Scala 3/scala/Option

Option

object Option
Companion:
class
Source:
Option.scala
trait Sum
trait Mirror
class Object
trait Matchable
class Any

Type members

Inherited types

type MirroredElemLabels <: Tuple

The names of the product elements

The names of the product elements

Inherited from:
Mirror
Source:
Mirror.scala
type MirroredLabel <: String

The name of the type

The name of the type

Inherited from:
Mirror
Source:
Mirror.scala

Value members

Concrete methods

def apply[A](x: A): Option[A]

An Option factory which creates Some(x) if the argument is not null, and None if it is null.

An Option factory which creates Some(x) if the argument is not null, and None if it is null.

Value parameters:
x

the value

Returns:

Some(value) if value != null, None if value == null

Source:
Option.scala
def empty[A]: Option[A]

An Option factory which returns None in a manner consistent with the collections hierarchy.

An Option factory which returns None in a manner consistent with the collections hierarchy.

Source:
Option.scala
def unless[A](cond: Boolean)(a: => A): Option[A]

Unless a given condition is true, this will evaluate the a argument and return Some(a).

Unless a given condition is true, this will evaluate the a argument and return Some(a). Otherwise, a is not evaluated and None is returned.

Source:
Option.scala
def when[A](cond: Boolean)(a: => A): Option[A]

When a given condition is true, evaluates the a argument and returns Some(a).

When a given condition is true, evaluates the a argument and returns Some(a). When the condition is false, a is not evaluated and None is returned.

Source:
Option.scala

Implicits

Implicits

implicit def option2Iterable[A](xo: Option[A]): Iterable[A]

An implicit conversion that converts an option to an iterable value

An implicit conversion that converts an option to an iterable value

Source:
Option.scala