How to iterate JSON object with same key

Question

I have a API response, which is like the below code

const res = { "a" : {}, "a" : {} }

This is invalid json. Error: Duplicate key 'a' will be shown — codeandcloud
– codeandcloud, Commented Jun 10, 2022 at 14:02
I know this is a invalid JSON. But is there any way to iterate it ? — Naveen Kumar
– Naveen Kumar, Commented Jun 10, 2022 at 14:04
Can you possibly make the key unique before parsing the JSON? — mykaf
– mykaf, Commented Jun 10, 2022 at 14:05

Nicolas Gil · Accepted Answer · 2022-06-10 14:09:26Z

This is not possible. In JSON, there is no error if you use the same name for multiple keys, but the last key with the same name will be used. I suggest using an array for the values for a key.

E.g.:

const res = { "a" : {}, "a" : {} }

would be

const res = { "a" : [{}, {}] }

Then you could iterate on the list.

LoLucky · Accepted Answer · 2022-06-10 14:12:33Z

if "a" isn't used to identify it's value, it shouldn't be a key. You could restructure you JSON to look like this:

const res = [ ["a", {}], ["a", {}] ]

and then iterate over it using:

for(let [k,v] of res) print(k,v)

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