How to highlight adjacent duplicate lines

Question

Is there a way to highlight duplicate lines in Vim, in a file, BUT only if they're adjacent to each other, i.e. if there is a line (in line 1) and there is a duplicate of that line (in line 99), do not highlight that.

But if there is a line in (line n), and there is a duplicate of that line in lines (either, n-1 or n+1) highlight those (or just duplicates).

Is it something regex can accomplish?

(this is waaay off my regex skills)

score 5 · Accepted Answer · answered Feb 05 '12 at 11:36

5

Try this:

:set hls
/^\(.*\)\n\1$

answered Feb 05 '12 at 11:36

Zsolt Botykai

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Yup, that's it :) Know I'm a pain, but is there a way to highlight only the duplicates? – Rook Feb 05 '12 at 12:17
@Idigas for that one I'd recommend to modify the function defined in this answer: http://stackoverflow.com/a/1270689/11621 – Zsolt Botykai Feb 05 '12 at 21:36
Ah, excellent - that's exactly what I was looking for (the other answer). – Rook Feb 05 '12 at 22:16

score 0 · Answer 2 · answered Feb 05 '12 at 14:34

0

Try the following custom match pattern.

:match Conceal /^\(.*\)\n\%(\1\n\)\+/

Use

:match none

to disable previously defined highlighting.

answered Feb 05 '12 at 14:34

ib.

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How to highlight adjacent duplicate lines

2 Answers2