理学 设计模式 释 visitor pattern 访问者模式 描述在一个对象结构中对某个对象元素需要执行的操作一种设计模式，使用该模式可以在不改变被操作元素的类的前提下定义作用于这些元素的新操作。
软件工程 释文 visitor pattern 访问者模式
- Xianshan Yilao Club
- Xi'an Shi
- Xianshou sect
- Xianshuigou River
- Xianshui River
- Xi'an Small Wild Goose Pagoda
- Xian Suo Qiang opera singing style system
- Xian Suo Shisan Tao of strings music Qupai suitese
- Xi'an Tang Dynasty Hanguang Gate Museum
- Xiantao High-Technology Industrial Development Zone
- Xiantao Shi
- Xi'an Thermal Power Research Institute Co., Ltd.
- Xiantong Si
- Xiantong Temple
- Xiantouling
- Xi' an Training Center of China Museums Association
- Xi'an University of Posts and Telecommunications
- Xi'an wind and drum music
- Xianxialing Shanmai
- Xian Xian
- Xi'an-Xianyang Xinqu
- Xi'an Xicang Gong and Drum Ensemble
- Xian Xinghai
- Xi'an Xingqing Palace Park
- Xian Y-20