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Complete this code to swap the first and last element of the given array. Do nothing if the array is empty.

Question

Complete this code to swap the first and last element of the given array. Do nothing if the array is empty.

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Solution

Sure, here is a Python solution for your problem:

def swap_elements(arr):
    if len(arr) == 0:
        return arr
    else:
        arr[0], arr[-1] = arr[-1], arr[0]
        return arr

This function swap_elements takes an array arr as input. If the array is empty (i.e., its length is 0), it returns the array as is. Otherwise, it swaps the first and last elements of the array using Python's multiple assignment feature, and then returns the modified array.

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