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for reconstruction. Do not refactor the code that you do not intend to change or will not change. Scratch Refactoring) Michael Feather's "Working processing tively with Legacy Code" book mentions the concept of Scratch Refactoring. Martin Fowler calls it "Refactoring for understanding ". This is used to deal with the (or intolerable) code that you don't understand and clean it up so that before you actually want to modify it, you can have a better un

function it? surface looks, directly learn how to complete the function with STRUTS2, see the effect is very cool things! But why do you do this? Why does the program code write this way? ? And once the Struts2 itself has bugs, how to solve it (5 years ago I play 2.1.6 when the bug is a heap)? The result is self-evident, confusedly knows nothing! I am a person w

56 kbps/8 = 7 kbps, that is, 7 kb of Data downloaded per second. In the operating system, the disk capacity is 1024 in hexadecimal format between GB, MB, and kb. Hard Disk manufacturers usually calculate the disk capacity based on 1 GB = 1000 MB and 1 MB = kb. What is 1 mbps bandwidth?

undertaken to create a unique product,service,or result.Projects can create:1. A product2. The ability to service or provide services3. Improvements to existing product lines or services4. One outcomeTwo major features of the project:　　　　　　1. Temporary (temporary)The project has a clear starting and ending pointTemporary does not mean that the duration is shortThe results of many projects are persistent　　　　　　2. Uniqueness (Unique)Project to create un

what circumstances are indexes, but not used?Indexes do not always take effect, such as the following, which will invalidate the index : If there is or in the condition, even if some of the conditions in the index are not used ( which is why the use of or is minimized ), in the example user_id no index

What is the knowledge of this function in PHP and what is its function? The following function has never been used. First, what is PHP knowledge? File processing? Or binary? Second, note it from the beginning to the end. Why have

I am always talking about database learning. I remember a teacher told us to learn a course at a university.Programming LanguageIn addition to the database, and finally learn network programming, it is very easy for us to find a job after graduation. I have been learning databases for a while, but I always know nouns like ADO (ActiveX Data Object), Dao (Data Access Object), rdo (Remote Data Object), ODBC (Open Database Connectivity), oledb (ObjectLink

A dbcontext constructor, method Overloading In the binary dbcontext instance, how is a table object added? Does the three branch categories undermine a single responsibility? The four-segment method defines the type operation specifications from the other hand. 5. assign values to attributes in the LINQ object class. Before and after the changes, sendpropertychanging and sendpropertychanged Six linqtosql triggers sendpropertychanging and sen

Cookie is a Web applicationProgramIt provides a useful method to save user information. For example, when a user accesses your site, you can use cookies to save user preferences or other information, so that when the user visits your site next time, the application can retrieve previously saved information. This article describes the application of cookies in ASP. NET applications. It shows you the technical details of cookie application in ASP. NET

, there are already a lot of related articles on the network, which are not mentioned here, only from the system startup principle. UEFI is more powerful than the BIOS because UEFI itself is already the equivalent of a micro operating system, and its convenience is:First, UEFI already has file system support, it can directly read the files in the FAT partition;

What is the difference between mvc and mvvm ?, What is the difference between mvcmvvm? Source: https://segmentfault.com/q/1010000000534091? _ Ea = 178721 Model: Very simple, it is the data objects related to the business logic, which are usually mapped from the database.

What is the difference between the sleep () method of the thread class and the Wait () method of the object that allows the thread to pause execution?The Sleep () method (Hibernate) is a static method of the thread class (threads), which causes the current thread to pause execution for a specified time, giving the execution opportunity (CPU) to another thread, bu

What this article brings to you is about what is BFC? What is the use of BFC in CSS? , there is a certain reference value, the need for friends can refer to, I hope you have some help.

What is the difference between link and @ import? What is the difference between link @ import? There are three main methods to use CSS on the page: adding the defined style attribute values in the row, calling the embedded page header and calling the external link. There are two types of external reference: link and

CDN is believed that many friends are not unfamiliar, the Internet also often see related reports. A period of time before the major CDN service provider response to the Prime Minister call, CDN also speed down the cost, like a Web-host CDN, Aliyun CDN have a large price range. Many small white friends have such a question: What is the CDN?

Statement: This is Liuguan Teacher's work "design affairs" of personal reading notes, I write this article is mainly convenient after their own temperature.Don't forget, look at Lugard. Colani's design concept and his work, as well as the German functionalist design representative-Dieter Rams and his esteemed "Webi-sabi".First, what

machine can be normal browsing, and the page uploaded to the server will always appear to see no pictures, CSS stylesheet failure and other errors. This is mostly because you use the wrong path and use an absolute path where the relative path should be used, causing the browser to not open the specified file in the specified location. Let's talk about the difference between the relative path and the absolute path that make the beginner headache.

, and defines the action between objects, which is what can be done, so this is more suitable for developing large programsBut any tool is a double-edged sword (a chopper can kill or cut a dish)To understand programming, you have to understand variablesVariable (changing amount): I