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https://issues.apache.org/jira/browse/COLLECTIONS-404?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Neidhart resolved COLLECTIONS-404.
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Resolution: Fixed
I think we should close it now as it is. It is a great addition, and when
collections 4 is done, I would love to work on a commons-diffutils component to
add more stuff which is probably out-of-scope for collections.
> 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
> Priority: Minor
> Fix For: 4.0
>
> Attachments: commons-collections-difference.patch,
> commons-collections-difference-v2.patch, comparator.zip, DiffTest.java
>
>
> 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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