Package com.carrotsearch.hppc
Class DoubleDoubleScatterMap
- java.lang.Object
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- com.carrotsearch.hppc.DoubleDoubleHashMap
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- com.carrotsearch.hppc.DoubleDoubleScatterMap
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- All Implemented Interfaces:
DoubleDoubleAssociativeContainer
,DoubleDoubleMap
,Preallocable
,java.lang.Cloneable
,java.lang.Iterable<DoubleDoubleCursor>
@Generated(date="2021-05-28T03:45:42+0000", value="KTypeVTypeScatterMap.java") public class DoubleDoubleScatterMap extends DoubleDoubleHashMap
Same asDoubleDoubleHashMap
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.
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Nested Class Summary
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Nested classes/interfaces inherited from class com.carrotsearch.hppc.DoubleDoubleHashMap
DoubleDoubleHashMap.KeysContainer
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Field Summary
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Fields inherited from class com.carrotsearch.hppc.DoubleDoubleHashMap
assigned, hasEmptyKey, keyMixer, keys, loadFactor, mask, orderMixer, resizeAt, values
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Constructor Summary
Constructors Constructor Description DoubleDoubleScatterMap()
New instance with sane defaults.DoubleDoubleScatterMap(int expectedElements)
New instance with sane defaults.DoubleDoubleScatterMap(int expectedElements, double loadFactor)
New instance with sane defaults.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static DoubleDoubleScatterMap
from(double[] keys, double[] 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.DoubleDoubleHashMap
addTo, allocateBuffers, allocateThenInsertThenRehash, clear, clone, containsKey, ensureCapacity, equalElements, equals, 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
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Constructor Detail
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DoubleDoubleScatterMap
public DoubleDoubleScatterMap()
New instance with sane defaults.
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DoubleDoubleScatterMap
public DoubleDoubleScatterMap(int expectedElements)
New instance with sane defaults.
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DoubleDoubleScatterMap
public DoubleDoubleScatterMap(int expectedElements, double loadFactor)
New instance with sane defaults.
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Method Detail
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hashKey
protected int hashKey(double key)
Description copied from class:DoubleDoubleHashMap
Returns a hash code for the given key.The default implementation mixes the hash of the key with
DoubleDoubleHashMap.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 classDoubleDoubleHashMap
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from
public static DoubleDoubleScatterMap from(double[] keys, double[] values)
Creates a hash map from two index-aligned arrays of key-value pairs.
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