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<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JS Bin</title>
</head>
<body>
  
</body>
</html>
 
     var g = {};
function storeUrl(urlArray)
  {
      if (!(urlArray instanceof Array)) urlArray=[urlArray]; //now you can pass single url also
 
      for (var i = 0; i < urlArray.length; i++)
      {
          if (!g.hasOwnProperty(urlArray[i]))
              
              {
                  g[urlArray[i]] = urlArray[i];
              }
           
          //... do whatever with g..
      }
             
  }
              
              
              storeUrl(['aa','bb']);
              storeUrl('aa');
              console.log(g);
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anonymouspro
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