Build and process the queue

gistfile1.js

var i = 0, queue = [];

// Put some functions at the queue
queue.push(function(data, next) { console.log(++i, data); setTimeout(next, 1000); });
queue.push(function(data, next) { console.log(++i, data); setTimeout(next, 1000); });
queue.push(function(data, next) { console.log(++i, data); setTimeout(next, 1000); });
queue.push(function(data, next) { console.log(++i, data); setTimeout(next, 1000); });

process(queue, {
	stopCallback: function(data) { console.log('stop callback', data); }, // optional
	callback: function(data) { console.log('callback', data); }
});