Question 200341 in Javascript Question posted in
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Javascript – how to create array of objects from 2 different array?

I have 2 arrays with different lengths and the number of items in each array is dynamic. I want to create the finalArray. How can I do that?
I want to add each item in array1 to all objects of array2 as key and an empty array as value.

 const array1 = [7665,7666]
 const array2 = [
{
    "id": 1,
    "name": "user-1",
},
{
    "id": 2,
    "name": "user-2", 
},
{
    "id": 3,
    "name": "user-3",
},
  ]

 const finalArray = [
    {
      7665: [],
      7666: [],
      users: 'user-1',
    },
    {
      7665: [],
      7666: [],
      users: 'user-2',
    },
    {
      7665: [],
      7666: [],
      users: 'user-3',
    }
  ]
Tags:

2

Answers


  1. 0

    Here you go:

    const array1 = [7665, 7666];
const array2 = [{
    "id": 1,
    "name": "user-1",
  },
  {
    "id": 2,
    "name": "user-2",
  },
  {
    "id": 3,
    "name": "user-3",
  },
];

const result = array2.map(({ id, name }) => ({ 
  ...array1.reduce((acc, cur) => ({ 
    ...acc, 
    [cur]: [] 
  }), {}), 
  users: name 
}))

console.log(result)

    The map creates one object per user from array2. The reduce converts each number in array1 to a key on the final user object.

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  2. 0

    try that

    const array1 = [7665, 7666];
const array2 = [{
    "id": 1,
    "name": "user-1",
  },
  {
    "id": 2,
    "name": "user-2",
  },
  {
    "id": 3,
    "name": "user-3",
  },
];
let finalArray = [];
for (let i = 0; i < array2.length; i++) {
  let obj = {};
  obj[array1[0]] = [];
  obj[array1[1]] = [];
  obj['users'] = array2[i].name;
  finalArray.push(obj);
}
console.log(finalArray);
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