DoubleStreamEx (StreamEx 0.6.5 API)

Object
- DoubleStreamEx

All Implemented Interfaces:

AutoCloseable, BaseStream<Double,DoubleStream>, DoubleStream
```
public class DoubleStreamEx
extends Object
implements DoubleStream
```
A DoubleStream implementation with additional functionality

Author:

Tagir Valeev

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static interface`	`DoubleStreamEx.DoubleEmitter` A helper interface to build a new stream by emitting elements and creating new emitters in a chain.

Nested classes/interfaces inherited from interface DoubleStream
DoubleStream.Builder

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`allMatch(DoublePredicate predicate)` Returns whether all elements of this stream match the provided predicate.
`boolean`	`anyMatch(DoublePredicate predicate)` Returns whether any elements of this stream match the provided predicate.
`DoubleStreamEx`	`append(double... values)` Returns a new `DoubleStreamEx` which is a concatenation of this stream and the stream containing supplied values This is a quasi-intermediate operation.
`DoubleStreamEx`	`append(DoubleStream other)` Creates a lazily concatenated stream whose elements are all the elements of this stream followed by all the elements of the other stream.
`DoubleStreamEx`	`atLeast(double value)` Returns a stream consisting of the elements of this stream that greater than or equal to the specified value.
`DoubleStreamEx`	`atMost(double value)` Returns a stream consisting of the elements of this stream that less than or equal to the specified value.
`OptionalDouble`	`average()` Returns an `OptionalDouble` describing the arithmetic mean of elements of this stream, or an empty optional if this stream is empty.
`StreamEx<Double>`	`boxed()` Returns a `Stream` consisting of the elements of this stream, boxed to `Double`.
`<U> U`	`chain(Function<? super DoubleStreamEx,U> mapper)` Applies the supplied function to this stream and returns the result of the function.
`void`	`close()` Closes this stream, causing all close handlers for this stream pipeline to be called.
`<A,R> R`	`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.
`<R> R`	`collect(Supplier<R> supplier, ObjDoubleConsumer<R> accumulator, BiConsumer<R,R> combiner)` Performs a mutable reduction operation on the elements of this stream.
`static DoubleStreamEx`	`constant(double value, long length)` Returns a sequential unordered `DoubleStreamEx` of given length which elements are equal to supplied value.
`long`	`count()` Returns the count of elements in this stream.
`DoubleStreamEx`	`distinct()` Returns a stream consisting of the distinct elements of this stream.
`DoubleStreamEx`	`dropWhile(DoublePredicate predicate)` Returns a stream consisting of all elements from this stream starting from the first element which does not match the given predicate.
`static DoubleStreamEx`	`empty()` Returns an empty sequential `DoubleStreamEx`.
`DoubleStreamEx`	`filter(DoublePredicate predicate)` Returns a stream consisting of the elements of this stream that match the given predicate.
`OptionalDouble`	`findAny()` Returns an `OptionalDouble` describing some element of the stream, or an empty `OptionalDouble` if the stream is empty.
`OptionalDouble`	`findAny(DoublePredicate predicate)` Returns an `OptionalDouble` describing some element of the stream, which matches given predicate, or an empty `OptionalDouble` if there's no matching element.
`OptionalDouble`	`findFirst()` Returns an `OptionalDouble` describing the first element of this stream, or an empty `OptionalDouble` if the stream is empty.
`OptionalDouble`	`findFirst(DoublePredicate predicate)` Returns an `OptionalDouble` describing the first element of this stream, which matches given predicate, or an empty `OptionalDouble` if there's no matching element.
`DoubleStreamEx`	`flatMap(DoubleFunction<? extends DoubleStream> mapper)` Returns a stream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element.
`IntStreamEx`	`flatMapToInt(DoubleFunction<? extends IntStream> mapper)` Returns an `IntStreamEx` consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element.
`LongStreamEx`	`flatMapToLong(DoubleFunction<? extends LongStream> mapper)` Returns a `LongStreamEx` consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element.
`<R> StreamEx<R>`	`flatMapToObj(DoubleFunction<? extends Stream<R>> mapper)` Returns a `StreamEx` consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element.
`OptionalDouble`	`foldLeft(DoubleBinaryOperator accumulator)` Folds the elements of this stream using the provided accumulation function, going left to right.
`double`	`foldLeft(double seed, DoubleBinaryOperator accumulator)` Folds the elements of this stream using the provided seed object and accumulation function, going left to right.
`void`	`forEach(DoubleConsumer action)` Performs an action for each element of this stream.
`void`	`forEachOrdered(DoubleConsumer action)` Performs an action for each element of this stream, guaranteeing that each element is processed in encounter order for streams that have a defined encounter order.
`static DoubleStreamEx`	`generate(DoubleSupplier s)` Returns an infinite sequential unordered stream where each element is generated by the provided `DoubleSupplier`.
`DoubleStreamEx`	`greater(double value)` Returns a stream consisting of the elements of this stream that strictly greater than the specified value.
`OptionalLong`	`indexOf(DoublePredicate predicate)` Returns an `OptionalLong` describing the zero-based index of the first element of this stream, which matches given predicate, or an empty `OptionalLong` if there's no matching element.
`boolean`	`isParallel()` Returns whether this stream, if a terminal operation were to be executed, would execute in parallel.
`static DoubleStreamEx`	`iterate(double seed, DoublePredicate predicate, DoubleUnaryOperator f)` Returns a sequential ordered `DoubleStreamEx` produced by iterative application of a function to an initial element, conditioned on satisfying the supplied predicate.
`static DoubleStreamEx`	`iterate(double seed, DoubleUnaryOperator f)` Returns an infinite sequential ordered `DoubleStreamEx` produced by iterative application of a function `f` to an initial element `seed`, producing a stream consisting of `seed`, `f(seed)`, `f(f(seed))`, etc.
`PrimitiveIterator.OfDouble`	`iterator()` Returns an iterator for the elements of this stream.
`String`	`joining(CharSequence delimiter)` Returns a `String` which is the concatenation of the results of calling `String.valueOf(double)` on each element of this stream, separated by the specified delimiter, in encounter order.
`String`	`joining(CharSequence delimiter, CharSequence prefix, CharSequence suffix)` Returns a `String` which is the concatenation of the results of calling `String.valueOf(double)` on each element of this stream, separated by the specified delimiter, with the specified prefix and suffix in encounter order.
`DoubleStreamEx`	`less(double value)` Returns a stream consisting of the elements of this stream that strictly less than the specified value.
`DoubleStreamEx`	`limit(long maxSize)` Returns a stream consisting of the elements of this stream, truncated to be no longer than `maxSize` in length.
`DoubleStreamEx`	`map(DoubleUnaryOperator mapper)` Returns a stream consisting of the results of applying the given function to the elements of this stream.
`DoubleStreamEx`	`mapFirst(DoubleUnaryOperator mapper)` Returns a stream where the first element is the replaced with the result of applying the given function while the other elements are left intact.
`DoubleStreamEx`	`mapLast(DoubleUnaryOperator mapper)` Returns a stream where the last element is the replaced with the result of applying the given function while the other elements are left intact.
`<K,V> EntryStream<K,V>`	`mapToEntry(DoubleFunction<? extends K> keyMapper, DoubleFunction<? extends V> valueMapper)` Returns an `EntryStream` consisting of the `Map.Entry` objects which keys and values are results of applying the given functions to the elements of this stream.
`IntStreamEx`	`mapToInt(DoubleToIntFunction mapper)` Returns an `IntStream` consisting of the results of applying the given function to the elements of this stream.
`LongStreamEx`	`mapToLong(DoubleToLongFunction mapper)` Returns a `LongStream` consisting of the results of applying the given function to the elements of this stream.
`<U> StreamEx<U>`	`mapToObj(DoubleFunction<? extends U> mapper)` Returns an object-valued `Stream` consisting of the results of applying the given function to the elements of this stream.
`OptionalDouble`	`max()` Returns an `OptionalDouble` describing the maximum element of this stream, or an empty OptionalDouble if this stream is empty.
`OptionalDouble`	`max(Comparator<Double> comparator)` Returns the maximum element of this stream according to the provided `Comparator`.
`<V extends Comparable<? super V>> OptionalDouble`	`maxBy(DoubleFunction<V> keyExtractor)` Returns the maximum element of this stream according to the provided key extractor function.
`OptionalDouble`	`maxByDouble(DoubleUnaryOperator keyExtractor)` Returns the maximum element of this stream according to the provided key extractor function.
`OptionalDouble`	`maxByInt(DoubleToIntFunction keyExtractor)` Returns the maximum element of this stream according to the provided key extractor function.
`OptionalDouble`	`maxByLong(DoubleToLongFunction keyExtractor)` Returns the maximum element of this stream according to the provided key extractor function.
