Class DoubleCharScatterMap

java.lang.Object
com.carrotsearch.hppc.DoubleCharHashMap
com.carrotsearch.hppc.DoubleCharScatterMap
All Implemented Interfaces:
DoubleCharAssociativeContainer, DoubleCharMap, Preallocable, Cloneable, Iterable<DoubleCharCursor>

@Generated(date="2023-10-26T04:33:09+0000", value="KTypeVTypeScatterMap.java") public class DoubleCharScatterMap extends DoubleCharHashMap
Same as DoubleCharHashMap 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.

  • Constructor Details

    • DoubleCharScatterMap

      public DoubleCharScatterMap()
      New instance with sane defaults.
    • DoubleCharScatterMap

      public DoubleCharScatterMap(int expectedElements)
      New instance with sane defaults.
    • DoubleCharScatterMap

      public DoubleCharScatterMap(int expectedElements, double loadFactor)
      New instance with sane defaults.
  • Method Details

    • hashKey

      protected int hashKey(double key)
      Description copied from class: DoubleCharHashMap
      Returns a hash code for the given key.

      The default implementation mixes the hash of the key with DoubleCharHashMap.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 DoubleCharHashMap
    • from

      public static DoubleCharScatterMap from(double[] keys, char[] values)
      Creates a hash map from two index-aligned arrays of key-value pairs.