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The principle of coding--BASE64 coding

BASE64 is a coding method that is typically used to encode binary data as a writable character form of data. This is a reversible encoding method. The encoded data is a string that contains characters such as A-Z, A-Z, 0-9, +,/a total of 64 characters: 26 + 26 + 10 + 1 + 1 = 64."Note: It is actually 65 characters," = "is the fill character".developers are sure to be familiar with Base64 coding, and whether

Unified common coding methods and Java Web Coding

Unified common coding methods and Java Web Coding Unified format: (UTF-8 is not required, but must be unified) JSP: Servlet: Request. setCharacterEncoding ("UTF-8"); // set the input encoding format. Response. setContentType ("text/html; charsetType = gb2312"); // you can specify the output encoding format. Database :/? UserUnicode = true characterEncoding = UTF-8

Efficient jQuery coding skills and jQuery coding skills

Efficient jQuery coding skills and jQuery coding skills Cache variableDOM traversal is expensive, so we try to cache elements that will be reused. 1 // bad 2 h = $ ('# element '). height (); 3 values ('{element'}.css ('height', h-20); 4 5 // recommended 6 $ element = $ ('# elements'); 7 h = $ element. height (); 8 rows element.css ('height', h-20 ); Avoid global variablesJQuery is the same as javascript. In

Java GBK, UTF-8 coding, javagbkutf-8 Coding

Java GBK, UTF-8 coding, javagbkutf-8 Coding Author: Qing Dujun Address: http://blog.csdn.net/qingdujun/article/details/41366301 1, GBK, UTF-8 Encoding Note: The default value is GBK encoding. Package io. dol. sn; import java. io. fileOutputStream; import java. io. IOException; import java. io. outputStreamWriter; public class EnCodeStream {public static void main (String [] args) throws IOException {// Wr

C # Coding Standard-coding habits

C # Coding Standard-coding habits 1. Avoid placing multiple classes in one file. 2. A file should have only one namespace. Avoid placing multiple namespaces in the same file. 3. A file should not exceed 500 rowsCode(Excluding the code generated by the machine ). 4. The code length of a method should not exceed 25 lines. 5. Avoid more than five parameters in the method. Use the structure to pass mu

Java Development specification summary_code coding specification, java Coding

Java Development specification summary_code coding specification, java Coding It is a good habit to gradually develop codes. 1. Basic Principles Mandatory principle:1. The StringBuilder must be used for string addition;2. try... Catch usage Try {} catch {Exception e. printStackTrace ();} finally {} // It Can Be Used in the Action on the outermost layer, and will not be used elsewhere; Try {// program code}

Talking about Android coding standards and naming standards, talking about android coding standards

Talking about Android coding standards and naming standards, talking about android coding standards Preface: At present, I am responsible for the development of two medical APP projects. At the same time, I am using LeanCloud for cloud-based development. Now the big framework has been completed and is under development in the detail module. Summarize the development specifications of Android projects: 1.

On coding encoding__ Coding in C #

1. This description is often seen when getting started in C #:. NET string is Unicode encoding.After getting started and not looking too much at this basic book and having more contact with some coding problems, my subconscious mind always feels that string has many encodings, utf8,unicode,ascii, and so on, and doesn't think C # has gb2312 encoding.2.system.text.encoding.default seems to solve all the coding

OpenCV region coding and threshold coding to achieve image compression (8*8DCT transform, retain 50% coefficient) _ Image processing

"Digital Image Processing" of an experimental operation is required as follows: I found on the Internet on the topic of the MATLAB version of the code, links are as follows: Http://wenku.baidu.com/link?url=6WlcVIE8sAg2Lnj6R7PQlv7tL7sNvBb7uhN3YZ37hj7xb855G_ Ea7yu0ek34yl7uvknrrltuubaooneos5sb-wcmywsfggaozhk-ilau6rk I refer to the above link, mainly made the following two aspects of the changes: (1) The reference code with OPENCV again (the main difficulty is that OpenCV seems to have no similar

Software Engineering: Summary of C coding practices, and summary of c Coding

Software Engineering: Summary of C coding practices, and summary of c CodingExperiment 4: the reusable linked list module is used to implement the experiment requirements of the command line menu applet V2.5. The Reusable linked list module is used to implement the command line menu applet. When executing a command, a specific function is called as the execution action. The interface design of the linked list module must be general enough, the func

