AngularJS Convert Array to JSON

Question

I have an array containing 3 elements

var a = [];
  a["username"]=$scope.username;
  a["phoneNo"]=$scope.phoneNo;
  a["altPhoneNo"]=$scope.altPhoneNo;

Now, I want to send this data to server in JSON format. Therefore, I used

    var aa = JSON.stringify(a);
    console.log("aa = "+aa);

But the console displays empty array

aa = []

How can I convert this array into JSON?

Though the console displays [], a does contain all the items. Just change var a = []; to var a = {}; — AlwaysALearner
– AlwaysALearner, Commented Mar 5, 2014 at 7:23
JSON Arrays don't support named keys; just numbered indices. So, they can't be included in the string. You can however use named keys with Objects -- var a = {};. — Jonathan Lonowski
– Jonathan Lonowski, Commented Mar 5, 2014 at 7:23

ivarni · Accepted Answer · 2014-03-05 07:32:17Z

9

That's not the correct way to add elements to an array, you're adding properties instead. If you did console.log(a.username); you'd see your $scope.username value.

You could either do

var a = [];
a.push({"username": $scope.username});
a.push({"phoneNo": $scope.phoneNo});
a.push({"altPhoneNo": $scope.altPhoneNo});

But it looks more like what you're trying to do is

var a = {};
a["username"] = $scope.username;
a["phoneNo"] = $scope.phoneNo;
a["altPhoneNo"] = $scope.altPhoneNo;

That is, you want your a to be an object if you're going to add properties to it. And that would be better written as

var a = {};
a.username = $scope.username;
a.phoneNo = $scope.phoneNo;
a.altPhoneNo = $scope.altPhoneNo;

edited Mar 5, 2014 at 7:32

answered Mar 5, 2014 at 7:26

ivarni

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