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1. lmapCodec :: (newInput -> oldInput) -> Codec context oldInput output -> Codec context newInput output

   autodocodec	Autodocodec.Codec

   Map the input part of a codec You can use this function if you only need to map the rendering-side of a codec. This function is probably only useful if the function you map does not change the codec type. WARNING: This can be used to produce a codec that does not roundtrip.

   >>> toJSONVia (lmapCodec (*2) (codec :: JSONCodec Int)) 5
   Number 10.0
   

2. rmapCodec :: (oldOutput -> newOutput) -> Codec context input oldOutput -> Codec context input newOutput

   autodocodec	Autodocodec.Codec

   Map the output part of a codec You can use this function if you only need to map the parsing-side of a codec. This function is probably only useful if the function you map does not change the codec type. WARNING: This can be used to produce a codec that does not roundtrip.

   >>> JSON.parseMaybe (parseJSONVia (rmapCodec (*2) codec)) (Number 5) :: Maybe Int
   Just 10
   

3. forkMapM :: (a -> IO b) -> [a] -> IO [Either SomeException b]

   monad-loops	Control.Monad.Loops

   Like mapM, but run all the actions in parallel threads, collecting up the results and returning them all. Does not return until all actions finish.

4. forkMapM_ :: (a -> IO b) -> [a] -> IO [Maybe SomeException]

   monad-loops	Control.Monad.Loops

   like forkMapM but without bothering to keep the return values

5. forkMapM__ :: (a -> IO b) -> [a] -> IO ()

   monad-loops	Control.Monad.Loops

   like forkMapM_ but not even bothering to track success or failure of the child threads. Still waits for them all though.

6. contramapGLogFunc :: (a -> b) -> GLogFunc b -> GLogFunc a

   rio	RIO

   A contramap. Use this to wrap sub-loggers via mapRIO. If you are on base > 4.12.0, you can just use contramap.

7. contramapMaybeGLogFunc :: (a -> Maybe b) -> GLogFunc b -> GLogFunc a

   rio	RIO

   A vesion of contramapMaybeGLogFunc which supports filering.

8. concatMap :: (Word8 -> ByteString) -> ByteString -> ByteString

   rio	RIO.ByteString

   Map a function over a ByteString and concatenate the results

9. concatMap :: (Word8 -> ByteString) -> ByteString -> ByteString

   rio	RIO.ByteString.Lazy

   Map a function over a ByteString and concatenate the results

10. module RIO.HashMap

    Strict Map with hashed keys. Import as:

    import qualified RIO.HashMap as HM
    

    This module does not export any partial functions. For those, see RIO.HashMap.Partial

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