Today continue to try the version of Seajs 2.3, then do something about the demo good, just a simple data template bar, and then through some other details in-depth study First look at the directory structure, according to the official demo erection Index.html is just a simple entry file and SEAJS configuration item, at the bottom there is a seajs.use load Crontroller module and then callback the exposed combine method Crontroller module, there are some official instructions and debugging, tri
[Convert] # ifndef # define # endif usage (Arrangement) Original Author: icwk
# Ifndef
# Ifndef in the header, which is critical. For example, you have two C files, both of which include the same header file. During compilation, these two C files need to be compiled into a runable file together, so the problem arises and a large number of declarations conflict.
Put the header file content in # ifndef and # endif. Whether or not your header file will b
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,
The definition of APC constant is compared with define of PHP. Recently, when I was working on the preliminary code architecture of the cloud platform, I encountered a constant definition speed comparison problem, so I would like to make a comparison. Php apc extension, which is described in the following section in the PHP Manual: h recently encountered a constant definition speed comparison problem when working on the preliminary code architecture o
Use hidef extension in PHP instead of define to improve performance, hidefdefine. In PHP, hidef extension is used instead of define to improve performance. hidefdefine requires a new constant to open the local config. PHP file, think of hidef tested a few years ago and apc to improve PHP using hidef extension instead of define to improve performance, hidefdefine
A constant is a simple identifier. This value cannot be changed during script execution (in addition to the so-called magic constants, they are not constants). Constants are case sensitive by default. Usually, constant identifiers are always uppercase.
can be used define () function to define constants. After php5.3.0, you can use the Const keyword to define
Macro definition ' DefineRepresents a string with a specified identifier (that is, the name), which is in its general form:' Define identifier (macro name) string (macro content)such as: ' Define signal stringIts function is to specify the identifier signal instead of string, in the process of compiling preprocessing, all the signal after the command is replaced by string. This method allows the user to rep
ES6 (ECMAScript 6) is the upcoming new version of the JavaScript language standard, code-named Harmony (meaning of harmony, obviously did not keep pace with our country, we have entered the Chinese Dream version). The last standard was enacted in 2009 ES5. The ES6 is currently in the process of standardization and is expected to release the officially finalized version in December 14. But most of the standards are in place, and browser support for ES6 is also being implemented.
The way in which
css|frontpage| Web page
Note: The latest version of FrontPage is Frontpagexp (FrontPage 2003), this article is about Frontpage2000, but the method described in this article is basically applicable in Frontpagexp! Another, This is only discussed in Frontpage2000 how to define CSS, as for the knowledge of CSS, please refer to the relevant information.
When many people find it convenient to define CSS in DW4,
Objective C # Principle 22: Define external interfaces with events
Item 22: Define outgoing interfaces with events
You can use events to define some external interfaces for your type. The event is based on the delegate, because the delegate can provide type-safe function signature to the event handle. In addition, most examples of delegation are described by
Recall: # define usage,
Ansi c stipulates that: # can contain spaces or tabs, and # can contain spaces between the command and other parts. It can appear anywhere and the scope ranges from the definition to the end of the file.
Before preprocessing, the system deletes the combination of backslash and linefeed. Therefore, commands can be extended to several physical rows, which form a single logical row.
// Each #
1. Difference
(1) Definition, execution time, scope
Definition, Execution time:
#define pchar char *
typedef char *pchar;
The definition of the format difference, it is obvious to note that define is not a semicolon (text substitution), and typedef is a comma (type of renaming).
At the same time, the define is processed by the preprocessor, making
How to define PHP_VERSION_ID and php_version_id
PHP_VERSION_ID is an integer that indicates the current PHP version. It is used from php5.2.7, for example, 50207 indicates 5.2.7.Macros related to the PHP version are defined in the phpsrcdir/main/php_version.h file, as follows:
// File Location: phpsrc/main/php_version.h/* automatically generated by configure * // * edit configure. in to change version number */# d
We usually define non-constant values as constants, which are generally represented in all capitals, with no dollar sign in front of them, and can reduce errors in team development. So what's the difference between a define and a const?1, const is a language structure, and define is a function that can be specified by the third argument for case sensitivity. True
About define (' Discuz_root ', substr (DirName (__file__), 0,-7)); Understanding define (' Discuz_root ', substr (DirName (__file__), 0,-7)) ;Get site root directoryFor the above statement has not understood what is meant to check the relevant information a little closedFirst: This statement consists of three functions of define (), substr (), DirName ()1.
For example: Here the program file starts with the following #define statement
Copy Code code as follows:
#define N 10
#define PI 3.14
#define MAX 10000
#define HEIGTH 6.65
...
...
Let's say the program is running an error, and if we have
1. Const is used for class member variable definition, once defined and cannot change its value. Define defines global constants that can be accessed everywhere.2. Define cannot be defined in a class and const can.3. Const cannot define constants in conditional statementsif (... { const FOO = ' BAR '; // if (..... ) {
css|frontpage| Tips
When many people find it convenient to define CSS in DW4, they start complaining that FP2000 can't define CSS, or even criticize how bad FP2000 is. In fact, it's easy to define CSS in FP2000, even in some ways it's easier to define than DW4!
Define styl
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In Linux, netfilter provides a firewall framework with good scalability. In addition to the built-in modules, users can define new firewall modules according to their own needs.
The programming process is not very complex, as long as it can be modified
Before introducing inline functions, it is necessary to introduce preprocessing macros. Functions of inline functions and preprocessing of macros
Similar functions. We believe that we have used preprocessing macros. We often define some macros, such
# Define table_comp (x)> 0? (X): 0)
A macro is defined.
Why use Macros? Because the function call must transfer the execution order of the program to the Functi
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