Benjamin Lerner

Combining Interactive and Whole-Program Editing with Repartee

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Luna Phipps-Costin, Michael MacLeod, Alex Vo, Tiffany Nguyen, Joe Politz, Shriram Krishnamurthi and Benjamin Lerner


Interactive evaluation with a REPL (Read-Eval-Print Loop) is a feature of many programming environments, especially in environments for teaching programming. However, REPLs do have confusions and stumbles for beginners related to navigating between programs and interactive evaluation. We identify several specific weaknesses of REPLs with a worked example from an existing programming environment in active use, distilled from our experience with novices. We then present an updated programming environment that mitigates these weaknesses by combining the program editor and REPL, so the user can benefit from the best of both.



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West Village H, Office 326
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Northeastern University
Khoury College of Computer Sciences
360 Huntington Ave, 2nd floor
Boston, MA 02115
work Lecturer Office 326