com.carrotsearch.hppc

Class LongDoubleScatterMap

java.lang.Object

com.carrotsearch.hppc.LongDoubleHashMap

com.carrotsearch.hppc.LongDoubleScatterMap

All Implemented Interfaces:

LongDoubleAssociativeContainer, LongDoubleMap, Preallocable, java.lang.Cloneable, java.lang.Iterable<LongDoubleCursor>

@Generated(date="2023-04-24T17:14:49+0800",
           value="KTypeVTypeScatterMap.java")
public class LongDoubleScatterMap
extends LongDoubleHashMap

Same as LongDoubleHashMap 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.

Nested Class Summary

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

LongDoubleHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.LongDoubleHashMap

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
static LongDoubleScatterMap	from(long[] keys, double[] values) Creates a hash map from two index-aligned arrays of key-value pairs.
protected int	hashKey(long key) Returns a hash code for the given key.

Methods inherited from class com.carrotsearch.hppc.LongDoubleHashMap

addTo, allocateBuffers, allocateThenInsertThenRehash, clear, clone, containsKey, ensureCapacity, equalElements, equals, forEach, forEach, get, getOrDefault, hashCode, indexExists, indexGet, indexInsert, indexOf, indexReplace, isEmpty, iterator, keys, put, putAll, putAll, putIfAbsent, putOrAdd, rehash, release, remove, removeAll, removeAll, removeAll, shiftConflictingKeys, size, toString, values, verifyLoadFactor, visualizeKeyDistribution

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

LongDoubleScatterMap

public LongDoubleScatterMap()

New instance with sane defaults.

LongDoubleScatterMap

public LongDoubleScatterMap(int expectedElements)

New instance with sane defaults.

LongDoubleScatterMap

public LongDoubleScatterMap(int expectedElements,
                            double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(long key)

Description copied from class: LongDoubleHashMap

Returns a hash code for the given key.

The default implementation mixes the hash of the key with LongDoubleHashMap.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 LongDoubleHashMap

from

public static LongDoubleScatterMap from(long[] keys,
                                        double[] values)

Creates a hash map from two index-aligned arrays of key-value pairs.