Fork/Join IO

io-fork-join

var _ = require('underscore'),
    http = require('http'),
    URI = require('uri'),
    async = require('async');

var sendReq = function (s, cb) {
    // send a HTTP req, and pass error or result to the function arg
    // content omitted for brevity
};

var sources = ['http://www.google.com', 'http://twitter.com', 'http://www.ebay.com'];
var funcs = [];
_.each(sources, function (source) {
    funcs.push(function (s) {
        return function (callback) {
            sendReq(s, callback);
        };
    }(source));
});
async.parallel(funcs, function(err, res) {
    // process results
});