When writing a templated class, particularly something as potentially widely useful as a generic container, always ask yourself one crucial question: How reusable is my class?

• 当编写一个模板类，尤其是那些可能会像通用容器那样被广泛使用的模板类的时候，不要忘了向你自己提一个关键的问题：我的类的重用性怎样？