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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9 | class Message extends ClientObject |
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10 | { |
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11 | /** |
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12 | * Gets the message text. |
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13 | * |
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14 | * @return string |
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15 | */ |
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16 | 2 | public function getText() |
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21 | /** |
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22 | * Checks if Markdown is enabled for the message text. |
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23 | * |
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24 | * @return bool |
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25 | */ |
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26 | public function isMarkdownEnabled() |
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30 | |||
31 | /** |
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32 | * Checks if the message has attachments. |
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33 | * |
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34 | * @return bool True if the message has attachments, otherwise false. |
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35 | */ |
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36 | 3 | public function hasAttachments() |
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40 | |||
41 | /** |
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42 | * Gets all message attachments. |
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43 | * |
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44 | * @return Attachment[] |
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45 | */ |
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46 | 2 | public function getAttachments() |
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50 | |||
51 | /** |
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52 | * Gets the channel the message is in. |
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53 | * |
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54 | * @return \React\Promise\PromiseInterface |
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55 | */ |
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56 | 2 | public function getChannel() |
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60 | |||
61 | /** |
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62 | * Gets the user that sent the message. |
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63 | * |
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64 | * @return \React\Promise\PromiseInterface |
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65 | */ |
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66 | 2 | public function getUser() |
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70 | |||
71 | /** |
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72 | * {@inheritDoc} |
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73 | */ |
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74 | View Code Duplication | public function jsonUnserialize(array $data) |
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84 | } |
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85 |
If the size of the collection does not change during the iteration, it is generally a good practice to compute it beforehand, and not on each iteration: