how to get left side data of a json dynamically

Question

I have a json which is like

{
"Payload":[{
    "PrevYr":"21333",
    "CurYr":"123454"
},{
    "PrevYr":"234333",
    "CurYr":"45546"
},{
    "PrevYr":"3563",
    "CurYr":"67854"
}]
}

Now in my code i read this json using

  $.getJSON("readJson.json", function (data) {}

I need to read the json and create another json with some changes on it. But i can't read the "CurYr" and "PrevYr". I mean not their values. But them. So if there is 2014 and 2015 in place of curyr and prevyr i can get them also. I need to read the left side. Please help..

this might be help..http://stackoverflow.com/questions/8430336/get-keys-of-json-object-in-javascript — Ajay Makwana, Dec 15 '15 at 06:59
Possible duplicate of [Getting JavaScript object key list](http://stackoverflow.com/questions/3068534/getting-javascript-object-key-list) — ozil, Dec 15 '15 at 06:59

score 1 · Answer 1 · answered Dec 15 '15 at 07:03

Try something like this,

    var test = {
"Payload":[{
    "PrevYr":"21333",
    "CurYr":"123454"
},{
    "PrevYr":"234333",
    "CurYr":"45546"
},{
    "PrevYr":"3563",
    "CurYr":"67854"
}]};

$.each(test.Payload,function(key,val){
        $.each(val,function(key1,val1){
        alert(key1);
    }); 
});

or

var keySet = Object.keys( test.Payload[0] );
 alert( keySet[0]);
 alert( keySet[1]);

score 0 · Answer 2 · answered Dec 15 '15 at 06:59

0

you can use Object.keys( obj );

try

$.getJSON("readJson.json", function (data) {

 console.log( Object.keys(data.Payload[0]));

}

answered Dec 15 '15 at 06:59

gurvinder372

66,980
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score 0 · Answer 3 · answered Dec 15 '15 at 07:04

try this:

var obj = {
"Payload":[{
    "PrevYr":"21333",
    "CurYr":"123454"
},{
    "PrevYr":"234333",
    "CurYr":"45546"
},{
    "PrevYr":"3563",
    "CurYr":"67854"
}]
}

var objKeys = Object.keys(obj);

objKeys.forEach(function(key){
  // This returns "Payload"
  var _innerKeys = Object.keys(obj[key]);
  
  // This returns "0,1,2" since obj[key] is an array.
  _innerKeys.forEach(function(k){
    
    // This will return "PrevYr, CurYr"
    var _innerProp = Object.keys(obj[key][k]);
    console.log(_innerProp);
  })
  console.log("Inner Keys: ", _innerKeys);
})

how to get left side data of a json dynamically

3 Answers3