nodejs books

NodeJS creates the basic application and application template engine, and nodejs creates the template engine. The purpose of this project is to build a NodeJS server with the most basic functions that can be implemented, reflecting the node. js workflow and the basic framework for development.Requirement: nodejs and ex

Nodejs simple getting started tutorial (2): timer, nodejs simple SetTimeout and clearTimeout Copy codeThe Code is as follows:Var obj = setTimeout (cb, MS ); SetTimeout is used to set a callback function cb that is executed after a minimum MS of milliseconds (not immediately after a MS of milliseconds ). The setTimeout return value can be used as the clearTimeout parameter. clearTimeout is used to stop the t

thousands of concurrent connections, what can you actually build through Node? If you have a WEB application that needs to handle so many connections, it would be a "scary" thing! It's a question of "If you have this problem, then it's not a problem at all." Before answering the above questions, let's look at how Node works and how it's designed to work.Downloadhttps://nodejs.org/en/This is the website of node. js, we can download the direct access, I download is V4.4.3, if you like what versio

suffix names:module._extension['. Json '] =function (module, filename) {...}Direct assignment The delegate changes the reference of the formal parameter, but cannot change the value of the extraterritorial scope:var change = function (a) {A = 100;Console.log (a);//=>100};var a = 10;Change (a)Console.log (a);//=>10So if you want to achieve the effect of require introducing a class, assign a value to the Module.exports objectThe bottom layer is the c/c++,c/c++ built-in module belonging to the low

This method is more efficient than direct execution in DOS Windows!!!Nodejs1. Run sublime, find tools---> Build system---> New build system on the menu2. Copy the file into the{ "cmd": ["Node", "$file"], "File_regex": "^[]*file \" (... *) \ ", line ([0-9]*)", "selector": "Source.javascript"}3. Save the file as Nodejs.sublime-build4. On the menu, locate tools---> Build System---> select NodeJs5. Install the Sublime plugin JavaScript NodeJs Sn

" +where; Console.log (SQL); This. Db.query (Sql,callback); }Deleting records /* Delete */ Delete:function(tablename,where,callback) { var sql= "Delete from" + this. C.db_pre+tablename+ "where" +where; Console.log (SQL); This . Db.query (Sql,callback); }Business modelsuch as the classification model,/model/category.js/** * Classification model **/Module.exports={getalllist:function() {Db.select ("Category",function(err,list) {console.log (list);

{mydatetime=NewDate (); } varStrtimearr=[Mydatetime.getfullyear (). ToString (), (Mydatetime.getmonth ()+1). ToString (), Mydatetime.getdate (). ToString (), Mydatetime.gethours (). ToString (), Myda Tetime.getminutes (). ToString (), Mydatetime.getseconds (). ToString (),]; for(vari=0;i) {Formatstr=Formatstr.replace (Parammodel.charat (i), strtimearr[i]); } returnFormatstr; }};Load public files, define resource files/* load public files, define resource files */ Global. C=

://registry.npmjs.orgThe following will provide high-quality NPM source address, cnpm hehe.3. Temporarily modify NPM source address during installationNPM Install Express--registry http://registry.npmjs.orgSummarizeIf you have a stable proxy server or use the proxy is the bestNo proxy conditions can only be used to replace the source address of the way guerrilla.NPM is not very stable abroad, after the installation failed to use NPM cache clean to clear the cache, multiple installation try.You c

Create https service in nodejs and create https in nodejsNodejs creates an https service by Wu xueyingServerr. js Var https = require ('https'); var fs = require ('fs'); var options = {key: fs. readFileSync ('. /keys/server. key '), cert: fs. readFileSync ('. /keys/server. crt '),}; https. createServer (options, function (req, res) {res. writehead( 200); res. end ("hello world! \ N ") ;}). listen (8000 ); Client. js Var https = require ('https'); v

NodeJs basic syntax and type, nodejs basic syntax Preface Today, I want to check the knowledge about Node types. I want to summarize it and see an article on Googol, but the original link is gone. I will pull this article out of the snapshot, if the original author has a problem, contact me! This article is the basis of some JS, and experts will skip it automatically! I have never written JavaScript before.

Nodejs terminal prints progress bar instance code and nodejs progress bar 1. Scenario Import When we batch process a large number of files (for example, upload/download, save, and compile), we often want to know how the current progress is or how many failed (successful) tasks are; when our code or program has been released, a proper (Terminal/command line) progress bar can accurately reflect the installati

NodeJS Study Notes: Connect middleware module (I), nodejs Study Notes I hope you can continue reading my articles in this series. This is also the greatest encouragement and support for me. Let's make common progress and help each other. Now, go to today's topic, What is "Connect" and how to understand middleware? Let's take a look at today's article with questions. How to Understand "Middleware "? In my u

Easy creation of nodejs server (9): non-blocking operations, nodejs Server We need to pass the response object (obtained from the server's callback function onRequest () to the request handler through the request route. Then, the handler can use the functions on the object to respond to the request. Modify server. js first: Copy codeThe Code is as follows:Var http = require ("http ");Var url = require ("url

Easy creation of nodejs server (10): Process uploaded images and nodejs upload images This section describes how to upload an image and display it in a browser. Here we will use the node-formidable module developed by Felix Geisend örfer. It abstracts the parsed file data. To install this external module, run the following command in cmd:Copy codeThe Code is as follows:Npm install formidableIf similar infor

Implement blocking instances in nodejs, while nodejs blocks instances. The inherent single-Thread Programming and asynchronous callback functions in node. js make us sometimes enjoy the worry. First, how can a single thread of node. js achieve high concurrency? This is not the focus of this article. To clarify, node. javascript single thread only means that the javascript engine is single-threaded. In any c

[' callback ' + ' (' + json.stringify (actionresult) + ') ': ActionResult; Res.send (Resultdata); Res.end ()} else {//process not response or Origin response.render or response.send. Process.nexttick ((_res:any) = {if (!_res.finished) {_res.end (); }, Res)}). catch (Processrequesterror = = {Next next (Processrequesterror); })} Through the concatenation of the Routehandler and RequestHandler two methods, we make a single call to our entire fragmented func

To learn a technology, we must first set up the development environment. It is easy to set up the nodejs development environment under Ubuntu, And it is OK to directly use apt-Get. Sudo apt-Get install nodejs If you do not like apt-get directly, you can download the source code package from the official website and compile and install it directly. First install some necessary Libraries Sudo apt-Get install

Nodejs implements batch download of sister-in-law drawings and nodejs sister-in-law drawings I heard that the recently downloaded girl figure is very popular? Nodejs (javascrpt) cannot lag behind ~ Although I have never written a decent Nodejs program, as a front-end student who has at least read the book,

Use nodejs to export an excel file. Use nodejs to export an excel file. This document describes how to export an excel file from nodejs. Share it with you for your reference. The details are as follows: Nodejs generates and downloads excel files for query data. The excel-export plug-in code is as follows: Excel. js cod

Use Nodejs to develop public account backend service instances and nodejs instances Abstract: The huge user base and strong user stickiness have attracted the attention of countless developers in the past two years. Nodejs, a development tool that has developed very fast in the past two years, is especially suitable for building mobile backend systems. This artic