亚洲欧美中文日韩v在线

This appearance is familiar.The process of solving crimes:After understanding the history and classification of design patterns, how should we learn design patterns? Before learning the design pattern, readers must establish a kind of consciousness, that is, the design pattern is not only a method and technology, but also an idea and a methodology. It has nothing to do with the specific language. The main purpose of learning design patterns is to establish object-oriented ideas, program to the interface as much as possible, with low coupling and high cohesion, so that the programs you design can be reused as much as possible. "Specious. Learning design patterns can better understand object-oriented ideas. Design patterns are some design skills and tricks. Don't rise to ideas and methodologies, okay?"Penglai Mountain, located in the northwest of Anxi County, was founded in the Northern Song Dynasty and has been serving as one of China's 100 immortals, Qingshui Patriarch for more than 950 years. It is a national 4A scenic spot and a well-known pilgrimage destination at home and abroad. Qingshui Rock is the only rock temple in the country with a "emperor" shaped structure. The pavilions and halls in the scenic spot are majestic and magnificent, the water and mountains are beautiful and magical, and cultural relics and historic sites are scattered all over the country. Among the existing cultural relics and historic sites, there are 29 in the Song Dynasty, 1 in the Yuan Dynasty, 8 in the Ming Dynasty, 5 in the Qing Dynasty and 23 in modern times. Together with the natural landscape created by heaven, it constitutes a fascinating "Penglai Wonderland". Qingshui Rock Inscriptions and Cliff Inscriptions involve Song, Yuan, Ming, Qing and even modern times. Among them, the "Rock Map" tablet in Song Dynasty is the most precious and is a provincial protected cultural relic.