[jira] [Updated] (LANG-1199) Fix implementation of StringUtils.getJaroWinklerDistance()

["Pascal Schumacher (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LANG-1199?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Pascal Schumacher updated LANG-1199:
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    Summary: Fix implementation of StringUtils.getJaroWinklerDistance()  (was: Incorrect implementation of StringUtils.getJaroWinklerDistance())

> Fix implementation of StringUtils.getJaroWinklerDistance()
> ----------------------------------------------------------
>
>                 Key: LANG-1199
>                 URL: https://issues.apache.org/jira/browse/LANG-1199
>             Project: Commons Lang
>          Issue Type: Bug
>          Components: lang.*
>    Affects Versions: 3.4
>            Reporter: M. Steiger
>
> The current implementation of StringUtils.getJaroWinklerDistance() does not compute the correct result in some cases. See #LANG-944 for the initial code contribution.
> StringUtils.getJaroWinklerDistance("Haus Ingeborg", "Ingeborg Esser") == 0.0
> This is due to the incorrect computation of common characters, which causes the algorithm to exit prematurely.
> In contrast, the implementation in Lucene gives ~0.63, which is about right.
>     JaroWinklerDistance d = new JaroWinklerDistance();
>     getDistance("Haus Ingeborg", "Ingeborg Esser");
> See https://lucene.apache.org/core/3_0_3/api/contrib-spellchecker/org/apache/lucene/search/spell/JaroWinklerDistance.html



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