CODEWITHSUNDEEP
regexpattern-matching
user4676463
user4676463

Reputation:

Regex to filter numbers after a text

Can you help me with this example please:

BUILTIN\s+\d{1,2}

https://regex101.com/r/w7A3H7/1

I only want to filter out the numbers after text BUILTIN and before the x character. Now the result also contains the word BUILTIN, what I want to be removed.

I also can't simply use \d{1,2}x because I must make sure it is after the second occurance of the word BUILTIN. Thank you

Upvotes: 0

Views: 121

Answers (1)

Paolo
Paolo

Reputation: 26014

You can use the following pattern:

BUILTIN\s+\K\d+(?=x)
  • BUILTIN Literal substring.
  • \s+ Match whitespace, one or more occurrences.
  • \K Reset operator which resets the match.
  • \d+ Match digits.
  • (?=x) Positive lookahead which ensures that after the digits a x is present.

You can try it here:

If you are working with a regex flavor which does not support the reset operator, you can use:

(?<=BUILTIN\s{11})\d+(?=x)
  • (?<=BUILTIN\s{11}) Lookbehind for literal substring followed by 11 whitespaces.
  • \d+ Match digits.
  • (?=x) Positive lookahead which ensures that after the digits a x is present.

You can try it here

Match 1
Full match  57-59   `48`
Match 2
Full match  137-138 `4`
Match 3
Full match  283-285 `24`
Match 4
Full match  363-365 `48`

Upvotes: 1

Related Questions