Prototype - from() Method

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

Returns an array having all the elements from the passed selector.

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>

Output

prototype_array_processing.htm