@brief Returns a pointer to the specified matrix row. The methods return `uchar*` or typed pointer to the specified matrix row. See the sampl

从文件读取起点时间： 第1行 base64 -> 异或后字节 -> 再异或还原出真正 timeStr 第2行 hashHex -> 和我们现算的哈希做对比

! Call operator for each elements in this row.

! Call operator for each elements in this row. 2d mat special version.

* Returns size of index. */

@brief Copy constructor */

@brief Copy constructor */

从字符串恢复成 QDateTime

@brief Train the forest using one sample set for every tree. * Please, consider using the next method instead of this one for better quality. */

Reduce **/

Mask **/

Some frequent operations **/

* Returns the length of an index feature. */

Meta combinator: return a new GMatDesc with specified data depth. (all other fields are taken unchanged from this GMatDesc)

@brief Zero constant */

Returns the allocator associated with the stream.