Understand the decorator design pattern from the root with pictures and texts
decorative pattern
Also known as: decorator pattern, decorator pattern, Wrapper, Decorator
intention
The "Decorator Pattern" is a structural design pattern that allows you to bind new behavior to an original object by placing the object in a special wrapper object that contains the behavior.
decorative design pattern
question
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Posted by Rayne on Sun, 22 May 2022 04:08:07 +0300
The project has created hundreds of threads. How do you optimize it?
preface
Have you ever encountered this situation when you open the Profiler tool of Android studio
Hundreds of threads?? Why is the name 12345? Why are they all in sleep or wait but not destroyed?
In fact, when the scale of a project becomes larger and larger, with the change of developers, the non-standard old code and the introduction of more ...
Posted by uberpolak on Sat, 21 May 2022 18:01:49 +0300
23 design patterns of Java -- II. Singleton pattern
The source code is in mine github and gitee Get in
introduce
Singleton Pattern is one of the simplest design patterns in Java. This type of design pattern is a creation pattern, which provides the best way to create objects.
This pattern involves a single class that is responsible for creating its own objects while ensuring that only a single o ...
Posted by Kunax on Sat, 21 May 2022 05:12:22 +0300
The template method pattern shows a programmer's day
Please indicate the source of Reprint: http://blog.csdn.net/lmj623565791/article/details/26276093
Continue design pattern ~ template method pattern
For the old routine, first look at the definition: it defines the skeleton of an algorithm and delays some steps to subclasses. The template method enables subclasses to redefine the steps of the al ...
Posted by christine75 on Fri, 20 May 2022 15:37:30 +0300
Detailed explanation of 23 design modes (for review)
Design Patterns
-The basis of Reusable Object-Oriented Software
Recently, I saw a big man on the blog who said that the design mode was very good. So I moved the big man's blog and sorted it out. I'll review it later. First of all, I'd like to thank the big man. The original address is: Design pattern of the beaut ...
Posted by bigdaddysheikh on Fri, 20 May 2022 07:31:59 +0300
[design notes] 234
[design notes] 234
2 Strategy
brief introduction
In general shopping malls, there are many promotion modes, including normal mode, how much to return when full, and how much to discount directly. Different amounts need to be charged according to different modes.
You can use the simple factory mode to design a CashFactory, and then set s ...
Posted by Eric_Ryk on Fri, 20 May 2022 05:00:39 +0300
Adapter mode_Dark horse programmer study notes
Overview
If you go to European countries to travel, their sockets are on the far left as shown in the picture below, which are European standards. And the plug we use is on the far right of the picture below. Therefore, our laptops and mobile phones cannot be directly charged locally. So we need a socket converter. The first side of the conv ...
Posted by FD_F on Fri, 20 May 2022 03:37:43 +0300
Bridge mode of structural mode
content
Definition and Features
Structure and Implementation
schema structure
Implementation of the pattern
Application scenarios
Extensions: Used in conjunction with the Adapter Pattern
In real life, some classes have two or more dimensions of variation, such as graphics can be divided by shape, but also by color. How to design a softw ...
Posted by arbab on Thu, 19 May 2022 17:41:06 +0300
Head First design pattern: iterator pattern
text
1, Definition
The iterator pattern provides a way to sequentially access the elements of an aggregate object without exposing its internal representation.
main points:
The iterator pattern places the responsibility for swimming between elements on the iterator, not the aggregate object. This simplifies the interface and implementation of ...
Posted by Maharg105 on Thu, 19 May 2022 05:41:33 +0300
Standardize code naming to make your Dart code more pleasant to read
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foreword
Good coding style is very important. Keeping consistent naming can make the code reading experience better and team collaboration more efficient. This article introduces the officially recommended naming conven ...
Posted by MBrody on Thu, 19 May 2022 02:17:31 +0300