From: "Ball, Donald A Jr (Library)" <donald.ball@...>
Date: 2007-04-23T03:11:35+09:00
Subject: Re: [QUIZ] Morse Code (#121)

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Below is my first solution to this quiz.

http://pastie.caboo.se/55736

- donald

# Ruby Quiz 121
# Donald A. Ball Jr.
# Version 1.0
class Morse

  CODES =3D {
    :A =3D> '.-',
    :N =3D> '-.',
    :B =3D> '-...',
    :O =3D> '---',
    :C =3D> '-.-.',
    :P =3D> '.--.',
    :D =3D> '-..',
    :Q =3D> '--.-',
    :E =3D> '.',
    :R =3D> '.-.',
    :F =3D> '..-.',
    :S =3D> '...',
    :G =3D> '--.',
    :T =3D> '-',
    :H =3D> '....',
    :U =3D> '..-',
    :I =3D> '..',
    :V =3D> '...-',
    :J =3D> '.---',
    :W =3D> '.--',
    :K =3D> '-.-',
    :X =3D> '-..-',
    :L =3D> '.-..',
    :Y =3D> '-.--',
    :M =3D> '--',
    :Z =3D> '--..'
  }

  LETTERS =3D CODES.invert

  def self.translate(cipher)
    results =3D []
    LETTERS.each_pair do |code, letter|
      next unless cipher.slice(0, code.length) =3D=3D code
      if cipher.length =3D=3D code.length
        results << letter.to_s
      else
        translate(cipher.slice(code.length, cipher.length)).each do =
|result|
          results << (letter.to_s << result)
        end
      end
    end
    results
  end

end

Morse.translate(ARGV[0]).each{|word| puts word}

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