javascript - 将对象数组的值映射到对象属性

Question

如何将对象值数组转换为对象属性？我想把这个转过来

const array = [
  {
    "age_group": [
      {
        "range": "0-20",
        "total_count": 100
      },
      {
        "range": "21-30",
        "total_count": 200
      },
    ],
    "machine": {
      "name": "SK2DS0011",
    }
  }
]

进入此

[{name: "SK2DS0011", "0-20": 100, "21-30": 200}]

我一直坚持使用reduce。

temp_arr = ori.reduce((accum, arr, i) => {
  return accum['abc'] = arr.age_data.map(o => ({[o.range]: o.count}))
},{})

也许我在reduce中使用了错误的map。

Answer 1

您可以使用array#map来生成对象数组。对于每个 age_group，您可以使用 array#map、展开语法和 Object.assign()创建范围和total_count对象。您可以使用 array_reduce 生成所有范围的总和。

const array = [{ "age_group": [{ "range": "0-20", "total_count": 100 }, { "range": "21-30", "total_count": 200 }, ], "machine": { "name": "SK2DS0011", } }],
      result = array.map(({age_group, machine}) => {
        const {name} = machine;
        const obj = Object.assign(...age_group.map(({range, total_count}) => ({[range] : total_count})));
        const total = age_group.reduce((s,o) => s + +o.total_count, 0);
        return {name, ...obj, total};
      });
console.log(result);