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Structural patterns, as the name implies, discuss the structure of classes and objects and are mainly used to deal with the combination of classes or objects. It includes two types, one is class structure pattern, which refers to the combination of interfaces or implementations by inheritance mechanism. The second is the object structure mode, which refers to the realization of new functions by combining objects. It includes adapter mode, bridge mode, decorator mode, combination mode, appearance mode, element mode and agent mode.[Publisher]: Ministry of Labour and Social Security原来不过是把她放到这里来，就象把小朋友放到幼儿园，找一个看管的地方，没有想到这个妹妹给了自己一个惊喜。Return collection.get (pos);Next, the compilation process of JS suffix is described in detail. The actual steps Node.js completes in the process of compiling js files are to wrap the contents of js files head and tail. Take app.js as an example, the wrapped app.js will become the following form:王家不结党、不揽权，他和二弟为官清正，若是皇帝连这样的人家都不能容，大靖该完了。何况河北之地掌控在齐国手中，又有灌婴的十五万大军，随时对河东虎视眈眈。