js design pattern -- singleton pattern

What is singleton mode Ensure that a class has only one instance and provide a global access point to access it. To implement the singleton pattern, you need a variable to mark whether an instance has been created. If an instance has been created, the previously created instance is returned. If not, the new instance will be returned. The implem ...

Posted by brucensal on Wed, 18 May 2022 23:02:26 +0300

On the factory mode of GOF design mode

The essence of factory model It realizes the separation of creator and caller The core soul of design pattern is to clarify the division of labor 1. Instantiate the object and replace new with factory method 2. Press the key to select the implementation class and create object management and control. This decouples the caller from our impleme ...

Posted by JoeZ on Wed, 18 May 2022 17:38:10 +0300

How to reuse code gracefully with JDK and Spring?

preface Template, as the name suggests, is a fixed and standardized thing. Template method pattern is a behavior design pattern. It defines an algorithm framework in superclass, allowing subclasses to rewrite specific steps of the algorithm without modifying the structure. Scene problem Suppose we are masters of a beverage shop, we need at leas ...

Posted by thekidscareya on Wed, 18 May 2022 14:59:35 +0300

Detailed explanation of factory mode of design mode

Classification of patterns The creation pattern provides a mechanism for creating objects, which can improve flexibility and the importance of existing code The structure pattern explains that objects and classes assemble a larger structure while maintaining the flexibility and efficiency of the structure The behavior model is responsibl ...

Posted by gardnc on Tue, 17 May 2022 14:26:51 +0300

Adapter mode of design mode

1 Overview Adapter mode: convert the interface of a class into another interface desired by the requirements, so that those classes that cannot work together due to interface incompatibility can work together classification The class adapter pattern class has a high degree of couplingObject Adapter Pattern 2 Structure The Adapter patt ...

Posted by MG-WebDesigns on Mon, 16 May 2022 22:58:25 +0300

Bridge pattern of structural mode

definition: Separate the abstract part from its implementation part so that they can change independently. It is an object structure mode, also known as handle and body mode or interface mode. The bridge mode is similar to the multiple inheritance scheme, but the multiple inheritance scheme often violates the principle of single responsibilit ...

Posted by Loki on Mon, 16 May 2022 22:12:08 +0300

Design mode - eight different implementations of single case mode [JAVA] and single case question sorting - interview necessary - super detailed

Design mode - single case mode - eight different implementations [JAVA] and single case problem sorting - necessary for interview - super detailed Introduction to singleton mode the singleton pattern is a software design pattern that restricts the instantiation of a class to one "single" instance. It can be simply understood as: a class ca ...

Posted by SalokinX on Mon, 16 May 2022 21:13:29 +0300

Ladder: Design Patterns

Data study organized from: Station B is still Silicon Valley I wrote a set of code to understand by myself, which has been uploaded Code cloud Since the design pattern is a big topic with a lot of content, my plan is to learn some commonly used ones first, and then gradually make them comprehensive. Design Patterns Design Pattern ...

Posted by wenxi on Mon, 16 May 2022 17:10:42 +0300

Design patterns 23 design patterns

Design mode (II) 23 design modes Rookie tutorial design mode Design mode interview questions Express Edition All references in this article are from the design pattern GoF Component collaboration mode Strategy mode Have the concept of "timeline" motivation Support often changesChange the algorithm transparently to decoupl ...

Posted by zampu on Sun, 15 May 2022 21:36:33 +0300

Starting again in 2020, the fourth of JAVA design patterns is the abstract factory pattern

Abstract factory pattern (detailed version) The production of a kind of products is considered in the factory method mode, such as only raising animals in the livestock ranch, only producing televisions in the TV factory, and only cultivating students majoring in computer software in the school of computer software. The same kind is called the ...

Posted by @sh on Sun, 15 May 2022 08:08:21 +0300