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Command mode 1 Definition Encapsulating a request as an object separates the responsibility of sending the request from the responsibility of executing the request, so that the two communicate through the command object, which is convenient for storing, transmitting, calling, adding and managing the command object. 2 Structure The command m ...

Finally, I finished the exam and was able to find some time to write a blog (although I was still worried about my computer performance). I really have nothing to say. The front is nonsense. Enter the text 1. Introduction to course design The Android course I did is a forum system, which has built a background server, so it realizes the f ...

1. Preface stay Fluent framework analysis (IV) - RenderObject In this article, we briefly introduced the core rules of RenderObject layout in fluent. Constraint is down, Size is up, and the parent node sets the position of this node. In this article, we will analyze this rule in detail. 2. Analysis of layout principles The core rules of Rend ...

[declaration] First of all, this series of articles are based on their own understanding and practice. You are welcome to correct what may be wrong. Secondly, this is an introductory series, and the knowledge involved is limited to enough. There are many blog posts on the Internet for you to learn. Finally, I hope you can gain something. ...

catalogue 1. Basic introduction: 2. Precautions and details of combination mode 2.1 advantages 2.2 disadvantages 3. Structure of mode 3.1} transparent mode 3.2 safety mode 4. Mode implementation: 4.1} transparent combination mode 4.2 safety combination mode 5. Application example of combined mode: 6. Application of combination mode ...

3.1.1 event handling mechanism based on listening classification Android basics tutorial Introduction to this section: In Chapter 2, we learn about Android UI controls. We can use these controls to form a beautiful interface, but it's just an interface; The next step is to start learning logic and business impl ...

catalogue Builder pattern Housing project demand Traditional way to solve the housing demand Problem analysis of traditional methods Basic introduction to builder mode The four roles of the builder model Schematic class diagram of builder mode Application example of builder mode to solve building demand Application and source code ana ...

Design patterns: summary of 11 Behaviroal behavioral design patterns Design patterns: summary of 11 Behaviroal behavioral design patternsRelated series of articlesprefacetext 0. Overview of behavioral design pattern1. Chain of Responsibility 1.1 applicable scenarios1.2 mode structure1.3 code example 1.3.1 handler definitio ...

In my previous blog post, I wrote an article about the design of database management platform. At that time, I did not mention one point in the design, that is, if my system should support more than N database types, and the table fields, case distinction and character length operation between each database on the market may be completely diffe ...

1. Adapter mode The Adapter Pattern serves as a bridge between two incompatible interfaces. This type of design pattern belongs to structural pattern, which combines the functions of two independent interfaces. This pattern involves a single class that is responsible for adding independent or incompatible interface functions. For a real examp ...