Question

Write a Python function uniqueLast(S) that returns True if and only if the last element of sequence S is unique in S. Specify any special cases

Answer 1

# function definition
# Special case: When list is empty, returning False. since there is no last item.
def uniqueLast(S):
    if len(S) == 0:
        return False
    for i in range(len(S) - 1):
        if S[i] == S[-1]:
            return False
    return True


# Testing the function here
print(uniqueLast([]))
print(uniqueLast([1, 2, 3]))
print(uniqueLast([3]))
print(uniqueLast([4, 7, 9, 7]))
print(uniqueLast([6, 2, 4, 9, 3]))