Setting Viewport on Google Maps when sending several addresses -

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i have code send several addresses google maps. however, since i'm doing a series of geocodings, how can make viewport @ least center , zoom correctly on group?

function dobatchgeocodeandsearch() { $('#loading').css('visibility', 'visible');  var lines = $('#styled').val().split('\n');  for(var = 0;i < lines.length;i++){     geocoder.geocode( { 'address': lines[i]}, function(results, status) {     if (status == google.maps.geocoderstatus.ok) {         map.fitbounds(results[0].geometry.viewport);          // map.setcenter(bounds.getcenter(),         // map.getboundszoomlevel(bounds));         map.setcenter(results[0].geometry.location);

remove map.setcenter call. last call map.fitbounds show markers, if there 1 marker, zoom in close though, may want handle specially.

var bounds = new google.maps.latlngbounds(); for(var = 0;i < lines.length;i++){   geocoder.geocode( { 'address': lines[i]}, function(results, status) {     if (status == google.maps.geocoderstatus.ok) {       bounds.extend(results[0].geometry.location);       map.fitbounds(bounds);

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