top_combined.rb

#!/usr/bin/env ruby -w

require 'rubygems'
require 'Text'

results = {}

Dir.glob("top100_*.txt") do |filename|
  File.read(filename).split("\n").each do |song|
    stripped = song.gsub(/[^a-z0-9]/, '').downcase
    added = false
    results.each_key do |key|
      if Text::Levenshtein.distance(key, stripped) < 2
        results[key][:count] += 1
        added = true
      end
    end
    if !added
      results[stripped] = {:count => 1, :name => song}
    end
  end
end

results.sort{|a,b| b[1][:count]<=>a[1][:count]}.slice(0,2).each { |elem|
  puts "#{elem[1][:count]}, #{elem[1][:name]}"
}