`OptionalDouble`	`min()` Returns an `OptionalDouble` describing the minimum element of this stream, or an empty OptionalDouble if this stream is empty.
`OptionalDouble`	`min(Comparator<Double> comparator)` Returns the minimum element of this stream according to the provided `Comparator`.
`<V extends Comparable<? super V>> OptionalDouble`	`minBy(DoubleFunction<V> keyExtractor)` Returns the minimum element of this stream according to the provided key extractor function.
`OptionalDouble`	`minByDouble(DoubleUnaryOperator keyExtractor)` Returns the minimum element of this stream according to the provided key extractor function.
`OptionalDouble`	`minByInt(DoubleToIntFunction keyExtractor)` Returns the minimum element of this stream according to the provided key extractor function.
`OptionalDouble`	`minByLong(DoubleToLongFunction keyExtractor)` Returns the minimum element of this stream according to the provided key extractor function.
`boolean`	`noneMatch(DoublePredicate predicate)` Returns whether no elements of this stream match the provided predicate.
`static DoubleStreamEx`	`of(Collection<Double> collection)` Returns a sequential ordered `DoubleStreamEx` whose elements are the unboxed elements of supplied collection.
`static DoubleStreamEx`	`of(double... elements)` Returns a sequential ordered `DoubleStreamEx` whose elements are the specified values.
`static DoubleStreamEx`	`of(double element)` Returns a sequential `DoubleStreamEx` containing a single element.
`static DoubleStreamEx`	`of(Double[] array)` Returns a sequential ordered `DoubleStreamEx` whose elements are the unboxed elements of supplied array.
`static DoubleStreamEx`	`of(double[] array, int startInclusive, int endExclusive)` Returns a sequential `DoubleStreamEx` with the specified range of the specified array as its source.
`static DoubleStreamEx`	`of(DoubleBuffer buf)` Returns a sequential ordered `DoubleStreamEx` whose elements are the values in the supplied `DoubleBuffer`.
`static DoubleStreamEx`	`of(DoubleStream stream)` Returns a `DoubleStreamEx` object which wraps given `DoubleStream`.
`static DoubleStreamEx`	`of(float... elements)` Returns a sequential ordered `DoubleStreamEx` whose elements are the specified float values casted to double.
`static DoubleStreamEx`	`of(float[] array, int startInclusive, int endExclusive)` Returns a sequential `DoubleStreamEx` with the specified range of the specified array as its source.
`static DoubleStreamEx`	`of(OptionalDouble optional)` Returns a sequential `DoubleStreamEx` containing an `OptionalDouble` value, if present, otherwise returns an empty `DoubleStreamEx`.
`static DoubleStreamEx`	`of(PrimitiveIterator.OfDouble iterator)` Returns a sequential, ordered `DoubleStreamEx` created from given `PrimitiveIterator.OfDouble`.
`static DoubleStreamEx`	`of(Random random)` Returns an effectively unlimited stream of pseudorandom `double` values, each between zero (inclusive) and one (exclusive) produced by given `Random` object.
`static DoubleStreamEx`	`of(Random random, double randomNumberOrigin, double randomNumberBound)` Returns an effectively unlimited stream of pseudorandom `double` values, each conforming to the given origin (inclusive) and bound (exclusive) produced by given `Random` object.
`static DoubleStreamEx`	`of(Random random, long streamSize)` Returns a stream producing the given `streamSize` number of pseudorandom `double` values, each between zero (inclusive) and one (exclusive) produced by given `Random` object.
`static DoubleStreamEx`	`of(Random random, long streamSize, double randomNumberOrigin, double randomNumberBound)` Returns a stream producing the given `streamSize` number of pseudorandom `double` values, each conforming to the given origin (inclusive) and bound (exclusive) produced by given `Random` object.
`static DoubleStreamEx`	`of(Spliterator.OfDouble spliterator)` Returns a sequential `DoubleStreamEx` created from given `Spliterator.OfDouble`.
`DoubleStreamEx`	`onClose(Runnable closeHandler)` Returns an equivalent stream with an additional close handler.
`DoubleStreamEx`	`pairMap(DoubleBinaryOperator mapper)` Returns a stream consisting of the results of applying the given function to the every adjacent pair of elements of this stream.
`DoubleStreamEx`	`parallel()` Returns an equivalent stream that is parallel.
`DoubleStreamEx`	`parallel(ForkJoinPool fjp)` Returns an equivalent stream that is parallel and bound to the supplied `ForkJoinPool`.
`DoubleStreamEx`	`peek(DoubleConsumer action)` Returns a stream consisting of the elements of this stream, additionally performing the provided action on each element as elements are consumed from the resulting stream.
`DoubleStreamEx`	`peekFirst(DoubleConsumer action)` Returns a stream consisting of the elements of this stream, additionally performing the provided action on the first stream element when it's consumed from the resulting stream.
`DoubleStreamEx`	`peekLast(DoubleConsumer action)` Returns a stream consisting of the elements of this stream, additionally performing the provided action on the last stream element when it's consumed from the resulting stream.
`DoubleStreamEx`	`prefix(DoubleBinaryOperator op)` Returns a stream containing cumulative results of applying the accumulation function going left to right.
`DoubleStreamEx`	`prepend(double... values)` Returns a new `DoubleStreamEx` which is a concatenation of the stream containing supplied values and this stream This is a quasi-intermediate operation.
`DoubleStreamEx`	`prepend(DoubleStream other)` Creates a lazily concatenated stream whose elements are all the elements of the other stream followed by all the elements of this stream.
`static DoubleStreamEx`	`produce(Predicate<DoubleConsumer> producer)` Return an ordered stream produced by consecutive calls of the supplied producer until it returns false.
`OptionalDouble`	`reduce(DoubleBinaryOperator op)` Performs a reduction on the elements of this stream, using an associative accumulation function, and returns an `OptionalDouble` describing the reduced value, if any.
`double`	`reduce(double identity, DoubleBinaryOperator op)` Performs a reduction on the elements of this stream, using the provided identity value and an associative accumulation function, and returns the reduced value.
`DoubleStreamEx`	`remove(DoublePredicate predicate)` Returns a stream consisting of the elements of this stream that don't match the given predicate.
`DoubleStreamEx`	`reverseSorted()` Returns a stream consisting of the elements of this stream in reverse sorted order.
`double[]`	`scanLeft(DoubleBinaryOperator accumulator)` Produces an array containing cumulative results of applying the accumulation function going left to right.
`double[]`	`scanLeft(double seed, DoubleBinaryOperator accumulator)` Produces an array containing cumulative results of applying the accumulation function going left to right using given seed value.
`DoubleStreamEx`	`sequential()` Returns an equivalent stream that is sequential.
`DoubleStreamEx`	`skip(long n)` Returns a stream consisting of the remaining elements of this stream after discarding the first `n` elements of the stream.
`DoubleStreamEx`	`skipOrdered(long n)` Returns a stream consisting of the remaining elements of this stream after discarding the first `n` elements of the stream.
`DoubleStreamEx`	`sorted()` Returns a stream consisting of the elements of this stream in sorted order.
`DoubleStreamEx`	`sorted(Comparator<Double> comparator)` Returns a stream consisting of the elements of this stream sorted according to the given comparator.
`<V extends Comparable<? super V>> DoubleStreamEx`	`sortedBy(DoubleFunction<V> keyExtractor)` Returns a stream consisting of the elements of this stream, sorted according to the natural order of the keys extracted by provided function.
`DoubleStreamEx`	`sortedByDouble(DoubleUnaryOperator keyExtractor)` Returns a stream consisting of the elements of this stream, sorted according to the double values extracted by provided function.
`DoubleStreamEx`	`sortedByInt(DoubleToIntFunction keyExtractor)` Returns a stream consisting of the elements of this stream, sorted according to the int values extracted by provided function.
`DoubleStreamEx`	`sortedByLong(DoubleToLongFunction keyExtractor)` Returns a stream consisting of the elements of this stream, sorted according to the long values extracted by provided function.
`SPLTR`	`spliterator()` Returns a spliterator for the elements of this stream.
`double`	`sum()` Returns the sum of elements in this stream.
`DoubleSummaryStatistics`	`summaryStatistics()` Returns a `DoubleSummaryStatistics` describing various summary data about the elements of this stream.
`DoubleStreamEx`	`takeWhile(DoublePredicate predicate)` Returns a stream consisting of all elements from this stream until the first element which does not match the given predicate is found.
`DoubleStreamEx`	`takeWhileInclusive(DoublePredicate predicate)` Returns a stream consisting of all elements from this stream until the first element which does not match the given predicate is found (including the first mismatching element).
`double[]`	`toArray()` Returns an array containing the elements of this stream.
`float[]`	`toFloatArray()` Returns a `float[]` array containing the elements of this stream which are converted to floats using `(float)` cast operation.
`DoubleStreamEx`	`unordered()` Returns an equivalent stream that is unordered.
`static DoubleStreamEx`	`zip(double[] first, double[] second, DoubleBinaryOperator mapper)` Returns a sequential `DoubleStreamEx` containing the results of applying the given function to the corresponding pairs of values in given two arrays.

Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface DoubleStream
builder, concat, spliterator

Methods inherited from interface BaseStream
close, isParallel

- Method Detail
  - unordered
```
public DoubleStreamEx unordered()
```
    Description copied from interface: java.util.stream.BaseStream
    
    Returns an equivalent stream that is unordered. May return itself, either because the stream was already unordered, or because the underlying stream state was modified to be unordered.
    This is an intermediate operation.
    
    Specified by:
    
    unordered in interface BaseStream<Double,DoubleStream>
    
    Returns:
    
    an unordered stream
  - onClose
```
public DoubleStreamEx onClose(Runnable closeHandler)
```
    Description copied from interface: java.util.stream.BaseStream
    
    Returns an equivalent stream with an additional close handler. Close handlers are run when the BaseStream.close() method is called on the stream, and are executed in the order they were added. All close handlers are run, even if earlier close handlers throw exceptions. If any close handler throws an exception, the first exception thrown will be relayed to the caller of close(), with any remaining exceptions added to that exception as suppressed exceptions (unless one of the remaining exceptions is the same exception as the first exception, since an exception cannot suppress itself.) May return itself.
    This is an intermediate operation.
    
    Specified by:
    
    onClose in interface BaseStream<Double,DoubleStream>
    
    Parameters:
    
    closeHandler - A task to execute when the stream is closed
    
    Returns:
    
    a stream with a handler that is run if the stream is closed
  - filter
```
public DoubleStreamEx filter(DoublePredicate predicate)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns a stream consisting of the elements of this stream that match the given predicate.
    This is an intermediate operation.
    
    Specified by:
    
    filter in interface DoubleStream
    
    Parameters:
    
    predicate - a non-interfering, stateless predicate to apply to each element to determine if it should be included
    
    Returns:
    
    the new stream
  - remove
```
public DoubleStreamEx remove(DoublePredicate predicate)
```
    Returns a stream consisting of the elements of this stream that don't match the given predicate.
    This is an intermediate operation.
    
    Parameters:
    
    predicate - a non-interfering, stateless predicate to apply to each element to determine if it should be excluded
    
    Returns:
    
    the new stream
  - greater
```
public DoubleStreamEx greater(double value)
```
    Returns a stream consisting of the elements of this stream that strictly greater than the specified value.
    This is an intermediate operation.
    
    Parameters:
    
    value - a value to compare to
    
    Returns:
    
    the new stream
    
    Since:
    
    0.2.3
  - less
```
public DoubleStreamEx less(double value)
```
    Returns a stream consisting of the elements of this stream that strictly less than the specified value.
    This is an intermediate operation.
    
    Parameters:
    
    value - a value to compare to
    
    Returns:
    
    the new stream
    
    Since:
    
    0.2.3
  - atLeast
```
public DoubleStreamEx atLeast(double value)
```
    Returns a stream consisting of the elements of this stream that greater than or equal to the specified value.
    This is an intermediate operation.
    
    Parameters:
    
    value - a value to compare to
    
    Returns:
    
    the new stream
    
    Since:
    
    0.2.3
  - atMost
```
public DoubleStreamEx atMost(double value)
```
    Returns a stream consisting of the elements of this stream that less than or equal to the specified value.
    This is an intermediate operation.
    
    Parameters:
    
    value - a value to compare to
    
    Returns:
    
    the new stream
    
    Since:
    
    0.2.3
  - map
```
public DoubleStreamEx map(DoubleUnaryOperator mapper)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns a stream consisting of the results of applying the given function to the elements of this stream.
    This is an intermediate operation.
    
    Specified by:
    
    map in interface DoubleStream
    
    Parameters:
    
    mapper - a non-interfering, stateless function to apply to each element
    
    Returns:
    
    the new stream
  - mapFirst
```
public DoubleStreamEx mapFirst(DoubleUnaryOperator mapper)
```
    Returns a stream where the first element is the replaced with the result of applying the given function while the other elements are left intact.
    This is a quasi-intermediate operation.
    
    Parameters:
    
    mapper - a non-interfering , stateless function to apply to the first element
    
    Returns:
    
    the new stream
    
    Since:
    
    0.4.1
  - mapLast
```
public DoubleStreamEx mapLast(DoubleUnaryOperator mapper)
```
    Returns a stream where the last element is the replaced with the result of applying the given function while the other elements are left intact.
    This is a quasi-intermediate operation.
    The mapper function is called at most once. It could be not called at all if the stream is empty or there is short-circuiting operation downstream.
    
    Parameters:
    
    mapper - a non-interfering , stateless function to apply to the last element
    
    Returns:
    
    the new stream
    
    Since:
    
    0.4.1
  - mapToObj
```
public <U> StreamEx<U> mapToObj(DoubleFunction<? extends U> mapper)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns an object-valued Stream consisting of the results of applying the given function to the elements of this stream.
    This is an intermediate operation.
    
    Specified by:
    
    mapToObj in interface DoubleStream
    
    Type Parameters:
    
    U - the element type of the new stream
    
    Parameters:
    
    mapper - a non-interfering, stateless function to apply to each element
    
    Returns:
    
    the new stream
  - mapToInt
```
public IntStreamEx mapToInt(DoubleToIntFunction mapper)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns an IntStream consisting of the results of applying the given function to the elements of this stream.
    This is an intermediate operation.
    
    Specified by:
    
    mapToInt in interface DoubleStream
    
    Parameters:
    
    mapper - a non-interfering, stateless function to apply to each element
    
    Returns:
    
    the new stream
  - mapToLong
```
public LongStreamEx mapToLong(DoubleToLongFunction mapper)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns a LongStream consisting of the results of applying the given function to the elements of this stream.
    This is an intermediate operation.
    
    Specified by:
    
    mapToLong in interface DoubleStream
    
    Parameters:
    
    mapper - a non-interfering, stateless function to apply to each element
    
    Returns:
    
    the new stream
  - mapToEntry
```
public <K,V> EntryStream<K,V> mapToEntry(DoubleFunction<? extends K> keyMapper,
                                         DoubleFunction<? extends V> valueMapper)
```
    Returns an EntryStream consisting of the Map.Entry objects which keys and values are results of applying the given functions to the elements of this stream.
    This is an intermediate operation.
    
    Type Parameters:
    
    K - The Entry key type
    
    V - The Entry value type
    
    Parameters:
    
    keyMapper - a non-interfering, stateless function to apply to each element
    
    valueMapper - a non-interfering, stateless function to apply to each element
    
    Returns:
    
    the new stream
    
    Since:
    
    0.3.1
  - flatMap
```
public DoubleStreamEx flatMap(DoubleFunction<? extends DoubleStream> mapper)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns a stream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. Each mapped stream is closed after its contents have been placed into this stream. (If a mapped stream is null an empty stream is used, instead.)
    This is an intermediate operation.
    
    Specified by:
    
    flatMap in interface DoubleStream
    
    Parameters:
    
    mapper - a non-interfering, stateless function to apply to each element which produces a DoubleStream of new values
    
    Returns:
    
    the new stream
    
    See Also:
    
    Stream.flatMap(Function)
  - flatMapToInt
```
public IntStreamEx flatMapToInt(DoubleFunction<? extends IntStream> mapper)
```
    Returns an IntStreamEx consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. Each mapped stream is closed after its contents have been placed into this stream. (If a mapped stream is null an empty stream is used, instead.)
    This is an intermediate operation.
    
    Parameters:
    
    mapper - a non-interfering, stateless function to apply to each element which produces an IntStream of new values
    
    Returns:
    
    the new stream
    
    Since:
    
    0.3.0
  - flatMapToLong
```
public LongStreamEx flatMapToLong(DoubleFunction<? extends LongStream> mapper)
```
    Returns a LongStreamEx consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. Each mapped stream is closed after its contents have been placed into this stream. (If a mapped stream is null an empty stream is used, instead.)
    This is an intermediate operation.
    
    Parameters:
    
    mapper - a non-interfering, stateless function to apply to each element which produces a LongStream of new values
    
    Returns:
    
    the new stream
    
    Since:
    
    0.3.0
  - flatMapToObj
```
public <R> StreamEx<R> flatMapToObj(DoubleFunction<? extends Stream<R>> mapper)
```
    Returns a StreamEx consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. Each mapped stream is closed after its contents have been placed into this stream. (If a mapped stream is null an empty stream is used, instead.)
    This is an intermediate operation.
    
    Type Parameters:
    
    R - The element type of the new stream
    
    Parameters:
    
    mapper - a non-interfering, stateless function to apply to each element which produces a Stream of new values
    
    Returns:
    
    the new stream
    
    Since:
    
    0.3.0
  - distinct
```
public DoubleStreamEx distinct()
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns a stream consisting of the distinct elements of this stream. The elements are compared for equality according to Double.compare(double, double).
    This is a stateful intermediate operation.
    
    Specified by:
    
    distinct in interface DoubleStream
    
    Returns:
    
    the result stream
  - sorted
```
public DoubleStreamEx sorted()
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns a stream consisting of the elements of this stream in sorted order. The elements are compared for equality according to Double.compare(double, double).
    This is a stateful intermediate operation.
    
    Specified by:
    
    sorted in interface DoubleStream
    
    Returns:
    
    the result stream
  - sorted
```
public DoubleStreamEx sorted(Comparator<Double> comparator)
```
    Returns a stream consisting of the elements of this stream sorted according to the given comparator. Stream elements are boxed before passing to the comparator.
    For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
    This is a stateful intermediate operation.
    
    Parameters:
    
    comparator - a non-interfering , stateless Comparator to be used to compare stream elements
    
    Returns:
    
    the new stream
  - reverseSorted
```
public DoubleStreamEx reverseSorted()
```
    Returns a stream consisting of the elements of this stream in reverse sorted order. The elements are compared for equality according to Double.compare(double, double).
    This is a stateful intermediate operation.
    
    Returns:
    
    the new stream
    
    Since:
    
    0.0.8
  - sortedBy
```
public <V extends Comparable<? super V>> DoubleStreamEx sortedBy(DoubleFunction<V> keyExtractor)
```
    Returns a stream consisting of the elements of this stream, sorted according to the natural order of the keys extracted by provided function.
    For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
    This is a stateful intermediate operation.
    
    Type Parameters:
    
    V - the type of the Comparable sort key
    
    Parameters:
    
    keyExtractor - a non-interfering , stateless function to be used to extract sorting keys
    
    Returns:
    
    the new stream
  - sortedByInt
```
public DoubleStreamEx sortedByInt(DoubleToIntFunction keyExtractor)
```
    Returns a stream consisting of the elements of this stream, sorted according to the int values extracted by provided function.
    For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
    This is a stateful intermediate operation.
    
    Parameters:
    
    keyExtractor - a non-interfering , stateless function to be used to extract sorting keys
    
    Returns:
    
    the new stream
  - sortedByLong
```
public DoubleStreamEx sortedByLong(DoubleToLongFunction keyExtractor)
```
    Returns a stream consisting of the elements of this stream, sorted according to the long values extracted by provided function.
    For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
    This is a stateful intermediate operation.
    
    Parameters:
    
    keyExtractor - a non-interfering , stateless function to be used to extract sorting keys
    
    Returns:
    
    the new stream
  - sortedByDouble
```
public DoubleStreamEx sortedByDouble(DoubleUnaryOperator keyExtractor)
```
    Returns a stream consisting of the elements of this stream, sorted according to the double values extracted by provided function.
    For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
    This is a stateful intermediate operation.
    
