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外婆又特特地拿出这柄如意，说自己子孙满堂，也算有福，希望把这福气传给孙子和孙媳妇。The policewoman was very calm: "My mother also invested 200,000 yuan. I can't get it back."Magic Attack +25 (Online +30)Visitor pattern decouples the data structure from the operations acting on the structure, making the operation set relatively free to evolve. Visitor pattern is suitable for systems with relatively stable data structure and easy change of algorithm. Because visitor mode makes it easy to increase algorithm operation. If system data structure objects are easy to change and new data objects are often added, visitor mode is not suitable. The advantage of visitor mode is that it is easy to add operations, because adding operations means adding new visitors. Visitor mode centralizes the relevant behaviors into one visitor object, and its changes do not affect the system data structure. Its disadvantage is that it is difficult to add new data structures. -From Encyclopedia洛蒂是个无可救药的浪漫主义者，然而当自私的妹妹突然宣布订婚，她梦想中的完美婚礼计划付诸东流，人生也天翻地覆。　　江小夏起初对春梅内疚的喜欢，后来因为陈恭的搅入以及和苏雨晴的搭戏，逐渐对苏雨晴产生了好感，而在后来柳芸芸情感逐渐变得活泼后，又情不自禁的和柳芸芸变成了冤家。 　　Back to Shidao Pier