javascript - 根据属性和 javascript 中的计数按对象数组分组

Question

我有一个对象数组 temp。我想根据对象的属性进行分组。例如，要对性别进行分组，并计算其计数。

const temp = [
  {
    properties: {
      "id":1234,
      "gender": 'male',
      "status": "Active"
    }
  },
  {
    properties: {
      "id":1456,
      "gender": 'male',
      "status": "Not Active"
    }
  },
  {
    properties: {
      "id":1377,
      "gender": 'female',
      "status": "Active"
    }
  },
  {
    properties: {
      "id":8799,
      "gender": 'female',
      "status": "Active"
    }
  }
];

需要分组的props可以像这样传递

groupFunc = (data) => {
  const metrics = data
  for (i = 0; i < temp.length; i++) {
    data.map( el => 
      temp[i].properties.el ? grouped.push([{"key": el, "value": temp[i].properties.el,"count":1}])
      :
      null
    )
    console.log(temp[i].properties)
  }
};
groupFunc(["gender","status"]);

分组累加后的最终结果应该是

grouped = [
  [
    {
      "key": "gender",
      "value": "male",
      "count": 2
    },
    {
      "key": "gender",
      "value": "female",
      "count": 2
    }
  ],
  [
    {
      "key": "status",
      "value": "Active",
      "count": 3
    },
    {
      "key": "status",
      "value": "Not Active",
      "count": 1
    },
  ]

]

Answer 1

const temp = [{properties:{"id":1234,"gender":'male',"status":"Active"}},{properties:{"id":1456,"gender":'male',"status":"Not Active"}},{properties:{"id":1377,"gender":'female',"status":"Active"}},{properties:{"id":8799,"gender":'female',"status":"Active"}}];

const groupByKeys = (data, keys) => {
  let finalResult = keys.map(key => {
    return Object.values(data.reduce((result, obj)=>{
      let objKey = obj["properties"][key]
      result[objKey] = result[objKey] || {key: key, count: 0, value: objKey};
      result[objKey].count += 1;
      return result
    },{}))
  })
  return finalResult
}

console.log(groupByKeys(temp, ["gender", "status"]))