lookupDefault is:exact

lookupDefault :: (Eq k, Hashable k) => v -> k -> HashMap k v -> v

unordered-containers Data.HashMap.Internal Data.HashMap.Internal.Strict Data.HashMap.Lazy Data.HashMap.Strict, rio RIO.HashMap

Return the value to which the specified key is mapped, or the default value if this map contains no mapping for the key. DEPRECATED: lookupDefault is deprecated as of version 0.2.11, replaced by findWithDefault.

lookupDefault :: StaticMap t => Val t -> Key t -> t -> Val t

relude Relude.Extra.Map

Return the value to which the specified key is mapped, or the default value if this map contains no mapping for the key.

>>> let myHashMap = HashMap.fromList [('a', "xxx"), ('b', "yyy")]

>>> lookupDefault "zzz" 'b' myHashMap
"yyy"

>>> lookupDefault "zzz" 'c' myHashMap
"zzz"

lookupDefault :: Configured a => a -> Config -> Name -> IO a

configurator Data.Configurator

Look up a name in the given Config. If a binding exists, and the value can be converted to the desired type, return it, otherwise return the default value.

lookupDefault :: (Eq k, Hashable k) => v -> k -> InsOrdHashMap k v -> v

insert-ordered-containers Data.HashMap.Strict.InsOrd

lookupDefault :: Indexable f => Key f -> f a -> Maybe a

keys Data.Key