/// <summary>
/// 将 Steque 中的内容移动到栈中。
/// </summary>
private void StequeToStack()
{
while (!steque.IsEmpty())
{
stack.Push(steque.Pop());
}
}
/// <summary>
/// 将两个 Steque 连接。
/// </summary>
/// <param name="s1">第一个 Steque </param>
/// <param name="s2">第二个 Steque （将被删除）</param>
/// <returns></returns>
public static Steque <TItem> Catenation(Steque <TItem> s1, Steque <TItem> s2)
{
if (s1.IsEmpty())
{
s1._first = s2._first;
s1._last = s2._last;
s1._count = s2._count;
}
else
{
s1._last.Next = s2._first;
s1._count += s2._count;
}
return(s1);
}