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Interpreter Pattern: Given a language, the interpreter pattern can define a representation of its grammar and provide an interpreter at the same time. Clients can use this interpreter to interpret sentences in this language. The interpreter pattern will describe how to interpret these statements using pattern design after having a simple grammar. The language mentioned in the interpreter mode refers to any combination that any interpreter object can interpret. In the interpreter mode, a hierarchical structure of command classes representing grammar needs to be defined, that is, a series of combination rules. Each command object has an interpretation method, which represents the interpretation of the command object. Any permutation and combination of objects in the hierarchy of command objects is a language.除掉严嵩父子，人人称快，但事情其实没有任何改善，陛下还是在修殿炼丹，群臣还是抢着送仙桃仙药，不仅是群臣，连东海杨贼都进白鹿了。Since both Redis servers are installed on the Linux operating system, and the two Redis servers will switch when the Master master server fails, it must be ensured that the port numbers of the two Redis servers have been added to the firewall, or the firewalls of the two Linux operating systems have been shut down, otherwise Master-link-Status: down will be prompted, and Master master server is not connected. There are two solutions: the first is to shut down the firewalls of the two Linux operating systems; The second method is to add the port number of each Redis service to the firewall to allow communication through the port number. You can use the command "firewall-cmd-query-port=6379/tcp" first. If the result is No, you can continue to execute the following command "firewall-cmd-add-port=6379/tcp". After the command is executed, you will return Success, indicating that the increase was successful. In this way, Redis servers on the two Linux systems can be switched smoothly to perform sentinel mode operations.Manaca, to put it bluntly, is a subway card. By charging money into the card, you only need to swipe your card when entering or leaving the subway, and you don't need to buy a ticket. In addition, the vending machine in the subway can also use Manaca credit card to pay, which is very convenient.1997年回归前夕，多方势力矛盾激化，暴力事件频发。An ensemble comedy about the meaning of matrimony@HD1TJHulu正式宣布续订艾丽·范宁,尼古拉斯·霍尔特领衔主演的《凯瑟琳大帝》第二季！第二季共10集！