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Code cloning is a controversial software engineering practice due to contradictory claims regarding its impacts on software evolution and maintenance. While a number of studies identify some positive aspects of code clones, there is strong empirical evidence of some negative impacts of clones too. Focusing on the issues related to clones researchers suggest to manage code clones through detection,...
Code clones are identical or similar code fragments in a code base. A group of code fragments that are similar to one another forms a clone class. Clone fragments from the same clone class often need to be changed together consistently and thus, they exhibit evolutionary coupling. Evolutionary coupling among clone fragments within a clone class has already been investigated and reported. However,...
If two or more program entities change together (i.e., co-change) frequently (i.e., in many commits) during software evolution, it is likely that the entities are related and we say that the entities are showing evolutionary coupling. Association rules have been used to express evolutionary coupling and two related measures, support and confidence, have been used to measure the strength of coupling...
In this paper, we present an in-depth empirical study on identifying clone fragments that can be important refactoring candidates. We mine association rules among clones in order to detect clone fragments that belong to the same clone class and have a tendency of changing together during software evolution. The idea is that if two or more clone fragments from the same class often change together (i...
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