sortBy package:mono-traversable

sortBy :: SemiSequence seq => (Element seq -> Element seq -> Ordering) -> seq -> seq
mono-traversable Data.Sequences
Sort a sequence using an supplied element ordering function. 
> let compare' x y = case compare x y of LT -> GT; EQ -> EQ; GT -> LT
> sortBy compare' [5,3,6,1,2,4]
[6,5,4,3,2,1]
defaultSortBy :: IsSequence seq => (Element seq -> Element seq -> Ordering) -> seq -> seq
mono-traversable Data.Sequences
Use Data.List's implementation of sortBy.
vectorSortBy :: Vector v e => (e -> e -> Ordering) -> v e -> v e
mono-traversable Data.Sequences
Sort a vector using an supplied element ordering function.