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(C) Find and Delete Object from JSON ArrayDemonstrates how to find an delete an object from a JSON array of objects.
#include <C_CkJsonObject.h> #include <C_CkJsonArray.h> void ChilkatSample(void) { HCkJsonObject json; BOOL success; HCkJsonObject menu; HCkJsonArray catArr; int index; // This example will delete the "Pasta" category object from Menu B. // { // "menus": [ // { // "name": "Menu A", // "categories": [ // { // "name": "Kebabs", // "description": "blah blah blah" // }, // { // "name": "Burgers", // "description": "blah blah blah" // }, // { // "name": "Pasta", // "description": "blah blah blah" // }, // { // "name": "Appetizers", // "description": "blah blah blah" // } // ] // }, // { // "name": "Menu B", // "categories": [ // { // "name": "Kebabs", // "description": "blah blah blah" // }, // { // "name": "Burgers", // "description": "blah blah blah" // }, // { // "name": "Pasta", // "description": "blah blah blah" // }, // { // "name": "Appetizers", // "description": "blah blah blah" // } // ] // } // ] // } json = CkJsonObject_Create(); success = CkJsonObject_LoadFile(json,"qa_data/json/menus.json"); if (success == FALSE) { printf("%s\n",CkJsonObject_lastErrorText(json)); CkJsonObject_Dispose(json); return; } // Find Menu B. menu = CkJsonObject_FindRecord(json,"menus","name","Menu B",TRUE); // assume menu is found.. // Get the categories array, and then find the index of the "Pasta" menu category. catArr = CkJsonObject_ArrayOf(menu,"categories"); // Assume it is found.. // Find the object where the name of the JSON member is "name", and the value is "Pasta" index = CkJsonArray_FindObject(catArr,"name","Pasta",TRUE); if (index < 0) { printf("Pasta not found.\n"); } else { // Delete the "Pasta" category record from Menu B success = CkJsonArray_DeleteAt(catArr,index); // Assume OK.. } // Examine the JSON to see if it worked as expected.. CkJsonObject_putEmitCompact(json,FALSE); printf("%s\n",CkJsonObject_emit(json)); CkJsonArray_Dispose(catArr); CkJsonObject_Dispose(menu); CkJsonObject_Dispose(json); } |
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