[jpc0]

[]inferface

But the same issue exists as other dynamic languages, how do you know what the type is of the item you are accessing?

If you know the array will be laid out exactly like that before you make the request you can always create a custom parser to return a struct with those fields name what they actually are instead of arbitrary data.

The only valid way to parse that dynamically is to try and fail in a loop which is inefficient enough that you should stop using whatever API returns that monstrosity.