Demonstrating three different ways to delete files whose names are stored in an array.

sync-callbacks-promises.js

var companies = [/* ... */];

/* WITH SYNC */
var fs = require("fs");

companies.forEach(fs.unlinkSync(company)); // this is blocking
console.log("All files deleted");

/* WITH CALLBACKS */
var fs = require("fs");

var unlinkCount = companies.length;
companies.forEach(function (company) {
  fs.unlink(company, function () {
    unlinkCount--;
    if (unlinkCount === 0)
      console.log("All files deleted");
  });
});

/* WITH PROMISES */
var fs = require("q-io/fs");
var Promise = require("q");

var companyDeletionPromises = companies.map(fs.remove(company));
Promise.all(companyDeletionPromises).done(function () {
  console.log("All files deleted");
});