Packages

trait Optional[F[_]] extends AnyRef

Abstraction over a container/context which may or may not provide a value.

F

the container/context type

Self Type
Optional[F]
Source
Optional.scala
See also

syntax.OptionalOps

Linear Supertypes
AnyRef, Any
Known Subclasses
IsomorphismOptional
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. Optional
  2. AnyRef
  3. Any
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. All

Abstract Value Members

  1. abstract def pextract[B, A](fa: F[A]): \/[F[B], A]

    If fa has an a, return it; otherwise it must be universally quantified.

Concrete 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. def ?[A, X](fa: F[A])(some: ⇒ X, none: ⇒ X): X

    Returns some if this context is defined, otherwise none.

  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  7. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  8. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  9. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  10. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  11. def getOrElse[A](fa: F[A])(default: ⇒ A): A

    Returns the value within the context if defined or else the value of default.

  12. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. def isDefined[A](fa: F[A]): Boolean

    Returns true if a value is defined within the context.

  14. final def isEmpty[A](fa: F[A]): Boolean

    Returns true if no value is defined within the context.

  15. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  16. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  17. final def nonEmpty[A](fa: F[A]): Boolean

    Returns true if a value is defined within the context.

    Returns true if a value is defined within the context. This is an alias for isDefined.

  18. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  19. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  20. val optionalSyntax: OptionalSyntax[F]
  21. def orElse[A](fa: F[A])(alternative: ⇒ F[A]): F[A]

    Returns given context if it is defined or else the value of the alternative.

  22. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  23. def toMaybe[A](fa: F[A]): Maybe[A]

    Returns this context converted to the Maybe context.

  24. def toOption[A](fa: F[A]): Option[A]

    Returns this context converted to the Option context.

  25. def toString(): String
    Definition Classes
    AnyRef → Any
  26. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  27. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  28. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from AnyRef

Inherited from Any

Ungrouped