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Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.夜晚，被荠迷住的小光向她请求。For example, we often validate forms, such as the registration login dialog box. We need to validate before logging in: for example, there are the following logics:阿莱格拉梦想成为11点钟音乐剧公司的一员，并成为《奇异的星期五》的明星，这部剧多年前曾使她的祖母成圣。Cocó祖母是音乐喜剧界一位在世的传奇人物，她与阿莱格拉的母亲、女儿卡特琳娜有着复杂的关系。当阿莱格拉在家中发现一个神秘的手镯时，她的生活完全改变了。手镯把她带回了1994年，也就是卡特琳娜像她这么大的那一年，她在11点的时候在明星科科的阴影下迈出了第一步。在他事业的巅峰。通过了解母亲和祖母的过去，阿莱格拉不仅有助于愈合创伤，让家人团聚，而且她还将发现，尽管过去无法改变，但仍有很多东西需要从中学习。故事讲述十九世纪末期，正值日本明治维新，人心不安、时局动荡，绅士侦探结城新十郎（福士苍汰）在东京神乐坂崭露头角，曾到海外的他得到警视厅的信赖，成为特命侦探。维新英雄胜海舟的前剑术弟子泉山虎之介一直喜欢在困难的案件中进行推理，却总是被结城耍弄。明治版的福尔摩斯，就此展开了一系列曲折奇妙的推理冒险。From the 19th National Congress to the 20th National Congress is a historical juncture of the "two centennial" goals, so planning the second centennial goal is an important task of the 19th National Congress. The 19th National Congress of the Communist Party of China pointed out that a comprehensive analysis of the international and domestic situation and China's development conditions can be arranged in two stages from 2020 to the middle of this century. In the first stage, from 2020 to 2035, on the basis of building a well-off society in an all-round way, we will strive for another 15 years to basically realize socialist modernization. In the second stage, from 2035 to the middle of this century, on the basis of basically realizing modernization, we will strive for another 15 years to build our country into a prosperous, democratic, civilized, harmonious and beautiful socialist modern power.4? Distributed attack