RDD: +filter
RDD: +filter

ondra-m/ruby-spark,tomz/ruby-spark,tomz/ruby-spark,tomz/ruby-spark,ondra-m/ruby-spark,ondra-m/ruby-spark,ondra-m/ruby-spark,ondra-m/ruby-spark,tomz/ruby-spark,ondra-m/ruby-spark,tomz/ruby-spark,tomz/ruby-spark