com.carrotsearch.hppc

Class ShortDoubleScatterMap

java.lang.Object

com.carrotsearch.hppc.ShortDoubleHashMap

com.carrotsearch.hppc.ShortDoubleScatterMap

All Implemented Interfaces:

Preallocable, ShortDoubleAssociativeContainer, ShortDoubleMap, java.lang.Cloneable, java.lang.Iterable<ShortDoubleCursor>

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

Same as ShortDoubleHashMap 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.ShortDoubleHashMap

ShortDoubleHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.ShortDoubleHashMap

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

Constructor Summary

Constructors

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

Method Summary

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

Methods inherited from class com.carrotsearch.hppc.ShortDoubleHashMap

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

ShortDoubleScatterMap

public ShortDoubleScatterMap()

New instance with sane defaults.

ShortDoubleScatterMap

public ShortDoubleScatterMap(int expectedElements)

New instance with sane defaults.

ShortDoubleScatterMap

public ShortDoubleScatterMap(int expectedElements,
                             double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(short key)

Description copied from class: ShortDoubleHashMap

Returns a hash code for the given key.

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

from

public static ShortDoubleScatterMap from(short[] keys,
                                         double[] values)

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