I have a function in `angularJS` that uses `find` to check if an item exists in an array;

```
function matchCartItem(item) {
    return $scope.cart[0].cart_items.find(function(itm) {
        return itm.item_id === item.item_id
    });
}

```

As you can see I pass an `item` to the function then i check if the `item_id` of the passed `item` can be found in the `items` in the `cart_items` array

This works great but now I want to modify it.

`cart_items` has an inner array `cart_modifier_items`
. When a `cart_item` is passed it contains `cart_modifier_items`. My function at the moment only checks for matching `cart_item`

How can I change this function to also check the `cart_modifier_items`?

So I want to check for matching `item.item_id` in `$scope.cart[0].cart_items` -- my function does this

But also check for matching `item.cart_modifier_item[i] in`$scope.cart[0].cart\_items[i].cart\_modifier\_items`where`i`is like looping through all the`cart\_items`

Any help/guidance appreciated

Data structure of **item**

```
cart_item: [
    {
      "id": 159,
      "item_id": 20,
      "name": "Empanadas (Choice of 2)",
      "description": "Choice of Diced Beef; Spinach, Stilton and Onion; or Smoked Ham and Mozzarella",
      "price": 700,
      "available": 1,
      "created_at": "2016-01-31 16:50:31",
      "updated_at": "2016-01-31 16:50:31",
      "menu_category_id": 41,
      "restaurant_id": 11,
      "cart_modifier_items": [
          {
              "id": 34,
              "item_id": 29,
              "name": "Diced Beef",
              "price": 0,
              "created_at": "2016-02-01 01:04:08",
              "updated_at": "2016-02-01 01:04:08",
              "menu_modifier_group_id": 9,
              "restaurant_id": 11,
              "menu_item_id": 159
          },
          {
              "id": 35,
              "item_id": 10,
              "name": "Smoked Salmon & Mozzarella",
              "price": 0,
              "created_at": "2016-02-01 01:04:37",
              "updated_at": "2016-02-01 01:04:37",
              "menu_modifier_group_id": 9,
              "restaurant_id": 11,
              "menu_item_id": 159
          }
        ]
    }
]

```