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function countCSSRules() {
    var results = '',
        log = '';
    if (!document.styleSheets) {
        return;
    }
    for (var i = 0; i < document.styleSheets.length; i++) {
        countSheet(document.styleSheets[i]);
    }
    function countSheet(sheet) {

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Perl meets Modern Web UI

Web Frameworks for the client such as Backbone, Knockout, and Angular have changed how we build web applications¹. Rendering's on the client² now. How do you take advantage of that? Do you want to take advantage of that?

In this talk I'll walk you through an example web application that sends a skeletal UI over the wire to the browser, then builds grid and detail views using JavaScript, out of data returned over a API implemented in Perl.

---

1. Except that WebVan was doing this back in 2001.

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// Assuming that you have JQuery and Underscore in your global namespace
// you have an array of strings you want to convert to an XML document
function toXML(data) { // data = ['string'(, ...)]
    var s = '', $xml;
    // build an empty structure
    // <items><item/><item/>...</items> 
    // yes, this is string concatenation, 
    // but we control the vocabulary
    _(this.length).times(function() { s = s + '<item/>'; });
    s = '<items>' + s + '</items>';

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Writing out the initial model data as a JSON object in a SCRIPT literal can leave you open to a cross-site scripting/injection attack.

To mitigate against this risk, use the OWASP guideline for bootstrapping an application with JSON data.

Write the HTML-escaped JSON inside of a hidden div, then fetch the contents of the div and parse it using JSON.parse.

<div style="display: none;">
!= $data
</div>

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(function foo() {
  var a, b;
  a = b = 1;
})(window);

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Experiments in revision control:  Curry recipe.

My personal recipe for Japanese curry, which has mutated over the years and is
now open-source thanks to github, hot damn.  Some of the ingredients are not
very Japanese, but curry came to Japan from England which got it from India to
begin with, so whatever.

1.5 - 2 lbs. of meat, prefer thin-sliced beef (komagire), pork works, too.
  Thin-sliced stuff is always best, but in a pinch stewing beef works.  Bacon
  works surprisingly well.  Chicken will work, technically, but if you must,

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Experiments in revision control:  Curry recipe.

My personal recipe for Japanese curry, which has mutated over the years and is
now open-source thanks to github, hot damn.  Some of the ingredients are not
very Japanese, but curry came to Japan from England which got it from India to
begin with, so whatever.

1.5 - 2 lbs. of meat, prefer thin-sliced beef (komagire), pork works, too.
  Thin-sliced stuff is always best, but in a pinch stewing beef works.  Bacon
  works surprisingly well.  Chicken will work, technically, but if you must,