Question

我正在尝试展平包含在该对象内的对象的对象数组（但也可以包含更多对象）。结果格式应该只是对象数组。

现在是这样：

var array = [
  {
    nickname: "Johnny",
    first_name: "John",
    last_name: "Smith",
    info: {
      married: "yes",
      kids_ages: []
    }
  },
  {
    {
    nickname: "Ron",
    first_name: "Ronald",
    last_name: "Smith",
    info: {
      married: "no",
      kids_ages: []
    }
  },
  {
    nickname: "Johnny",
    first_name: "John",
    last_name: "Smith",
    info: {
      married: "yes",
      kids_ages: [17]
    },
    kids: {
      first_name: "Harry",
      last_name: "Smith
  }
 }
]

对于第一个条目应该是这样的：

{
  nickname: "Johnny",
  first_name: "John",
  last_name: "Smith",
  married: "yes"
  kids_ages: []
},

Answer 1

您可以从对象中取出info并将该对象与其余对象分配给单个对象。

var array = [{ nickname: "Johnny", first_name: "John", last_name: "Smith", info: { married: "yes", kids_ages: [] } }, { nickname: "Ron", first_name: "Ronald", last_name: "Smith", info: { married: "no", kids_ages: [] } }, { nickname: "Johnny", first_name: "John", last_name: "Smith", info: { married: "yes", kids_ages: [17] }, kids: { first_name: "Harry", last_name: "Smith" } }],
    flat = array.map(({ info, ...object }) => ({ ...object, ...info }));

console.log(flat);

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通过保留外部对象的键作为前缀的另一种方法。

function getFlat(object, parent) {
    return Object.assign({}, ...Object.entries(object).map(([k, v]) => {
        if (v && typeof v === 'object' && !Array.isArray(v)) {
            return getFlat(v, k);
        }
        return { [parent  + (parent && '_') + k]: v };
    }));
}

var array = [{ nickname: "Johnny", first_name: "John", last_name: "Smith", info: { married: "yes", kids_ages: [] } }, { nickname: "Ron", first_name: "Ronald", last_name: "Smith", info: { married: "no", kids_ages: [] } }, { nickname: "Johnny", first_name: "John", last_name: "Smith", info: { married: "yes", kids_ages: [17] }, kids: { first_name: "Harry", last_name: "Smith" } }],
    flat = array.map(o => getFlat(o));

console.log(flat);

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Answer 2

根据我的评论：尝试array.prototype.map，然后在每个对象array.prototype.reduce上。想想冲突。当孩子对象和父对象中有first_name时，最后一个对象应做什么。您要保留两个，最后一个，第一个，一些随机的吗？

例如：

const flat = arr => arr.map(element => 
  Object.entries(element).reduce((sum, [key, value]) => { 
    if (isObject(value)) {
      return {...sum, ...value}
      // or anything else to manage conflicts, depends on the way you want to handle it
    } 
  return {...sum, [key]: value }
}, {}))

协助展平对象中具有一个（或潜在大于1个）对象的数组

2 个答案: