Function countByKey

src/api/cpp/reduce.cpp:157–164

}

void countByKey(array &keys_out, array &vals_out, const array &keys,
                const array &vals, const int dim) {
    af_array okeys, ovals;
    AF_THROW(af_count_by_key(&okeys, &ovals, keys.get(), vals.get(),
                             getFNSD(dim, vals.dims())));
    keys_out = array(okeys);
    vals_out = array(ovals);
}

void min(array &val, array &idx, const array &in, const int dim) {
    af_array out = 0;