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　　因为齐健的到来，让本来松散，各顾各的夜市，团结了起来。通过他们将老百姓喜好的，所谓的“暗黑料理”发扬光大，打造成最具烟火气息的饕餮盛宴。Visitor mode is to encapsulate some operations applied to a certain data structure. Once these operations need to be modified, the data structure that accepts this operation can be saved unchanged. Visitor mode is suitable for systems with relatively stable data structures. It reduces the coupling degree between data structures and operations acting on data structures, making the set of operations relatively free to change. The specific structure diagram is as follows:We know that for the above code, Xiao Hong subscribes to shoeObj, an object that buys shoes, but if we need to subscribe to buying houses or other objects in the future, we need to copy the above code and change the object code inside again. For this reason, we need to encapsulate the code.Fire emergency韩国BL新剧 #ColorRush# 要来啦，预计年末全球首播！讲述的是主人公因为是色盲看到的整个世界都是灰色的，但是遇到命中注定的他之后通过强烈的经历开始出现能看到彩色的“Color Rush”现象，从而发生的一系列故事。