gistfile1.txt

var count, elem, i, input, len;

input = [
  {
    "creative_carousel_image": null,
    "creative_carousel_name": null,
    "creative_carousel_description": null,
    "creative_carousel_link": null,
    "creative_carousel_message": null,
    "creative_dpa_product_name": "asdasd",
    "creative_dpa_description_price": "asdasd",
    "creative_dpa_message": "asdasd"
  }, {
    "creative_carousel_image": null,
    "creative_carousel_name": null,
    "creative_carousel_description": null,
    "creative_carousel_link": null,
    "creative_carousel_message": null,
    "creative_dpa_product_name": "asdasd",
    "creative_dpa_description_price": "asdasda",
    "creative_dpa_message": "asdasd"
  }, {
    "creative_carousel_image": null,
    "creative_carousel_name": null,
    "creative_carousel_description": null,
    "creative_carousel_link": null,
    "creative_carousel_message": null,
    "creative_dpa_product_name": "asdasd",
    "creative_dpa_description_price": "asdasd",
    "creative_dpa_message": "asdasd"
  }, {
    "creative_carousel_image": null,
    "creative_carousel_name": null,
    "creative_carousel_description": null,
    "creative_carousel_link": null,
    "creative_carousel_message": null,
    "creative_dpa_product_name": "asdasd",
    "creative_dpa_description_price": "asdasda",
    "creative_dpa_message": "asdasd"
  }, {
    "creative_carousel_image": null,
    "creative_carousel_name": null,
    "creative_carousel_description": null,
    "creative_carousel_link": null,
    "creative_carousel_message": null,
    "creative_dpa_product_name": "asdasd",
    "creative_dpa_description_price": "asdasd",
    "creative_dpa_message": "asdasdasd"
  }, {
    "creative_carousel_image": null,
    "creative_carousel_name": null,
    "creative_carousel_description": null,
    "creative_carousel_link": null,
    "creative_carousel_message": null,
    "creative_dpa_product_name": "asdasd",
    "creative_dpa_description_price": "asdasda",
    "creative_dpa_message": "asdasdasd"
  }
];

count = 0;

for (i = 0, len = input.length; i < len; i++) {
  elem = input[i];
  count = count + _.compact(_.toArray(elem)).length;
}

console.error(count);