pass string into object javascript

Question

I get the id of a li element and want to use the name to access that part of an object. I have tried to add the var selectionId which contains the name of the section I want, such as cars but i get an error. Is there a way?

Thanks.

$(document).ready(function() {
 $(".markerSelection").click(function() {
 var selectionId = $(this).attr("id");
 drop(selectionId);
 }); 
});
var markers = {
 shopping : [
 new google.maps.LatLng(52.26183, -7.11339),
 new google.maps.LatLng(52.26134, -7.11226),
 new google.maps.LatLng(52.26067, -7.11181),
 new google.maps.LatLng(52.26003, -7.11033)],
 cars : [
 new google.maps.LatLng(52.26183, -7.11339),
 new google.maps.LatLng(52.26134, -7.11226),
 new google.maps.LatLng(52.26067, -7.11181),
 new google.maps.LatLng(52.26003, -7.11033)] 
};
var iterator = 0; 
function drop(selectionId) {
 clearOverlays();
 for (var i = 0; i < markers.selectionId.length; i++) {
 setTimeout(function() {
 addMarker();
 }, i * 200);
 }
}

Answer 1

If you are trying to access an object property by a variable key, you need to use the array notation:

... markers[selectionId].length ...

markers.selectionId fails because it is equivalent to markers["selectionId"].

• Elliot Bonneville: What downvote? -innocent halo- [may or may not have removed downvote due to misinterpreting answer]