sort file removing duplicates possible?
I had problem with a file today, I don’t know why,
is there any way I can send you the file to take a look?
ok, it’s here:
removing duplicates results contain a duplicate result
patrickdrd last edited by patrickdrd
remove duplicates without sorting produces the result:
(1st and 3rd exact duplicates)
and sorting first and then removing dups results in:
last 2 duplicated
(using your regular expression in both cases of course)
Okay, so a quick look told me what is happening. It’s interesting. :-)
If you run only the sort on this data, you’ll get this at the end of the file:
You’d think that the removal of duplicate lines after this would result in only a single occurrence of
DBServerIP=10.12.77.185. However, if we look closer at what is really left after the duplicate removal (turning on visibility of line-endings!), we see:
We see that the two lines with that IP address truly are different–one has a line-ending and one doesn’t–and because these two lines are not the same, the regular-expression replacement is working correctly by leaving both of these lines after it does its work.
All of the original lines that ended in
.185had line-endings (in other words, were exactly the same), so I’d say this is an artifact resulting from the sort operation (in my mind this is a sort BUG!).
But we can work around it. There could be a regular expression solution, but maybe the regex that removes duplicates is complicated enough. What I’d suggest here is to modify the original macro, after the sort but before the find+replace, to:
- move caret position to the end of file (the sort operation leaves it at the beginning of file)
- insert a (Windows style) line-ending
- move caret position back to beginning of file (in preparation for the find+replace)
<Macro name="test sort and del dupe lines 2" Ctrl="no" Alt="no" Shift="no" Key="0"> <Action type="2" message="0" wParam="42059" lParam="0" sParam="" /> <Action type="0" message="2318" wParam="0" lParam="0" sParam="" /> <Action type="1" message="2170" wParam="0" lParam="0" sParam="
" /> <Action type="1" message="2170" wParam="0" lParam="0" sParam="
" /> <Action type="0" message="2316" wParam="0" lParam="0" sParam="" /> <Action type="3" message="1700" wParam="0" lParam="0" sParam="" /> <Action type="3" message="1601" wParam="0" lParam="0" sParam="(?-s)^(.*)(?:\R)(?s)(?=.*^\1\R)" /> <Action type="3" message="1625" wParam="0" lParam="2" sParam="" /> <Action type="3" message="1602" wParam="0" lParam="0" sParam="" /> <Action type="3" message="1702" wParam="0" lParam="512" sParam="" /> <Action type="3" message="1701" wParam="0" lParam="1609" sParam="" /> </Macro>
Compare that with the earlier version much earlier in this thread.
Running this new macro on your data results in:
which is the desired result.
DBServerIP=10.1.249.215case you mentioned, if you don’t do the sort first, then a
.215line is the last line of the data you turn over to the regular expression replace operation. Thus it lacks the trailing line-ending that the earlier occurrence of a similar line has. Same issue as the
thanks a ton!
I’d a like a more “generic” approach, so I called trim 42056 to clear empty lines first,
because sorting puts an empty line at the top if is finds one,
then going on as you suggested
Scott Sumner last edited by Scott Sumner
I’m glad you have a solution. Yeah, the empty line thing with sorting is rather bad, but the end-user can’t control this behavior of the sorting. I think I’ve changed my mind and it is probably best to alter the regular expression a bit in order to handle the situation where there is a duplicate-but-without-line-ending at the end of the file. So I’d suggest changing it to:
I’ve done two things to this regex:
- I removed the
)around the first
\R(a simplification discussed earlier so no need to say any more here)
- The final
\Rwas changed to
(?:\R|\z)(see discussion below)
\R|\zpart is what allows an almost-duplicate at the end-of-file-without-line-ending to be detected. The new part to this is the
\zwhich roughly means “match only at the very end of the data”.
)was added so that the
|only affects the
\Rthat precedes it and the
\zthat follows it
- I removed the
guy038 last edited by
Generally speaking, when you want to remove duplicate lines, from a
PREVIOUSLY SORTEDlist, just use this simple regex S/R, below :
This regex is quite fast, because, in case of numerous duplicates, the part
\1+grabs all the duplicates ( with their EOL characters ), at once and just rewrites the first item of each block :-))
IMPORTANT : the last item of your sorted list must be followed by EOL character(s) !
after trying both the macro and the textfx solution for a long time,
I’ve seen that still ultraedit’s sorting works much better than both of them,
I first rejected the macro for textfx’s favor but I found out lately that neither the latter does a good job, at least I prefer the sorting done by ultraedit ,sorry,
I don’t have an example at the moment, I’ll post again when I do
sorry, did not read the whole thread but what about a python one liner?
thanks, I’m keeping that too and I’ll let you know
patrickdrd last edited by patrickdrd
ok, I tested, this doesn’t work either somehow, at least doesn’t work like ue’s one, i.e.
I tested with easylist from: https://easylist.to/easylist/easylist.txt (69883 lines),
ue’s function cuts it to: 69238
python scipt: 69818
macro (scott) is a bit slow and results in 19610 lines (!) and
textfx results in 69818 as well
guy038 regular expression results in 28109 lines,
according to my experience, I bet that ue’s result is the correct one,
at least to my taste
could you, by any chance, upload the ue cutted list?
To see the differences.
yes, of course, please tell me where, pastebin doesn’t work, it’s blocked here (at work),
any other suggestions?
Claudia Frank last edited by Claudia Frank
Yea, I used to be a fan of regular expression replacement when doing this, but with “larger” datasets there always seems like there is so much tweaking and experimentation needed to get it right (for a particular dataset) that it is hardly worth it, unless you like playing with regular expressions all day instead of solving a particular problem and moving on quickly.
A Pythonscript solution such as @Claudia-Frank 's seems fine…
ok, but why results are inconsistent (with large datasets)?
@Claudia-Frank, unfortunately I’m not able to access zippyshare either,
so I’ll upload to pastebin from home if we don’t find another solution
I installed the ue trial version but can’t find the menu item to delete the duplicates.
Is there anything I need to install in addition or am I blind and don’t see the obvious?