Convert list of futures to future of list of successes and future of list of failures (List[Future[T]] to (Future[List[T]], Future[List[Throwable]]))

list-of-futures-to-future-list.scala

import scala.concurrent.{ExecutionContext, Future}
import scala.util.{Failure, Success, Try}

object FutureHelper {
  def partition[T](futures: List[Future[T]])(implicit executor: ExecutionContext): (Future[List[T]], Future[List[Throwable]]) = {
    val futuresOfTry: List[Future[Try[T]]] = futures.map(_.transform(Success(_)))

    val successes = Future.sequence(futuresOfTry)
      .map(_.collect { case Success(x) => x })
    val failures = Future.sequence(futuresOfTry)
      .map(_.collect { case Failure(x) => x })

    (successes, failures)
  }
}