swap

    template <typename T1, typename ftor1>
    void swap(partitioned_vector<T1, ftor1>& other) {
        std::vector<T1> bazinga;
        bazinga.insert( bazinga.end(), other.t.begin(), other.t.end() );
        bazinga.insert( bazinga.end(), other.f.begin(), other.f.end() );

        other.f.clear();
        other.t.clear();
        for (auto e : t) {
            other.insert(e);
        }
        for (auto e : f) {
            other.insert(e);
        }

        f.clear();
        t.clear();
        for (auto e : bazinga) {
            insert(e);
        }
    }