org.beryx.streamplify.combination

Class LongCombinations

java.lang.Object

org.beryx.streamplify.LongIndexedSpliterator<int[],LongCombinations>

org.beryx.streamplify.combination.LongCombinations

All Implemented Interfaces:

java.util.Spliterator<int[]>, Streamable<int[],LongCombinations>

public class LongCombinations
extends LongIndexedSpliterator<int[],LongCombinations>

Provides streams of combinations.
Can be used when the binomial coefficient (n choose k) is a number that can fit in a long. For bigger values, a BigIntegerCombinations is needed.

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Spliterator

java.util.Spliterator.OfDouble, java.util.Spliterator.OfInt, java.util.Spliterator.OfLong, java.util.Spliterator.OfPrimitive<T,T_CONS,T_SPLITR extends java.util.Spliterator.OfPrimitive<T,T_CONS,T_SPLITR>>

Field Summary

Fields inherited from interface java.util.Spliterator

CONCURRENT, DISTINCT, IMMUTABLE, NONNULL, ORDERED, SIZED, SORTED, SUBSIZED

Constructor Summary

Constructors

Constructor and Description
LongCombinations(int n, int k) k-combinations from a set of n elements

Method Summary

Modifier and Type	Method and Description
protected static long	count(int n, int k)

Methods inherited from class org.beryx.streamplify.LongIndexedSpliterator

bigCount, characteristics, count, estimateSize, forEachRemaining, getFence, getIndex, parallelStream, shuffle, skip, skip, stream, tryAdvance, trySplit, withAdditionalCharacteristics, withShuffler, withValueSupplier

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Spliterator

getComparator, getExactSizeIfKnown, hasCharacteristics

Methods inherited from interface org.beryx.streamplify.Streamable

ordered, shuffle

Constructor Detail

LongCombinations

public LongCombinations(int n,
                        int k)

k-combinations from a set of n elements

Method Detail

count

protected static long count(int n,
                            int k)