Module: Text::Metaphone

Extended by:
Metaphone
Included in:
Metaphone
Defined in:
lib/text/metaphone.rb,
lib/text/double_metaphone.rb

Overview

:nodoc:

Defined Under Namespace

Modules: Rules

Instance Method Summary collapse

Instance Method Details

#double_metaphone(str) ⇒ Object

Returns the primary and secondary double metaphone tokens (the secondary will be nil if equal to the primary).



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# File 'lib/text/double_metaphone.rb', line 16

def double_metaphone(str)
  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 = double_metaphone_lookup(original, current, length, last)
    primary << a if a
    secondary << b if b
    current += c if c
  end
  primary, secondary = primary.join("")[0, 4], secondary.join("")[0, 4]
  return primary, (primary == secondary ? nil : secondary)
end

#metaphone(str, options = {}) ⇒ Object

Returns the Metaphone representation of a string. If the string contains multiple words, each word in turn is converted into its Metaphone representation. Note that only the letters A-Z are supported, so any language-specific processing should be done beforehand.

If the :buggy option is set, alternate ‘buggy’ rules are used.



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# File 'lib/text/metaphone.rb', line 79

def metaphone(str, options={})
  return str.strip.split(/\s+/).map { |w| metaphone_word(w, options) }.join(' ')
end