Web Reference: Apr 20, 2013 · How to find out the first common element in two lists (in this case, "2") in a concise and elegant way? Any list can be empty or there can be no common elements - in this case None is fine. Jul 23, 2025 · To find the common elements in two arrays in Python, we have to first sort the arrays, then just iterate in the sorted arrays to find the common elements between those arrays. How do you find the first common element in two arrays? My attempt: I looped through each at the same time and add the current value to a separate set for each of the lists.
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