Function join

src/api/cpp/data.cpp:224–228

}

array join(const int dim, const array &first, const array &second) {
    af_array out = 0;
    AF_THROW(af_join(&out, dim, first.get(), second.get()));
    return array(out);
}

array join(const int dim, const array &first, const array &second,
           const array &third) {