无法使用sed正则表达式删除空行 [英] Can't remove empty lines with sed regex

问题描述

我有一个像这样的文件:

I have a file like this:

2733617     3.00    3   3

2733617 E1b1    8.00    8   16
2733617 E1b1b1b 2.00    2   4

2733617 I1  294.00  296 590
2733617 I2  1.00    1   2

2733617 I2a1    2.00    2   4

sed '/^$/d'对我不起作用. Outfile看起来就像infile.它应该删除空行.

sed '/^$/d' does not work for me. Outfile looks just like infile. It should remove empty lines.

推荐答案

不幸的是，该手册说使用[!-~]之类的范围并不安全.但是，仅使用:print:打印包含可打印字符的行最终对我有用:

Unfortunately the manual says that using ranges like [!-~] is not safe. However, just printing the lines that containing printable characters using :print: worked for me in the end:

sed -n '/[[:print:]]/p'

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