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- Arie van Deursen, Leon Moonen, Alex van den Bergh, Gerard Kok
- 2001

Two key aspects of extreme programming (XP) are unit testing and merciless refactoring. Given the fact that the ideal test code / production code ratio approaches 1:1, it is not surprising that unit tests are being refactored. We found that refactoring test code is different from refactoring production code in two ways: (1) there is a distinct set of bad… (More)

- Frédéric Chyzak, Michael Drmota, Thomas Klausner, Gerard Kok
- Combinatorics, Probability & Computing
- 2008

Let Tn denote the set of unrooted labeled trees of size n and let M be a particular (finite, unlabeled) tree. Assuming that every tree of Tn is equally likely, it is shown that the limiting distribution as n goes to infinity of the number of occurrences of M as an induced subtree is asymptotically normal with mean value and variance asymptotically… (More)

- Gerard Kok
- 2005

Let Tn denote the set of unrooted unlabeled trees of size n and let M be a particular (finite) tree. Assuming that every tree of Tn is equally likely, it is shown that the number of occurrences Xn of M as an induced sub-tree satisfies E Xn ∼ µn and Var Xn ∼ σ 2 n for some (computable) constants µ > 0 and σ ≥ 0. Furthermore, if σ > 0 then (Xn − E Xn)/ √ Var… (More)

- A. van den Bergh, G. Kok, Arie van Deursen, Leon Moonen, Alex van den Bergh, Gerard Kok
- 2001

Two key aspects of extreme programming XP are unit testing and merciless refactoring. Given the fact that the ideal test code production code ratio approaches 1:1, it is not surprising that unit tests are being refactored. We found that refactoring test code is diierent from refactoring production code in two w ays: 1 there is a distinct set of bad smells… (More)

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