Adding Quantifiers to Lookaround Operators

rich_de_g

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    • December 19, 2014 at 12:12 pm #72311
      rich_de_g
      Member

      Hi,

      I have these two strings, below, and I would like to isolate the text, Daily Returns.

      =[Piedmont daily.xlsx]Daily Returns!$C$15
      =Daily Returns!$C$15

      The expression to isolate the bits before Daily Returns is fairly simple:
      \=(\[?.+\])?

      But if I try to encapsulate this in a positive lookbehind operator, it fails. I’ve tried and tried and, well maybe I’m missing something obvious.

    • December 19, 2014 at 12:33 pm #72313
      Aaron Troia
      Participant

      Lookbehinds cannot be greedy (ie you cant use quantifiers), lookaheads on the other hand can be greedy, but not lookbehinds, but you can use Keep or \K to mimic the positive lookbehind while using quantifiers, try:

      \=(\[?.+\])?\K.+?(?=\!\$C\$\d+)

    • December 19, 2014 at 12:44 pm #72314
      rich_de_g
      Member

      A. A. Ron,

      Thanks, that works great! I’ve never heard of ‘Keep’; I shall have to learn more about it.

      Thanks again,
      Richard

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