如何在模式前插入换行符? [英] How to insert a newline in front of a pattern?

问题描述

如何在一行内的模式前插入换行符?

How to insert a newline before a pattern within a line?

例如，这将在正则表达式模式后面插入一个换行符.

For example, this will insert a newline behind the regex pattern.

sed 's/regex/&\n/g'

我怎样才能做同样的事情，但在模式前面?

How can I do the same but in front of the pattern?

鉴于此示例输入文件，要匹配的模式是电话号码.

Given this sample input file, the pattern to match on is the phone number.

some text [phone]

应该变成

some text
[phone]

推荐答案

其他一些答案不适用于我的 sed 版本.切换 & 和 \n 的位置确实有效.

Some of the other answers didn't work for my version of sed. Switching the position of & and \n did work.

sed 's/regexp/\n&/g' 

这似乎不适用于 OS X，除非您安装 gnu-sed.

This doesn't seem to work on OS X, unless you install gnu-sed.

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