in reply to Searching for duplication in legacy code
Check out http://blogs.perl.org/users/ovid/2012/12/more-on-finding-duplicate-code-in-perl.html and the previous http://blogs.perl.org/users/ovid/2012/12/finding-duplicate-code-in-perl.html .
The latest version is at Code-CutNPaste .
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Seekers of Perl Wisdom