哪一个比较好

var stringValue="good game well play";
var position=new Array();
var pos=stringValue.indexOf("e");
while(pos>-1 )
{
       position.push(pos);
       pos=stringValue.indexOf("e",pos+1);

}
alert(position);

var stringValue="good game well play";
var position=new Array();
var pos=stringValue.indexOf("e");
while(pos>-1&&pos<stringValue.length )
{
       position.push(pos);
       pos=stringValue.indexOf("e",pos+1);

}
alert(position);