Anagram Kata Ruby - http://codekata.com/kata/kata06-anagrams/

anagram_kata.rb

class Anagram
  attr_reader :results

  def initialize(word_list)
    file = File.open(word_list).read

    @words_hash_map = {}
    @words_array = []
    @results = {}

    puts "Loading file..."

    file.each_line do |line|
      chomped_line = line.chomp
      sorted = sorted_word(chomped_line)

      if @words_hash_map[sorted].is_a? Array
        @words_hash_map[sorted] << chomped_line
      else
        @words_hash_map[sorted] = [chomped_line]
      end
      @words_array << chomped_line
    end
  end

  def anagrams
    start_time = Time.now

    puts "Calculating..."

    @words_array.each do |word|
      sorted = sorted_word(word)

      @results[sorted] = @words_hash_map[sorted]
    end

    @results.reject! { |key, value| value.count == 1 }

    "Took: #{Time.now - start_time} seconds"
  end

  private

  def sorted_word(word)
    word.split('').sort.join
  end
end