None<A> class
Properties
-
hashCode
→ int
-
The hash code for this object.
no setteroverride
-
isDefined
→ bool
-
True if Some of A else false
no setterinherited
-
isEmpty
→ bool
-
True if None else false
no setterinherited
-
runtimeType
→ Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
contains(A candidate)
→ bool
-
Return
true if this Option is a Some and value inside equal candidate
inherited
-
exists(bool predicate(A a))
→ bool
-
Return
true if this option is nonempty and the predicate returns true Otherwise return false
inherited
-
filter(bool predicate(A a))
→ Option<A>
-
Return current Option if it's nonempty and
predicate application return true. Otherwise return None
inherited
-
flatMap<Z>(Option<Z> f(A a))
→ Option<Z>
-
Return Application of
f on a inside Some if isDefined else None
inherited
-
fold<Z>(Z onNone(), Z onSome(A a))
→ Z
-
Applies
onNone if this is a None or onSome if this is a Some of A
override
-
getOrElse(A? caseElse())
→ A?
-
Return
a inside Some else supplied caseElse if None
inherited
-
map<Z>(Z f(A a))
→ Option<Z>
-
Return Some of Application of
f on a inside Some if isDefined else None
inherited
-
noSuchMethod(Invocation invocation)
→ dynamic
-
Invoked when a nonexistent method or property is accessed.
inherited
-
orElse<B>(Option<B> caseElse())
→ Option
-
Return inchanged Option if Some else supplied
caseElse if None
inherited
-
toEither<L>(L leftValue)
→ Either<L, A>
-
Consider that None is a Left and Some is a Right(a)
inherited
-
toLeft(A caseNone)
→ Either<A, A>
-
Return Left from Option
inherited
-
toRight(A caseNone)
→ Either<A, A>
-
Return Right from Option
inherited
-
toString()
→ String
-
A string representation of this object.
inherited
