ElasticSearch result transformer example

es_result_transformer.js

var data = [],
    now = new Date().getTime();

root.hits.hits.forEach(function(hit) {
  var d = new Date(), 
      ts = hit.fields.expired_at_de * 1000;
      
  d.setTime(ts);

  var diffInHours = (now - ts) / 1000.0 / 60.0 / 60.0;
  data.push(d.toString() + " [expiring in " + diffInHours + " hours]");
});

return data;