Re: Replace empty alt tag on <img> tag

You can use XML::LibXML:

#!/usr/bin/perl
use warnings;
use strict;

use XML::LibXML;

my $input = '<image href = "images/cron1.png"><alt></alt></image>';
my $dom = 'XML::LibXML'->load_xml(string => $input);
for my $alt ($dom->findnodes('//image/alt[not(text())]')) {
    $alt->parentNode->removeChild($alt);
}
print $dom;
[download]

or the less verbose wrapper XML::XSH2:

open file.xml ;
rm //image/alt[not(text())] ;
save :b ;
[download]

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

Comment on Re: Replace empty alt tag on <img> tag Select or Download Code

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Re^2: Replace empty alt tag on <img> tag by vlearner (Initiate) on Jan 20, 2022 at 12:06 UTC
can I do the same with regular expression??	[reply]
Re^3: Replace empty alt tag on <img> tag by choroba (Cardinal) on Jan 20, 2022 at 12:18 UTC
Generally, no. `map{substr$_->[0],$_->[1]\|\|0,1}[\\|\|{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^ARGV,3]`	[reply] [d/l]
Re^4: Replace empty alt tag on <img> tag by The Perlman (Scribe) on Jan 20, 2022 at 16:42 UTC
Generally yes, at least since Perl regex are turing complete The real question should be: Is it possible with a simple regex? Answer: No. A regex parsing HTML wouldn't be less complex than a full scale HTML parser and consist of various nested sub expressions. Certainly not a one liner. - Ron	[reply]
Re^5: Replace empty alt tag on <img> tag by Fletch (Bishop) on Jan 20, 2022 at 19:32 UTC
Re^5: Replace empty alt tag on <img> tag by Anonymous Monk on Jan 20, 2022 at 18:25 UTC
Re^3: Replace empty alt tag on <img> tag -- dont use a regex by Discipulus (Canon) on Jan 20, 2022 at 12:17 UTC
> can I do the same with regular expression?? no, Why a regex really isn't good enough for HTML and XML, even for "simple" tasks here at the monastery only tybalt89 owns a special permission to deal with HTML or XML using regular expressions L* There are no rules, there are no thumbs.. Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.	[reply] [d/l]
Re^4: Replace empty alt tag on <img> tag -- dont use a regex by eyepopslikeamosquito (Archbishop) on Jan 20, 2022 at 22:23 UTC
> here at the monastery only tybalt89 owns a special permission to deal with HTML or XML using regular expressions Agreed that tybalt89 has earned it. To nitpick though, I think TheDamian is also worthy of this special permission. The PPR module provides a single regular expression that defines a set of independent subpatterns suitable for matching entire Perl documents -- from PPR by TheDamian (as if you couldn't guess ;-) See also these comments by kcott and haukex, discussing the differences between PPR and PPI.	[reply]
Re^5: Replace empty alt tag on <img> tag -- dont use a regex (honorary mention) by LanX (Saint) on Jan 21, 2022 at 00:03 UTC