设计才是真正的编程！ 对类型的设计才是设计！ 面向对象并非一切？ 无论你以为上述观点是惊天大秘或不过尔尔，你都需要这本书！-Design is the real programming! On the type of design is the design! Not all object-oriented? Whether you think this view is a terrible secret, or merely mediocre, you need this book