Intersect set and sorted set?

[paulsc]

Hello everyone,

Long time lurker, first time poster. Does anybody know if there is a
way to use a redis command to intersect a set and a sorted set in
memory on the redis server ?

Thanks,

Paul

[Dvir Volk]

not without scripting...

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Dvir Volk

System Architect, DoAT, http://doat.com

[Josiah Carlson]

I'm sorry, but Dvir is incorrect.

You can intersect sets and sorted sets via zinterstore (or union them
via zunionstore). Scores for sets are defaulted to 1, but you can
adjust the scores on the entire set by using the weights parameter. I
managed to get that patch in a little over a year ago ;)

Regards,
- Josiah

[Dvir Volk]

wow, I haven't been so happy being wrong about something, in a long time!

this is really useful, I can't believe I've missed it in the documentation!

thanks a lot for the patch, Josiah!

[Josiah Carlson]

I'm glad to help,
- Josiah

[kehai chen]

I am s starter ,are you list seveal demo ? 

2011/11/24 Josiah Carlson <josiah....@gmail.com>

[Josiah Carlson]

Here is an example in Python:

>>> import redis
>>> c = redis.Redis()
>>> c.sadd('foo', 'bar')
True
>>> c.sadd('foo', 'baz')
True
>>> c.zadd('goo', 'baz', 3)
True
>>> c.zadd('goo', 'boo', 2)
True
>>> c.zinterstore('out', ['foo', 'goo']) # the default aggregate is SUM
1L
>>> c.zrange('out', 0, -1, withscores=True)
[('baz', 4.0)]
>>> c.zunionstore('out', ['foo', 'goo'])
3L
>>> c.zrange('out', 0, -1, withscores=True)
[('bar', 1.0), ('boo', 2.0), ('baz', 4.0)]
>>>

Regards,
- Josiah