Callback after all asynchronous forEach callbacks are completed

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As the title suggests. How do I do this?

I want to call whenAllDone() after the forEach-loop has gone through each element and done some asynchronous processing.

[1, 2, 3].forEach(
  function(item, index, array, done) {
     asyncFunction(item, function itemDone() {
       console.log(item + " done");
       done();
     });
  }, function allDone() {
     console.log("All done");
     whenAllDone();
  }
);

Possible to get it to work like this? When the second argument to forEach is a callback function which runs once it went through all iterations?

Expected output:

3 done
1 done
2 done
All done!

14 Answers
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