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(C++) Loading and Parsing a JSON ArrayA JSON array is JSON that begins with "[" and ends with "]". For example, this is a JSON array that contains 3 JSON objects. [{"name":"jack"},{"name":"john"},{"name":"joe"}]A JSON object, however, is JSON that begins with "{" and ends with "}". For example, this JSON is an object that contains an array. {"pets":[{"name":"jack"},{"name":"john"},{"name":"joe"}]}This example shows how loading a JSON array is different than loading a JSON object.
#include <CkJsonArray.h> #include <CkJsonObject.h> void ChilkatSample(void) { const char *strJsonArray = "[{\"name\":\"jack\"},{\"name\":\"john\"},{\"name\":\"joe\"}]"; const char *strJsonObject = "{\"pets\":[{\"name\":\"jack\"},{\"name\":\"john\"},{\"name\":\"joe\"}]}"; // A JSON array must be loaded using JsonArray: CkJsonArray jsonArray; jsonArray.Load(strJsonArray); // Examine the values: int i = 0; while (i < jsonArray.get_Size()) { CkJsonObject *jsonObj = jsonArray.ObjectAt(i); std::cout << i << ": " << jsonObj->stringOf("name") << "\r\n"; delete jsonObj; i = i + 1; } // Output is: // 0: jack // 1: john // 2: joe // A JSON object must be loaded using JsonObject CkJsonObject jsonObject; jsonObject.Load(strJsonObject); // Examine the values: i = 0; int numPets = jsonObject.SizeOfArray("pets"); while (i < numPets) { jsonObject.put_I(i); std::cout << i << ": " << jsonObject.stringOf("pets[i].name") << "\r\n"; i = i + 1; } // Output is: // 0: jack // 1: john // 2: joe } |
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