@sig(H/ ("a"/ H >> ["b"]) >> ["a"] >> ["b"])
def concatMap(f, xs):
    """
    concatMap :: (a -> [b]) -> [a] -> [b]

    Map a function over a list and concatenate the results.
    """
    return concat(map(f, xs))
dataset/ETHPy150Open billpmurphy/hask/hask/Data/List.py/concatMap/swapped operands of `/`