Code Duplication    Length = 4-4 lines in 2 locations

DataStructures/Lists/SimpleLinkedList.php 2 locations

@@ 69-72 (lines=4) @@
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        $current = $this->head;
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        $i = 0;
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        while($i < $index && $current->next !== null) {
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            $current = $current->next;
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            $i++;
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        }
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        return $current;
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    }
@@ 294-297 (lines=4) @@
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        $i = 0;
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        $current = $this->head;
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        $prev = $current;
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        while($i < $index && $current->next !== null) {
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            $prev = $current;
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            $current = $current->next;
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        }
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        if($index === $this->size - 1) {
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            $prev->next = null;