object None in scala

def isEmpty : Boolean

True if the option is the None value, false otherwise.

Overrides: Option.isEmpty

def get : Nothing

get the value of this option. @requires that the option is nonEmpty.

Throws: Predef.NoSuchElementException - if the option is empty.

Overrides: Option.get

override final def toString : java.lang.String

Returns a string representation of the object.

The default representation is platform dependent.

Returns: a string representation of the object.

override def productPrefix : java.lang.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.

override def productArity : Int

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

override def productElement(arg0 : Int) : Any

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

Parameters: n - the index of the element to return
Throws: IndexOutOfBoundsException -
Returns: The element n elements after the first element

override 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. See Programming in Scala, Chapter 28 for discussion and design.

protected def readResolve : AnyRef

Method Summary
`override 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. See Programming in Scala, Chapter 28 for discussion and design.
`def`	get : Nothing get the value of this option. @requires that the option is nonEmpty.
`def`	isEmpty : Boolean True if the option is the `None` value, false otherwise.
`override def`	productArity : Int return k for a product `A(x_1,...,x_k)`
`override def`	productElement (arg0 : Int) : Any for a product `A(x_1,...,x_k)`, returns `x_(n+1)` for `0 <= n < k`
`override def`	productPrefix : java.lang.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.
`protected def`	readResolve : AnyRef
`override final def`	toString : java.lang.String Returns a string representation of the object.

Methods inherited from Option
isDefined, getOrElse, orNull, map, flatMap, filter, exists, foreach, partialMap, orElse, iterator, toList, toRight, toLeft

Methods inherited from Product
productIterator, productElements

Methods inherited from AnyRef
getClass, hashCode, equals, clone, notify, notifyAll, wait, wait, wait, finalize, ==, !=, eq, ne, synchronized

Methods inherited from Any
==, !=, isInstanceOf, asInstanceOf

	Scala Library

	Scala Library