通过下划线 js 将 json 个带有键的对象分组

Question

我有如下 JSON 对象，我试图通过第一组键来分组和推送这个对象。

main =  {"answer_options":{
            "1":{"1":"optical projection<\/p>\r\n","2":"optical mechanism projection<\/p>\r\n","3":"mechanical projection<\/p>\r\n","4":"all the above<\/p>\r\n"},
            "2":{"5":"Greenwich to the place<\/p>\r\n","6":"equator to the poles<\/p>\r\n","7":"equator to the nearer pole<\/p>\r\n","8":"equator to the nearer pole along the meridian of the place<\/p>\r\n","9":"none of these.<\/p>\r\n"}},
    "question":
            {"1":"The stereo plotting instruments are generally manufactured on the principle of<\/p>\r\n","2":"Latitude of a place is the angular distance from<\/p>\r\n"}
    };

我试图获得如下输出。任何人都可以提供帮助吗？

{"1" : 
        {{"1" : "The stereo plotting instruments are generally manufactured on the principle of<\/p>\r\n"},
        {"1":"optical projection<\/p>\r\n","2":"optical mechanism projection<\/p>\r\n","3":"mechanical projection<\/p>\r\n","4":"all the above<\/p>\r\n"}}, 
    {"2": 
        {{"2" : "Latitude of a place is the angular distance from<\/p>\r\n"},
        {"5":"Greenwich to the place<\/p>\r\n","6":"equator to the poles<\/p>\r\n","7":"equator to the nearer pole<\/p>\r\n","8":"equator to the nearer pole along the meridian of the place<\/p>\r\n","9":"none of these.<\/p>\r\n"}}
    }

Answer 1

您预期的输出格式并不是可取的（或常用的）格式。这是一种替代方法。您可以使用 for / in 遍历问题并将其与相应的答案选项匹配。

main = {
  "answer_options": {
    "1": {
      "1": "optical projection<\/p>\r\n",
      "2": "optical mechanism projection<\/p>\r\n",
      "3": "mechanical projection<\/p>\r\n",
      "4": "all the above<\/p>\r\n"
    },
    "2": {
      "5": "Greenwich to the place<\/p>\r\n",
      "6": "equator to the poles<\/p>\r\n",
      "7": "equator to the nearer pole<\/p>\r\n",
      "8": "equator to the nearer pole along the meridian of the place<\/p>\r\n",
      "9": "none of these.<\/p>\r\n"
    }
  },
  "question": {
    "1": "The stereo plotting instruments are generally manufactured on the principle of<\/p>\r\n",
    "2": "Latitude of a place is the angular distance from<\/p>\r\n"
  }
};

var newMain = {};
for (var key in main.question) {
  newMain[ key ] = [
      main.question[key],
      main.answer_options[key]
    ];
}

console.log(newMain);

通过下划线 js 将 json 个带有键的对象分组

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