Just Learning some NodeJS concepts

How to compile C++ node addons?

Sub-Directory : node-addon

1. Go to the source directory, here it is /node-addon/addon-src.

2. In this directory, run command node-gyp configure to configure the build process.

3. Run the command node-gyp build to build the addon. You will get a binary file inside /build/Release/<target_name>.node (target_name will be the target_name key which you specified in binding.gyp file)

How to use event emitters and process.nextTick?

Sub-Directory : cli-app-using-events

• Event emitters can be helpful in various aspects and can be an alternative to callbacks if you want to process the data in multiple ways. You can create multiple listeners to a single source and perform various tasks when the event is triggered.

• process.nextTick should be used carefully as it can be dangerous and might lead to ambigous results. Another alternative to it can be setImmediate.

• process.nextTick wait for the callstack to get empty before running the callback function passed to it. This can be helpful at various locations (example)

How to use the chat server?

Sub-Directory : create-server

• net module helps us to create web servers. It provides us with a duplex socket connection which can be used to create chat applications.

• Just start the application with node build/index.js net. The web server will start.

• Now to join the server via a client (we will be using netcat for it) run the command nc localhost 8000. You can create multiple clients to emulate a chat group.

• Messages are broadcasted to all the connected clients.