ParallelLongArray (org.codehaus.gpars)

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groovyx.gpars.extra166y
[Java] Class ParallelLongArray

java.lang.Object
  groovyx.gpars.extra166y.AbstractParallelAnyArray.LUPap
      groovyx.gpars.extra166y.ParallelLongArray

public class ParallelLongArray
extends LUPap

An array of longs supporting parallel operations. This class provides methods supporting the same operations as ParallelArray, but specialized for scalar longs. It additionally provides a few methods specific to numerical values.

Sample usages. Here is a complete (although naive) prime filter program:

 import java.math.BigInteger;
 import jsr166y.*;
 import static extra166y.Ops.*;
 import static extra166y.ParallelLongArray.*;

 public class Sieve {
   public static void main(String[] args) {
     int n = Integer.parseInt(args[0]);
     // create array of divisors
     ParallelLongArray a = create(n-1, defaultExecutor());
     a.replaceWithMappedIndex(add2);
     int i = 0;
     long p = 2;
     while (p * p < n) { // repeatedly filter
         a = a.withFilter(notDivisibleBy(p)).all();
         p = a.get(++i);
     }
     System.out.printf("sieve(%d) = %s%n", n, a);
     // check result
     if (!a.withFilter(notProbablePrime).isEmpty())
         throw new Error();
   }
   static IntToLong add2 = new IntToLong() {
     public long op(int i) { return i + 2; } };
   static LongPredicate notDivisibleBy(final long p) {
     return new LongPredicate() {
       public boolean op(long n) { return n <= p || (n % p) != 0; }
     }; }
   static LongPredicate notProbablePrime = new LongPredicate() {
     private static final int CERTAINTY = 8;
     public boolean op(long n) {
       return !BigInteger.valueOf(n).isProbablePrime(CERTAINTY);
     }
   };
 }

Nested Class Summary
`class`	`ParallelLongArray.AsList`
`class`	`ParallelLongArray.ListIter`
`static class`	`ParallelLongArray.ParallelLongArrayIterator`
`static interface`	`ParallelLongArray.SummaryStatistics` Summary statistics for a possibly bounded, filtered, and/or mapped ParallelLongArray.

Field Summary
`ParallelLongArray.AsList`	`listView`

Constructor Summary
`protected ParallelLongArray(ForkJoinPool executor, long[] array, int limit)` Constructor for use by subclasses to create a new ParallelLongArray using the given executor, and initially using the supplied array, with effective size bound by the given limit.
`ParallelLongArray(ForkJoinPool executor, long[] array)` Trusted internal version of protected constructor.

