How to create an array of Objects?

[brunohkbx]

Its possible to create the folowing structure?
Using something like jsonObject["objects"]["object"]

{
    "objects": [
      {
        "object": {
          "address": "xxx"
        }},
      {
        "object": {
          "address": "xxx"
        }},
      {
        "object": {
          "address": "xxx"
        }}]
}

[nlohmann]

Yes, please have a look at the documentation: https://github.com/nlohmann/json#json-as-first-class-data-type

[fnc12]

json j = {
    { "objects" , {
        { "object" , {
            { "address", "adr1" },
        }, },
        { "object" , {
            { "address", "adr2" },
        }, },
        { "object" , {
            { "address", "adr3" },
        }, },
    },
};

[brunohkbx]

Thanks @nlohmann
@fnc12 I'm trying to do something like this :

json JsonObjects = json::array();
for (int i = 0; i <= 5; i++)
{
	JsonObjects.append(JsonObject)
}

Is it possible to append/Insert an object in the array?

[fnc12]

Yes. Just like std::vector

auto jsonObjects = json::array();
for(auto i = 0; i <= 5; ++i) {
    jsonObjects.push_back(json::object());
}

[nlohmann]

Of course - it uses (more or less) the same API as std::vector, so you can use push_back. See https://nlohmann.github.io/json/ for an overview.

[brunohkbx]

Thanks everyone.
Got it.

[moodboom]

Excellent. Would it be common enough to get mentioned in the main README doc? Would have helped me I know. Thanks nlohmann, love the class.

[arwinder-jaspal]

Yes. Just like std::vector

auto jsonObjects = json::array();
for(auto i = 0; i <= 5; ++i) {
    jsonObjects.push_back(json::object());
}

hi I am new to C++ and I am trying to achieve the same thing here.

Can anyone provide sample code for this problem?

Thank you in advance.

[code-blooded245]

Can you please tell how to iterate over this type of json array ?

{
    "objects": [
        {
            "object": {
                "address": "xxx"
            }
        },
        {
            "object": {
                "address": "xxx"
            }
        },
        {
            "object": {
                "address": "xxx"
            }
        }
    ]
}

[nlohmann]

// assuming you parse the JSON above to variable j

for (const auto& element : j["objects"])
{
    std::cout << element << std::endl;
}

This should output

{"object":{"address":"xxx"}}
{"object":{"address":"xxx"}}
{"object":{"address":"xxx"}}

Inside the loop, you can access the other elements with

element["object"]["address"]

[code-blooded245]

Thanks!