Install Node

Like JVM, since node is interpreted language, it need a interpreter, which is node. To download:

sudo apt-get install nodejs

Install Node through Node Version Manager (alternative)

sudo apt-get install git
sudo apt-get install curl
curl https://raw.github.com/creationix/nvm/master/install.sh | sh
nvm install 0.10
nvm alias default 0.10

Install Node Package Manager

Similar to Composer for PHP, Node.js comes with a superior and dependable package management system called NPM and its registry npmjs.org which is easy to use and publish. Everything is administered via the package.json file and versioned locally, unless we’re installing a CLI tool with the -g option. To Download npm:

sudo apt-get install npm

Install node module (pwd,no sudo) through npm

npm search node-markdown
npm install node-markdown
npm install node-dev

Development Flow with npm

Once npm is installed, the dev-flow will be:

• create package.json and define dependency modules
• install dependency modules
• update module if necessary
• write code
• test code
• publish module
• remove module

Create package.json

npm init -- create default template
	dependencies {name:version}, * is the latest version
npm install -- install all dependency modules
	install into prj/node_modules folder

Run Application

node your_app.js

Update module

cd prj; npm update
[sudo] npm update -g  -- update all global module
	All global modules in /usr/local/libs/node_modules

Remove module

cd prj; npm prune

Nodejs Framework (Middleware)

In the context of a web server, middleware is a layer between the guts of the server and the code you’re writing to run on it that provides a set of abstractions anyone writing code for the platform will be likely to need. It differs from other modules you might pull into your application in that it exists as a buffer between Node and your app, not a utility used within your app.

http

connect

$ npm install connect

static module

node_modules/connect/lib/middleware/static.js
var connect = require("connect");
connect(connect.static(__dirname + "/public")).listen(8000);

router

// create a router to handle application paths
connect.router(function(app) {
	app.get("/sayHello/:firstName/:lastName", function(req, res) {
		var userName = req.params.firstName + " " + req.params.lastName,
		...

querystring

Receiving data from query string.

querystring = require("querystring");
http.createServer(function(req, res) {
	// parse everything after the "?" into key/value pairs
	var qs = querystring.parse(req.url.split("?")[1]),
	// property names are the same as in the querystring
	userName = qs.firstName + " " + qs.lastName,
	...

url

Routing and receiving data from path

// url like /sayHello/first name/last name:
var http = require("http"),
url = require("url");
http.createServer(function(req, res) {
// split out parts of the path
var path = url.parse(req.url).pathname.split("/");
// handle GET requests to /sayHello/
if (req.method == "GET" && path[1] == "sayHello") {
	var userName = path[2] + " " + path[3],
	...

• Express.js and EJS
  • Express provide a view system, which spit the output from template with customizable variables, it dependes on connect
  • Install Express and Generate Site with Express
    • sudo npm install -g express@3.4.x
    • express recipes
    • or express -e recipes -- which generate template with ejs support, default is jade
• Meteor
• Derby
• Socket.io

Compare Nodejs and Browser

Node Objects (Global)

global
require
module
process
console

Chrome Objects (Global)

window
location
document
console

Module

The package.json file defines the dependency. Require will cache the loaded modules. require ('./a.js'); require ('./aFolder'); require ('globalModule');

Mocha for Unit Testing

Test first (not always possible)
Test afterwards
npm install --save-dev mocha
npm install --save-dev should
npm install --save-dev supertest
cd test; macha

IDE (Eclipse) Setup

[Nodeclipse] (http://www.nodeclipse.org/)

• install Eclipse plugin

• install command line tool

    sudo npm install -g nodeclipse
    nodeclipse -c projectName -u hello-world
    nodeclipse -p -- make pwd eclipse project
  

[Emmet for Eclipse] (https://github.com/emmetio/emmet-eclipse)

• install plugin
• customize the key (note: Ctrl+D conflicts with delete line)

Resource of Learning

Javascript (and various associated framework)

• Code School and Codecademy for the basics, with NetTuts+ being a good source for going into greater depth or viewing screencasts on more advanced topics and additional frameworks
• Chrome Dev Tool tutorial video
• Node-tod at Github
• Angular tutor in 30 minutes
• [Angular Google CDN] (http://blog.angularjs.org/2012/07/angularjs-now-hosted-on-google-cdn.html)
• Get Google CDN host your js library
• The node beginner book