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mikepack/gist:1810577

Created February 12, 2012 20:04
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gistfile1.rb
artist_keys = REDIS.smembers('users:1')
artist_keys.map!{ |artist_id| "artists:#{artist_id}" } #=> ["artists:1", "artists:2", "artists:3"]
REDIS.sinter(*artist_keys) #=> ["2","3"] where 2 and 3 are user IDs
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