dc40 specifications

Technical Summary-android (III)-code specifications and coding specifications-android --Naming rule variable name: 1) try to get a meaningful name. For example, the member variable of a user name should be written as username, rather than just a string. 2) if it is a constant, this value will not change during the encoding process. It should be written as an upper-case name, such as USER_AGE or User_Age, if

definitions of these scripts comply with AMD (Asynchronous Module Definition, Asynchronous Module Definition) specifications.Compared with AMD specifications, CommonJS specifications are much larger. This can be seen from its slogans. Compared with jquery's write less, do more, and Commonjs, the slogans seem more ambitious, javascript: not just for browsers any more !, It has a great significance to su

10. coding specifications "The encoding style should be as reasonable and concise as possible" 10.1. Writing Style √ RequirementsThe Writing Style of the class is as follows: // Single inheritance, written as one line Classs classname: Public baseclassname // multi-inheritance, written as multi-row classs classname: Public baseclassname1, public baseclassname2 {public: //////////////////////////////////////// //////////////////////////////////////// /

MySQL database design specifications and mysql design specificationsReprinted by songdeyouxiang 1. Database naming rulesIt consists of 26 English letters (case sensitive) and 0-9 Natural Numbers (not frequently needed) with an underscore;The name must be concise and clear (the name cannot exceed 30 characters );For example, user, stat, log, or wifi_user, wifi_stat, or wifi_log can be used to add a prefix to the database;Unless it is a backup database,

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

. NET Design Specifications chapter 7th: exceptions,. net Design SpecificationsChapter 4: Exceptions Exceptions are well integrated with various object-oriented languages. Exceptions enhance API consistency. When an error is reported using the return value, the error handling code is always close to the code that may cause the error. It is easier to implement code-based error handling. Error Codes are easy to ignore and often ignored. An exception can

HTML (css style specifications) and htmlcss style specificationsCSS style specifications 1. class selector 2. Tag Selector 3. id Selector 4. CSS style sub-Selector Class Selector 1. fixed structure that must be backed up to become CSS style labels. All styles can be marked as CSS styles. 2. type = "text/css" indicates that the flag is of the css style type. Type: indicates the type.Text: Meaning of textCs

Database Operation Specifications and database specifications This article is an original article. For more information, see the source: Http://blog.csdn.net/msdnchina/article/details/42780787 1. When writing data to a database, use the nohup method or the connection mode of "operating terminal Pc> windows Host> database server host. Write operations to the database here include the following actions:

I encountered this problem when I was working on a project in the lab and finally understood it. Generally, this error occurs in statements similar to the following: Extern "C" int yylex (void );Extern "C" int yyparse (void );Extern "C" int yyerror (const char * FMT ,...); We can see that the extern keyword is used by C ++ to Expand functions when calling other languages, extern "C" means that when a project contains C, C ++, and C functions are called in the C ++ file, this function must be ext

3. Type Design Specifications "Everything is simple and beautiful"There are many types in C ++, including (specific) classes, base classes, interfaces, structures, enumerations, arrays, and so on. In this specification, we do not discuss abstract classes and interfaces in detail, because these two types belong to a special logical group, which is related to scalability. We will discuss them in the extensibility design specification. Any programming la

Web page Production WEBJX article introduction: for engineers who are familiar with C + + or the Java language, JavaScript is flexible, easy to understand, and relatively loosely formatted for code. It's easy to learn and apply to your own code. Also because of this, JavaScript coding norms are often despised, the development process of tinkering, and eventually evolved into a follow-up maintenance personnel nightmare. Software exists For engineers who are familiar with C + + or the J

Writing specifications. CSS Writing specification 1. Unified coding for Utf-8; 2. Collaborative development and division of labor: I will be based on each module, at the same time, according to the page similarity program, in advance to write a general framework document, assigned to the front-end staff to achieve internal structure & performance & behavior; Common CSS file base.css by I writing, collaborative development process, each page pleas

Specification Once for some companies have formulated norms, some experience, feeling and zero2001 text some objections or supplements, I hope to discuss with you: 1. General company production on-line norms, should consider the website as an extension of enterprise CIS, is the spirit of the enterprise, the appearance and activities of the most direct embodiment, so some basic CIS elements should be published in the Web site is more stringent embodiment. In the formulation of norms on the corpo

associated tables, which can affect the performance of SQL and even cause deadlocks. High concurrency results in database performance, high-data concurrency Scenario database usage takes precedence over performanceFour, field design specifications(11) You must define the field as NOT null and provide a default valueInterpretation:A) NULL columns make index/index statistics/value comparisons more complex and more difficult to optimize for MySQLb) Null

C + + and C's specifications differ1. After each class declaration, add a line of space after the end of each function definition.2, in a function body, logically closely related statements can not be blank lines, and logically differentiated between the paragraphs must be blank lines.3, unary operators such as "! "," ~ "," + + ","--"," "(address operator) should be preceded by a space.4. The maximum length of the code line cannot exceed 80 character

Note In the code writing process of importance, write code more than half a year can be deeply realized. Code that is not annotated is not a good code. For others to learn, at the same time for their own later to the code "upgrade" to see the Js/javascript Code annotation specifications and examples. From: http://www.56.com/style/-doc-/v1/tpl/js_dev_spec/spec-comment.htmlfile CommentsThe file comments are located at the very front of the file and shou

capitalization specification to name variables that do not change in the program's life cycle. There is another formula for full capitalization: The global variable name is all capitalized . Another way to simulate functionality using a specification is private members, and developers find it easier to use only an underscore prefix to represent a private property or method. The following are some common _private specifications:

Overview of the two basic specificationsDTS (device tree syntax, another way of saying device tree source) is a plant-based file that is used in text format for readability and modification. The DTC (device tree compiler) is a small tool that is responsible for converting DTS into a DTB (device tree blob). DTB is a binary form of DTS for use by machines. In use, we first modify the DTS file according to the hardware, and then at compile time through the DTC tool to convert the DTS file to a DTB

1. Strictly use indentation to embody the logical affiliation of the code.Python's indentation of the code is a hard requirement, which must always be noted. If the indentation of a piece of code is incorrect, then the whole program is wrong, either the syntax error cannot be executed, or the logic error results in the error, and checking for such an error can take a lot of time.2. Each import statement imports only one module, preferably in the order of standard libraries, extension libraries,

First, the Golden law: The always follows the same set of coding specifications. No matter how many people join the same project , make sure that each line of code is written as if it were the same person. html section Span style= "font-family: Microsoft Jacob Black;" > syntax Use two spaces instead of tabs (tab)- This is the only way to ensure consistent presentation in all environments. Nested elements