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We can see the above code. The code for creating div is very similar to the code for creating iframe. We can now consider separating the common code to make the code completely abstract. We can now write a set of code that is encapsulated in the getInstance function, as follows:泰国的凤凰王子如何追求和守护他自己的爱情呢？香儿道：汪尚书去皇宫了？想了一下又道：那也不要紧，杨侍郎在就好了，他一向跟汪尚书亲近的。Now there is a rule in the INPUT chain that rejects all messages from the 192.168. 1.146 host. If we configure another rule after this rule, the latter rule stipulates that all messages from the 192.168. 1.146 host will be accepted, then will iptables accept messages from the 146 host? Let's try it.The code for creating the object is encapsulated and the specific factory class is instantiated, thus achieving the purpose of encapsulation and instantiation. Encapsulating the code that creates the object in one place can also achieve the purpose of reuse and is more convenient for later maintenance. This also means that when the customer instantiates the object, he will only rely on the interface and not on the specific implementation. Help us to better achieve interface programming rather than implementation, making the code more flexible to cope with future extensions.一座充满梦想机遇的公寓，六位青春个性的怪咖，机缘巧合之下，六位帝欢聚在一起，从此瞬息万变，玩转创业江湖，或温情或爆笑，或神机妙算或脑洞大开，一个个百转千回的励志故事轮番上演，在这个秋季陪你狂玩到底The picture shows Mr. Sun taking a photo with the captain.