VPL - similarity always 0 results

VPL - similarity always 0 results

by Garth Brady -
Number of replies: 6

Greetings all,

The similarity function in VPL does not seem to be working for me.  I always get 0 results even if 2 students submit identical code...  I've resorted to using an alternative plagiarism detection method.  Is there a php function that must be enabled?  It's odd that no error is reported despite the constant 0 results.

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In reply to Garth Brady

Re: VPL - similarity always 0 results

by Juan Carlos Rodríguez-del-Pino -
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Dear Garth,
notice that similarity features are available for these languages: C, CPP, Java, Scala, Ada, Scheme, Python, Prolog, Matlab, and HTML.
what programming languages are using the students?

Best regards,
juan carlos.
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In reply to Juan Carlos Rodríguez-del-Pino

Re: VPL - similarity always 0 results

by Garth Brady -
The students are using php... It's worked in the past but unfortunately that does not seem to be on the list sad Can I add it somehow?
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In reply to Garth Brady

Re: VPL - similarity always 0 results

by Juan Carlos Rodríguez-del-Pino -
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Dear Garth.
I have added "Support of PHP similarity search" on the TODO list.
Best regards,
Juan Carlos.


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In reply to Juan Carlos Rodríguez-del-Pino

Re: VPL - similarity always 0 results

by Garth Brady -
It's strange because the Similarity function used to work for php but it doesn't any longer. Is this a file I can tweak myself? It looks like I just need to create tokenizer_php.php and similarity_php.php files... If I use cpp as a model, is this likely to work?
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In reply to Garth Brady

Re: VPL - similarity always 0 results

by Juan Carlos Rodríguez-del-Pino -
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Dear Garth,
to use the C++ parser with php files you only need to modify the similarity/similarity_factory_class.php adding the key/value 'php' => 'cpp' to the $sstr array.

Please,  Let me know if its worth to use in the official VPL version.

Best regards and apologies for the delayed answer.
Juan Carlos.

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In reply to Juan Carlos Rodríguez-del-Pino

Re: VPL - similarity always 0 results

by Garth Brady -
Hi Juan,

Yes, that worked flawlessly! Thank you so much! It's such a useful tool! Again, very much appreciated!
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