And of course here is the OXTV (Obligatory XML::Twig Version), using no variable except $_:

Update: jeffa noticed that this does not work with the CPAN version of XML::Twig, you will need the development version (3.10) to be able to chain the calls to set_content and to print (I changed set_content in this version to return the element). So with older versions you will need to do this: 

  $_->set_content( $_->text + 10);
  $_->print;

[download]
instead of being able to ncely chain method calls. How lame! ;--(

#!/usr/bin/perl -w
use strict;
use XML::Twig;

XML::Twig->new( twig_roots => { number => sub { $_->set_content( $_->t
+ext + 10)
                                                  ->print;
                                              }
                              },
                twig_print_outside_roots => 1,
              )
         ->parse( \*DATA);

__DATA__
<data>
    <fields>
     <field name="foo">
        <number>2</number>
        <required>Y</required>
      </field>
       <field name="bar">
        <number>1</number>
        <required>N</required>
      </field>
    </fields>
</data>

[download]

In reply to Re: Edit values in XML and Save? by mirod
in thread Edit values in XML and Save? by Cody Pendant

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.