Find the word with most anagrams

anagrams.rb

# pat, tap, apt


def find_longest_anagram()
    words = File.open('/usr/share/dict/words').read
    anagrams = Hash.new { [] }

    most_so_far = 0
    most_signature = nil
    
    words.each_line do |word|
        word = word.strip.downcase
        signature = word.split('').sort.join('')
        anagrams[signature] <<= word
        anagrams[signature] = anagrams[signature] & anagrams[signature]
        if anagrams[signature].length > most_so_far
            most_signature = signature
            most_so_far = anagrams[signature].length
        end
    end

    return anagrams[most_signature]
end

puts find_longest_anagram.inspect