Regex in Integromat-CodePudding

I am getting an 'infinite loop' with the below regex expression in the Textparser module in Integromat.

(?<=\n)(.*)(?=\nA|B)

I know it is due to the | , but unsure the other options in Integromat.

CodePudding user response：

Try the pattern like

(?m)^(. ?)(?:\r?\nA|B)

EXPLANATION

m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
^ asserts position at start of a line
1st Capturing Group (. ?)
  . matches any character (except for line terminators)
   ? matches the previous token between one and unlimited times, as few times as possible, expanding as needed (lazy)
Non-capturing group (?:\r?\nA|B)
  1st Alternative \r?\nA
  \r matches a carriage return (ASCII 13)
  ? matches the previous token between zero and one times, as many times as 
possible, giving back as needed (greedy)
  \n matches a line-feed (newline) character (ASCII 10)
A matches the character A with index 6510 (4116 or 1018) literally (case sensitive)
2nd Alternative B
  B matches the character B with index 6610 (4216 or 1028) literally (case sensitive)