Course Intermediate  17113

Course Introduction：There has been a rumor in the world that "PHP is the best language in the world". Is it true or false? Don't you want to find out? This set of courses starts from the most basic PHP syntax, from the shallower to the deeper, giving you a different learning experience.

Course Elementary  3470

Course Introduction：Promise is the most important and difficult technology in ES6. Interviews with medium and large companies will ask about the implementation of front-end Promise. This video tutorial starts from the most basic callback/exception syntax, to the basic use of Promise; from technical analysis of Promise difficulties, to step-by-step handwritten Promise implementation, extended async and await in-depth analysis, macro queue and micro queue detailed explanation; and finally through Classic interview questions to test the effect of Promise learning. After passing the level, you will become a Promise senior engineer.

Course Intermediate  11429

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  17720

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 Introduction：Recently, many friends have consulted the editor about how to define variables in matlab. Next, let us learn how to define variables in matlab. I hope it can help everyone. 1. First open the command line window of the matlab software editor. Symbol variables must be defined in advance, otherwise an error will be reported. Take x as an example to define variable symbols using "syms space variable name", as shown in the figure below. Once you have defined your symbolic variables, you can start using them. When you enter the command to delete a cube on the command line, the following results will be displayed, as shown in the figure below. 3. Then define a numeric variable, which can be defined at any time during use and can be directly assigned to the variable. For example, to define the variable a=1, you can directly enter a=1 on the command line, as follows

2024-03-04 comment 0  2030

Course Introduction：In front-end development, it is often necessary to use jquery, a js library, to implement various functions. The definition and use of variables in jquery are also part of the knowledge we need to master. This article will explain the definition and use of variables in jquery. 1. jquery variable definition In jquery, use the var keyword to define variables, as shown below: ```javascript// Define a variable var num = 1; ``` also supports defining multiple variables at one time, separated by commas That’s it:```

2023-05-23 comment 0  1608

Course Introduction：Method of defining variables: 1. Use the var keyword to define one or more variables. The syntax is "var variable name type"; 2. Use the const keyword to define constants. Constants are unmodifiable values, and their values ​​cannot be changed after they are defined. The syntax is "const constant name type = value"; 3. Use type inference to simplify the definition of variables. For example, you can use the := operator to define a variable and have the compiler automatically infer its type. The syntax is "variable name := value"; 4. Define multiple variables at the same time; 5. Blank identifiers, etc.

2023-12-15 comment 0  865

Course Introduction：Predefined variables are special variables automatically created by the interpreter in PHP. They contain information about the script execution environment and cannot be written directly. Predefined variables in PHP include: constant variables (such as __LINE__, __FILE__), special variables (such as $this), environment variables (such as $_SERVER), and global variables (such as $GLOBALS). You can access predefined variables using standard PHP variable syntax.

2024-04-29 comment 0  833

Course Introduction：The definition and assignment of variables in Golang require specific code examples. In Golang, the definition and assignment of variables are very simple and intuitive. This article will introduce the definition and assignment of variables in Golang through specific code examples. First, let's take a look at the definition of variables in Golang. In Golang, the definition of variables can be done using the var keyword. The specific syntax is as follows: var variable name type. Among them, var represents the definition keyword of the variable, and the variable name is the variable you define.

2024-01-18 comment 0  954