Having Trouble Clearing (deleting) Dynamically Created Polyline Before Displaying Another

I am having trouble clearing any existing polylines before displaying a new one. I've already tried more than 5 different methods (array length = 0, MVCArray clear, polylines.setMa

Solution 1:

hope this help

//global path
var path = null;

...

//create new polyline
var polyLine = new google.maps.Polyline({
    path: polylinesArray,
    strokeColor: routeInfoJSON.color,
    strokeOpacity: 0.8,
    strokeWeight: 5
});

//delete old
var prepath = path;
if(prepath){
    prepath.setMap(null);
}
//new polyline
polyLine.setMap(this.map);

// assign toglobal var path
path = polyLine;