I have array object(x) that stores json (key,value) objects. I need to make sure that x only takes json object with unique key. Below, example 'id' is the key, so i don't want to store other json objects with 'item1' key.

```
x = [{"id":"item1","val":"Items"},{"id":"item1","val":"Items"},{"id":"item1","val":"Items"}]    

var clickId = // could be "item1", "item2"....
var found = $.inArray(clickId, x);  //
if(found >=0)
{
    x.splice(found,1);
}
else{
    x.push(new Item(clickId, obj)); //push json object
}

```