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Value of Do{}while (0) When macro definition (#define) in C languageRecently found in the code of the new company everywhere used do{...} while (0), Google a bit, found that stack overflow early on a lot of discussion, summed up the discussion, coupled with their own understanding, do{...} while (0) the value is mainly reflected in:1. Increase the adaptability of the CodeThe following macro definition does

1. The knowledge points learned in this lesson:Function(1) Definition: A function is a standalone program module that accomplishes a specific task, including functions and custom functions:1. scanf (), printf (), and so on as library functions, provided by the C language System definition, programming as long as the direct call.2. Cylinder (), the fact () function, requires the user to define itself as a cu

1. The knowledge points learned in this lesson:Function(1) Definition: A function is a standalone program module that accomplishes a specific task, including functions and custom functions:1. scanf (), printf (), and so on as library functions, provided by the C language System definition, programming as long as the direct call.2. Cylinder (), the fact () function, requires the user to define itself as a cu

Phpmetaphone () function definition and usage, phpmetaphone. Phpmetaphone () function definition and usage, phpmetaphonephpmetaphone () function compute string metaphone key, this article introduces the phpmetaphone () function basic usage and real php metaphone () function definition and usage, phpmetaphone The metaphone key of the php metaphone () function com

Phpsimilar_text () function definition and usage, phpsimilar_text. Phpsimilar_text () function definition and usage. phpsimilar_textphpsimilar_text () function compute compares the similarity between two strings. This article introduces the phpsimilar_text () function base php similar_text () to the coders () function definition and usage, phpsimilar_text The ph

Recently in the cloud Platform for the initial code architecture, encountered a constant definition speed comparison problem, so do a comparison. The APC extension for PHP is described in the following paragraph in the PHP Manual: http://cn.php.net/manual/zh/function.apc-define-constants.php Define () is notoriously slow. Since the main benefit of APC is to increase the performance of scripts/applications, this mechanism was provided to stream Line th

Learn With Me extjs5 (14 -- module field and Grid column Definition [1]), extjs514 --Join me to learn the extjs5 (14 -- module field and Grid column Definition [1]) Section, add module custom fields, and generate model based on these fields. Then define the group and column in the grid. From this point on, we have truly entered the custom module rhythm, and the complexity and skill of the Code have been gre

The definition of a variable is used to allocate storage space for the variable. You can also specify the initial value for the variable. The variable has only one definition. Declare ProgramIndicates the type and name of the variable. Definition is also a declaration. You can use the extern keyword to declare a variable name without defining it. Extern int

I. Definition and scope of PHP Variables Variable:When calling properties in a method, you cannot directly use echo. You must use the $ this object in the class. 1. php variable definition and usage: starting with an underscore ^ [A-Za-Z _] \ W * 2. php variable scope: Local scope: variables defined within the function can only work within the function. Global scope: global $ VaR $ Goobals ['var

This article mainly introduces various common function definition methods in JavaScript, including some techniques for testing and analysis, for more information, see the following section to describe various common function definition methods in JavaScript. The specific analysis is as follows: First, let's take a look at the four most common function definitions in JavaScript: Use Function to construct a