Course Intermediate 10951
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 17019
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 10715
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.
JavaScript set object key via variable
2023-10-09 12:00:10 0 2 502
How to determine whether a variable is a variable name or an object name
How to determine whether a variable is a variable name or an object name
2020-04-18 22:17:24 0 0 850
2017-06-26 10:58:35 0 7 889
Why use variable names as keys in object properties instead of variable values?
2023-08-15 14:11:32 0 1 436
javascript - Is it good to use object literals to organize code?
2017-06-12 09:28:53 0 3 595
Course Introduction:JavaScript is a loosely typed programming language, which means there are no such rules for declaring variable types. A variable can store multiple data types in a program, so it is important to understand the variable type before using it. In JavaScript, we can use the typeof operator to check the type of a variable or object. The typeof operator takes a variable and returns its type in string format. In addition to the typeof operator, JavaScript also provides the instanceof operator to check the type of a variable or object. The instanceof operator accepts two parameters: the object to be checked and the constructor of the type to be checked. If the constructor is an object
2023-09-03 comment 0 1251
Course Introduction:In JavaScript, sometimes we need to use variables as object keys. For example, when getting data from an API and not sure all the response data properties, we have to iterate the response object and store each of its properties. However, we cannot use variables as keys while creating the object, but after creation, we can add variable properties to the object. Syntax Users can follow the following syntax to use variables as keys in JavaScript objects. object[key]=value;In the above syntax, "key" is a variable that contains a certain value. Example In the following example, we create an object containing table properties. Additionally, we created the "dimensions" variable to store the table's dimensions
2023-08-28 comment 0 1131
Course Introduction:How to use object variables in PHP requires specific code examples. In PHP, using object variables makes it easier to manage and manipulate objects. An object variable is a data type that stores object instances. The object can be manipulated by calling methods of the class and accessing the properties of the class. The following will introduce in detail how to use object variables in PHP and provide corresponding code examples. Creating objects In PHP, you can use the new keyword to create objects. An example is as follows: classCar{public$colo
2023-09-13 comment 0 962
Course Introduction:Object Destructuring with Variable Renaming in ES6/ES2015In JavaScript, object destructuring allows you to conveniently extract properties from an object into variables. However, what if you want to rename these variables during destructuring?Instead
2024-10-18 comment 0 391
Course Introduction:You can store any type of value in a dynamic data type variable. For these types of variables, type checking occurs at runtime. Object types are the ultimate base class for all data types in the C# Common Type System (CTS). Object is an alias for the System.Object class. Object types can be assigned values of any other type, value types, reference types, predefined or user-defined types. Dynamic typing is similar to object type, except that the type checking of object type variables is performed at compile time, while the type checking of dynamic type variables is performed at run time. Example of dynamic type: dynamicz=100;Example of object type-objectobj=100;
2023-08-30 comment 0 1095