Packages

final case class OneAnd[F[_], A](head: A, tail: F[A]) extends Product with Serializable

A generalization of NonEmptyList to non-List things. For example, OneAnd[Vector, A] is a non-empty Vector of A.

Only head and tail are provided as direct methods, because there's little you can do with a OneAnd without knowing a bit about F. So useful functions are provided in the form of typeclass instances on OneAnd's companion; in combination with syntax extensions provided by scalaz.syntax, OneAnd has a large possible set of methods available by importing. For example, Applicative on this requires ApplicativePlus[F], and Traverse1 on this requires Traverse[F]. See the companion documentation for a complete list of instances.

Additionally, unlike λ[α => (α, F[α])], the behavior of typeclass operations on OneAnd should be preserved across the natural transformation to scalaz.NonEmptyList where one exists. That is it should "be like" a nonempty structure. For example, ap-ing two OneAnd[Vector, ?]s or NonEmptyLists of lengths *a* and *b* yields a sequence of same type of length *a*×*b*, but two λ[α => (α, Vector[α])]s of length *c* and *d* ap to one of length 1+(*c*–1)×(*d*–1). For another example, point of the former two yield a one-element sequence, but point of the latter yields a two-element sequence.

Source
OneAnd.scala
Since

7.0.3

Linear Supertypes
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. OneAnd
  2. Serializable
  3. Product
  4. Equals
  5. AnyRef
  6. Any
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. All

Instance Constructors

  1. new OneAnd(head: A, tail: F[A])

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  8. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  9. val head: A
  10. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  11. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  12. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  13. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  14. def productElementNames: Iterator[String]
    Definition Classes
    Product
  15. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  16. val tail: F[A]
  17. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  18. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  19. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

Ungrouped