best_constant.h

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#pragma once
#include <float.h>
#include "vw.h"

inline void count_label(shared_data* sd, float l)
{
  if (sd->is_more_than_two_labels_observed || l == FLT_MAX)
    return;

  if (sd->first_observed_label != FLT_MAX)
  {
    if (sd->first_observed_label != l)
    {
      if (sd->second_observed_label != FLT_MAX)
      {
        if (sd->second_observed_label != l)
          sd->is_more_than_two_labels_observed = true;
      }
      else
        sd->second_observed_label = l;
    }
  }
  else
    sd->first_observed_label = l;
}

bool get_best_constant(vw& all, float& best_constant, float& best_constant_loss);