List[Try[T]] to Try[List[T]] in Scala

Question

I would like to know how to convert a List[Try[T]] into Try[List[T]] in Scala?

I have tried using an accumulator and folding right but it do

Answer 1

Cats is a nice way to go but it can be done via the Standard Library without too much complication.

import util.{Try, Success, Failure}

def seqnc[T](lst :List[Try[T]]) :Try[List[T]] =
  lst.foldRight(Try(List.empty[T])) {
    case (tt, acc) => for { t <- tt
                            a <- acc
                          } yield t :: a
  }