JavaScript for Line of Business Applications

In this simple step-by-step guide you will learn how to install node.js and how to build your first application with it. Read more!

Everyone talks about Node.js these days, but you’re not quite sure what it is? Or, do you just want to impress your friends with some nerd knowledge? This article will take you on a quick ride through the world of Node.js!

As previously mentioned, Node ships with a collection of core modules. This section describes three commonly used core modules, but this section is by no means comprehensive.

If you want to use more than the core modules, there is no way around using Node’s Package Manager, or npm. npm installs third party modules from its registry which contains over 64,000 modules. 

In this quick blog post I’ll show you how to create a simple VNC client in about 200 lines of JavaScript.
For our goal we’re going to use only HTML5 and JavaScript (client and server side).

Our application will have very simple architecture – a proxy server written in Node.js and a client in HTML5 and JavaScript. The Node.js server will stay between the browser and the VNC server. We need it because the client-side JavaScript does not supports TCP sockets so we can’t connect directly to the VNC server. The HTML5 client will have a canvas on which we will draw the frames we receive from the server.
For VNC server you can use the free version of RealVNC.

First lets start with the server. Make sure you have node.js installed. We will use four node modules: rfb2, connect, socket.io and node-png.

MEAN stack is a full JavaScript solution that helps you build fast, robust and maintainable production web applications using MongoDB, ExpressJS, AngularJS and Node.js.
Sails.js allows you to build custom, enterprise-grade Node.js apps using the Model-View-Controller pattern to organize your code so it is easier to maintain.
New MEAN Stack = MongoDB+ExpressJS+AngularJS+Node.js+Sails.js = MEANS stack

In this course, Jack Franklin will teach you how to build NodeJS modules, both for your own internal, as well as for others to make use of. You'll learn how to structure Node modules, use npm, manage module dependencies, and so much more.

The one framework I always see compared to Derby.js is called Meteor. Similar to Derby, it handles things such as updating views live across multiple clients, though Meteor does it somewhat differently. While Derby is designed to be easier to use with different types of database systems, Meteor works closely with MongoDB. In fact, the client API for accessing the database is almost exactly like what you’d expect on the server-side with something likeMongoose.

While there are some drawbacks and controversies surrounding the framework (see Fibers vs Callbacks), Meteor looks like a pretty interesting option when creating an app that requires realtime feedback. Personally, I’m more attracted to the traditional callback style of programming of Derby, but the lack of robust documentation and a large developer community behind it is a huge blow to Derby’s usefulness. This will change over time, but at a much slower rate than Meteor, which recently received $11M+ in funding. This financial backing ensures that Meteor will remain around and supported, and for developers who need a financially and developmentally stable framework, the funding will only make Meteor more appealing.

Today, I want to go over how to create a really simple Meteor app. Essentially, this is a writeup for Tom’s Vimeo screencast. One major difference between my writeup and Tom’s video tutorial is the way we handle events in Meteor. Rather than copying and pasting code from one of Meteor’s examples, I take you step by step through a custom implementation of handling the enter key press to submit a message. Let’s begin!

ou're going to need to know how to get a webserver running with Express, and how to use app.get and app.post to communicate with both the server and the database. It's all covered in that original tutorial, and if you're a developer who's familiar with JavaScript, it's not hard.

Back? … or rolling your eyes and going, “dude, I already know that stuff”? Either way, great! Let's add some new tools to our toolbox, and create a simple little app that works without a single page refresh.
Here are the goals:
* Learn what REST means in plain English
* Store and retrieve JSON data in a MongoDB collection using HTTP POST and HTTP GET
* Remove data from the collection using HTTP DELETE
* Use AJAX for all data operations
* Update the DOM with jQuery

PART 1 - SERIOUSLY, WHAT THE HELL IS REST?
PART 2 - SETUP
PART 3 - STARTING IN ON HTML
PART 4 - THE DATABASE
PART 5 - LISTING USERS
PART 6 - POPULATING USER INFO
PART 7 - ADDING USERS
PART 8 - DELETING USERS
CONCLUSION

Building a Real-time SMS Voting App Part 1: Node.js & CouchDB
Building a Real-time SMS Voting App Part 2: Socket.io and Highcharts.js
Building a Real-time SMS Voting App Part 3: Scaling Node.js and CouchDB
Votr Part 4: AngularJS and Authentication with CouchDB
Votr Part 5: AngularJS and CRUD Using RESTful APIs

There's no shortage of Node.js tutorials out there, but most of them cover specific use cases or topics that only apply when you've already got Node up and running. I see comments every once and awhile that sound something like, "I've downloaded Node, now what?" This tutorial answers that question and explains how to get started from the very beginning.