如何在 nlohmann 的 json 库中获取数组长度？

Question

I am using nlohmann/json lib and want to get the length of a json array. Image i have:

[
"test",
"test2"
]

and want to recieve the length (2). When i tried the .length() method, it showed me this error:

using json = using json = class nlohmann::basic_json<>' {aka 'class nlohmann::basic_json<>'} has no member named 'length

so how can I get the length in this library?

Answer 1

您想在这里使用myJsonArray.size()方法。