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Re^3: How to filter XML elements, exclude some

by poj (Parson)
on Sep 13, 2013 at 13:01 UTC ( #1053919=note: print w/replies, xml ) Need Help??

in reply to Re^2: How to filter XML elements, exclude some
in thread How to filter XML elements, exclude some

#!perl use strict; use XML::Twig; my $twig = new XML::Twig( twig_handlers => { 'item' => \&item } ); $twig->parsefile('in.xml'); $twig->set_pretty_print('indented'); $twig->print_to_file('out.xml'); sub item { my ($t,$e) = @_; for ($e->children){ $_->delete unless ($_->name =~ /^id|name$/); } }

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[Corion]: Nicholas Clark++ # read for a multichar block-delimiter by scanning for the last char, and only then check whether the whole delimiter was read.
[Corion]: At least if you're appending the data read to a larger buffer, this means you avoid the situation of "a delimiter was found but the other half has not been read yet"
choroba misses the context
[Corion]: choroba: Optimizing how Perl reads source code on startup (and then processes it line-by-line)
[Corion]: But in general, it seems to be an interesting approach I should think about - whenever I'm searching for something, to consider if I could search for the end of the token instead of the start of the token

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