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24-day design model-strategy model, 24-day Design Model Original works of Lin bingwen Evankaka. Reprinted please indicate the source http://blog.csdn.net/evankakaI. Stragegy Pattern 1. Introduction The Strategy Mode is also called the rule mode. It encapsulates a series of algorithms and defines an abstract algorithm interface for all algorithms, all algorithms a

("ID card verified successfully, can be boarded"); A } - Else{ -Alert ("Sorry, ID verification failed!") "); the } - } - Else{ -Alert ("Non-privileged user! "); + } - } + //Pro. Train (); Boarding Success A at varProobj =NewPerson1 (); - //alert (pro.isprototypeof (proobj)); -Proobj.idcard = "007"; -alert (Pro.idcard);//the value of the instance object is not modified -Proobj.train ();//Logon Failure - DeleteProobj.idcard;//Delete the value of an attribute inProobj.train ();//L

[Big talk design model] -- Behavior Model Summary (one-to-many); big talk Design Model Based on the classification of the previous blog, this blog summarizes the one-to-many relationship: responsibility chain, intermediary, observer, iterator. In fact, there is nothing to do with these models, and there is nothing to compare. I just put them together. 1. Chain of

Single-instance model: lazy model: Regular edition; lazy model: Regular edition Directly run the Code: /* The Singleton mode ensures that a class has only one instance in a program and provides a global access point for accessing it in the program design, in many cases, make sure that one class has only one instance. For example, in the donepws system, only one

24-day design model ------ responsibility chain model, 24-day Design ModelOriginal works of Lin bingwen Evankaka. Reprinted please indicate the source http://blog.csdn.net/evankaka/article/details/432100271. Chain of Responsibility Pattern 1. Introduction You can probably guess the general appearance of this pattern from the name-there will be multiple objects with similar processing capabilities in the sy

Big talk design model: simple factory model; big talk design model factory Chapter 1: code error-free Optimization-simple factory Mode Create a computing class Operation first Operation. h file @interface Operation : NSObject@property(nonatomic,assign)double numberA;@property(nonatomic,assign)double numberB;@end Operation. m file @implementation Operation @end

Package COM. demo_type;/*** @ author ybnew * Singleton * Application Scenario: Some objects only need one. For example, the role of Emperor: ensure that only one */public class Singleton exists for an instance in the entire application {// 1. privatize the constructor and do not allow external users to directly create the object private Singleton () {}// 2. create a unique instance of a class by yourself // 3. set it to static (if it is set to private, more encapsulation) Private Static Single

(According to the msdn webcast courses) This is a behavior-oriented design model that is widely used. Objects may often need different typesAlgorithm, But if the change is frequent, the type will become very fragile. As shown inCubeTake, take different cross sections, then its area calculation method will be different, need to use different algorithms. So, how can we design Algorithms Dynamically without changing the method during runtime? Deco

find a lot of problems, board rules need to build an object? Does the user interface need to build an object? Or when a property, the user is using abstract class description or entity class, the chessboard? Do you use form as a user interface? FOM program and how to design? Wait a minute..... And so we sweat the bite to finish. The next day the manager spoke. We need to add a stool to the design. That's not easy, then build a stool class, class stool. good. Who is to use the stool? Where do y

Tags: processing his model EMS query level queries + + propertiesThe Qsqltablemodel class inherits to the Qsqlquerymodel class, which provides an editable data model that reads and writes to a single SQL table, features: Modify, INSERT, delete, query, and sort Common functions Qvariant headerdata (int section, qt::orientation Orientation, int role = Qt::D isplayrole) CO NST gets the horizontal head or verti

Please go to the original http://blog.csdn.net/nisjlvhudy/article/details/7889422 I. Overview In the multidimensional analysis of business intelligence solutions, the common models can be divided into star model and snowflake model According to the relationship between fact table and dimension table. When designing a model of logical data, you should consider wh

The Model-View-controller (Model-View-controller, MVC) mode organizes your software into three distinct roles: The model encapsulates your application data, application processes, and business logic. View obtains data from the model and formats the data for display. Controller ControlProgramProcess, recei

After the term "view model (View-model)" appears, many developers have a lot of questions. It is clear that the view model needs to deal with the intersection of views, models, and external services, but the precise approach is often carried over by a single stroke. What it should contain, what it should not contain, the lack of a clear list, they tend to become

In terms of software testing, the V model is the most widely known model, although many experienced testers are still not familiar with the V model or other models. The V model has existed for a long time and has some common characteristics with the waterfall development model