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# Prototype update() Method

This method updates hash with the key/value pairs of object. The original hash will be modified.

Duplicate keys will cause an overwrite of hash's keys. If it does not find a key then it will add it as a new key/value pair.

## Syntax:

    hash.update(object) ;

## Return Value :

- Returns a modified 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' });

     var t = h.update({a: 'amrood', d:'drum'});

     alert( "New Hash : " +  t.inspect() );

    }

    </script>
    </head>

    <body>

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

    </body>
    </html>

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

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