Can someone tell me just by looking what this code does, and which brackets refer to functions or dynamic objects? Taken from http://gerger.co/blog/2011/02/17/google-maps-api-v3-location-search-with-jquery-autocomplete-plugin/

gistfile1.js

 $(document).ready(function(){

  var mapOptions = {
       zoom: 10,
       mapTypeId: google.maps.MapTypeId.ROADMAP,
       center: new google.maps.LatLng(41.06000,28.98700)
     };

  var map = new google.maps.Map(document.getElementById("map"),mapOptions);

  var geocoder = new google.maps.Geocoder();  

     $(function() {
         $("#searchbox").autocomplete({
         
           source: function(request, response) {

          if (geocoder == null){
           geocoder = new google.maps.Geocoder();
          }
             geocoder.geocode( {'address': request.term }, function(results, status) {
               if (status == google.maps.GeocoderStatus.OK) {

                  var searchLoc = results[0].geometry.location;
               var lat = results[0].geometry.location.lat();
                  var lng = results[0].geometry.location.lng();
                  var latlng = new google.maps.LatLng(lat, lng);
                  var bounds = results[0].geometry.bounds;

                  geocoder.geocode({'latLng': latlng}, function(results1, status1) {
                      if (status1 == google.maps.GeocoderStatus.OK) {
                        if (results1[1]) {
                         response($.map(results1, function(loc) {
                        return {
                            label  : loc.formatted_address,
                            value  : loc.formatted_address,
                            bounds   : loc.geometry.bounds
                          }
                        }));
                        }
                      }
                    });
            }
              });
           },
           select: function(event,ui){
      var pos = ui.item.position;
      var lct = ui.item.locType;
      var bounds = ui.item.bounds;

      if (bounds){
       map.fitBounds(bounds);
      }
           }
         });
     });   
 });