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Posted to issues@commons.apache.org by "Thomas Neidhart (JIRA)" <ji...@apache.org> on 2012/07/14 23:48:35 UTC
[jira] [Commented] (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:comment-tabpanel&focusedCommentId=13414516#comment-13414516 ]
Thomas Neidhart commented on COLLECTIONS-404:
---------------------------------------------
Hi Luc,
what do you think of moving this contribution to the comparators.sequence package?
I think this would be a better fit than list.difference.
Thomas
p.s. I could do it myself together with other cleanups if you agree.
> 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: commons-collections-difference-v2.patch, commons-collections-difference.patch, 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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