Tutorials Point


  Learn Prototype
  Prototype Resources
  Selected Reading

Copyright © 2014 by tutorialspoint



  Home     References     Discussion Forums     About TP  

Prototype unset() Method


previous next AddThis Social Bookmark Button


Advertisements

This method deletes the hash's key property and returns its value. If it does not find that key in the hash then it does nothing and returns undefined.

Syntax:

hash.unset(key) ;

Return Value :

  • Returns value of the deleted key.

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' });
 // Returns 'apple'
 alert( "h.unset('a') : " +  h.unset('a') );

}

</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.



previous next Printer Friendly

Advertisements


  

Advertisements