node js connect to db2

the method is mounted on the exports object as a property to define how it is exported: Math.jsExports.add = function () {var sum = 0, i = 0, args = arguments, L = args.length;while (I return sum;};In another file, when we introduce a module through the Require () method, we can invoke the defined property or method:123Program.jsvar math = require (' math ');Exports.increment = function (val) {return Math.add (Val, 1);3. Module identificationThe module ID is actually a parameter passed to the R

1, first http://www.nodejs.org/download node. JS in the official website2. Open command line cmd, enter the Nodejs\node_modules\ directory, enter NPM install Socket.io installation Socket.io module. Don't hurry. Turn off this cmd window, which is useful later3, build the service-side code Server.js1 varHTTP = require (' http ');2 varIO = require (' Socket.io ');3 varCisserver = Http.createserver (function(R

more like directly operating a server, but this is still PaaS.Variable Configuration We can configure environment variables through the npm module ey_config. Engine Yard also supports accessing your machine through SSH, so that we can directly create config. json and put it in a correct place.Deployment This is deployed through git, but the node version in the package. json file only supports 0.8.11 at most.Precautions and Control Panel When we creat

app. add routes (app) at the end of js, and delete the app. app in js. get ('/', routes. index); app. get ('/u/: user', routes. user); app. post ('/Post', routes. post); app. get ('/reg', routes. reg); app. post ('/reg', routes. doReg); app. get ('login', routes. login); app. post ('login', routes. doLogin); app. get ('/logout', routes. logout ); Question 7:Req. the flash method cannot be used. The soluti

three: Connect using node. js and MySQLWhen node. js is installed by default, the module files are placed in the/usr/local/lib/node_modules directory;node. js connection MySQL needs to

In the previous article, we ran the 3D elastic Layout Algorithm on the Web Workers background. This article will go further and run the algorithm to the real background: Node. js, declare Node in advance. like Web Workers, js does not provide high performance in this application scenario. It is purely for fun and of co

) {12 socket.readable = socket.writable = true;13 socket.resume();14 server.connections++;15 socket.server = server;16 server.emit("connection", socket);17 socket.emit("connect");18 }19 });20 });21 We have created an HTTP server in the worker process, but this HTTP server does not listen or bind a port. When receiving the socket

Tags: node. js replset node. js Replica SetWith the rise of web2.0, the application of high concurrency large data volume is becoming more and more obvious, and the traditional relational database is weak in this aspect. A spear has its own shield, and the presence of a memory db compensates for the shortcomings of the

problem introduced a yarn.lock mechanism, this is the author of the project Yarn.lock file. Yarn.lock file formatAs you can see, this file has locked the version number of the dependent module, and when you do yarn install , yarn will read the file to get the dependent version number, and then follow this version number to install the corresponding dependent module, so that the dependency will be locked, no longer worry about the issue of the version number. Other people or other circumstances

Tags: show delivery pre one localhost test modify basic preparationWrite in frontThe recent reading of the node. JS Learning Guide does not introduce much to MongoDB, but for a front-end developer, even if you haven't used the database, you can understand and use it well. A very good introduction to the Book of node. js