Do you have more to say on this topic? I’m interested…

So, guys, if you don’t mind, I would like you to test the regex C , with the first test file, above, in order to verify if it is “laptop-dependent”. I means, may be, results are not pertinent with my weak Windows XP configuration !?

I did this and obtained exactly the same results as you did, @guy038. Specifically, OK with 21524 identical lines, and NOT OK with 21525 identical lines. I tried both the shorter and longer versions of those “middle” lines in the file. All this using Notepad++ 7.2.2, 32-bit. I doubt that any other (reasonable) version of Notepad++ will show different results.

I’m looking for the results of your own tests, relative to the biggest block of consecutive identical lines, correctly handled by the six regexes A to F, above, and the test file, below

So it might be worth pointing out a good method for creating an arbitrary (i.e., large!) number of the abcdefghij#9999999999 lines in your request.

Here’s what I would do:

• put caret on that line in a tab created for the purpose of testing this
• start macro recording
• press ctrl+d (to execute the Duplicate Current Line function)
• stop macro recording
• go to the Macro menu and choose Run a Macro Multiple Times…
• fill in the prompt box entries and press Run (to create the desired number of lines)

To see how many lines of this type you’ve currently got, simply do a literal Count search for abcdefghij#9999999999.

Sorry for the delay, but I was busy with some garden work (hedge trimming !) and, of course, I also tested the 6 regex, from A to F, of my previous post !

I used the following test file :

a#9999999999
a#9999999999
abcdefghij#9999999999
.........................
.........................
..21524 IDENTICAL lines ( in totality ! )
.........................  
.........................  
abcdefghij#9999999999
z#9999999999
z#9999999999

As you can see :

• It begins with the 2 identical lines a#9999999999

• Then, followed with 21524 identical lines abcdefghij#9999999999

• And it finished with the 2 identical lines z#9999999999, followed with a final line-break

So, I ran the regex C of my previous post, ( (?-s)^(.+#).*\R(\1.*\R)+ ), against this test file

=> It correctly matched the 2 lines, at beginning of file, then the 21524 identical lines ( => a selection of 495,103 characters ) and, the 2 lines at the end of the file

Then, I simply added ONE additional line abcdefghij#9999999999 to that file and ran the regex again. This time, it matched the 2 lines, at beginning of file, but wrongly grabbed all remaining text ( So the 21525 lines AND the 2 last lines ) !?

To verify if the results depended of the size of the selection, I changed the test file,with lines of 140 chars, as below :

a#9999999999
a#9999999999
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz#9999999999999999999999999999999999999999999999999999999999999999999999999999999999999
.........................
.........................
..21524 IDENTICAL lines ( in totality ! )
.........................  
.........................  
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz#9999999999999999999999999999999999999999999999999999999999999999999999999999999999999
z#9999999999
z#9999999999

I was very surprised to see that results were exactly the same ( OK for 21524 identical lines and KO for 21525 identical lines !!?? ) And yet, this time, the selection contained 3,013,360 chars !

Of course, I did this test with all the other regexes. For example, with regex A, the limit is a bit higher : 25120 lines. But again, after adding one more line, the regex A failed :-((

So, guys, if you don’t mind, I would like you to test the regex C , with the first test file, above, in order to verify if it is “laptop-dependent”. I means, may be, results are not pertinent with my weak Windows XP configuration !?

In the meanwhile , seemingly, we can conclude that, in a previously sorted file, a regular expression can handle, roughly, not more than 21,000 identical lines, at a time ! I’d be glad to receive your feed-back in order to confirm or invalidate this fact :-))

Of course, I came to this temporary conclusion, after testing my 6 regexes, from A to F, against real text. I decided to take all contents of a novel, on the Gutenberg site. And…, as I’m French, my choice was, naturally, the novel “The count of Monte-Cristo” by Alexandre Dumas, that you may download from the link below:

http://www.gutenberg.org/files/1184/1184-0.txt ( Choose the link “Raw text UTF-8” )

When I first tried to build a suitable sorted working file, in order to test my regexes, unfortunately, all failed :-(( But I also noticed, in that sorted file, that there were numerous lines the#...... Indeed, if you download the novel, just count the occurrences of the regex \bthe\b => 28628 occurrences of the article “the”. So I deleted all these consecutive occurrences of the word “the”. This time all my regexes worked as expected :-))

However, note that, during my tests, I found out that my regexes D to F were, initially, erroneous. So I changed them, and I already updated my previous post with the correct regexes !

