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enter:
> Node
>
If you get a prompt and the system does not warn you that "Sorry, there is no such command", congratulations, the installation is successful. If you still want to observe the directory structure of nodejs, you will also find that it is much simpler to upload a node.exe file. Is there anything simpler than this?
Ah? Do you have an npm. cmd batch file and node_modules folder? That, we can ignore it for the moment. You can delete them wi
attribute, the undefined value is returned.
Here is an example:
if (typeof Object.create !== 'function') { Object.create = function (o) { var F = function () {}; F.prototype = o; return new F(); };var otherPerson = Object.create(person);
When creating a new object, you can select the prototype of the object. In the above Code, we added the create method of an Object function. The create method creates a new object, uses another object as its prototype, and passes it a
designed to support frontend development. The following two DozerJS tutorials are recommended for you. One is the Getting Started tutorial and the other is the DozerJS development example.
7. Chocolate. js
Chocolate. js is a simple Web Application Framework (SET) built using CoffeeScript Based on Node.
First, create an applicationIf we use PHP to write back-end code, we need an Apache or Nginx http server, with MOD_PHP5 modules and php-cgi. From this perspective, the entire "Receive HTTP request and provide WEB page" requirement does not need PHP to handle at all.But for node. JS, the concept is completely different. When using
there is no alternative to JavaScript. ECMAScript organizations are pushing the JavaScript language at full speed. And the advent of node. JS enables developers to develop modern Web applications using pure JavaScript on the server side.With a full understanding of node. js, you will be able to develop real-time, fast
node. JS Installation and Configurationnode. JS has been in existence for more than two years, and since it's been in rapid development, some of the previous installation configurations have been introduced for most of the 0.4.x versions, and not for the latest 0.6.x versions, we'll cover the installation and configuration of
node. JS is a platform that allows JavaScript to run on the server side. node. JS is a platform created for real-time Web application development that takes into account the scalability of the architecture in real-time response/hyper-scale data requirements. It uses a single-threaded, asynchronous stone IO, event-drive
("./circle.js");//require通过引入模块文件,找到exports对象提供的接口console.log("The area of a circle of radius 4 is " + circle.area(4));Writing a slightly larger program typically blocks the code. In NodeJS , the code is generally reasonably split into different JS files, each file is a module, and the file path is the module name.When writing each module, there are require、exports、module three pre-defined variables available for use.The module name can use a relative
node. JS Installation and Configurationnode. JS has been in existence for more than two years, and since it's been in rapid development, some of the previous installation configurations have been introduced for most of the 0.4.x versions, and not for the latest 0.6.x versions, we'll cover the installation and configuration of
); }else{Console.log (' StatusCode-%d ', res.statuscode); Process.exit (1); }}req.on (' Error ', handleError); Req.on (' response ', handleresponse);Using node. js To do some small experiments, gadgets or more convenient, it built up a lot of modules, such as http,crypto(encryption), easy to use.One thing to note is that the Okvoice API, the data passed in wh
Node. JS Module Systemnode. JS provides a simple modular system to allow node. js files to be called each other.Modules are a basic part of the node. JS application, and the files and
reduce the headache caused by Environment switching.
Install
To be honest, the installation is indeed time-consuming and error-prone. I will not introduce the installation method here. Here is a tutorial address:
Http://www.11gz.com/blog/2011/06/22/windows-nodejs-configuration/ (steps are more detailed, I am referring to the tutorial ).
Note that,When installing cygwin, try to install all packages a
, res for the returned result! As for the 1337 server port, 127.0.0.1 is the server IP address!After I tried this example earlier, I felt that I knew nothing about node. js, but I could not read English, but first went to Baidu, what is node. js exactly? How does it work?node
node. js, a server-side JavaScript that allows JavaScript code to run on the backend (out-of-browser environment).
The programming mode (single thread) of event-driven, asynchronous I/O is its core.
node. JS's JavaScript engine is V8, from Google Chrome projects. V8 claims to be the fastest JavaScript engine in the world today.
node. JS provides a simple modular system to allow node. js files to be called each other.Modules are a basic part of the node. JS application, and the files and modules are one by one
(lang); Obj.greet ();But remember here, the only real thing we're exposing is the constructor of a class. This is very close to our object-oriented thinking, but one drawback is that we can't let the module expose more things. So we often use our factory model.On the difference between exports and module.exports, let's see this website: https://cnodejs.org/topic/52308842101e574521c16e06.We know we want to introduce modules into a file we just need to
-blocking in the module system and some other places because non-blocking caused problems when loading external class libraries.Node. JS was released by Dahl in 2011, but only runs on Linux. NPM is released as a package management tool for node. JS in the same year.In June 2011, Microsoft partnered with Joyent to help develop the native Windows version of
Node. JS Module Systemnode. JS provides a simple modular system to allow node. js files to be called each other.Modules are a basic part of the node. JS application, and the files and
node. JS program's event loop is occupied by CPU-intensive tasks, causing other tasks to be blocked, there is still a cpu/kernel idle state, resulting in a waste of resources.Solution SolutionsUse native modules or third-party modules to open up processes or sub-processes to handle these special tasks.3) If there is a
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