class RequestVar[+A] extends OptVar[A]
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Instance Constructors
- new RequestVar()(implicit m: Manifest[A])
Type Members
- class WithFilter extends AnyRef
We need a whole WithFilter class to honor the "doesn't create a new collection" contract even though it seems unlikely to matter much in a collection with max size 1.
We need a whole WithFilter class to honor the "doesn't create a new collection" contract even though it seems unlikely to matter much in a collection with max size 1.
- Definition Classes
- OptVar
Value Members
- final def !=(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
- final def ##: Int
- Definition Classes
- AnyRef → Any
- final def ==(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
- final def asInstanceOf[T0]: T0
- Definition Classes
- Any
- def clone(): AnyRef
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.CloneNotSupportedException]) @native()
- final def collect[B](pf: PartialFunction[A, B])(implicit action: Action): Option[B]
Returns a scala.Some containing the result of applying
pf
to this scala.Option's contained value, if this option is nonempty andpf
is defined for that value.Returns a scala.Some containing the result of applying
pf
to this scala.Option's contained value, if this option is nonempty andpf
is defined for that value. ReturnsNone
otherwise.- pf
the partial function.
- returns
the result of applying
pf
to this scala.Option's value (if possible), orNone
.
- Definition Classes
- OptVar
- Annotations
- @inline()
// Returns Some(HTTP) because the partial function covers the case. Some("http") collect {case "http" => "HTTP"} // Returns None because the partial function doesn't cover the case. Some("ftp") collect {case "http" => "HTTP"} // Returns None because None is passed to the collect method. None collect {case value => value}
Example: - final def contains[A1 >: A](elem: A1)(implicit action: Action): Boolean
Tests whether the option contains a given value as an element.
Tests whether the option contains a given value as an element.
- elem
the element to test.
- returns
true
if the option has an element that is equal (as determined by==
) toelem
,false
otherwise.
- Definition Classes
- OptVar
// Returns true because Some instance contains string "something" which equals "something". Some("something") contains "something" // Returns false because "something" != "anything". Some("something") contains "anything" // Returns false when method called on None. None contains "anything"
Example: - final def eq(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- def equals(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef → Any
- final def exists(p: (A) => Boolean)(implicit action: Action): Boolean
Returns true if this option is nonempty and the predicate
p
returns true when applied to this scala.Option's value.Returns true if this option is nonempty and the predicate
p
returns true when applied to this scala.Option's value. Otherwise, returns false.- p
the predicate to test
- Definition Classes
- OptVar
- Annotations
- @inline()
- final def filter(p: (A) => Boolean)(implicit action: Action): Option[A]
Returns this scala.Option if it is nonempty and applying the predicate
p
to this scala.Option's value returns true.Returns this scala.Option if it is nonempty and applying the predicate
p
to this scala.Option's value returns true. Otherwise, returnNone
.- p
the predicate used for testing.
- Definition Classes
- OptVar
- Annotations
- @inline()
- final def filterNot(p: (A) => Boolean)(implicit action: Action): Option[A]
Returns this scala.Option if it is nonempty and applying the predicate
p
to this scala.Option's value returns false.Returns this scala.Option if it is nonempty and applying the predicate
p
to this scala.Option's value returns false. Otherwise, returnNone
.- p
the predicate used for testing.
- Definition Classes
- OptVar
- Annotations
- @inline()
- def finalize(): Unit
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.Throwable])
- final def flatMap[B](f: (A) => Option[B])(implicit action: Action): Option[B]
Returns the result of applying
f
to this scala.Option's value if this scala.Option is nonempty.Returns the result of applying
f
to this scala.Option's value if this scala.Option is nonempty. ReturnsNone
if this scala.Option is empty. Slightly different frommap
in thatf
is expected to return an scala.Option (which could beNone
).- f
the function to apply
- Definition Classes
- OptVar
- Annotations
- @inline()
- See also
map
foreach
- def flatten[B](implicit ev: <:<[A, Option[B]], action: Action): Option[B]
- Definition Classes
- OptVar
- final def fold[B](ifEmpty: => B)(f: (A) => B)(implicit action: Action): B
Returns the result of applying
f
to this scala.Option's value if the scala.Option is nonempty.Returns the result of applying
f
to this scala.Option's value if the scala.Option is nonempty. Otherwise, evaluates expressionifEmpty
.- ifEmpty
the expression to evaluate if empty.
- f
the function to apply if nonempty.
- Definition Classes
- OptVar
- Annotations
- @inline()
- Note
This is equivalent to
scala.Option map f getOrElse ifEmpty
.
- final def forall(p: (A) => Boolean)(implicit action: Action): Boolean
Returns true if this option is empty or the predicate
p
returns true when applied to this scala.Option's value.Returns true if this option is empty or the predicate
p
returns true when applied to this scala.Option's value.- p
the predicate to test
- Definition Classes
- OptVar
- Annotations
- @inline()
- final def foreach[U](f: (A) => U)(implicit action: Action): 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
- OptVar
- Annotations
- @inline()
- See also
map
flatMap
- def get(implicit action: Action): A
- Definition Classes
- OptVar
- def getAll(implicit action: Action): At
- Definition Classes
- RequestVar → OptVar
- final def getClass(): Class[_ <: AnyRef]
- Definition Classes
- AnyRef → Any
- Annotations
- @native()
- final def getOrElse[B >: A](default: => B)(implicit action: Action): 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
- OptVar
- Annotations
- @inline()
- def hashCode(): Int
- Definition Classes
- AnyRef → Any
- Annotations
- @native()
- def isDefined(implicit action: Action): Boolean
Returns true if the option is an instance of scala.Some, false otherwise.
