GOF "design pattern" is described in the strategy mode:
Define a series of algorithms that encapsulate them one by one and make them interchangeable with each other. The strategy mode allows the algorithm to vary independently from the customer who uses it.
The strategy model is based on the following principles:
1 Each object is an individual with responsibil
October 24 Aliyun 11 Ecological Carnival Grand Opening, the Aliyun storage products are also with the cloud storage of the various road housekeeping products to customers in good faith, double 11 to buy how to be more affordable, small series for everyone to solve the purchase of crude products introduction:
Strategy One: 10.24-11.10 filling value card • Enjoy back coupons • Smoking Awards
Double 11 preheating activity has officially opened the curt
Summary of some strategies of PHP program efficiency optimization, PHP Efficiency Strategy Summary
1. In the case of file_get_contents instead of file, fopen, feof, Fgets and other series of methods, try to use file_get_contents, because he is much more efficient! But pay attention to file_get_ Contents PHP version problem when opening a URL file; 2. As much as possible file operation, although PHP file operation efficiency is not low;3. Optimize the
9.1 informatization strategy and enterprise management strategy
Different enterprises have different focuses on their business strategies in different periods. Therefore, the demands for informatization vary at different stages. If the enterprise's strategic focus is on product upgrades, the application of CAD, PDM, Capp, GT, GAM and other information technologies becomes more urgent. If the enterprise fo
Windows File Association and open method list-modify registry strategy and file association registry strategy
Here are all ways to modify the registry. After searching for the Internet for half a day, some of them only have the method to add file associations, but they have not been added to the open method list. Some have the method to add files to the file list, it is used with the control panel-> folder
Webpage color strategy (white) and webpage color strategy
White physical brightness is the highest, but it gives people a cold feeling. As the color of paper and wall in life, white is the most commonly used webpage background color. Under the background of white, most colors can achieve good performance. White gives people the feeling of being white, bright, pure, objective, truth, simple, holy, just, brig
Registry reg file full strategy-Registry use full Strategy 15
1. What is Reg?
The reg file is actually a registry script file. You can double-click the reg file to import the data to the Registry. Using the reg file, we can directly modify the Registry. Its registry operations are not restricted by the Registry Editor. Therefore, the Registry Editor is more powerful and flexible. In addition, the reg
Mobile Development Network Traffic streamlining strategy and network traffic Strategy
As a mobile developer, I have also worked on many projects over the past few years. Today I am writing a simple article on network traffic reduction. I hope this article will help all mobile developers, and the service developers of interfaces are helpful.
Why is it simplified? (Why)
1. Save User traffic.
Because the user
Concise Vim leveling strategy (transfer) and vim leveling strategy
Original article: http://coolshell.cn/articles/5426.html
Vim's learning curve is quite large (see the learning curve of various text editors). Therefore, if you see a lot of VIM command classification at the beginning, you will lose interest in this editor. The following article is translated from "Learn Vim Progressively". I think this is t
JS and design pattern ------ Strategy pattern StrategyI. general summary 1. I talk about the policy mode, also known as the algorithm cluster mode, which defines different algorithms and can replace them with each other, this mode makes the algorithm changes independent of the customers who use the algorithm. The policy mode is similar to the factory mode. The policy mode is relatively simple and easy to understand, and can be switched freely at runti
Strategy Mode:
Define a series of algorithms, encapsulate them one by one, and they can replace each other. The strategy mode enables the algorithm to change independently of the users who use it.
Specifically, key features of the policy model include:
Intent: You can use different business rules or algorithms based on the context. Problem: the selection of the desired algorithm depends on the user who send
source. The identifier generated by the high-low-level algorithm is unique only in a particular database.
Seqhilo
Use a high/low algorithm to efficiently generate Long,short to get an int type identifier, given the name of a database sequence
Uuid
Generates a string-type identifier with a 128-bit UUID algorithm, which is unique across a network, and the UUID is encoded as a string of 32-bit 16-digit digits
Guid
Using database-generated GUID strings in MS SQL Server and MySQL
Native
Select Ident
Webpage element center strategy _ (3) horizontal vertical center of known wide and high elements, center strategyHorizontal vertical center scheme of known wide and high elements
The position absolute is used for implementation. The horizontal center is added based on the vertical center of the previous article.Code
Index.html
Webpage element center strategy _ (1) element horizontal center, center strategyHorizontal Center Scheme of In-row Elements
The row element is enclosed in a parent layer element whose display is block.text-align:centerYou can achieve
Code Implementation
Index.html
A horizontal center solution for block elements
Set the margin of a block to auto on the left and right. You can set the upper and lower margin as needed.{margin:0 auto}Code Implementation
Webpage element center strategy _ (2) vertical center of elements, center strategyVertical center of elements in a single row
Set the Row Height of the element in the row to the height of the parent element or the height of the package block to realize vertical center. For details, see the code.
Code Implementation
Index.html
Multi-row vertical center scheme of intra-row Elements
Let the package block simulate the table unit, and then usevertical-a
Test Architect Training: 5 Test Strategy Practical Introduction2016-09-06Directory1 start2 first-time use of the "four-step Test strategy Formulation Act"2.1 Product Quality Grade2.2 Determine the quality level of each feature in the project2.3 Risk analysis of the project as a whole2.4 Determining the structure of the test strategy2.5 Preliminary determination of test layering2.6 Reviews3 Developing the ov
the strategy model of Java and Schema (reprinted from http://www.cnblogs.com/java-my-life/archive/2012/05/10/2491891.html)
In Dr Shanhong's "Java and Schema" book, this describes the policy (strategy) pattern:
the policy pattern belongs to the behavior pattern of the object. The intention is to encapsulate each algorithm in a separate class with a common interface for a set of algorithms so that they can
Original source: http://www.cnblogs.com/java-my-life/archive/2012/05/10/2491891.html
In Dr Shanhong's "Java and Schema" book, this describes the policy (strategy) pattern:
the policy pattern belongs to the behavior pattern of the object. The intention is to encapsulate each algorithm in a separate class with a common interface for a set of algorithms so that they can be replaced by each other. The policy pattern allows the algorithm to change witho
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