Add description property to Number objects : prototype « Object Oriented « JavaScript DHTML

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JavaScript DHTML » Object Oriented » prototype

Add description property to Number objects


  



<html>

<head>

  

  <script type="text/javascript">

     

    Number.prototype.description = null;



    slHighway = new Number(65);

    slHighway.description = "Interstate Highway Speed Limit";



    function tellDifference(num1) {

      document.write(num1.description);

    }

  </script>

</head>

<body>

  <script type="text/javascript">

    tellDifference(slHighway);

  </script>

</body>

</html>

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