REGEX - how to extract a specific number of rows from a text - regex

Question

I need to find out how to extract a specific number of rows from a text( the number of rows that i want to extract would be variable).
In this case, i want to extract anything from 07/06/2021, up to SOLD FINAL ZI 1
TEXT
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
cccccccccccccccccccccccccccccccccccccccccccccccc
07/06/2021 P2P 00.00
T d r 0000 R A cc R A
r : aadr
REF. ------------------
P l p 00.00
P XX/XX/XXXX 0000000000 :00000000000 P R R
A B OO 0000000000 v e: 00.00 n 0000000000
c t 0.00 n
REF. ------------------
P2P 00.00
T d r 0000 R A c R A
rr : Saracie
REF. ------------------
P2P 00.00
T d r 0000 A. B c R A rr : Sanity
REF. ------------------
P l p 00.00
P XX/XX/XXXX 0000000000 00000000000 P R R
D OO 0000000000 V T: 00.00 n 0000000000 c
T 0.00 n
REF. ------------------
XX/XX/XXXX RULAJ ZI 1 3
SOLD FINAL ZI 1
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
cccccccccccccccccccccccccccccccccccccccccccccccc
In regex, i start with \n(\d{2}/\d{2}/\d{4}) in order to get the data 07/06/2021, but i don't know how to extract the rest.
Thank you in advance!

Answer 1

Hello and welcome to stackoverflow,
your question might not solve your actual problem. Do you REALLY want to "extract a specific number of rows"? This might be a XYProblem.
I like the solution from MDR to extract everything up to SOLD FINAL:
^(\d{2}\/\d{2}\/\d{4})[\s\S]+SOLD FINAL.
I like this because I guess you know the word at the end and not the number of lines. But we can't tell.
Anyway to give you the answer to your question (as your actual problem might look different than we expect) you can use this regex:
^(\d{2}\/\d{2}\/\d{4}).*$(\n^.*$){n}
^ --> look at the beginning of a row
(\d{2}\/\d{2}\/\d{4}) --> your regex for the date
.*$ --> also take the rest of the line
(\n^.*$){n} --> take the next n lines
\n --> the line break
^ --> again: beginning of a new line
.* --> as much characters as needed to match the next (non greedy)
$ --> the end of a line
{n}--> the number of lines you want to extract (replace n ;) )