How to access a global variable in a closure? (Javascript)

Question

            var events = <?php echo $sf_data->getRaw('jsonData'); ?>;//some perfecly fine json
            var locations = new Array();
            var geocoder = new google.maps.Geocoder();
            $(events).each(function(i,e){
                geocoder.geocode({address: e.place},function(results,statusCode){
                    locations[e.id] = results[0].geometry.location;
                })
            })
            alert(locations.length);

Okay, the question is easy. How do i modify the locations array inside of closure? The alert shows 0.

You access it exactly the way you re. However, I don't see you define events, before you each() it. I think we need more code... — JAAulde
– JAAulde, Commented Aug 4, 2011 at 16:34

bjornd · Accepted Answer · 2011-08-04 16:35:21Z

4

The alert shows 0 because you modify locations asynchronously. Anonymous function where you modify locations will be called later then you show alert.

answered Aug 4, 2011 at 16:35

bjornd

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2 Comments

JAAulde Over a year ago

Is geocoder.geocode() async? If not, I see no async code in this posted example. (I don't know anything about the Google Maps API)

Itako Over a year ago

aw, snap. I forgot it's async. I guess that solves the problem, thanks

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