如何删除“\r\n”，但仅限于我的文本的某些部分？

Question

如何使用正则表达式删除下面文本的 <out>...</out> 块的所有 \r\n 字符（将其转换为仅 1 行）？

<nx1>home</nx1>
<nx2>living</nx2>
<out>text one
text continues
and at last!</out>
<m2>dog</m2>

此文本示例的最终结果应为：

<nx1>home</nx1>
<nx2>living</nx2>
<out>text one text continues and at last!</out>
<m2>dog</m2>

Answer 1

搜索

(?<=<out>(?:(?!</?out>).)*)\r\n(?=(?:(?!</?out>).)*</out>)

并用一个空格替换所有内容。在 EditPad Pro 7.3.1 上测试。确保选择“点”选项，这样点也匹配换行符。

说明：

(?<=               # Look behind to assert that there is...
 <out>             # an <out> tag before the current position,
 (?:(?!</?out>).)* # followed by anything except <out> or </out> tags
)                  # End of lookbehind
\r\n               # Match \r\n
(?=                # Look ahead to assert that there is...
 (?:(?!</?out>).)* # any number of characters ahead (except <out>/</out> tags)
 </out>            # followed by an </out> tag
)                  # End of lookahead