lynda learning node js

//os.release (); View operating system version //os.type (); View operating system name //os.arch (); View operating system CPU Architecture console.log (result);Looking at the example above, try the version number of the Console.log output server operating system.Small expansion: module Description: Can be divided into the core module and file module, the core module is compiled into binary code, the reference is only a require notation, the file module refers t

Node is:Built on top of JavaScript;Event-triggered and asynchronous;Designed for data-intensive real-time programming;Learning books: "Great node. js", "node. js"Event polling: Node reg

still far less than the web, also far less than directly write native code.2, (citation) the official said very obscure: learn once, Write anywhere. I didn't say run anywhere. In fact, judging Sliderios,switchios from the official API. Wait for these controls, and then there is bound to be sliderandroid,switchandroid ..., which is likely to require multiple sets of code to be written for different platforms.3, the development is not mature, currently many UI components only iOS implementation,

() { var currenttask = Tasks.shift (); if (currenttask) { Currenttask (); } } Next (); OK, it's simple, let's look at parallelism again.Parallel Flow ControlThe following code assumes that we ran 10 parallel tasks: var taskcounter = 0; var tasksum = 10; function istaskcompleted () { if (++taskcounter = = tasksum) { Console.log (' All job done '); } } function Job () { Lots of code here Istaskcompleted (); } for (var i = 0;

eventsThe Request object contains all the contents of the user request message, and the request object can get all the data submitted by the user.The response object is used to correspond some data to the user and must use the response object when the server responds to the data to the clientRequest shorthand for REQ response to ResServer.on (' request ', function (req,res) {Send back a response to the browserRes.write (' Hello World ');For each request server must end the response, otherwise t

must be customized,functionsend404 (response) {Response.writehead ($, {"Content-type": "Text/html" }); Response.Write ("); Response.End ();}//send a file to the clientfunctionsendFile (response, FilePath, filecontents) {Response.writehead ($, {"Content-type": Mime.lookup (FilePath)}); Response.End (filecontents);}//This function is exported to the main module using thefunctionservestatic (response, Abspath) {if(Cache[abspath]) {sendFile (response, Abspath, Cache[abspath]); } Else{fs.exists (Abs

= 0;i){ varCur =Nodes[i]; if(cur.nodetype===1){if (tagName) {if (cur.nodename.tolowercase===tagname.tolowercase) {Ary.push (cur)}　}else{Ary.push (cur);}}}return ary; } Gets the previous sibling element child node of an element　function prev (ele) {var pre = ele.previoussibling; while (Pre pre.nodetype!==1) { = pre.previoussibling; }return pre;}Gets an element of all the brother element no

the State or property of the react, which requires binding this.Summary:Properties provided by react:Getinitialstate Setting the default stateSetState Modify StateRender return ComponentComponentwillmount () called before inserting the real DOMComponentdidmount () called after inserting the real DOMComponentwillupdate (Object Nextprops, Object nextstate) is called before re-renderingComponentdidupdate (Object Prevprops, Object prevstate) is called after re-renderingComponentwillunmount () calle

has started.");Note: where ONrequest (the callback function we define) is triggered, a text message is output using Console.log (). After the HTTP server has started working, a text is also output.When we run node server.js as usual, it will immediately output "server has started." On the command line. When we make a request to the server (Access htt://localhost:8888 in the browser), the "Request received" appears on the command line.This is the even

" Repository Repository type and location of package "Repository": {"Type": "Git","Location": "Http://xxx.com/c.git"} Keywords Keywords that appear in NPM search "keywords": ["AAA", "BBB"] Dependencice This module relies on modules and versions that you can use * and X wildcard characters "Dependencies": {"Express": "Latest","Connect": "2.x.x","Cookies": "*"} Engies The version of

node. JS Core Modules:1.NODEJS global variable is globals, not window2.process Process Object3.console.log () Console outputBuilt-in Modules1.util//function is unknown, seemingly inherited sub,base these two classes of(. Eg) 1 util.inherits (Sub, Base);2.events//function unknown3.fs//file stream?(. Eg)1 var fs = require ("FS"2 fs.readfile ("file.txt", "Utf-8", readfilecallback);4.HTTP Server and Clienthttp

) {callback functionConsole.log (body)})Results:{statusCode: ' 000000 ',Subaccount:{subaccountsid: ' cdxxxxxxxxxxxxxx90 ',Voipaccount: ' 8xxxxxxxx7 ',dateCreated: ' 2014-06-01 12:40:06 ',Voippwd: ' HXXXXV ',Subtoken: ' 0xxxxxxxxxxxxxxxa '}}Done!The next interfaces are similar, so it's easy. But try to IVR-related interface, but always error, has been unknown so, until the discovery of the IVR document does not have JSON corresponding format description, this thought: I le go, IVR interface does

NPM is a package management tool that is installed with node. js to address many of the problems with Nodejs code deployment, with the following common usage scenarios:Allow users to download third-party packages written by others from the NPM server to local useAllow users to download and install command-line programs written by others from the NPM server to local useAllows users to upload their own packag

Node. js learning: Using express to build a simple web Calculator Node. js learning: Using express to build a simple web Calculator Blog link:Http://blog.csdn.net/jdh99, Author: jdh, reprinted please note. Environment: HOST: WI

("'); Console.Log(' files: '+F.length); F.ForEach(function(FN){ Console.Log("---"+fn; }); })}Else{ FS.ReadFile(dir+'/'+File,"UTF8",function(Err,Data{ Console.Log(" "+Dir; Console.Log("\033[90m]+Data+"\033[39m]); }); } } });}effect :Code Analysis:The whole small program code is very simple, compared to the C languag

download the file after useJSON () and JSONP ()app.get(‘/json‘,function(req,res){ res.json({name:"devil",sex:"男",body:"strong"});});Forces the conversion of a JS object to a JSON data format sent to the client, which supports JSONP, the same effect.Redirect ()app.get(‘/baidu‘,function(req,res){ res.redirect(‘http://www.baidu.com‘);});Redirect to another pageSend ()app.get(‘/send‘,function(req,res){ res.send({some:‘json‘});});Send is a very c

Recall that I wrote node. js and MongoDB Blog, are the Novice tutorial there is the knowledge, so I intend not to write, those are the foundation, in the project development, I found that there is no basis for the foundation, these basic can learn quickly, and then learn the project development processHere are links to two tutorials:https://www.runoob.com/nodejs/nodejs-tutorial.html

First, Release NotesGo to node. JS Official website https://nodejs.org/en/download/Click on "All download Options" above to enter the address of all download lists: https://nodejs.org/dist/0. It is joyent Company maintenance. Progress is slow. but stable.4.5.* are maintained by netizens. Relative progress is fast, increasing and many new features.Even start with the stable version, the odd start of the deve

Description (2017-5-2-10:27:03):1. Need to install node,http://nodejs.cn/download/2. After installation, enter node-v in cmd to view the version.3. Code Foo.js:Attention:(1) Http.createserver two parameters, Req.url instead of Res.url, finally must res.end ()!(2) Server.listen is not listener. 3000 is the port, name it casually. The following is the routing address of their own computer, CMD in the Ipconfig

"]==data["id"]) {Con[i]=data; Flag=true; Break; }} result.msg= "The modification failed, the customer needs to be modified does not exist"; if(flag) {Fs.writefilesync (Custompath,json.stringify (con),"Utf-8"); Result={code:0, msg:"Modified successfully"}} res.writehead (200,{' content-type ': ' Application/json;charset=utf-8; '}); Res.end (json.stringify (result)); }) return; } //If the requested address is not one of these, the prompt does not existRes.writehead (404,{' conten