KOptional

Optional implementation that allows holding null values.

Types

inline fun get(): T

Retrieves the value if it's present, or throws NoSuchElementException otherwise.

inline fun getOrNull(): T?

Retrieves the value if it's present, or returns null.

inline fun <T, R> KOptional<T>.fold(ifPresent: (T) -> R, ifEmpty: () -> R): R

Transforms the value with the ifPresent function if it's present, or the one provided by ifEmpty otherwise.

inline fun <T> KOptional<T>.getOrDefault(default: T): T

Returns the value if it's present, or default otherwise.

inline fun <T> KOptional<T>.getOrElse(action: () -> T): T

Returns the value if it's present, or the one provided by the action otherwise.

inline fun <T> KOptional<T>.ifEmpty(action: () -> Unit): KOptional<T>

Executes the provided action if the value is absent.

inline fun <T> KOptional<T>.ifPresent(action: (T) -> Unit): KOptional<T>

Executes the provided action if the value is present.

inline fun <T, R> KOptional<T>.map(action: (T) -> R): KOptional<R>

Transforms the value with the provided action if it's present.