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This is what ugly code looks like. It’s a dependency diagram—a representation of interdependence or coupling (the black lines) between software components (the grey dots) within a program. A high degree of interdependence means that changing one component inside the program could lead to cascading changes in all the other connected components, and in turn to changes in their dependencies, and so on.
Programs with this kind of structure are brittle, and hard to understand and fix. This dependency program was submitted anonymously to TheDailyWTF.com, where working programmers share “Curious Perversions in Information Technology” they find as they work. A user commented, “I found something just like that blocking the drain once.”
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