array showing undefined outside the jquery post funtion

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Hello Friends

I am trying to get the data from database using $.post() it returns me data
I am again using $.post() inside the fist one
and i am trying to push that data in array inside second $.post()
array length is showing inside second $.post() but outside it it is showing length 0

Below is my code

JavaScript

$.post('/Common/getInfo/', null, function (data) {
    var desc = [];
    var ultlng =[];
    var count = 0;

    for (var i = 0; i < data.length; i++) {
        desc.push(data[i].Description);
        $.post('/Common/getLatlngInfo/', { id: data[i].ID }, function (data1) {

            for (var j = 0; j < data1.length; j++) {
                if (j == 0) {
                    ultlng.push(new google.maps.LatLng(data1[j].Latitude, data1[j].Longitude));
                }

                if (data1.length > 1) {
                    if (j == data1.length - 1) {
                        var flightPlanCoordinates = [
                                    new google.maps.LatLng(data1[0].Latitude, data1[0].Longitude),
                                    new google.maps.LatLng(data1[1].Latitude, data1[1].Longitude),
                                    new google.maps.LatLng(data1[2].Latitude, data1[2].Longitude),
                                    new google.maps.LatLng(data1[3].Latitude, data1[3].Longitude),
                                    new google.maps.LatLng(data1[4].Latitude, data1[4].Longitude)
                        ];
                        var flightPath = new google.maps.Polyline({
                            path: flightPlanCoordinates,
                            geodesic: true,
                            strokeColor: '#007ACC',
                            strokeOpacity: 1.0,
                            strokeWeight: 3
                        });

                        flightPath.setMap(map);
                    }
                }
                else {
                    ultlng.push(new google.maps.LatLng(data1[j].Latitude, data1[j].Longitude));
                }
            }
        });
    }

    for (var i = 0; i < desc.length; i++) {
        marker = new google.maps.Marker({
            map: map,
            position: ultlng[i]
        });

        (function (i, marker) {
            google.maps.event.addListener(marker, 'click', function () {

                if (!infowindow) {
                    infowindow = new google.maps.InfoWindow();
                }

                infowindow.setContent("<html><body><div style="min-height:50px; max-width: 200px;">" + data[i].Description + "</div></body></html>");
                infowindow.open(map, marker);
            });

        })(i, marker);
    }
});

getting ultlng[] array length as 0 it should be 5
as 5 five elements are pushed into it

but outside $post() it is showing o lenght

Please get me solution for this,

Thanks in advance

Posted 3-Dec-14 20:43pm

pRaNaY_.net

Updated 3-Dec-14 22:27pm

v3

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Kornfeld Eliyahu Peter 4-Dec-14 3:18am

Not clear. Which length should be 0 or not zero. You have data, data1 and desc that you check for length, where is the problem?
Did you used debugger to check what actually your code does?

pRaNaY_.net 4-Dec-14 4:28am

ultlng[] length should be 5 but it is showing me 0

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Kornfeld Eliyahu Peter · Answer 1 · 2014-12-03T22:53:00

In JavaScript variable has scope[^] of global or local (without var it is global, with var it is local)...
ultlng is a variable scoped to the $post method and do not exists outside it...
You may change your code like this: