javascript - 将对象与数组中的对象进行比较并替换键匹配的值

Question

我有一个对象和一组对象。我想将数组中的所有对象与单个硬编码对象进行比较，然后替换对象属性匹配的一些值。

单个硬编码对象描述了完整的数据集在正确时应该是什么样子。每个属性的值为 null。如果该属性与单个属性中的任何属性匹配，则应将该值替换为数组中任何对象的值。

// single object (hard coded)

var completeDataSet = {
  jan: null,
  jan;prognosis: null,
  feb: null,
  feb;prognosis: null,
  mar: null,
  mar;prognosis: null,
  apr: null,
  apr;prognosis: null,
  may: null,
  may;prognosis: null,
  jun: null,
  jun;prognosis: null,
  jul: null,
  jul;prognosis: null,
  aug: null,
  aug;prognosis: null,
  sep: null,
  sep;prognosis: null,
  oct: null,
  oct;prognosis: null,
  nov: null,
  nov;prognosis: null,
  dec: null,
  dec;prognosis: null
}

对象数组可能看起来像这样:

//Array of objects with missing properties
var data = [{
  jan: 0.258,
  jan;prognosis: false,
  feb: 15.256,
  feb;prognosis: false,
  apr: 0.0156,
  apr;prognosis: true,
  oct: 1.235,
  oct;prognosis: true,
  nov: 3.587,
  nov;prognosis: false
},{
  feb: 12.154,
  feb;prognosis: true,
  apr: 1.015,
  apr;prognosis: true,
  sep: 0.235,
  sep;prognosis: false,
  oct: 15.201,
  oct;prognosis: true,
  nov: 12.158,
  nov;prognosis: false,
  dec: 125.152,
  dec;prognosis: true
}];

我希望最终结果看起来像这样:

var correctArrayOfData = [{
  jan: 0.258,
  jan;prognosis: false,
  feb: 15.256,
  feb;prognosis: false,
  mar: null,
  mar;prognosis: null,
  apr: 0.0156,
  apr;prognosis: true,
  may: null,
  may;prognosis: null,
  jun: null,
  jun;prognosis: null,
  jul: null,
  jul;prognosis: null,
  aug: null,
  aug;prognosis: null,
  sep: null,
  sep;prognosis: null,
  oct: 1.235,
  oct;prognosis: true,
  nov: 3.587,
  nov;prognosis: false,
  dec: null,
  dec;prognosis: null
},{
  jan: null,
  jan;prognosis: null,
  feb: 12.154,
  feb;prognosis: true,
  mar: null,
  mar;prognosis: null,
  apr: 1.015,
  apr;prognosis: true,
  may: null,
  may;prognosis: null,
  jun: null,
  jun;prognosis: null,
  jul: null,
  jul;prognosis: null,
  aug: null,
  aug;prognosis: null,
  sep: 0.235,
  sep;prognosis: false,
  oct: 15.201,
  oct;prognosis: true,
  nov: 12.158,
  nov;prognosis: false,
  dec: 125.152,
  dec;prognosis: true
}]

正如你所看到的，如果键匹配，我就填写了值，并将不匹配的 props 和值保留为 null。

你能帮我解决这个问题吗？

谢谢!

Answer 1

使用预期结果作为模板，然后将属性分配给数组 CorrectArrayOfData。

var data = [{  jan: 0.258,  'jan;prognosis': false,  feb: 15.256,  'feb;prognosis': false,  apr: 0.0156,  'apr;prognosis': true,  oct: 1.235,  'oct;prognosis': true,  nov: 3.587,  'nov;prognosis': false},{  feb: 12.154,  'feb;prognosis': true,  apr: 1.015,  'apr;prognosis': true,  sep: 0.235,  'sep;prognosis': false,  oct: 15.201,  'oct;prognosis': true,  nov: 12.158,  'nov;prognosis': false,  dec: 125.152,  'dec;prognosis': true}];
var template = {  jan: null,  'jan;prognosis': null,  feb: null,  'feb;prognosis': null,  mar: null,  'mar;prognosis': null,  apr: null,  'apr;prognosis': null,  may: null,  'may;prognosis': null,  jun: null,  'jun;prognosis': null,  jul: null,  'jul;prognosis': null,  aug: null,  'aug;prognosis': null,  sep: null,  'sep;prognosis': null,  oct: null,  'oct;prognosis': null,  nov: null,  'nov;prognosis': null,  dec: null,  'dec;prognosis': null};

var correctArrayOfData = data.map(o => Object.assign(Object.assign({}, template), o));
console.log(correctArrayOfData);

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