final class ListOps[A] extends AnyVal
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Instance Constructors
- new ListOps(la: List[A])
Value Members
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final
def
!=(arg0: Any): Boolean
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final
def
##(): Int
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final
def
==(arg0: Any): Boolean
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final
def
asInstanceOf[T0]: T0
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def
getClass(): Class[_ <: AnyVal]
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def
groupByNel[B](f: (A) ⇒ B)(implicit B: Order[B]): SortedMap[B, NonEmptyList[A]]
Groups elements inside this
Listaccording to theOrderof the keys produced by the given mapping function.Groups elements inside this
Listaccording to theOrderof the keys produced by the given mapping function.scala> import cats.data.NonEmptyList scala> import scala.collection.immutable.SortedMap scala> import cats.implicits._ scala> val list = List(12, -2, 3, -5) scala> val expectedResult = SortedMap(false -> NonEmptyList.of(-2, -5), true -> NonEmptyList.of(12, 3)) scala> list.groupByNel(_ >= 0) === expectedResult res0: Boolean = true
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def
groupByNelA[F[_], B](f: (A) ⇒ F[B])(implicit F: Applicative[F], B: Order[B]): F[SortedMap[B, NonEmptyList[A]]]
Groups elements inside this
Listaccording to theOrderof the keys produced by the given mapping monadic function.Groups elements inside this
Listaccording to theOrderof the keys produced by the given mapping monadic function.scala> import cats.data.NonEmptyList scala> import scala.collection.immutable.SortedMap scala> import cats.implicits._ scala> val list = List(12, -2, 3, -5) scala> val expectedResult = Option(SortedMap(false -> NonEmptyList.of(-2, -5), true -> NonEmptyList.of(12, 3))) scala> list.groupByNelA(num => Option(0).map(num >= _)) === expectedResult res0: Boolean = true
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final
def
isInstanceOf[T0]: Boolean
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def
scanLeftNel[B](b: B)(f: (B, A) ⇒ B): NonEmptyList[B]
Produces a
NonEmptyListcontaining cumulative results of applying the operator going left to right.Produces a
NonEmptyListcontaining cumulative results of applying the operator going left to right.Example:
scala> import cats.data.NonEmptyList scala> import cats.implicits._ scala> val result1: List[Int] = List(1, 2) scala> result1.scanLeftNel(100)(_ + _) res0: NonEmptyList[Int] = NonEmptyList(100, 101, 103) scala> val result2: List[Int] = List.empty[Int] scala> result2.scanLeftNel(1)(_ + _) res1: NonEmptyList[Int] = NonEmptyList(1)
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def
scanRightNel[B](b: B)(f: (A, B) ⇒ B): NonEmptyList[B]
Produces a
NonEmptyListcontaining cumulative results of applying the operator going right to left.Produces a
NonEmptyListcontaining cumulative results of applying the operator going right to left.Example:
scala> import cats.data.NonEmptyList scala> import cats.implicits._ scala> val result1: List[Int] = List(1, 2) scala> result1.scanRightNel(100)(_ + _) res0: NonEmptyList[Int] = NonEmptyList(103, 102, 100) scala> val result2: List[Int] = List.empty[Int] scala> result2.scanRightNel(1)(_ + _) res1: NonEmptyList[Int] = NonEmptyList(1)
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def
toNel: Option[NonEmptyList[A]]
Returns an Option of NonEmptyList from a List
Returns an Option of NonEmptyList from a List
Example:
scala> import cats.data.NonEmptyList scala> import cats.implicits._ scala> val result1: List[Int] = List(1, 2) scala> result1.toNel res0: Option[NonEmptyList[Int]] = Some(NonEmptyList(1, 2)) scala> val result2: List[Int] = List.empty[Int] scala> result2.toNel res1: Option[NonEmptyList[Int]] = None
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def
toString(): String
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