com.carrotsearch.hppc

Class IntDoubleScatterMap

java.lang.Object

com.carrotsearch.hppc.IntDoubleHashMap

com.carrotsearch.hppc.IntDoubleScatterMap

All Implemented Interfaces:

IntDoubleAssociativeContainer, IntDoubleMap, Preallocable, java.lang.Cloneable, java.lang.Iterable<IntDoubleCursor>

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

Same as IntDoubleHashMap 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.IntDoubleHashMap

IntDoubleHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.IntDoubleHashMap

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

Constructor Summary

Constructors

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

Method Summary

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

Methods inherited from class com.carrotsearch.hppc.IntDoubleHashMap

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

IntDoubleScatterMap

public IntDoubleScatterMap()

New instance with sane defaults.

IntDoubleScatterMap

public IntDoubleScatterMap(int expectedElements)

New instance with sane defaults.

IntDoubleScatterMap

public IntDoubleScatterMap(int expectedElements,
                           double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(int key)

Description copied from class: IntDoubleHashMap

Returns a hash code for the given key.

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

from

public static IntDoubleScatterMap from(int[] keys,
                                       double[] values)

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