With the help of that page, below, on the most common words in English :

https://en.wikipedia.org/wiki/Most_common_words_in_English

I verified, with the regex \bWord\b, that, in this novel, the 10 most common words used, in the initial text, are :

the          28,628  ( ABSENT in the SORTED file )
to           12,897
of           12,916
and          12,570
a             9,473
I             8,393
you           8,288
he            6,945
in            6,625
his           5,909

So, we are sure that the 6 regexes can, at least, manage files containing up to 13,000 consecutive identical lines !

Now, if some people is interested about the different steps, that I used to constitute a decent working file, for testing regexes A to F, just have a glance to the table, below :

•------------------------------------•---------------•-----------------------------------------------------------------------------------------------------•-------------• 
|            SEARCH                  |    REPLACE    |                                       EXPLANATIONS                                                  | Occurrences |
•------------------------------------•---------------•-----------------------------------------------------------------------------------------------------•-------------•
|                                    |               | We delete, manually, from BEGINNING of file to the END of the CONTENTS part                         |             |
|                                    |               |                                                                                                     |             |
|                                    |               | We delete, manually, from AFTER the FOOTNOTES part till the VERY END of file                        |             |
|                                    |               |                                                                                                     |             |
| ,(?=\d)                            |    EMPTY      | We delete any COMMA separator in NUMBERS                                                            |       264   |
|                                    |               |                                                                                                     |             |
| [,;.]                              | \x20          | We change any punctuation END of a (part of) SENTENCE with a SPACE character                        |    72,423   |
|                                    |               |                                                                                                     |             |
| (?i)o’(?=clock)                    | of\x20the\x20 | We replace the "o’" CONTRACTIVE form with the COMPLETE form "of the "                               |       164   |
|                                    |               |                                                                                                     |             |
| (?i)’s|(?<!\w)’|’(?!\w)            |    EMPTY      | We delete the "’s" string and any "’" sign NOT SURROUNDED with WORD chars                           |     2,754   |
|                                    |               |                                                                                                     |             |
| (?i)(d|l)’                         | \1e\x20       | We change the "d’" and "l’" French CONTRACTIVE forms to, RESPECTIVELY, "de " and "le "              |       311   |
|                                    |               |                                                                                                     |             |
| —|-                                | \x20          | We change any HYPHEN-MINUS character as well as the EM DASH char, with a SPACE character            |     4,933   |
|                                    |               |                                                                                                     |             |
| [^\w’\r\n ]                        | \x20          | We ONLY keep WORD, SPACE, and EOL characters and the ’ sign( PRESENT in English CONTRACTIVE forms ) |    38,795   |
|                                    |               |                                                                                                     |             |
| (?-i)(?<=\s)(?=\w)[^aAIVX\d](?=\s) | \x20          | As ONE-char STRING, we ONLY keep article "A", "a", pronoun "I", DIGITS and ROMAN letters "V" , "X"  |     1,151   |
|                                    |               |                                                                                                     |             |
| ^\h*\R|^\h+|\h+$|\h+(?=\h)         |    EMPTY      | We delete PURE BLANK lines, TRIM spaces at START and END, and REDUCE to a ONE SPACE gap             |   107,108   |
|                                    |               |                                                                                                     |             |
| \x20          ( > 1 mn ! )         | \r\n          | Finally, we change any SINGLE SPACE character with a LINE BREAK                                     |   419,769   |
|                                    |               |                                                                                                     |             |
| COLUMN editor, with LEADING zeros  |               | At LINE 1, COLUMN 1                                                                                 |             |
|                                    |               |                                                                                                     |             |
| (?-s)^(\d{6})(.+)                  | \2#\1         | We SWAP each WORD and its REFERENCE number                                                          |   464,233   |
|                                    |               |                                                                                                     |             |
| (?i)^the#                          |               | We BOOKMARK all the LINES, containing the article "the", whatever its CASE                          |    28,529   |
|                                    |               |                                                                                                     |             |
| Bookmark > Cut Bookmarked Lines    |               | We BACKUP all these lines in an OTHER file, for FURTHER processing                                  |             |
|                                    |               |                                                                                                     |             |
| Sort lines Lexico... ASCENDING     |               | => A work SORTED file, encoded UTF-8 with BOM, of 5,861,424 BYTES, with 435,704 WORDS, ONE per line |             |
|                                    |               |                                                                                                     |             |
•------------------------------------•---------------•-----------------------------------------------------------------------------------------------------•-------------•

