Method ZScore

structure/zset.go:622–639

ZScore method retrieves the score associated with the member in a sorted set stored at the key

(key string, member string)

// ZScore method retrieves the score associated with the member in a sorted set stored at the key
func (zs *ZSetStructure) ZScore(key string, member 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
	}
	// if the member in the sorted set is found, return the score associated with it
	if v, ok := zSet.dict[member]; ok {
		return v.score, nil
	}

	// if the member doesn't exist in the set, return score of zero and an error
	return 0, _const.ErrKeyNotFound
}

/*
ZRank is a method belonging to the ZSetStructure type. This method retrieves the rank of an element within a sorted set identified by a key. The rank is an integer corresponding to the element's 0-based position in the sorted set when it is arranged in ascending order.