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(未完待续……) show_style();。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."More literal, more literalIndependent Attack +46Linear light mode. If the brightness of the upper color (light source) is higher than that of neutral gray (50% gray), the picture is brightened by increasing the brightness, and the picture is darkened by decreasing the brightness.　　《校长》：60年代，社会清贫，但求学者众。一位执笔忘饭的校长与善良淡雅的王老师让一座天台学校成为童年岁月里最温暖的家。