Tag：Design pattern
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Time：2019-12-6
In the process of numerical simulation programming, there is a problem: some parameters or physical values are obtained through various operations by other parameters or variables. If the values of these parameters and variables are constants, we will not change them once they are initialized, so the problem becomes very simple, for example: const double […]
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Time：2019-12-3
Design pattern classification There are five kinds of creation pattern: factory method pattern, abstract factory pattern, singleton pattern, builder pattern and prototype pattern. There are seven structural modes: adapter mode, decorator mode, agent mode, appearance mode, bridge mode, combination mode and sharing mode. There are eleven behavioral patterns: strategy pattern, template method pattern, observer pattern, […]
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Time：2019-11-18
The first is:Personal blog: eating without washing dishes Onion model Anyone who has learned or understood the node service framework koa may have heard about the onion model and middleware. Well, it’s the onion, as shown below:Koa encapsulates HTTP through the onion model. Middleware is the onion layer by layer. Here we recommend two articles […]
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Time：2019-11-16
In order to highlight the features of the design pattern as much as possible, the sample code adopts the minimalist code. Try to avoid other code interfering with the understanding of design patterns Definition Abstract factory pattern: provides an interface to create a series of related or interdependent objects without specifying their specific classes.In short, […]
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Time：2019-11-15
In order to highlight the features of the design pattern as much as possible, the sample code adopts the minimalist code. Try to avoid other code interfering with the understanding of design patterns Definition It provides a consistent interface for a group of interfaces in the subsystem. The appearance pattern defines a high-level interface, which […]
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Time：2019-11-8
Generator mode Summary The generator pattern separates the construction of a complex object from its representation, so that the same construction process can create different representations. The main function of generator pattern is to build complex products, and build products step by step in detail, that is to say, generator pattern focuses on solving the […]
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Time：2019-11-6
Preface It’s time to roll up the JS foundation, get familiar with it, and take the offer at ten speed;This paper is not from the traditional way of question and answer, but from the knowledge dimension, in order to form a knowledge networkIncludes functions, arrays, objects, data structures, algorithms, design patterns, and HTTP 1. function […]
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Time：2019-11-5
Responsibility chain mode Summary The responsibility chain pattern is to make multiple objects have the opportunity to process the request, so as to avoid the coupling relationship between the sender and the receiver of the request. Link these objects into a chain and pass the request along the chain until there is an object to […]
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Time：2019-11-4
Combination mode Summary Tree structure is often encountered in projects. It is difficult to manage when the tree structure becomes larger and larger. The composition mode allows you to combine objects into a tree structure to represent the “whole / part” hierarchy. Composition enables customers to work with individual objects and composition of objects in […]
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Time：2019-11-3
In order to highlight the features of the design pattern as much as possible, the sample code adopts the minimalist code. Try to avoid other code interfering with the understanding of design patterns Definition Defines a one to many dependency between objects. When the state of an object changes, all objects that depend on it […]
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Time：2019-11-2
Decorator mode Summary When objects need to add some functions, such as adding validation functions to form components, adding ingredients to coffee, adding scrollbars to windows, etc. at this time, if inheritance is used, many subclasses will be generated, which is not easy to manage, and class explosion will occur when the project is growing […]
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Time：2019-10-31
Summary Before we start the text, let’s consider a question: what’s calledProxy？according toWikipediaDefinition: Proxy (English: proxy), also known as network proxy, is a special network service, which allows a network terminal (generally the client) to make indirect connection with another network terminal (generally the server) through this service. Some network devices such as gateway and […]