Method Summary
`ParallelLongArray`	`addAll(long[] other)` Equivalent to `asList().addAll` but specialized for array arguments and likely to be more efficient.
`ParallelLongArray`	`addAll(ParallelLongArrayWithLongMapping other)` Appends all (possibly bounded, filtered, or mapped) elements of the given ParallelDoubleArray, resizing and/or reallocating this array if necessary.
`ParallelLongArray`	`all()` Returns a new ParallelLongArray holding all elements.
`ParallelLongArray`	`allUniqueElements()` Returns a new ParallelLongArray containing only the unique elements of this array (that is, without any duplicates).
`void`	`appendElement(long e)`
`void`	`apply(LongProcedure procedure)`
`java.util.List`	`asList()` Returns a view of this ParallelLongArray as a List.
`int`	`binarySearch(long target)` Assuming this array is sorted, returns the index of an element equal to given target, or -1 if not present.
`int`	`binarySearch(long target, LongComparator comparator)` Assuming this array is sorted with respect to the given comparator, returns the index of an element equal to given target, or -1 if not present.
`static ParallelLongArray`	`create(int size, ForkJoinPool executor)` Creates a new ParallelLongArray using the given executor and an array of the given size.
`static ParallelLongArray`	`createEmpty(int size, ForkJoinPool executor)` Creates a new ParallelLongArray using the given executor and an array of the given size, but with an initial effective size of zero, enabling incremental insertion via ParallelLongArray#asList#asList operations.
`static ParallelLongArray`	`createFromCopy(long[] source, ForkJoinPool executor)` Creates a new ParallelLongArray using the given executor and initially holding copies of the given source elements.
`static ParallelLongArray`	`createFromCopy(int size, long[] source, ForkJoinPool executor)` Creates a new ParallelLongArray using an array of the given size, initially holding copies of the given source truncated or padded with zeros to obtain the specified length.
`static ParallelLongArray`	`createUsingHandoff(long[] handoff, ForkJoinPool executor)` Creates a new ParallelLongArray initially using the given array and executor.
`ParallelLongArray`	`cumulate(LongReducer reducer, long base)` Replaces each element with the running cumulation of applying the given reducer.
`ParallelLongArray`	`cumulateSum()` Replaces each element with the running sum.
`static ForkJoinPool`	`defaultExecutor()` Returns a common default executor for use in ParallelArrays.
`long`	`get(int i)`
`long[]`	`getArray()`
`ForkJoinPool`	`getExecutor()`
`boolean`	`hasAllEqualElements(ParallelLongArrayWithLongMapping other)` Returns true if all elements at the same relative positions of this and other array are equal.
`int`	`indexOf(long target)` Returns the index of some element equal to given target, or -1 if not present.
`void`	`insertElementAt(int index, long e)`
`void`	`insertSlotsAt(int index, int len)` Makes len slots available at index.
`java.util.Iterator`	`iterator()` Returns an iterator stepping through each element of the array up to the current limit.
`long`	`max(LongComparator comparator)` Returns the maximum element, or Long.MIN_VALUE if empty.
`long`	`max()` Returns the maximum element, or Long.MIN_VALUE if empty.
`long`	`min(LongComparator comparator)` Returns the minimum element, or Long.MAX_VALUE if empty.
`long`	`min()` Returns the minimum element, or Long.MAX_VALUE if empty.
`long`	`precumulate(LongReducer reducer, long base)` Replaces each element with the cumulation of applying the given reducer to all previous values, and returns the total reduction.
`long`	`precumulateSum()` Replaces each element with its prefix sum.
`long`	`reduce(LongReducer reducer, long base)` Returns reduction of elements.
`ParallelLongArray`	`removeAll(LongPredicate selector)` Removes from the array all elements for which the given selector holds.
`ParallelLongArray`	`removeConsecutiveDuplicates()` Removes consecutive elements that are equal, shifting others leftward, and possibly decreasing size.
`void`	`removeSlotAt(int index)`
`void`	`removeSlotsAt(int fromIndex, int toIndex)`
`void`	`replaceElementsParallelLongArrayWith(long[] a)`
`ParallelLongArray`	`replaceWithGeneratedValue(LongGenerator generator)` Replaces elements with the results of applying the given generator.
`ParallelLongArray`	`replaceWithMappedIndex(IntToLong op)` Replaces elements with the results of applying the given op to their indices.
`ParallelLongArray`	`replaceWithMappedIndex(IntAndLongToLong op)` Replaces elements with the results of applying the given mapping to each index and current element value.
`ParallelLongArray`	`replaceWithMapping(LongOp op)` Replaces elements with the results of applying the given op to their current values.
`ParallelLongArray`	`replaceWithMapping(BinaryLongOp combiner, ParallelLongArrayWithLongMapping other)` Replaces elements with results of applying `op(thisElement, otherElement)`.
`ParallelLongArray`	`replaceWithMapping(BinaryLongOp combiner, long[] other)` Replaces elements with results of applying `op(thisElement, otherElement)`.
