com.carrotsearch.hppc

Class ByteDoubleScatterMap

java.lang.Object

com.carrotsearch.hppc.ByteDoubleHashMap

com.carrotsearch.hppc.ByteDoubleScatterMap

All Implemented Interfaces:

ByteDoubleAssociativeContainer, ByteDoubleMap, Preallocable, java.lang.Cloneable, java.lang.Iterable<ByteDoubleCursor>

@Generated(date="2016-10-25T13:31:57+0200",
           value="KTypeVTypeScatterMap.java")
public class ByteDoubleScatterMap
extends ByteDoubleHashMap

Same as ByteDoubleHashMap 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.ByteDoubleHashMap

ByteDoubleHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.ByteDoubleHashMap

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

Constructor Summary

Constructors

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

Method Summary

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

Methods inherited from class com.carrotsearch.hppc.ByteDoubleHashMap

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

ByteDoubleScatterMap

public ByteDoubleScatterMap()

New instance with sane defaults.

ByteDoubleScatterMap

public ByteDoubleScatterMap(int expectedElements)

New instance with sane defaults.

ByteDoubleScatterMap

public ByteDoubleScatterMap(int expectedElements,
                            double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(byte key)

Description copied from class: ByteDoubleHashMap

Returns a hash code for the given key.

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

from

public static ByteDoubleScatterMap from(byte[] keys,
                                        double[] values)

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