concat -bytestring +base

concat :: [[a]] -> [a]
base Prelude, base Data.List
Concatenate a list of lists.
concat :: Foldable t => t [a] -> [a]
base Data.Foldable
The concatenation of all the elements of a container of lists.
concatMap :: (a -> [b]) -> [a] -> [b]
base Prelude, base Data.List
Map a function over a list and concatenate the results.
concatMap :: Foldable t => (a -> [b]) -> t a -> [b]
base Data.Foldable
Map a function over all the elements of a container and concatenate the resulting lists.
mconcat :: Monoid a => [a] -> a
base Data.Monoid