gistfile1.js

// Translate our messages into expand directives.
var messageDirectives = $.map(ajaxResult, formatMessage);

// Replace the dashboard placeholder with a newly cloned
// DOM node copied from #message-template and expanded
// with our messages.
$("#dashboard .placeholder").
  replaceWith(
      $("#messages-template").
        expand(messageDirectives));
                     
// Interpolate the most recent message directly into
// the existing sidebar element
$("#sidebar .latest-message").
  expandInPlace(messageDirectives[0]);