how to merge two json objects if keys are in numeric string and arrange in ascending order in javascript

Question

How to merge two json objects if their keys are in numering string and arrange in ascending order

let obj1 = {
'10' : "ten"
'2' : "two",
"30": "thirty
}


let obj2 = {
'4' : "four",
'5' : "five",
"1": "one"
}

   // output i want :

let res = {
"1": "one",
'2' : "two",
'4' : "four",
'5' : "five",
'10' : "ten"
"30": "thirty
}

Pompedup · Accepted Answer · 2022-11-18 00:50:59Z

1

Edit

It seems the spread already sort the keys so you just need it

let obj1 = {
  '10': "ten",
  '2': "two",
  "30": "thirty"
}


let obj2 = {
  '4': "four",
  '5': "five",
  "1": "one"
}

console.log({ ...obj1, ...obj2 })

Previous answer

Object.entries order the keys, you can then run Object.fromEntries and you have your object sorted

let obj1 = {
  '10': "ten",
  '2': "two",
  "30": "thirty"
}


let obj2 = {
  '4': "four",
  '5': "five",
  "1": "one"
}

console.log(Object.fromEntries(Object.entries({ ...obj1, ...obj2 })))

edited Nov 18, 2022 at 0:50

answered Nov 18, 2022 at 0:39

Pompedup

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1 Comment

Pompedup Over a year ago

My pleasure, I just edit my answer, I saw that you don't need to pass by the Object.fromEntries(Object.entries()) part

Ryan Wilson · Accepted Answer · 2022-11-18 00:42:56Z

1

You can simply iterate the key/values of obj2 and place them into obj1 and it will order itself.

let obj1 = {
"10": "ten",
"2": "two",
"30": "thirty"
}


let obj2 = {
"4": "four",
"5": "five",
"1": "one"
}

for (const [key, value] of Object.entries(obj2)) {
    obj1[key] = value;
}
console.log(obj1);

answered Nov 18, 2022 at 0:42

Ryan Wilson

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