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  <div class="vevent h-event"> <h1 class="summary p-name">clojerks: Data-driven web applications in ClojureScript</h1> <div class='date'><time class="dtstart dt-start" title="2012-06-20T19:00:00" datetime="2012-06-20T19:00:00">Wednesday, June 20, 2012 from 7</time>–<time class="dtend dt-end" title="2012-06-20T21:00:00" datetime="2012-06-20T21:00:00">9pm</time></div> <div class="location vcard p-location h-card"> <a class="url" href='http://calagator.org/venues/202393154'><span class='fn org p-name'>Simple</span></a> <div class="adr p-adr h-adr"> <div class="street-address p-street-address">1615 SE 3rd Ave, Suite 200</div> <span class="locality p-locality">Portland</span> , <span class="region p-region">OR</span> <span class="postal-code p-postal-code">97214</span> <div class="country-name p-country-name">US</div> (<a href='https://maps.google.com/maps?q=1615%20SE%203rd%20Ave,%20Suite%20200,%20Portland%20OR%2097214%20US'>map</a>) </div> </div> <div class="description p-description"> <p><a href="http://keminglabs.com/">Kevin Lynagh</a> will talk to us about data-driven web applications with ClojureScript:</p> <p><span>A web page or application is, at its core, just a visual representation of data that people can read, look at, and manipulate.</span> <span>Typically the mapping between the abstract data and elements on the screen is implicit in the code: take some piece of the data, do X here, do Y there; when the user clicks on that thing, modify the page here, and so on.</span></p> <p><span>Reasoning about such code is difficult: either control is inverted across many different callbacks with complected concerns, or one must endure a great deal of ceremony with models, controllers, view models, and views/templates to structure an application.</span> <span>Ideally when we build a web application all we should have to do is describe how our application's data should be represented on the DOM.</span> <span>We shouldn't need to worry about callbacks, twiddling the attributes of particular elements, or updating cached state.</span><br><br><span>As it turns out, ClojureScript's rich data structures and semantics allows us to easily write such simple, declarative code.</span> <span>I will discuss these ideas using examples from visualization-rich dashboard applications.</span><br><br><span>Recommended reading:</span><br><br><span>C2:</span> <a href="http://keminglabs.com/c2/">http://keminglabs.com/c2/</a><br><span>Knockout.js:</span> <a href="http://knockoutjs.com/">http://knockoutjs.com/</a><br><span>Rich Hickey's talk on the benefits of immutability:</span> <a href="http://www.infoq.com/presentations/Are-We-There-Yet-Rich-Hickey">http://www.infoq.com/presentations/Are-We-There-Yet-Rich-Hickey</a></p> </div> <h3>Links</h3> <ul> <li><a class="url u-url" href="http://www.meetup.com/clojerks/events/67939192/">Website</a></li> </ul> </div>