com.carrotsearch.hppc

Class DoubleIntScatterMap

java.lang.Object

com.carrotsearch.hppc.DoubleIntHashMap

com.carrotsearch.hppc.DoubleIntScatterMap

All Implemented Interfaces:

DoubleIntAssociativeContainer, DoubleIntMap, Preallocable, java.lang.Cloneable, java.lang.Iterable<DoubleIntCursor>

@Generated(date="2017-10-22T12:19:55+0200",
           value="KTypeVTypeScatterMap.java")
public class DoubleIntScatterMap
extends DoubleIntHashMap

Same as DoubleIntHashMap 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.DoubleIntHashMap

DoubleIntHashMap.KeysContainer

Field Summary

Fields inherited from class com.carrotsearch.hppc.DoubleIntHashMap

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

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
static DoubleIntScatterMap	from(double[] keys, int[] 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.DoubleIntHashMap

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

DoubleIntScatterMap

public DoubleIntScatterMap()

New instance with sane defaults.

DoubleIntScatterMap

public DoubleIntScatterMap(int expectedElements)

New instance with sane defaults.

DoubleIntScatterMap

public DoubleIntScatterMap(int expectedElements,
                   double loadFactor)

New instance with sane defaults.

Method Detail

hashKey

protected int hashKey(double key)

Description copied from class: DoubleIntHashMap

Returns a hash code for the given key.

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

from

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

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