group package:mono-traversable

group :: (IsSequence seq, Eq (Element seq)) => seq -> [seq]
mono-traversable Data.Sequences
Equivalent to groupBy (==)
groupAll :: (IsSequence seq, Eq (Element seq)) => seq -> [seq]
mono-traversable Data.Sequences
Similar to standard group, but operates on the whole collection, not just the consecutive items. Equivalent to groupAllOn id
groupAllOn :: (IsSequence seq, Eq b) => (Element seq -> b) -> seq -> [seq]
mono-traversable Data.Sequences
Similar to standard groupBy, but operates on the whole collection, not just the consecutive items.
groupBy :: IsSequence seq => (Element seq -> Element seq -> Bool) -> seq -> [seq]
mono-traversable Data.Sequences
group takes a sequence and returns a list of sequences such that the concatenation of the result is equal to the argument. Each subsequence in the result contains only equal elements, using the supplied equality test. 
> groupBy (==) Mississippi
[M,"i","ss","i","ss","i","pp","i"]