None

Value Members

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

   Definition Classes

   AnyRef

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

   Test two objects for inequality.

   Test two objects for inequality.

   returns

   true if !(this == that), false otherwise.

   Definition Classes

   Any

3. final def ##(): Int

   Equivalent to x.hashCode except for boxed numeric types and null.

   Equivalent to x.hashCode except for boxed numeric types and null. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For null returns a hashcode where null.hashCode throws a NullPointerException.

   returns

   a hash value consistent with ==

   Definition Classes

   AnyRef → Any

4. final def ==(arg0: AnyRef): Boolean

   Definition Classes

   AnyRef

5. final def ==(arg0: Any): Boolean

   Test two objects for equality.

   Test two objects for equality. The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

   returns

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

   Definition Classes

   Any

6. final def asInstanceOf[T0]: T0

   Cast the receiver object to be of type T0.

   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 expression 1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expression List(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 type.

   returns

   the receiver object.

   Definition Classes

   Any

   Exceptions thrown

   ClassCastException

   if the receiver object is not an instance of the erasure of type T0.

7. def clone(): AnyRef

   Create a copy of the receiver object.

   Create 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

   Annotations

   @throws()

   Note

   not specified by SLS as a member of AnyRef

8. def collect[B](pf: PartialFunction[Nothing, B]): Option[B]

   Returns a Some containing the result of applying pf to this Option's contained value, if this option is nonempty and pf is defined for that value.

   Returns a Some containing the result of applying pf to this Option's contained value, if this option is nonempty and pf is defined for that value. Returns None otherwise.

   pf

   the partial function.

   returns

   the result of applying pf to this Option's value (if possible), or None.

   Definition Classes

   Option

9. final def eq(arg0: AnyRef): Boolean

   Tests whether the argument (arg0) is a reference to the receiver object (this).

   Tests whether the argument (arg0) is a reference to the receiver object (this).

   The eq method implements an equivalence relation on non-null instances of AnyRef, and has three additional 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).

   returns

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

   Definition Classes

   AnyRef

10. def equals(arg0: Any): Boolean

    The equality method for reference types.

    The equality method for reference types. Default implementation delegates to eq.

    See also equals in Any.

    returns

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

    Definition Classes

    AnyRef → Any

11. final def exists(p: (Nothing) ⇒ Boolean): Boolean

    Returns true if this option is nonempty and the predicate p returns true when applied to this Option's value.

    Returns true if this option is nonempty and the predicate p returns true when applied to this Option's value. Otherwise, returns false.

    p

    the predicate to test

    Definition Classes

    Option

    Annotations

    @inline()

12. final def filter(p: (Nothing) ⇒ Boolean): Option[Nothing]

    Returns this Option if it is nonempty and applying the predicate p to this Option's value returns true.

    Returns this Option if it is nonempty and applying the predicate p to this Option's value returns true. Otherwise, return None.

    p

    the predicate used for testing.

    Definition Classes

    Option

    Annotations

    @inline()

13. final def filterNot(p: (Nothing) ⇒ Boolean): Option[Nothing]

    Returns this Option if it is nonempty and applying the predicate p to this Option's value returns false.

    Returns this Option if it is nonempty and applying the predicate p to this Option's value returns false. Otherwise, return None.

    p

    the predicate used for testing.

    Definition Classes

    Option

    Annotations

    @inline()

14. def finalize(): Unit

    Called by the garbage collector on the receiver object when there are no more references to the object.

    Called by the garbage collector on the receiver object when there are no more references to the object.

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

    Attributes

    protected[lang]

    Definition Classes

    AnyRef

    Annotations

    @throws()

    Note

    not specified by SLS as a member of AnyRef

15. final def flatMap[B](f: (Nothing) ⇒ Option[B]): Option[B]

    Returns the result of applying f to this Option's value if this Option is nonempty.

    Returns the result of applying f to this Option's value if this Option is nonempty. Returns None if this Option is empty. Slightly different from map in that f is expected to return an Option (which could be None).

    f

    the function to apply

    Definition Classes

    Option

    Annotations

    @inline()

    See also

    foreach

    ,

    map

16. def flatten[B](implicit ev: <:<[Nothing, Option[B]]): Option[B]

    Definition Classes

    Option

17. final def forall(p: (Nothing) ⇒ Boolean): Boolean

    Returns true if this option is empty or the predicate p returns true when applied to this Option's value.

    Returns true if this option is empty or the predicate p returns true when applied to this Option's value.

    p

    the predicate to test

    Definition Classes

    Option

    Annotations

    @inline()

18. final def foreach[U](f: (Nothing) ⇒ U): Unit

    Apply the given procedure f to the option's value, if it is nonempty.

    Apply the given procedure f to the option's value, if it is nonempty. Otherwise, do nothing.

    f

    the procedure to apply.

    Definition Classes

    Option

    Annotations

    @inline()

    See also

    flatMap

    ,

    map

19. def get: Nothing

    Returns the option's value.

    Returns the option's value.

    Definition Classes

    None → Option

    Exceptions thrown

    Predef.NoSuchElementException

    if the option is empty.

