Course Intermediate  10929

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Course Advanced  16931

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Course Advanced  10633

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

Course Introduction：Usage of define constants: 1. Define numeric constants, "#define PI value"; 2. Define string constants, "#define GREETING "string""; 3. Define expression constants, "#define MAX(a, b) ((a) > (b) ? (a) : (b))”.

2023-10-11 comment 0  996

Course Introduction：The differences between define and defined are: 1. define is used to define a constant, and the constant cannot be changed or canceled after it is defined; 2. defined is to detect whether the constant is defined. If it exists, it returns true, if it does not exist, it returns false.

2019-04-08 comment 0  7644

Course Introduction：define usage: 1. Define constants; 2. Define function macros: 3. Define conditional compilation; 4. Define multi-line macros.

2023-10-11 comment 0  2595

Course Introduction：The usage of define function macro: 1. Define a simple calculation macro, "#define SQUARE(x) ((x) * (x))"; 2. Define a macro with multiple parameters, "#define MAX(a , b) ((a) > (b) ? (a) : (b))"; 3. Define macros with complex expressions, "#define ABS(x) ((x) < 0 ? -(x ) : (x))”.

2023-10-11 comment 0  1155

Course Introduction：As we all know, in PHP (php 4 and later), we can use the function define() to define constants. However, after PHP 5.3.0, in addition to using the function define(), we can also use the PHP keyword const to Define constants.

2017-06-20 comment 0  1342