Now, applying the regexes A to F, against the sorted file obtained, I got, after 10s about for each, the coherent results, below :

•-------•---------------------------------------•----------•-------------•--------------•
| Regex |                SEARCH                 |  REPLACE | Occurrences | LINES Number |
•-------•---------------------------------------•----------•-------------•--------------•
|       |    Work SORTED file, obtained, AFTER all the steps above :     |    435,704   |
•-------•---------------------------------------•----------•-------------•--------------•
|       |                                       |          |             |              |
|   A   |  (?-s)^(.+#).*\R(?:\1.*\R)+           |  EMPTY   |    10,818   |      6,861   |
|       |                                       |          |             |              |
|   B   |  (?-s)^((.+#).*\R)(?:\2.*\R)+         |  \1      |    10,818   |     17,679   |
|       |                                       |          |             |              |
|   C   |  (?-s)^(.+#).*\R(\1.*\R)+             |  \2      |    10,818   |     17,679   |
|       |                                       |          |             |              |
|   D   |  (?-s)^(.+#).*\R(?:\1.*\R)+|.+\R      |  ?1$0    |    17,679   |    428,843   |
|       |                                       |          |             |              |
|   E   |  (?-s)^((.+#).*\R)(?:\2.*\R)+|.+\R    |  \1      |    17,679   |     10,818   |
|       |                                       |          |             |              |
|   F   |  `(?-s)^(.+#).*\R(\1.*\R)+|.+\R	    |  \2      |    17,679   |     10,818   |
|       |                                       |          |             |              |
•-------•---------------------------------------•----------•-------------•--------------•

It’s easy to verify that :

• 6,861 lines, after regex A + 428,843 lines, after regex D = 435,704 ( Total of the file )

• 6,861 lines, after regex A, + 10,818 lines, after regex E = 17,679 lines, after regex B

• 6,861 lines, after regex A, + 10,818 lines, after regex F = 17,679 lines, after regex C

On the other hand :

• The 10818 occurrences of regexes A, B and C correspond to all the first/last duplicate lines, as after regexes E or F

• The 17,679 occurrences of regexes D, E and F correspond to all first/last duplicate lines AND all the uniques lines, too, as after regexes B or C

Note also that :

• With the 3 regexes A, B and C, the unique lines, which must be kept, are,simply, not processed by the regexes

• With the 3 regexes D, E and F, the unique lines, which must be deleted, are matched by the second alternative .+\R of the regexes

So, guys, as I said, above, I’m looking for the results of your own tests, relative to the biggest block of consecutive identical lines, correctly handled by the six regexes A to F, above, and the test file, below :

a#9999999999
a#9999999999
abcdefghij#9999999999         )
.....................         )
.....................         )   HOW MANY lines ? ( THANKS for testing !!)
.....................         )
abcdefghij#9999999999         ]
z#9999999999
z#9999999999

Best Regards,

guy038

doesn’t match the whole line,
e.g. it tells me that adobe.com exists, but I only have lines that end in adobe.com, e.g. get.adobe.com

the regex engine ends up , matching, wrongly, all file contents

As mentioned in this thread, this is in all likelihood caused by this problem.

thanks a lot for your effort, but too much fuss, isn’t it?

NOTHING is too much fuss for @guy038 ! :-D

vlookup in excel is easier to do I think

Unfortunately, again, I verified that my previous method works, only, if file contents and/or number of lines processed are not too important :-(( In most cases, the regex engine ends up , matching, wrongly, all file contents. Too bad !

So, if you wish to keep the initial order of your file, here is, a new method to adopt, which covers all cases ( I hope so ! ), in order to keep/delete duplicate lines AND/OR all non-duplicate lines of a file, whatever its size !

