Zop | Zop.Net Core Development Framework | DevOps library
kandi X-RAY | Zop Summary
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QUESTION
I have a large string file seq.txt
of letters, unwrapped, with over 200,000 characters. No spaces, numbers etc, just a-z.
I have a second file search.txt
which has lines of 50 unique letters which will match once in seq.txt
. There are 4000 patterns to match.
I want to be able to find each of the patterns (lines in file search.txt
), and then get the 100 characters before and 100 characters after the pattern match.
I have a script which uses grep and works, but this runs very slowly, only does the first 100 characters, and is written out with echo. I am not knowledgeable enough in awk or perl to interpret scripts online that may be applicable, so I am hoping someone here is!
...ANSWER
Answered 2020-Nov-10 at 09:17One way
QUESTION
I need to parse a CHANGELOG in Keep a changelog format with grep (or awk, etc in shell/bash) and get the last version (the first one after [Unreleased] tag).
It means, split this file with block '\n## ', ignore the first ([Unreleased]) and get the second (if exists).
With nodeJS, it's very easy and readable CHANGELOG.split(/\n## /)[2];
But I can't make it work with grep ... grep -zoP -m 1 "(\n## .*)(\n## .*)?(\n## )?" CHANGELOG.md
I can't make the regex match group with multiline even using (.|\n)+
Since I'm on it since few days and trying again and again, the Machine Learning found this ##(?:[^be]+[^#]*###)+[^#]*
but, it looks like too heavy for just "block split with \n##
".
ANSWER
Answered 2020-Jul-29 at 09:27Ed can do this.
QUESTION
I am trying to search for a regex with lookahead its not working in pcregrep or grep
I want to search for bits of sections
- which may span over multiple lines,
- which start with PQXY at the beginning of a line and
- end with OFEJ at the end of the line and
- does not contain either PQXY or OFEJ in between
Generall i use the following in sublime text find and works well
...ANSWER
Answered 2020-Feb-24 at 05:59
zsh: event not found: PQXY|OFEJ).)
Since this is zsh
raising the error, it's almost certainly because it's trying to process the stuff within the double quotes. To protect it from that, you should use single quotes, such as:
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