Reverse an Array
Detailed guide and Python implementation for the 'Reverse an Array' problem.
Problem Statement
Write a function reverse_array(arr) that takes a list of integers arr and returns a new list with the elements in reverse order. For example, [1, 2, 3] becomes [3, 2, 1].
- •0 <= len(arr) <= 10^5
- •-10^9 <= arr[i] <= 10^9
Examples
arr = [1, 2, 3, 4, 5]
[5, 4, 3, 2, 1]
The elements are reversed: first becomes last and last becomes first.
arr = [10, 20]
[20, 10]
Two elements swapped.
arr = [7]
[7]
Single element array reversed is the same.
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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