JavaScript

JavaScript array allocation memory is non-linear, which sacrifices performance, the advantage is more flexible, for example: array elements do not require the same type, add elements to the array does not cross. The array subscript starts at 0 and

Now backbone, Emberjs, Spinejs, Batmanjs and other MVC frameworks have come to the attack. Commonjs, AMD, Nodejs, Requirejs, Seajs, Curljs and other modular JavaScript are coming. Web front-end has evolved into a large front-end, the Web front-end

When we were developing the DOM operation, it was no problem with a simple JS application, but what if you needed to manipulate a lot of chunks in my document every time you updated the view? At this time the JS template came in handy. Source

First look at the effect, nothing special, hehe! The code that is invoked is fairly simple and does not need to create additional label or span tags, and the script will automatically generate: Let's take a look at this checkresult function,

This article describes the method of digital spin string and string-spin in JavaScript The simplest way to spin a digital string in JavaScript is to: var num = 123; var string = num + ""; That is, add a null character after the number. What

imooc.com JSGive the variable a name (variable name)In order to differentiate boxes, we can use names such as Box1,box2 to represent different boxes, BOX1 is the name of the box (that is, the name of the variable).Let's get a good name for the

Make a judgment (if statement)The IF statement is the statement that is used when the code is executed based on the condition.Grammar:if (condition) {Execute code when condition is set}Note: If lowercase, uppercase letters (IF) will go wrong!Suppose

Today, while watching the JS tutorial "official website of Liao Xuefeng", I saw the map and reduce. One of the exercises is: Do not use JS built-in parseInt() functions, using the map and reduce operations to implement a string2int() function (the

In the daily use of the map process, you will often encounter map labels, cue points and other displays do not meet our needs, need to write JavaScript code.For example, in the process of using the map, you will find that many place names appear to

Prefaceis not provided in the arrayarr.max()Andarr.min()Such a method. So is it possible to implement such a method in other ways? So today we're going to do some of the ways to take out the maximum and minimum values in the array.  Law One: in fact,

JavaScript Learning-Closures 1. What is closuresIn most books, closures are defined as "closures refer to functions that have access to variables in another function scope." ”。 The concept is too abstract to be helpful to beginners. Fortunately, the

Focus.First, the functionA function is a piece of JavaScript code that is defined once, but can be executed and called multiple times. JS functions are also objects, so the JS function can be like other objects to manipulate and pass, so we also

Today, QQ technology discussion group inside there is a person chatting, said today's interview, the interviewer asked his first question he was confused, said is the relationship between function and object, or what difference they have. At that

One: JavaScript static page value pass the URL ChapterCan pass the URL to the value. Connect the information you want to pass to the URL.Post.htm1 The code is as follows:2 3456Read.htmThe code is as follows:1 +Advantages: It is convenient to take

VAR has three types of claims: Global variables declared by Var var declared local variables within the scope of a function The global variable declared in eval. First of all1, 2 cases Var declares that the variable cannot be

The weui-switch control, how to set the value after the form is submitted, after the weui-switch is submitted I recently studied the weui framework and made some small experiments. I found that the weui-switch control could not directly submit and

The applet details page Jump and return data, the applet jump The applet details page Jump and return data Page: . Wxml File select a city . Js File Page ({data: {cityName: "Shenzhen" # keyword used for return, default: Shenzhen}, city:

Use jquery to determine whether an element contains a specified class instance, jqueryclass In jquery, two methods can be used to determine whether an element contains a definite class ). The two methods have the same functions. The two methods are

AngularJS implements routing instances and angularjs routing instances 1. First we will introduce angular. js and angular-route.js files Copy codeThe Code is as follows: 2. Create an anchor and container (ng-view) in html) page 1 page 2 3.

Deconstruct and assignment of ES6 learning variables Deconstruct and assignment of Variables In ES6, variables can be extracted from arrays and objects in certain modes and assigned values. Deconstruct and assignment of Arrays var [a,b,c] =