com.carrotsearch.hppc

Class DoubleShortScatterMap

java.lang.Object

com.carrotsearch.hppc.DoubleShortHashMap

com.carrotsearch.hppc.DoubleShortScatterMap

All Implemented Interfaces:

DoubleShortAssociativeContainer, DoubleShortMap, Preallocable, java.lang.Cloneable, java.lang.Iterable<DoubleShortCursor>

@Generated(date="2015-05-07T09:33:04+0200",
           value="KTypeVTypeScatterMap.java")
public class DoubleShortScatterMap
extends DoubleShortHashMap

Same as DoubleShortHashMap 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.DoubleShortHashMap

DoubleShortHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.DoubleShortHashMap

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

Constructor Summary

Constructors

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

Method Summary

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

Methods inherited from class com.carrotsearch.hppc.DoubleShortHashMap

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

DoubleShortScatterMap

public DoubleShortScatterMap()

New instance with sane defaults.

DoubleShortScatterMap

public DoubleShortScatterMap(int expectedElements)

New instance with sane defaults.

DoubleShortScatterMap

public DoubleShortScatterMap(int expectedElements,
                             double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(double key)

Description copied from class: DoubleShortHashMap

Returns a hash code for the given key.

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

from

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

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