design strategy books

Policy Modepolicy mode : Refers to a specified object has a behavior, but in different scenarios, the behavior has a different implementation way. by implementing the different implementations independently, and allowing them to be replaced by each other , so that the different ways independent, for the user to choose.UmlThe following is a simple arithmetic operation using the policy pattern: package strategy; /** @author WxH * @vertion 1.0 *

uses a simpler, incoming parameter (the activity type, the original price) to get the final result.Here the user only needs to know a class (Cashcontext) can be, and simple workshop need to know two classes (Cashfactory Accept_cash method and Cashfactory), that is more thorough encapsulation.Advantages of the policy modelThe algorithms are encapsulated in 1,cashcontext, and these algorithms are all doing the same work, just implementing different, which helps to extract the common functions in

In my design Journey: Strategy pattern (primary) (C + +) (OO C + +) (Template C + +), we used strategy pattern to let graph Er can draw triangle, circle and square Because the need to change again,:D, we hope that Grapher will be able to print the text in each shape, the implementation of the results are as follows Draw Hello Shape!! in Square Draw Hello C++!

Setflybehavoir (Flybehavior fb) {mflybehavior = fb;} public void Swim () {System.out.println ("~~im swim~~");}} See no, abstract superclass does not have any specific implementation class coupling, but is called through the interface. Inside the fly or quack function, are based on the same kind of mflybehavior and mquackbehavior different. Take a look at the green-headed duck and the red-headed duck implementation process. public class Greenheadduck extends Duck {public Greenheadduck () {mflybe

Division: Divide and Conquer, also known as Divide and conquer, is a very useful algorithm design strategy, it is a difficult to solve the large problem scale into some small sub-problems, solve each sub-problem, and then merge the solution of the sub-problem. As a matter of course, there are three steps to design a divide-and-conquer approach:(1) Divide division

Strategy | design Although find Shan Tianfang to broadcast the weather forecast is only a sketch in the bridge section, but, if really to say storytelling way, the "weather forecast", "world events" as a story, said "Arabian Nights." The boring news and reports are bound to have higher ratings. "Tell the story", is not a gimmick, but from the ancient Shino, the Ming and Qing dynasties, to Shadow, Peking Ope

(); } advantages of the policy model: The algorithm is free to switch This is defined by the policy pattern itself, and as long as the abstract policy is implemented, it becomes a member of the policy family and encapsulates it by encapsulating the role, guaranteeing a "free handoff" strategy. Avoid using multiple conditional judgments If there is no policy model, let's think about what it would look like. A policy family has 5 policy al

When you do one thing to complete a task, there are often many methods, each of which can be called a policy, we will according to different environments or conditions, select an appropriate method from multiple methods to complete this task or task. Just like when we go home, there are many ways to go home, such as taking a plane, taking a train, taking a bus, and walking. However, due to our own restrictions or environmental restrictions, we often choose a suitable way to go home. The method w

Big talk Design Mode C ++ implementation-Chapter 2-Strategy Mode I. UML diagram VcjDy + kernel/zbunoaM8L3A + kernel + CjxwPqOoMaOpst/kernel + kernel/AtL + 0o6zL + kernel + 7/J0tTS1M/kernel/nT0LXEy + kernel/kernel/ examples/examples + examples/examples + CjxwPqOoNKOpst/C1MSjyr2 + examples + zb/J0tS/examples/ycTc0NShozwvcD4KPHA + examples/examples + PHN0cm9uZz7LxKGiQyYjNDM7JiM0MzvKtc/WPC9zdHJvbmc + mixer + Cj