sudo apt-get install python3-pip
sudo pip3 install virtualenv
This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.
Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:
getTweetsFor("domenic", function (err, results) {
// the rest of your code goes here.
// set-up a connection between the client and the server | |
var socket = io.connect(); | |
// let's assume that the client page, once rendered, knows what room it wants to join | |
var room = "abc123"; | |
socket.on('connect', function() { | |
// Connected, let's sign-up for to receive messages for this room | |
socket.emit('room', room); | |
}); |