Angularjs 按id为'的频繁国家/地区和所有国家/地区重复optgroup；s作为键，名称作为值 "data": { "Frequent": { "56": "Germany", "67": "Spain", "

按id为'的频繁国家/地区和所有国家/地区重复optgroup；s作为键，名称作为值

  "data": {
    "Frequent": {
      "56": "Germany",
      "67": "Spain",
      "74": "France",
      "76": "United Kingdom",
      "230": "United States of America",
      "": "Select Country"
    },
    "AllCountries": {
      "1": "Andorra",
      "2": "United Arab Emirates",
      "3": "Afghanistan",
      "4": "Antigua and Barbuda",
      "5": "Anguilla",
      "6": "Albania"
   }
}