Python - One Line (x4)! + Multiple Solutions!
Solution:\n\nclass Solution:\n    def getConcatenation(self, nums):\n        return nums + nums\n\n\nSolution:\n\nclass Solution:\n    def getConcatenation(self
**Solution**:\n```\nclass Solution:\n    def getConcatenation(self, nums):\n        return nums + nums\n```\n\n**Solution**:\n```\nclass Solution:\n    def getConcatenation(self, nums):\n        return nums * 2\n```\n\n**Solution**:\n```\nclass Solution:\n    def getConcatenation(self, nums):\n        return [*nums, *nums]\n```\n\n**Solution**:\n```\nclass Solution:\n    def getConcatenation(self, nums):\n        return [nums[i % len(nums)] for i in range(len(nums)*2)]\n```\n\n**Solution**:\n```\nclass Solution:\n    def getConcatenation(self, nums):\n        ans = []\n        for num in nums: ans.append(num)\n        for num in nums: ans.append(num)\n        return ans\n```\n\n**Solution**:\n```\nclass Solution:\n    def getConcatenation(self, nums):\n        ans = []\n        for _ in range(2):\n            for num in nums:\n                ans.append(num)\n        return ans\n```\n\n**Solution**:\n```\nclass Solution:\n    def getConcatenation(self, nums):\n        ans = nums.copy()\n        for num in nums: ans.append(num)\n        return ans\n```
['Array', 'Python', 'Python3']