Find out if element in JSON array is boolean, int, char, long, string, char[], String, ...

[beegee-tokyo]

Maybe a stupid question, but I cannot figure out from the API reference or the examples how to solve it.

I receive a JSON object with 2 JSON arrays:
{"msgkeys":["key1","key2","key3"],"msgs":["msg1",0.1234, 10]}
as jsonMsgs.

I can successfully parse the String to a JsonObject and to two JsonArrays with

// Convert message into JSON object
DynamicJsonBuffer jsonBuffer;
JsonObject& regJSON = jsonBuffer.parseObject(jsonMsgs);
if (regJSON.success()) {// Found some entries
   if (regJSON.containsKey("msgkeys")) {
      if (regJSON.containsKey("msgs")) {
         JsonArray& msgKeysJSON = regJSON["msgkeys"];
         JsonArray& msgsJSON = regJSON["msgs"];
         if (msgKeysJSON.size() == msgsJSON.size()) {
            for (int i=0; i<msgsJSON.size(); i++) {
               messageIDs[i] = msgKeysJSON.get<String>(i);
               // TODO get msgs and store in matching variable types
            }
         }
      }
   }
}

For the first array msgkeys, I know that all members are String, but for the second array msgs, the members can be anything allowed (boolean, float, double, signed char, .........) in a JSON array.

QUESTION:
How can I get the type of the entry for each member of the array msgsJSON????

I went down and up the API references and examples, but I could not find how to get information what type an entrance in the array is. I saw JsonVariant::is() in the API reference, but nothing how to use it or if it can be used on JsonArray.

[bblanchon]

Please read FAQ: How to know the type of a value?.

Also, I strongly encourage you to use iterators to read all values from a array:

for (JsonArray::iterator it=array.begin(); it!=array.end(); ++it) {
   if (it->is<const char*>()) {
      Serial.print("It's a string");
   }
   if (it->is<int>()) {
      Serial.print("It's an int");
   }
}

[beegee-tokyo]

Thanks for pointing me to the solution.