# By alan snape
# All rights reserved.

module FunWithStrings
  def palindrome?
    str = self.downcase.gsub(/(\W|\d)/, '')
    return str == str.reverse
  end
  def count_words
    w = {}
    self.downcase.split(/\W+/).each do |i|
      w.has_key?(i) ? w[i] += 1 : w[i] = 1
    end
    w.delete("")
    return w
  end
  def anagram_groups
    w = {}
    self.split.each do |s| 
      i = s.downcase.chars.sort.join
      w.has_key?(i) ? w[i].push(s) : w[i] = [s]
    end
    return w.values
  end
end

# make all the above functions available as instance methods on Strings:

class String
  include FunWithStrings
end