NonEmptyDict

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

Documentation

data NonEmptyDict k v

A Dict with at least one entry. For use in writing to redis, where it's an error when writing nothing

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 NonEmpty list from a NonEmptyDict

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

creates a NonEmptyDict from a key, value, and dict

keys :: Dict k v -> List k