:: x -> HashMap x y -> y

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

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

Return the value to which the specified key is mapped. Calls error if this map contains no mapping for the key.

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

boltzmann-samplers Boltzmann.Data.Oracle

lookup :: (Eq k, Hashable k) => k -> HashMap k v -> Maybe 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 Nothing if this map contains no mapping for the key.

(!?) :: (Eq k, Hashable k) => HashMap k v -> k -> Maybe v

unordered-containers Data.HashMap.Internal Data.HashMap.Internal.Strict Data.HashMap.Lazy Data.HashMap.Strict

Return the value to which the specified key is mapped, or Nothing if this map contains no mapping for the key. This is a flipped version of lookup.