twitter/cassandra — pull request #154 by psanford (2012-08-03 01:00:05+00:00)
Title: Add support for DynamicComposite columns.

The interface is the same as the Composite type except you must pass in type,value pairs:

Cassandra::DynamicComposite.new(['IntegerType', [1].pack('N')], ['UTF8Type', "elephant"]),