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POUsing HTML::TreeBuilder::XPath on nested information
 

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    <p>Imagine an HTML page that is a report with repetitive structure:</p> <pre><code>&lt;html&gt; &lt;body&gt; &lt;h1&gt;Big Hairy Report Page&lt;/h1&gt; &lt;div class="customer"&gt; &lt;div class="customer_id"&gt;001&lt;/div&gt; &lt;div class="customer_name"&gt;Joe Blough&lt;/div&gt; &lt;div class="customer_addr"&gt;123 That Road&lt;/div&gt; &lt;div class="customer_city"&gt;Smallville&lt;/div&gt; &lt;div class="customer_state"&gt;Nebraska&lt;/div&gt; &lt;div class="order_info"&gt; &lt;div class="shipping_details"&gt; &lt;ul&gt; &lt;li&gt;Large crate&lt;/li&gt; &lt;li&gt;Fragile&lt;/li&gt; &lt;li&gt;Express&lt;/li&gt; &lt;/ul&gt; &lt;/div&gt; &lt;div class="order_item"&gt;Deluxe Hoodie&lt;/div&gt; &lt;div class="payment"&gt;35.95&lt;/div&gt; &lt;div class="order_id"&gt;000123456789&lt;/div&gt; &lt;/div&gt; &lt;div class="comment"&gt;StackOverflow rocks!&lt;/div&gt; &lt;/div&gt; &lt;div class="customer"&gt; &lt;div class="customer_id"&gt;002&lt;/div&gt; .... and so forth for a list of 150 customers </code></pre> <p>This kind of report page appears often. My goal is to extract each customer's related information into some reasonable data structure using <a href="https://metacpan.org/module/HTML%3a%3aTreeBuilder%3a%3aXPath" rel="nofollow"><code>HTML::TreeBuilder::XPath</code></a>.</p> <p>I know to do the basics and get the file read into $tree. But how can one concisely loop through that tree and get associated clusters of information per each customer? How, for example, would I create a list of address labels sorted by customer number based on this information? What if I want to sort all my customer information by state?</p> <p>I'm not asking for the whole perl (I can read my file, output to file, etc). I just need help understanding how to ask HTML::TreeBuilder::XPath for those bundles of related data, and then how to dereference them. If it's easier to express this in terms of an output statement (i.e., Joe Blough ordered 1 Deluxe Hoodie and left 1 comment) then that's cool, too. </p> <p>Thank you very much for those of you who tackle this one, it seems a bit overwhelming to me.</p>
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    1. COWow-thanks so much - the hard problem now is to decide which answer to upvote! Thanks for the fast responses, Gangabass, Borodin, and ikegami.
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