How to add json objects to a map?

[davidshen84]

I have an array of json objects.

［{id: 1...},
     {id: 2...}
     ....
  ]

I want to put each of them into a map<string, ?> for easy look up.

But I have no idea what to use for ?.

[nlohmann]

That entirely depends on your stored JSON objects. If all object values are integers, you can use std::map<std::string, int> - but once you are not sure, you need to create a container which is basically basic_json.

[davidshen84]

No, the json object is not a scalar value, but a complex one, and I have to store all of them. I tried `basic_json`, but I got error saying something like template instantiate not defined. Regards, David

…

On Fri, Jan 20, 2017, 23:49 Niels Lohmann ***@***.***> wrote: That entirely depends on your stored JSON objects. If all object values are integers, you can use std::map<std::string, int> - but once you are not sure, you need to create a container which is basically basic_json. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#432 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAEAzReGHFNVMKrd67Pb5KeOU5-4PoiIks5rUNd4gaJpZM4LpQ1-> .

[nlohmann]

Yes, you need to fill the template parameters - can you try json?

[davidshen84]

Of course I have tried `json`. How can I fill the template parameters?

…

On Sat, Jan 21, 2017, 20:48 Niels Lohmann ***@***.***> wrote: Yes, you need to fill the template parameters - can you try json? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#432 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAEAzafzSPjE-3dSyEwDRfXdy_T9zCWuks5rUf6tgaJpZM4LpQ1-> .

[nlohmann]

You do not need to fill parameters if you use json- it is just a specialization for basic_json. Can you please provide a detailed error message?

[davidshen84]

Ok, `map<string, json>` works. Previously, I invoked the `.insert` method wrong, and it gives me an ambiguous error message which lead me to think that my declaration were wrong. Thanks, David

…

On Sat, Jan 21, 2017 at 8:52 PM Niels Lohmann ***@***.***> wrote: You do not need to fill parameters if you use json- it is just a specialization for basic_json. Can you please provide a detailed error message? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#432 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAEAzY6mPku0iD0UjnIZz69jK8CT0glSks5rUf-JgaJpZM4LpQ1-> .