如何将数据从一个对象插入到另一个不同结构对象以生成第三个对象

Question

我试图从一个对象中提取数据并将该数据插入到另一个对象中，但这两个对象具有不同的结构。和它的非常大的物体，超过3000行。

我需要在object1中检查dictionary[0].key.mcp[0]是否存在，如果它存在于object2 conv[0].mcp中，我需要在object1 dictionary[0].dicts中插入4种语言:德语、瑞典语、中文和日语，如果它不存在，则什么也不做

我想也许使用for循环我就能完成任务，但问题是在某些情况下，在键下面，值mcp会为另一个键而改变。

对象1

dictionary = [
  {
    "key": {
      "mcp": [
        "mcp.empty"
      ]
    },
    "dicts": {
      "english": "",
      "german": ""
    },
    "context": null,
    "tags": [],
    "edited": "2016-10-27T15:41:31.000Z"
  },
  {
    "key": {
      "mcp": [
        "ui.controls.plasmacontrol.feeder"
      ]
    },
    "dicts": {
      "english": "Feeder",
      "german": "Förderer"
    },
    "context": null,
    "tags": [],
    "edited": "2016-10-27T15:41:31.000Z"
  },

对象2

var conv = [
    {
        "mcp": "mcp.empty",
        "english": "",
        "german": "",
        "Swedish": "",
        "chinese": "",
        "japanese": ""
    },
    {
        "mcp": "ui.controls.plasmacontrol.feeder",
        "english": "Feeder",
        "german": " Förderer ",
        "Swedish": "Transportör",
        "chinese": "送粉器",
        "japanese": "粉末供給装置"
    },
    {
        "mcp": "ui.controls.plasmacontrol.feeder1",
        "english": "Feeder 1",
        "german": "Förderer 1 ",
        "Swedish": "Transportör 1",
        "chinese": "1号送粉器",
        "japanese": "粉末供給装置1"
    },

预期的结果是一个将所有数据从object1插入到object2的对象。

对象3(预期结果)

 dictionary = [
      {
        "key": {
          "mcp": [
            "mcp.empty"
          ]
        },
        "dicts": {
         "english": "",
            "german": "",
            "Swedish": "",
            "chinese": "",
            "japanese": ""
        },
        "context": null,
        "tags": [],
        "edited": "2016-10-27T15:41:31.000Z"
      },
      {
        "key": {
          "mcp": [
            "ui.controls.plasmacontrol.feeder"
          ]
        },
        "dicts": {
          "english": "Feeder 1",
            "german": "Förderer 1 ",
            "Swedish": "Transportör 1",
            "chinese": "1号送粉器",
            "japanese": "粉末供給装置1"
        },
        "context": null,
        "tags": [],
        "edited": "2016-10-27T15:41:31.000Z"
      },

到现在为止，我有这个，并返回了一些错误

import dictionary from "./dictionary.mjs";
import conv from "./converted.mjs";
import _ from "lodash";
import fs from "fs";
import util from 'util';


const newObject = _.map(dictionary, dictionaryItem => {
   const key = _.get(dictionaryItem, "key.mcp[0]", "")
   const isPresent = _.find(conv, { "mcp": key })
   if(isPresent) {
     /*  console.log('se hizo') */
      return { ...dictionaryItem, dicts: { 
             "english": isPresent.english,
            "german": isPresent.german,
            "Swedish": isPresent.Swedish,
            "chinese": isPresent.chinese,
            "japanese": isPresent.japanese
         } 
      }
  } else {
/*    console.log('no') */
         return dictionary
  }
})  

try {
   const data = fs.writeFileSync('./final.js', util.inspect(newObject, {showHidden: false, depth: null}));
   //file written successfully
 } catch (err) {
   console.error(err)
 }

Answer 1

在要执行操作的位置使用lodash First import

import _ from "lodash"
  or
const _ = require("lodash")

和

const newObject = _.map(dictionary, dictionaryItem => {
   const key = _.get(dictionaryItem, "key.mcp[0]", "")
   const isPresent = _.find(conv, { "mcp": key })
   if(isPresent) {
      return { ...dictionaryItem, dicts: { 
             "english": isPresent.english,
            "german": isPresent.german,
            "Swedish": isPresent.Swedish,
            "chinese": isPresent.chinese,
            "japanese": isPresent.japanese
         } 
      }
  } else {
         return dictionary
  }
})  

天哪，你得到你想要的结果了