Write a Python program to find the first duplicate element in a given array of integers. Return -1 If there are no such elements.
Python Code :
def find_first_duplicate(nums): num_set = set() no_duplicate = -1 for i in range(len(nums)): if nums[i] in num_set: return nums[i] else: num_set.add(nums[i]) return no_duplicate print(find_first_duplicate([1, 2, 3, 4, 4, 5])) print(find_first_duplicate([1, 2, 3, 4])) print(find_first_duplicate([1, 1, 2, 3, 3, 2, 2]))
4 -1 1
Write a Python program to find the first duplicate element in a given array of integers
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