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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6 | View Code Duplication | class DiffStart extends DiffLineHandle |
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7 | { |
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9 | public function handle($line) |
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21 | public function isValid($line) |
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25 | } |
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