Execute a future in a seq, and recovered result (not stack safe)

gistfile2.txt

  type A[E,T] = (E, Try[T])
  def seqOfFuturesRecovered[T, E](elems: Seq[E])(func: E => Future[T])(implicit executionContext: ExecutionContext): Future[Seq[A[E,T]]] = {
    elems.foldLeft(Future(Seq.empty[A[E, T]])) { (acc, elem) =>
      acc.flatMap { prevSeq: Seq[(E, Try[T])] =>
        FutureOps(func(elem)).futureToTry.map( (elem, _)).map { prevSeq :+ _}
      }
    }
  }