我试图为每两行文本插入一个新行,除非我想在遇到新段落(连续两行)时重新启动此模式. (我想要的输出不应该有三个连续的新行.)
例如,这是我的输入文本：
This is my first line to appear in the text. I need the second line to appear in the way that follows the pattern specified. I am not sure if the third line will appear as I want it to appear because sometimes the new line happens where there are two consecutive new lines.
这是我想要的输出：
This is my first line to appear in the text. I need the second line to appear in the way that follows the pattern specified. I am not sure if the third line will appear as I want it to appear because sometimes the new line happens where there are two consecutive new lines.
我试过用awk：
awk -v n=2 '1; NR % n == 0 {print ""}'
但是此命令在新段落后不会重新启动模式.相反,我会从上面的示例文本中获得以下输出：
This is my first line to appear in the text. I need the second line to appear in the way that follows the pattern specified. I am not sure if the third line will appear as I want it to appear because sometimes the new line happens where there are two consecutive new lines.
解决方法
perl中的段落模式可以帮助：
perl -00 -ple 's/.*\n.*\n/$&\n/g'
产量
This is my first line to appear in the text. I need the second line to appear in the way that follows the pattern specified. I am not sure if the third line will appear as I want it to appear because sometimes the new line happens where there are two consecutive new lines.
基于@Borodin评论：
perl -00 -ple 's/(?:.*\n){2}\K/\n/g'
