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Module: DidYouMean::JaroWinkler

Relationships & Source Files
Defined in:	lib/did_you_mean/jaro_winkler.rb

Constant Summary

THRESHOLD =
# File 'lib/did_you_mean/jaro_winkler.rb', line 63
```
0.7
```
WEIGHT =
# File 'lib/did_you_mean/jaro_winkler.rb', line 62
```
0.1
```

Class Method Summary

.distance(str1, str2) mod_func

Class Method Details

.distance(str1, str2) (mod_func)

[ GitHub ]

# File 'lib/did_you_mean/jaro_winkler.rb', line 67


def distance(str1, str2)
  jaro_distance = Jaro.distance(str1, str2)

  if jaro_distance > THRESHOLD
    codepoints2  = str2.codepoints
    prefix_bonus = 0

    str1.each_codepoint do |char1|
      char1 == codepoints2[prefix_bonus] && prefix_bonus < 4 ? prefix_bonus += 1 : break
    end

    jaro_distance + (prefix_bonus * WEIGHT * (1 - jaro_distance))
  else
    jaro_distance
  end
end