    Parameters:
    
    keyExtractor - a non-interfering , stateless function to be used to extract sorting keys
    
    Returns:
    
    the new stream
  - peek
```
public DoubleStreamEx peek(DoubleConsumer action)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns a stream consisting of the elements of this stream, additionally performing the provided action on each element as elements are consumed from the resulting stream.
    This is an intermediate operation.
    For parallel stream pipelines, the action may be called at whatever time and in whatever thread the element is made available by the upstream operation. If the action modifies shared state, it is responsible for providing the required synchronization.
    
    Specified by:
    
    peek in interface DoubleStream
    
    Parameters:
    
    action - a non-interfering action to perform on the elements as they are consumed from the stream
    
    Returns:
    
    the new stream
  - peekFirst
```
public DoubleStreamEx peekFirst(DoubleConsumer action)
```
    Returns a stream consisting of the elements of this stream, additionally performing the provided action on the first stream element when it's consumed from the resulting stream.
    This is an intermediate operation.
    The action is called at most once. For parallel stream pipelines, it's not guaranteed in which thread it will be executed, so if it modifies shared state, it is responsible for providing the required synchronization.
    Note that the action might not be called at all if the first element is not consumed from the input (for example, if there's short-circuiting operation downstream which stopped the stream before the first element).
    This method exists mainly to support debugging.
    
    Parameters:
    
    action - a non-interfering action to perform on the first stream element as it is consumed from the stream
    
    Returns:
    
    the new stream
    
    Since:
    
    0.6.0
  - peekLast
```
public DoubleStreamEx peekLast(DoubleConsumer action)
```
    Returns a stream consisting of the elements of this stream, additionally performing the provided action on the last stream element when it's consumed from the resulting stream.
    This is an intermediate operation.
    The action is called at most once. For parallel stream pipelines, it's not guaranteed in which thread it will be executed, so if it modifies shared state, it is responsible for providing the required synchronization.
    Note that the action might not be called at all if the last element is not consumed from the input (for example, if there's short-circuiting operation downstream).
    This method exists mainly to support debugging.
    
    Parameters:
    
    action - a non-interfering action to perform on the first stream element as it is consumed from the stream
    
    Returns:
    
    the new stream
    
    Since:
    
    0.6.0
  - limit
```
public DoubleStreamEx limit(long maxSize)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns a stream consisting of the elements of this stream, truncated to be no longer than maxSize in length.
    This is a short-circuiting stateful intermediate operation.
    
    Specified by:
    
    limit in interface DoubleStream
    
    Parameters:
    
    maxSize - the number of elements the stream should be limited to
    
    Returns:
    
    the new stream
  - skip
```
public DoubleStreamEx skip(long n)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns a stream consisting of the remaining elements of this stream after discarding the first n elements of the stream. If this stream contains fewer than n elements then an empty stream will be returned.
    This is a stateful intermediate operation.
    
    Specified by:
    
    skip in interface DoubleStream
    
    Parameters:
    
    n - the number of leading elements to skip
    
    Returns:
    
    the new stream
  - skipOrdered
```
public DoubleStreamEx skipOrdered(long n)
```
    Returns a stream consisting of the remaining elements of this stream after discarding the first n elements of the stream. If this stream contains fewer than n elements then an empty stream will be returned.
    This is a stateful quasi-intermediate operation. Unlike skip(long) it skips the first elements even if the stream is unordered. The main purpose of this method is to workaround the problem of skipping the first elements from non-sized source with further parallel processing and unordered terminal operation (such as forEach(DoubleConsumer)). This problem was fixed in OracleJDK 8u60.
    Also it behaves much better with infinite streams processed in parallel. For example, DoubleStreamEx.iterate(0.0, i->i+1).skip(1).limit(100).parallel().toArray() will likely to fail with OutOfMemoryError, but will work nicely if skip is replaced with skipOrdered.
    For sequential streams this method behaves exactly like skip(long).
    
    Parameters:
    
    n - the number of leading elements to skip
    
    Returns:
    
    the new stream
    
    Throws:
    
    IllegalArgumentException - if n is negative
    
    Since:
    
    0.3.2
    
    See Also:
    
    skip(long)
  - forEach
```
public void forEach(DoubleConsumer action)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Performs an action for each element of this stream.
    This is a terminal operation.
    For parallel stream pipelines, this operation does not guarantee to respect the encounter order of the stream, as doing so would sacrifice the benefit of parallelism. For any given element, the action may be performed at whatever time and in whatever thread the library chooses. If the action accesses shared state, it is responsible for providing the required synchronization.
    
    Specified by:
    
    forEach in interface DoubleStream
    
    Parameters:
    
    action - a non-interfering action to perform on the elements
  - forEachOrdered
```
public void forEachOrdered(DoubleConsumer action)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Performs an action for each element of this stream, guaranteeing that each element is processed in encounter order for streams that have a defined encounter order.
    This is a terminal operation.
    
    Specified by:
    
    forEachOrdered in interface DoubleStream
    
    Parameters:
    
    action - a non-interfering action to perform on the elements
    
    See Also:
    
    DoubleStream.forEach(DoubleConsumer)
  - toArray
```
public double[] toArray()
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns an array containing the elements of this stream.
    This is a terminal operation.
    
    Specified by:
    
    toArray in interface DoubleStream
    
    Returns:
    
    an array containing the elements of this stream
  - toFloatArray
```
public float[] toFloatArray()
```
    Returns a float[] array containing the elements of this stream which are converted to floats using (float) cast operation.
    This is a terminal operation.
    
    Returns:
    
    an array containing the elements of this stream
    
    Since:
    
    0.3.0
  - reduce
```
public double reduce(double identity,
                     DoubleBinaryOperator op)
```
    Description copied from interface: java.util.stream.DoubleStream
    Performs a reduction on the elements of this stream, using the provided identity value and an associative accumulation function, and returns the reduced value. This is equivalent to:
```
     double result = identity;
     for (double element : this stream)
         result = accumulator.applyAsDouble(result, element)
     return result;
 
```
    but is not constrained to execute sequentially.
    The identity value must be an identity for the accumulator function. This means that for all x, accumulator.apply(identity, x) is equal to x. The accumulator function must be an associative function.
    This is a terminal operation.
    Specified by:
    
    reduce in interface DoubleStream
    
    Parameters:
    
    identity - the identity value for the accumulating function
    
    op - an associative, non-interfering, stateless function for combining two values
    
    Returns:
    
    the result of the reduction
    
    See Also:
    
    DoubleStream.sum(), DoubleStream.min(), DoubleStream.max(), DoubleStream.average()
  - reduce
```
public OptionalDouble reduce(DoubleBinaryOperator op)
```
    Description copied from interface: java.util.stream.DoubleStream
    Performs a reduction on the elements of this stream, using an associative accumulation function, and returns an OptionalDouble describing the reduced value, if any. This is equivalent to:
```
     boolean foundAny = false;
     double result = null;
     for (double element : this stream) {
         if (!foundAny) {
             foundAny = true;
             result = element;
         }
         else
             result = accumulator.applyAsDouble(result, element);
     }
     return foundAny ? OptionalDouble.of(result) : OptionalDouble.empty();
 
```
    but is not constrained to execute sequentially.
    The accumulator function must be an associative function.
    This is a terminal operation.
    Specified by:
    
    reduce in interface DoubleStream
    
    Parameters:
    
    op - an associative, non-interfering, stateless function for combining two values
    
    Returns:
    
    the result of the reduction
    
    See Also:
    
    DoubleStream.reduce(double, DoubleBinaryOperator)
  - foldLeft
```
public OptionalDouble foldLeft(DoubleBinaryOperator accumulator)
```
    Folds the elements of this stream using the provided accumulation function, going left to right. This is equivalent to:
```
 
     boolean foundAny = false;
     double result = 0;
     for (double element : this stream) {
         if (!foundAny) {
             foundAny = true;
             result = element;
         }
         else
             result = accumulator.apply(result, element);
     }
     return foundAny ? OptionalDouble.of(result) : OptionalDouble.empty();
 
 
```
    This is a terminal operation.
    This method cannot take all the advantages of parallel streams as it must process elements strictly left to right. If your accumulator function is associative, consider using reduce(DoubleBinaryOperator) method.
    For parallel stream it's not guaranteed that accumulator will always be executed in the same thread.
    Parameters:
    
    accumulator - a non-interfering , stateless function for incorporating an additional element into a result
    
    Returns:
    
    the result of the folding
    
    Since:
    
    0.4.0
    
    See Also:
    
    foldLeft(double, DoubleBinaryOperator), reduce(DoubleBinaryOperator)
  - foldLeft
```
public double foldLeft(double seed,
                       DoubleBinaryOperator accumulator)
```
    Folds the elements of this stream using the provided seed object and accumulation function, going left to right. This is equivalent to:
```
 
     double result = identity;
     for (double element : this stream)
         result = accumulator.apply(result, element)
     return result;
 
 
```
    This is a terminal operation.
    This method cannot take all the advantages of parallel streams as it must process elements strictly left to right. If your accumulator function is associative, consider using reduce(double, DoubleBinaryOperator) method.
    For parallel stream it's not guaranteed that accumulator will always be executed in the same thread.
    Parameters:
    
    seed - the starting value
    
    accumulator - a non-interfering , stateless function for incorporating an additional element into a result
    
    Returns:
    
    the result of the folding
    
    Since:
    
    0.4.0
    
    See Also:
    
    reduce(double, DoubleBinaryOperator), foldLeft(DoubleBinaryOperator)
  - scanLeft
```
public double[] scanLeft(DoubleBinaryOperator accumulator)
```
    Produces an array containing cumulative results of applying the accumulation function going left to right.
    This is a terminal operation.
    For parallel stream it's not guaranteed that accumulator will always be executed in the same thread.
    This method cannot take all the advantages of parallel streams as it must process elements strictly left to right.
    
