Maria Rabyk MariiaRa
MariiaRa
/ left.scala
Created
February 12, 2019 10:54
— forked from HerringtonDarkholme/left.scala
foldLeft and foldRight
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| def retry(noTimes: Int)(block: ⇒Future[T]): Future[T] = { | |
| val ns: Iterator[Int] = (1 to noTimes).iterator | |
| val attempts: Iterator[Future[T]] = ns.map(_⇒ ()⇒block) | |
| val failed = Future.failed(new Exception) | |
| attempts.foldLeft(failed) | |
| ((a,block) ⇒ a recoverWith { block() }) | |
| } | |
| retry(3) { block } | |
| = unfolds to |