OptionMethodsExtension<T extends Object> extension

on

• Option<T>

Methods

and<U extends Object>(Option<U> other) → Option<U>

Available on Option<T>, provided by the OptionMethodsExtension extension

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

andThen<U extends Object>(Option<U> f(T)) → Option<U>

Available on Option<T>, provided by the OptionMethodsExtension extension

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

expect(String msg) → T

Available on Option<T>, provided by the OptionMethodsExtension extension

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

filter(bool predicate(T)) → Option<T>

Available on Option<T>, provided by the OptionMethodsExtension extension

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

inspect(dynamic f(T)) → Option<T>

Available on Option<T>, provided by the OptionMethodsExtension extension

Calls the provided closure with a reference to the contained value

isNone() → bool

Available on Option<T>, provided by the OptionMethodsExtension extension

Returns true if the option is a None value.

isSome() → bool

Available on Option<T>, provided by the OptionMethodsExtension extension

Returns true if the option is a Some value.

isSomeAnd(bool f(T)) → bool

Available on Option<T>, provided by the OptionMethodsExtension extension

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

iter() → Iter<T>

Available on Option<T>, provided by the OptionMethodsExtension extension

Returns an Iter over the possibly contained value.

map<U extends Object>(U f(T)) → Option<U>

Available on Option<T>, provided by the OptionMethodsExtension extension

Maps an this Option

mapOr<U>(U defaultValue, U f(T)) → U

Available on Option<T>, provided by the OptionMethodsExtension extension

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

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

Available on Option<T>, provided by the OptionMethodsExtension extension

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

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

Available on Option<T>, provided by the OptionMethodsExtension extension

Transforms the Option

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

Available on Option<T>, provided by the OptionMethodsExtension extension

Transforms the Option

or(Option<T> other) → Option<T>

Available on Option<T>, provided by the OptionMethodsExtension extension

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

orElse(Option<T> f()) → Option<T>

Available on Option<T>, provided by the OptionMethodsExtension extension

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

toNullable() → T?

Available on Option<T>, provided by the OptionMethodsExtension extension

Returns the inner type as the nullable version of T

unwrap() → T

Available on Option<T>, provided by the OptionMethodsExtension extension

Returns the contained Some value, consuming the self value.

unwrapOr(T defaultValue) → T

Available on Option<T>, provided by the OptionMethodsExtension extension

Returns the contained Some value or a provided default.

unwrapOrElse(T f()) → T

Available on Option<T>, provided by the OptionMethodsExtension extension

Returns the contained Some value or computes it from a closure.

xor(Option<T> other) → Option<T>

Available on Option<T>, provided by the OptionMethodsExtension extension

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

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

Available on Option<T>, provided by the OptionMethodsExtension extension

Zips self with another Option.

zipWith<U extends Object, R extends Object>(Option<U> other, R f(T, U)) → Option<R>

Available on Option<T>, provided by the OptionMethodsExtension extension

Zips self and another Option with function f

Operators

operator [](_OptionEarlyReturnKey op) → T

Available on Option<T>, provided by the OptionMethodsExtension extension

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