hackerrank coding

Summary of python coding best practices and python coding Best Practices I believe that many of you have used python, and I have always had a special liking for python. There is no doubt that as an interpreted Dynamic Language, python is not as efficient as those compiled languages, however, python is favored by its simplicity, ease of reading, scalability, and other features. Many colleagues are using pyth

---------------------- Objective ----------------------- H264 is a new generation of coding standards, with high compression quality and support for a variety of network streaming media transmission is known, in terms of coding, I understand his theoretical basis is: the reference to a period of time the image of the statistical results show that in the adjacent several images, the general difference in pix

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 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

IOS client Coding project record (3): ios client coding project 18: Fill style of Image view _ ImgView. contentMode = align; as follows: typedef NS_ENUM (NSInteger, UIViewContentMode) {comment, UIViewContentModeRedraw, // redraw on bounds change (CILS-setNeedsDisplay) UIViewContentModeCenter, // contents remain same size. positioned adjusted. UIViewContentModeTop, UIViewContentModeBotto M, UIViewContentMode

Summarize the Linux kernel development coding style, easy to write code later reference.Here are just a list of some rules, specific instructions can be consulted: kernel source (Documentation/codingstyle)01-IndentIndent tab, and tab width is 8 charactersSwich and case alignment without indentationswitch (suffix) {Case ' G ':Case ' G ':Mem BreakCase ' M ':Case ' m ':Mem BreakCase ' K ':Case ' K ':Mem /* Fall through */DefaultBreak}There is only one ex

I started to learn the encoding theory, but the more I learned it, the more I went into the fire. Why does coding solve the channel error? Redundant, yes, but there is always a lack of quantitative analysis and strict proof, getting dizzy and reluctant to look at the logic of different channel coding. Then I started to learn from information theory and gradually gained a quantitative understanding of the s

Developers are sure to be familiar with Base64 coding, and whether or not they have a clear understanding of it is not necessarily. In fact, Base64 is simply no longer easy, and if it's understood or ambiguous, it shouldn't be. About Base64, take a few minutes to get a thorough understanding of it. The article below is affixed with a Base64 codec, easy to read the article at the same time to experiment.　　I. BASE64 code ORIGINWhy do you have Base64 cod

Java coding specifications 1.1 why coding standards are especially important for programmers, there are several reasons: 80% of the cost of a software life cycle is maintenance. Almost no software is maintained by the original developer throughout its lifecycle. Coding specifications can improve the readability of software and allow programmers to understand new

General CSS coding specifications and general css Coding General CSS coding specifications In summary, some front-end encoding specifications are provided first, and most of them are common. It should be the mainstream method.1 Preface The goal of this document is to make CSS Code consistent in the style of the team, which is easy to understand and be maintained

PCM (Pulse-code modulation) Pulse coding modulation, pcm Pulse Coding modulation In audio processing, we often hear PCM data. What is PCM Data?PCM data is a digital signal after the analog signal passes through PCM. PCM is the process of converting the audio signal from analog signal (time continuous, value continuous) to digital signal (time discrete, value discrete. Digital signals have many advantages,

1. If you are in front-end development or web development, you must have heard of Zen coding-a quick way to write html/css code. It uses the syntax of the faux CSS selector to quickly develop HTML and CSS-developed by Sergey Chikuyonok.Now it is renamed to Emmet, and a new website has been built: Docs.emmet.io.2. How do I install Emmet in emacs? Identical to the installation of Php-mode.Go to GitHub, download the Emmet-mode.el file directly, and the i

Java coding specification, java Coding 1. Java Naming ConventionsIn addition to the following special cases, full English descriptors should always be used for naming. In addition, lowercase letters are generally used, but the class name, interface name, and the first letter of any non-initial word must be capitalized.1.1 General ConceptsN use the complete English descriptor whenever possibleN use terminolo

An exception was encountered using PYTHON2 encoding today unicodedecodeerror: ' ASCII ' code can ' t decode byte 0xefDiscovery is a coding problem, but the usual in the Python3 almost no encounter, so deliberately checked the data, the original Python3 and Python2 for the string understanding is different, in Python3, the string default Unicode encodingI. Interpreting Python2 and Python3 Text processing methodsIn Python3, the text string type (using t

Original address: http://www.jb51.net/article/22501.htm The difference between PHP page encoding Declaration and PHP page encoding using header or meta PHP header to define a PHP page for UTF encoding or GBK encodingPHP page for UTF encoding Header ("content-type:text/html; Charset=utf-8 ");PHP page for GBK encoding Header ("content-type:text/html; charset=gb2312 ");PHP page for BIG5 encoding Header ("content-type:text/html; Charset=big5 ");Usually the above code is placed on the homepage of the

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 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 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 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 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}