commons-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Eli Lindsey (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LANG-684) Levenshtein Distance Within a Given Threshold
Date Mon, 07 Mar 2011 20:07:59 GMT

     [ https://issues.apache.org/jira/browse/LANG-684?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eli Lindsey updated LANG-684:
-----------------------------

    Attachment: LevenshteinDistanceWithThreshold.patch

> Levenshtein Distance Within a Given Threshold
> ---------------------------------------------
>
>                 Key: LANG-684
>                 URL: https://issues.apache.org/jira/browse/LANG-684
>             Project: Commons Lang
>          Issue Type: New Feature
>          Components: lang.*
>    Affects Versions: 3.1
>            Reporter: Eli Lindsey
>            Priority: Minor
>         Attachments: LevenshteinDistanceWithThreshold.patch
>
>
> It'd be nice to have a function that calculates the Levenshtein distance only if it's
within some integer threshold.  
> Oftentimes you care less about the actual LD and more about it being within a certain
range.  This common, limited computation can be performed much faster than the normal unbounded
LD method; instead of O(nm), you can do it in O(km) (n and m are string lengths, k is the
threshold).
> Also, providing a function like this makes it easier for library users to rewrite the
unbounded Levenshtein function to run in O(dm) time (d is the edit distance) if necessary.
> I'm attaching a patch that implements this function and adds appropriate test cases.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message