clearOverlays() in V3

There is no clearOverlays() in API v3. Some practices have been presented. I think this is the simpliest so far.

Push all the overlays in an array when created (as usual). Following code will clear both map and the array:

  while(overlays[0]){

   overlays.pop().setMap(null);

  }

pop() method of an array removes the last element of an array, and returns that element. 'while' keeps that happening as long as there are elements in the array. When overlays[0] does not exist anymore, the mission is completed and code will proceed.

Applied in the example of the previous post.