ResultSelector

Represents an interface that extracts a result from a list. Meant to be used as a collection operation on a stream.

<T>

the type of the result to extract

Functions

open fun finisher(): (List<T>) -> Optional<T>

open fun <T, R> of(supplier: Supplier<R>, accumulator: BiConsumer<R, T>, combiner: BinaryOperator<R>, characteristics: Array<Collector.Characteristics>): Collector<T, R, R>

open fun <T, A, R> of(supplier: Supplier<A>, accumulator: BiConsumer<A, T>, combiner: BinaryOperator<A>, finisher: (A) -> R, characteristics: Array<Collector.Characteristics>): Collector<T, A, R>

abstract fun select(results: List<T>): Optional<T>

Extracts a result from the list.