(JavaScript) Demonstrates how to Handle Large Integers in JSON
Demonstrates how to handle large integers in JSON. (Integers larger than what can fit in a 32-bit signed integer.)
var success = false;
// Let's say your JSON has this:
// {
// "id": 20000000001234567
// }
var json = new CkJsonObject();
success = json.LoadFile("qa_data/json/large_int.json");
if (success == false) {
console.log(json.LastErrorText);
return;
}
// The integer is too large for a 32-bit signed integer that is returned by IntOf.
// The result will be something that wrapped around and could be negative.
// In this case it would be: -543893881
var id = json.IntOf("id");
console.log("id: " + id);
// The solution is to read the integer value as a string, and then use the features in your programming language
// to convert from a string to a 64-bit integer.
//
// Alternatively, you may wish to simply hold the value as a string. If, for example, the integer simply references
// an order ID, an account ID, etc., then there's no need to convert to an integer value. You're not going to be doing
// mathematical operations on it anyway. This is usually the case for large integers -- they typically exist
// in JSON as an account ID.
// You can get any JSON value as a string:
var accountId = json.StringOf("id");
console.log("accountId: " + accountId);
// Sample output:
// id: -543893881
// accountId: 20000000001234567
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