how to create a multiple object value, if item is an arrary of arrays [[arr1],[arr2],[arr3,]-CodePudding

I have an object like this:

const objects = {
  Battery: {
    batteryDetailsKey: ["serial_no", "type", "part_no"],
    batteryDetailsVal: ["HJ3CA19347410218LJ98 151 QC", "Extended Range", "4P94-Q051"],
  },
  Modules: {
    moduleDetailsKey: ["serial_no", "part_no", "cell_count"],
    moduleDetailsVal: ["8367532735006109322258160 50", "LJ98-10C779-A51", "32", "6"],
  },
};

I have written a function so that it becomes a key/val pair object

function twoArraysToObject(arr1, arr2) {
  return arr1.reduce((obj, item, index) => {
    obj[item] = arr2[index];
    return obj;
  }, {});
}

const desiredObject = {};
Object.keys(objects).forEach((key) => {
  const keyNamesArr = Object.keys(objects[key]);
  desiredObject[key] = twoArraysToObject(objects[key][keyNamesArr[0]], objects[key][keyNamesArr[1]]);
});

it does give me what i want with this data structure:

{
  "Battery": {
    "serial_no": "HJ3CA19347410218LJ98 151 QC",
    "type": "Extended Range",
    "part_no": "4P94-Q051"
  },
  "Modules": {
    "serial_no": "8367532735006109322258160 50",
    "part_no": "LJ98-10C779-A51",
    "cell_count": "32"
  }
}

However there's an issue in the code when moduleDetailsVal has multiple arrays rather than just 1 array with values:

const objects = {
  Battery: {
    batteryDetailsKey: ["serial_no", "type", "part_no"],
    batteryDetailsVal: ["HJ3CA19347410218LJ98 151 QC", "Extended Range", "4P94-Q051"],
  },
  Modules: {
    moduleDetailsKey: ["serial_no", "part_no", "cell_count"],
    moduleDetailsVal: [
        ["8367532735006109322258160 50", "LJ98-10C779-A51", "32", "6"],
        ["8367532735006109322258160 51", "LJ98-10C779-A52", "33", "6"],
        ["8367532735006109322258160 52", "LJ98-10C779-A52", "34", "6"],
    ]
  },
};

My code is only reading one moduleDetailsVal, but in reality it should read all of them, and there could be numerous amounts of Arrays inside moduleDetailsVal, not just 2 or 3

I ideally want it too look like this:

{
  "Battery": {
    "serial_no": "HJ3CA19347410218LJ98 151 QC",
    "type": "Extended Range",
    "part_no": "4P94-Q051"
  },
  "Modules": [
    {
      "serial_no": "8367532735006109322258160 50",
      "part_no": "LJ98-10C779-A51",
      "cell_count": "32"
    },
     {
      "serial_no": "8367532735006109322258160 51",
      "part_no": "LJ98-10C779-A52",
      "cell_count": "33"
    },
     {
      "serial_no": "8367532735006109322258160 52",
      "part_no": "LJ98-10C779-A53",
      "cell_count": "33"
    },

  ]
}

CodePudding user response：

In the reduce, change

obj[item] = arr2[index];

to:

obj[item] = Array.isArray(arr2[index])
      ? arr2.map(a => a[index])
      : arr2[index]

So you'll have:

function twoArraysToObject(arr1, arr2) {
  return arr1.reduce((obj, item, index) => {
    obj[item] = Array.isArray(arr2[index])
      ? arr2.map(a => a[index])
      : arr2[index]
    return obj;
  }, {});
}

const desiredObject = {};
Object.keys(objects).forEach((key) => {
  const keyNamesArr = Object.keys(objects[key]);
  desiredObject[key] = twoArraysToObject(objects[key][keyNamesArr[0]], objects[key][keyNamesArr[1]]);
});

CodePudding user response：

You can achieve it in a very simple way by using Array.map() and .forEach() method :

const modules = {
  moduleDetailsKey: ["serial_no", "part_no", "cell_count"],
  moduleDetailsVal: [
    ["8367532735006109322258160 50", "LJ98-10C779-A51", "32", "6"],
    ["8367532735006109322258160 51", "LJ98-10C779-A52", "33", "6"],
    ["8367532735006109322258160 52", "LJ98-10C779-A52", "34", "6"],
  ]
};

const res = modules.moduleDetailsVal.map((arr) => {
  const obj = {};
    modules.moduleDetailsKey.forEach((key, index) => {
        obj[key] = arr[index]
    });
  return obj;
});

console.log(res);

Just for Demo purpose, I worked on modules array so that it will give you the way how to achieve it.