Coding Process coding techniques)-naming and commenting

Reprinted please indicate the source: http://blog.csdn.net/horkychen (Excerpt from msdn-coding techniques and programming practices) Names) Naming is most helpful for understanding the logical structure of a program. A name description is "what" is more important than "how. Naming can avoid exposing the underlying implementation, thus retaining an abstract layer, simplifying the complexity of the program. For example, you can use getnextstudent () in

Manchester Coding and differential Manchester Coding

Manchester Encoding(Manchester Encoding), also known as Phase Encoding (PE), is commonly used for LAN transmission. In Manchester Coding, there is a hop in the middle of each bit. The hop in the middle is both a clock signal and a data signal. However, in different books, in Manchester encoding, the value of the level beat expression is different, which produces many ambiguities: 1. Network Engineer ExaminationAnd related materials: Bit CenterThe

Website coding performance recommendation-improve the 15 CSS coding tools developed by designers that are easier and faster

..CSS Coding CSS transform allows you to add CSS styles to any website and share your masterpiece through Transient connections. You can also invite others to help you improve your website. (Note: This tool is immune to Chinese websites )! Skeleton Skeleton is an application of CSS and JS, which can be used to quickly develop websites. Whether it's a 17-inch laptop or iPhone, it looks pretty good. .CSS3 Patterns Gallery CSS3 Patterns Gallery prov

Java implementation Havermann Coding and anti-coding instance sharing (Havermann algorithm) _java

Copy Code code as follows: Implementation class of Havermann encoding public class Hffmancoding { private int charsandweight[][];//[][0] is a character, [][1] holds the weighted value of the character (number of times) private int hfmcoding[][];//Storage Haverman private int i = 0;//loop variable Private String hcs[]; Public hffmancoding (int[][] chars) { TODO Construction Method Charsandweight = new Int[chars.length][2]; Charsandweight = chars; hfmcoding = new Int[2 * chars.lengt

Utf-8 Coding Technique URL Coding problem _ Application Technique

In a page encoded with UTF-8, the URL encoded by the ASP built-in object Server.URLEncode () is not able to locate the file correctly, and the solution is to encode it using the JavaScript escape () function. Coding comparison Program ASP version Copy Code code as follows: Response.Write ("server object output Response.Write (Server.URLEncode ("ether.エーテル.gif")); Response.Write ("Response.Write ("javascript function Encodeurl output Res

HTML5 coding specifications and html5 coding specifications

HTML5 coding specifications and html5 coding specifications When writing HTML, there may be some aspects that are not standardized. After studying the HTML5 coding specification, we will use code annotations to sort out relevant information for future review. 1

PHP Coding standards PHP Coding Standard

Conversion from: PHP writing specification PHP Coding Standard PHP writing specifications By sink Last modified: 2011-7-13 References:PHP ManualHttp://www.php.net/manual/zh/language.oop5.basic.phpPEAR Coding StandardsHttp://pear.php.net/manual/en/standards.phpC ++ Coding StandardHttp://www.possibility.com/Cpp/CppCodingStandard.htmlGoogle C ++ Style GuideHttp://g

C # coding problems and C # coding for MySQL plug-in data

public static string get_uft8 (String unicodestring) { UTF8Encoding UTF8 = new UTF8Encoding (); byte[] encodedbytes = UTF8. GetBytes (unicodestring); String decodedstring = UTF8. GetString (encodedbytes); return decodedstring; } This way, I'm taking Big5 conversion gb2312 as an example. Encoding Big5 =encoding.getencoding ("Big5"); Encoding gb2312 = encoding.getencoding ("gb2312"); Byte[] big5b= Big5. GetBytes ("No Regrets!" "

From Macroscopic to microscopic understanding of coding, macroscopic and microscopic coding

From Macroscopic to microscopic understanding of coding, macroscopic and microscopic coding Macro thinking is to have a clear understanding of what we do and understand what we are pursuing. After understanding the whole, we need to have a deep understanding of what we are interested in. This is the so-called micro-thinking. The old saying "not seeking the whole, not seeking a domain" is the same. I persona

Some jQuery coding skills and jQuery coding skills

Some jQuery coding skills and jQuery coding skills Cache variableDOM traversal is expensive, so we try to cache elements that will be reused. // Bad h = fill ('height', h-20); // recommended $ element =$ ('# element'); h = element.height();$element.css ('height', h-20 ); Avoid global variablesJQuery is the same as javascript. In general, it is best to ensure that your variables are within the function scope

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