`ParallelLongArray`	`replaceWithValue(long value)` Replaces elements with the given value.
`void`	`resizeArray(int newCap)`
`int`	`seqIndexOf(long target)`
`int`	`seqLastIndexOf(long target)`
`void`	`set(int i, long x)`
`void`	`setLimit(int newLimit)`
`int`	`size()` Returns the effective size of the underlying array.
`ParallelLongArray`	`sort(LongComparator comparator)` Sorts the array.
`ParallelLongArray`	`sort()` Sorts the array, assuming all elements are Comparable.
`long`	`sum()` Returns the sum of elements.
`SummaryStatistics`	`summary(LongComparator comparator)` Returns summary statistics, using the given comparator to locate minimum and maximum elements.
`SummaryStatistics`	`summary()` Returns summary statistics, using natural comparator.
`java.lang.String`	`toString()`
`ParallelLongArrayWithBounds`	`withBounds(int firstIndex, int upperBound)` Returns an operation prefix that causes a method to operate only on the elements of the array between firstIndex (inclusive) and upperBound (exclusive).
`ParallelLongArrayWithFilter`	`withFilter(LongPredicate selector)` Returns an operation prefix that causes a method to operate only on the elements of the array for which the given selector returns true.
`ParallelLongArrayWithFilter`	`withFilter(BinaryLongPredicate selector, ParallelLongArrayWithLongMapping other)` Returns an operation prefix that causes a method to operate only on elements for which the given binary selector returns true.
`ParallelLongArrayWithFilter`	`withIndexedFilter(IntAndLongPredicate selector)` Returns an operation prefix that causes a method to operate only on elements for which the given indexed selector returns true.
`ParallelLongArrayWithMapping`	`withIndexedMapping(IntAndLongToObject mapper)` Returns an operation prefix that causes a method to operate on mappings of this array using the given mapper that accepts as arguments an element's current index and value, and produces a new value.
`ParallelLongArrayWithDoubleMapping`	`withIndexedMapping(IntAndLongToDouble mapper)` Returns an operation prefix that causes a method to operate on mappings of this array using the given mapper that accepts as arguments an element's current index and value, and produces a new value.
`ParallelLongArrayWithLongMapping`	`withIndexedMapping(IntAndLongToLong mapper)` Returns an operation prefix that causes a method to operate on mappings of this array using the given mapper that accepts as arguments an element's current index and value, and produces a new value.
`ParallelLongArrayWithMapping`	`withMapping(LongToObject op)` Returns an operation prefix that causes a method to operate on mapped elements of the array using the given op.
`ParallelLongArrayWithLongMapping`	`withMapping(LongOp op)` Returns an operation prefix that causes a method to operate on mapped elements of the array using the given op.
`ParallelLongArrayWithDoubleMapping`	`withMapping(LongToDouble op)` Returns an operation prefix that causes a method to operate on mapped elements of the array using the given op.
`ParallelLongArrayWithMapping`	`withMapping(LongAndObjectToObject combiner, ParallelArrayWithMapping other)` Returns an operation prefix that causes a method to operate on binary mappings of this array and the other array.
`ParallelLongArrayWithMapping`	`withMapping(LongAndDoubleToObject combiner, ParallelDoubleArrayWithDoubleMapping other)` Returns an operation prefix that causes a method to operate on binary mappings of this array and the other array.
`ParallelLongArrayWithMapping`	`withMapping(LongAndLongToObject combiner, ParallelLongArrayWithLongMapping other)` Returns an operation prefix that causes a method to operate on binary mappings of this array and the other array.
`ParallelLongArrayWithDoubleMapping`	`withMapping(LongAndObjectToDouble combiner, ParallelArrayWithMapping other)` Returns an operation prefix that causes a method to operate on binary mappings of this array and the other array.
`ParallelLongArrayWithDoubleMapping`	`withMapping(LongAndDoubleToDouble combiner, ParallelDoubleArrayWithDoubleMapping other)` Returns an operation prefix that causes a method to operate on binary mappings of this array and the other array.
`ParallelLongArrayWithDoubleMapping`	`withMapping(LongAndLongToDouble combiner, ParallelLongArrayWithLongMapping other)` Returns an operation prefix that causes a method to operate on binary mappings of this array and the other array.
`ParallelLongArrayWithLongMapping`	`withMapping(LongAndObjectToLong combiner, ParallelArrayWithMapping other)` Returns an operation prefix that causes a method to operate on binary mappings of this array and the other array.
`ParallelLongArrayWithLongMapping`	`withMapping(LongAndDoubleToLong combiner, ParallelDoubleArrayWithDoubleMapping other)` Returns an operation prefix that causes a method to operate on binary mappings of this array and the other array.
`ParallelLongArrayWithLongMapping`	`withMapping(BinaryLongOp combiner, ParallelLongArrayWithLongMapping other)` Returns an operation prefix that causes a method to operate on binary mappings of this array and the other array.

