selectively filtering word lists

remover.rb

require 'readline'

list1 = ARGV[0]
list2 = ARGV[1]

badwords = File.readlines(list1).map(&:strip)
words = File.readlines(list2).map(&:strip)

puts "remove #{ list1 } #{badwords.size} words from #{ list2 } #{ words.size }"

filter = []
badwords.each do |word|
  if words.include?(word)
    answer = Readline.readline("remove #{word}? ", false)
    if answer.size == 0
      filter << word
    else
      puts "keep #{ word }"
    end
  end
end

if filter.size > 0
  puts "DROPPING #{ filter.join(', ') }"

  File.open(list2, 'w') do |f|
    f.puts((words - filter).map {|w| "#{w}\n"})
  end
end