Questions tagged [perl]
Perl is a high-level, general-purpose, interpreted, dynamic programming language. It was originally developed by Larry Wall as a general-purpose Unix scripting language to make report processing easier, over a period with support from open source community, it has evolved and matured to be used for graphics programming, system administration, network programming, finance, bioinformatics, and other engineering applications.
1,387 questions
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Perl RegEx one-liner that outputs all matches from one line of STDIN
Here is a silly example that effectively illustrates what I need:
echo '"this text", " ", "is in speech marks"' | perl -lne 'print "$1" if /"(.*?)"/'
...
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3
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6
answers
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regex to find text plus trailing 10+ spaces; sum of two matches' lengths is part of matching condition
I'm trying to clean files that are copy/pasted versions of my Cygwin (mintty) terminal running bash1. Usually, the input and output are separated by a linefeed ('\n'), as expected. However, when I ...
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votes
5
answers
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Perl or sed script to remove a specific content of a file from another bigger file
I have a file (FILE1) with some repeated sections as below (example):
LINE 1 ABCD
LINE 2 EFGA
LINE 3 HCJK
REMOVE LINE11
REMOVE LINE12
REMOVE LINE13
LINE 4 ABCDH
LINE 5 EFGAG
LINE 6 HCJKD
REMOVE ...
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8
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4
answers
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Why do my UTF-8 filenames always match against a regex bracket expression in Perl?
Here is a script to fix broken Cyrillic filenames if the files were moved to Mac from Windows (based on an answer to Revert filenames after they were garbled by using different encoding)
#!/bin/zsh
# ...
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0
votes
1
answer
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Perl: The module is installed but doesn't work
I remember I have installed Perl::Rename, by using cpan -i File::Rename, and indeed I have $HOME/perl5/bin with rename and unsafe-rename executables there.
But when I try to use rename,
# Expected: ...
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1
vote
1
answer
76
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Git hook on SSH remote fails due to not reading shell configuration
I'm using a git post-receive hook to perform some actions
after a git push to a remote server. This remote operates
over SSH:
$ git remote -v
server user@server:repo.git
The problem is that ...
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6
votes
3
answers
560
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How to make Perl half/full width-insensitive regular expressions?
In Perl, /a/i matches both A and a, so I don't have to write /A|a/.
What is the easy way to write /４|4/ ?
Yes, I'm talking about
$ unicode ４ 4|grep U+
U+FF14 FULLWIDTH DIGIT FOUR
U+0034 DIGIT FOUR
...
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2
votes
1
answer
507
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Attempt to call undefined import method with arguments ("abs2rel") via package "File::Spec"
I have Debian GNU/Linux trixie/sid and I installed publican from repo of debian. (publican is doing write and publish for DocBook)
When I run publican , It get the following messages:
Attempt to call ...
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0
votes
1
answer
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Error when installing ImageMagick with perlbrew
I am trying to install ImageMagick for perlbrew as an application needed a higher version of Perl than the one that came with my Ubuntu, and this application also needs to use ImageMagick.
I am on ...
1
vote
1
answer
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What is the "reports" command in install errors
While trying to install the Chart::Clicker perl module, I get a lot of dependency errors. When trying to resolve them, I get similar output for each module from the first to the last module listed in ...
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3
votes
1
answer
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Replace accented characters with perl-rename
I'm standardizing the name of several files at once, so I wrote a regex for perl-rename:
perl-rename 'y/A-Z/a-z/; s/ã|á|â/a/g; s/é|ê/e/g; s/í/i/g; s/õ|ó/o/g; s/ú/u/g; s/ç/c/g; s/(?<=\d-)*\s/_/g; s/...
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1
vote
1
answer
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Fedora 40 - Apache Perl CGI - Open for writing fails
Last week, I upgraded my Linux file server from Fedora 39 to Fedora 40, and several CGI applications written in Perl stopped working. I first noticed it when Foswiki could not show any pages, because ...
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0
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1
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Combining multiple files by year (column in data) into one line and add file name as first column in Perl or Python
I have over 3000 files that need to be combined based on specific attributes in the files. For example, each file is named by its ID (Eg. 101567AD_Mly.txt).These IDs correspond to latitude and ...
1
vote
3
answers
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make master/slave ip in different subnet
For reference, this is a follow-up and variation on group ip address to different subnet with shell
We have two strings (named master/slave), the two strings are composed with IPS spread in three ...
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2
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grep specified variable from a file [closed]
I have a variable like
master='172.21.154.37 172.21.250.94 172.21.251.93 172.21.250.94'
and I need to check whether the first and the second column in the file both matches the variable. The following ...
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