使用某些标签在Notepad ++中合并正则表达式行

Question

I would like to know how I can merge lines within Notepad++ using regex , with certain tags that start with the character. For example:

1|AAA
BBB
CCC
6|DDD
1|EEE
FFF
6|GGG
1|HHH
UUU
III
6|OOO

The expected result:

1|AAABBBCCC6|DDD
1|EEEFFF6|GGG
1|HHHUUUIII6|OOO

The new records start with 1| line and end with 6| line. Thanks

Answer 1

\r\n(?=(?:(?!1\|)[\s\S])*?6\|)

You can this and replace by empty string .See demo.

https://regex101.com/r/vP2zF2/3

Answer 2

You could just use this:

\s(?=[^1])

Regex Demo Here

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Also tested in Notepad++