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A comment on Visualizing 40,000 student code submissions.

Re:Visualizing 40,000 student code submissions by RVijay007 on Tuesday October 08, 2013 @03:43AM (#6513526)
Probably also allows them to more easily detect cheating on coding assignments.
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Re:Visualizing 40,000 student code submissions by mcherm on Tuesday October 08, 2013 @07:20AM (#6514094)
No, comparison of text rather than comparison of ASTs is is better for that purpose. There are many good reasons for ASTs to be equivalent and few good reasons for text to match.
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