Discussion on: A common coding interview question

[dillan teagle]

import pytest



def findIntersection(arr):
    unique = list()
    duplicates = []
    for string in arr: 
        for char in string.split(','):
            if int("".join(char)) in unique:
                duplicates.append(int("".join(char)))
            else:
                unique.append(int("".join(char)))

    return duplicates



@pytest.mark.parametrize(
    ("arr_s", "expected"),
    (["1, 3, 4, 7, 13", "1, 2, 4, 13, 15"], [1, 4, 13]),
)
def test(arr_s, expected):
    assert findIntersection(arr_s) == expected




if __name__ == "__main__":
    x = ["1, 3, 4, 7, 13", "1, 2, 4, 13, 15"]
    print(findIntersection(x))