CODEWITHSUNDEEP
regexregex-lookaroundsregex-negation
julien nascimento
julien nascimento

Reputation: 150

Negative Lookahead Regex is ignoring my sentence

I'm trying to get N group in the following text using this Regex N+(?!\d+N)

20NNN (Expected Result: NN)
2NNN  (Expected Result: NN)
2000NNNN (Expected Result: NNN)

When I execute the code, the Regex fails.

PS: The N group after number+N could be any quantity.

Thanks in advance

Upvotes: 1

Views: 24

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626896

The N+(?!\d+N) pattern matches an N char, one or more occurrences, that is not immediately followed with 1+ digits and N.

You may use

(?<=\dN)N+

See the regex demo

Details

  • (?<=\dN) - a location immediately preceded with any digit and N
  • N+ - one or more N chars.

Upvotes: 1

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