Method add

deps/opencv/modules/core/src/algorithm.cpp:58–66

    const _ValueTp& operator [](size_t idx) const { return vec[idx]; }

    void add(const _KeyTp& k, const _ValueTp& val)
    {
        pair<_KeyTp, _ValueTp> p(k, val);
        vec.push_back(p);
        size_t i = vec.size()-1;
        for( ; i > 0 && vec[i].first < vec[i-1].first; i-- )
            std::swap(vec[i-1], vec[i]);
        CV_Assert( i == 0 || vec[i].first != vec[i-1].first );
    }

    bool find(const _KeyTp& key, _ValueTp& value) const
    {