How do you exchange data among different modules of your Angular JS application?

Question

I have a group of array in $scope.firstorder. For example:

Based on some condition like array contains an element Quantity. If Qunatity is zero i need to remove this array from the list of arrays.

How can I do that?

 for (index in $scope.firstorder)
    {
        var quantity = $scope.firstorder[index][0].Quantity;
        if (quantity == 0)
        {
            Remove the array element from $scope.firstOrder;
        } 


    }