DL item_name array

//String (comma separated)
function() {
   var items = {{dlv - ecommerce}}.items;
   var itemNames = [];
   var i;
   if (!items) {
     return;
   }
   for (i = 0; i < items.length; i++) {
     if (items[i].item_name) {
       itemNames.push(items[i].item_name);
     }
   }
   return itemNames.join(',');
 }

 //Array
function() {
   var items = {{dlv - ecommerce}}.items;
   var itemNames = [];
   var i;
   if (!items) {
     return;
   }
   for (i = 0; i < items.length; i++) {
     if (items[i].item_name) {
       itemNames.push(items[i].item_name);
     }
   }
   return itemNames;
 }