double _eIntersect(BloomFilter &b)
{
double dot = 0;
//cout << fsize << "==" << filter.size() << endl;
for (size_t i =0; i < fsize; i++)
if (filter[i] == 1 || b.filter[i] == 1)
dot ++;
double union_size = _eUnion(b);
double e = _esize() + b._esize() - union_size;
return e;
}
