scala.Either

LeftProjection

case class LeftProjection [+A, +B] (e: Either[A, B]) extends Product

Projects an Either into a Left.

attributes: final
go to: companion
linear super types: Product, Equals, AnyRef, Any
source: Either.scala
    version
  1. 1.0, 11/10/2008

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  1. LeftProjection
  2. Product
  3. Equals
  4. AnyRef
  5. Any
Visibility
  1. Public
  2. All
Impl.
  1. Concrete
  2. Abstract

Instance constructors

  1. new LeftProjection (e: Either[A, B])

Value Members

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

    attributes: final
    definition classes: AnyRef
  2. def != (arg0: Any) : Boolean

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

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

    arg0

    the object to compare against this object for dis-equality.

    returns

    false if the receiver object is equivalent to the argument; true otherwise.

    attributes: final
    definition classes: Any
  3. def ## () : Int

    attributes: final
    definition classes: AnyRef → Any
  4. def $asInstanceOf [T0] () : T0

    attributes: final
    definition classes: AnyRef
  5. def $isInstanceOf [T0] () : Boolean

    attributes: final
    definition classes: AnyRef
  6. def == (arg0: AnyRef) : Boolean

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

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

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    attributes: final
    definition classes: AnyRef
  7. def == (arg0: Any) : Boolean

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

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

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    attributes: final
    definition classes: Any
  8. def asInstanceOf [T0] : T0

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

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

    Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expressionList(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested typed.

    returns

    the receiver object.

    attributes: final
    definition classes: Any
  9. def canEqual (arg0: Any) : Boolean

    A method that should be called from every well-designed equals method that is open to be overridden in a subclass.

    A method that should be called from every well-designed equals method that is open to be overridden in a subclass. See Programming in Scala, Chapter 28 for discussion and design.

    definition classes: LeftProjectionEquals
  10. def clone () : AnyRef

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

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

    The default implementation of the clone method is platform dependent.

    returns

    a copy of the receiver object.

    attributes: protected[lang]
    definition classes: AnyRef
  11. val e : Either[A, B]

  12. def eq (arg0: AnyRef) : Boolean

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

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

    The eq method implements an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation] on non-null instances of AnyRef: * It is reflexive: for any non-null instance x of type AnyRef, x.eq(x) returns true. * It is symmetric: for any non-null instances x and y of type AnyRef, x.eq(y) returns true if and only if y.eq(x) returns true. * It is transitive: for any non-null instances x, y, and z of type AnyRef if x.eq(y) returns true and y.eq(z) returns true, then x.eq(z) returns true.

    Additionally, the eq method has three other properties. * It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false. * For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false. * null.eq(null) returns true.

    When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).

    arg0

    the object to compare against this object for reference equality.

    returns

    true if the argument is a reference to the receiver object; false otherwise.

    attributes: final
    definition classes: AnyRef
  13. def equals (arg0: Any) : Boolean

    The equality method defined in AnyRef.

    The equality method defined in AnyRef[email protected] true if the receiver object is equivalent to the argument; false otherwise. */

    definition classes: LeftProjectionEquals → AnyRef → Any
  14. def exists (f: (A) ⇒ Boolean) : Boolean

    Returns false if Right or returns the result of the application of the given function to the Left value.

    Returns false if Right or returns the result of the application of the given function to the Left value.

  15. def filter [Y] (p: (A) ⇒ Boolean) : Option[Either[A, Y]]

    Returns None if this is a Right or if the given predicatep does not hold for the left value, otherwise, returns a Left.

    Returns None if this is a Right or if the given predicatep does not hold for the left value, otherwise, returns a Left.

  16. 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.

    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.

    The details of when and if the finalize method are invoked, as well as the interaction between finalizeand non-local returns and exceptions, are all platform dependent.

    attributes: protected[lang]
    definition classes: AnyRef
  17. def flatMap [BB >: B, X] (f: (A) ⇒ Either[X, BB]) : Either[X, BB]

    Binds the given function across Left.

    Binds the given function across Left.

  18. def forall (f: (A) ⇒ Boolean) : Boolean

    Returns true if Right or returns the result of the application of the given function to the Left value.

