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

1

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.

answered Jun 10, 2022 at 14:09

Nicolas Gil

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Comments

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

0

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)

answered Jun 10, 2022 at 14:12

LoLucky

1034 bronze badges

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