First, IntroductionAfter this period of time on the design pattern of learning, their feelings are still a lot of, because I now write code, often think of here can use what design mode to reconstruct. So, after you finish the design pattern, you feel it will slowly affect t
abstraction. The inheritance of the base class and subclass is the concrete implementation of abstraction, so the principle of the substitution of the Richter scale is the specification of the concrete steps to realize the abstraction. --from Baidu Encyclopedia3. Dependence reversal principle (dependence inversion Principle)This is the basis of the open and close principle, the specific content: TRUE interface programming, relying on abstraction and not dependent on the specific.4. Interface Is
Viewer design PatternThe Observer pattern defines a one-to-many dependency between objects, so that when an object changes state, all its dependents are notified and updated automatically.Structure of the Observer pattern
Abstract theme roles: Abstract theme Roles Keep all references to observer objects in a single aggregation (such as a ArrayList object
provided, which form the JDK support for the Observer pattern. 22-5 is shown below:(1) Observer interfaceOnly one method is declared in the Java.util.Observer interface, which acts as an abstract observer whose method declaration code is as follows:void Update (Observable o, Object Arg);When the state of the observed target changes, the method is called, and the update () method is implemented in the subclass of Observer, where the specific observer
the role has no actual business logic, just a delegate class.subsystem Subsystem RoleYou can have one or more subsystems at the same time. Each subsystem is not a separate class, but a collection of classes. The subsystem does not know the presence of the façade. For subsystems, the façade is just another client.Three: The application of façade modeFaçade mode has the following advantagesReduce system interdependenciesThink about, if we do not use the façade mode, the external access directly i
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Some design patterns are not necessarily related to OO, such as hierarchical mode or message mode. But most design patterns are created in oo design, and these patterns can help us discover the relationships between objects and design objects in the system. Understanding these patterns can help us to
References
Reference 1: http://stackoverflow.com/questions/1673841/examples-of-gof-design-patterns
Reference 2: http://en.wikipedia.org/wiki/Design_pattern_ (computer_science)
Reference 3: http://zh.wikipedia.org/wiki/%E8% AE %BE%E8% AE %A1%E6%A8%A1%E5%BC%8F_ (% E8 % AE % a1 % E7 % AE % 97% E6 % 9C % ba)Body
You can find an overview of a lot Design Patterns in Wikipedia. it also mentions which patterns are
Bridges (bridge) mode
Bridge mode is a very useful model, but also a more complex one. Familiarity with this pattern is helpful in understanding object-oriented design principles, including the "open-close" principle (OCP) and the combination/aggregation reuse principle (CARP). Understanding these two principles will help to form the correct design ideas and dev
Design mode (Patterns)--the basis of reusable object-oriented softwareDesign pattern is a set of reusable, most known, categorized purposes, code design experience Summary. Design patterns are used in order to reuse code, make code easier to understand, and ensure code reliability. There is no doubt that
The Flyweight pattern is used primarily to reduce the number of objects created to reduce memory footprint and improve performance. This type of design pattern is a structured pattern that provides a way to reduce the number of objects to improve the object structure required for application. The enjoy meta mode attemp
Vector UI KitMercury has released free vector UI kit for IOS 8. This file was compatible with Adobe Illustrator CC and newer. They ' ve focused on making the this file pixel-perfect. Everything is in a pixel, when possible, so then all assets be sharp and clean. They has also grouped like elements together so that it's easy for your to grab a asset and drag it t
some crazy hybrid 3D models like "hooved", this is a straightforward approach.MeshLabMeshLab is a very well-known software in the field of 3D development and data processing, a grid processing system. It helps users to handle typical unstructured models produced during 3D scan capture, and provides users with a range of tools for editing, cleaning, filtering, and rendering large-scale triangular meshes (typical three-dimensional scan meshes), which rely on the grid processing task GPL's heart
There is a Japanese bank project, today I have to do the framework support, a lot of do not understand, so the preliminary study. The feeling is as follows.
Java depth to a certain extent, it is inevitable to encounter the concept of design patterns, understanding design patterns, will make their Java interface or abstract class applications have a deeper understanding.
; Start from point to left, maximum value. int leftnum=0; for (int i=m;i>=l;i--) {leftnum+=a[i]; leftmax=leftmax>leftnum?leftmax:leftnum;}//From point to right, Max. int rightnum=0; for (int i=m+1;i (4) Scanning algorithm. Suppose we know the maximum value of a child vector up to x[n-1], which requires the maximum value of a child vector up to x[n]. Then, there are two cases: either the maximum child
js| Architecture | Design Understanding JSP Mode 2 Architecture
MVC Design Pattern Adventure
Summary:
By developing a familiar web-based shopping store, you'll learn how to tool MVC design patterns and really separate content and performance when using JSP. Govind Seshadri will show you how easy it is (2000 words
change. If the observer needs more specific information, the Observer takes the initiative to pull the data from the subject object. The pull model is more free than the push model, as long as the observer knows that something is going on, and when to get it, get it, or even get it can be decided independently. However, there are two problems:
If an observer responds too slowly, it may miss out on what was previously notified.The observer must save
To correctly use state and policy patterns in Java applications, developers need to be aware of the differences between the two patterns. Although the structure of the state and policy patterns is very similar, they also follow the open and closed principle, representing the solid design principles of the ' O ', but their intentions are completely different. The policy pattern in Java is to encapsulate a se
23 seed Gof Design patterns are generally divided into three categories: the creation mode, the structure model, the behavior pattern.Creating instances of schema abstraction, they help how to create a system independent, which is a combination of these objects and statements.Create a class schema change instance that uses an inherited class. The creation of an object type model will also delegate the instantiation of an object.The creation
Author: firedragonpzy original address:http://www.firedragonpzy.com.cn/index.php/archives/1781 In this series, I will work with you to discover the design patterns used in cocos2d-x, and in the same way, these patterns can be found in Cocos2d-iphone.Disclaimer: The excavation mode here is just my personal hobby, and through this process I hope to deepen my understanding of the use of design patterns. On the
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