Data.AppendMap

Map with a better Monoid instance

Map has mappend = union, which is left-biased. AppendMap has mappend = unionWith mappend instead.

Documentation

type AppendMap = MonoidalMap

Deprecated: Use MonoidalMap instead

pattern AppendMap :: Map k v -> MonoidalMap k v

Deprecated: Use MonoidalMap instead

_unAppendMap :: MonoidalMap k v -> Map k v

Deprecated: Use getMonoidalMap instead

nonEmptyDelete :: Ord k => k -> MonoidalMap k a -> Maybe (MonoidalMap k a)

Deletes a key, returning Nothing if the result is empty.

mapMaybeNoNull :: (a -> Maybe b) -> MonoidalMap token a -> Maybe (MonoidalMap token b)

showTree :: forall k a. (Show k, Show a) => MonoidalMap k a -> String

showTreeWith :: forall k a. (k -> a -> String) -> Bool -> Bool -> MonoidalMap k a -> String

module Data.Map.Monoidal

Orphan instances

FunctorMaybe (MonoidalMap k)

Methods

fmapMaybe :: (a -> Maybe b) -> MonoidalMap k a -> MonoidalMap k b

Default (MonoidalMap k a)

Methods

def :: MonoidalMap k a

(Ord k, Additive q) => Additive (MonoidalMap k q)

(Ord k, Group q) => Group (MonoidalMap k q)

Methods

negateG :: MonoidalMap k q -> MonoidalMap k q

(~~) :: MonoidalMap k q -> MonoidalMap k q -> MonoidalMap k q