You can see this in the number and names of methods in the solution driven by TDD. Here are the methods in the final version of the TDD perfect-number categorizer
在 TDD 驱动的解决方案中，方法的数量和名称反映了这种思想。
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This paper introduces the design and implementation of the Chinese text categorizer based on the fuzzy recognition and the extraction of the characteristic vector with the vector space model.