gistfile1.builder

#State,attribute
#California,sunshine
#California,beaches
#Texas,oil
#Texas,rock_festivals

s = TableFu.new(csv)
s.faceted_by("State").each do |state|
  puts state.row
end

#or even better

s.faceted_by("State").each do |state|
  puts state.row['attribute']
end

Yeah it's always gunna be a bit clunky for the one common column. but you can now do row[key] for all rows. and then you can accomplish this with:

s.faceted_by("State").map { |state|
   state.rows.map { |row| row['attribute'] }
}.flatten
# ['sunshine', 'beaches', 'oil', 'rock festivals']

Of course rather than all these hoops, you can also just grab the original table and loop through the rows[key]