Executing a handler after an async function has finnished it's parallel tasks

[ghost]

I have an async function that executes some shell commands in parallel

require("fs").readdir("./", function (error, folders) { // asynched
    require("underscore")._(folders).each(function (folder, folderKey, folderList) { // asynched
    r("child_process").exec("ls ./" + folder, function(error, stdout, stderr) {
           console.log("Cant put it here") // Will be run after the first execution is completed
        })
        console.log("Cant put it here either") // Will be run immediately before any execution is completed
    })
    console.log("Cant put it here either") // Will be run immediately before any execution is completed
})

I want to do something after those shell commands are executed but I cant figure out how to do this with async library. Those shell commands are executed in parallel, so there is no way to register a handler that is executed after all of them are executed.

Any ideas?

[ghost]

A Stackoverflow question I posted for this issue: http://stackoverflow.com/questions/4357391/running-serial-operations-in-node-js

[caolan]

I've posted a response on Stackoverflow, hope that helps.