decrement method

@override Future<int> decrement(String key, [ int value = 1 ])

Decrements the value of an item in the cache.

Implementation

@override
Future<int> decrement(String key, [int value = 1]) async {
  final cmd = await _getCommand();
  if (value == 1) {
    final res = await cmd.send_object(['DECR', key]);
    return res is int ? res : int.parse(res.toString());
  }
  final res = await cmd.send_object(['DECRBY', key, value]);
  return res is int ? res : int.parse(res.toString());
}