design strategy books

consider the possibility of using a policy model to handle this change.(6) The Simple Factory mode requires the client to recognize two classes, and the use of the policy mode and the simple factory pattern, the client only need to know a class context.Iv. implementation of C + +(1) Strategy: Strategy.h#ifndef strategy_h#define strategy_h#include (2) Strategy: CashContext.h#ifndef cashcontext_h#define cash

Abstract Head first design patterns is using strategy pattern as the number one example, and Professor Chen Junshang is also using strategy as the first pattern of teaching, Visible strategy is indeed suitable for beginners to learn the first pattern. Intent A whole family algorithm is defined, and each algorithm is

In Gof's design model: The basics of reusable object-oriented software, the strategy pattern is said: Define a series of algorithms, encapsulate them one by one, and make them interchangeable with each other. This pattern allows the algorithm to be independent of the customers who use it.Strategy mode in order to adapt to different needs, only the change point encapsulation, the change point is to achieve d

The policy pattern is also a very common design pattern and is not complex. Let's take a look at the pattern here.Definition: A policy pattern defines a series of algorithms, encapsulates each algorithm, and makes them interchangeable. The policy pattern allows the algorithm to vary independently from the customer who uses it. Role: Abstract policy Role (strategy): Abstract Policy class. Specific

mode applies only to the clientKnowing all the algorithms or behaviors of the situation.2. The policy model causes a lot of policy classes. It is sometimes possible to design a policy class to be shareable by saving the environment-dependent state to the client, so that the policy class instance can be used by different clients. In other words, you can makeUse the enjoy meta mode to reduce the number of objects.The

an interface. So the duck's behavior will not be tied to death on the Duck class.}3. Multi-use combination, less inheritance {In the example, the combination is a combination of the Duck class and the fly and other behavior classes, using the combination to build the system can have a great flexibility, but also can change the behavior at run time}4. The process of rewriting the above example is using the strategy mode {The

conditional statements. 1 usingSystem;2 3 4 Abstract classStrategy5 {6 Abstract Public voiddoalgorithm ();7 }8 9 classFirststrategy:strategyTen { One Override Public voidDoalgorithm () A { -Console.WriteLine ("In first strategy"); - } the } - - classSecondstrategy:strategy - { + Override Public voidDoalgorithm () - { +Console.WriteLine ("In seco

Abstract In (original) My Design journey: using template to improve strategy pattern (OO) (c + +) (template), use C + + Template improved strategy pattern, this article uses C # 's generic to improve strategy pattern. Introduction C # 2.0 joined the generic support for generics, so you want to change the original C

In our development process, often because the initial structure is not reasonable and may cause the back of the customer or project manager to change the requirements, we need to modify the original code, on the one hand is likely to write a long time to review the trouble, on the other hand is reaching, change a place cause all the places need to change, This shows how important a good architecture is. So today we are going to talk about a strategy

The definition of the policy pattern: Define the algorithm families, encapsulate each other, so that they can be replaced with each other, this pattern allows the algorithm to change independently of the customers using the algorithm. Essence: Separation algorithm, select implementationObject-Oriented design principles:Package changesMulti-use combination, less inheritanceProgramming for interfaces, not for implementationFind out where changes may be

= = = ' S ') ){ - returnlevels (salary); - } the if(level = = = ' A ' ){ - returnLevela (salary); - } - if(level = = = ' B ') ){ + returnLevelb (salary); - } + }; A atCalculate (' A ', 10000);//Output: 30000This code is better than the above, but still does not solve the key problem, the Calculate function may become more and more large, and the function is still lack of elasticity.idea three : The strategy