Replace array in object with object in TypeScript

I have a huge JSON that I need to load. I’m trying to reduce the size of it by using arrays within the objects, but I don’t find a proper way to back-translate it in Typescript.

Instead of repeating the dates in every object of this array, I thought I use a column called "values" and use typescript to assign the dates again.

This is what I’m retrieving:

  const rows = [
    {
      'name': '100100',
      'description': 'Dummy 00',
      'hierarchy': ['Final_Hierarchy'],
      'id': 0,
      'values': [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0],
    }
  ];

  const columns = [
    '2022-09-18',
    '2022-09-25',
    '2022-10-02',
    '2022-10-09',
    '2022-10-16',
    '2022-10-23',
    '2022-10-30',
    '2022-11-06',
    '2022-11-13',
    '2022-11-20',
    '2022-11-27',
    '2022-12-04',
  ];

And this is what I need:

  const rows = [
    {
      'name': '100100',
      'description': 'Dummy 00',
      'hierarchy': ['Final_Hierarchy'],
      'id': 0,
      '2022-09-18': 0,
      '2022-09-25': 0,
      '2022-10-02': 0,
      '2022-10-09': 0,
      '2022-10-16': 0,
      '2022-10-23': 0,
      '2022-10-30': 0,
      '2022-11-06': 0,
      '2022-11-13': 0,
      '2022-11-20': 0,
      '2022-11-27': 0,
      '2022-12-04': 0,
    },
  ];

I tried this, but it returns "No index signature with a parameter of type ‘string’ was found on type ‘{}’".

var result = {};
  columns.forEach((key, i) => result[key] = rows.values[i]);

Does anyone have a solutions for this?

>Solution :

Your code has the good idea you just forgot that rows is an array and that you want to change the first item so try:

columns.forEach((key, i) => result[key] = rows[0].values[i]);