NnetChainExampleStructureHasher Struct Reference

This hashing object hashes just the structural aspects of the NnetExample without looking at the value of the features. More...

#include <nnet-chain-example.h>

Public Member Functions
size_t	operator() (const NnetChainExample &eg) const noexcept
size_t	operator() (const NnetChainExample *eg) const noexcept

Detailed Description

This hashing object hashes just the structural aspects of the NnetExample without looking at the value of the features.

It will be used in combining egs into batches of all similar structure.

Definition at line 141 of file nnet-chain-example.h.

Member Function Documentation

operator()() [1/2]

size_t operator() ( const NnetChainExample &  eg ) const

noexcept

Definition at line 400 of file nnet-chain-example.cc.

References rnnlm::i, NnetChainSupervision::indexes, and NnetChainSupervision::name.

                                               {
  // these numbers were chosen at random from a list of primes.
  NnetIoStructureHasher io_hasher;
  size_t size = eg.inputs.size(), ans = size * 35099;
  for (size_t i = 0; i < size; i++)
    ans = ans * 19157 + io_hasher(eg.inputs[i]);
  for (size_t i = 0; i < eg.outputs.size(); i++) {
    const NnetChainSupervision &sup = eg.outputs[i];
    StringHasher string_hasher;
    IndexVectorHasher indexes_hasher;
    ans = ans * 17957 +
        string_hasher(sup.name) + indexes_hasher(sup.indexes);
  }
  return ans;
}

operator()() [2/2]

size_t operator() ( const NnetChainExample *  eg ) const

inlinenoexcept

Definition at line 144 of file nnet-chain-example.h.

                                                                 {
    return (*this)(*eg);
  }

---

The documentation for this struct was generated from the following files:

• nnet3/nnet-chain-example.h
• nnet3/nnet-chain-example.cc