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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9 | trait ApiListTrait |
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10 | { |
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11 | /** |
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12 | * @param Request $request |
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13 | * @return mixed |
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14 | */ |
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15 | abstract function dispatch(Request $request); |
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16 | |||
17 | /** |
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18 | * @override |
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19 | * @inheritDoc |
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20 | */ |
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21 | 1 | View Code Duplication | public function blPop(array $keys, $timeout) |
43 | |||
44 | /** |
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45 | * @override |
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46 | * @inheritDoc |
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47 | */ |
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48 | 1 | View Code Duplication | public function brPop(array $keys, $timeout) |
70 | |||
71 | /** |
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72 | * @override |
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73 | * @inheritDoc |
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74 | */ |
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75 | 1 | public function brPopLPush($src, $dst, $timeout) |
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83 | |||
84 | /** |
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85 | * @override |
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86 | * @inheritDoc |
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87 | */ |
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88 | 5 | public function lIndex($key, $index) |
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96 | |||
97 | /** |
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98 | * @override |
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99 | * @inheritDoc |
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100 | */ |
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101 | 1 | public function lInsert($key, $action, $pivot, $value) |
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109 | |||
110 | /** |
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111 | * @override |
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112 | * @inheritDoc |
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113 | */ |
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114 | 1 | View Code Duplication | public function lLen($key) |
122 | |||
123 | /** |
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124 | * @override |
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125 | * @inheritDoc |
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126 | */ |
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127 | 1 | View Code Duplication | public function lPop($key) |
135 | |||
136 | /** |
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137 | * @override |
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138 | * @inheritDoc |
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139 | */ |
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140 | 15 | public function lPush($key,...$values) |
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147 | |||
148 | 1 | public function lPushX($key, $value) |
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155 | |||
156 | /** |
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157 | * @override |
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158 | * @inheritDoc |
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159 | */ |
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160 | 1 | View Code Duplication | public function lRange($key, $start = 0, $stop = -1) |
167 | |||
168 | /** |
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169 | * @override |
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170 | * @inheritDoc |
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171 | */ |
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172 | 1 | public function lRem($key, $count, $value) |
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180 | |||
181 | /** |
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182 | * @override |
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183 | * @inheritDoc |
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184 | */ |
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185 | 1 | public function lSet($key, $index, $value) |
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193 | |||
194 | /** |
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195 | * @override |
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196 | * @inheritDoc |
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197 | */ |
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198 | 1 | public function lTrim($key, $start, $stop) |
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206 | |||
207 | /** |
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208 | * @override |
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209 | * @inheritDoc |
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210 | */ |
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211 | 1 | View Code Duplication | public function rPop($key) |
218 | |||
219 | /** |
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220 | * @override |
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221 | * @inheritDoc |
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222 | */ |
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223 | 1 | View Code Duplication | public function rPopLPush($src, $dst) |
231 | |||
232 | /** |
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233 | * @override |
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234 | * @inheritDoc |
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235 | */ |
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236 | 2 | public function rPush($key, ...$values) |
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244 | |||
245 | /** |
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246 | * @override |
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247 | * @inheritDoc |
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248 | */ |
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249 | 1 | public function rPushX($key, $value) |
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256 | } |
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257 |
Adding explicit visibility (
private
,protected
, orpublic
) is generally recommend to communicate to other developers how, and from where this method is intended to be used.