awesome set magic

gistfile1.txt

1.8.7 :004 > def testfoo(ports)
1.8.7 :005?>   val1 = Zlib.crc32(Set.new(ports).inspect)
1.8.7 :006?>   val2 = Zlib.crc32(Set.new(Set.new(ports)).inspect)
1.8.7 :007?>   puts "val1 '#{val1}'"
1.8.7 :008?>   puts "val2 '#{val2}'"
1.8.7 :009?>   end
 => nil 
1.8.7 :010 > testfoo([22,8080])
val1 '3915886963'
val2 '3915886963'
 => nil 
1.8.7 :011 > testfoo([22,8140])
val1 '2614511658'
val2 '2664507259'
 => nil