update_results.js

function queryWikipedia(term) {
   var url = "http://en.wikipedia.org/w/api.php";
   var data = {action: 'opensearch', search: encodeURI(term)};
   return $.getAsObservable(url, data, 'jsonp');
}

function updateResults(items){
   var ul = $("#items");
   ul.html(_.map(items, function(item){
     return "<li>" + item + "</li>";
   }).join(""));
}