com.carrotsearch.hppc

Class ShortShortScatterMap

java.lang.Object

com.carrotsearch.hppc.ShortShortHashMap

com.carrotsearch.hppc.ShortShortScatterMap

All Implemented Interfaces:

Preallocable, ShortShortAssociativeContainer, ShortShortMap, java.lang.Cloneable, java.lang.Iterable<ShortShortCursor>

@Generated(date="2017-10-22T12:31:12+0200",
           value="KTypeVTypeScatterMap.java")
public class ShortShortScatterMap
extends ShortShortHashMap

Same as ShortShortHashMap 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.ShortShortHashMap

ShortShortHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.ShortShortHashMap

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

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
static ShortShortScatterMap	from(short[] keys, short[] 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.ShortShortHashMap

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

Constructor Detail

ShortShortScatterMap

public ShortShortScatterMap()

New instance with sane defaults.

ShortShortScatterMap

public ShortShortScatterMap(int expectedElements)

New instance with sane defaults.

ShortShortScatterMap

public ShortShortScatterMap(int expectedElements,
                    double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(short key)

Description copied from class: ShortShortHashMap

Returns a hash code for the given key.

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

from

public static ShortShortScatterMap from(short[] keys,
                        short[] values)

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