scala

Either

class Either[+A, +B] extends AnyRef

The Either type represents a value of one of two possible types (a disjoint union) . The data constructors Left and Right represent the two possible values. The Either type is often used as an alternative to scala.Option where Left represents failure (by convention) and Right is akin to Some.

attributes: sealed abstract
go to: companion
known subclasses: Left, Right
source: Either.scala
    version
  1. 1 . 0, 11/10/2008

    since
  1. 2 . 7

    authors:
  1. Tony Morris, Workingmouse

Inherited
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Visibility
  1. Public
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Instance constructors

  1. new Either()

Value Members

  1. def !=(arg0: AnyRef): Boolean

  2. def !=(arg0: Any): Boolean

    o != arg0 is the same as !(o == (arg0)).

  3. def ##(): Int

  4. def $asInstanceOf[T0](): T0

  5. def $isInstanceOf[T0](): Boolean

  6. def ==(arg0: AnyRef): Boolean

    o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).

  7. def ==(arg0: Any): Boolean

    o == arg0 is the same as o.equals(arg0).

  8. def asInstanceOf[T0]: T0

    This method is used to cast the receiver object to be of type T0.

  9. def clone(): AnyRef

    This method creates and returns a copy of the receiver object .

  10. def eq(arg0: AnyRef): Boolean

    This method is used to test whether the argument (arg0) is a reference to the receiver object (this).

  11. def equals(arg0: Any): Boolean

    This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.

  12. def finalize(): Unit

    This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object .

  13. def fold[X](fa: (A) ⇒ X, fb: (B) ⇒ X): X

    Deconstruction of the Either type (in contrast to pattern matching) .

  14. def getClass(): java.lang.Class[_ <: java.lang.Object]

    Returns a representation that corresponds to the dynamic class of the receiver object .

  15. def hashCode(): Int

    Returns a hash code value for the object .

  16. def isInstanceOf[T0]: Boolean

    This method is used to test whether the dynamic type of the receiver object is T0.

  17. def isLeft: Boolean

    Returns true if this is a Left, false otherwise .

  18. def isRight: Boolean

    Returns true if this is a Right, false otherwise .

  19. def joinLeft[A1 >: A, B1 >: B, C](implicit ev: <:<[A1, Either[C, B1]]): Either[C, B1]

    Joins an Either through Left .

  20. def joinRight[A1 >: A, B1 >: B, C](implicit ev: <:<[B1, Either[A1, C]]): Either[A1, C]

    Joins an Either through Right .

  21. def left: LeftProjection[A, B]

    Projects this Either as a Left .

  22. def ne(arg0: AnyRef): Boolean

    o.ne(arg0) is the same as !(o.eq(arg0)).

  23. def notify(): Unit

    Wakes up a single thread that is waiting on the receiver object's monitor .

  24. def notifyAll(): Unit

    Wakes up all threads that are waiting on the receiver object's monitor .

  25. def right: RightProjection[A, B]

    Projects this Either as a Right .

  26. def swap: Product with Either[B, A]

    If this is a Left, then return the left value in Right or vice versa .

  27. def synchronized[T0](arg0: T0): T0

  28. def toString(): String

    Returns a string representation of the object .

  29. def wait(): Unit

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

  31. def wait(arg0: Long): Unit