How to create an object from one dimensional array and static string

Question

I want an object like

var obj = {
    "ABC" : { name: true, dob: true},
    "CDE" : { name: true, dob: true},
    "EFG" : { name: true, dob: true},
    "CBA" : { name: true, dob: true},
    "XYZ" : { name: true, dob: true},
}

currently I have only array of

var arr = ["ABC","CDE","EFG","CBA","XYZ"];

I have tried adding this with

newArray.push({
    key: arr[i],
    name: true,
    dob: true
});

var newObj = {}

newObj[i] = newArray;

but I am not able to pass this as an whole object to my code. when I stringify this it returns

output

{
    '0':"[{
        key: "ABC",
        name: true,
        dob: true
    },{
        key: "CDE",
        name: true,
        dob: true
    }]"
}

Your desired `obj` is invalid - there is no key for the inner object. — CertainPerformance, May 30 '18 at 06:06
An object is a collection of key-value pairs. You need a key and a value. If you want a non-string as a key, you'll need to use a Map instead. — CertainPerformance, May 30 '18 at 06:07

score 4 · Accepted Answer · answered May 30 '18 at 06:08

4

You can use Object.assign to create an object. Use spread operator and map to reiterate the array.

var arr = ["ABC", "CDE", "EFG", "CBA", "XYZ"];

var obj = Object.assign(...arr.map(o => ({[o]: {name: true,dob: true}})));
console.log(obj);

Another option is using reduce to convert the array into a valid object.

var arr = ["ABC", "CDE", "EFG", "CBA", "XYZ"];
var obj = arr.reduce((c, v) => Object.assign(c, {[v]: {name: true,dob: true}}), {});

console.log(obj);

answered May 30 '18 at 06:08

Eddie

26,593
6
36
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You are genius. Thank you so much. This worked for me :) – Kirankumar Dafda May 30 '18 at 06:15
Happy to help :) – Eddie May 30 '18 at 06:21
Hey, can you please tell me if what's that empty curl mean in your reduce function ? – Kirankumar Dafda Dec 04 '18 at 06:13
1

@KirankumarDafda the empty `{}` in the of reduce is the initial value. This means that the initial value is an empty object. – Eddie Dec 04 '18 at 06:14

score 1 · Answer 2 · answered May 30 '18 at 06:08

1

use Array.reduce

var arr = ["ABC","CDE","EFG","CBA","XYZ"];

var result = arr.reduce((a,c) => {
a[c] = {name: true, dob: true};
return a;
}, {});

console.log(result);

answered May 30 '18 at 06:08

Nikhil Aggarwal

28,197
4
43
59

1

Thank you so much for the quick help, but i have tried @Eddie solution and it worked for me, I'll still try your solution. and update you :) – Kirankumar Dafda May 30 '18 at 06:16
1

Reduce is working for me from both of you. Thanks again – Kirankumar Dafda May 30 '18 at 06:20

score 1 · Answer 3 · answered May 30 '18 at 06:10

1

var arr = ["ABC","CDE","EFG","CBA","XYZ"];

let obj = {};

arr.forEach(x=> {
  obj[x] = {
    name: true,
    dob: true
  }  
});

console.log(obj)

Loop thru the array, for each of the element, use it as key and add an object as the value

answered May 30 '18 at 06:10

Isaac

12,042
16
52
116

score 0 · Answer 4 · answered May 30 '18 at 06:56

0

This is another way in generating that output Object using JSON.parse()

var objStr = '{'
var arr = ["ABC", "CDE", "EFG", "CBA", "XYZ"], 
    propertyValue = ':{"name":true,"dob":true}'

  for (var x in arr) {
   if (x < arr.length - 1)
    objStr += '"' + arr[x] + '"' + propertyValue + ','
   else
    objStr += '"' + arr[x] + '"' + propertyValue
  }
  objStr += '}'

  
console.log(JSON.parse(objStr))

Hope this help you :)

answered May 30 '18 at 06:56

Bharath

335
2
8

As i was trying this for react native `JSON.parse` is not working for me. – Kirankumar Dafda May 30 '18 at 07:00
SyntaxError: JSON Parse error: Unexpected identifier "object" – Kirankumar Dafda May 30 '18 at 07:47
there object string that you are parsing might not be properly formatted, – Bharath May 30 '18 at 08:19

How to create an object from one dimensional array and static string

currently I have only array of

output

4 Answers4

This is another way in generating that output Object using JSON.parse()

Linked