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(C++) JSON: Nested ArrayHere we have a JSON object that contains nested arrays. This example demonstrates how to access the contents of the nested arrays. { "numbers" : [ ["even", 2, 4, 6, 8], ["prime", 2, 3, 5, 7, 11, 13] ] }
#include <CkJsonObject.h> #include <CkJsonArray.h> void ChilkatSample(void) { CkJsonObject json; // This is the above JSON with whitespace chars removed (SPACE, TAB, CR, and LF chars). // The presence of whitespace chars for pretty-printing makes no difference to the Load // method. const char *jsonStr = "{ \"numbers\" : [ [\"even\", 2, 4, 6, 8], [\"prime\", 2, 3, 5, 7, 11, 13] ] }"; bool success = json.Load(jsonStr); if (success != true) { std::cout << json.lastErrorText() << "\r\n"; return; } // Get the value of the "numbers" object, which is an array that contains JSON arrays. CkJsonArray *outerArray = json.ArrayOf("numbers"); if (json.get_LastMethodSuccess() == false) { std::cout << "numbers array not found." << "\r\n"; return; } int numArrays = outerArray->get_Size(); int i; for (i = 0; i <= numArrays - 1; i++) { CkJsonArray *innerArray = outerArray->ArrayAt(i); // The first item in the innerArray is a string std::cout << innerArray->stringAt(0) << ":" << "\r\n"; int numInnerItems = innerArray->get_Size(); int j; for (j = 1; j <= numInnerItems - 1; j++) { std::cout << " " << innerArray->IntAt(j) << "\r\n"; } delete innerArray; } delete outerArray; } |
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