Question

A version of Sequence#indexOf which returns an AsyncHandle.

Signature

AsyncSequence.indexOf = function(value) { /*...*/ }

AsyncSequence.indexOf = function indexOf(value) {
  var foundIndex = -1;

  var handle = this.each(function(e, i) {
if (e === value) {
  foundIndex = i;
  return false;
}
  });

  return handle.then(function() {
return foundIndex;
  });
}

Name	Type(s)	Description
value	*	The element to search for in the sequence.
returns	AsyncHandle	An AsyncHandle (promise) which resolves to the found index, once it is detected, or -1.