Method MatrixValarray

examples/matrix/main.cpp:39–44

public:
    MatrixValarray()
    {
        for (auto &v : data) {
            v.resize(N);
        }
    }
    std::valarray<T> &operator[](std::size_t i) { return data[i]; }
    const std::valarray<T> &operator[](std::size_t i) const { return data[i]; }
};