How to dynamically add card to stack?

I'm creating an initial stack of cards and want to add a new card at the bottom of the stack to replace a card that has been thrown out. Is there a way of achieving this?

Here is the function I'm using. Currently cards are being added at the top of the stack. Using `$scope.stack.push` instead of `unshift` also produces the same result.

``` JavaScript
$scope.addCard = function(name) {
$scope.stack.unshift({
'name': name
});
};
```