How to read the values inside the json array

Question

I have a json like

var obj={
"address":{
       "addlin1":"",
       "addlin2":""
         },
 "name":"sam",
 "score":[{"maths":"ten",
            "science":"two",
             "pass":false
           }]
}

Now when Iam trying to modify the json iam try an array variable and passing above json to that like

var data=JSON.parse(obj);
var json={}; 
json['name']=data['name'];
json['address']={};
json['address']['addressline1']=data['address']['addlin1'];
json['address']['addressline2']=data['address']['addlin2'];
json['marks']={};
json['maths']=data['score']['maths'];

For name and address I was able to form the json as i was expecting.But for marks I was unable.May be in obj json score values are in [ ]

So,when i console the json it is in this way

"name":"sam",
"address":{
   "addresslin1":"",
   "addresslin2":""
     },
  "score":{}
  }

So how can I also read the values inside [] array.

Can someone help me Thanks

youre nearly there - score is an array according to your first bit of code so access the first object in the score array and then continue as you were score[0].maths. You can use dot notation with javascript objects too, if you prefer along the lines of data.address.addlin1 — Craicerjack
– Craicerjack, Commented Oct 6, 2016 at 19:13
obj isn't JSON... that's at least part of your problem. Just use obj directly. — Brad
– Brad, Commented Oct 6, 2016 at 19:16

Vedran Jukic · Accepted Answer · 2016-10-06 19:23:34Z

3

json['maths']=data['score'][0]['maths'];

if you're not sure that data['score'] has any elements you can check prior to reading maths key:

if (data['score'].length) {
    json['maths']=data['score'][0]['maths'];
}

edited Oct 6, 2016 at 19:23

answered Oct 6, 2016 at 19:14

Vedran Jukic

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Max Koretskyi · Accepted Answer · 2016-10-06 19:15:35Z

0

data['score'] is an array, so you can't read it like that

json['maths']=data['score']['maths'];

you have to read it like that:

json['maths'] = data['score'][0].maths;

Also, obj is not a JSON, but a JavaScript object. You can use it directly.

json['maths'] = obj['score'][0].maths;

A JSON is a string, like that:

JSON.stringify(obj)
var json = "{"address":{"addlin1":"","addlin2":""},"name":"sam","score":[{"maths":"ten","science":"two","pass":false}]}";

answered Oct 6, 2016 at 19:15

Max Koretskyi

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user3754008 · Accepted Answer · 2016-10-06 19:23:50Z

0

create another json2 to contain score data then assign to json.

for example :

        var json={}; 
        json2 = {}
        json2[0] = 1;
        json2[1] = 2;
        json[0] = json2;

answered Oct 6, 2016 at 19:23

user3754008

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