javascript - 将键值对转换为所需对象的数组

Question

我有一个 JSON，其键值对为:

      let countByView= {
          "count1": "0",
          "count2": "230",
          "count3": "246",
          "count4": "172",
          "view1": "2017",
          "view2": "2018",
          "view3": "2019",
          "view4": "2020"
        }

我想变成它

 let countByView=
        [
          {
            "count1": 0,
            "view1": 2017
          },
          {
            "count1": 230,
            "view1": 2018
          },
          {
            "count1": 246,
            "view1": 2019
          },
          {
            "count1": 172,
            "view1": 2020
          }
        ]

我尝试使用下面的代码，但没有得到预期的结果，因为我无法正确转换。请让我知道是否有更好的解决方案..

  let result = Object.keys(countByView).map(e => {
        let ret = {};
        ret[e] = obj[e];
        return ret;
    });

console.log(result);

Answer 1

您可以对具有数字的同名对象使用哈希表。

var countByView = { count1: "0", count2: "230", count3: "246", count4: "172", view1: "2017", view2: "2018", view3: "2019", view4: "2020" },
    hash = Object.create(null),
    result = Object.keys(countByView).reduce(function (r, k) {
        var [ , key, value] = k.match(/^(\D+)(\d+)$/);
        if (!hash[value]) {
            r.push(hash[value] = {});
        }
        hash[value][key] = countByView[k];
        return r;
    }, []);

console.log(result);