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Structure and implementation of decorator mode Usually, the function of extending a class is implemented by inheritance. However, inheritance has static characteristics, high coupling, and subclasses will expand with the increase of extended functions. The goal of decorator pattern is to create a wrapper object (i.e. decoration object) to wrap ...

Chapter 9 adapter mode 9.1 basic information Basic introduction (1) Adapter pattern converts the interface of a class into another interface expected by the client. The main purpose is compatibility, so that two classes that cannot work together due to interface mismatch can work together. Its alias is wrapper (2) The adapter mode is a st ...

Strategy mode II DownsampleStrategy Package path: com bumptech. glide. load. resource. bitmap. DownsampleStrategy Indicates the algorithm used when down sampling the image. DownsampleStrategy does not provide any guarantee about the output size. The behavior will vary, depending on the strategy used by the ResourceDecoder and the Android ver ...

Design pattern series: http://aphysia.cn/categories/designpattern The beginning is still like that. Please look down What is the meta model? FlyWeight mode is a kind of structural mode, which is mainly used to reduce the number of created objects, reduce memory consumption and improve performance. Speaking of this, I wonder if you think of poo ...

Factory mode extraction Scene introduction Look at a pizza project: it should be convenient for the expansion of pizza types and maintenance 1. There are many kinds of pizza (such as greenpizza, CheesePizz, etc.) 2. Pizza making includes prepare, bake, cut and box 3. Complete the pizza shop ordering function. (1) Pizza's parent abstract class / ...

1. Introduction to strategy mode Strategy pattern is a behavior pattern and a sharp tool to replace a large number of ifelse. The scenarios it can solve are generally those with similar replaceable behavioral logic algorithms. For example, different types of transactions (credit cards, Alipay, WeChat), the unique ID strategy (UUID, DB self i ...

catalogue preface: Definition and characteristics: Structure and Implementation: give an example: preface: In the real world, many objects do not exist independently, and the behavior change of one object may lead to the behavior change of one or more other objects. For example, when the price of a commodity rises, some businesses will ...

C + + language is famous for its powerful function and super complexity. Many people are still confused after learning for many years. The reason is that C + + language mainly has four programming paradigms: process oriented programming, object-oriented programming, generic programming and functional programming. Each paradigm is already very ...

introduction In the process of interviewing others, the JVM memory model almost needs to be asked, although some people say that these are the interview to build an aircraft carrier and screw up the work. If you want to be a CRUD coder, you can choose not to know this. In the question and answer of JVM memory model, some people can say that o ...

Another solution is to escape with a backslash before the newline character. var-kept: export foo<span class="token operator" style="margin: 0px; padding: 0px; list-style-type: none; border: none; color: rgb(166, 127, 89);">=</span>bar<span class="token punctuation" style="margin: 0px; padding: 0px; list-style-ty ...