Method clear

dlib-19.21/dlib/array2d/array2d_kernel.h:238–251

        }

        void clear (
        )
        {
            if (data != 0)
            {
                pool.deallocate_array(data);
                nc_ = 0;
                nr_ = 0;
                data = 0;
                at_start_ = true;
                cur = 0;
                last = 0;
            }
        }

        void set_size (
            long rows,