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Within LTS Haskell 24.61 (ghc-9.10.3)

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Exact lookup

1. lookupR :: Ord r => r -> Bimap l r -> Maybe l

   rattletrap	Rattletrap.Type.ClassAttributeMap

   No documentation available.

2. lookupClassName :: Str -> BitGet Str

   rattletrap	Rattletrap.Type.Replication.Spawned

   No documentation available.

3. lookupName :: ClassAttributeMap -> Maybe U32 -> BitGet (Maybe Str)

   rattletrap	Rattletrap.Type.Replication.Spawned

   No documentation available.

4. lookupObjectName :: ClassAttributeMap -> U32 -> BitGet Str

   rattletrap	Rattletrap.Type.Replication.Spawned

   No documentation available.

5. lookupEnv :: (IsString a, MonadIO m) => String -> m (Maybe a)

   read-env-var	System.ReadEnvVar

   Like System.Environment's lookupEnv, but using IsString to make it more general. Lookup an environment variable that exists:

   >>> setEnv "TEST_ENV_VAR" "foo"
   
   >>> lookupEnv "TEST_ENV_VAR" :: IO (Maybe String)
   Just "foo"
   

   Lookup an environment variable that doesn't exist. Return Nothing:

   >>> lookupEnv "THIS_ENV_VAR_WILL_NOT_EXIST" :: IO (Maybe String)
   Nothing
   

6. lookupEnvDef :: (IsString a, MonadIO m) => String -> a -> m a

   read-env-var	System.ReadEnvVar

   Like lookupEnv but take a default value. Lookup an environment variable that exists:

   >>> setEnv "TEST_ENV_VAR" "foo"
   
   >>> lookupEnvDef "TEST_ENV_VAR" "bar" :: IO String
   "foo"
   

   Lookup an environment variable that doesn't exist. Return the default value:

   >>> lookupEnvDef "THIS_ENV_VAR_WILL_NOT_EXIST" "bar" :: IO String
   "bar"
   

7. lookupEnvEx :: (IsString a, MonadIO m, MonadThrow m) => String -> m a

   read-env-var	System.ReadEnvVar

   Like lookupEnv, but instead of returning a Maybe, throw an EnvVarDoesNotExistException if the environment variable does not exist. The exception is thrown with throwM from MonadThrow. Lookup an environment variable that exists:

   >>> setEnv "TEST_ENV_VAR" "foo"
   
   >>> lookupEnvEx "TEST_ENV_VAR" :: IO String
   "foo"
   

   Lookup an environment variable that doesn't exist. Throws EnvVarDoesNotExistException.

   >>> lookupEnvEx "THIS_ENV_VAR_WILL_NOT_EXIST" :: IO String
   *** Exception: EnvVarDoesNotExistException "THIS_ENV_VAR_WILL_NOT_EXIST"
   

8. lookupLF :: NodeId -> LayoutForest a -> Maybe (LayoutTree a)

   reflex-vty	Reflex.Vty.Widget.Layout

   Perform a lookup by NodeId in a LayoutForest

9. lookupByEmail :: IAuthBackend r => r -> Text -> IO (Maybe AuthUser)

   snap	Snap.Snaplet.Auth

   No documentation available.

10. lookupByLogin :: IAuthBackend r => r -> Text -> IO (Maybe AuthUser)

    snap	Snap.Snaplet.Auth

    No documentation available.

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