sync vs async loop over

syncVSasyncLoopOver.js

function getParam(x) { }

function myFunc(argument) { }

function myAsyncFunc(argument) { return new Promise(function(resolve, reject) { /* ... */ }); }

//========== sync loop over
for (var i = 0; i < l; i++) {
  try {
    var result = myFunc(getParam(i));
    console.log(result);
  } catch (ex) {
    console.error(ex);
  }
}
console.log('TADA!');

//========== async loop over

asyncLooper().then(function() {
  console.log('TADA!');
});

function asyncLooper() {
  var promiseI = 0;

  return control();

  function control() {
    if (promiseI < l) {
      return handler(myAsyncFunc(getParam(promiseI)));
    }
    else {
      return Promise.resolve();
    }
  }

  function handler(crntPromise) {
    return crntPromise
    .then(function(result){
      console.log(result);
    }).catch(function(error){
      console.error(error);
    })
    .then(function(){
      promiseI++;
    })
    .then(function () {
      return control();
    });
  }
}