Sharing variables across files in node.js without using global variables
One of the ways is by passing the object as argument to function (as already has been described in @Thomas' answer).
Other way is to create a new file say 'global.js'. put only those items in this file that you want to be global. e.g.
var Global = { io : { }}; module.exports = Global;Now, in your app.js,
var app = express(), server = require('http').createServer(app), global = require('./global.js');global.io = require('socket.io').listen(server);require('./socket');And in your socket.js:
var global = require('./global.js');global.io.sockets.on('connection', function(socket) { //xxx}Hope it helps...