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From "Pascal Schumacher (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (LANG-1269) Wrong name or result of StringUtils::getJaroWinklerDistance
Date Sun, 19 Mar 2017 13:25:42 GMT

     [ https://issues.apache.org/jira/browse/LANG-1269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Pascal Schumacher reopened LANG-1269:
-------------------------------------

> Wrong name or result of StringUtils::getJaroWinklerDistance
> -----------------------------------------------------------
>
>                 Key: LANG-1269
>                 URL: https://issues.apache.org/jira/browse/LANG-1269
>             Project: Commons Lang
>          Issue Type: Bug
>    Affects Versions: 3.3, 3.4, 3.5
>            Reporter: Jan Martin Keil
>            Assignee: Pascal Schumacher
>            Priority: Minor
>             Fix For: 3.6
>
>
> The name of the method StringUtils::getJaroWinklerDistance is misleading.
> Currently for equal strings {{1}} is returned, for completely different strings {{0}}
is returned. That is a measure of similarity, not of a distance. A distance must be {{0}}
for equal strings. I read on the issues LANG-591 and LANG-944, that it was decided to have
a similar name to StringUtils::getLevenshteinDistance, but that requires also the change of
the methods result.
> Could you please (1) rename the method to StringUtils::getJaroWinklerSimilarity or (2)
change the method to return {{1 - currentResult}}?
> First option has the disadvantage to lose the similar naming of the similar methods,
second option implies the risk to unnoticed introduce bugs in depending code. So I think it
is preferable to use the first option.



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