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22147Re: [Clip] A little help on look behinds

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  • Alec Burgess
    Oct 6, 2011
      Hi John:
      This appears to work from Replace dialog - or in a clip

      Note - the \K throws away everything before it (ie. beginning of buffer
      thru any length string of characters NOT containing and "[" then
      matches the first [[[[ and remainder up to first linefeed. This gets
      around the normal lookbehind requirement that it be of fixed length.

      Note - another way to do would be match both parts but discard the
      second (replacing both by just the first) (not tested)

      Regards ... Alec (buralex@gmail & WinLiveMess - alec.m.burgess@skype)

      On 2011-10-06 23:01, John Shotsky wrote:
      > I always have trouble making these things work.
      > I enclose groups of text with [[[[group of text]]]] with up to thousands of instances. The very first one may be missing
      > the [[[ part. That's the only one.
      > I want to delete the ]]] that is not preceded by a [[[ + a group of text that exists. It can always be found as
      > happening after the start of the file (/A) and before any [[[. I apparently don't know how to apply multiline to a look
      > behind to detect this situation.
      > An example:
      > This is the first line in the file.
      > This is the second line in the file.
      > ]]] this is the line I want removed.
      > [[[ this is a valid line
      > any number of lines here are valid lines
      > ]]] this is a valid line.
      > The only one to remove is the first one.
      > Any ideas? This has me stumped. I know how to do it the hard way, by permitting sentences that don't start with ] after
      > the file beginning, but I know there is a better way. Besides, I don't always know how many lines may exist between the
      > top of the file and the first ]]] that is not preceded by a [[[.
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