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Prototype from() Method

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This method clones an existing array or creates a new one from an array-like collection.

This is an alias for the $A() method.

Syntax:

Array.from(iterable)  ;

Return Value:

Example:

<html>
<head>
<title>Prototype examples</title>
   <script type="text/javascript" 
   src="/javascript/prototype.js">
   </script>
<script>

function showOptions(){
   var NodeList = $('employees').getElementsByTagName('option');
   var nodes = Array.from(NodeList);

   nodes.each(function(node){
      alert(node.nodeName + ': ' + node.innerHTML);
   });
}
</script>
</head>

<body>

   <select id="employees" size="10" >
      <option value="5">Mohtashim, Mohd</option>
      <option value="8">Debi, Patnaik</option>
      <option value="1">Madisetti, Praveen</option>
   </select>
   <br />

   <input type="button" value="Show the options" 
             onclick="showOptions();"/>

</body>
</html>

To understand it in better way you can Try it yourself.


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