GDirections is asynchronous.  A request is fired off to Google and
javascript execution continues.  You have only one gdir object which
gets trampled on by the next loop iteration.  Ages later, one of the
gdir results comes back (not necessarily the first one fired off) and
nobody knows what they're doing to whom.

You've some homework to do on asynchronous programming :)

Also you need to know that there are speed limits on the rate at which
you can fire requests to Google.

All this is in Mike's ever useful econym tutorial

cheers, Ross K
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