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Posted to issues@commons.apache.org by "Henri Yandell (JIRA)" <ji...@apache.org> on 2014/01/22 09:20:20 UTC
[jira] [Comment Edited] (LANG-936)
StringUtils.getLevenshteinDistance with too big of a threshold returns
wrong result
[ https://issues.apache.org/jira/browse/LANG-936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13878391#comment-13878391 ]
Henri Yandell edited comment on LANG-936 at 1/22/14 8:20 AM:
-------------------------------------------------------------
Thanks Yaniv + Eli :)
svn ci -m "Applying Eli Lindsey's patch to Yaniv Kunda's report in LANG-936 that StringUtils.getLevensteinDistance(String, String, int) gave the wrong answer when the int threshold is near Integer.MAX_VALUE" .
Sending src/changes/changes.xml
Sending src/main/java/org/apache/commons/lang3/StringUtils.java
Sending src/test/java/org/apache/commons/lang3/StringUtilsTest.java
Transmitting file data ...
Committed revision 1560275.
was (Author: bayard):
Thanks Yanix + Eli :)
svn ci -m "Applying Eli Lindsey's patch to Yaniv Kunda's report in LANG-936 that StringUtils.getLevensteinDistance(String, String, int) gave the wrong answer when the int threshold is near Integer.MAX_VALUE" .
Sending src/changes/changes.xml
Sending src/main/java/org/apache/commons/lang3/StringUtils.java
Sending src/test/java/org/apache/commons/lang3/StringUtilsTest.java
Transmitting file data ...
Committed revision 1560275.
> StringUtils.getLevenshteinDistance with too big of a threshold returns wrong result
> -----------------------------------------------------------------------------------
>
> Key: LANG-936
> URL: https://issues.apache.org/jira/browse/LANG-936
> Project: Commons Lang
> Issue Type: Bug
> Components: lang.*
> Affects Versions: 3.1
> Reporter: Yaniv Kunda
> Priority: Minor
> Fix For: 3.3
>
>
> StringUtils.getLevenshteinDistance(CharSequence s, CharSequence t, int threshold) specifies:
> {quote}
> {{Find the Levenshtein distance between two Strings if it's _+*less than or equal to*+_ a given threshold.}}
> {quote}
> When passing a threshold > *Integer.MAX_VALUE - max(s.length(), t.length())* the method always returns -1.
> The simplest use case is passing *Integer.MAX_VALUE* (a common practice if one would want to find the min/max LD of a string to several other strings in an iterative fashion.
> The code should be fixed to consider the threshold in relation to the source/target lengths, or alternatively the javadoc should be fixed to pronounce the current limit.
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