To identify all patterns that are not preceded by another pattern, you can use a negative lookbehind assertion in your regular expression. The general syntax of a negative lookbehind assertion is:
(?<!pattern)target
Where pattern
is the pattern that should not immediately precede target
. Here's an example:
(?<!pre-)[a-z]+
This regular expression will match any lowercase letters that are not immediately preceded by the string "pre-". For example, it will match "apple" and "banana", but not "pre-orange" or "pre-grape".
You can adjust the regular expression and the negative lookbehind assertion as needed to fit your specific pattern matching requirements.
Asked: 2023-07-01 09:07:17 +0000
Seen: 13 times
Last updated: Jul 01 '23