Function count

src/api/cpp/reduce.cpp:151–155

}

array count(const array &in, const int dim) {
    af_array out = 0;
    AF_THROW(af_count(&out, in.get(), getFNSD(dim, in.dims())));
    return array(out);
}

void countByKey(array &keys_out, array &vals_out, const array &keys,
                const array &vals, const int dim) {