com.carrotsearch.hppc

Class DoubleScatterSet

java.lang.Object

com.carrotsearch.hppc.AbstractDoubleCollection

com.carrotsearch.hppc.DoubleHashSet

com.carrotsearch.hppc.DoubleScatterSet

All Implemented Interfaces:

DoubleCollection, DoubleContainer, DoubleLookupContainer, DoubleSet, Preallocable, java.lang.Cloneable, java.lang.Iterable<DoubleCursor>

@Generated(date="2023-04-24T17:14:46+0800",
           value="KTypeScatterSet.java")
public class DoubleScatterSet
extends DoubleHashSet

Same as DoubleHashSet but does not implement per-instance key mixing strategy and uses a simpler (faster) bit distribution function.

Note: read about important differences between hash and scatter sets.

See Also:

DoubleHashSet, HPPC interfaces diagram

Nested Class Summary

Nested classes/interfaces inherited from class com.carrotsearch.hppc.DoubleHashSet

DoubleHashSet.EntryIterator

Field Summary

Fields inherited from class com.carrotsearch.hppc.DoubleHashSet

assigned, hasEmptyKey, keyMixer, keys, loadFactor, mask, orderMixer, resizeAt

Constructor Summary

Constructors

Constructor and Description
DoubleScatterSet() New instance with sane defaults.
DoubleScatterSet(int expectedElements) New instance with sane defaults.
DoubleScatterSet(int expectedElements, double loadFactor) New instance with sane defaults.

Method Summary

Modifier and Type	Method and Description
static DoubleScatterSet	from(double... elements) Create a set from a variable number of arguments or an array of double.
protected int	hashKey(double key) Returns a hash code for the given key.

Methods inherited from class com.carrotsearch.hppc.DoubleHashSet

add, addAll, addAll, addAll, allocateBuffers, allocateThenInsertThenRehash, clear, clone, contains, ensureCapacity, equals, forEach, forEach, hashCode, indexExists, indexGet, indexInsert, indexOf, indexReplace, isEmpty, iterator, rehash, release, remove, removeAll, removeAll, shiftConflictingKeys, size, toArray, verifyLoadFactor, visualizeKeyDistribution

Methods inherited from class com.carrotsearch.hppc.AbstractDoubleCollection

removeAll, retainAll, retainAll, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.carrotsearch.hppc.DoubleCollection

removeAll, retainAll, retainAll

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

DoubleScatterSet

public DoubleScatterSet()

New instance with sane defaults.

DoubleScatterSet

public DoubleScatterSet(int expectedElements)

New instance with sane defaults.

DoubleScatterSet

public DoubleScatterSet(int expectedElements,
                        double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(double key)

Description copied from class: DoubleHashSet

Returns a hash code for the given key. The default implementation mixes the hash of the key with DoubleHashSet.keyMixer to differentiate hash order of keys between hash containers. Helps alleviate problems resulting from linear conflict resolution in open addressing. The output from this function should evenly distribute keys across the entire integer range.

Overrides:

hashKey in class DoubleHashSet

from

public static DoubleScatterSet from(double... elements)

Create a set from a variable number of arguments or an array of double. The elements are copied from the argument to the internal buffer.