How to map an array to object

Question

Is there a built-in lodash function to take this:

let params = ['foo', 'bar', 'baz', 'zle'];
let newArray = [];

params.forEach((element, index) => {
  let key = "name" + index;
  newArray.push({ key: element })
});

console.log(newArray);

And expected output should be like this:

var object = {
  a: {
    name1: "foo",
    name2: "bar",
  },
  b: {
    name1: "baz",
    name2: "zle",
  }
}

What is the delimiter for `a` and `b` in output. i.e what is the deciding on where to break the array params. You can simply use `Object.assign()` to convert Array to object, But output on `params` will be single dimension object. Refer this https://stackoverflow.com/questions/4215737/convert-array-to-object — Abhinav Kulshreshtha, Aug 22 '19 at 06:29
Do you want an array of objects or a nested object as output? Are the keys consecutive alphabets or are `a` and `b` dummy keys? — adiga, Aug 22 '19 at 06:33
Your code suggests you want an array in newArray, but then in your expected output you show a nested object. — connexo, Aug 22 '19 at 06:54

Bob White · Answer 1 · 2019-08-22T06:56:38.560

2

May this help you. I know that you should provide more information that what do really want to implement. but i got an idea that might help you.

let params = ['foo', 'bar', 'baz', 'zle'];
const keys = ['a', 'b', 'c', 'd']

let data = {}

while(params.length){

  const [a, b] = params.splice(0, 2) 
  const key = keys.splice(0, 1)

  data[key] = {
      name1: a,
      name2: b,
    }

}

console.log(data)

output will be:

{
  a: {
    name1: "foo",
    name2: "bar",
  },
  b: {
    name1: "baz",
    name2: "zle",
  }
}

edited Aug 22 '19 at 06:56

answered Aug 22 '19 at 06:48

Bob White

733
5
20

2

Thanks for the help. I got the solution. – Priya Aug 23 '19 at 05:28

score 1 · Answer 2 · edited Nov 25 '19 at 07:23

1

I have solved the issue. Solution for this issue is

 let colLength = 4;

 let breakableArray = _.chunk(data, 4);

  breakableArray.forEach((arrayObject,key)=>{
    let object = new Object();
    for(let i = 0; i < colLength; i++) {
      object[i] = arrayObject[i] != undefined ? arrayObject[i] : "-";
    }  
    finalObject[key] = object;
  })

edited Nov 25 '19 at 07:23

Sebastian Kaczmarek

8,120
4
20
38

answered Aug 23 '19 at 05:38

Priya

88
9

score 1 · Answer 3 · answered Aug 23 '19 at 05:42

1

You can convert your array into Json like format that can be done like this

var jsonObj = {};
for (var i = 0 ; i < sampleArray.length; i++) {
jsonObj["position" + (i+1)] = sampleArray[i];
 }

answered Aug 23 '19 at 05:42

Vibhanshu Sharma

259
1
5

How to map an array to object

3 Answers3