Note: I haven’t written for a long time. Today I copied an article I wrote on the company’s intranet to show off my face. I just switched to web development, so I started learning javascript!
Before the introduction of namespaces, a headache for developers was how to prevent function names/class names from conflicting with others. Within a company, project teams could make reservations through naming (such as adding prefixes, etc.) To solve this problem, but looking at the entire software development field, in today's era when collaborative development is quite popular, this problem still exists. When using multiple third-party frameworks or libraries, the only thing you can do is to pray that their naming does not conflict. If such a disaster really occurs, the only thing you can do is to abandon one of them (Note: Maybe I am ignorant) ,hehe). The introduction of namespaces has solved this problem to a considerable extent. Of course, if the namespace you use is unfortunately the same as that of other companies, and the other company is Microsoft, SUN, etc., then congratulations, haha@_@!
It is inevitable to be exposed to JavaScript when engaging in web development. The latest version of JavaScript still does not support namespaces, so the problem of naming conflicts is undoubtedly prominent. Imagine that you referenced two js files, but found that you had to give up due to naming problems. One of them, which leads to writing a lot of extra code, is undoubtedly very frustrating. Before the new version of JavaScript introduces the concept of namespaces, it is the basic obligation of our programmers to carry forward the spirit of self-reliance and creativity;-)
Prerequisite for implementation: Unlike languages such as Delphi and C#, classes in JavaScript are not objects Definition, in fact there is no real class in JavaScript, the class here is actually implemented using function simulation, and the function in JavaScript is actually an object, so in JavaScript: a class is an object. This is very different from the traditional concept. In JavaScript, creating an instance of a class is actually making a copy of the class (= object, remember). Seeing this, you should be able to see some concept of design patterns. In JavaScript, the class mechanism uses the prototype pattern.
Implementation principle: Now that the essence of the class is clearly seen, the problem is simple. If all the JS classes and functions of the GEA project team are placed as attributes in an object named GEA, and then the GEA object is Our purpose can be achieved by placing it in an object named Grandsoft. For example, Grandsoft.GEA.Person is actually the class Person (still an object) in the attribute GEA of the Grandsoft object (also an object).
The implementation is very simple. The implementation of the entire namespace mechanism does not exceed 20 lines of code. The analysis is as follows:
// Declare a global object Namespace to register the namespace
// 전역 객체에는 등록 기능만 있고 매개변수는 "Grandsoft.GEA"
Namespace와 같은 네임스페이스의 전체 경로입니다. Register = function(fullNS)
{
// 네임스페이스를 Grandsoft, GEA 등 N 부분으로 나눕니다.
var nsArray = fullNS.split('.')
var sEval = "";
var sNS = "";
for (var i = 0; i {
if (i != 0) sNS = ". ";
sNS = nsArray[ i];
// 네임스페이스 객체(존재하지 않는 경우)를 순서대로 구성하는 명령문을 생성합니다.
// 예를 들어 먼저 Grandsoft를 생성한 다음 Grandsoft.GEA를 생성합니다. , 그리고 순서대로 계속
sEval = "if (typeof( " sNS ") == 'undefine') " sNS " = new Object();"
}
if (sEval != "") eval(sEval); JavaScript에서 시뮬레이션된 네임스페이스 메커니즘의 전체 구현은 다음과 같이 사용됩니다:
// 네임스페이스 Grandsoft.GEA, Grandsoft.GCM
Namespace.register("Grandsoft. GEA");
Namespace.register("Grandsoft.GCM");
// Grandsoft.GEA 네임스페이스에 Person 클래스 선언
Grandsoft.GEA.Person = 함수(이름, 나이)
{
this.name = name;
this.age = age
}
// Person 클래스에 show() 공개 메소드 추가
Grandsoft.GEA .Person.prototype .show = function()
{
Alert(this.name "은 " this.age " 세입니다!")
}
// 방법 시연 use class Person
var p = new Grandsoft.GEA.Person("yanglf", 25);
p.show()
하하, 간단합니다. 코드는 직접 보시면 됩니다. 사실 좀 게으른 편입니다. 하하@_@!!!

Detailed explanation of JavaScript string replacement method and FAQ This article will explore two ways to replace string characters in JavaScript: internal JavaScript code and internal HTML for web pages. Replace string inside JavaScript code The most direct way is to use the replace() method: str = str.replace("find","replace"); This method replaces only the first match. To replace all matches, use a regular expression and add the global flag g: str = str.replace(/fi

So here you are, ready to learn all about this thing called AJAX. But, what exactly is it? The term AJAX refers to a loose grouping of technologies that are used to create dynamic, interactive web content. The term AJAX, originally coined by Jesse J

Article discusses creating, publishing, and maintaining JavaScript libraries, focusing on planning, development, testing, documentation, and promotion strategies.

The article discusses strategies for optimizing JavaScript performance in browsers, focusing on reducing execution time and minimizing impact on page load speed.

The article discusses effective JavaScript debugging using browser developer tools, focusing on setting breakpoints, using the console, and analyzing performance.

Bring matrix movie effects to your page! This is a cool jQuery plugin based on the famous movie "The Matrix". The plugin simulates the classic green character effects in the movie, and just select a picture and the plugin will convert it into a matrix-style picture filled with numeric characters. Come and try it, it's very interesting! How it works The plugin loads the image onto the canvas and reads the pixel and color values: data = ctx.getImageData(x, y, settings.grainSize, settings.grainSize).data The plugin cleverly reads the rectangular area of the picture and uses jQuery to calculate the average color of each area. Then, use

This article will guide you to create a simple picture carousel using the jQuery library. We will use the bxSlider library, which is built on jQuery and provides many configuration options to set up the carousel. Nowadays, picture carousel has become a must-have feature on the website - one picture is better than a thousand words! After deciding to use the picture carousel, the next question is how to create it. First, you need to collect high-quality, high-resolution pictures. Next, you need to create a picture carousel using HTML and some JavaScript code. There are many libraries on the web that can help you create carousels in different ways. We will use the open source bxSlider library. The bxSlider library supports responsive design, so the carousel built with this library can be adapted to any

Data sets are extremely essential in building API models and various business processes. This is why importing and exporting CSV is an often-needed functionality.In this tutorial, you will learn how to download and import a CSV file within an Angular


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 English version
Recommended: Win version, supports code prompts!

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

Zend Studio 13.0.1
Powerful PHP integrated development environment