如何编写 RegEx 以插入行长度超过 30 个字符的换行符 [英] How to write RegEx for inserting line break for line length more than 30 characters

问题描述

我正在使用文本编辑器，它让我可以使用正则表达式来查找/替换文本.我有一个大文本文件，想在超过 30 个字符的行中插入一个新行.我希望该行在第 30 个字符后断开，并且单词或短语是否断开都没有关系.

I am using a text editor which lets me use regular expressions to find/replace text. I have a large text file and want to insert a new line in lines which are more than 30 characters. I want the line to break after the 30th character and it doesn't matter if a word or phrase breaks or not.

原文:

Hi this is a sample text.
this is a line.
This is a very very very very very long line.
This is a regular line.
....

修改后的文字:

Hi this is a sample text.
this is a line.
This is one very very very ver
y very long line.
This is a regular line.
....

如何编写正则表达式:

1. 查找超过 30 个字符的行.
2. 在长度超过 30 个字符的行中的第 30 个字符之后插入一个新行.

推荐答案

查找内容:

^(.{30})

替换为:

\1\n

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