A sorted set associates a rank to each item in a set.

排序的集合将等级与集合中的每个项目相关联。

Sorted sets work in a similar way to sets, and they use similar commands, except S is now Z, for example:

排序集合的工作方式与集合类似，并且它们使用类似的命令，但S现在是Z ，例如：

• SADD -> ZADD

  SADD - > ZADD

• SPOP -> ZPOP

  SPOP - > ZPOP

But they are slightly different.

但是它们略有不同。

ZADD accepts a score:

ZADD接受分数 ：

ZADD names 1 "Flavio"ZADD names 2 "Syd"ZADD names 2 "Roger"

As you can see, values must still be unique, but now they are associated to a score.

如您所见，值仍然必须是唯一的，但是现在它们已与得分相关联。

The score does not have to be unique.

分数不必是唯一的。

Items in a set are always sorted by the score.

集合中的项目始终按分数排序。

This is very useful to implement some kind of data storage tool like (usual example) a leaderboard. Or to indicate the time some item was added, with a timestamp.

这对于实现某种类型的数据存储工具(例如(页首)排行榜)非常有用。 或指示带有时间戳的添加项目的时间。

You can get the score of an item using ZRANK:

您可以使用ZRANK获取项目的得分：

ZRANK names "Flavio"

List all items in a sorted set using ZRANGE, which works similarly to LRANGE in lists:

使用ZRANGE列出排序集中的所有项目，其作用类似于列表中的LRANGE ：

ZRANGE names 0 -1

Add WITHSCORES to also return the scores information:

添加WITHSCORES还返回分数信息：

You can increment the score of an item in the set using ZINCRBY.

您可以使用ZINCRBY来增加项目集中的ZINCRBY 。

See all the sorted sets commands .

查看所有排序的set命令。

翻译自: