Responsibility chain mode common code kill if else

Responsibility chain mode common code kill if... else Today I want to discuss with you how to kill if else. People who have worked may have a deep understanding: there is nothing that if else can't handle. If so, nest it one more layer. Most people are engaged in business development, and if else cannot be avoided, but how to make the logic ...

Posted by eshban on Tue, 03 May 2022 16:30:39 +0300

Summary of common design patterns

This article is my study notes, mainly Learn self fashion Silicon Valley design pattern video Shang Silicon Valley design mode Factory mode mainly comes from Snail college design mode 1 observer mode The meteorological station designs an open API to push data to the website. When updating meteorological data, it needs to * * inform (push) ...

Posted by n00byboy on Mon, 02 May 2022 23:07:35 +0300

[design mode] Chapter 10: appearance mode, the joy of driving a small broken car

The joy of driving a small broken car I don't know if you've ever driven or sat in such a "small broken car" and he can run, but the internal entertainment or some auxiliary equipment can be almost ignored. Although the conditions are harder, we still have to create happiness for ourselves. In summer, it's too hot to install an air ...

Posted by JovanLo on Mon, 02 May 2022 06:19:49 +0300

Xiaodi classroom - learning notes: do you know structural design mode, decorator + agent mode? Stay and talk

Vision: "make programming no longer difficult to learn and make technology and life more interesting" For more architecture courses, please visit xdclass net   catalogue Episode 1 design mode of adding wings to the tiger - Introduction to decorator design mode Episode 2 meet Lao Wang's refitting collocation - play with the desig ...

Posted by Russia on Sun, 01 May 2022 23:20:46 +0300

Learning notes [23 design patterns - Section 14: Command Pattern]

Command Pattern sketch Command mode: in software design, we often need to send a request to the European Association object, but we don't know who the receiver of the request is or what the requested operation is. We just need to specify the specific receiver of the request when the program is running. At this time, we can use the command mo ...

Posted by ludwig on Sun, 01 May 2022 08:40:53 +0300

Design Mode - Combination Mode (Did you understand the double eleven combination discount)

Combination mode The Composite Pattern, also known as the Part Whole Pattern, is used to treat a group of similar objects as a single object. The composition pattern composes objects according to a tree structure, which is used to represent parts and whole hierarchies. This type of design pattern is a structural pattern that creates a tr ...

Posted by Gaoshan on Sun, 01 May 2022 03:45:42 +0300

Detailed explanation of combination mode

We know that the ancient emperors wanted to manage the country, but it was impossible to manage every people. Therefore, many institutions were set up, such as three provinces and six ministries. There were many small organizations under these institutions. They managed the country together. For another example, a large company has many small d ...

Posted by melmoth on Sat, 30 Apr 2022 07:42:32 +0300

Implementation of Java design pattern observer pattern and asynchronous processing mode

Observer mode structure There are four roles in the structure of observer mode: (1) Observable: a topic is an interface that specifies the methods to be implemented for a specific topic, such as adding and deleting observers and notifying observers to update data. (2) Observer: an observer is an interface that specifies the method used by a ...

Posted by dayo on Sat, 30 Apr 2022 02:39:42 +0300

Analysis of factory mode

Simple factory mode: Its disadvantage is that adding new products will violate the "opening and closing principle". This mode is the simplest way to create and manage objects, because it simply encapsulates the creation of different classes of objects. This pattern specifies the object to be created by passing the type to the fac ...

Posted by ciaran on Fri, 29 Apr 2022 22:35:58 +0300

Design Patterns - Creative Patterns

Design Mode - Creative Mode Creative modes have the following patterns: Singleton modeAbstract Factory ModePrototype modeBuilder patternFactory Mode Note: The abstract factory mode and the builder mode are also considered factory mode Singleton mode Introduction to single-case design patterns The so-called singleton design mode of a c ...

Posted by rayzun on Thu, 28 Apr 2022 23:17:46 +0300