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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| 7 | private $config; |
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| 9 | public function __construct( array $args = array() ) |
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| 16 | View Code Duplication | public function add_menu_page() |
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| 29 | private function default_args() |
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