JavaScript

First, function creation1. function declaration (appears in global scope, or local scope)function Add (A, b) { return a + b;}function Add (A, b) { return add1 (a); function add1 (M, N) { return m + n; }}2. Function

Original: http://charlee.li/javascript-variables-and-delete-operator.htmlJust saw a good article (the original link), the delete operator in JavaScript is very thorough analysis. Here is a brief introduction to the content.Although it is a small

1. Basic Packaging type1) To facilitate operation of the base type value, ECMAScript provides 3 special reference classes, Boolean, number, StringWhenever a primitive type value is read, the background creates a corresponding basic wrapper type

1. Complex data type ObjectAn object in ECMAScript is actually a collection of data (attributes) and functions (methods).1) Create an object instance:1. Create with constructor, new Object ()var person = new Object ();Person.name =

1 [[Prototype]][[Prototype]] is a reference to other objects, and almost all objects are given a non-null value when they are created [[Prototype]] property.var myObject = { A:2}myobject.a; // 2 Referencing an object property triggers the [

First, Concept introductionCallBack: "Callback". In spring, excellent framework callbacks are ubiquitous, and callbacks are used in many scenarios, such as SWT event monitoring, Netty, and so on. Its main role is to improve the efficiency of the

In traditional class-based languages such as Java and C + +, the essence of inheritance is to extend an existing class and generate new subclass.Because such languages strictly differentiate between classes and instances, inheritance is actually an

The iterator pattern refers to providing a way to sequentially access individual elements in an aggregated object without exposing the object's internal representation.The Array.prototype.foreach in JavaScript.Iterators in 1.JQuery$.each function2.

Arguments Object　　In JavaScript, when it comes to function parameters, you have to talk about the familiar and unfamiliar argunemts. The arguments object is used to host the arguments passed in when the function is called Arguments is not an

Let me write the two fork tree traversal, unfortunately at that time too much, in the initialization of the binary tree wasted too much time, in fact, simple object access and recursion can solve everything, at the end of the blame oneself prepared

The basic type values are: undefined，NUll，Boolean，Number和String These types occupy a fixed size space in memory, and their values are stored in the stack space, which we access by value. (1) value type: Numeric, Boolean, null, undefined.(2)

JavaScript Advanced (2)---object TypeJavaScript Original Object Type (6): (data Type)number,string,boolean,function,undefined (object Type)object(null, {}, Array, Date, RegExp ...) ) About Nan Nan is a special

The recent period of time is learning javascript, too much knowledge, need to carry out the actual use and summary, the National Day holiday just have time, wrote the following on the JavaScript summary, may be the understanding of the event is not

Js plug-in Jcrop custom screenshot function, jsjcrop custom screenshot When talking about this demand, I found some information online, but it basically does not meet the requirements of the project. Referring to some projects and the transformation

About asynchronous execution of js and about asynchronous execution of js 1. The execution environment of the Javascript language is "single thread ): Advantages: The implementation is relatively simple, and the execution environment is relatively

Ng-Bootstrap, the bootstrap interface library in Angular2, and nginit in angular Prepare Angular 2 Environment Ng-bootstrap is based on Angular 2. Therefore, you must first prepare the Angular 2 environment. Use ng-bootstrap Download ng-bootstrap Ng-

HTML semantics and some simple optimizations, html semantic Optimization   1. What is semantics? Bing Diandian's explanation Semantics refers to formatting document content with a reasonable HTML Tag and its unique attributes. In layman's terms,

Detailed explanation of JavaScript chain structure serialization, chain serialization I. Overview In JavaScript, there are too many chained code, as shown below: If_else: if(...){ //TODO}else if(...){ //TODO}else{ //TODO} Switch: switch(name){

JS click an icon or button to bring up the implementation code of the file selection box. js button The following code is implemented based on js. Click an icon or button to bring up the core code of the file selection box. The code is relatively

Bootstrap Table is used to display and load data from the server. Bootstrap-Table is a Boostrap Table plug-in that can directly display JSON data in tables. Of course, you need to configure some parameters and initialize the table. Its official