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

• Craicerjack: 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
• Brad: obj isn't JSON... that's at least part of your problem. Just use obj directly.

Answer 1

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'];
}

Answer 2

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}]}";

Answer 3

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;