Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
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| 11 | View Code Duplication | class TestHandlerFactory implements FactoryInterface |
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| 12 | { |
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| 13 | 1 | public function __invoke(array $options) |
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| 23 | } |
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