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标题: 关于换行 [打印本页]

作者: wutuobangduan 时间: 2014-02-24 08:54
标题: 关于换行

只有\n和\en不同，使用\n时每隔一秒输出，而且结果换行了，使用\en时，不仅没有换行，而且是隔了10秒后，所有结果一起输出。
新手求解疑。

作者: yestreenstars 时间: 2014-02-24 09:20
我在我这里测试，两个都是10s后才输出，一个有换行，一个没有~

作者: wutuobangduan 时间: 2014-02-24 09:24
回复 2# yestreenstars

作者: jason680 时间: 2014-02-24 10:25
回复 1#wutuobangduan

easy solution:
$| = 1;

-----------------------------------

http://blog.csdn.net/BeTalker/article/details/8362730
...
在背后捣鬼的就是IO 缓冲。默认情况下，Perl的STDOUT是有缓冲的
...

-----------------------------------

$ perldoc perlvar
NAME
perlvar - Perl predefined variables
...

HANDLE->autoflush( EXPR )
$OUTPUT_AUTOFLUSH
$|    If set to nonzero, forces a flush right away and after every write
         or print on the currently selected output channel. Default is 0
         (regardless of whether the channel is really buffered by the
         system or not; $| tells you only whether you've asked Perl
         explicitly to flush after each write). STDOUT will typically be
         line buffered if output is to the terminal and block buffered
         otherwise. Setting this variable is useful primarily when you are
         outputting to a pipe or socket, such as when you are running a
         Perl program under rsh and want to see the output as it's
         happening. This has no effect on input buffering. See "getc" in
         perlfunc for that. See "select" in perlfunc on how to select the
         output channel. See also IO::Handle.

         Mnemonic: when you want your pipes to be piping hot.

作者: wutuobangduan 时间: 2014-02-24 10:35
回复 4# jason680

非常感谢，很详细。

作者: pitonas 时间: 2014-02-24 13:49
{:2_172:} 啊!! 好厉害!!感激!!

jason680 发表于 2014-02-24 03:25
回复 1#wutuobangduan

easy solution:
$| = 1;

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