mem-ruby: Cleanup filters

Renamed member variables to comply with general naming
conventional outside of the ruby folder so that the
filters can be moved out.

Moved code to base to reduce code duplication.

Renamed the private get_index functions to hash, to make their
functionality explicit.

Change-Id: Ic6519cfc5e09ea95bc502a29b27f750f04eda754
Signed-off-by: Daniel R. Carvalho <>
Maintainer: Nikos Nikoleris <>
Tested-by: kokoro <>
Reviewed-by: Nikos Nikoleris <>
15 files changed