Please, do any test, even on mportant files to verify that this method is robust and does not fail ! I’ll be glad to get your feedback :-))

So, let’s start with that sample text :

567890
1234
45
1234
xyz
567890
567890
000000000
567890
45
abcdef
1234
1234
45
hijk
45
45
567890
1234
999
1234

• Move the cursor at the beginning of the first item 567890

• Open the Column editor ( Edit > Column Editor... )

• Insert a decimal sequence of numbers, ticking the Leading zeros option

• Delete the last isolated number 22

=>

01567890
021234
0345
041234
05xyz
06567890
07567890
08000000000
09567890
1045
11abcdef
121234
131234
1445
15hijk
1645
1745
18567890
191234
20999
211234

• Now, use the regex S/R, below, to swap the positions of data and numbers, where N is the number of digits, of the previous numbering, and to insert of a separation character ( I chose the # character, but any individual char may suit, providing it’s not used in your data. Prefer a character which is not a meta-character used in regexes ! )

  • SEARCH ^(?-s)^(\d{N})(.+)

  • REPLACE \2#\1

As, in our example, N = 2, it leads to the text :

567890#01
1234#02
45#03
1234#04
xyz#05
567890#06
567890#07
000000000#08
567890#09
45#10
abcdef#11
1234#12
1234#13
45#14
hijk#15
45#16
45#17
567890#18
1234#19
999#20
1234#21

• Then, execute a sort with the menu option Edit > Line Operations > Sort Lines Lexicographically Ascending =>

000000000#08
1234#02
1234#04
1234#12
1234#13
1234#19
1234#21
45#03
45#10
45#14
45#16
45#17
567890#01
567890#06
567890#07
567890#09
567890#18
999#20
abcdef#11
hijk#15
xyz#05

Important : Till the end of that post, this sorted text becomes the new sample text !

Now, here are the six regex S/R that cover all possible cases :

• Regex A : SEARCH (?-s)^(.+#).*\R(?:\1.*\R)+ and REPLACE Leave EMPTY

• Regex B : SEARCH (?-s)^((.+#).*\R)(?:\2.*\R)+ and REPLACE \1

• Regex C : SEARCH (?-s)^(.+#).*\R(\1.*\R)+ and REPLACE \2

• Regex D : SEARCH (?-s)^(.+#).*\R(?:\1.*\R)+|.+\R and REPLACE ?1$0

• Regex E : SEARCH (?-s)^((.+#).*\R)(?:\2.*\R)+|.+\R and REPLACE \1

• Regex F : SEARCH (?-s)^(.+#).*\R(\1.*\R)+|.+\R and REPLACE \2

So, in a previously sorted file ( I insist ! ) and whatever the numbering after the # symbol :

• If you want to delete all duplicate lines, only, use the regex A

• If you want to keep isolated lines AND the first line of each block of duplicate lines, only, use the regex B

• If you want to keep isolated lines AND the last line of each block of duplicate lines, only, use the regex C

• If you want to delete isolated lines, only, use the regex D

• If you want to keep the first line of each block of duplicate lines, only, use the regex E

• If you want to keep the last line of each block of duplicate lines, only, use the regex F

Here are, below, the results of these six regex S/R, against the sample text :

•----------------•----------------•----------------•----------------•----------------•----------------•
|    Regex A     |    Regex B     |    Regex C     |    Regex D     |    Regex E     |    Regex F     |
•----------------•----------------•----------------•----------------•----------------•----------------•
|  000000000#08  |  000000000#08  |  000000000#08  |  1234#02       |  1234#02       |  1234#21       |
|  999#20        |  1234#02       |  1234#21       |  1234#04       |  45#03         |  45#17         |
|  abcdef#11     |  45#03         |  45#17         |  1234#12       |  567890#01     |  567890#18     |
|  hijk#15       |  567890#01     |  567890#18     |  1234#13       |                |                |
|  xyz#05        |  999#20        |  999#20        |  1234#19       |                |                |
|                |  abcdef#11     |  abcdef#11     |  45#03         |                |                |
|                |  hijk#15       |  hijk#15       |  45#10         |                |                |
|                |  xyz#05        |  xyz#05        |  45#14         |                |                |
|                |                |                |  45#16         |                |                |
|                |                |                |  567890#01     |                |                |
|                |                |                |  567890#06     |                |                |
|                |                |                |  567890#07     |                |                |
|                |                |                |  567890#09     |                |                |
•----------------•----------------•----------------•----------------•----------------•----------------•

• Now, considering any of these 6 results, just above, let’s swap, with the regex S/R, below, the two blocks of data, on either side of the # character

  • SEARCH ^(?-s)^(.+)#(.+)

  • REPLACE \2#\1

We get the different cases, below :

