Perl

Demonstrates how to Handle Large Integers in JSON

See more JSON Examples

Demonstrates how to handle large integers in JSON. (Integers larger than what can fit in a 32-bit signed integer.) Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# Let's say your JSON has this:

# {
#     "id": 20000000001234567
# }

my $json = Chilkat2::JsonObject->new;

my $success = $json->LoadFile('qa_data/json/large_int.json');
if (!$success) {
    print $json->LastErrorText, "\n";
    exit;
}

# 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
my $id = $json->IntOf('id');
print 'id: ', $id, "\n";

# 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:
my $accountId = $json->StringOf('id');
print 'accountId: ', $accountId, "\n";

# Sample output:

# id: -543893881
# accountId: 20000000001234567