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  1. Scientific Workshop Proceedings of the XP2015 (XP '15 workshops)
  2. An exploration of the 'introduce explaining variable' refactoring
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An exploration of the 'introduce explaining variable' refactoring

Content Provider ACM Digital Library
Author Liu, X. Herold, S. Buckley, J. Eldh, S. Ermedahl, A. Counsell, S. Swift, S. English, M.
Abstract While we know much about refactoring trends and their occurrence in open-source and proprietary systems, we still know little about their association with defects or the nature of classes where refactoring is applied. In this paper, we explore one such refactoring, "Introduce explaining variable" (IEV), a low-level code based refactoring which simplifies a complex expression through the introduction of added variables. We explore the possibility that this type of refactoring, requiring manipulation of variables and constructs will have a greater association with defects than other types of refactoring. Classes where they are applied will have lower coupling levels. Five releases from two projects of Eclipse were used to support this analysis and tools to extract both the set of class refactorings and class coupling and size metrics supported the analysis. Results showed that for four out of the five releases studied, classes where the IEV refactoring had been applied were more defect-prone than other classes. Coupling in the same set of classes was higher in all five releases. Size, on the other hand, may be a confounding factor but tentative results suggest that areas of code where this refactoring had been applied are indicative of defect-prone code.
Starting Page 1
Ending Page 5
Page Count 5
File Format PDF
ISBN 9781450334099
DOI 10.1145/2764979.2764988
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2015-05-25
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Variable Coupling Refactoring Defects
Content Type Text
Resource Type Article
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