    Returns true if Right or returns the result of the application of the given function to the Left value.

  19. def foreach [U] (f: (A) ⇒ U) : Any

    Executes the given side-effect if this is a Left.

    Executes the given side-effect if this is a Left.

  20. def get : A

    Returns the value from this Left or throws Predef.NoSuchElementExceptionif this is a Right.

    Returns the value from this Left or throws Predef.NoSuchElementExceptionif this is a Right.

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

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

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

    The nature of the representation is platform dependent.

    returns

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

    attributes: final
    definition classes: AnyRef
  22. def getOrElse [AA >: A] (or: ⇒ AA) : AA

    Returns the value from this Left or the given argument if this is aRight.

    Returns the value from this Left or the given argument if this is aRight.

  23. def hashCode () : Int

    Returns a hash code value for the object.

    Returns a hash code value for the object.

    The default hashing algorithm is platform dependent.

    Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)) yet not be equal (o1.equals(o2) returns false). A degenerate implementation could always return 0. However, it is required that if two objects are equal (o1.equals(o2) returns true) that they have identical hash codes (o1.hashCode.equals(o2.hashCode)). Therefore, when overriding this method, be sure to verify that the behavior is consistent with the equals method.

    returns

    the hash code value for the object.

    definition classes: LeftProjection → AnyRef → Any
  24. def isInstanceOf [T0] : Boolean

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

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

    Note that the test result of the test is modulo Scala's erasure semantics. Therefore the expression1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested typed.

    returns

    true if the receiver object is an instance of erasure of type T0; false otherwise.

    attributes: final
    definition classes: Any
  25. def map [X] (f: (A) ⇒ X) : Product with Either[X, B]

    Maps the function argument through Left.

    Maps the function argument through Left.

  26. def ne (arg0: AnyRef) : Boolean

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

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

    arg0

    the object to compare against this object for reference dis-equality.

    returns

    false if the argument is not a reference to the receiver object; true otherwise.

    attributes: final
    definition classes: AnyRef
  27. def notify () : Unit

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

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

    attributes: final
    definition classes: AnyRef
  28. def notifyAll () : Unit

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

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

    attributes: final
    definition classes: AnyRef
  29. def productArity : Int

    return k for a product A(x_1,...,x_k)

    return k for a product A(x_1,...,x_k)

    definition classes: LeftProjectionProduct
  30. def productElement (arg0: Int) : Any

    For a product A(x_1,...,x_k), returns x_(n+1) for 0 <= n < k

    For a product A(x_1,...,x_k), returns x_(n+1) for 0 <= n < k

    returns

    The element n elements after the first element

    definition classes: LeftProjectionProduct
  31. def productElements : Iterator[Any]

    definition classes: Product
      deprecated:
    1. use productIterator instead

  32. def productIterator : Iterator[Any]

    An iterator that returns all fields of this product

    An iterator that returns all fields of this product

    definition classes: Product
  33. def productPrefix : String

    By default the empty string.

    By default the empty string. Implementations may override this method in order to prepend a string prefix to the result of the toString methods.

    definition classes: LeftProjectionProduct
  34. def synchronized [T0] (arg0: T0) : T0

    attributes: final
    definition classes: AnyRef
  35. def toOption : Option[A]

    Returns a Some containing the Left value if it exists or aNone if this is a Right.

    Returns a Some containing the Left value if it exists or aNone if this is a Right.

  36. def toSeq : Seq[A]

    Returns a Seq containing the Left value if it exists or an emptySeq if this is a Right.

    Returns a Seq containing the Left value if it exists or an emptySeq if this is a Right.

  37. def toString () : String

    Returns a string representation of the object.

    Returns a string representation of the object.

    The default representation is platform dependent.

    returns

    a string representation of the object.

    definition classes: LeftProjection → AnyRef → Any
  38. def wait () : Unit

    attributes: final
    definition classes: AnyRef
  39. def wait (arg0: Long, arg1: Int) : Unit

    attributes: final
    definition classes: AnyRef
  40. def wait (arg0: Long) : Unit

    attributes: final
    definition classes: AnyRef

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any