All Questions
8,464
questions
2
votes
2
answers
98
views
Test for Unicode properties on older versions of Perl
Unicode adds new properties to the Unicode database and these are added to later versions of Perl. I'd like to be able to est if a property is allowed on my current version of Perl.
I have tried
perl -...
- 3,973
5
votes
1
answer
63
views
Perl's capture group disappears while in scope
I have very simple code that parses a file name:
#!/usr/bin/env perl
use 5.040;
use warnings FATAL => 'all';
use autodie ':default';
my $string = '/home/con/bio.data/blastdb/phytophthora....
- 6,065
1
vote
2
answers
96
views
How to use Perl to replace an entire line where a match is found?
I need to use Perl to replace an entire line if it has a match to a regular expression.
For example, if I have this file below:
Chicago no
Baltimore no
New York no
And I have a regex that returns ...
- 57
1
vote
1
answer
108
views
Perl unpack command works diffrently in Unix and Linux?
I am trying to use unpack logic of perl in unix and Linux, But see it sa huge diffrence when I iterate all the input binary string , Not sure how to solve the issue ??? or is platform related ???
$...
- 31
1
vote
2
answers
131
views
Is it possible to optionally match paired quotations marks (before and after a string)?
I'm trying to make a substitution in a file with a one liner regex. sed failed me so I turned to perl. I can for example match "setting = value # comment" and extract it in three parts "...
- 2,053
0
votes
2
answers
77
views
Whats wrong with `s/"((?:[^"]|\\")*)"//` parsing a C string in Perl?
It seems I'm sitting on my eyes, because I cannot find out whats wrong with my regular expression:
I'm trying to parse a C source file that contains strings within a line (actually those strings are ...
- 4,069
2
votes
2
answers
107
views
perl regex negative lookahead replacement with wildcard
Updated with real and more complicated task:
The problem is to substitute a certain pattern to different result with or without _ndm.
The input is a text file with certain line like:
/<random path&...
- 307
1
vote
2
answers
88
views
Substitute the ICON reference for nothing
On an export file of more than 2600 bookmarks from Firefox, I want to import them into Buku which seems to bug with the ICON in the html file.
So I want to substitute the ICON reference for nothing.
...
- 21
0
votes
3
answers
132
views
Perl Regex for converting query strings
I need to convert some Oracle query strings to be Postgres compatible. Some of the queries use the Oracle TO_NUMBER function which isn't valid in Postgres. So I need to remove all occurrences of the ...
- 79
-8
votes
1
answer
221
views
Regexp to remove small numbers and leave large ones [closed]
On text files with many paragraphs, sentences or phrases are numbered. I use regexp in Perl to remove those numbers. They are always followed by the first letter of the sentence/phrase or by a space....
- 457
1
vote
2
answers
108
views
Regex for deconstructing SQL where statement
Looking for a fancy regex to split partial SQL where statement. Legacy app is quite old and records below are manually entered, which allows for a lot of mistakes. Given below where code I need to ...
- 53
1
vote
1
answer
104
views
Combine 2 regex matches
I have 2 regex expressions which are capturing both instances of what I need. However, I need to combine them so I only have 1 regex. These are complicated to me, and I'm not exactly sure how to ...
- 203
-3
votes
1
answer
80
views
parse string by comma, but ignore comma's within quotes and parentheses
I'm trying to pull out all comma separated entries from strings but I'm having issues with some values that have comma's in quoted data, or within parentheses. I've tried to use Parse::CSV and Text::...
- 203
5
votes
3
answers
328
views
Regular expression for zero-width Unicode characters
I’m converting a table to a human-readable form, and I need to treat the content with zero-length Unicode characters “in a distinctive way”.
The only way to recognize them seems to be (even with Perl’...
- 1,381
2
votes
2
answers
87
views
How to embed s/\A{/LB/ in the EXPR of s{...}{EXPR}e?
I've read 'Quote and Quote-like Operators' in man perlop but can't figure out how to use s/.../EXPR/e if EXPR contains code which itself contains a substitution involving both \A and the outer ...
- 809