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A group of hikers lost on the Appalachian Trail stumble across an ancient secret that threatens their survival.Everyone else is a shielded word, you are a shielded word, there are too many shielded words, can't chat, the most powerful is that your own design of objects expression map are shielded, such as binoculars and that bread[Collection Value]Now we can override the methods in the parent class Interview in the subclass BaiDuInterview; The code is as follows: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?"他这一去，必定也是往安国去找高凡。