Array from JSON returns undefined when array[0]

I have a JSON file with labels and values and jQuery code like that:

JSON:

[
  {"label":"One","value":"oneval"},
  {"label":"Two","value":"twoval"},
  {"label":"Three","value":"threeval"}
]

JS

    $.getJSON(file.json, function (data) {
      $.each(data, function (key, val) {
        array[key] = { label: val.label, value: val.value };
      }
    }

And after that when I use console.log(array) it shows Array[], but console.log(array[0]) shows undefined. Why? How can I get data from that array?