Parsing JSON w/ @ at sign symbol in it (arobase)

Question

My JSON object evaluates to:

{ "@io": IO, "@type": XXX }

If this variable is called my_json, how do I access the @type value of XXX? I tried my_json.@type, but this is giving errors. Help appreciated. Thanks,

Nick

Sedition

My first inclination would be to do a string replace on your the HTTP response before parsing it. Maybe replace all instances of "@" with "at_" or something. – Kermitkermy

I am not understanding why this question got voted down, and since many people wonder how to access an object property or method which has odd naming, or when they only have a var containing the property name in a string, I will upvote. – Braswell

because i believe it as been answered multiple times in this forum #1710603 – Apophyllite

@Aaron Saunders: The question you linked is quite different... – Braswell

Answer 1

Use square bracket notation with a string:

var XXXValue = my_json['@type'];

The same can be used when you have a property name in a variable. Using your same example:

var propertyName = '@type';
var XXXValue = my_json[propertyName];

Braswell

What is the purpose of the @ symbol inside of a json file? Does it have any added meaning inside of the json context? – Legman

@David in a string such as it is, it has no specific meaning in any context (JSON, JS, etc) within the question. I have no idea why the OP has keys named like that, but it isn't of any significance in the technologies discussed. – Braswell

Quite an old question but it comes up in Google searches. The @ symbol in JSON is JSON-LD (JSON for Linked Data). en.wikipedia.org/wiki/JSON-LD – Ginoginsberg

@Legman I think it is often used to put it on top of alphabetical sort in order to make it stand out (important metadata, ...) – Oakie

The @ symbole is often use when you convert XML to JSON, i.e. the properties of a node will get mapped to @, so <product id="p1"/> will generate a JSON with "@id":"p1" – Accentor

Answer 2

As you've discovered, you can't use an @ symbol in a Javascript variable name, my_json.@type is invalid.

The good news for you is that you can access your variables as array subscripts. You would do it like this:

my_json["@type"]

Hope that helps.

Anett

Correct me if I'm wrong, but I don't think you should use the word "array" here. – Cyprio

Answer 3

If it ends up evaluating you can take the object and probably grab it by the key.

ie obj["@type"]. But something does seem a bit off.

Codicodices