68,313 questions
2
votes
1
answer
120
views
Split hash by array value
If there's a hash where one of the values is an array, what's the shortest way to split into an array-of-hashes (AoH) for each array value that keeps all the hash keys and values, except for replacing ...
- 4,245
1
vote
2
answers
103
views
Substitute if not in group of characters
How can I substitute every character that is:
not WORD (a-z, A-Z, 0-9) and also
not minus (-) and also
not hash (#)
to underline (_)
e.g.
"aB-09 !#" => "aB-09__#"
&...
- 12.7k
0
votes
1
answer
137
views
monitor json files in streaming mode [closed]
I want to monitor JSON output in streaming mode. I have an external application that outputs nested JSON for new items in real-time. When new items arrive, I want to parse the JSON and print some of ...
- 1,247
1
vote
0
answers
79
views
Problem with mn_def_pars() function in PDL::Minuit
This package of the Perl Data Language
https://metacpan.org/pod/PDL::Minuit
When I run only the parameter definition part of the example program:
use PDL::LiteF;
use PDL::Minuit;
mn_init(\&$chi2, {...
- 185
2
votes
3
answers
146
views
How to properly replace long strings in Perl
Let's say I want to replace every occurrence of 12345 in file1 with the contents of file2. The following code works:
use strict;
use warnings;
local $/;
open my $fh, 'file1' or die "$!";
...
- 359
2
votes
1
answer
131
views
How do you decode a JSON boolean to a Perl boolean?
I would like the following code to round-trip properly on Perl ≥5.36.
❯ perl -MCpanel::JSON::XS=decode_json,encode_json -Mbuiltin=false,true -MDevel::Peek=Dump -E'
say Cpanel::JSON::XS->VERSION;...
- 39.3k
1
vote
4
answers
231
views
Multiple replaces between markers but not outside them
To avoid some confusion and questions, I changed the new string to "letters", so it would not match "text", so to avoid infinite loops.
I work under Windows, with the perl provided ...
- 2,331
3
votes
1
answer
88
views
Why is AnyEvent slowing down or leaking memory?
While writing a new Perl module which was capable of using AnyEvent, my benchmarking tests showed that it was slowing down dramatically over time. Turning off AnyEvent cured the problem, which ...
- 1,259
2
votes
3
answers
128
views
When setting pattern property from a string in JavaScript, how to preserve the backslashes?
Related to Properly simulate "pattern" attribute with javascript:
How do I set an input pattern using JavaScript?
when I try element.pattern = 'a\S' (as a trivial example), then the pattern ...
- 4,778
-2
votes
1
answer
135
views
How can I tell if lighttpd is running on Debian 13? [closed]
My task was to port debian12 to debian13. In debian13 I noticed that the website was behaving differently with Perl v5.40.1. I found out that the following line returns different values on different ...
- 289
-1
votes
2
answers
94
views
How to use Perl `eval` to build a closure that executes the command in a string
In a CGI script that processes arrays of strings the user can supply for each field whether to match a string there or not.
If all user-specified criteria are fulfilled, the specific array should be ...
- 4,778
-3
votes
0
answers
145
views
Can user-supplied regular expressions be made safe in Perl? [duplicate]
I have a HTML search form that allows the user to input strings to search for.
For several reasons the strings the user enters are transformed to rather complex regular expressions, but the user-...
- 4,778
2
votes
1
answer
82
views
Disable Perl warnings for call to remote function
I'm defining some tests for a library I'm using. One of my tests is calling the code in such a way that it produces warnings, which is expected. However, I'd ideally like to suppress these warnings ...
- 509
0
votes
0
answers
74
views
Par:Packer: "Failed to execute temporary parl" when try to pack a .pl file to exe
I try to pack a .pl file to executable on windows,
I have strawberry-perl-5.40.2.1-64bit-portable and par:packer installed, also Tk is installed.
But it keep report error when execute pp -o a.exe a.pl
...
- 434
0
votes
1
answer
93
views
Packaging two scripts with system dependencies for NixOS deployment?
In my quest to get to know Nix and NixOS better, I'm going to try moving a small utility I have onto my NixOS server. There are two components to this utility:
A Perl script, which requires both (a) ...
- 15.1k