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Fowler has a
long list of problems with code. He
calls them bad smells, because something is rotten and stinks. Here are just a couple of examples.
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Code duplication
often arises from copy and past programming.
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A long method
may be trying to do too many things at once and should instead be
coordinating several other methods that whittle away at the task. Does anyone have a recommendation on how
long a method should be?
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Long parameter
lists are often difficult to understand.
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The author
compares comments to deodorant. He
says that they cover up the smell, but don’t really remove it.
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A lazy class is
one that doesn’t do enough work. Our
example might be like this. It has
only one method and that is a class method.
There are no instance or even class variables.
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