Easy Python two liner code
\nclass Solution:\n    def getConcatenation(self, nums: List[int]) -> List[int]:\n        nums.extend(nums)\n        return nums\n\nThe extend() method adds all
```\nclass Solution:\n    def getConcatenation(self, nums: List[int]) -> List[int]:\n        nums.extend(nums)\n        return nums\n```\nThe extend() method adds all the element of an iterable ( list , tuple , string etc.) to the end of the list.\n.\n.\n.\n.\n.\nPlease Up-vote if you like my post
['Array', 'Python', 'Python3']