Method ZCard

structure/zset.go:852–864

The ZCard function returns the size of the dictionary of the sorted set stored at key in the database. It takes a string key as an argument.

(key string)

// The ZCard function returns the size of the dictionary of the sorted set stored at key in the database.
// It takes a string key as an argument.
func (zs *ZSetStructure) ZCard(key string) (int, error) {
	if err := checkKey(key); err != nil {
		return 0, err
	}
	keyBytes := stringToBytesWithKey(key)

	zSet, err := zs.getZSetFromDB(keyBytes)
	if err != nil {
		return 0, err
	}
	// get the size of the dictionary
	return zSet.size, nil
}

// ZIncrBy increases the score of an existing member in a sorted set stored at specified key by
// the increment `incBy` provided. If member does not exist, ErrKeyNotFound error is returned.