Prototype remove() Method

Syntax:

hash.remove(key1, key2...) ;

Return Value :

Returns the resultant merged hash.

Example:

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

function showResult(){

  var h = new Hash({ a:'apple', b:'banana', c:'coconut' });
  alert("Before removing elements : " + h.inspect() );
  
  // Remove two elements.
  h.remove('a', 'c');

  alert("After removing elements : " + h.inspect() );
}

</script>
</head>

<body>

  <p>Click the button to see the result.</p>
  <br />
  <br />
  <input type="button" value="Result" onclick="showResult();"/>

</body>
</html>

If you have version 1.5 then to understand it in better way you can Try it yourself.