•----------------•----------------•----------------•----------------•----------------•----------------•
|    Regex A     |    Regex B     |    Regex C     |    Regex D     |    Regex E     |    Regex F     |
•----------------•----------------•----------------•----------------•----------------•----------------•
|  08#000000000  |  08#000000000  |  08#000000000  |  02#1234       |  02#1234       |  21#1234       |
|  20#999        |  02#1234       |  21#1234       |  04#1234       |  03#45         |  17#45         |
|  11#abcdef     |  03#45         |  17#45         |  12#1234       |  01#567890     |  18#567890     |
|  15#hijk       |  01#567890     |  18#567890     |  13#1234       |                |                |
|  05#xyz        |  20#999        |  20#999        |  19#1234       |                |                |
|                |  11#abcdef     |  11#abcdef     |  03#45         |                |                |
|                |  15#hijk       |  15#hijk       |  10#45         |                |                |
|                |  05#xyz        |  05#xyz        |  14#45         |                |                |
|                |                |                |  16#45         |                |                |
|                |                |                |  01#567890     |                |                |
|                |                |                |  06#567890     |                |                |
|                |                |                |  07#567890     |                |                |
|                |                |                |  09#567890     |                |                |
•----------------•----------------•----------------•----------------•----------------•----------------•

• Considering any of these 6 results, just above, perform, again, a sort, with the option Edit > Line Operations > Sort Lines Lexicographically Ascending =>

•----------------•----------------•----------------•----------------•----------------•----------------•
|    Regex A     |    Regex B     |    Regex C     |    Regex D     |    Regex E     |    Regex F     |
•----------------•----------------•----------------•----------------•----------------•----------------•
|  05#xyz        |  01#567890     |  05#xyz        |  01#567890     |  01#567890     |  17#45         |
|  08#000000000  |  02#1234       |  08#000000000  |  02#1234       |  02#1234       |  18#567890     |
|  11#abcdef     |  03#45         |  11#abcdef     |  03#45         |  03#45         |  21#1234       |
|  15#hijk       |  05#xyz        |  15#hijk       |  04#1234       |                |                |
|  20#999        |  08#000000000  |  17#45         |  06#567890     |                |                |
|                |  11#abcdef     |  18#567890     |  07#567890     |                |                |
|                |  15#hijk       |  20#999        |  09#567890     |                |                |
|                |  20#999        |  21#1234       |  10#45         |                |                |
|                |                |                |  12#1234       |                |                |
|                |                |                |  13#1234       |                |                |
|                |                |                |  14#45         |                |                |
|                |                |                |  16#45         |                |                |
|                |                |                |  19#1234       |                |                |
•----------------•----------------•----------------•----------------•----------------•----------------•

• Finally, let’s use this last regex S/R to get rid of all the counting marks

  • SEARCH (?-s)^.+#

  • REPLACE Leave Empty

We obtain the 6 final results, from the original text :

•----------------•----------------•----------------•----------------•----------------•----------------•
|    Regex A     |    Regex B     |    Regex C     |    Regex D     |    Regex E     |    Regex F     |
•----------------•----------------•----------------•----------------•----------------•----------------•
|    xyz         |    567890      |    xyz         |    567890      |    567890      |    45          |
|    000000000   |    1234        |    000000000   |    1234        |    1234        |    567890      |
|    abcdef      |    45          |    abcdef      |    45          |    45          |    1234        |
|    hijk        |    xyz         |    hijk        |    1234        |                |                |
|    999         |    000000000   |    45          |    567890      |                |                |
|                |    abcdef      |    567890      |    567890      |                |                |
|                |    hijk        |    999         |    567890      |                |                |
|                |    999         |    1234        |    45          |                |                |
|                |                |                |    1234        |                |                |
|                |                |                |    1234        |                |                |
|                |                |                |    45          |                |                |
|                |                |                |    45          |                |                |
|                |                |                |    1234        |                |                |
•----------------•----------------•----------------•----------------•----------------•----------------•

Remark : This method needs numerous steps, but is quite safe, because all the modifications, produced by the different S/R, concern one line at a time ( or a consecutive block of lines, in regexes A to F ! )

Of course, on huge files , execution time may be important, but you should get the expected results, at the end ;-))

Cheers,

guy038

(?-s)^(.+)\R(?s)(?=.*\R\1\R?)

but as guy said, it doesn’t work with large (or kind of) files,
my file is 1-1,5mb (a bit over 50k records) and it doesn’t work

anyway, I did it with excel vlookup function

As for different bookmark colors, I know it can be done as @Scott_Sumner mentioned it recently, or rather he mentioned a different icon, so presumably a different colour is also possible. I suggest have a look through his posts. This can be done by selecting a poster (their name in blue), then in their profile page the right hand side lists posts going backwards in time, last at the top.

