NnetIoStructureHasher Struct Reference

This hashing object hashes just the structural aspects of the NnetIo object (name, indexes, feature dimension) without looking at the value of features. More...

#include <nnet-example.h>

Public Member Functions
size_t	operator() (const NnetIo &a) const noexcept

Detailed Description

This hashing object hashes just the structural aspects of the NnetIo object (name, indexes, feature dimension) without looking at the value of features.

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

Definition at line 94 of file nnet-example.h.

Member Function Documentation

operator()()

size_t operator() ( const NnetIo &  a ) const

noexcept

Definition at line 139 of file nnet-example.cc.

                                     {
  StringHasher string_hasher;
  IndexVectorHasher indexes_hasher;

  // numbers appearing here were taken at random from a list of primes.
  size_t ans = string_hasher(io.name) +
      indexes_hasher(io.indexes) +
      19249  * io.features.NumRows() +
      14731 * io.features.NumCols();
  return ans;
}

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

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