Ruby's great for recommendation engines and JRuby has all the Java libraries. Programming Collective Intelligence is a good starter book: http://www.amazon.com

Ruby's great for recommendation engines and JRuby has all the Java libraries. Programming Collective Intelligence is a good starter book: http://www.amazon.com/dp/0596529325?tag=loucalnet-20&camp=14573&creative=327641&linkCode=as1&creativeASIN=0596529325&adid=0B8VVW2VW971MVW6D8MX&#38 http://www.amazon.com/dp/0596529325?tag=loucalnet-20&cam...;