SeqEitherNel.scala

import cats.data.EitherNel
import cats.data.NonEmptyList
import cats.implicits._

object SeqEitherNel {

  def main(args: Array[String]): Unit = {

    def data =
      (1 to 5).map {
        case i if i % 2 == 0 => Right(i)
        case i               => Left(NonEmptyList.one(i.toString))
      }.toList
    val eithers: List[Either[NonEmptyList[String], Int]] = data
//    val eithers: List[EitherNel[String, Int]] = data // could not find implicit value for parameter G: cats.Bifoldable[cats.data.EitherNel]
    val a: (List[NonEmptyList[String]], List[Int]) =
      eithers.separate

    println(a)
  }

}