Going to the <n>th occurrence on a line

Going to the <n>th occurrence on a line

61
Advanced UserAdvanced User
61

    Feb 18, 2009#1

    I have data delimited by ^
    Sample:

    12^eeyryr^^1122^122121^qtyewtwewt^dgheg37636^^^^s^

    I would like to find the <n>th occurence of the ^
    For example to find the first ^
    I used \^ reg expressions and perl. I happily went to each ^
    Next I tried to go to every 2nd ^ and tried \^{2}
    But that did not do what I want. You regex guys are probable laughing now.
    Next I tried \^[^\^]{2}
    That failed too.
    Also note on some "fields" they are empty like ^^ or more together.

    All help is appreciated.

    236
    MasterMaster
    236

      Feb 18, 2009#2

      This is difficult with regular expressions, especially if you only want the nth ^ to be highlighted. It wouldn't be a problem to match everything up until the nth ^, but that isn't what you need, I guess. If Perl were to support variable-length lookbehind, it would be easy to do, but sadly, that's a feature Perl doesn't have.

      I see two options:

      Search for all the text leading up to the nth ^ using the Perl regex ^(?:[^\^]*\^){n-1}[^\^]* - then the cursor will be placed right before the nth ^. (Of course you have to replace n-1 by an actual number)

      If you want to select the nth ^, you could use the approach above in combination with a macro:

      InsertMode
      ColumnModeOff
      HexOff
      Key HOME
      PerlReOn
      Find RegExp "^(?:[^\^]*\^){4}[^\^]*"
      Key RIGHT ARROW
      StartSelect
      Key LEFT ARROW

      to select the fifth ^ in this case.

      A completely different idea:

      You said that these are data delimited by ^. You could use the command "Convert to fixed columns" in the Column menu and specify ^ as the separator character. This will align all the separators throughout the file, ensuring that the nth ^ is always in the same column. Perhaps that's also a possibility?

      61
      Advanced UserAdvanced User
      61

        Feb 19, 2009#3

        Thanks for the great info!!!!!

        I am very interested in all of the options you presented. :D

        All of them are fantastic!!!!