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In ROS hydro you can now get vectors and dictionaries of primitives and strings without having to use the XmlRpc API: https://github.com/ros/ros_comm/pull/279

See the unit tests for examples, but it works like you'd expect it to work: https://github.com/ros/ros_comm/blob/9c133c6a761f73accbe674af9df1f64c0db49051/test/test_roscpp/test/src/params.cpp#L264

In ROS hydro groovy and forward you can now get vectors and dictionaries of primitives and strings without having to use the XmlRpc API: https://github.com/ros/ros_comm/pull/279

See the unit tests for examples, but it works like you'd expect it to work: https://github.com/ros/ros_comm/blob/9c133c6a761f73accbe674af9df1f64c0db49051/test/test_roscpp/test/src/params.cpp#L264

In ROS groovy and forward you can now get vectors and dictionaries of primitives and strings without having to use the XmlRpc API: https://github.com/ros/ros_comm/pull/279

See the unit tests for examples, but it works like you'd expect it to work: https://github.com/ros/ros_comm/blob/9c133c6a761f73accbe674af9df1f64c0db49051/test/test_roscpp/test/src/params.cpp#L264

I've updated the wiki doc here: http://wiki.ros.org/roscpp/Overview/Parameter%20Server#Retrieving_Lists