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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11 | class Node extends \stdClass |
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12 | { |
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13 | /** |
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14 | * The processed data |
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15 | * @var mixed |
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16 | */ |
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17 | protected $i_result; |
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18 | |||
19 | /** |
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20 | * Class constructor |
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21 | * |
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22 | * @param \stdClass $data |
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23 | */ |
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24 | 5 | public function __construct(\stdClass $data) |
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25 | { |
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26 | 5 | $this->i_result = $data; |
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27 | |||
28 | 5 | foreach ($data as $key => $value) { |
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29 | 5 | if ($key === 'i_result') { |
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30 | continue; |
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31 | } |
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32 | |||
33 | 5 | $this->$key = $value; |
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34 | 5 | } |
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35 | 5 | } |
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36 | |||
37 | |||
38 | /** |
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39 | * Replace nodes with their results |
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40 | * |
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41 | * @param array|object $target |
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42 | */ |
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43 | 1 | View Code Duplication | protected function applyNodeResults(&$target) |
44 | { |
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45 | if ($target instanceof self) { |
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46 | $target = $target->getResult(); |
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47 | $this->applyNodeResults($target); |
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48 | 1 | } elseif (is_array($target) || is_object($target)) { |
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49 | foreach ($target as &$value) { |
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50 | $this->applyNodeResults($value); |
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51 | } |
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52 | } |
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53 | } |
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54 | |||
55 | /** |
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56 | * Get the processed result |
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57 | * |
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58 | * @return mixed |
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59 | */ |
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60 | public function getResult() |
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75 | |||
76 | /** |
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77 | * Set the result after processing |
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78 | * |
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79 | * @param mixed $result |
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80 | */ |
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81 | public function setResult($result) |
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85 | |||
86 | |||
87 | /** |
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88 | * Test if the node has an instruction for a processor |
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89 | * |
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90 | * @param Processor $processor |
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91 | * @return boolean |
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92 | */ |
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93 | public function hasInstruction(Processor $processor) |
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98 | |||
99 | /** |
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100 | * Get an instruction for a processor |
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101 | * |
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102 | * @param Processor $processor |
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103 | * @return mixed |
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104 | */ |
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105 | 5 | public function getInstruction(Processor $processor) |
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115 | |||
116 | /** |
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117 | * Resolve nodes within the value |
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118 | * |
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119 | * @param mixed $value |
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120 | * @return mixed |
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121 | */ |
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122 | 5 | View Code Duplication | protected function resolve($value) |
136 | |||
137 | /** |
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138 | * Apply processing to this node |
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139 | * |
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140 | * @param Processor $processor |
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141 | */ |
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142 | public function apply(Processor $processor) |
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156 | } |
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157 |