Module: RubyFish::DoubleMetaphone

Extended by:
DoubleMetaphone
Included in:
DoubleMetaphone
Defined in:
lib/rubyfish/double_metaphone.rb

Overview

stolen from english.rubyforge.org/

Instance Method Summary collapse

Instance Method Details

#phonetic_code(string) ⇒ Object 



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# File 'lib/rubyfish/double_metaphone.rb', line 6

def phonetic_code string
  str = string.to_s
  primary, secondary, current = '', '', 0
  original, length, last = "#{str}     ".upcase, str.length, str.length - 1
  if /^GN|KN|PN|WR|PS$/ =~ original[0, 2]
    current += 1
  end
  if 'X' == original[0, 1]
    primary << 'S'
    secondary << 'S'
    current += 1
  end
  while primary.length < 4 || secondary.length < 4
    break if current > str.length
    a, b, c = lookup(original, current, length, last)
    primary << a if a
    secondary << b if b
    current += c if c
  end
  primary, secondary = primary[0, 4], secondary[0, 4]
  [primary, (primary == secondary ? nil : secondary)]
end