async-countdown

async_countdown.js

var fs = require('fs');
var files = fs.readdirSync("./test");
var everybody = "";
var doneCount = files.length;
var i;

for (i = 0; i < files.length; ++i) {
  fs.readFile("./test/" + files[i], function(err, data) {
    if (err != null) throw new Error(err);

    everybody += data;
    if (--doneCount === 0)
      console.log(everybody);
  });
}