Hi, all. I have code about DistanceMatrixService.getDistanceMatrix function
using
a external variable, listed as below:
// To call find_links, use:
// find_links(new Array()
// , [(25.0, 124.0)]
// , [[(25.1, 124.1), (25.2, 124.2), ...
], [(26.1, 124.1), ... ]]);
// The dest_group is an array of array of points; within it, the
length of an array of points
// would never exceed 25, the limit given by Google.
function find_links(links, origin, dest_group) {
var ll_o;
var ll_d;
var i;
var destinations;
for (i=0; i<dg.length; i++) {
destinations = dest_group[i];
ll_o = latLng([origin]);
ll_d = latLng(destinations);
measureDistance.getDistanceMatrix(
{
origins: ll_o,
destinations: ll_d,
travelMode: google.maps.TravelMode.DRIVING,
unitSystem: google.maps.UnitSystem.METRIC,
avoidHighways: false,
avoidTolls: false
}
, function(response, status){ approach_links(links,
origin, destinations, response, status); }
);
}
}
function approach_links(links, origin, destinations, response,
status) {
alert(destinations);
// , etc.
}
The problem is that when in approach_links it alerts, the variable
`destinations' always bound to
the last state of the variable `destinations' outer
of measureDistance.getDistanceMatrix call in find_links.
That is, it seems like variable used in callback closure refers to a static
external variable, doesn't it?
Any idea?
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