gistfile1.txt

require 'rubygems'
require 'redis'

adapter = Redis.new(:host => '127.0.0.1', 
                     :port => 6379, 
                     :thread_safe => true, 
                     :db => 10)
                     
adapter.flushdb

adapter.sadd("wanted", "foo")
adapter.sadd("wanted", "bar")

adapter.sadd("available", "foo")
adapter.sadd("available", "bar")

adapter.sadd("notified", "bar")

# Without this line, seems to work
adapter.expire("notified", 300)

adapter.sinterstore("result", "available", "wanted")
puts "SDIFF ::: #{adapter.sdiff('result', 'notified').inspect}"
adapter.sdiffstore("result2", "result", "notified")
puts "SDIFFSTORE ::: #{adapter.smembers('result2').inspect}"