Some<T> class final

Implemented types

• Option<T>

Available extensions

• Option$NoneExtension
• Option$OptionNestedRecord3Extension
• Option$OptionNestedRecord4Extension
• Option$OptionNestedRecord5Extension
• Option$OptionNullableExtension
• Option$OptionOptionExtension
• Option$OptionRecord2Extension
• Option$OptionResultExtension
• Option$ToFutureOptionExtension

Constructors

Some.new(T v)

const

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

v → T

final

Methods

and<U>(Option<U> other) → Option<U>

Returns None if the option is None, otherwise returns other.

override

andThen<U>(Option<U> f(T self)) → Option<U>

Returns None if the option is None, otherwise calls f with the wrapped value and returns the result. Some languages call this operation flatmap.

override

copy() → Some<T>

Shallow copies this Option

override

expect(String msg) → T

Returns the contained Some value if Some, otherwise throws a Panic.

override

filter(bool predicate(T self)) → Option<T>

Returns None if the option is None, otherwise calls predicate with the wrapped value and returns Some(t) if predicate returns true (where t is the wrapped value), and

override

flatten() → Option<(A, B, C)>

Available on Option<((A, B), C)>, provided by the Option$OptionNestedRecord3Extension extension

Flattens an option into a single tuple.

flatten() → Option<(A, B, C, D)>

Available on Option<(((A, B), C), D)>, provided by the Option$OptionNestedRecord4Extension extension

Flattens an option into a single tuple.

flatten() → Option<T>

Available on Option<Option<T>>, provided by the Option$OptionOptionExtension extension

Converts from Option<Option

flatten() → Option<T>

Available on Option<T?>, provided by the Option$OptionNullableExtension extension

Converts from Option<T?> to Option

flatten() → Option<(A, B, C, D, E)>

Available on Option<((((A, B), C), D), E)>, provided by the Option$OptionNestedRecord5Extension extension

Flattens an option into a single tuple.

inspect(dynamic f(T self)) → Some<T>

Calls the provided closure with a reference to the contained value

override

isNone() → bool

Returns true if the option is a None value.

override

isSome() → bool

Returns true if the option is a Some value.

override

isSomeAnd(bool f(T self)) → bool

Returns true if the option is a Some and the value inside of it matches a predicate.

override

iter() → Iter<T>

Returns an Iter over the possibly contained value.

override

map<U>(U f(T self)) → Some<U>

Maps an this Option

override

mapOr<U>(U defaultValue, U f(T)) → U

Returns the provided default result (if none), or applies a function to the contained value (if any).

override

mapOrElse<U>(U defaultFn(), U f(T)) → U

Computes a default function result (if none), or applies a different function to the contained value (if any).

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

okOr<E extends Object>(E err) → Ok<T, E>

Transforms the Option

override

okOrElse<E extends Object>(E errFn()) → Ok<T, E>

Transforms the Option

override

or(Option<T> other) → Option<T>

Available on Option<T>, provided by the Option$NoneExtension extension

Returns the option if it contains a value, otherwise returns other

or(Option<T> other) → Some<T>

Returns the option if it contains a value, otherwise returns other.

orElse(Option<T> f()) → Option<T>

Available on Option<T>, provided by the Option$NoneExtension extension

Returns the option if it contains a value, otherwise calls f and returns the result.

orElse(Option<T> f()) → Some<T>

Returns this value as Some

toFutureOption() → Future<Option<T>>

Available on Option<T>, provided by the Option$ToFutureOptionExtension extension

Converts a Option

toNullable() → T

override

toString() → String

A string representation of this object.

override

transpose() → Result<Option<S>, F>

Available on Option<Result<S?, F>>, provided by the Option$OptionResultExtension extension

Transposes an Option of a Result into a Result of an Option.

unwrap() → T

Returns the contained Some value, consuming the self value.

override

unwrapOr(T defaultValue) → T

Available on Option<T>, provided by the Option$NoneExtension extension

Returns the contained Some value or a provided default.

unwrapOr(T defaultValue) → T

Returns this value

unwrapOrElse(T f()) → T

Available on Option<T>, provided by the Option$NoneExtension extension

Returns the option if it contains a value, otherwise returns other.

unwrapOrElse(T f()) → T

Returns this value

unzip() → (Option<T>, Option<U>)

Available on Option<(T, U)>, provided by the Option$OptionRecord2Extension extension

Unzips an option containing a tuple of two options. If self is Some((a, b)) this method returns (Some(a), Some(b)). Otherwise, (None, None) is returned.

xor(Option<T> other) → Option<T>

Returns Some if the other is not Some

xor(Option<T> other) → Option<T>

Available on Option<T>, provided by the Option$NoneExtension extension

Returns Some if exactly one of this or other is Some, otherwise returns None.

zip<U>(Option<U> other) → Option<(T, U)>

Zips self with another Option.

override

zipWith<U, R>(Option<U> other, R f(T p1, U p2)) → Option<R>

Zips self and another Option with function f

override

Operators

operator ==(Object other) → bool

The equality operator.

override

operator [](_OptionEarlyReturnKey op) → T

Functions an "Early Return Operator" when given an "Early Return key" "$". See Option.$ for more information.

override