org.beryx.streamplify.derangement

Class BigIntegerDerangements

java.lang.Object

org.beryx.streamplify.BigIntegerIndexedSpliterator<int[],BigIntegerDerangements>

org.beryx.streamplify.derangement.BigIntegerDerangements

All Implemented Interfaces:

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

public class BigIntegerDerangements
extends BigIntegerIndexedSpliterator<int[],BigIntegerDerangements>

Provides streams of derangements.
For derangements with a length <= 21, you may consider using the more efficient LongDerangements.

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
BigIntegerDerangements(int length) Constructs derangements of length elements

Method Summary

Modifier and Type	Method and Description
static java.math.BigInteger	subfactorial(int n)

Methods inherited from class org.beryx.streamplify.BigIntegerIndexedSpliterator

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

BigIntegerDerangements

public BigIntegerDerangements(int length)

Constructs derangements of length elements

Method Detail

subfactorial

public static java.math.BigInteger subfactorial(int n)

Throws:

java.lang.IllegalArgumentException - if n is negative or too big (> 20000)