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田遥听了愕然。史蒂芬·金与J·J·艾布拉姆斯再度携手，打造Hulu新剧《城堡石》(Castle Rock，暂译)。该剧会把史蒂芬·金数部小说及短篇故事集中在一个背景地点展现，预热先导预告也同时发布。尚不知道该剧会以独立故事构成，还是会用不同作品串联成一个完整故事。The factory class mode provides a mode to create a single class, while the builder mode is to centralize and manage various products to create composite objects. The so-called composite objects refer to a class with different attributes. In fact, the builder mode is obtained by combining the previous abstract factory mode with the final Test. Let's look at the code:Aunt Wang stamped her feet in regret: "I would have bought the genuine product if I had known it." This is the thinking of the poor-ignoring the "iceberg cost". What is iceberg cost? Even the visible cost is often only a very small part. The greater cost is hidden under invisible water.那婆子却不依起来，赖在地上喊道：这路也是张家的？咋不让人走了？还有没有王法了？板栗大怒：万家的事，他不好明着插手，再说，那婆子明显存了卑劣心思，可是，若是辱及张家，就别怪他不客气了。泥鳅娘忙道：这不关小葱和淼淼的事，是那个胡少爷太霸道。3. Some types, such as the core trading engine of the exchange, control the trading process. If multiple types can be created, the system will be completely chaotic. (For example, if there are multiple commanders in an army who command at the same time, there will definitely be a mess), so only by using the singleton mode can the core transaction server independently control the whole process. The following is an analysis of some examples that we need to pay attention to when applying singleton pattern in the development process.