arrays - 如何在js中从数组中删除元素[元素来自mongodb]

Question

以下是我的数组，

[
  {
    "key_id": "#K000030",
    "_id": "K000030",
    "isMaster": true,
    "specialties": [
        {
            "speciality1_count": "x039",
            "speciality1": "Infectious Disease"
        }
    ]
},
{
    "key_id": "#K000442",
    "_id": "K000442",
    "keyword": "Artificial Heart Ventricle",
    "isMaster": true,
    "specialties": [
        {
            "speciality1_count": "x011",
            "speciality1": "Cardiothoracic Surgery"
        },
        {
            "speciality2_count": "x041",
            "speciality2": "Interventional Cardiology"
        }
    ]
}

该字段来自mongoDb我在模型中声明了每个文件。这里我想删除数组中的“isMater”和“_id”。

resp.forEach(function(v,k){
    if (v) {
      delete v.isMaster;
      delete v._id;
    }
});

但它没有被删除。我不知道我在哪里犯了错误。请帮忙。

Answer 1

使用array.map() JavaScript 函数可以做到这一点。

所以代码将是:

array.map(function(item) {
  delete item._id;
  delete item.isMaster;
  return item;
});

下面是完整的工作代码:

let array = [{"key_id":"#K000030","_id":"K000030","isMaster":true,"specialties":[{"speciality1_count":"x039","speciality1":"Infectious Disease"}]},{"key_id":"#K000442","_id":"K000442","keyword":"Artificial Heart Ventricle","isMaster":true,"specialties":[{"speciality1_count":"x011","speciality1":"Cardiothoracic Surgery"},{"speciality2_count":"x041","speciality2":"Interventional Cardiology"}]}];

array.map(function(item) {
  delete item._id;
  delete item.isMaster;
  return item;
});

console.log(array);