Field Detail

listView

ParallelLongArray.AsList listView

Constructor Detail

ParallelLongArray

protected ParallelLongArray(ForkJoinPool executor, long[] array, int limit)

Constructor for use by subclasses to create a new ParallelLongArray using the given executor, and initially using the supplied array, with effective size bound by the given limit. This constructor is designed to enable extensions via subclassing. To create a ParallelLongArray, use create, createEmpty, createUsingHandoff or createFromCopy.

Parameters:: executor - the executor; array - the array; limit - the upper bound limit

ParallelLongArray

ParallelLongArray(ForkJoinPool executor, long[] array)

Trusted internal version of protected constructor.

Method Detail

addAll

public ParallelLongArray addAll(long[] other)

Equivalent to asList().addAll but specialized for array arguments and likely to be more efficient.

Parameters:: other - the elements to add

Returns:: this (to simplify use in expressions)

addAll

public ParallelLongArray addAll(ParallelLongArrayWithLongMapping other)

Appends all (possibly bounded, filtered, or mapped) elements of the given ParallelDoubleArray, resizing and/or reallocating this array if necessary.

Parameters:: other - the elements to add

Returns:: this (to simplify use in expressions)

all

public ParallelLongArray all()

Returns a new ParallelLongArray holding all elements.

Returns:: a new ParallelLongArray holding all elements

allUniqueElements

public ParallelLongArray allUniqueElements()

Returns a new ParallelLongArray containing only the unique elements of this array (that is, without any duplicates).

Returns:: the new ParallelLongArray

appendElement

final void appendElement(long e)

apply

public void apply(LongProcedure procedure)

asList

public java.util.List asList()

Returns a view of this ParallelLongArray as a List. This List has the same structural and performance characteristics as java.util.ArrayList, and may be used to modify, replace or extend the bounds of the array underlying this ParallelLongArray. The methods supported by this list view are not in general implemented as parallel operations. This list is also not itself thread-safe. In particular, performing list updates while other parallel operations are in progress has undefined (and surely undesired) effects.

Returns:: a list view

binarySearch

public int binarySearch(long target)

Assuming this array is sorted, returns the index of an element equal to given target, or -1 if not present. If the array is not sorted, the results are undefined.

Parameters:: target - the element to search for

Returns:: the index or -1 if not present

binarySearch

public int binarySearch(long target, LongComparator comparator)

Assuming this array is sorted with respect to the given comparator, returns the index of an element equal to given target, or -1 if not present. If the array is not sorted, the results are undefined.

Parameters:: target - the element to search for; comparator - the comparator

Returns:: the index or -1 if not present

create

public static ParallelLongArray create(int size, ForkJoinPool executor)

Creates a new ParallelLongArray using the given executor and an array of the given size.

Parameters:: size - the array size; executor - the executor

createEmpty

public static ParallelLongArray createEmpty(int size, ForkJoinPool executor)

Creates a new ParallelLongArray using the given executor and an array of the given size, but with an initial effective size of zero, enabling incremental insertion via ParallelLongArray#asList#asList operations.

Parameters:: size - the array size; executor - the executor

createFromCopy

public static ParallelLongArray createFromCopy(long[] source, ForkJoinPool executor)

Creates a new ParallelLongArray using the given executor and initially holding copies of the given source elements.

Parameters:: source - the source of initial elements; executor - the executor

createFromCopy

public static ParallelLongArray createFromCopy(int size, long[] source, ForkJoinPool executor)

Creates a new ParallelLongArray using an array of the given size, initially holding copies of the given source truncated or padded with zeros to obtain the specified length.

Parameters:: source - the source of initial elements; size - the array size; executor - the executor

createUsingHandoff

public static ParallelLongArray createUsingHandoff(long[] handoff, ForkJoinPool executor)

Creates a new ParallelLongArray initially using the given array and executor. In general, the handed off array should not be used for other purposes once constructing this ParallelLongArray. The given array may be internally replaced by another array in the course of methods that add or remove elements.

Parameters:: handoff - the array; executor - the executor

cumulate

public ParallelLongArray cumulate(LongReducer reducer, long base)

Replaces each element with the running cumulation of applying the given reducer. For example, if the contents are the numbers 1, 2, 3, and the reducer operation adds numbers, then after invocation of this method, the contents would be

1,
 3, 6

(that is, 1, 1+2, 1+2+3).

Parameters:: reducer - the reducer; base - the result for an empty array

Returns:: this (to simplify use in expressions)

cumulateSum

public ParallelLongArray cumulateSum()

Replaces each element with the running sum.

Returns:: this (to simplify use in expressions)

defaultExecutor

public static ForkJoinPool defaultExecutor()

Returns a common default executor for use in ParallelArrays. This executor arranges enough parallelism to use most, but not necessarily all, of the available processors on this system.

Returns:: the executor

get

public long get(int i)

getArray

public long[] getArray()

getExecutor

public ForkJoinPool getExecutor()

hasAllEqualElements

public boolean hasAllEqualElements(ParallelLongArrayWithLongMapping other)

Returns true if all elements at the same relative positions of this and other array are equal.

Parameters:: other - the other array

indexOf

public int indexOf(long target)

Returns the index of some element equal to given target, or -1 if not present.

