How transform that array of objects?

Question

i have a problem.

I have that array of objects:

const iHaveThis = [{
    question: "What's your name?",
    answer: 'dda',
    form_filled_key: 15,
  },
  {
    question: "What's your e-mail?",
    answer: '[email protected]',
    form_filled_key: 15,
  },
  {
    question: "What's your e-mail?",
    answer: '[email protected]',
    form_filled_key: 14,
  },
  {
    question: "What's your name?",
    answer: 'DAS',
    form_filled_key: 14,
  },
];

I want transform it to:

const iWillHaveThis = [{
    "What's your e-mail?": '[email protected]',
    "What's your name?": 'dda',
  },

  {
    "What's your e-mail?": '[email protected]',
    "What's your name?": 'DAS',
  },
];

How can i make that ? Please

I already tried use reduce, map but not working.

Answer 1

You can make an object keyed to your form_filled_key. And in a loop add objects to the object using the key to group them. In the end, your solution will be in the Object.values() of the object you built:

const iHaveThat = [
  {question: "What's your name?",answer: 'dda',form_filled_key: 15,},
  {question: "What's your e-mail?",answer: '[email protected]',form_filled_key: 15,},
  {question: "What's your e-mail?",answer: '[email protected]',form_filled_key: 14,},
  {question: "What's your name?",answer: 'DAS',form_filled_key: 14,},];

let arr = iHaveThat.reduce((obj, {form_filled_key, question, answer}) => {

    // make a new entry if needed
    if (!obj[form_filled_key]) obj[form_filled_key] = {}

    // add the key value pair
    obj[form_filled_key][question] = answer

    return obj
},{})

// you just want the array from `values()`
let result = Object.values(arr)
console.log(result)