NonEmptyDict

A simple NonEmpty dict wrapper to protect us from writing invalid empty Dicts to Redis Hashes.

Documentation

data NonEmptyDict k v

Instances

(Show k, Show v) => Show (NonEmptyDict k v)

Defined in NonEmptyDict

Methods

showsPrec :: Int -> NonEmptyDict k v -> ShowS

show :: NonEmptyDict k v -> String

showList :: [NonEmptyDict k v] -> ShowS

fromDict :: Ord k => Dict k v -> Maybe (NonEmptyDict k v)

tries to create a NonEmptyDict from a Dict

toDict :: Ord k => NonEmptyDict k v -> Dict k v

creates a Dict from a NonEmptyDict

toNonEmptyList :: NonEmptyDict k v -> NonEmpty (k, v)

creates a Dict from a NonEmptyDict

init :: Ord k => k -> v -> Dict k v -> NonEmptyDict k v

keys :: Dict k v -> List k

Get all of the keys in a dictionary, sorted from lowest to highest.

keys (fromList [(0,"Alice"),(1,"Bob")]) == [0,1]