    Parameters:
    
    accumulator - a non-interfering , stateless function for incorporating an additional element into a result
    
    Returns:
    
    the array where the first element is the first element of this stream and every successor element is the result of applying accumulator function to the previous array element and the corresponding stream element. The resulting array has the same length as this stream.
    
    Since:
    
    0.5.1
    
    See Also:
    
    foldLeft(DoubleBinaryOperator)
  - scanLeft
```
public double[] scanLeft(double seed,
                         DoubleBinaryOperator accumulator)
```
    Produces an array containing cumulative results of applying the accumulation function going left to right using given seed value.
    This is a terminal operation.
    For parallel stream it's not guaranteed that accumulator will always be executed in the same thread.
    This method cannot take all the advantages of parallel streams as it must process elements strictly left to right.
    
    Parameters:
    
    seed - the starting value
    
    accumulator - a non-interfering , stateless function for incorporating an additional element into a result
    
    Returns:
    
    the array where the first element is the seed and every successor element is the result of applying accumulator function to the previous array element and the corresponding stream element. The resulting array is one element longer than this stream.
    
    Since:
    
    0.5.1
    
    See Also:
    
    foldLeft(double, DoubleBinaryOperator)
  - collect
```
public <R> R collect(Supplier<R> supplier,
                     ObjDoubleConsumer<R> accumulator,
                     BiConsumer<R,R> combiner)
```
    Performs a mutable reduction operation on the elements of this stream. A mutable reduction is one in which the reduced value is a mutable result container, such as an ArrayList, and elements are incorporated by updating the state of the result rather than by replacing the result. This produces a result equivalent to:
```
     R result = supplier.get();
     for (double element : this stream)
         accumulator.accept(result, element);
     return result;
 
```
    Like DoubleStream.reduce(double, DoubleBinaryOperator), collect operations can be parallelized without requiring additional synchronization.
    This is a terminal operation.
    Specified by:
    
    collect in interface DoubleStream
    
    Type Parameters:
    
    R - type of the result
    
    Parameters:
    
    supplier - a function that creates a new result container. For a parallel execution, this function may be called multiple times and must return a fresh value each time.
    
    accumulator - an associative, non-interfering, stateless function for incorporating an additional element into a result
    
    combiner - an associative, non-interfering, stateless function for combining two values, which must be compatible with the accumulator function
    
    Returns:
    
    the result of the reduction
    
    See Also:
    
    collect(DoubleCollector)
  - collect
```
public <A,R> R 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.
    Like reduce(double, DoubleBinaryOperator), collect operations can be parallelized without requiring additional synchronization.
    This is a terminal operation.
    
    Type Parameters:
    
    A - the intermediate accumulation type of the DoubleCollector
    
    R - type of the result
    
    Parameters:
    
    collector - the DoubleCollector describing the reduction
    
    Returns:
    
    the result of the reduction
    
    Since:
    
    0.3.0
    
    See Also:
    
    collect(Supplier, ObjDoubleConsumer, BiConsumer)
  - sum
```
public double sum()
```
    Description copied from interface: java.util.stream.DoubleStream
    Returns the sum of elements in this stream. Summation is a special case of a reduction. If floating-point summation were exact, this method would be equivalent to:
```
     return reduce(0, Double::sum);
 
```
    However, since floating-point summation is not exact, the above code is not necessarily equivalent to the summation computation done by this method.
    If any stream element is a NaN or the sum is at any point a NaN then the sum will be NaN. The value of a floating-point sum is a function both of the input values as well as the order of addition operations. The order of addition operations of this method is intentionally not defined to allow for implementation flexibility to improve the speed and accuracy of the computed result. In particular, this method may be implemented using compensated summation or other technique to reduce the error bound in the numerical sum compared to a simple summation of double values.
    This is a terminal operation.
    Specified by:
    
    sum in interface DoubleStream
    
    Returns:
    
    the sum of elements in this stream
  - min
```
public OptionalDouble min()
```
    Description copied from interface: java.util.stream.DoubleStream
    Returns an OptionalDouble describing the minimum element of this stream, or an empty OptionalDouble if this stream is empty. The minimum element will be Double.NaN if any stream element was NaN. Unlike the numerical comparison operators, this method considers negative zero to be strictly smaller than positive zero. This is a special case of a reduction and is equivalent to:
```
     return reduce(Double::min);
 
```
    This is a terminal operation.
    Specified by:
    
    min in interface DoubleStream
    
    Returns:
    
    an OptionalDouble containing the minimum element of this stream, or an empty optional if the stream is empty
  - min
```
public OptionalDouble min(Comparator<Double> comparator)
```
    Returns the minimum element of this stream according to the provided Comparator.
    This is a terminal operation.
    
    Parameters:
    
    comparator - a non-interfering, stateless Comparator to compare elements of this stream
    
    Returns:
    
    an OptionalDouble describing the minimum element of this stream, or an empty OptionalDouble if the stream is empty
    
    Since:
    
    0.1.2
  - minBy
```
public <V extends Comparable<? super V>> OptionalDouble minBy(DoubleFunction<V> keyExtractor)
```
    Returns the minimum element of this stream according to the provided key extractor function.
    This is a terminal operation.
    
    Type Parameters:
    
    V - the type of the Comparable sort key
    
    Parameters:
    
    keyExtractor - a non-interfering, stateless function
    
    Returns:
    
    an OptionalDouble describing the first element of this stream for which the lowest value was returned by key extractor, or an empty OptionalDouble if the stream is empty
    
    Since:
    
    0.1.2
  - minByInt
```
public OptionalDouble minByInt(DoubleToIntFunction keyExtractor)
```
    Returns the minimum element of this stream according to the provided key extractor function.
    This is a terminal operation.
    
    Parameters:
    
    keyExtractor - a non-interfering, stateless function
    
    Returns:
    
    an OptionalDouble describing the first element of this stream for which the lowest value was returned by key extractor, or an empty OptionalDouble if the stream is empty
    
    Since:
    
    0.1.2
  - minByLong
```
public OptionalDouble minByLong(DoubleToLongFunction keyExtractor)
```
    Returns the minimum element of this stream according to the provided key extractor function.
    This is a terminal operation.
    
    Parameters:
    
    keyExtractor - a non-interfering, stateless function
    
    Returns:
    
    an OptionalDouble describing the first element of this stream for which the lowest value was returned by key extractor, or an empty OptionalDouble if the stream is empty
    
    Since:
    
    0.1.2
  - minByDouble
```
public OptionalDouble minByDouble(DoubleUnaryOperator keyExtractor)
```
    Returns the minimum element of this stream according to the provided key extractor function.
    This is a terminal operation.
    
    Parameters:
    
    keyExtractor - a non-interfering, stateless function
    
    Returns:
    
    an OptionalDouble describing the first element of this stream for which the lowest value was returned by key extractor, or an empty OptionalDouble if the stream is empty
    
    Since:
    
    0.1.2
  - max
```
public OptionalDouble max()
```
    Description copied from interface: java.util.stream.DoubleStream
    Returns an OptionalDouble describing the maximum element of this stream, or an empty OptionalDouble if this stream is empty. The maximum element will be Double.NaN if any stream element was NaN. Unlike the numerical comparison operators, this method considers negative zero to be strictly smaller than positive zero. This is a special case of a reduction and is equivalent to:
```
     return reduce(Double::max);
 
```
    This is a terminal operation.
    Specified by:
    
    max in interface DoubleStream
    
    Returns:
    
    an OptionalDouble containing the maximum element of this stream, or an empty optional if the stream is empty
  - max
```
public OptionalDouble max(Comparator<Double> comparator)
```
    Returns the maximum element of this stream according to the provided Comparator.
    This is a terminal operation.
    
    Parameters:
    
    comparator - a non-interfering, stateless Comparator to compare elements of this stream
    
    Returns:
    
    an OptionalDouble describing the maximum element of this stream, or an empty OptionalDouble if the stream is empty
  - maxBy
```
public <V extends Comparable<? super V>> OptionalDouble maxBy(DoubleFunction<V> keyExtractor)
```
    Returns the maximum element of this stream according to the provided key extractor function.
    This is a terminal operation.
    
    Type Parameters:
    
    V - the type of the Comparable sort key
    
    Parameters:
    
    keyExtractor - a non-interfering, stateless function
    
    Returns:
    
    an OptionalDouble describing the first element of this stream for which the highest value was returned by key extractor, or an empty OptionalDouble if the stream is empty
    
    Since:
    
    0.1.2
  - maxByInt
```
public OptionalDouble maxByInt(DoubleToIntFunction keyExtractor)
```
    Returns the maximum element of this stream according to the provided key extractor function.
    This is a terminal operation.
    
    Parameters:
    
    keyExtractor - a non-interfering, stateless function
    
    Returns:
    
    an OptionalDouble describing the first element of this stream for which the highest value was returned by key extractor, or an empty OptionalDouble if the stream is empty
    
    Since:
    
    0.1.2
  - maxByLong
```
public OptionalDouble maxByLong(DoubleToLongFunction keyExtractor)
```
    Returns the maximum element of this stream according to the provided key extractor function.
    This is a terminal operation.
    
    Parameters:
    
    keyExtractor - a non-interfering, stateless function
    
    Returns:
    
    an OptionalDouble describing the first element of this stream for which the highest value was returned by key extractor, or an empty OptionalDouble if the stream is empty
    
    Since:
    
    0.1.2
  - maxByDouble
```
public OptionalDouble maxByDouble(DoubleUnaryOperator keyExtractor)
```
    Returns the maximum element of this stream according to the provided key extractor function.
    This is a terminal operation.
    
    Parameters:
    
    keyExtractor - a non-interfering, stateless function
    
    Returns:
    
    an OptionalDouble describing the first element of this stream for which the highest value was returned by key extractor, or an empty OptionalDouble if the stream is empty
    
    Since:
    
    0.1.2
  - count
```
public long count()
```
    Description copied from interface: java.util.stream.DoubleStream
    Returns the count of elements in this stream. This is a special case of a reduction and is equivalent to:
```
     return mapToLong(e -> 1L).sum();
 
```
    This is a terminal operation.
    Specified by:
    
    count in interface DoubleStream
    
    Returns:
    
    the count of elements in this stream
  - average
```
public OptionalDouble average()
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns an OptionalDouble describing the arithmetic mean of elements of this stream, or an empty optional if this stream is empty. If any recorded value is a NaN or the sum is at any point a NaN then the average will be NaN.
    The average returned can vary depending upon the order in which values are recorded. This method may be implemented using compensated summation or other technique to reduce the error bound in the numerical sum used to compute the average.
    The average is a special case of a reduction.
    This is a terminal operation.
    
