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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21 | View Code Duplication | final class OSX implements Server |
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22 | { |
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23 | private $cpu; |
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24 | private $memory; |
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25 | private $processes; |
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26 | private $loadAverage; |
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27 | private $disk; |
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29 | 4 | public function __construct(TimeContinuumInterface $clock) |
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38 | public function cpu(): Cpu |
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42 | |||
43 | public function memory(): Memory |
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52 | 1 | public function loadAverage(): LoadAverage |
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57 | 1 | public function disk(): Disk |
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61 | } |
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62 |