Basic Tutorials of Redis(5) - Sorted Set
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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.
Many commands are similar with the Set.Both of them are the set,the sorted set's?
playing a important role on sorting.We can use the zadd to store the?sorted set.The following example demonstrates the usage of zadd. zadd - - b c d e f g h i j k
For learning how many elements in the set,and who are them ? we can use the command zrange.
zrange - -
zrange can also make us know the scores of the elements,we should open seletion the withscores to? find out their scores. zrange - - withscores
There are another intresting commands to get the members.zrangebyscore can find out?the members by their scores.For an instance,I want to find out the members' scores between?0 and 6,so I will use??- ? zrangebylex can find out the?members by the lexicographical order when some of them?are in the same scores.Now I want?to find out the members that order by lexicography when the score are the same while in the?range (a,k],so using ?- (a [k??can easily do this job.
zrank.For descending
we use zrevrank .For example,we want to know the?member d's rank. zrank -- d
? 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 zremrangebyscore to remove the members by their scores.Using the?zremrangebylex to remove the members by their rank and lexicography. zrem -- b c
zremrangebyrank -
zremrangebyscore -
zremrangebylex - (e (j
zscore to get its score.To get the score?of member e,
we use ?- e?.For learning how many members in the set by the range of?score,we can use zcount to get the amount.To get the amount of the set by the score's range?[0,10],we can use ?- ?.
? Can we modify the scores 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 score 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 score 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.
db.SortedSetAdd(,, set_1 = SortedSetEntry[ SortedSetEntry(, SortedSetEntry(, SortedSetEntry(, SortedSetEntry(, SortedSetEntry(, SortedSetEntry(, SortedSetEntry(, SortedSetEntry(, SortedSetEntry(, SortedSetEntry(, db.SortedSetAdd(
Console.WriteLine( ( item db.SortedSetRangeByRank(,,- Console.Write(item + Console.WriteLine( ( item db.SortedSetRangeByRankWithScores( Console.WriteLine(.Format(
Console.WriteLine( ( item db.SortedSetRangeByScore(, Console.Write(item + Console.WriteLine(
Console.WriteLine( ( item db.SortedSetRangeByValue(, Console.Write(item + Console.WriteLine(
Console.WriteLine(.Format(,db.SortedSetRank(, Console.WriteLine(.Format(,Order.Descending)));
db.SortedSetRemove(, db.SortedSetRemove(, RedisValue[] { , Console.WriteLine( ( item db.SortedSetRangeByRank(,Order.Ascending))
Console.Write(item + |
