按字符串数组过滤嵌套的对象数组

Question

晚上好

不知道有没有人能帮帮我，我好像在兜圈子我正在尝试通过另一个字符串数组从数组中获取包含 key/field "type" 的所有对象。

{
  "someData": [
    {
      "date": "someDate",
      "someNestedData": [
        {
          "id": "1",
          "type": "type1",
          "dateCreated": "someDate"
        },
        {
          "id": "2",
          "type": "type2",
          "dateCreated": "someDate"
        }
      ]
    },
      {
      "date": "someDate",
      "someNestedData": [
        {
          "id": "3",
          "type": "type1",
          "dateCreated": "someDate"
        },
        {
          "id": "4",
          "type": "type4",
          "dateCreated": "someDate"
        }
      ]
    }

  ]
}

和另一个字符串数组const types = ['type1', 'type2]` 我正在尝试过滤掉数组，以便过滤掉类型数组中不包含键的任何对象。

所以最终结果会是

{
  "someData": [
    {
      "date": "someDate",
      "someNestedData": [
        {
          "id": "1",
          "type": "type1",
          "dateCreated": "someDate"
        },
        {
          "id": "2",
          "type": "type2",
          "dateCreated": "someDate"
        }
      ]
    },
      {
      "date": "someDate",
      "someNestedData": [
        {
          "id": "3",
          "type": "type1",
          "dateCreated": "someDate"
        },
      ]
    }

  ]
}

我尝试了一些类似

的方法

data.someData.someNestedData.indexOf(function (i) {
  return types.indexOf(i.type);
})

以及其他一些臃肿的方法，只是不正确并正在寻找性能相当好的东西。 TIA :)

Answer 1

你可以这样做：

const types = ['type1', 'type2'];
const res = [
    {
      "date": "someDate",
      "someNestedData": [
        {
          "id": "1",
          "type": "type1",
          "dateCreated": "someDate"
        },
        {
          "id": "2",
          "type": "type2",
          "dateCreated": "someDate"
        }
      ]
    },
      {
      "date": "someDate",
      "someNestedData": [
        {
          "id": "3",
          "type": "type1",
          "dateCreated": "someDate"
        },
        {
          "id": "4",
          "type": "type4",
          "dateCreated": "someDate"
        }
      ]
    }
]
// map over the array
.map(obj => ({
     // rebuild the object 
     ...obj, 
     // but replace "someNestedData" with the list of element that has the 'type' filed included in types
     someNestedData: obj.someNestedData.filter(
          el => types.includes(el.type)
     )
}))
console.log(res)

按字符串数组过滤嵌套的对象数组

Filtering nested array of objects by array of strings

javascript

arrays

mapping

filtering

object