Need to add values to javascript array dynamically

Question

I have a php function returning an array of map coordinates.

I am then trying to place them on a google map using

    for (var i=0; i<coords.length; i++) {
        var via = new google.maps.LatLng(coords[i][1], coords[i][2]);
    };

where via is lat and longs, and coords[i][1], coords[i][2] are pulled from a php array.

This method only writes the last value of the array onto the map when the function runs, i need it to produce the entire array.

Secondly i need to pull only the last value of the array and drop it into the variable "end" when the array is done its loop.

**** also have tried

  var via = [];
    for (var i=0; i<coords.length; i++) {
        via.push([new google.maps.LatLng(coords[i][1], coords[i][2])]);
    };

and

   var via = [];
    for (var i=0; i<coords.length; i++) {
        var viaPoints = new google.maps.LatLng(coords[i][1], coords[i][2]);
        via.push([viaPoints]);
    };

McGarnagle · Accepted Answer · 2013-06-16 02:52:04Z

3

The loop as written overwrites via each time, so you end up with the last value. Instead try adding the marker to the map inside the loop. (For the second part of your question, just set end=via after the loop is done.)

for (var i=0; i<coords.length; i++) {
    var via = new google.maps.LatLng(coords[i][1], coords[i][2]);

    // add marker to the map here, eg ....
    map.addOverlay(new GMarker(via));
};

var end = via;

(In case you're not aware, the Maps API site has some helpful examples.)

answered Jun 16, 2013 at 2:52

McGarnagle

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1 Comment

user1881482 Over a year ago

Thanks for the help, actually trying to make a route appear on a map with preexisting markers, just need to "print" array of the coordinates into another function. So via would print "56.112345, -8.999889", "8.9999787, 7.99765568", etc...... into text essentially. And then need the end point to be the last lat and long

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