    Specified by:
    
    average in interface DoubleStream
    
    Returns:
    
    an OptionalDouble containing the average element of this stream, or an empty optional if the stream is empty
  - summaryStatistics
```
public DoubleSummaryStatistics summaryStatistics()
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns a DoubleSummaryStatistics describing various summary data about the elements of this stream. This is a special case of a reduction.
    This is a terminal operation.
    
    Specified by:
    
    summaryStatistics in interface DoubleStream
    
    Returns:
    
    a DoubleSummaryStatistics describing various summary data about the elements of this stream
  - anyMatch
```
public boolean anyMatch(DoublePredicate predicate)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns whether any elements of this stream match the provided predicate. May not evaluate the predicate on all elements if not necessary for determining the result. If the stream is empty then false is returned and the predicate is not evaluated.
    This is a short-circuiting terminal operation.
    
    Specified by:
    
    anyMatch in interface DoubleStream
    
    Parameters:
    
    predicate - a non-interfering, stateless predicate to apply to elements of this stream
    
    Returns:
    
    true if any elements of the stream match the provided predicate, otherwise false
  - allMatch
```
public boolean allMatch(DoublePredicate predicate)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns whether all elements of this stream match the provided predicate. May not evaluate the predicate on all elements if not necessary for determining the result. If the stream is empty then true is returned and the predicate is not evaluated.
    This is a short-circuiting terminal operation.
    
    Specified by:
    
    allMatch in interface DoubleStream
    
    Parameters:
    
    predicate - a non-interfering, stateless predicate to apply to elements of this stream
    
    Returns:
    
    true if either all elements of the stream match the provided predicate or the stream is empty, otherwise false
  - noneMatch
```
public boolean noneMatch(DoublePredicate predicate)
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns whether no elements of this stream match the provided predicate. May not evaluate the predicate on all elements if not necessary for determining the result. If the stream is empty then true is returned and the predicate is not evaluated.
    This is a short-circuiting terminal operation.
    
    Specified by:
    
    noneMatch in interface DoubleStream
    
    Parameters:
    
    predicate - a non-interfering, stateless predicate to apply to elements of this stream
    
    Returns:
    
    true if either no elements of the stream match the provided predicate or the stream is empty, otherwise false
  - findFirst
```
public OptionalDouble findFirst()
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns an OptionalDouble describing the first element of this stream, or an empty OptionalDouble if the stream is empty. If the stream has no encounter order, then any element may be returned.
    This is a short-circuiting terminal operation.
    
    Specified by:
    
    findFirst in interface DoubleStream
    
    Returns:
    
    an OptionalDouble describing the first element of this stream, or an empty OptionalDouble if the stream is empty
  - findFirst
```
public OptionalDouble findFirst(DoublePredicate predicate)
```
    Returns an OptionalDouble describing the first element of this stream, which matches given predicate, or an empty OptionalDouble if there's no matching element.
    This is a short-circuiting terminal operation.
    
    Parameters:
    
    predicate - a non-interfering , stateless predicate which returned value should match
    
    Returns:
    
    an OptionalDouble describing the first matching element of this stream, or an empty OptionalDouble if there's no matching element
    
    See Also:
    
    findFirst()
  - findAny
```
public OptionalDouble findAny()
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns an OptionalDouble describing some element of the stream, or an empty OptionalDouble if the stream is empty.
    This is a short-circuiting terminal operation.
    The behavior of this operation is explicitly nondeterministic; it is free to select any element in the stream. This is to allow for maximal performance in parallel operations; the cost is that multiple invocations on the same source may not return the same result. (If a stable result is desired, use DoubleStream.findFirst() instead.)
    
    Specified by:
    
    findAny in interface DoubleStream
    
    Returns:
    
    an OptionalDouble describing some element of this stream, or an empty OptionalDouble if the stream is empty
    
    See Also:
    
    DoubleStream.findFirst()
  - findAny
```
public OptionalDouble findAny(DoublePredicate predicate)
```
    Returns an OptionalDouble describing some element of the stream, which matches given predicate, or an empty OptionalDouble if there's no matching element.
    This is a short-circuiting terminal operation.
    The behavior of this operation is explicitly nondeterministic; it is free to select any element in the stream. This is to allow for maximal performance in parallel operations; the cost is that multiple invocations on the same source may not return the same result. (If a stable result is desired, use findFirst(DoublePredicate) instead.)
    
    Parameters:
    
    predicate - a non-interfering , stateless predicate which returned value should match
    
    Returns:
    
    an OptionalDouble describing some matching element of this stream, or an empty OptionalDouble if there's no matching element
    
    See Also:
    
    findAny(), findFirst(DoublePredicate)
  - indexOf
```
public OptionalLong indexOf(DoublePredicate predicate)
```
    Returns an OptionalLong describing the zero-based index of the first element of this stream, which matches given predicate, or an empty OptionalLong if there's no matching element.
    This is a short-circuiting terminal operation.
    
    Parameters:
    
    predicate - a non-interfering , stateless predicate which returned value should match
    
    Returns:
    
    an OptionalLong describing the index of the first matching element of this stream, or an empty OptionalLong if there's no matching element.
    
    Since:
    
    0.4.0
    
    See Also:
    
    findFirst(DoublePredicate)
  - boxed
```
public StreamEx<Double> boxed()
```
    Description copied from interface: java.util.stream.DoubleStream
    
    Returns a Stream consisting of the elements of this stream, boxed to Double.
    This is an intermediate operation.
    
    Specified by:
    
    boxed in interface DoubleStream
    
    Returns:
    
    a Stream consistent of the elements of this stream, each boxed to a Double
  - sequential
```
public DoubleStreamEx sequential()
```
    Description copied from interface: java.util.stream.BaseStream
    
    Returns an equivalent stream that is sequential. May return itself, either because the stream was already sequential, or because the underlying stream state was modified to be sequential.
    This is an intermediate operation.
    
    Specified by:
    
    sequential in interface BaseStream<Double,DoubleStream>
    
    Specified by:
    
    sequential in interface DoubleStream
    
    Returns:
    
    a sequential stream
  - parallel
```
public DoubleStreamEx parallel()
```
    Returns an equivalent stream that is parallel. May return itself, either because the stream was already parallel, or because the underlying stream state was modified to be parallel.
    This is an intermediate operation.
    If this stream was created using parallel(ForkJoinPool), the new stream forgets about supplied custom ForkJoinPool and its terminal operation will be executed in common pool.
    
    Specified by:
    
    parallel in interface BaseStream<Double,DoubleStream>
    
    Specified by:
    
    parallel in interface DoubleStream
    
    Returns:
    
    a parallel stream
  - parallel
```
public DoubleStreamEx parallel(ForkJoinPool fjp)
```
    Returns an equivalent stream that is parallel and bound to the supplied ForkJoinPool.
    This is an intermediate operation.
    The terminal operation of this stream or any derived stream (except the streams created via parallel() or sequential() methods) will be executed inside the supplied ForkJoinPool. If current thread does not belong to that pool, it will wait till calculation finishes.
    
    Parameters:
    
    fjp - a ForkJoinPool to submit the stream operation to.
    
    Returns:
    
    a parallel stream bound to the supplied ForkJoinPool
  - iterator
```
public PrimitiveIterator.OfDouble iterator()
```
    Description copied from interface: java.util.stream.BaseStream
    
    Returns an iterator for the elements of this stream.
    This is a terminal operation.
    
    Specified by:
    
    iterator in interface BaseStream<Double,DoubleStream>
    
    Specified by:
    
    iterator in interface DoubleStream
    
    Returns:
    
    the element iterator for this stream
  - append
```
public DoubleStreamEx append(double... values)
```
    Returns a new DoubleStreamEx which is a concatenation of this stream and the stream containing supplied values
    This is a quasi-intermediate operation.
    
    Parameters:
    
    values - the values to append to the stream
    
    Returns:
    
    the new stream
  - append
```
public DoubleStreamEx append(DoubleStream other)
```
    Creates a lazily concatenated stream whose elements are all the elements of this stream followed by all the elements of the other stream. The resulting stream is ordered if both of the input streams are ordered, and parallel if either of the input streams is parallel. When the resulting stream is closed, the close handlers for both input streams are invoked.
    
    Parameters:
    
    other - the other stream
    
    Returns:
    
    this stream appended by the other stream
    
    See Also:
    
    DoubleStream.concat(DoubleStream, DoubleStream)
  - prepend
```
public DoubleStreamEx prepend(double... values)
```
    Returns a new DoubleStreamEx which is a concatenation of the stream containing supplied values and this stream
    This is a quasi-intermediate operation.
    
    Parameters:
    
    values - the values to prepend to the stream
    
    Returns:
    
    the new stream
  - prepend
```
public DoubleStreamEx prepend(DoubleStream other)
```
    Creates a lazily concatenated stream whose elements are all the elements of the other stream followed by all the elements of this stream. The resulting stream is ordered if both of the input streams are ordered, and parallel if either of the input streams is parallel. When the resulting stream is closed, the close handlers for both input streams are invoked.
    