    Note

    The option must be nonEmpty.

20. final def getClass(): Class[_]

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

    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.

    Definition Classes

    AnyRef → Any

    Note

    not specified by SLS as a member of AnyRef

21. final def getOrElse[B >: Nothing](default: ⇒ B): B

    Returns the option's value if the option is nonempty, otherwise return the result of evaluating default.

    Returns the option's value if the option is nonempty, otherwise return the result of evaluating default.

    default

    the default expression.

    Definition Classes

    Option

    Annotations

    @inline()

22. def isDefined: Boolean

    Returns true if the option is an instance of Some, false otherwise.

    Returns true if the option is an instance of Some, false otherwise.

    Definition Classes

    Option

23. def isEmpty: Boolean

    Returns true if the option is None, false otherwise.

    Returns true if the option is None, false otherwise.

    Definition Classes

    None → Option

24. final def isInstanceOf[T0]: Boolean

    Test whether the dynamic type of the receiver object is T0.

    Test whether the dynamic type of the receiver object is T0.

    Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression 1.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 specified type.

    returns

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

    Definition Classes

    Any

25. def iterator: Iterator[Nothing]

    Returns a singleton iterator returning the Option's value if it is nonempty, or an empty iterator if the option is empty.

    Returns a singleton iterator returning the Option's value if it is nonempty, or an empty iterator if the option is empty.

    Definition Classes

    Option

26. final def map[B](f: (Nothing) ⇒ B): Option[B]

    Returns a Some containing the result of applying f to this Option's value if this Option is nonempty.

    Returns a Some containing the result of applying f to this Option's value if this Option is nonempty. Otherwise return None.

    f

    the function to apply

    Definition Classes

    Option

    Annotations

    @inline()

    Note

    This is similar to flatMap except here, f does not need to wrap its result in an Option.

    See also

    foreach

    ,

    flatMap

27. final def ne(arg0: AnyRef): Boolean

    Equivalent to !(this eq that).

    Equivalent to !(this eq that).

    returns

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

    Definition Classes

    AnyRef

28. final def nonEmpty: Boolean

    Returns false if the option is None, true otherwise.

    Returns false if the option is None, true otherwise.

    Definition Classes

    Option

    Note

    Implemented here to avoid the implicit conversion to Iterable.

29. final 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.

    Definition Classes

    AnyRef

    Note

    not specified by SLS as a member of AnyRef

30. final 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.

    Definition Classes

    AnyRef

    Note

    not specified by SLS as a member of AnyRef

31. final def orElse[B >: Nothing](alternative: ⇒ Option[B]): Option[B]

    Returns this Option if it is nonempty, otherwise return the result of evaluating alternative.

    Returns this Option if it is nonempty, otherwise return the result of evaluating alternative.

    alternative

    the alternative expression.

    Definition Classes

    Option

    Annotations

    @inline()

32. final def orNull[A1 >: Nothing](implicit ev: <:<[Null, A1]): A1

    Returns the option's value if it is nonempty, or null if it is empty.

    Returns the option's value if it is nonempty, or null if it is empty. Although the use of null is discouraged, code written to use Option must often interface with code that expects and returns nulls.

    Definition Classes

    Option

    Annotations

    @inline()

    Example:

    1. val initalText: Option[String] = getInitialText
       val textField = new JComponent(initalText.orNull,20)
       

33. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes

    AnyRef

34. final def toLeft[X](right: ⇒ X): Product with Serializable with Either[Nothing, X]

    Returns a Right containing the given argument right if this is empty, or a Left containing this Option's value if this Option is nonempty.

    Returns a Right containing the given argument right if this is empty, or a Left containing this Option's value if this Option is nonempty.

    right

    the expression to evaluate and return if this is empty

    Definition Classes

    Option

    Annotations

    @inline()

    See also

    toRight

35. def toList: List[Nothing]

    Returns a singleton list containing the Option's value if it is nonempty, or the empty list if the Option is empty.

    Returns a singleton list containing the Option's value if it is nonempty, or the empty list if the Option is empty.

    Definition Classes

    Option

36. final def toRight[X](left: ⇒ X): Product with Serializable with Either[X, Nothing]

    Returns a Left containing the given argument left if this Option is empty, or a Right containing this Option's value if this is nonempty.

    Returns a Left containing the given argument left if this Option is empty, or a Right containing this Option's value if this is nonempty.

    left

    the expression to evaluate and return if this is empty

    Definition Classes

    Option

    Annotations

    @inline()

    See also

    toLeft

37. final def wait(): Unit

    Definition Classes

    AnyRef

    Annotations

    @throws()

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

    Definition Classes

    AnyRef

    Annotations

    @throws()

39. final def wait(arg0: Long): Unit

    Definition Classes

    AnyRef

    Annotations

    @throws()

40. def withFilter(p: (Nothing) ⇒ Boolean): WithFilter

    Necessary to keep Option from being implicitly converted to Iterable in for comprehensions.

    Necessary to keep Option from being implicitly converted to Iterable in for comprehensions.

    Definition Classes

    Option