JavaScript function _ function scope __ Block chain

function in JavaScript functions are an object, and function names are references to objects. You can call it in a way var fun = new Function ("parameter", "Return value", "function Body"); So if this is the case, it's well understood. The second

JavaScript Modular Programming: Require.js usage __ Static functions

The first and second sections of this series introduce JavaScript module prototypes and theoretical concepts, and today we describe how they can be used in combat. I'm using a very popular library require.js. First, why use Require.js. At the

ArcGIS API for JavaScript call dynamic map Service + attributes, spatial query __arcgis

Introduction Call Dynamic Map Service Requirement 1 hide a layer in the service according to requirements 11 code explanation 2 through the attribute query map service Information 21 Code Implementation 22 code interpretation 3 through Space query

You may not need a JavaScript framework (iii) __java

HTTP/2 The HTTP protocol has been overridden. This is not the text of the agreement, but binary. Binary protocols are more efficient and error-prone. HTTP/2 connections are multiplexing, simply-allowing you to transmit multiple responses

JavaScript Coding style __ajax

JS Coding Style 1, all lines of code end with semicolons. Although JS does allow line breaks to end. 2, using an if or a for statement, you must use {}. Instant only one sentence. 3, unlike other programming languages, JS, block {} is not scoped

"How to better use JavaScript arrays"

Read this article hurriedly, I promise, over the last few months I, I'm sure I made 4 mistakes on array issues. So I write this article and read this article to make it easier for you to use JavaScript arrays in some wayReplacing Array.indexof with

Exercise: Do not use the JavaScript built-in parseint () function to implement a string2int () function with map and reduce operations

This exercise is from the Liaoche JS tutorial. The answer is self-written.function functions are described as follows:Turn a string 13579 into a Array -- [1, 3, 5, 7, 9] and then use reduce() it to write a function that converts the string to number.

JavaScript advanced Programming (copy variable values, pass parameters)

Copy variable valuesWhen a variable copies a base type value and a reference type value to another variable, there is a difference.One variable copies the value of the base type to another variable, creates a new value on the variable's object, and

JavaScript data structure--queue

A queue is a FIFO data knot. Queues can only insert elements at the end of a queue, deleting elements in the first team, which is not the same as the stack. It is used to store sequentially arranged data. Queues, like our daily queues, are the first

JavaScript built-in objects and usage tips (iii)

Practical Tips1 getting elements from a pagedocument.getElementById () based on the value of the IDDocument.getelmenntsbyclassname () based on the value of classDocument.getelementsbyname () based on the value of the Name

JavaScript Asynchronous Programming

1. PrefaceUsually development often use JS asynchronous programming, because the front-end display page is based on the network set-top box (IPTV general performance is not very good, Ott better), the company mainly to take the way of asynchronous

[JavaScript] ES5 Basic Knowledge Summary

1.JavaScript is a dynamic language, the appearance of ES6 make up for JS in large projects on the weakness (with "class").Here is a basic knowledge of ES5:2.Unlike traditional object-oriented languages such as C + + or Java, JavaScript actually

JavaScript Basic Practice (2)--what's This (top)

JavaScript Basic Practice (2)--what's This (top) The developer's JavaScript attainments depend on the level of understanding of the two words "dynamic" and "asynchronous". [TOC]I. What is this?thisis one of the JavaScript keywords and

In-depth analysis of JavaScript Object systems-4. Scope and closure (closure)

    4. Scope and Closure @ Wu Qiong Adam (SINA) Note: read 1-3, http://blog.csdn.net/adwu73/article/details/7229563 before reading this section   Scope is a key concept in JS. Only by figuring out it can we figure out the closure

Unknown runtime error in Javascript innerhtml

Use innerhtml to add interface elements.For example.. Html . JsDocument. getelementbyid ("tab_1 "). innerhtml = " some: ";In IE, "unknown runtime error" may sometimes occur )",But not in Firefox. This is mainly because IE checks whether

JavaScript (revised version) trial

I haven't been to iteye for a long time. Today, when I came back, I saw an envelope flashing on the top bar. It's a reading activity. What should I do? I actually bought the essence of JavaScript two years ago. It can be said that I should have

[Updated] private member in Javascript

Private Members in javascriptjavascript private member Douglas crockfordWww.crockford.com Translation: Yuan Xiaohui (blog.csdn.net/uoyevoli /) Javascript is the world's most misunderstood programming language. Some believe that it lacks the

Javascript Design Pattern reader notebook-JavaScript object-oriented implementation

  1. Various implementation methods of JavaScript classes .. In JavaScript that has been used for several years, I feel that it is not very deep, but it is superficial. Basically, some small functions are written, and classes have never been

Differences between document. getelementbyid and getelementsbyname (JavaScript)

1: The ID is unique, and the name can be the same as the name. 2: An element defines the ID. When referencing this element, the ID attribute is directly used. Name is usually used in form and must be specified by document. form. * **, that is, the

10. Adapter mode in Javascript design mode -- Adapter

 10. Adapter mode for JavaScript design mode ---- Adapter The adapter mode is a very practical design mode. This article will introduce this design mode through examples. The purpose of the adapter mode is to convert an interface of a class to

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