CODEWITHSUNDEEP
regex
최진용
최진용

Reputation: 43

Only one group capture several times

String:

50-60*70/50+(1+7-(9+51))+5*9/10

Want:

9 +51

Tried:

(?:\(|\G[\+\*\/-])\K(\d+)

Result:

1 7 9 51

Upvotes: 3

Views: 87

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626729

It seems you are using a PCRE regex to get the numbers that can be preceded with math operators inside (...) that has no inner ().

Use

(?:\(|(?!^)\G)\K[+*\/-]?\d+(?=[^()]*\))

See regex demo

Explanation:

  • (?:\(|(?!^)\G)\K - Find ( or the end of the previous successful match, and omit the match text currently stored in the memory (with \K)
  • [+*\/-]? - one or zero operators
  • \d+ - one or more digits
  • (?=[^()]*\)) - but only if followed by zero or more characters other than ( and ) up to the closing ).

Note that in your regex, you omit the math operators since they are before \K and you find the numbers after the math operators or ( (and after the end of each successful match, that is why you get 1, 7, 9, 51.

Upvotes: 1

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