Redis其他数据结构应用(续)

Bitmap

• 用户签到活动

  假设举行一个连续登录(根据实际业务来判断哪些行为属于连续登录)7天领奖品活动，用户id：k1_7days_active

  127.0.0.1:6379> setbit k1_7days_active 1(第一天) 1
  (integer) 0
  127.0.0.1:6379> setbit k1_7days_active 2(第二天) 1
  (integer) 0
  127.0.0.1:6379> setbit k1_7days_active 3(第三天) 1
  (integer) 0
  127.0.0.1:6379> setbit k1_7days_active 4(第四天) 1
  (integer) 0
  127.0.0.1:6379> setbit k1_7days_active 5(第五天) 1
  (integer) 0
  127.0.0.1:6379> setbit k1_7days_active 6(第六天) 1
  (integer) 0
  127.0.0.1:6379> setbit k1_7days_active 7(第七天) 1
  (integer) 0
  127.0.0.1:6379> bitcount k1_7days_active
  (integer) 7
  

  假设举行一个联系登录7天领奖品活动，用户id：k2_7days_active

  127.0.0.1:6379> 
  127.0.0.1:6379> setbit k2_7days_active 1 1
  (integer) 0
  127.0.0.1:6379> setbit k2_7days_active 2 1
  (integer) 0
  这里缺少第三天
  127.0.0.1:6379> setbit k2_7days_active 4 1
  (integer) 0
  127.0.0.1:6379> setbit k2_7days_active 5 1
  (integer) 0
  127.0.0.1:6379> setbit k2_7days_active 6 1
  (integer) 0
  127.0.0.1:6379> setbit k2_7days_active 7 1
  (integer) 0
  127.0.0.1:6379> bitcount k2_7days_active
  (integer) 6
  

• 统计某个时间区间范围内活跃用户

  假设用户id为长整形

  用户1：12345

  用户2：23456

  用户3：34567

  //12345 20200201~20200205 
  127.0.0.1:6379> setbit 20200201 12345 1
  (integer) 0
  127.0.0.1:6379> setbit 20200202 12345 1
  (integer) 0
  127.0.0.1:6379> setbit 20200203 12345 1
  (integer) 0
  127.0.0.1:6379> setbit 20200204 12345 1
  (integer) 0
  127.0.0.1:6379> setbit 20200205 12345 1
  //23456 20200201 20200202 20200205
  127.0.0.1:6379> setbit 20200201 23456 1
  (integer) 0
  127.0.0.1:6379> setbit 20200202 23456 1
  (integer) 0
  127.0.0.1:6379> setbit 20200205 23456 1
  (integer) 0
  //34567 20200201 20200204 20200205
  127.0.0.1:6379> setbit 20200201 34567 1
  (integer) 0
  127.0.0.1:6379> setbit 20200204 34567 1
  (integer) 0
  127.0.0.1:6379> setbit 20200205 34567 1
  (integer) 0
  //统计20200201~20200205 都活跃的用户
  127.0.0.1:6379> bitop or destkey 20200201 20200202 20200203 20200204 20200205
  (integer) 4321
  127.0.0.1:6379> bitcount destkey
  (integer) 3
  //统计20200201~20200203 连续活跃的用户
  127.0.0.1:6379> bitop and destkey1 20200201 20200202 20200203 
  (integer) 4321
  127.0.0.1:6379> bitcount destkey1
  (integer) 1
  ​
  

Geospatial

• 计算地理位置

  举例：北京、上海、杭州

  127.0.0.1:6379> GEOADD cities 116.404269 39.91582 "beijing" 121.478799 31.235456 "shanghai"
  (integer) 2
  127.0.0.1:6379> ZRANGE cities 0 -1 WITHSCORES
  1) "shanghai"
  2) "4054803475356102"
  3) "beijing"
  4) "4069885555377153"
  127.0.0.1:6379> GEODIST cities beijing shanghai km
  "1068.5677"
  127.0.0.1:6379> GEOHASH cities shanghai 
  1) "wtw3sq4ptp0"
  127.0.0.1:6379> GEOPOS cities beijing shanghai
  1) 1) "116.40426903963088989"
     2) "39.91581928642635546"
  2) 1) "121.47879928350448608"
     2) "31.23545629441388627"
  127.0.0.1:6379> GEOADD cities 120.165036 30.278973 hangzhou
  (integer) 1
  127.0.0.1:6379> GEORADIUS cities 120 30 500 km
  1) "hangzhou"
  2) "shanghai"
  127.0.0.1:6379> GEORADIUSBYMEMBER cities shanghai 200 km
  1) "hangzhou"
  2) "shanghai"
  127.0.0.1:6379> ZRANGE cities 0 -1 WITHSCORES
  1) "hangzhou"
  2) "4054134264615180"
  3) "shanghai"
  4) "4054803475356102"
  5) "beijing"
  6) "4069885555377153"
  127.0.0.1:6379> ZREM cities hangzhou
  (integer) 1
  127.0.0.1:6379> ZRANGE cities 0 -1 WITHSCORES
  1) "shanghai"
  2) "4054803475356102"
  3) "beijing"
  4) "4069885555377153"
  127.0.0.1:6379
  原文链接：https://blog.csdn.net/zhang197093/article/details/72979038
  

Hyperloglogs

• 需要在一小时内统计不同的用户

  例如 USER:LOGIN:2020020111，我们要统计在 2020 年 02月 01 日上午11 点至 12 点之间发生用户登录操作的非重复用户数

  127.0.0.1:6379> pfadd USER:LOGIN:2020020111 A
  (integer) 1
  127.0.0.1:6379> pfadd USER:LOGIN:2020020111 B C D E F
  (integer) 1
  127.0.0.1:6379> pfcount USER:LOGIN:2020020111
  (integer) 6
  

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