CODEWITHSUNDEEP
c#.netregex
Deadzone
Deadzone

Reputation: 814

Find closest parentheses to string using Regex

I have the following string {[ab]} {[c] } { [d] } {[f]} { = [abc] qwqw = =qwwq= =wq }, I'm trying to extract a group by using a specific string which is inside one of the parentheses, e.g:

ab -> {[ab]}

d -> { [d] }

abc -> { = [abc] qwqw = =qwwq= =wq }

Once I get the result I want to replace it with something else.

I've attempted several different regex patterns:

\{(.*?\[(?:abc)\].*?)\}
([^}][{].*?\[(?:abc)\].*?[}])
({+?(?<=)\[(?:abc)\].*?[}])
^(?:.*)({.*?\[(?:abc)\].*?[}])

But none of them work properly. They either match too much of the string or too little of the string.

Upvotes: 0

Views: 183

Answers (1)

The fourth bird
The fourth bird

Reputation: 163277

This part (?:abc) will match a string abc and does not need the non capturing group. That will not match a single a or ab etc.

One option could be use a capturing group and a character class repeating 1 or more times any of the listed [abcd]+ which might also be aaa if that is ok.

\{[^{}]*\[([abcd]+)\][^{}]*\}

In parts

  • \{ Match {
  • [^{}]* Match 0+ times not { or }
  • \[ Match [
  • ([abcd]+) Capture group 1, match 1+ times any of the listed
  • \] Match ]
  • [^{}]* Match 0+ times not { or }
  • \} Match }

See a Regex demo

If you only want to match abc ab c or d you could also use an alternation matching ab with an optional c, or c or d

\{[^{}]*\[(abc?|c|d)\][^{}]*\}

Regex demo

Upvotes: 1

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