Parameters:: target - the element to search for

Returns:: the index or -1 if not present

insertElementAt

final void insertElementAt(int index, long e)

insertSlotsAt

final void insertSlotsAt(int index, int len)

Makes len slots available at index.

iterator

public java.util.Iterator iterator()

Returns an iterator stepping through each element of the array up to the current limit. This iterator does not support the remove operation. However, a full ListIterator supporting add, remove, and set operations is available via asList.

Returns:: an iterator stepping through each element

max

public long max(LongComparator comparator)

Returns the maximum element, or Long.MIN_VALUE if empty.

Parameters:: comparator - the comparator

Returns:: maximum element, or Long.MIN_VALUE if empty

max

public long max()

Returns the maximum element, or Long.MIN_VALUE if empty.

Returns:: maximum element, or Long.MIN_VALUE if empty

min

public long min(LongComparator comparator)

Returns the minimum element, or Long.MAX_VALUE if empty.

Parameters:: comparator - the comparator

Returns:: minimum element, or Long.MAX_VALUE if empty

min

public long min()

Returns the minimum element, or Long.MAX_VALUE if empty.

Returns:: minimum element, or Long.MAX_VALUE if empty

precumulate

public long precumulate(LongReducer reducer, long base)

Replaces each element with the cumulation of applying the given reducer to all previous values, and returns the total reduction. For example, if the contents are the numbers

1,
 2, 3

, and the reducer operation adds numbers, then after invocation of this method, the contents would be

0, 1,
 3

(that is, 0, 0+1, 0+1+2, and the return value would be 6 (that is, 1+2+3).

Parameters:: reducer - the reducer; base - the result for an empty array

Returns:: the total reduction

precumulateSum

public long precumulateSum()

Replaces each element with its prefix sum.

Returns:: the total sum

reduce

public long reduce(LongReducer reducer, long base)

Returns reduction of elements.

Parameters:: reducer - the reducer; base - the result for an empty array

Returns:: reduction

removeAll

public ParallelLongArray removeAll(LongPredicate selector)

Removes from the array all elements for which the given selector holds.

Parameters:: selector - the selector

Returns:: this (to simplify use in expressions)

removeConsecutiveDuplicates

public ParallelLongArray removeConsecutiveDuplicates()

Removes consecutive elements that are equal, shifting others leftward, and possibly decreasing size. This method may be used after sorting to ensure that this ParallelLongArray contains a set of unique elements.

Returns:: this (to simplify use in expressions)

removeSlotAt

final void removeSlotAt(int index)

removeSlotsAt

final void removeSlotsAt(int fromIndex, int toIndex)

replaceElementsParallelLongArrayWith

final void replaceElementsParallelLongArrayWith(long[] a)

replaceWithGeneratedValue

public ParallelLongArray replaceWithGeneratedValue(LongGenerator generator)

Replaces elements with the results of applying the given generator. For example, to fill the array with uniform random values, use replaceWithGeneratedValue(Ops.longRandom()).

Parameters:: generator - the generator

Returns:: this (to simplify use in expressions)

replaceWithMappedIndex

public ParallelLongArray replaceWithMappedIndex(IntToLong op)

Replaces elements with the results of applying the given op to their indices.

Parameters:: op - the op

Returns:: this (to simplify use in expressions)

replaceWithMappedIndex

public ParallelLongArray replaceWithMappedIndex(IntAndLongToLong op)

Replaces elements with the results of applying the given mapping to each index and current element value.

Parameters:: op - the op

Returns:: this (to simplify use in expressions)

replaceWithMapping

public ParallelLongArray replaceWithMapping(LongOp op)

Replaces elements with the results of applying the given op to their current values.

Parameters:: op - the op

Returns:: this (to simplify use in expressions)

replaceWithMapping

public ParallelLongArray replaceWithMapping(BinaryLongOp combiner, ParallelLongArrayWithLongMapping other)

Replaces elements with results of applying op(thisElement, otherElement).

Parameters:: other - the other array; combiner - the combiner

Returns:: this (to simplify use in expressions)

replaceWithMapping

public ParallelLongArray replaceWithMapping(BinaryLongOp combiner, long[] other)

Replaces elements with results of applying op(thisElement, otherElement).

throws:: ArrayIndexOutOfBoundsException if other array has fewer elements than this array

Parameters:: other - the other array; combiner - the combiner

Returns:: this (to simplify use in expressions)

replaceWithValue

public ParallelLongArray replaceWithValue(long value)

Replaces elements with the given value.

