This article mainly introduces three unknown Node types. js Code optimization methods help you optimize code. If you are interested, refer to Node. the running of js programs may be limited by the CPU or input/output operations and very slow. From the CPU perspective, one of the typical causes of slow running is the un
The fs module of nodejs does not provide a copy method, but we can easily implement one. this method is to read all the file content into the memory and then write the file, this is not a big problem for small text files, such as grunt-file-copy.
I. opening analysis
Stream is an abstract interface implemented by many objects in Node. For example, a request to an HTTP server is a stream, and stdout is also a stream. Stream is readable, writable, or bo
The fs module of nodejs does not provide a copy method, but we can easily implement one. This method is to read all the file content into the memory and then write the file, this is not a big problem for small text files, such as grunt-file-copy.
I. Opening Analysis
Stream is an abstract interface implemented by many objects in Node. For example, a request to an HTTP server is a stream, and stdout is also a stream. Stream is readable, writable, or bo
// Package1 2 var Package2 = require (". /package2 " 3 console.log ("Name:" + package2.getname ()); 1 // Package2 2 var name = "Lyjn"; 3 4 /* Todo:exports Set a GetName method to get the name */ 5 function () {6 return name; 7 };Fully OK2. Knowledge points in node only module scope, no global scope require the main role1.加载模块并执行模块中的代码;2.返回exports对象;Exports object1.所有模块都有一个exports对象,默认值是一个空对象`{}`;2.可以给exports对象添加属性;Little Tricks1.require
This article mainly introduces how to use VS to develop Node. the js method mainly uses NTVS (Node. jsToolsforVisualStudio). For more information, see NTVS (Node. jsToolsforVisualStudio) is an IDE tool that runs on VS2012 and VS2013. Using this plug-in is undoubtedly a good news for our traditional. net developers to l
The same set of business logic, implementing a WebService intermediate interface, involving memcached and mogodb some operations.implemented separately in node. JS and the Java platform, Java code is deployed on Tomcat 7.0 and tested with Apache JMeter for stress testing.The resulting test results are surprisingly, why is node. JS's high concurrency advantage not
This article mainly introduces. js Implementation of file replication methods and instances, using the FS module, friends can refer to the next Node. js does not provide APIs for directly copying files. If you want to use Node. js to copy files or directories, you need to us
Node. js static server implementation method, node. js static Server
When you enter a url, the url may correspond to a resource (File) on the server or a directory. The So server analyzes the url and does different things for different situations. If the url corresponds to a file, the server returns the file. If the ur
node. JS environment Self-built, refer to the Novice tutorial node. js.1 submitting form forms in index.html via AjaxThe register.html file is as follows:DOCTYPE HTML>HTML>Head> MetaCharSet= "UTF-8" /> title>Documenttitle> Scriptsrc= "Jquery.js">Script> Scriptsrc= "Ajax.js">Script> style>form{padding:100
This article mainly introduces node. js mongodb Operations Learning summary, this article provides mongodb to create a database, insert data, connect to the mongodb database and query data and other code instances, friends can refer to the next, preparation
1. Create a table to be read in mongodb
Create a database named Test
The Code is as follows:
Use extension test;
Insert data to the user table
The C
Node. js public platform development tutorial, node. js public
How can nodejs be used to develop public platforms?
Let's not talk about anything more. First, let's briefly introduce the basic principles of the public platform.
The server is equivalent to a forwarding server. A terminal (such as a mobile phone or tablet
Node. js emitter. emit method instructions, node. js Use Cases
Method description:
When an event is triggered, several optional parameters are passed to the parameter table of the event listener.
Syntax:
Copy codeThe Code is as follows:Emitter. emit (event, [arg1], [arg2], [...])
Receiving parameters:
Event Type
Arg1 ~
The console. time Method in node. js is used in node. js scenarios.
Method description:
Start Time, which corresponds to console. timeEnd and records the time period.
Syntax:
Copy codeThe Code is as follows:Console. time (label)
Receiving parameters:
The Label corresponds to the label of console. log at the start
The console. timeEnd method in node. js is used in node. js scenarios.
Method description:
Completion time: the time spent between console. time and console. timeEnd.
Syntax:
Copy codeThe Code is as follows:Console. timeEnd (label)
Receiving parameters:
The Label corresponds to the label of console. log at the st
This article mainly introduces node. the js [superAgent] request usage example summarizes the post request, get request, delete request, and put request examples, and recommends them to you. Post request:
The code is as follows:
Request. post ('/api/pet '). End (function (resp, err ){If (resp. body. status === 200 ){Alert ('Yay got '+ JSON. stringify (res. body ));} Else {Return next (resp. body );}}
This article describes how to create a web calculator using node. js + express. For more information, see
Environment:
Host: WIN10
Express installation:
1. install express-generator
Enter the following command:
npm install -g express-generator
2. install express
Enter the following command:
npm install -g express
3. verify whether the installation is successful
Enter the command: express-V
View help: e
Node. js Data Encryption Transmission Analysis, node. js Data Encryption
Preface
For encrypted data transmission, there are several methods that people often use. One is ciphertext transmission, and the other is ciphertext transmission. The other is to encrypt data using keys and decrypt data using public keys, the tra
Node. js removes BOM headers in batches and node. js removes bom
My colleagues wrote a tool, but there is a bug that after the file is replaced, the format of the original file is changed to utf8 BOM. XML with BOM may not be readable on Mac, therefore, you need to write a tool for processing.
In fact, the idea is rela
This article mainly introduces the implementation of multi-process by child_process in Node. js. For more information, see
The code is as follows:
Var http = require ('http ');Function fib (n ){If (n Return 1;} Else {Return fib (n-2) + fib (n-1 );}}Var server = http. createServer (function (req, res ){Var num = parseInt (req. url. substring (1), 10 );Res. writeHead (200 );Res. end (fib (num) + "\ n ");});
This article mainly introduces the node. js game sharing that allows multiple users to move their mouse online at the same time. This article provides the server and client code and running methods. For more information, see the recent project requirements, so I studied the websocket Implementation of nodejs, socket. io, which is a widely used framework of nodejs background applications websocket.
Preparat
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