c++ json-nlohmann accessing the list elements - c++

Question

I'm trying to use json-nlohmann library to read JSON files in C++
So far I got along with it preatty well, but now I'm trying to access elements of the list in given json. JSON:
{
"GameMap": "path_to_game_map",
"Objects": [
{ "object_1": { "Transform": { "Position": { "X": 1, "Y": 2 }, "Rotation": { "X": 3.5, "Y": 8.2 }, "Scale": { "X": 1, "Y":1 } },
"Components": [
{ "0": { "data": { "some_data": "false" } } },
{ "1": { "data": { "some_data": "false" } } },
{ "2": { "data": { "some_data": "false" } } }
] } },
{ "object_2": { "Transform": { "Position": { "X": 1, "Y": 2 }, "Rotation": { "X": 3.5, "Y": 8.2}, "Scale": { "X": 1, "Y":1 } },
"Components": [
{ "0": { "data": { "some_data": "false" } } },
{ "1": { "data": { "some_data": "false" } } },
{ "2": { "data": { "some_data": "false" } } }
] } }
]
}
Where I'm trying to access each Component and read it's key value.
I've got an object out for every Component. But I just cannot figure out how to read its key and value.
Help! Please.

Answer 1

When you iterate a JSON object, say j, you can access the key and value like this:
for (json::iterator it = j.begin(); it != j.end(); ++it) {
std::cout << it.key() << " : " << it.value() << "\n";
}
you can also now use for (auto& element : j.items()) and then element.key() and element.value() inside the loop.