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can function dump() return string in the order I push in the json object ? #286
Description
the program like this:
json obj = { {"result", "OK"}, {"model", "AAA" } };
string str = obj.dump();
which i want get { {"result", "OK"}, {"model", "AAA" } }, but it always return { {"model", "AAA" }, {"result", "OK"} }
Activity
nlohmann commentedon Jul 25, 2016
This is not possible. JSON objects are, by definition, unordered set of key-value pairs. In the library, I use a
std::mapto store objects, so the keys are always ordered alphabetically. You may want to try if you use https://github.com/nlohmann/fifo_map asobject_t.ivakyb commentedon Jan 12, 2018
How to replace
std::mapwithfifo_map?ivakyb commentedon Jan 15, 2018
See https://github.com/nlohmann/json#notes, last item about insertion order of object elements.