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An empirical investigation of the influence of a type of side effects on program comprehension

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4 Author(s)
Dolado, J.J. ; Dept. of Comput. Languages & Syst., Univ. of the Basque Country, San Sebastian, Spain ; Harman, M. ; Otero, M.C. ; Hu, L.

This paper reports the results of a study on the impact of a type of side effect (SE) upon program comprehension. We applied a crossover design on different tests involving fragments of C code that include increment and decrement operators. Each test had an SE version and a side-effect-free counterpart. The variables measured in the treatments were the number of correct answers and the time spent in answering. The results show that the side-effect operators considered significantly reduce performance in comprehension-related tasks, providing empirical justification for the belief that side effects are harmful.

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Software Engineering, IEEE Transactions on  (Volume:29 ,  Issue: 7 )