TraverseOps

Value Members

1. final def !=(arg0: Any): Boolean

   

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2. final def ##(): Int

   

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3. final def ==(arg0: Any): Boolean

   

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4. final def asInstanceOf[T0]: T0

   

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5. def clone(): AnyRef

   

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6. final def eq(arg0: AnyRef): Boolean

   

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7. def equals(arg0: Any): Boolean

   

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8. def finalize(): Unit

   

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9. final def getClass(): Class[_]

   

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10. def hashCode(): Int

    

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11. final def isInstanceOf[T0]: Boolean

    

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12. final def ne(arg0: AnyRef): Boolean

    

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13. final def notify(): Unit

    

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14. final def notifyAll(): Unit

    

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15. def sequence[G[_], B](implicit G: Applicative[G], ev: =:=[A, G[B]]): G[F[B]]

    
    See also

    Traverse.sequence Example:

    scala> import cats.std.list._
    scala> import cats.std.option._
    scala> import cats.syntax.traverse._
    scala> val x: List[Option[Int]] = List(Some(1), Some(2))
    scala> val y: List[Option[Int]] = List(None, Some(2))
    scala> x.sequence
    res0: Option[List[Int]] = Some(List(1, 2))
    scala> y.sequence
    res1: Option[List[Int]] = None

16. def sequenceU(implicit U: Unapply[Applicative, A]): M[F[A]]

    
    See also

    Traverse.sequenceU Example:

    scala> import cats.data.{Validated, ValidatedNel}
    scala> import cats.std.list._
    scala> import cats.syntax.traverse._
    scala> val x: List[ValidatedNel[String, Int]] = List(Validated.valid(1), Validated.invalid("a"), Validated.invalid("b")).map(_.toValidatedNel)
    scala> x.sequenceU
    res0: cats.data.ValidatedNel[String,List[Int]] = Invalid(OneAnd(a,List(b)))
    scala> x.sequence[ValidatedNel[String, ?], Int]
    res1: cats.data.ValidatedNel[String,List[Int]] = Invalid(OneAnd(a,List(b)))

17. final def synchronized[T0](arg0: ⇒ T0): T0

    

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18. def toString(): String

    

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19. def traverse[G[_], B](f: (A) ⇒ G[B])(implicit arg0: Applicative[G]): G[F[B]]

    
    See also

    Traverse.traverse Example:

    scala> import cats.data.Xor
    scala> import cats.std.list._
    scala> import cats.std.option._
    scala> import cats.syntax.traverse._
    scala> def parseInt(s: String): Option[Int] = Xor.catchOnly[NumberFormatException](s.toInt).toOption
    scala> List("1", "2", "3").traverse(parseInt)
    res0: Option[List[Int]] = Some(List(1, 2, 3))
    scala> List("1", "two", "3").traverse(parseInt)
    res1: Option[List[Int]] = None

20. def traverseM[G[_], B](f: (A) ⇒ G[F[B]])(implicit arg0: Applicative[G], F2: FlatMap[F]): G[F[B]]

    
    See also

    Traverse.traverseM Example:

    scala> import cats.data.Xor
    scala> import cats.std.list._
    scala> import cats.std.option._
    scala> import cats.syntax.traverse._
    scala> def parseInt(s: String): Option[Int] = Xor.catchOnly[NumberFormatException](s.toInt).toOption
    scala> val x = Option(List("1", "two", "3"))
    scala> x.traverseM(_.map(parseInt))
    res0: List[Option[Int]] = List(Some(1), None, Some(3))

21. def traverseU[GB](f: (A) ⇒ GB)(implicit U: Unapply[Applicative, GB]): M[F[A]]

    
    See also

    Traverse.traverse Example:

    scala> import cats.data.Xor
    scala> import cats.std.list._
    scala> import cats.syntax.traverse._
    scala> def parseInt(s: String): Xor[String, Int] = Xor.catchOnly[NumberFormatException](s.toInt).leftMap(_ => "no number")
    scala> val ns = List("1", "2", "3")
    scala> ns.traverseU(parseInt)
    res0: Xor[String, List[Int]] = Right(List(1, 2, 3))
    scala> ns.traverse[Xor[String, ?], Int](parseInt)
    res1: Xor[String, List[Int]] = Right(List(1, 2, 3))

22. final def wait(): Unit

    

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23. final def wait(arg0: Long, arg1: Int): Unit

    

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24. final def wait(arg0: Long): Unit

    

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