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B) Design principles. Many people have listed seven principles, such as single duty principle, opening and closing principle, Richter substitution principle, dependence inversion principle, interface isolation principle, composite reuse principle and Dimit principle. LSP, I elevated it to one of the three cornerstones of the object-oriented paradigm; Single responsibility and interface isolation are mainly used as the principle of responsibility division in object-oriented analysis/OOA, which you can not pay much attention to at this time. Relying on the inversion principle, I throw it away as garbage, because the opening and closing principle or directly "relying on abstract type principle" already contains the essence of relying on the inversion principle, while the dross of relying on the inversion principle is inherited by IoC. Of course, the pullback, I emphasize very much. Therefore, you need to master the abstract dependency principle (OCP), one-way dependency principle (including the learning of callbacks) and the minimum dependency principle (composite reuse principle, Dimit rule).A make more components when modeling, so if there is a problem, only one component will be modified, and the rest of the copied components will be automatically modified in association, mainly for multiple copied windows, doors and the like.该剧讲述了三个不同家庭的男孩子，从不羁少年成长为真正男子汉，在迷失和沉沦中寻找尊严，友情，亲情和爱情的励志故事After proxy!　　周平的老伴去世后，次子和夫，女儿路子和他一起生活。周平没有那种爱唠叨的毛病。他经常和中学时代的朋友河合秀三和崛江晋一起饮酒叙谈，自得其乐。偶尔，他们也谈起周平的女儿路子的婚姻。周平却因为路子对自己的照料十分周到，而舍不得女儿离开自己。现在他好想吃哩。本片以近年来发生的十二起影响特别重大、案情复杂、侦破难度极大并成功侦破的刑事案件为背景，以纪实的风格、艺术地再现扑朔迷离，惊心动魄的侦查缉捕过程。《觅迹追踪》为“新警事”系列的第三部作品，该片集成了前两部快节奏、高密度的情节安排等特点，完全将美剧风格发挥的淋漓尽致，使其形成一涉案系列剧品牌。阀门厂老板周成龙失踪一天后，被人发现死在上村路一幢住宅内。死者的弟弟在案发后不知所踪，嫌疑重大。副队长诸葛智在案情调查中发现，死者刚离异的妻子周丽芳竟是自己的初恋女友，没想到婚后大款丈夫并没有给她带来几天的幸福。诸葛智认为此案情杀、仇杀的可能性极大，而队长陈海涛认为死者弟弟背后的那帮赌徒不仅有作案动机，也具备作案条件。对此，两种意见各执一词。红鼻子等赌徒被从广东捉拿回本市后，破案心切的王大鹏因刑讯逼供而被检察机关立案查处。经过两个多月的艰苦侦查，扑朔迷离的案情终于大白于天下，杀人凶手以及幕后主谋被缉拿归案……