JavaScript

1. VariablesLiterally, a variable is a variable amount; From a programmatic standpoint, a variable is a memory used to store a certain number of values. We can think of variables as a box, boxes for storing items, items that can be clothes, toys,

1, for String,number and other basic types, = = and = = = There is a difference1) Comparison of different types, = = Comparison of "converted to the same type of value" to see if "value" is equal, = = = If the type is different, the result is not

Maximum SubarrayFind the contiguous subarray within an array (containing at least one number) which have the largest sum.For example, given the array [−2,1,−3,4,−1,2,1,−5,4] ,The contiguous Subarray has the [4,−1,2,1] largest sum = 6

Javascript! is a very powerful scripting language, the scope of application is very wide, every web developer to learn JavaScript is also necessary, this set of video tutorials in detail on the various JavaScript knowledge points, key points, which

One, JavaScript Math objectMath Object Overview-The Math object is a global object provided by ECMAScript, which mainly encapsulates some commonly used mathematical functions and constants-The Math object does not have a constructor, cannot create

PrototypeIt is also possible for objects to define methods and properties directly through "object. Attribute/method", but it becomes static property and static method, which is called by "." To invoke.But if it is defined by prototype, then it is

First, the factory modelConsidering the inability to create a class in ECMAScript, the developer invented a function that encapsulates the details of creating an object with a specific interface.　　function Createperson (name,age,job) { var o=New

First, JavaScript operatorsOperator-Arithmetic operation +-*/% + +---Relational Operations > = -Logic Operations && | | !-Bit Arithmetic & | ~ ^ > >>>-Assignment operation = + = = *=/=%=-Character JOIN Operation +-Condition (trinocular)

Regular expressions are important in JavaScript for character matching, substitution, and validation. Basic basics of getting started with regular expressions     Regular Expression:  A Rule object,  can match our string to that rule and return true 

Project, use JavaScript to convert numbers to uppercase amounts, share them to everyone 12345678910111213141516171819202122232425262728293031323334 var digitUppercase = function(n) {    var fraction = [‘角‘, ‘分‘];    var digit = [    

Object: Memory space in memory where multiple data or methods are saved, representing the result of saving multiple properties and methods in the program.There are three ways of creating objectsMethod an object Direct quantity (an object)// Create

Alert (' 1 ' + 1)//11, not 2, this easy to forgetThe second question, it's all basic, it's easy to fall out of the pit.(function() { var a = b = 6;}) () Console.log (b); // 6 global variable declarationIn advance of the third question

Automated and efficient css development, free talk about less and flexible changes, and free talk about less Css is a code that separates html from styles for parsing. Its appearance greatly improves the programmer's work efficiency and the later

Summary of some common jQuery techniques and jquery Summary Introduction The existence of jQuery makes people who learn front-end development feel that the front-end is getting more and more easy to get started, and a few simple lines of code can be

Upload files based on jQuery Ajax, jqueryajax This article provides examples of key code for File Upload Based on jQuery Ajax for your reference. The specific content is as follows: JS Code: // SAVE function btnAdd () {var formData = new FormData ($

JS: Click the login pop-up window, and the background color gradient animation is displayed. js pop-up window The example in this article describes how to achieve a gradient animation of the background color when clicking on the login pop-up window

Javascript drag and drop application instances and javascript Application Instances In the previous articles, I also talked about the basic idea of drag-and-drop. The theory is true. What can be done in practice? The following is a small example

Check [pitfalls] in the regular expressions in javascript and brackets in the regular expressions. When using regular expressions in javascript, you need to pay attention to a pitfall in brackets, that is, the metacharacters in brackets. I stepped

Details about binary tree traversal in JS, and details about the js Binary Tree calendar A binary tree consists of a root node, a left subtree, and a right subtree. The left subtree and a friend subtree are a binary tree respectively.This article

A simple understanding of the encapsulation and inheritance features in JavaScript, javascript features Encapsulation in JavaScriptIn simple terms, encapsulation allows the outside world to only access the common variables and functions of objects,