如何在逗号后插入换行符`),(` sed? [英] How to insert newline character after comma in `),(` with sed?

问题描述

如何在 ),( 中用 sed 在逗号后插入换行符?

How to insert newline character after comma in ),( with sed?

$ more temp.txt
(foo),(bar)
(foobar),(foofoobar)

$ sed 's/),(/),\n(/g' temp.txt 
(foo),n(bar)
(foobar),n(foofoobar)

为什么这不起作用?

推荐答案

好吧，我知道这个问题很老了，但我不得不涉足这个问题以使 sed 接受 \n 字符.我找到了一个适用于 bash 的解决方案，我在此为遇到相同问题的其他人指出.

OK, I know this question is old but I just had to wade trough this to make sed accept a \n character. I found a solution that works in bash and I am noting it here for others who run into the same problem.

重申问题:让 sed 接受反斜杠转义换行符(或其他反斜杠转义字符).

To restate the problem: Get sed to accept the backslash escaped newline (or other backslash escaped characters for that matter).

bash 中的解决方法是使用:

The workaround in bash is to use:

$'\n'

在 bash 中，$'\n' 字符串被替换为真正的换行符.

In bash a $'\n' string is replaced with a real newline.

您唯一需要做的另一件事是对 \n 进行双重转义，因为您必须对斜杠本身进行转义.

The only other thing you need to do is double escape the \n as you have to escape the slash itself.

综合起来:

sed $'s/),(/),\\\n(/g' temp.txt
(foo),
(bar)
(foobar),
(foofoobar)

如果您希望它实际更改而不是打印出来，请使用 -i

If you want it actually changed instead of being printed out use the -i

sed -i $'s/),(/),\\\n(/g' temp.txt

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