The last post is mainly about the unsorted set,in this post I will show you the sorted set playing an important

role in Redis.There are many command added after the version 2.8.9.OK,let's see the below picture firstly.There

are 24 commands to handle the sorted set,the same as the string.

playing a important role on sorting.We can use the zadd to store the sorted set.The following example demonstrates

the usage of zadd.

　　zrange can also make us know the @R_403_182@s of the elements,we should open seletion the with@R_403_182@s to 

find out their @R_403_182@s.

we use zrevrank .For example,we want to know the member d's rank.

 　　There are also many command that we can use to remove the member from the set.Using zrem to remove one or

more members,Using zremrangebyrank to remove the members by their ranks.Using the zremrangeby@R_403_182@ to remove

the members by their @R_403_182@s.Using the zremrangebylex to remove the members by their rank and lexicography.

we use  403_182@ - e .For learning how many members in the set by the range of @R_403_182@,we can use zcount

to get the amount.To get the amount of the set by the @R_403_182@'s range [0,10],we can use  -  .

 　　Can we modify the @R_403_182@s of the members?Of course we can.Not only the exists member but also the

member not in the set.If the member not exists in the set,Redis will store a new member to the set.For

example,I want to modify the @R_403_182@ of d which is not exists in the set.I will use  - d  to finish

this easy job.And the result is that the set will has a new member with @R_403_182@ 1.

　　OK,thoes commands are what I want to show you for sorted set.Let's go on to see how StackExchange.Redis

Handle the sorted set.