Error accumulation 1 naive approach

error_accumulation1.scala

 private def accumulateErrors[A,B](list: List[A], f: A => B): Either[List[Throwable], List[B]] = {
    val res = list.foldLeft(List[Error](), List[B]()) { case ((accError, accRes), item) =>
      Try(f(item)).toEither match {
        case Right(i) => (accError, accRes :+ i)
        case Left(e) => (accError :+ new Error(e), accRes)
      }
    }
    if(res._1.isEmpty) Right(res._2) else Left(res._1)
  }