CODEWITHSUNDEEP
cjson
Jack Nickolson
Jack Nickolson

Reputation: 225

Copying objects from one json array to another

I'm iterating through the array of json objects and putting specific elements into another.

 char *jsonString = getList(); // reads file and returns json string
 json_error_t err;
 json_t *jsonArr = json_loads(jsonString , 0 , &err);
 int index = 0;
 json_t *value = NULL;
 json_t *resultArr = malloc(sizeof(json_t) * 100);

 json_array_foreach(jsonArr , index , value)
 {  
     if(strcmp(json_string_value(json_object_get(value , "citizenship")) , key) == 0)
     {
         json_array_append_new(resultArr , value);
     } 
 }

 printf("Array size : %i\n" , (int)json_array_size(resultArr));

 char * result = json_dumps(resultArr , JSON_INDENT(2));
 json_decref(jsonArr);
 json_decref(resultArr);

 return result;

I am sure that I have 3 elements matching search and it is true judging by the number of if-statement entries, though printf() after the loop says that this newly created array is empty. Are there any obvious issues that you can point out? I'm using jansson library.

Upvotes: 1

Views: 1436

Answers (1)

Kcvin
Kcvin

Reputation: 5163

As stated in the comments, you need to create the json_t array using json_array().

You can see some good examples by looking at the tests the Jansson author has on GitHub.

Upvotes: 2

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