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Posted to issues@commons.apache.org by "Luc Maisonobe (Updated) (JIRA)" <ji...@apache.org> on 2012/04/09 16:07:17 UTC
[jira] [Updated] (COLLECTIONS-404) Adding an implementation of
Eugene Myers difference algorithm
[ https://issues.apache.org/jira/browse/COLLECTIONS-404?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Luc Maisonobe updated COLLECTIONS-404:
--------------------------------------
Attachment: comparator.zip
The comparator.zip file is an implementation of Eugene Myers difference algorithm developed at CS Systèmes d'Information. A Software Grant has been signed by CS to contribute this implementation to the Apache Software Foundation. As of 2012-04-09, the Software Grand is already on file.
> Adding an implementation of Eugene Myers difference algorithm
> -------------------------------------------------------------
>
> Key: COLLECTIONS-404
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-404
> Project: Commons Collections
> Issue Type: Improvement
> Components: Collection
> Affects Versions: 3.2.1
> Environment: all
> Reporter: Luc Maisonobe
> Assignee: Luc Maisonobe
> Priority: Minor
> Attachments: comparator.zip
>
>
> The difference algorithm aims at comparing two sequences of objects and return an "edit script" which represents how one can transform the first sequence into the second sequence. The script describes the various insert object, delete object and keep object commands. The script is guaranteed to be the shortest possible in terms of number of commands.
> From the script, one can either extract longest common sub-sequences (i.e. how similar the sequences are) or on the contrary the needed changes (i.e. how different the sequences are).
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