JS排序不是函数

Question

我目前正在尝试对对象进行排序，尽管我遇到了data.sort is not a function错误。

我从以下 StackOverflow 答案中获得灵感：通过单击标题标签对表格进行排序，无论它是数字、字母或日期。

我还浏览了其他问题，但尚未设法解决我的问题，因为它往往会导致其他问题，例如值是undefined.

这是我的对象：

{
    "2010-01": {
        "item1": 324,
        "item2": 1075,
        "item3": 940,
        "item4": 441,
        "item5": 1040,
        "item6": 898,
        "item7": 1343
    },
    "2011-02": {
        "item1": 295,
        "item2": 958,
        "item3": 904,
        "item4": 434,
        "item5": 1038,
        "item6": 793,
        "item7": 1246
    },
    "2012-03": {
        "item1": 314,
        "item2": 1062,
        "item3": 980,
        "item4": 494,
        "item5": 1158,
        "item6": 914,
        "item7": 1461
    },
    "2008-04": {
        "item1": 336,
        "item2": 1022,
        "item3": 987,
        "item4": 488,
        "item5": 1014,
        "item6": 792,
        "item7": 1382
    },
    "2007-05": {
        "item1": 332,
        "item2": 1073,
        "item3": 1002,
        "item4": 512,
        "item5": 1104,
        "item6": 840,
        "item7": 1368
    },
    "2005-06": {
        "item1": 311,
        "item2": 981,
        "item3": 837,
        "item4": 432,
        "item5": 1002,
        "item6": 801,
        "item7": 1265
    },
    "2014-07": {
        "item1": 321,
        "item2": 1049,
        "item3": 921,
        "item4": 489,
        "item5": 963,
        "item6": 881,
        "item7": 1340
    },
    "2015-08": {
        "item1": 294,
        "item2": 1071,
        "item3": 960,
        "item4": 506,
        "item5": 910,
        "item6": 885,
        "item7": 1312
    },
    "2016-09": {
        "item1": 281,
        "item2": 1020,
        "item3": 952,
        "item4": 502,
        "item5": 1068,
        "item6": 914,
        "item7": 1397
    },
    "2009-10": {
        "item1": 319,
        "item2": 1058,
        "item3": 985,
        "item4": 546,
        "item5": 1184,
        "item6": 1031,
        "item7": 1448
    },
    "2005-11": {
        "item1": 300,
        "item2": 1021,
        "item3": 967,
        "item4": 474,
        "item5": 1176,
        "item6": 1009,
        "item7": 1387
    },
    "2017-12": {
        "item1": 307,
        "item2": 1027,
        "item3": 924,
        "item4": 427,
        "item5": 1024,
        "item6": 844,
        "item7": 1300
    }
}

我的排序功能，目前我只是通过尝试按升序或降序对第一项进行排序来开始。

function sortData(key, data, type) {
        if (key === "item1") {
          if (type === "asc") {
            data.sort(function(a, b) {
              return a[key] > b[key];
            });
          } else {
            data.sort(function(a, b) {
              return a[key] < b[key];
            });
          }
        }
        return data;
      }

这data是对象，我试图像这样传递它：sortData('item1', [data], 'asc');而不是只是data但没有运气。如果有人能阐明我做错了什么，那就太好了。

Answer 1

问题是数据不是数组，而 sort 是数组方法。您可以使用Object.keys来获取键的数组，对其进行排序，然后使用 a 填充值forEach：

let unsorted_data = { "2010-01": { "item1": 324, "item2": 1075, "item3": 940, "item4": 441, "item5": 1040, "item6": 898, "item7": 1343 }, "2011-02": { "item1": 295, "item2": 958, "item3": 904, "item4": 434, "item5": 1038, "item6": 793, "item7": 1246 }, "2012-03": { "item1": 314, "item2": 1062, "item3": 980, "item4": 494, "item5": 1158, "item6": 914, "item7": 1461 }, "2008-04": { "item1": 336, "item2": 1022, "item3": 987, "item4": 488, "item5": 1014, "item6": 792, "item7": 1382 }, "2007-05": { "item1": 332, "item2": 1073, "item3": 1002, "item4": 512, "item5": 1104, "item6": 840, "item7": 1368 }, "2005-06": { "item1": 311, "item2": 981, "item3": 837, "item4": 432, "item5": 1002, "item6": 801, "item7": 1265 }, "2014-07": { "item1": 321, "item2": 1049, "item3": 921, "item4": 489, "item5": 963, "item6": 881, "item7": 1340 }, "2015-08": { "item1": 294, "item2": 1071, "item3": 960, "item4": 506, "item5": 910, "item6": 885, "item7": 1312 }, "2016-09": { "item1": 281, "item2": 1020, "item3": 952, "item4": 502, "item5": 1068, "item6": 914, "item7": 1397 }, "2009-10": { "item1": 319, "item2": 1058, "item3": 985, "item4": 546, "item5": 1184, "item6": 1031, "item7": 1448 }, "2005-11": { "item1": 300, "item2": 1021, "item3": 967, "item4": 474, "item5": 1176, "item6": 1009, "item7": 1387 }, "2017-12": { "item1": 307, "item2": 1027, "item3": 924, "item4": 427, "item5": 1024, "item6": 844, "item7": 1300 } };

function sortData(key, data, type) {
  let ordered = {};
  let compareFunction = function(a, b) {
    return data[b][key] - data[a][key];
  };
  if (type === "asc") {
    compareFunction = function(a, b) {
      return data[a][key] - data[b][key];
    }
  }
  Object.keys(data).sort(compareFunction).forEach(function(key) {
    ordered[key] = data[key];
  });
  return ordered;
}


console.log(sortData("item1", unsorted_data, 'asc'));

您仍然可以为 asc 和 desc 传递自定义比较函数。为了sort，但为了简单起见，我省略了它。