Delayed for-loop for async operations Usage: dfor(tasks.length, function(i, next) { // Do task with i next(); }, function() { // All completed }

dfor.js

dfor = function(num, func, callback) {
  var i = -1;
  function next() {
    i++;
    if (i == num) {
      end();
    }else{
      func(i, next);
    }
  }
  function end() {
    callback();
  }
  next();
}