Regular expression to match a line that doesn’t contain a word

Subash Chandran 12th September 2020 Leave a Comment

^((?!yourstring).)*$

^the beginning of the string, ( group and capture to \1 (0 or more times (matching the most amount possible)),
(?! look ahead to see if there is not, your string,) end of look-ahead, . any character except \n,
)* end of \1 (Note: because you are using a quantifier on this capture, only the LAST repetition of the captured pattern will be stored in \1)
$ before an optional \n, and the end of the string.

Source: StackOverflow

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