Asynchronous ForEach made by Zef Hemel

gistfile1.js

//http://zef.me/3420/async-foreach-in-javascript

function asyncParForEach(array, fn, callback) {
  var completed = 0;
  if(array.length === 0) {
    callback(); // done immediately
  }
  var len = array.length;
  for(var i = 0; i < len; i++) {
    fn(array[i], function() {
        completed++;
        if(completed === array.length) {
          callback();
        }
      });
  }
};