Listing 9 shows the refactored number classifier.

清单9中显示了重构的数字分类器。

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Listing 1 shows the number classifier written in an imperative style.

清单1展示了用命令式风格编写的数字分类器。

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To solve the number classifier, I had to discern exactly how to gather factors, which in turn means I had to write the specific code to loop through Numbers to determine factors.

要解决数字分类器问题，必须准确辨别如何搜集因子，这意味着必须编写特定代码来遍历数字，从而确定因子。

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