org.beryx.streamplify.derangement

Class LongDerangements

java.lang.Object

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

org.beryx.streamplify.derangement.LongDerangements

All Implemented Interfaces:

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

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

Provides streams of derangements.
Can be used for derangements with a maximum length of 21. For bigger values, a BigIntegerDerangements 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

Modifier and Type	Field and Description
static int	MAX_LENGTH

Fields inherited from interface java.util.Spliterator

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

Constructor Summary

Constructors

Constructor and Description
LongDerangements(int length) Constructs derangements of length elements

Method Summary

Modifier and Type	Method and Description
static long	subfactorial(int n)

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

Field Detail

MAX_LENGTH

public static final int MAX_LENGTH

See Also:

Constant Field Values

Constructor Detail

LongDerangements

public LongDerangements(int length)

Constructs derangements of length elements

Method Detail

subfactorial

public static long subfactorial(int n)

Throws:

java.lang.IllegalArgumentException - if n is negative or the result does not fit in a long (that is, n > 21)