Python | 8 different short ways
\nclass Solution:\n    def getConcatenation(self, nums: List[int]) -> List[int]:\n        return nums * 2\n    \n        \'\'\'\n        Other short ways for li
```\nclass Solution:\n    def getConcatenation(self, nums: List[int]) -> List[int]:\n        return nums * 2\n    \n        \'\'\'\n        Other short ways for lists:\n        \n        2. return nums + nums\n        \n        3. return [*nums, *nums]\n        \n        4. nums.extend(nums)\n           return nums\n\n        5. return sum([nums, nums], [])\n                \n        6. return list(itertools.chain(nums, nums))\n        \n\t\t7. return list(chain(*repeat(nums, 2)))\n\n        8. import numpy as np\n           return list(np.concatenate((nums, nums)))\n        \'\'\'\n```
['Python']