Copyright © tutorialspoint.com
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.
hash.unset(key) ; |
<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.
Copyright © tutorialspoint.com