Class: Mnemonicker::MajorSystem

Inherits:
Object
  • Object
show all
Defined in:
lib/mnemonicker/major_system.rb

Constant Summary collapse

MAPPINGS = 
{
  'S' => 0,
  '0' => 1,
  'T' => 1,
  'D' => 1,
  'N' => 2,
  'M' => 3,
  'R' => 4,
  'L' => 5,
  'J' => 6,
  'K' => 7,
  'F' => 8,
  'V' => 8,
  'P' => 9,
  'B' => 9,
  'X' => 6,
  'A' => nil,
  'W' => nil,
  'H' => nil
}

Class Method Summary collapse

Class Method Details

.word_to_number(word) ⇒ Object 



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# File 'lib/mnemonicker/major_system.rb', line 24

def self.word_to_number(word)
  # Metaphone is insufficient since it has a maximum length of six, which
  # does not work for long words like "hindquarters" or "manufacturing".
  #
  # Best phonetic algorithm I have found though.
  metaphone = RubyFish::DoubleMetaphone.phonetic_code(word)[0]
  metaphone.gsub!(/KS$/, "")    # fox    => FKS  => F
  metaphone.gsub!(/RNK$/, "RK") # turing => TRNK => TRK
  n = ""
  metaphone.each_char do |c|
    if MAPPINGS.has_key?(c)
      n << MAPPINGS[c].to_s if MAPPINGS[c]
    else
      raise "No mapping for #{c}"
    end
  end
  n
end