lshkit::Tail< LSH > Class Template Reference

The modulo operation on hash values. More...

#include <composite.h>

List of all members.

Public Types

typedef LSH Super
 The base LSH class.
typedef Super::Domain Domain

Public Member Functions

template<typename RNG>
void reset (const Parameter &param, RNG &rng)
template<typename RNG>
 Tail (const Parameter &param, RNG &rng)
unsigned getRange () const
unsigned operator() (Domain obj) const
template<class Archive>
void serialize (Archive &ar, const unsigned int version)

Protected Attributes

LSH lsh_
unsigned range_


struct  Parameter

Detailed Description

template<typename LSH>
class lshkit::Tail< LSH >

The modulo operation on hash values.

The mod of an LSH function by some value N is usually still locality sensitive. This can be used to limit the hash value of certain LSH, so that the hash value can be used to index a fixed-sized hash table.

Let LSH be the original class, and N be the divisor, then the parameter type is defined as

      struct Parameter {
          unsigned range;     // the divisor.
          ...                 // the original parameters are inherited.
The domain is the same as the original LSH and the range is always N.

The documentation for this class was generated from the following file:
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