ip54 specification

PSR-1 basic code specification, psr-1 code specification This article provides standards for the basic elements of the Code to ensure that the shared PHP code has a high degree of technical interconnectivity. Key words: "MUST" ("MUST"), "must not/must not" ("must not"), and "need" ("REQUIRED "), "will" ("SHALL"), "no" ("shall not"), "SHOULD" ("shocould"), and "shouldn't" ("shocould NOT ") for detailed descr

Http://www.cnblogs.com/yangcaogui/archive/2012/04/18/2447049.htmlRead it some time ago. " NET Design Specification "This book, read to me after the feeling is the norm for developers have a pivotal importance, maybe we all have their own ideas, but I believe that follow these predecessors to summarize the norms will bring benefits to our development, so familiar with these development norms and develop good habits is required we insist, Slowly these n

:10000), not all and (-webkit-min-device-pixel-ratio:0) {...} Iphone/mobile WebKit @media screen and (max-device-width:480px) {...} 10. Use after or overflow to clear the float 11. Both inline and inline CSS must be placed in the head of the page. Order is: full-station CSS, product-level CSS, page-level (external) CSS, page-level (inline) CSS, inline CSS12. Avoid the use of inefficient selectorsSuch as:Body > * {...}UL > li > a {...}#footer > h3 {...}Ul#top_blue_nav

abbreviations when using abbreviations to not allow color names, RGB () to ensure that the 16-binary notation is uniform in capitalization. (Recommended capitalization)2D Position (background-position)You must give the value of the background-position in two directions. Because the default is 0% 0%, but gives only one direction value, the other side defaults to the Center property value.textThe font-family attribute should use the English example: font-family: "Microfoft Yahei"; Font-size attri

-8 characters (non-English operators) as their function names. function 函数(){ console.debug("中文名的函数"); } function BigLetterFunctionName(){ console.debug("Method names cannot begin with an upper case letter"); }Naming conventions for IDsYou must start with a lowercase letter, you cannot start with a capital letter, and support Utf-8 characters (non-English operators).importQtQuick 2.0QtObject{ id:中文 // IDs cannot start with an uppercase letter}QML File Naming conv

The States Field Usage specification you should know, and the States Field Usage Specification Preface I recently encountered some things in my work. I think it is necessary to share with you that we want to unify the status fields of database tables, design database tables, and simplify the use of fields in program development, I won't talk much about it below. Let's take a look at the detailed introductio

Front-end HTML specification and HTML SpecificationHTML specification-Overall Structure The file should start with " The character set of the document must be affirmed and consistent with the encoding of the file itself. UTF-8 encoding is recommended. Enter the appropriate keywords and description Based on the page content and requirements. Page title is an extremely important and indispensable item.

HTML specification and html encoding Specification 1. The document type is correct; 2. Use a lower-case element name, which looks fresh and easy to write; 3. Close each tag to be closed; 4. disable empty HTML elements, such as 5. the attribute name must be in lower case; 6. attribute values are enclosed in quotation marks; 7. Add the alt attribute to the image; 8. Avoid a line of code that is too l

whether it is final. The 7) class member method is only intended for internal invocation of the class and must be private. The 8) class member method is only exposed to the inheriting class, and is limited to protected. description: Any class, method, parameter, variable, strict access to the scope. A wide range of access is not conducive to module decoupling. Think test: If it is a private method, you want to delete it, but a public service method, or a The scope of the variable

----------------------------------------- DECLARECur_columnCURSOR for SELECTNAME fromsyscolumnsWHEREId= object_id(@tablename) OPENCur_columnFETCH NEXT fromCur_column into @columnname while @ @fetch_status = 0 BEGIN DECLARE @columnnamefirstchar CHAR(1), @tablenamefirstchar CHAR(1), @ch VARCHAR( -), @ch1 VARCHAR( -), @uppertablename

From: www.csdn.net Specification samples of Software Requirement SpecificationAuthor: hyenachenyao (BlueHyena)I. Writing PurposeThe software requirement specification is prepared to enable both the user and the software developer to operate the environment and function of the software.It has a common understanding with the initial performance requirements, making it the basis of the entire development work

Android phone app icon size specifications and naming specifications are as follows infographic.The Android Icon Specification infographic contains the Android launcher icon, the Android bottom menu icon, the Android Pop-up dialog top icon, the Androchang list internal list item icon, and the Android bottom or Top tab tag icon. Very complete.1. Android Program launch icon: ldpi (+ dpi)Small screen mdpi (DPI)Mid-screen hdpi (DPI)Large screen xhdpi (at

The first part of this series introduces the basics of JavaScript modules and today describes how to use modules in a standardized way. (up to the above) Specification of Modules first think about why the module is important? Because of the module, we can more easily use other people's code, want what function, loaded what module. However, this has a prerequisite, that is, we must write the same way the module, otherwise you have your writing,

specifications for Netease mail, as much as possible to reduce the problems caused by flexible syntax. The following is a detailed introduction: 1. variable naming rules Variable names include global variables, local variables, class variables, and function parameters. Basic specifications Variable names are composed of prefix types and meaningful words, and the first letter of a word must be capitalized. For example, sUserName and nCount. Prefix Specificat