    Parameters:
    
    other - the other stream
    
    Returns:
    
    this stream prepended by the other stream
    
    See Also:
    
    DoubleStream.concat(DoubleStream, DoubleStream)
  - pairMap
```
public DoubleStreamEx pairMap(DoubleBinaryOperator mapper)
```
    Returns a stream consisting of the results of applying the given function to the every adjacent pair of elements of this stream.
    This is a quasi-intermediate operation.
    The output stream will contain one element less than this stream. If this stream contains zero or one element the output stream will be empty.
    
    Parameters:
    
    mapper - a non-interfering, stateless function to apply to each adjacent pair of this stream elements.
    
    Returns:
    
    the new stream
    
    Since:
    
    0.2.1
  - joining
```
public String joining(CharSequence delimiter)
```
    Returns a String which is the concatenation of the results of calling String.valueOf(double) on each element of this stream, separated by the specified delimiter, in encounter order.
    This is a terminal operation.
    
    Parameters:
    
    delimiter - the delimiter to be used between each element
    
    Returns:
    
    the result of concatenation. For empty input stream empty String is returned.
    
    Since:
    
    0.3.1
  - joining
```
public String joining(CharSequence delimiter,
                      CharSequence prefix,
                      CharSequence suffix)
```
    Returns a String which is the concatenation of the results of calling String.valueOf(double) on each element of this stream, separated by the specified delimiter, with the specified prefix and suffix in encounter order.
    This is a terminal operation.
    
    Parameters:
    
    delimiter - the delimiter to be used between each element
    
    prefix - the sequence of characters to be used at the beginning of the joined result
    
    suffix - the sequence of characters to be used at the end of the joined result
    
    Returns:
    
    the result of concatenation. For empty input stream prefix + suffix is returned.
    
    Since:
    
    0.3.1
  - takeWhile
```
public DoubleStreamEx takeWhile(DoublePredicate predicate)
```
    Returns a stream consisting of all elements from this stream until the first element which does not match the given predicate is found.
    This is a short-circuiting stateful operation. It can be either intermediate or quasi-intermediate. When using with JDK 1.9 or higher it calls the corresponding JDK 1.9 implementation. When using with JDK 1.8 it uses own implementation.
    While this operation is quite cheap for sequential stream, it can be quite expensive on parallel pipelines.
    
    Parameters:
    
    predicate - a non-interfering, stateless predicate to apply to elements.
    
    Returns:
    
    the new stream.
    
    Since:
    
    0.3.6
    
    See Also:
    
    takeWhileInclusive(DoublePredicate), dropWhile(DoublePredicate)
  - takeWhileInclusive
```
public DoubleStreamEx takeWhileInclusive(DoublePredicate predicate)
```
    Returns a stream consisting of all elements from this stream until the first element which does not match the given predicate is found (including the first mismatching element).
    This is a quasi-intermediate operation.
    While this operation is quite cheap for sequential stream, it can be quite expensive on parallel pipelines.
    
    Parameters:
    
    predicate - a non-interfering, stateless predicate to apply to elements.
    
    Returns:
    
    the new stream.
    
    Since:
    
    0.5.5
    
    See Also:
    
    takeWhile(DoublePredicate)
  - dropWhile
```
public DoubleStreamEx dropWhile(DoublePredicate predicate)
```
    Returns a stream consisting of all elements from this stream starting from the first element which does not match the given predicate. If the predicate is true for all stream elements, an empty stream is returned.
    This is a stateful operation. It can be either intermediate or quasi-intermediate. When using with JDK 1.9 or higher it calls the corresponding JDK 1.9 implementation. When using with JDK 1.8 it uses own implementation.
    While this operation is quite cheap for sequential stream, it can be quite expensive on parallel pipelines.
    
    Parameters:
    
    predicate - a non-interfering, stateless predicate to apply to elements.
    
    Returns:
    
    the new stream.
    
    Since:
    
    0.3.6
  - prefix
```
public DoubleStreamEx prefix(DoubleBinaryOperator op)
```
    Returns a stream containing cumulative results of applying the accumulation function going left to right.
    This is a stateful quasi-intermediate operation.
    This operation resembles scanLeft(DoubleBinaryOperator), but unlike scanLeft this operation is intermediate and accumulation function must be associative.
    This method cannot take all the advantages of parallel streams as it must process elements strictly left to right. Using an unordered source or removing the ordering constraint with unordered() may improve the parallel processing speed.
    
    Parameters:
    
    op - an associative , non-interfering , stateless function for computing the next element based on the previous one
    
    Returns:
    
    the new stream.
    
    Since:
    
    0.6.1
    
    See Also:
    
    scanLeft(DoubleBinaryOperator)
  - chain
```
public <U> U chain(Function<? super DoubleStreamEx,U> mapper)
```
    Applies the supplied function to this stream and returns the result of the function.
    This method can be used to add more functionality in the fluent style. For example, consider user-defined static method batches(stream, n) which breaks the stream into batches of given length. Normally you would write batches(StreamEx.of(input).map(...), 10).filter(...). Using the chain() method you can write in more fluent manner: StreamEx.of(input).map(...).chain(s -> batches(s, 10)).filter(...).
    You could even go further and define a method which returns a function like <T> UnaryOperator<StreamEx<T>> batches(int n) and use it like this: StreamEx.of(input).map(...).chain(batches(10)).filter(...).
    
    Type Parameters:
    
    U - the type of the function result.
    
    Parameters:
    
    mapper - function to invoke.
    
    Returns:
    
    the result of the function invocation.
  - empty
```
public static DoubleStreamEx empty()
```
    Returns an empty sequential DoubleStreamEx.
    
    Specified by:
    
    empty in interface DoubleStream
    
    Returns:
    
    an empty sequential stream
  - of
```
public static DoubleStreamEx of(double element)
```
    Returns a sequential DoubleStreamEx containing a single element.
    
    Specified by:
    
    of in interface DoubleStream
    
    Parameters:
    
    element - the single element
    
    Returns:
    
    a singleton sequential stream
  - of
```
public static DoubleStreamEx of(double... elements)
```
    Returns a sequential ordered DoubleStreamEx whose elements are the specified values.
    
    Specified by:
    
    of in interface DoubleStream
    
    Parameters:
    
    elements - the elements of the new stream
    
    Returns:
    
    the new stream
  - of
```
public static DoubleStreamEx of(double[] array,
                                int startInclusive,
                                int endExclusive)
```
    Returns a sequential DoubleStreamEx with the specified range of the specified array as its source.
    
    Parameters:
    
    array - the array, assumed to be unmodified during use
    
    startInclusive - the first index to cover, inclusive
    
    endExclusive - index immediately past the last index to cover
    
    Returns:
    
    an DoubleStreamEx for the array range
    
    Throws:
    
    ArrayIndexOutOfBoundsException - if startInclusive is negative, endExclusive is less than startInclusive, or endExclusive is greater than the array size
    
    Since:
    
    0.1.1
    
    See Also:
    
    Arrays.stream(double[], int, int)
  - of
```
public static DoubleStreamEx of(Double[] array)
```
    Returns a sequential ordered DoubleStreamEx whose elements are the unboxed elements of supplied array.
    
    Parameters:
    
    array - the array to create the stream from.
    
    Returns:
    
    the new stream
    
    Since:
    
    0.5.0
    
    See Also:
    
    Arrays.stream(Object[])
  - of
```
public static DoubleStreamEx of(DoubleBuffer buf)
```
    Returns a sequential ordered DoubleStreamEx whose elements are the values in the supplied DoubleBuffer.
    The resulting stream covers only a portion of DoubleBuffer content which starts with position (inclusive) and ends with limit (exclusive). Changes in position and limit after the stream creation don't affect the stream.
    The resulting stream does not change the internal DoubleBuffer state.
    
    Parameters:
    
    buf - the DoubleBuffer to create a stream from
    
    Returns:
    
    the new stream
    
    Since:
    
    0.6.2
  - of
```
public static DoubleStreamEx of(float... elements)
```
    Returns a sequential ordered DoubleStreamEx whose elements are the specified float values casted to double.
    
    Parameters:
    
    elements - the elements of the new stream
    
    Returns:
    
    the new stream
    
    Since:
    
    0.2.0
  - of
```
public static DoubleStreamEx of(float[] array,
                                int startInclusive,
                                int endExclusive)
```
    Returns a sequential DoubleStreamEx with the specified range of the specified array as its source. Array values will be casted to double.
    
    Parameters:
    
    array - the array, assumed to be unmodified during use
    
    startInclusive - the first index to cover, inclusive
    
    endExclusive - index immediately past the last index to cover
    
    Returns:
    
    an IntStreamEx for the array range
    
    Throws:
    
    ArrayIndexOutOfBoundsException - if startInclusive is negative, endExclusive is less than startInclusive, or endExclusive is greater than the array size
    
    Since:
    
    0.2.0
  - of
```
public static DoubleStreamEx of(DoubleStream stream)
```
    Returns a DoubleStreamEx object which wraps given DoubleStream.
    The supplied stream must not be consumed or closed when this method is called. No operation must be performed on the supplied stream after it's wrapped.
    
    Parameters:
    
    stream - original stream
    
    Returns:
    
    the wrapped stream
    
    Since:
    
    0.0.8
  - of
```
public static DoubleStreamEx of(Spliterator.OfDouble spliterator)
```
    Returns a sequential DoubleStreamEx created from given Spliterator.OfDouble.
    
    Parameters:
    
    spliterator - a spliterator to create the stream from.
    
