ZOCUNT

ZOCUNT

用于计算有序集合中指定分数区间的成员数量。

Command

$ redis-cli -h 127.0.0.1 -p 6379
127.0.0.1:6379> zadd animal 1 cat 2 dog 3 fish 4 goose
(integer) 4
127.0.0.1:6379> zcount animal 2 3
(integer) 2

Code

func zcount(c redis.Conn) {
    defer c.Do("DEL", "animal")
    c.Do("ZADD", "animal", 1, "cat", 2, "dog", 3, "fish", 4, "goose")
    count, err := c.Do("ZCOUNT", "animal", 2, 3)
    if err != nil {
        colorlog.Error(err.Error())
        return
    }
    fmt.Println("Specifies the number of members of the score interval is:", count)
}

Output

$ go run main.go
Specifies the number of members of the score interval is: 2