The way of software design pattern -- command pattern

  In normal development, one method calls another method directly. In this way, there is a close coupling between the method caller and the method executor. This is not conducive to expansion, so we can separate method invocation from method execution, which is the role of command mode Definition of command pattern: encapsulate a request as ...

Added by sambkk on Fri, 24 Sep 2021 11:31:51 +0300

Design mode - template mode

Let's learn another behavioral design pattern, template pattern. We have repeatedly stressed that the principle and implementation of most design patterns are very simple. The difficulty is to master the application scenarios and find out what problems can be solved. Template mode is no exception. Template pattern is mainly used to solve the tw ...

Added by control on Sun, 19 Sep 2021 01:42:55 +0300

Template mode of design mode

concept The template method pattern defines an algorithm skeleton in a method and defers some steps to subclasses. The template method pattern allows subclasses to redefine some steps in the algorithm without changing the overall structure of the algorithm. When there is a long process in the project, but the specific implementation is d ...

Added by mhoward on Fri, 17 Sep 2021 23:59:55 +0300

[Handwritten Source-Design Mode 14]-Template Method Mode-Based on Bank System Deposits

1: Theme Disassembly 1 Basic Introduction (2) Knowledge synchronization (3) Bank system deposit simulation (4) Advantages and disadvantages of template method mode (4) Scenarios applicable MVC Framework Use Knowledge Expansion 2: Basic Introduction Template method mode: simple, powerful, omnipresent, necessary for frame building. Te ...

Added by deesse on Fri, 17 Sep 2021 12:31:42 +0300

Publish subscribe mode vs observer mode

background Recently, when studying the source code of zustand, the state manager of react, it was found that its component registration binding was updated through observer mode combined with react hooks. When Lenovo wrote vue before, it often used the built-in user-defined events of vue for component communication ($emit/on). This should be t ...

Added by zemerick on Mon, 13 Sep 2021 21:20:16 +0300

Java design pattern -- Interpreter Pattern

1, Introduction The 23 design modes are roughly divided into three categories: There are 5 kinds of creation modes: factory method mode, abstract factory mode, singleton mode, prototype mode and builder mode. 7 types (structural mode): adapter mode, decorator mode, agent mode, appearance mode, bridge mode, combination mode and sharing mode. ...

Added by dearsina on Fri, 10 Sep 2021 06:40:17 +0300

SpringBoot unified log processing, 2021 Android interview

[the external chain image transfer fails. The source station may have an anti-theft chain mechanism. It is recommended to save the image and upload it directly (img-XSJ80gT0-1630940490789)(I:\SpringBoot unified log processing \ img\slf4j log output process. png)] As can be seen from the figure, after the application calls the api interface of ...

Added by dsoftnet on Tue, 07 Sep 2021 08:25:13 +0300

Glide source code is difficult to understand? Use this angle to get twice the result with half the effort and summarize your experience

// Clear request void clear(); // Pause request void pause(); } The request class has been designed, so in Request of begin Start getting pictures when you're ready; After the picture request is completed, or the loading fails, the booth map needs to be loaded. Therefore, a class needs to be designed to set the picture control; ...

Added by Lateuk on Tue, 07 Sep 2021 05:37:59 +0300

Kotlin learns to write notes. You don't even understand the principle

class Person(val age: Int, val name: String){ override fun equals(other: Any?): Boolean { val other = (other as? Person)?: return false return other.age == age && other.name == name } override fun hashCode(): Int { return 1 + 7 * age + 13 * name.hashCode() } } And java Similarly, if it is added to a data struc ...

Added by buildakicker on Tue, 07 Sep 2021 03:57:53 +0300

Understanding design pattern series #Interpreter pattern from open source framework

catalogue what is interpreter mode why do you need interpreter mode how to implement interpreter mode   Classic case of open source framework   EL expressions in Spring Analysis of RoleMapperExpression expression of Elasticsearch Parsing SQL by ShardingSphere Meal: ASTNode version evolution in ShardingSphere Usage scenario C ...

Added by php new bie on Mon, 06 Sep 2021 21:50:28 +0300