bool get_dir(const std::string& path, std::vector< std::string >& result, bool include_dot_names= false );
std::vector< std::string > get_dir(const std::string& path, bool include_dot_names= false );
-int get_dir_size(const std::string& path, bool include_dot_names= false );
+int get_dir_count(const std::string& path, bool include_dot_names= false );
bool unlink(const std::string& path);