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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| 8 | View Code Duplication | final class Usage |
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| 10 | private $value; |
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| 12 | 6 | public function __construct(float $value) |
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| 21 | 2 | public function toFloat(): float |
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| 26 | 1 | public function __toString(): string |
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| 30 | } |
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