Some<T> class
- Inheritance
-
- Available extensions
Constructors
-
Some(T _value)
-
const
Properties
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hashCode
→ int
-
The hash code for this object.
no setteroverride
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runtimeType
→ Type
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A representation of the runtime type of the object.
no setterinherited
-
value
→ T
-
Extract value of type
T inside the Some.
no setter
Methods
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andThen<B>(covariant Option<B> then())
→ Option<B>
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If this Option is a Some, then return the result of calling
then.
Otherwise return None.
inherited
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ap<B>(covariant Option<B Function(T t)> a)
→ Option<B>
-
Apply the function contained inside
a to change the value of type T to
a value of type B.
inherited
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call<B>(covariant Option<B> chain)
→ Option<B>
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Chain multiple Options.
inherited
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chainFirst<B>(covariant Monad<_OptionHKT, B> chain(T a))
→ HKT<_OptionHKT, T>
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inherited
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duplicate()
→ Option<Option<T>>
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Wrap this Option inside another Option.
inherited
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extend<Z>(Z f(Option<T> t))
→ Option<Z>
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Change the value of Option from type
T to type Z based on the
value of Option<T> using function f.
override
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filter(bool f(T t))
→ Option<T>
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If this Option is a Some and calling
f returns true, then return this Some.
Otherwise return None.
override
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filterMap<Z>(Option<Z> f(T t))
→ Option<Z>
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If this Option is a Some and calling
f returns Some, then return this Some.
Otherwise return None.
override
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flatMap<B>(covariant Option<B> f(T t))
→ Option<B>
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Used to chain multiple functions that return a Option.
override
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flatMapNullable<B>(B? f(T t))
→ Option<B>
-
Return a new Option that calls Option.fromNullable on the result of of the given function
f.
inherited
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flatMapThrowable<B>(B f(T t))
→ Option<B>
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Return a new Option that calls Option.tryCatch with the given function
f.
inherited
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fold<B>(B onNone(), B onSome(T t))
→ B
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Execute
onSome when value is Some, otherwise execute onNone.
inherited
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isNone()
→ bool
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Return
true when value is None.
override
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isSome()
→ bool
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Return
true when value is Some.
override
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map<B>(B f(T t))
→ Option<B>
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Change the value of type
T to a value of type B using function f.
override
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map2<C, D>(covariant Option<C> mc, D f(T t, C c))
→ Option<D>
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Change type of this Option based on its value of type
T and the
value of type C of another Option.
override
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map3<C, D, E>(covariant Option<C> mc, covariant Option<D> md, E f(T t, C c, D d))
→ Option<E>
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Change type of this Option based on its value of type
T, the
value of type C of a second Option, and the value of type D
of a third Option.
override
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match<B>(B onNone(), B onSome(T t))
→ B
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Execute
onSome when value is Some, otherwise execute onNone.
override
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noSuchMethod(Invocation invocation)
→ dynamic
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Invoked when a nonexistent method or property is accessed.
inherited
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partition(bool f(T t))
→ (Option<T>, Option<T>)
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Return a record. If this Option is a Some:
inherited
-
partitionMap<Z, Y>(Either<Z, Y> f(T t))
→ (Option<Z>, Option<Y>)
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Return a record that contains as first value a Some when
f returns Left,
otherwise the Some will be the second value of the tuple.
inherited
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pure<B>(B b)
→ Option<B>
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Return a Some containing the value
b.
inherited
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toEither<L>(L onLeft())
→ Either<L, T>
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Build an Either from Option.
override
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toIOOption()
→ IOOption<T>
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Convert this Option to a IOOption.
inherited
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toJson(Object? toJsonT(T p1))
→ Object?
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Converts to Json.
override
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toNullable()
→ T
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Return value of type
T when this Option is a Some, null otherwise.
override
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toString()
→ String
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A string representation of this object.
override
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toTaskOption()
→ TaskOption<T>
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Convert this Option to a TaskOption.
override
