Possible Duplicate:

Array unique values

Get unique results from JSON array using jQuery

Im having a JSON string like this

[

 Object { id=38,product=foo},

 Object { id=38,product=foo},

 Object { id=38,product=foo},

 Object { id=39,product=bar},

 Object { id=40,product=hello},

 Object { id=40,product=hello}



]

There are duplicate values in this JSON array..how can i make this JSON array unique like this

[

 Object { id=38,product=foo},

 Object { id=39,product=bar},

 Object { id=40,product=hello}

]

.Im looking for a suggestion that uses less iterations,
Jquery $.inArray is not working in this case.

Suggestion to use any third party libraries are welcome.