    Returns:
    
    the new stream
    
    Since:
    
    0.3.4
  - of
```
public static DoubleStreamEx of(PrimitiveIterator.OfDouble iterator)
```
    Returns a sequential, ordered DoubleStreamEx created from given PrimitiveIterator.OfDouble.
    This method is roughly equivalent to DoubleStreamEx.of(Spliterators.spliteratorUnknownSize(iterator, ORDERED)) , but may show better performance for parallel processing.
    Use this method only if you cannot provide better Stream source.
    
    Parameters:
    
    iterator - an iterator to create the stream from.
    
    Returns:
    
    the new stream
    
    Since:
    
    0.5.1
  - of
```
public static DoubleStreamEx of(OptionalDouble optional)
```
    Returns a sequential DoubleStreamEx containing an OptionalDouble value, if present, otherwise returns an empty DoubleStreamEx.
    
    Parameters:
    
    optional - the optional to create a stream of
    
    Returns:
    
    a stream with an OptionalDouble value if present, otherwise an empty stream
    
    Since:
    
    0.1.1
  - of
```
public static DoubleStreamEx of(Collection<Double> collection)
```
    Returns a sequential ordered DoubleStreamEx whose elements are the unboxed elements of supplied collection.
    
    Parameters:
    
    collection - the collection to create the stream from.
    
    Returns:
    
    the new stream
    
    See Also:
    
    Collection.stream()
  - of
```
public static DoubleStreamEx of(Random random)
```
    Returns an effectively unlimited stream of pseudorandom double values, each between zero (inclusive) and one (exclusive) produced by given Random object.
    A pseudorandom double value is generated as if it's the result of calling the method Random.nextDouble().
    
    Parameters:
    
    random - a Random object to produce the stream from
    
    Returns:
    
    a stream of pseudorandom double values
    
    See Also:
    
    Random.doubles()
  - of
```
public static DoubleStreamEx of(Random random,
                                long streamSize)
```
    Returns a stream producing the given streamSize number of pseudorandom double values, each between zero (inclusive) and one (exclusive) produced by given Random object.
    A pseudorandom double value is generated as if it's the result of calling the method Random.nextDouble().
    
    Parameters:
    
    random - a Random object to produce the stream from
    
    streamSize - the number of values to generate
    
    Returns:
    
    a stream of pseudorandom double values
    
    See Also:
    
    Random.doubles(long)
  - of
```
public static DoubleStreamEx of(Random random,
                                double randomNumberOrigin,
                                double randomNumberBound)
```
    Returns an effectively unlimited stream of pseudorandom double values, each conforming to the given origin (inclusive) and bound (exclusive) produced by given Random object.
    
    Parameters:
    
    random - a Random object to produce the stream from
    
    randomNumberOrigin - the origin (inclusive) of each random value
    
    randomNumberBound - the bound (exclusive) of each random value
    
    Returns:
    
    a stream of pseudorandom double values, each with the given origin (inclusive) and bound (exclusive)
    
    See Also:
    
    Random.doubles(double, double)
  - of
```
public static DoubleStreamEx of(Random random,
                                long streamSize,
                                double randomNumberOrigin,
                                double randomNumberBound)
```
    Returns a stream producing the given streamSize number of pseudorandom double values, each conforming to the given origin (inclusive) and bound (exclusive) produced by given Random object.
    
    Parameters:
    
    random - a Random object to produce the stream from
    
    randomNumberOrigin - the origin (inclusive) of each random value
    
    randomNumberBound - the bound (exclusive) of each random value
    
    streamSize - the number of values to generate
    
    Returns:
    
    a stream of pseudorandom double values, each with the given origin (inclusive) and bound (exclusive)
    
    See Also:
    
    Random.doubles(long, double, double)
  - iterate
```
public static DoubleStreamEx iterate(double seed,
                                     DoubleUnaryOperator f)
```
    Returns an infinite sequential ordered DoubleStreamEx produced by iterative application of a function f to an initial element seed, producing a stream consisting of seed, f(seed), f(f(seed)), etc.
    The first element (position 0) in the DoubleStreamEx will be the provided seed. For n > 0, the element at position n, will be the result of applying the function f to the element at position n - 1.
    
    Specified by:
    
    iterate in interface DoubleStream
    
    Parameters:
    
    seed - the initial element
    
    f - a function to be applied to to the previous element to produce a new element
    
    Returns:
    
    A new sequential DoubleStream
    
    See Also:
    
    iterate(double, DoublePredicate, DoubleUnaryOperator)
  - iterate
```
public static DoubleStreamEx iterate(double seed,
                                     DoublePredicate predicate,
                                     DoubleUnaryOperator f)
```
    Returns a sequential ordered DoubleStreamEx produced by iterative application of a function to an initial element, conditioned on satisfying the supplied predicate. The stream terminates as soon as the predicate function returns false.
    DoubleStreamEx.iterate should produce the same sequence of elements as produced by the corresponding for-loop:
```
     for (double index=seed; predicate.test(index); index = f.apply(index)) {
         ... 
     }
 
```
    The resulting sequence may be empty if the predicate does not hold on the seed value. Otherwise the first element will be the supplied seed value, the next element (if present) will be the result of applying the function f to the seed value, and so on iteratively until the predicate indicates that the stream should terminate.
    Parameters:
    
    seed - the initial element
    
    predicate - a predicate to apply to elements to determine when the stream must terminate.
    
    f - a function to be applied to the previous element to produce a new element
    
    Returns:
    
    a new sequential DoubleStreamEx
    
    Since:
    
    0.6.0
    
    See Also:
    
    iterate(double, DoubleUnaryOperator)
  - generate
```
public static DoubleStreamEx generate(DoubleSupplier s)
```
    Returns an infinite sequential unordered stream where each element is generated by the provided DoubleSupplier. This is suitable for generating constant streams, streams of random elements, etc.
    
    Specified by:
    
    generate in interface DoubleStream
    
    Parameters:
    
    s - the DoubleSupplier for generated elements
    
    Returns:
    
    a new infinite sequential unordered DoubleStreamEx
    
    See Also:
    
    DoubleStream.generate(DoubleSupplier)
  - produce
```
public static DoubleStreamEx produce(Predicate<DoubleConsumer> producer)
```
    Return an ordered stream produced by consecutive calls of the supplied producer until it returns false.
    The producer function may call the passed consumer any number of times and return true if the producer should be called again or false otherwise. It's guaranteed that the producer will not be called anymore, once it returns false.
    This method is particularly useful when producer changes the mutable object which should be left in known state after the full stream consumption. Note however that if a short-circuiting operation is used, then the final state of the mutable object cannot be guaranteed.
    
    Parameters:
    
    producer - a predicate which calls the passed consumer to emit stream element(s) and returns true if it producer should be applied again.
    
    Returns:
    
    the new stream
    
    Since:
    
    0.6.0
  - constant
```
public static DoubleStreamEx constant(double value,
                                      long length)
```
    Returns a sequential unordered DoubleStreamEx of given length which elements are equal to supplied value.
    
    Parameters:
    
    value - the constant value
    
    length - the length of the stream
    
    Returns:
    
    a new DoubleStreamEx
    
    Since:
    
    0.1.2
  - zip
```
public static DoubleStreamEx zip(double[] first,
                                 double[] second,
                                 DoubleBinaryOperator mapper)
```
    Returns a sequential DoubleStreamEx containing the results of applying the given function to the corresponding pairs of values in given two arrays.
    
    Parameters:
    
    first - the first array
    
    second - the second array
    
    mapper - a non-interfering, stateless function to apply to each pair of the corresponding array elements.
    
    Returns:
    
    a new DoubleStreamEx
    
    Throws:
    
    IllegalArgumentException - if length of the arrays differs.
    
    Since:
    
    0.2.1
  - spliterator
```
public SPLTR spliterator()
```
    Description copied from interface: java.util.stream.BaseStream
    
    Returns a spliterator for the elements of this stream.
    This is a terminal operation.
    
    Specified by:
    
    spliterator in interface BaseStream<T,S extends BaseStream<T,S>>
    
    Returns:
    
    the element spliterator for this stream
  - isParallel
```
public boolean isParallel()
```
    Description copied from interface: java.util.stream.BaseStream
    
    Returns whether this stream, if a terminal operation were to be executed, would execute in parallel. Calling this method after invoking an terminal stream operation method may yield unpredictable results.
    
    Specified by:
    
    isParallel in interface BaseStream<T,S extends BaseStream<T,S>>
    
    Returns:
    
    true if this stream would execute in parallel if executed
  - close
```
public void close()
```
    Description copied from interface: java.util.stream.BaseStream
    
    Closes this stream, causing all close handlers for this stream pipeline to be called.
    
    Specified by:
    
    close in interface AutoCloseable
    
    Specified by:
    
    close in interface BaseStream<T,S extends BaseStream<T,S>>
    
    See Also:
    
    AutoCloseable.close()

Class DoubleStreamEx

Nested Class Summary

Nested classes/interfaces inherited from interface DoubleStream

Method Summary

Methods inherited from class Object

Methods inherited from interface DoubleStream

Methods inherited from interface BaseStream

Method Detail

unordered

onClose

filter

remove

greater

less

atLeast

atMost

map

mapFirst

mapLast

mapToObj

mapToInt

mapToLong

mapToEntry

flatMap

flatMapToInt

flatMapToLong

flatMapToObj

distinct

sorted

sorted

reverseSorted

sortedBy

sortedByInt

sortedByLong

sortedByDouble

peek

peekFirst

peekLast

limit

skip

skipOrdered

forEach

forEachOrdered

toArray

toFloatArray

reduce

reduce

foldLeft

foldLeft

scanLeft

scanLeft

collect

collect

sum

min

min

minBy

minByInt

minByLong

minByDouble

max

max

maxBy

maxByInt

maxByLong

maxByDouble

count

average

summaryStatistics

anyMatch

allMatch

noneMatch

findFirst

findFirst

findAny

findAny

indexOf

boxed

sequential

parallel