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From "Luc Maisonobe (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (COLLECTIONS-404) Adding an implementation of Eugene Myers difference algorithm
Date Mon, 09 Apr 2012 14:05:19 GMT
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


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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