Merging two json objects in Java script?

Question

Have u merged two jsons in javascript ??

Problem:

a={id:123,name:john,status:success};
b={id:123,status:inprocess,transId:245};

Output json should be like

{id:123,name:john,status:success,transId:245};

All the values from a should override the ones in b and also the uncommon key/values should appear in output json.

I tried out some recursive options but cudnt acheive the output.

That's not JSON, that is Javascript objects. JSON is a test format for representing objects. — Guffa, Feb 26 '13 at 11:20
It's been asked so many times: http://stackoverflow.com/questions/4154712/javascript-extending-an-object-question http://stackoverflow.com/questions/10430279/javascript-object-extending http://stackoverflow.com/questions/5585168/javascript-extending-object-with-multiple-properties — oleq, Feb 26 '13 at 11:22
Hi oleq, i tried those links but cudnt achieve the needed result.I was careful to already search the stack before asking — Krithika Vittal, Feb 26 '13 at 11:38

score 6 · Accepted Answer · edited Jun 20 '20 at 09:12

6

your a and b variable are not valid json.

<script>
//change your a and b variable to this.
 a={id:123,name:'john',status:'success'}; 
 b={id:123,status:'inprocess',transId:245};
$(document).ready(function(){

  $.extend(a,b);

});
</script>

and a will have structure like

{
    id: 123
    name: "john"
    status: "inprocess"
    transId: 245
 
}

I've used jquery api

update.

without jquery

   a={id:123,name:'john',status:'success'}; 
   b={id:123,status:'inprocess',transId:245};

  extend(a,b);

where extend function is:

 function extend(a, b){
    for(var key in b)
        if(b.hasOwnProperty(key))
            a[key] = b[key];
    return a;
 }

ref1 ,ref2 , ref3

edited Jun 20 '20 at 09:12

Community

1
1

answered Feb 26 '13 at 11:24

Manish Mishra

12,163
5
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Are you using a library there? – John Zwinck Feb 26 '13 at 11:25
Hi Manish, now it leaves out the properties in b and updates only the ones in a. – Krithika Vittal Feb 26 '13 at 11:43
wow, if you want b also to be updated according to a, call extend(b,a); what's the point of overwriting one of the objects then?? anyways – Manish Mishra Feb 26 '13 at 11:44

score 0 · Answer 2 · answered Feb 26 '13 at 11:20

0

It's simple

for (var p in a)
   b[p] = a[p];

answered Feb 26 '13 at 11:20

Damask

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but what about nested jsons , how do i acheive the result ? – Krithika Vittal Feb 26 '13 at 11:34
this case you'll need to use a recursion for nested objects. Use instanceof to detect it. – Damask Feb 26 '13 at 11:38

score -1 · Answer 3 · edited May 14 '19 at 10:28

-1

let x = {
  a: 1,
  b: 2,
  c: 3  
}

let y = {
  c: 4, 
  d: 5,
  e: 6
}

let z = Object.assign(x, y)

console.log(z)

z:
{
  a:1,
  b:2,
  c:4, 
  d:5,
  e:6,
}

---> NOTICE : the object z take the y's c attribute

edited May 14 '19 at 10:28

Matt

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answered May 14 '19 at 09:29

user2898676

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Merging two json objects in Java script?

3 Answers3

update.

Linked