set.Count);
int iPos = 0;
foreach (T Itor in set)
{
if (iPos != iRand)
{
++iPos;
}
else
{
return(Itor);
}
}//for
return(default(T));
}
/**
* @brief 隨機取得列表內容
* @param list 列表物件
*/
public static T RandomPick <T>(List <T> list)
{
return(list.Count > 0 ? list[RandObject.Next(list.Count)] : default(T));
}
