output.log

data/FY2013-actual.csv
data/FY2013-actual.csv

test.js

var async = require('async');

var tasks = [],
	filenames = ['data/FY2014-actual.csv', 'data/FY2013-actual.csv'];
	
for(var i in filenames) {
	tasks.push(function(callback) {
		console.log(filenames[i]);
		callback();
	});
}

async.parallel(tasks, function(err, results) {
});