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Therefore, learning design patterns, The first thing to do is to understand which aspects of design patterns are available to developers, Then, the principle, timing and method of each design pattern are studied respectively, that is to say, under what circumstances should a certain design pattern be used? When understanding the timing of a certain design pattern, it is also necessary to understand what consequences will be caused if this design pattern is not used at this time. After understanding the principle and usage of each pattern, more importantly, learning the object-oriented thinking mode, after mastering the object-oriented thinking mode, looking back at the design pattern, you will have a deeper understanding. Finally, learning the design pattern, you must study hard and practice more. "I agree with the last sentence very much."　　该片预计投资3000万港币，春节后才能拍竣，上映时间暂定2008年底。We can also specify the number of the new rule when adding the rule, so that we can insert the rule anywhere. We just need to slightly modify the command just now, as follows.黄真面色讪讪的嘀咕两句，也没听清说什么。另一边的山芋可没二姐那么讲道理，小娃儿大喊：这边，这边。妄想特急 中井貴一 中村れい子Jiangsu Province