Notepad ++如何删除没有2个空格字符的行

Question

I can remove line without 1 space character with notepad++

^[^ ]*$

How to remove line without 2 space character.

Answer 1

I guess, maybe you want to remove lines with 1 space and 3 or more, maybe then

^ {1}$|^ {3,}$

might be OK to look into.

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Answer 2

To match a line that does not contain 2 spaces, you could use a negative lookahead asserting not 2 times a space using \S* to match zero or more times a non whitespace char.

^(?!\S* \S* \S*$).+$

• ^ Start of string
• (?! Negative lookahead, assert what is on the right is not
  • \S* \S* \S*$ Match 2 spaces between 0+ non whitespace chars \S*
• ) Close lookahead
• .+ Match any char 0+ times except a newline
• $ End of string

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