SPLASH Workshops 2018
2018 ACM SIGPLAN International Conference on Systems, Programming, Languages, and Applications: Software for Humanity (SPLASH Workshops 2018)
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2018 ACM SIGPLAN SPLASH-E Workshop (SPLASH-E 2018), November 5, 2018, Boston, MA, USA

SPLASH-E 2018 – Proceedings

Contents - Abstracts - Authors

2018 ACM SIGPLAN SPLASH-E Workshop (SPLASH-E 2018)


Title Page

Message from the Chairs


A Framework for Code-Level Tracing of Map-Based Algorithm Visualizations
James D. Teresco, Michael A. Dagostino Jr., Abdul Samad, and Eric D. Sauer
(Siena College, USA)

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LambdaLab: An Interactive λ-Calculus Reducer for Learning
Daniel Sainati and Adrian Sampson
(Cornell University, USA)

In advanced programming languages curricula, the λ-calculus often serves as the foundation for teaching the formal concepts of language syntax and semantics. LambdaLab is an interactive tool that helps students practice λ-calculus reduction and build intuition for its behavior. To motivate the tool, we survey student answers to λ-calculus assignments in three previous classes and sort mistakes into six categories. LambdaLab addresses many of these problems by replicating the experience of working through examples with an instructor. It uses visualizations to convey AST structure and reducible expressions, interactive reduction to support self-guided practice, configurable reduction strategies, and support for encodings via a simple macro system. To mimic informal, in-class treatment of macros, we develop a new semantics that describes when to expand and contract them. We use case studies to describe how LambdaLab can fit into student workflows and address real mistakes.

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