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:
| 1 | <?php |
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| 16 | View Code Duplication | class LimitOperation implements IntermediateOperation |
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| 17 | { |
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| 18 | /** @var int */ |
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| 19 | private $limit; |
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| 20 | |||
| 21 | /** |
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| 22 | * @param int $limit |
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| 23 | */ |
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| 24 | 2 | public function __construct($limit) |
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| 28 | |||
| 29 | /** |
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| 30 | * @param mixed $input The element in the stream |
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| 31 | * @param mixed $index The index in the input iterator |
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| 32 | * @param IntermediateContext $context The solving context |
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| 33 | * |
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| 34 | * @return mixed |
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| 35 | */ |
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| 36 | 2 | public function apply($input, $index, IntermediateContext $context) |
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| 52 | } |
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| 53 |