JSON parse issue for duplicate data?

Question

I'm constructing a JSON based on certain values,

my code is as follows,

var txt = '{ \"' + 9837 + '\": "Cost-A", \"' + 8943 + '\": "Cost-B", \"' + 13917 + '\": "Cost-C", \"' + 13917 + '\": "Cost-D"}';

_obj = JSON.parse(txt);

The output I get in the console is,

Object {9837: "Cost-A", 8943: "Cost-B", 13917: "Cost-D"}

Cost-C has been skipped completely? or is there something trivial I'm missing? How can I solve this?

Why are you constructing JSON with strings in JavaScript? — elclanrs
– elclanrs, Commented May 9, 2013 at 6:01
13917 is duplicate key in your stringified JSON. So it is taking only latest one. — Ahmet DAL
– Ahmet DAL, Commented May 9, 2013 at 6:03
@elclanrs Well, there's a lot of mapping that's happening as well, which is beyond the scope of this question, is there an alternative way? — painotpi
– painotpi, Commented May 9, 2013 at 6:03

DhruvPathak · Accepted Answer · 2013-05-09 06:00:19Z

2

Javascript ojects cannot have duplicate keys. Hence it gets overwritten.

{ "9837": "Cost-A", "8943": "Cost-B", "13917": "Cost-C", "13917": "Cost-D"}

The parser would add the latest value of the key.

answered May 9, 2013 at 6:00

DhruvPathak

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2 Comments

me_digvijay Over a year ago

You cannot use double quotes inside double quotes, until you escape them.

DhruvPathak Over a year ago

@badZoke , No, that would be a badJoke on the way a javascript object works. What would you expect your object to return if you do myObj['13917']

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