https://leetcode.com/problems/concatenation-of-array/



Runtime: 79 ms, faster than 94.14% of TypeScript online submissions for Concatenation of Array.

Memory Usage: 47.1 MB, less than 35.53% of TypeScript online submissions for Concatenation of Array.



```typescript
function getConcatenation(nums: number[]): number[] {
    //9:58
    return [...nums, ...nums]
    //9:58
};
```