Uses of Interface
one.util.streamex.DoubleCollector

Uses of DoubleCollector in one.util.streamex

Methods in one.util.streamex that return DoubleCollector

Modifier and Type	Method	Description
default <RR> DoubleCollector<A,RR>	DoubleCollector.andThen(Function<R,RR> finisher)	Adapts this collector to perform an additional finishing transformation.
static DoubleCollector<?, OptionalDouble>	DoubleCollector.averaging()	Returns a DoubleCollector that produces the arithmetic mean of the input elements or an empty optional if no elements are collected.
static DoubleCollector<?,Long>	DoubleCollector.counting()	Returns a DoubleCollector that counts the number of input elements and returns the result as Long.
static DoubleCollector<?,Integer>	DoubleCollector.countingInt()	Returns an DoubleCollector that counts the number of input elements and returns the result as Integer.
static <K> DoubleCollector<?, Map<K,double[]>>	DoubleCollector.groupingBy(DoubleFunction<? extends K> classifier)	Returns a DoubleCollector implementing a "group by" operation on input numbers, grouping them according to a classification function, and returning the results in a Map.
static <K, D, A, M extends Map<K,D>> DoubleCollector<?,M>	DoubleCollector.groupingBy(DoubleFunction<? extends K> classifier, Supplier<M> mapFactory, DoubleCollector<A,D> downstream)	Returns a DoubleCollector implementing a cascaded "group by" operation on input numbers, grouping them according to a classification function, and then performing a reduction operation on the values associated with a given key using the specified downstream IntCollector.
static <K,D,A> DoubleCollector<?,Map<K,D>>	DoubleCollector.groupingBy(DoubleFunction<? extends K> classifier, DoubleCollector<A,D> downstream)	Returns a DoubleCollector implementing a cascaded "group by" operation on input numbers, grouping them according to a classification function, and then performing a reduction operation on the values associated with a given key using the specified downstream IntCollector.
static DoubleCollector<?,String>	DoubleCollector.joining(CharSequence delimiter)	Returns a DoubleCollector that converts the input numbers to strings and concatenates them, separated by the specified delimiter, in encounter order.
static DoubleCollector<?,String>	DoubleCollector.joining(CharSequence delimiter, CharSequence prefix, CharSequence suffix)	Returns a DoubleCollector that converts the input numbers to strings and concatenates them, separated by the specified delimiter, with the specified prefix and suffix, in encounter order.
static <A,R> DoubleCollector<?,R>	DoubleCollector.mapping(DoubleUnaryOperator mapper, DoubleCollector<A,R> downstream)	Adapts a DoubleCollector to another one by applying a mapping function to each input element before accumulation.
static <U,A,R> DoubleCollector<?,R>	DoubleCollector.mappingToObj(DoubleFunction<U> mapper, Collector<U,A,R> downstream)	Adapts a Collector accepting elements of type U to a DoubleCollector by applying a mapping function to each input element before accumulation.
static DoubleCollector<?, OptionalDouble>	DoubleCollector.max()	Returns a DoubleCollector that produces the maximal element, described as an OptionalDouble.
static DoubleCollector<?, OptionalDouble>	DoubleCollector.min()	Returns a DoubleCollector that produces the minimal element, described as an OptionalDouble.
static <A,R> DoubleCollector<A,R>	DoubleCollector.of(Supplier<A> supplier, ObjDoubleConsumer<A> doubleAccumulator, BiConsumer<A,A> merger, Function<A,R> finisher)	Returns a new DoubleCollector described by the given supplier, accumulator, merger, and finisher functions.
static <R> DoubleCollector<R,R>	DoubleCollector.of(Supplier<R> supplier, ObjDoubleConsumer<R> doubleAccumulator, BiConsumer<R,R> merger)	Returns a new DoubleCollector described by the given supplier, accumulator, and merger functions.
static <A,R> DoubleCollector<?,R>	DoubleCollector.of(Collector<Double,A,R> collector)	Adapts a Collector which accepts elements of type Double to a DoubleCollector.
static DoubleCollector<?, Map<Boolean,double[]>>	DoubleCollector.partitioningBy(DoublePredicate predicate)	Returns a DoubleCollector which partitions the input elements according to a DoublePredicate, and organizes them into a Map<Boolean, double[]>.
static <A,D> DoubleCollector<?, Map<Boolean,D>>	DoubleCollector.partitioningBy(DoublePredicate predicate, DoubleCollector<A,D> downstream)	Returns a DoubleCollector which partitions the input numbers according to a DoublePredicate, reduces the values in each partition according to another IntCollector, and organizes them into a Map<Boolean, D> whose values are the result of the downstream reduction.
static DoubleCollector<?,Double>	DoubleCollector.reducing(double identity, DoubleBinaryOperator op)	Returns a DoubleCollector which performs a reduction of its input numbers under a specified IntBinaryOperator using the provided identity.
static DoubleCollector<?, OptionalDouble>	DoubleCollector.reducing(DoubleBinaryOperator op)	Returns a DoubleCollector which performs a reduction of its input numbers under a specified DoubleBinaryOperator.
static DoubleCollector<?, DoubleSummaryStatistics>	DoubleCollector.summarizing()	Returns a DoubleCollector which returns summary statistics for the input elements.
static DoubleCollector<?,Double>	DoubleCollector.summing()	Returns a DoubleCollector that produces the sum of the input elements.
static DoubleCollector<?,double[]>	DoubleCollector.toArray()	Returns a DoubleCollector that produces the array of the input elements.
static DoubleCollector<?, boolean[]>	DoubleCollector.toBooleanArray(DoublePredicate predicate)	Returns a DoubleCollector which produces a boolean array containing the results of applying the given predicate to the input elements, in encounter order.
static DoubleCollector<?,float[]>	DoubleCollector.toFloatArray()	Returns a DoubleCollector that produces the float[] array of the input elements converting them via (float) casting.

Methods in one.util.streamex with parameters of type DoubleCollector

Modifier and Type	Method	Description
<A,R> R	DoubleStreamEx.collect(DoubleCollector<A,R> collector)	Performs a mutable reduction operation on the elements of this stream using an DoubleCollector which encapsulates the supplier, accumulator and merger functions making easier to reuse collection strategies.
static <K, D, A, M extends Map<K,D>> DoubleCollector<?,M>	DoubleCollector.groupingBy(DoubleFunction<? extends K> classifier, Supplier<M> mapFactory, DoubleCollector<A,D> downstream)	Returns a DoubleCollector implementing a cascaded "group by" operation on input numbers, grouping them according to a classification function, and then performing a reduction operation on the values associated with a given key using the specified downstream IntCollector.
static <K,D,A> DoubleCollector<?,Map<K,D>>	DoubleCollector.groupingBy(DoubleFunction<? extends K> classifier, DoubleCollector<A,D> downstream)	Returns a DoubleCollector implementing a cascaded "group by" operation on input numbers, grouping them according to a classification function, and then performing a reduction operation on the values associated with a given key using the specified downstream IntCollector.
static <A,R> DoubleCollector<?,R>	DoubleCollector.mapping(DoubleUnaryOperator mapper, DoubleCollector<A,R> downstream)	Adapts a DoubleCollector to another one by applying a mapping function to each input element before accumulation.
static <A,D> DoubleCollector<?, Map<Boolean,D>>	DoubleCollector.partitioningBy(DoublePredicate predicate, DoubleCollector<A,D> downstream)	Returns a DoubleCollector which partitions the input numbers according to a DoublePredicate, reduces the values in each partition according to another IntCollector, and organizes them into a Map<Boolean, D> whose values are the result of the downstream reduction.