scanl1 -bytestring -containers -base

scanl1 :: (Char -> Char -> Char) -> Text -> Text
text Data.Text, text Data.Text.Lazy
O(n) scanl1 is a variant of scanl that has no starting value argument. Subject to fusion. Performs replacement on invalid scalar values. > scanl1 f [x1, x2, ...] == [x1, x1 `f` x2, ...]