Parameters:: value - the value

Returns:: this (to simplify use in expressions)

resizeArray

final void resizeArray(int newCap)

seqIndexOf

final int seqIndexOf(long target)

seqLastIndexOf

final int seqLastIndexOf(long target)

set

public void set(int i, long x)

setLimit

public final void setLimit(int newLimit)

size

public int size()

Returns the effective size of the underlying array. The effective size is the current limit, if used (see setLimit), or the length of the array otherwise.

Returns:: the effective size of array

sort

public ParallelLongArray sort(LongComparator comparator)

Sorts the array. Unlike Arrays.sort, this sort does not guarantee that elements with equal keys maintain their relative position in the array.

Parameters:: comparator - the comparator to use

Returns:: this (to simplify use in expressions)

sort

public ParallelLongArray sort()

Sorts the array, assuming all elements are Comparable. Unlike Arrays.sort, this sort does not guarantee that elements with equal keys maintain their relative position in the array.

throws:: ClassCastException if any element is not Comparable

Returns:: this (to simplify use in expressions)

sum

public long sum()

Returns the sum of elements.

Returns:: the sum of elements

summary

public SummaryStatistics summary(LongComparator comparator)

Returns summary statistics, using the given comparator to locate minimum and maximum elements.

Parameters:: comparator - the comparator to use for locating minimum and maximum elements

Returns:: the summary

summary

public SummaryStatistics summary()

Returns summary statistics, using natural comparator.

Returns:: the summary

toString

public java.lang.String toString()

withBounds

public ParallelLongArrayWithBounds withBounds(int firstIndex, int upperBound)

Returns an operation prefix that causes a method to operate only on the elements of the array between firstIndex (inclusive) and upperBound (exclusive).

Parameters:: firstIndex - the lower bound (inclusive); upperBound - the upper bound (exclusive)

Returns:: operation prefix

withFilter

public ParallelLongArrayWithFilter withFilter(LongPredicate selector)

Returns an operation prefix that causes a method to operate only on the elements of the array for which the given selector returns true.

Parameters:: selector - the selector

Returns:: operation prefix

withFilter

public ParallelLongArrayWithFilter withFilter(BinaryLongPredicate selector, ParallelLongArrayWithLongMapping other)

Returns an operation prefix that causes a method to operate only on elements for which the given binary selector returns true.

Parameters:: selector - the selector

Returns:: operation prefix

withIndexedFilter

public ParallelLongArrayWithFilter withIndexedFilter(IntAndLongPredicate selector)

Returns an operation prefix that causes a method to operate only on elements for which the given indexed selector returns true.

Parameters:: selector - the selector

Returns:: operation prefix

withIndexedMapping

public ParallelLongArrayWithMapping withIndexedMapping(IntAndLongToObject mapper)

Returns an operation prefix that causes a method to operate on mappings of this array using the given mapper that accepts as arguments an element's current index and value, and produces a new value.

Parameters:: mapper - the mapper

Returns:: operation prefix

withIndexedMapping

public ParallelLongArrayWithDoubleMapping withIndexedMapping(IntAndLongToDouble mapper)

Returns an operation prefix that causes a method to operate on mappings of this array using the given mapper that accepts as arguments an element's current index and value, and produces a new value.

Parameters:: mapper - the mapper

Returns:: operation prefix

withIndexedMapping

public ParallelLongArrayWithLongMapping withIndexedMapping(IntAndLongToLong mapper)

Returns an operation prefix that causes a method to operate on mappings of this array using the given mapper that accepts as arguments an element's current index and value, and produces a new value.

Parameters:: mapper - the mapper

Returns:: operation prefix

withMapping

public ParallelLongArrayWithMapping withMapping(LongToObject op)

Returns an operation prefix that causes a method to operate on mapped elements of the array using the given op.

Parameters:: op - the op

Returns:: operation prefix

withMapping

public ParallelLongArrayWithLongMapping withMapping(LongOp op)

Returns an operation prefix that causes a method to operate on mapped elements of the array using the given op.

Parameters:: op - the op

Returns:: operation prefix

withMapping

public ParallelLongArrayWithDoubleMapping withMapping(LongToDouble op)

Returns an operation prefix that causes a method to operate on mapped elements of the array using the given op.

Parameters:: op - the op

Returns:: operation prefix