使用减缩和扩展运算符JS返回附加属性？

Question

我正在使用下面的减少功能来计算一个球员名字被提到多少次，然后根据谁被提到的最少来列出他们。

我试图用我的对象返回第二个属性[`${value.subtitles[0].name} + ${index}`] : value.subtitles[0].url并对其进行排序。然而，这并不是正确的排序。当只返回第一个属性[value.title]: (acc[value.title] || 0) + 1,时，一切都按预期工作。但第二个属性使其排序不正确。它应该是基于标题属性值的排序，该属性值是一个整数，表示该播放机被提到多少次，从大多数到最少。为什么会发生这种情况？

谢谢你的帮助！

const players = [
  {
    "title": "Mike",
    "titleUrl": "https://mikegameplay",
    "subtitles": [
      {
        "name": "Mike Channel",
        "url": "https://channel/mike"
      }
    ]
  },
  {
    "title": "Cindy",
    "titleUrl": "https://cindy",
    "subtitles": [
      {
        "name": "Cindy Channel",
        "url": "https://channel/cindy"
      }
    ]
  },
  {
    "title": "Mike",
    "titleUrl": "https://mike",
    "subtitles": [
      {
        "name": "Mike Channel",
        "url": "https://channel/mike"
      }
    ]
  },
  {
    "title": "Haley",
    "titleUrl": "https://Haley",
    "subtitles": [
      {
        "name": "Haley Channel",
        "url": "https://channel/haley"
      }
    ]
  },
  {
    "title": "Haley",
    "titleUrl": "https://Haley",
    "subtitles": [
      {
        "name": "Haley Channel",
        "url": "https://channel/haley"
      }
    ]
  },
  {
    "title": "Haley",
    "titleUrl": "https://Haley",
    "subtitles": [
      {
        "name": "Haley Channel",
        "url": "https://channel/haley"
      }
    ]
  }
]

const counts = players.reduce((acc, value, index) => ({
   ...acc,
   [value.title]: (acc[value.title] || 0) + 1,
   [`${value.subtitles[0].name} + ${index}`] : value.subtitles[0].url
}), {});

const sortedValues = [];

for (const value in counts) {
    sortedValues.push([value, counts[value]]);
};

sortedValues.sort((a, b) => b[1] - a[1]);

console.log(sortedValues)

Answer 1

尝尝这个

var groupBy = function (xs, key) {
  return xs.reduce(function (rv, x) {
    (rv[x[key]] = rv[x[key]] || []).push(x);
    return rv;
  }, {});
};

var pl = groupBy(players, "title");
console.log(pl);

let sortable = [];
for (var item in pl) {
  sortable.push([item, pl[item].length, pl[item][0].subtitles[0].url]);
}

sortable.sort(function (a, b) {
  return b[1] - a[1];
});

console.log(JSON.stringify(sortable));

结果

[["Haley",3,"https://channel/haley"],["Mike",2,"https://channel/mike"],["Cindy",1,"https://channel/cindy"]]