練習命令使用，具體如下：

• 練習無序集合類型命令

sadd smembers scard srem sinter sunion sdiff

sismember srandmember spop

• 練習有序集合類型命令

無序集合中的每個元素都是不同的，且沒有順序

創建/追加/刪除/查看

127.0.0.1:6379> sadd mylike file music game  創建無序集合
(integer) 3
127.0.0.1:6379> type mylike  查看類型
set
127.0.0.1:6379> sadd mylike sleep game it  增加值
(integer) 2
127.0.0.1:6379> srem mylike sleep game  刪除值
(integer) 2
127.0.0.1:6379> SMEMBERS mylike  查看成員
1) "file"
2) "music"
3) "it"

判斷元素是否在集合中

127.0.0.1:6379> SISMEMBER mylike it
(integer) 1
127.0.0.1:6379> SISMEMBER mylike game
(integer) 0

輸出成員個數

127.0.0.1:6379> SMEMBERS mylike
1) "file"
2) "music"
3) "it"
127.0.0.1:6379> SCARD mylike
(integer) 3

創建helike變量

127.0.0.1:6379> sadd helike film music game sleep

合集： 合并2個集合的成員，重復的成員只顯示一次

127.0.0.1:6379> SMEMBERS helike
1) "film"
2) "music"
3) "sleep"
4) "game"
127.0.0.1:6379> SMEMBERS mylike
1) "film"
2) "music"
3) "it"
127.0.0.1:6379> SUNION mylike helike
1) "it"
2) "film"
3) "music"
4) "sleep"
5) "game"

交集 輸出2個集合中相同的成員

127.0.0.1:6379> SMEMBERS helike
1) "film"
2) "music"
3) "sleep"
4) "game"
127.0.0.1:6379> SMEMBERS mylike
1) "film"
2) "music"
3) "it"
127.0.0.1:6379> SINTER mylike helike
1) "film"
2) "music"

差集: 比較2個集合成員的不同，用第一個集合 與 第二個集合比較

127.0.0.1:6379> SMEMBERS helike
1) "film"
2) "music"
3) "sleep"
4) "game"
127.0.0.1:6379> SMEMBERS mylike
1) "film"
2) "music"
3) "it"
127.0.0.1:6379> SDIFF mylike helike
1) "it"

隨機獲得集合中的成員

127.0.0.1:6379> SMEMBERS mylike
1) "film"
2) "music"
3) "it"
127.0.0.1:6379> SRANDMEMBER mylike 2  兩個不相同的
1) "it"
2) "music"
127.0.0.1:6379> SRANDMEMBER mylike 2
1) "film"
2) "music"
127.0.0.1:6379> SRANDMEMBER mylike -2 允許兩個相同
1) "it"
2) "it"
127.0.0.1:6379> SRANDMEMBER mylike -2
1) "it"
2) "music"

集合中隨機彈出一個成員

127.0.0.1:6379> SMEMBERS mylike
1) "2"
2) "music"
3) "1"
4) "it"
127.0.0.1:6379> spop mylike 2 隨機彈出兩個成員
1) "2"
2) "1"
127.0.0.1:6379> SMEMBERS mylike
1) "music"
2) "it"

步驟二：練習有序集合類型命令

ZADD命令的返回值是新加入到集合中的元素個數

127.0.0.1:6379> zadd mem 88 tom 90 jerry 75 bob 92 alice  
(integer) 4
127.0.0.1:6379> type mem  查看類型
zset
127.0.0.1:6379> ZCARD mem  查看集合數量
(integer) 4
127.0.0.1:6379> ZRANGE mem 0 -1 查看集合成員
1) "bob"
2) "tom"
3) "jerry"
4) "alice"
127.0.0.1:6379> ZRANGE mem 0 -1 withscores  查看集合成員和相對應的值
1) "bob"
2) "75"
3) "tom"
4) "88"
5) "jerry"
6) "90"
7) "alice"
8) "92"

獲得某個成員的值???獲得指定分數范圍的元素

127.0.0.1:6379> ZSCORE mem bob
"75"
127.0.0.1:6379> ZRANGEBYSCORE mem 70 90 withscores
1) "bob"
2) "75"
3) "tom"
4) "88"
5) "jerry"
6) "90"

- 刪除元素

127.0.0.1:6379> Zrem mem bob
(integer) 1
127.0.0.1:6379> ZRANGE mem 0 -1
1) "tom"
2) "jerry"
3) "alice"

- 獲得元素的排名

127.0.0.1:6379> ZRANGE mem 0 -1 withscores
1) "tom"
2) "88"
3) "jerry"
4) "90"
5) "alice"
6) "92"
127.0.0.1:6379> ZRANK mem tom
(integer) 0
127.0.0.1:6379> ZRANK mem alice
(integer) 2