Re: Introduction to anonymous arrays and hashes

I'm assuming this is related to a markup language such as HTML or XML.

I'm unsure whether you are using the data to create a document or if you are extracing the data from a document. If one of these, I would suggest you use one of the HTML:: or XML:: modules on CPAN. There may be others with which I'm unfamiliar; XML::LibXML is the only one that I have a reasonable working knowledge of.

In terms of how you might use anonymous arrays and hashes, behind the <readmore> is a script which creates a data structure to represent the following HTML fragment (and prints the content of the <em> element).

<html lang="en">
    <head>
    </head>
    <body>
        <h1>Heading1</h1>
        <p id="para1" class="first-para">This is <em>emphasied</em>. A
+nd this is not.</p>
    </body>
</html>
[download]

Note: This code is for illustrative purposes only - I am not suggesting you include it in an application.

use strict;
use warnings;

my $ra_web_page = [
    {
        type        => 'tag',
        element     => 'html',
        attributes  => {
            lang    => 'en',
        },
        content     =>  [
            {
                type        => 'tag',
                element     => 'head',
                attributes  => {
                },
                content     => [
                ],
            },
            {
                type        => 'tag',
                element     => 'body',
                attributes  => {
                },
                content     => [
                    {
                        type        => 'tag',
                        element     => 'h1',
                        attributes  => {
                        },
                        content     => [
                            {
                                type    => 'string',
                                value   => 'Heading 1',
                            },
                        ],
                    },
                    {
                        type    => 'tag',
                        element => 'p',
                        attributes  =>  {
                            id      => 'para1',
                            class   => 'first-para',
                        },
                        content     => [
                            {
                                type    => 'string',
                                value   => 'This is ',
                            },
                            {
                                type        =>  'tag',
                                element     => 'em',
                                attributes  => {
                                },
                                content     => [
                                    {
                                        type    => 'string',
                                        value   => 'emphasised',
                                    },
                                ],
                            },
                            {
                                type    => 'string',
                                value   => '. And this is not.',
                            },
                        ],
                    },
                ],
            },
        ],
    },
];

my $em_text = $ra_web_page->[0]{content}[1]{content}[1]{content}[1]{co
+ntent}[0]{value};

print "EM text = $em_text\n";
[download]

This has probably raised further questions. Ask away.

Regards,

PN5

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