Returns true if the option is an instance of scala.Some, false otherwise.
- Definition Classes
- OptVar
- def isEmpty(implicit action: Action): Boolean
Returns true if the option is
None
, false otherwise.Returns true if the option is
None
, false otherwise.- Definition Classes
- OptVar
- final def isInstanceOf[T0]: Boolean
- Definition Classes
- Any
- def iterator(implicit action: Action): Iterator[A]
Returns a singleton iterator returning the scala.Option's value if it is nonempty, or an empty iterator if the option is empty.
Returns a singleton iterator returning the scala.Option's value if it is nonempty, or an empty iterator if the option is empty.
- Definition Classes
- OptVar
- val key: String
- Attributes
- protected[this]
- Definition Classes
- OptVar
- final def map[B](f: (A) => B)(implicit action: Action): Option[B]
Returns a scala.Some containing the result of applying
f
to this scala.Option's value if this scala.Option is nonempty.Returns a scala.Some containing the result of applying
f
to this scala.Option's value if this scala.Option is nonempty. Otherwise returnNone
.- f
the function to apply
- Definition Classes
- OptVar
- Annotations
- @inline()
- Note
This is similar to
flatMap
except here,f
does not need to wrap its result in an scala.Option.- See also
flatMap
foreach
- final def ne(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- final def nonEmpty(implicit action: Action): Boolean
Returns false if the option is
None
, true otherwise.Returns false if the option is
None
, true otherwise.- Definition Classes
- OptVar
- Note
Implemented here to avoid the implicit conversion to Iterable.
- final def notify(): Unit
- Definition Classes
- AnyRef
- Annotations
- @native()
- final def notifyAll(): Unit
- Definition Classes
- AnyRef
- Annotations
- @native()
- final def orElse[B >: A](alternative: => Option[B])(implicit action: Action): Option[B]
Returns this scala.Option if it is nonempty, otherwise return the result of evaluating
alternative
.Returns this scala.Option if it is nonempty, otherwise return the result of evaluating
alternative
.- alternative
the alternative expression.
- Definition Classes
- OptVar
- Annotations
- @inline()
- final def orNull[A1 >: A](implicit ev: <:<[Null, A1], action: Action): 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 scala.Option must often interface with code that expects and returns nulls.- Definition Classes
- OptVar
- Annotations
- @inline()
val initalText: Option[String] = getInitialText val textField = new JComponent(initalText.orNull,20)
Example: - def remove()(implicit action: Action): Option[A]
- Definition Classes
- OptVar
- def set[B >: A](value: B)(implicit action: Action): Unit
- Definition Classes
- OptVar
- final def synchronized[T0](arg0: => T0): T0
- Definition Classes
- AnyRef
- final def toLeft[X](right: => X)(implicit action: Action): Either[A, X]
Returns a scala.util.Right containing the given argument
right
if this is empty, or a scala.util.Left containing this scala.Option's value if this scala.Option is nonempty.Returns a scala.util.Right containing the given argument
right
if this is empty, or a scala.util.Left containing this scala.Option's value if this scala.Option is nonempty.- right
the expression to evaluate and return if this is empty
- Definition Classes
- OptVar
- Annotations
- @inline()
- See also
toRight
- def toList(implicit action: Action): List[A]
Returns a singleton list containing the scala.Option's value if it is nonempty, or the empty list if the scala.Option is empty.
Returns a singleton list containing the scala.Option's value if it is nonempty, or the empty list if the scala.Option is empty.
- Definition Classes
- OptVar
- def toOption(implicit action: Action): Option[A]
- Definition Classes
- OptVar
- final def toRight[X](left: => X)(implicit action: Action): Either[X, A]
Returns a scala.util.Left containing the given argument
left
if this scala.Option is empty, or a scala.util.Right containing this scala.Option's value if this is nonempty.Returns a scala.util.Left containing the given argument
left
if this scala.Option is empty, or a scala.util.Right containing this scala.Option's value if this is nonempty.- left
the expression to evaluate and return if this is empty
- Definition Classes
- OptVar
- Annotations
- @inline()
- See also
toLeft
- def toString(): String
- Definition Classes
- AnyRef → Any
- final def wait(): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- final def wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- final def wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException]) @native()
- final def withFilter(p: (A) => Boolean)(implicit action: Action): WithFilter
Necessary to keep scala.Option from being implicitly converted to scala.collection.Iterable in
for
comprehensions.Necessary to keep scala.Option from being implicitly converted to scala.collection.Iterable in
for
comprehensions.- Definition Classes
- OptVar
- Annotations
- @inline()