Tom

doccsv.rb

# encoding: utf-8

require 'csv'

def is_suffix? name
  case name
  when "Jr"
    true
  when "JR"
    true
  when "II"
    true
  when "III"
    true
  when "IV"
    true
  else
    false
  end
end

first_names = []
last_names = []

CSV.foreach("doctor.csv", :encoding => "UTF-8") do |row|

  full_name = row[0]
  full_name = full_name.split(",").first.split(" ")

  first_names << full_name[1]

  last_name_or_suffix = full_name.slice(full_name.length-1)
  last_name_or_middle_name = full_name.slice(full_name.length-2)
  
  is_suffix?(last_name_or_suffix) ? last_names << last_name_or_middle_name : last_names << last_name_or_suffix

end

puts "FIRST NAMES"
puts first_names

puts "LAST NAMES"
puts last_names

line 35 is a 'ternary operator' if you haven't seen it before.

I like how you defined is_suffix?

It's mostly the same as what you did really. Oh yeah, and ruby is smart enough to iterate over an array automatically if you just 'puts array_name'