best design patterns book

Command mode, which is the mechanism that encapsulates a common operation. If you are familiar with C or PHP, you may have encountered the command, which is equivalent to a callback (callback) in the program. Callbacks typically use a function pointer or data structure such as a string and array implementation in PHP, which is an abstraction over a method invocation that absorbs all the object-oriented benefits: compositing, inheritance, and processing. For example, the

$title; function __construct ($author _in, $title _in) { $this->author = $author _in; $this->title = $title _in; } function Getauthor () { return $this->author; } function GetTitle () { return $this->title; } } Class Bookadapter { Private $book; function __construct (Simplebook $book _in) { $this-

This article and the author of the original text has a certain deviation, which added a part of the personal view, please check the author's original text. *** Original Connection Http://www.dofactory.com/Patterns/PatternCommand.aspx Command mode intent: GOF in the Book of Design Patterns: "Encapsulate a request as

I. BACKGROUNDWhen it comes to producer-consumer models, it is necessary to mention multithreading, multithreaded development is commonly used in development, multi-thread programming is more stable than single-threaded,A thread that hangs does not affect the normal operation of the entire program. However, dirty reads occur when multiple threads are manipulating a data source at the same time.Ii. introduction of producer consumer ModelsThe producer-consumer model solves the problem of strong cou

design patterns are divided into three main types: creation, structure and behavior. This article describes the structural pattern.The structure mode includes adapter mode, bridge mode, combination mode, decoration mode, appearance mode, enjoy meta-mode and proxy mode.Adapter Mode: transforms the interface of a class into another interface that the customer wants. The adapter mode makes it possible for thos

Design Patterns (3) -- Abstract Factory patterns (Absrtact Factory Pattern), absrtactpattern Definition The essence of the abstract factory mode is to provide interfaces to create a series of related or independent objects without specifying the specific classes of these objects. Understanding In software systems, there are often "a series of mutually dependen

Learning C # design patterns series notes (2) Observer patterns, I. References 1. Head First Design Patterns (Chinese name: deep dive into Design Patterns) 2. Wikipedia, observer mode,

voidremoveobserver (Observer Observer) {observers.remove (Observer); } Public voidnotifyobservers () { for(Observer observer:observers) {observer.update ( This); } }}MyTest package Com.singland.dp.observer; import Org.junit.Test; public class MyTest {@Test public void Test () {Subject Subject = new Subject (); Subject.registerobserver ( new MyObserver1 ()); Subject.registerobserver ( new MyObserver2 ()); Subject.setmsg ( Linda "); Subject.not

The structural design pattern solves the coupling problem between the modules from the structure of the program. The following seven modes are included: Adapter mode: An excuse for the class can be matched to another interface Combination mode: The combination of objects Proxy mode: A Simple object instead of a complex object that will be called later Appearance Mode: A class represents a subsystem Enjoy meta mode: used to

together, a D A p T e r mode a D A p T e r is usually used after the system design is complete, and b R i d g e mode You must know beforehand that an abstraction will have more than one implementation part, so is used Therefore, it can be seen from the above description that the use of a bridge or The completed code for the adapter pattern can be viewed as a bridging mode from different viewing angles, or as an adapter mode. 6. Combination Mo

Intermittent, "Android source code design mode analysis" also read, the book mentions a lot of design patterns, but some in the development of the odds are very small, so can not master nor too much influence. I think the maximum value of this book is two points, one is

sentence may not be easy-to-understand. To put it bluntly, it means the conventional rule. You only need to clearly describe whether the corresponding occasion is really suitable)5. pattern is a means to record the software architecture. (The meaning of this sentence is to tell you which modes are used in this software architecture, and my colleagues have stipulated that your modifications or extensions must follow the general direction of the mode, the steps against these

Chapter 9 of the introduction to PHP design patterns Chapter 9 observation patterns some object-oriented programming methods provide a capability to build complex network interconnection between objects. When objects are connected together, they can provide services and information to each other. Generally, when the status of an object changes, you still need to

or after forwarding these requests. This ensures that additional functionality can be added externally without modifying the structure of a given object at run time. In object-oriented design, the extension of functionality to a given class is usually achieved through inheritance.Application Scenarios for Adorner mode:1, need to extend the functionality of a class.2, dynamic for an object to add functionality, but also can be dynamically revoked. (In

service name map collection to obtain the corresponding servicefetcher object, and then call Servicefetcher object getservice function obtains servicefetcher The service management object that the object creates. In the getService function of the servicefetcher object, first from the list of Cache arrays maintained by the Context servicefetcher whether an index lookup for an object already includes a service management object created by the Servicefetcher object, and if a service manageme

Java design patterns ------- factory patterns Java design patterns -------- factory patterns Classification and Definition 1) Simple Factory: Also known as the Static Factory Method mode, which belongs to the class creatio

Design Patterns and concurrent producer-consumer patternsProducer-consumer mode is a classic multithreaded design pattern. It provides a good solution for collaboration between multiple threads.In producer-consumer mode, typically consists of two types of threads, that is, several producer threads and a number of consumer threads. Producer LineProcess is responsi

system development progress.There is also some advice: do not focus too much on the "design Patterns" of the program. Sometimes it's easier to write a simple algorithm than to introduce a pattern. In most cases, the code should be easy to understand and even cleaner to read. However, in large projects or frameworks, there is no design pattern to organize the cod

without modifying the existing code. The difference between using wrapper mode and using inheritance: Using wrapper mode to dynamically add behavior, using inheritance is static and is determined at compile time. Assuming that the inheritance pattern is used, you must write a special class for each possible combination of behaviors, that is, the kind of behavior that your code can represent is determined by the class you are designing, and the customer cannot get a combination of

Reprint: http://blog.csdn.net/u013142781/article/details/50825301 There are 23 kinds of Java Classic design patterns, which are divided into three categories: the creation mode (5 kinds), the structure pattern (7 kinds) and the behavior pattern (11 kinds). Behavioral patterns are subdivided into 11 types: Policy mode, template method pattern, observer mode, ite