Module: Philiprehberger::FuzzyMatch::JaroWinkler

Defined in:
lib/philiprehberger/fuzzy_match/jaro_winkler.rb

Constant Summary collapse

WINKLER_PREFIX_WEIGHT = 
0.1
MAX_PREFIX_LENGTH = 
4

Class Method Summary collapse

Class Method Details

.similarity(str_a, str_b) ⇒ Object 



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# File 'lib/philiprehberger/fuzzy_match/jaro_winkler.rb', line 9

def self.similarity(str_a, str_b)
  a = str_a.to_s.downcase
  b = str_b.to_s.downcase

  return 1.0 if a == b
  return 0.0 if a.empty? || b.empty?

  jaro = jaro_similarity(a, b)
  prefix_len = common_prefix_length(a, b)
  jaro + (prefix_len * WINKLER_PREFIX_WEIGHT * (1.0 - jaro))
end