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红椒想着双方语言不通，但名字还是能听懂的，于是放慢声音，笑着对她道：黛丝，我叫红——椒。The policy mode is the packaging of the algorithm, which separates the responsibility of using the algorithm from the algorithm itself and delegates it to different objects. Policy patterns usually wrap a series of algorithms into a series of policy classes. To encapsulate the policy pattern in one sentence is to "encapsulate each algorithm into a different policy class so that they can be interchanged". The following is the structure diagram of the policy mode:那时候跟柳儿娘吵嘴打架就算了不得的大事了，哪像现在，这些糟心事都是她从没听说过的。Know the principle + can change the model details man: read the paper, read the paper, read the paper! Read source code read source code read source code! The source code reading here is not limited to reading the source code of one framework. You can look at other excellent frameworks. For the implementation mechanism of the same layer and the same function, you can think more, summarize more and write more. After a long time, there will definitely be gains. The purpose of reading the paper is to directly obtain the original author's thoughts, avoiding obtaining second-hand thoughts from blog interpretation of the paper. After all, everyone's understanding is different, and it is not necessarily right. Read it first, then look at other understandings, and discuss with Daniel more, thus broadening the thinking./v oom-Insufficient mana.Xiao Wang has invested 500,000 yuan in P2P platform, but his mentality has been well controlled, because this amount is still within the reasonable risk tolerance range for him.Weapon is a weapon; Weapon is a weapon type; ElfWeapon is an Elf weapon; OrcWeapon is a magic weapon.