javascript - 从嵌套的对象数组递归更改特定属性

Question

我在尝试更改嵌套对象数组中特定 属性的值时遇到问题:

const myObj = [
    {
        "Description":"WA State",
        "Data":[
        {
            "Description":"Years",
            "Indicators":[
            {
                "Year":2018,
                "Points":25994,
                "Goal":"28000",
            }
            ]
        },
        {
            "Description":"Local Goal",
            "Indicators":[
            {
                "Year":2018,
                "Points":25994,
                "Goal":"28000",
            }
            ]
        },
        {
            "Description":"Remote Goal",
            "Indicators":[
            {
                "Year":2018,
                "Points":55857,
                "Goal":"84000",
            }
            ]
        }
        ]
    },

    {
        "Description":"NY State",
        "Data":[
        {
            "Description":"Years",
            "Indicators":[
            {
                "Year":2018,
                "Points":21953,
                "Goal":"26000",
            }
            ]
        },
        {
            "Description":"Local Goal",
            "Indicators":[
            {
                "Year":2018,
                "Points":24195,
                "Goal":"25000",
            }
            ]
        },
        {
            "Description":"Remote Goal",
            "Indicators":[
            {
                "Year":2018,
                "Points":80857,
                "Goal":"90000",
            }
            ]
        }
        ]
    }
]

在这里，我需要将 Year 属性的所有外观更改为 2017，并将 Goal 属性的所有外观更改为: 50000.

我正在考虑拥有一个对象数组，我可以在其中声明如下内容:

const newValues = [{property: 'Year', newValue: 2019}, {property: 'Goal', newValue: 50000}]

然后使用它来比较使用 filter 或 reduce 迭代对象的嵌套数组？有什么想法或建议吗？

Answer 1

要以递归方式执行此操作而不依赖于父键，您可以尝试组合使用 map 和 forEach。

const myObj = [
  {
    Description: "WA State",
    Data: [
      {
        Description: "Years",
        Indicators: [
          {
            Year: 2018,
            Points: 25994,
            Goal: "28000"
          }
        ]
      },
      {
        Description: "Local Goal",
        Indicators: [
          {
            Year: 2018,
            Points: 25994,
            Goal: "28000"
          }
        ]
      },
      {
        Description: "Remote Goal",
        Indicators: [
          {
            Year: 2018,
            Points: 55857,
            Goal: "84000"
          }
        ]
      }
    ]
  },

  {
    Description: "NY State",
    Data: [
      {
        Description: "Years",
        Indicators: [
          {
            Year: 2018,
            Points: 21953,
            Goal: "26000"
          }
        ]
      },
      {
        Description: "Local Goal",
        Indicators: [
          {
            Year: 2018,
            Points: 24195,
            Goal: "25000"
          }
        ]
      },
      {
        Description: "Remote Goal",
        Indicators: [
          {
            Year: 2018,
            Points: 80857,
            Goal: "90000"
          }
        ]
      }
    ]
  }
];

function parse(arr) {
  return arr.map(obj => {
    Object.keys(obj).forEach(key => {
      if (Array.isArray(obj[key])) {
        parse(obj[key]);
      }
      
      if (key === 'Year') {
        obj[key] = 2017;
      }
      
      if (key === 'Goal') {
        obj[key] = 50000;
      }
    })
    
    return obj;
  })
}

console.log(parse(myObj));