It’s bed time for me. Likely someone else will respond overnight if you are still having issues.

Good luck

Terry

I tried with this one:

(?-s)^(.+)\R(?s)(?=.*\R\1\R?)

and it gives me 3 results only (I expected 7) and
how/where do I set bookmark colors in notepad++?

In this one the object was to remove duplicate lines. However you could use the same regex to “Mark” the line. Actually in the Mark function you would also tick “bookmark line”. This should identify all the lines in the first file (which is above the — line stated in that post. The second file would be below that line. Because you aren’t removing any lines the first file needs to have ONLY unique lines for the regex to correctly identify duplicates across the 2 files.

Have a go using that. Come back if issues arise. Please note that Notepad++ has issues with large files, so possibly read the remainder of that thread first.

Terry

basically the files are two, I join them,
anyway, what I would like to do now is to find out
which lines of the first file exist in the second,
I tried with examdiff I use (trying to compare two sorted files),
but it didn’t return proper results

imagine that the first file acts as a “whitelist” against the second file

So, if you do not need to give the initial order of your data, it’s quite easy !

Imagine, for instance, the initial text :

789
123
456
123
xyz
789
789
000
789
456
abc
123
123
456
hij
456
456
789
123
999
123

Which gives, after lexicographically ascending sort :

000
123
123
123
123
123
123
456
456
456
456
456
789
789
789
789
789
999
abc
hij
xyz

• Now, just verify that, AFTER sort, the last line of your data is followed with a pure blank line

• Then, use the regex S/R, below, which will delete any duplicated line, leaving isolated lines, only :

  • SEARCH (?-s)^(.+\R)\1+

  • REPLACE Leave EMPTY

=> You’ll get, as expected, the sorted list of the isolated lines :

000
999
abc
hij
xyz

Now, if you prefer to keep the initial order of your data list, I surely found correct regexes, in the past, to achieve such a task, but, I didn’t want to bother looking for where ;-))

So, thinking about a possible solution and having the results of the previous regex in front of me, everything became clear ! Don’t you see…?

• First, copy in a new tab, your original list

• Then, add a line with, let’s say, some equal signs =

• Finally add the previous results ( that is to say, all the isolated lines, after sort and regex replacement ) !

So, we have the following text :

789
123
456
123
xyz
789
789
000
789
456
abc
123
123
456
hij
456
456
789
123
999
123
======
000
999
abc
hij
xyz

• Now, use the regex S/R, below, which will keep the isolated lines, only, in their initial order ;-)

  • SEARCH (?-s)^(.*\R)(?s)(?!.*^=+.*^\1)

  • REPLACE Leave EMPTY

giving :

xyz
000
abc
hij
999

As you can see, these unique lines are listed, according to their initial location. Nice !

Notes :

• The regex matches any line which cannot be found, further on, after the line ======

• Note that when the regex engine reaches the string ======, this line, and the subsequent ones cannot be followed, further on, with a second line ====== => The negative look-ahead returns TRUE. Consequently, the ====== line and all the sorted isolated lines, obtained in the first part of this post, are, also, deleted ;-))

Best Regards,

guy038

Terry

I think you need to read the link I provided. Whilst you have given some additional information some examples might be worthwhile (as stated in that post).

So far we have ALL lines that are copies of each other to be deleted.

I can think of a possible solution but 1 question currently is, can the lines be sorted? If so it would make it much easier using a regex (regular expression) to do so. When they are together they can be easily removed.

As I said read the link I provided and if you are able to, give us some idea of the type of data you need fixing.

Terry

Read the FAQ, in particular
https://notepad-plus-plus.org/community/topic/15739/faq-desk-request-for-help-without-sufficient-information-to-help-you

I see the next post elaborated slightly but it’s still unclear.

Say for example I have

12345
12346
12347
2345
12345
234
12345

Do you want ALL 12345 deleted or just the 2nd and 3rd copies.
OR do you want 1st and 2nd copies deleted and the 3rd copy remains.

You see it all depends on you providing enough information for us to give you help. You help us to help you.

Terry