sammy-partial()

[...]
      wrapped_callback = function(response) {
        var new_content = response,
            all_content =  "";
        $.each(data_array, function(i, idata) {
          // extend the data object with the context
//---------------------------------------
// dpree:
// the following line eats some of my data, e.g.: {"items": myItems}
//---------------------------------------
          $.extend(idata, context);
//---------------------------------------
// dpree:
// i don't know for what the sammy-context is needed, but maybe we could do instead sth. like:
// $.extend(idata, {"___context___": context});
//---------------------------------------
          if ($.isFunction(engine)) {
            new_content = engine.apply(context, [response, idata]);
          } 
          // collect the content
          all_content += new_content;
          // if callback exists call it for each iteration
          if (callback) { 
            // return the result of the callback 
            // (you can bail the loop by returning false)
            return callback.apply(context, [new_content, i]); 
          }
        });
        if (!callback) { context.swap(all_content); }
        context.trigger('changed');
      };
[...]