Potoki.Consume

Documentation

data Consume input output :: * -> * -> *

Active consumer of input into output. Sort of like a reducer in Map/Reduce.

Automates the management of resources.

transform :: Transform input1 input2 -> Consume input2 output -> Consume input1 output

count :: Consume input Int

sum :: Num num => Consume num num

head :: Consume input (Maybe input)

last :: Consume input (Maybe input)

list :: Consume input [input]

reverseList :: Consume input [input]

A faster alternative to "list", which however constructs the list in the reverse order.

vector :: Consume input (Vector input)

concat :: Monoid monoid => Consume monoid monoid

fold :: Fold input output -> Consume input output

foldInIO :: FoldM IO input output -> Consume input output

folding :: Fold a b -> Consume a c -> Consume a (b, c)

foldingInIO :: FoldM IO a b -> Consume a c -> Consume a (b, c)

execState :: (a -> State s b) -> s -> Consume a s

writeBytesToFile :: FilePath -> Consume ByteString (Either IOException ())

Overwrite a file.

• Exception-free
• Automatic resource management

appendBytesToFile :: FilePath -> Consume ByteString (Either IOException ())

Append to a file.

• Exception-free
• Automatic resource management

deleteFiles :: Consume FilePath (Either IOException ())

printBytes :: Consume ByteString ()

printText :: Consume Text ()

printString :: Consume String ()

parseBytes :: Parser output -> Consume ByteString (Either Text output)

parseText :: Parser output -> Consume Text (Either Text output)

concurrently :: Int -> Consume a b -> Consume b c -> Consume a c

Execute a Consume concurrently and consume its results.