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).
Basically, made up
The situation in centos7 is slightly different from that in centos6. Let's first talk about how to save iptables rules in centos6.
一段情与恨的转折、一场心与心的较量、一个生与死的决择、一切即将终结却又玄机四起……
杨长帆轻描淡写，扛下了一切。
这个故事发生在英国英格兰林肯郡lincolnshire。
The attacker sends a large number of HTTP messages to the target server through proxy or zombie host, requesting URI (Universal Resource Identifier) related to database operation or other URI that consumes system resources, causing the server to run out of resources and cannot respond to normal requests. For example, HTTP Flood attacks often occur on portal websites. The biggest feature of attacks is to select URIs that consume server CPU or memory resources, such as URIs with database operations.
可以说将要出征的这批人，是新鲜的血液，充满了野心，希望在南海搏出一片天的家伙们。
该剧讲述为了打动丈夫的心而变身摩登女孩的女性成长故事。
Activity monitor is a device that can detect and interfere with traffic to the server. Like firewalls, it is not a necessary device in network routing. A typical monitor, like the ACK disguised firewall/proxy in 7, has an additional capability, that is, if it finds that the SYN packet originates from an attacker source address it knows, it will immediately send the disguised RST packet to the server. Activity monitors are practical because they are cheap and easy to deploy (compared with schemes based on firewalls and input source filtering), and can still protect the entire server network without requiring each server operating system to implement a terminal-based solution.
小葱略安排了一番，就和板栗带着弟妹们守岁玩乐。
少女时代权俞利有望出演韩剧《绑匪-偷走命运》（暂译），首次挑战历史古装剧。 26日，权俞利所属社SM娱乐在接受韩媒采访时表示：权俞利接到韩剧《绑匪-偷走命运》的出演提议，目前正在积极讨论中。据悉，该剧为一部历史剧，讲述生计型绑匪因失误错绑一国翁主，继后展开的波澜壮阔的人生逆转内容。
她感觉身边少年正低头审视她，便仰起脸，看着他的眼睛，先轻唤一声：哥哥……少年对上她纯真的目光，犹豫了一下，微叹了口气，将要问的话吞了回去。
The above package monomer mode can also be changed to the following structure writing:
Badminton court is 13.40 meters long, singles court is 5.18 meters wide, doubles court is 6.10 meters wide, and a net 6.10 meters long and 76 centimeters wide is hung in the middle.
International News Study:
林志勋的离去使赵平凡有机会向鹿安娜表达爱意。他等待了多年，不想放弃这样的机会。然而安娜却难以接受，更何况她心中还有林志勋并一直坚信他还活着。
小灰被他扯得脖子伸老长，几乎不曾断气。
