utf8Stream.flush(callback)

• callback <Function>

  • err <Error> | <null> 如果刷新失败，则返回错误，否则返回 null。

    ¥err <Error> | <null> An error if the flush failed, otherwise null.

如果写入操作未进行，则将当前缓冲区写入文件。如果 minLength 为零或已在写入，则不执行任何操作。

¥Writes the current buffer to the file if a write was not in progress. Do nothing if minLength is zero or if it is already writing.