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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.
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 set-1 4 a zadd set-1 5 b 6 c 7 d 8 e 8 f 5 g 6 h 7 i 8 j 8 k
zrange set-1 0 -1
zrange can also make us know the scores of the elements,we should open seletion the withscores to
find out their scores.
zrange set-1 0 -1 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 zrangebyscore set-1 0 6
to finish this job.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 zrangebylex set-1 (a [k can easily do this job.
we use zrevrank .For example ,we want to know the member d‘s rank.
zrank set-1 d zrevrank set-1 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 set-1 a zrem set-1 b c
zremrangebyrank set-1 0 1
zremrangebyscore set-1 0 7
zremrangebylex set-1 (e (j
we use zscore set-1 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 zcount set-1 0 10 .
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 zincrby set-1 1 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.
1 //zadd 2 db.SortedSetAdd("set-1", "a", 4); 3 var set_1 = new SortedSetEntry[10] 4 { 5 new SortedSetEntry("b",5), 6 new SortedSetEntry("c",6), 7 new SortedSetEntry("d",7), 8 new SortedSetEntry("e",8), 9 new SortedSetEntry("f",8), 10 new SortedSetEntry("g",5), 11 new SortedSetEntry("h",6), 12 new SortedSetEntry("i",7), 13 new SortedSetEntry("j",8), 14 new SortedSetEntry("k",8) 15 }; 16 db.SortedSetAdd("set-1", set_1); 17 18 //zrange 19 Console.WriteLine("rank by score ascending"); 20 foreach (var item in db.SortedSetRangeByRank("set-1", 0, -1, Order.Ascending)) 21 { 22 Console.Write(item + " "); 23 } 24 Console.WriteLine(""); 25 foreach (var item in db.SortedSetRangeByRankWithScores("set-1")) 26 { 27 Console.WriteLine(string.Format("the {0} with score {1}", item.Element, item.Score)); 28 } 29 //zrangebyscore 30 Console.WriteLine("sorted by score"); 31 foreach (var item in db.SortedSetRangeByScore("set-1",0,6)) 32 { 33 Console.Write(item + " "); 34 } 35 Console.WriteLine(""); 36 //zrangebylex 37 Console.WriteLine("sorted by value"); 38 foreach (var item in db.SortedSetRangeByValue("set-1","a","z")) 39 { 40 Console.Write(item + " "); 41 } 42 Console.WriteLine(""); 43 //zrank 44 Console.WriteLine(string.Format("d rank in {0} by ascending", db.SortedSetRank("set-1", "d", Order.Ascending))); 45 Console.WriteLine(string.Format("d rank in {0} by descending", db.SortedSetRank("set-1", "d", Order.Descending))); 46 47 //zrem 48 db.SortedSetRemove("set-1", "a"); 49 db.SortedSetRemove("set-1", new RedisValue[2] { "b", "c" }); 50 Console.WriteLine("after removing - 1:"); 51 foreach (var item in db.SortedSetRangeByRank("set-1", 0, -1, Order.Ascending)) 52 { 53 Console.Write(item + " "); 54 } 55 56 //zrembyrangebyrank 57 db.SortedSetRemoveRangeByRank("set-1", 0, 1); 58 Console.WriteLine("\nafter removing by rank:"); 59 foreach (var item in db.SortedSetRangeByRank("set-1", 0, -1, Order.Ascending)) 60 { 61 Console.Write(item + " "); 62 } 63 //zremrangeby score 64 db.SortedSetRemoveRangeByScore("set-1", 0, 7); 65 Console.WriteLine("\nafter removing by score:"); 66 foreach (var item in db.SortedSetRangeByRank("set-1", 0, -1, Order.Ascending)) 67 { 68 Console.Write(item + " "); 69 } 70 //zremrangebylex 71 db.SortedSetRemoveRangeByValue("set-1", "d", "g"); 72 Console.WriteLine("\nafter removing by value:"); 73 foreach (var item in db.SortedSetRangeByRank("set-1", 0, -1, Order.Ascending)) 74 { 75 Console.Write(item + " "); 76 } 77 Console.WriteLine(""); 78 //zscore 79 Console.WriteLine(string.Format("the score of e is {0}", db.SortedSetScore("set-1", "e"))); 80 //zcount 81 Console.WriteLine(string.Format("{0} members in set-1", db.SortedSetLength("set-1"))); 82 //zincrby 83 Console.WriteLine(string.Format("the score of d increase by 1 is {0}", db.SortedSetIncrement("set-1", "d", 1)));
Basic Tutorials of Redis(5) - Sorted Set
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原文地址：http://www.cnblogs.com/catcher1994/p/5846967.html
