word count

word_count.rb

open('oreilly_web_20.txt').read.
  scan(/[^)(:;$*"@'>!\?\/,\s-]+/).
  map{|word| word.sub(/\.$/,'').downcase }.
  reject{|word| word.empty? }.
  inject(Hash.new(0)) { |hash, word|
  hash[word] += 1
  hash
}.sort{|a, b|
  (b[1] <=> a[1]) * 2 + (a[0] <=> b[0])
}.each do |array|
  puts array[0]+"\t"+array[1].to_s
end