Maybe<T> class

Constructors

Maybe.nothing()

Maybe.some(T? _value, {bool nullable = false, bool nothingWhen(T? value)?})

Properties

hashCode → int

The hash code for this object.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

flatMap<E>(dynamic f) → Maybe<E>

map(dynamic f) → Maybe<T>

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

unwrap() → T?

Operators

operator ==(Object other) → bool

The equality operator.

override

Static Methods

count<E>(Iterable<Maybe<E>>? maybeList) → int

filter<E>(Iterable<Maybe<E>>? maybeIterable) → Iterable<E>

flatten<E>(Maybe<Maybe<E>>? maybe) → Maybe<E>

forEach<E>(Iterable<Maybe<E>>? maybeIterable, void f(E element)) → void

isNothing<T>(Maybe<T> maybe) → bool

isSome<T>(Maybe<T> maybe) → bool

mapSome<T, U>(Maybe<T> maybe, U converter(T v)) → Maybe<U>

someFrom<T>(Maybe<T> maybe, T defaultValue) → T

when<T>(Maybe<T> maybe, {MaybeNothing? nothing, MaybeSome<T?>? some, MaybeDefault<T>? defaultValue}) → void