javascript - 根据 JSON 的值和 JSON 数组的键合并一个 JSON 和 JSON 数组

Question

我想尝试通过组合这两个 JSON 和 JSON 数组在 Node 中创建一个 JSON 数组

`var template = {
    "key1": "value1",
    "key3": "value3",
    "key4": "value3",
    "key6": "Dummy Value1"
};
var data = [
  {
    "value1": "1",
    "value2": "2",
    "value3": "3"
  },
  {
    "value1": "11",
    "value2": "12",
    "value3": "13"
  },
  {
    "value1": "21",
    "value2": "22",
    "value3": "23"
  }
];`

我需要结果 JSON 是这样的

var result = [
  {
    "key1": "1",
    "key3": "3",
    "key4": "3",
    "key6": "Dummy Value1"
  },
  {
    "key1": "11",
    "key3": "13",
    "key4": "13",
    "key6": "Dummy Value1"
  },
  {
    "key1": "21",
    "key3": "23",
    "key4": "23",
    "key6": "Dummy Value1"
  }
]

在我的例子中，JSON 数组中大约有 40 个键，模板 JSON 中大约有 25 个键，所以我也在为此寻找优化的解决方案。任何人都可以帮助我吗？

Answer 1

使用Array#map和 Array#reduce方法。

// iterate over the array
var res = data.map(function(o) {
  // get the property names array and iterate to generate 
  // result object
  return Object.keys(template).reduce(function(obj, k) {
    // define property based on the array element object has 
    // the prefered property or not
    obj[k] = o.hasOwnProperty(template[k]) ? o[template[k]] : template[k];
    // return the object reference
    return obj;
    // set initial value as an empty object which is used as
    // the new array element 
  }, {});
});

var template = {
  "key1": "value1",
  "key3": "value3",
  "key4": "value3",
  "key6": "Dummy Value1"
};
var data = [{
  "value1": "1",
  "value2": "2",
  "value3": "3"
}, {
  "value1": "11",
  "value2": "12",
  "value3": "13"
}, {
  "value1": "21",
  "value2": "22",
  "value3": "23"
}];

var res = data.map(function(o) {
  return Object.keys(template).reduce(function(obj, k) {
    obj[k] = o.hasOwnProperty(template[k]) ? o[template[k]] : template[k];
    return obj;
  }, {});
});

console.log(res);