Async functions inside forEach loops with js [duplicate]

Answer 1

I tend to use a little utility function like this:

​function asyncCallback( iterations, onComplete ){
  var total = iterations.length || iterations, count = 0;
  return function( func ){
    func();
    if ( ++count == total ) onComplete();
  };
}

var arr = [1,2,3];

var async = asyncCallback(arr, function(){
  console.log('donezo!');
});

arr.forEach(function(num){
  setTimeout(function(){
    async(function(){
      console.log(num);
    });
  }, 200);
});

​