map -package:unordered-containers -package:containers -package:imports -package:base -is:exact -package:foldl -package:bytestring -package:integration -package:basement -package:invertible package:conduit
Apply a transformation to all values in a stream.
Subject to fusion
Apply a transformation to all values in a stream.
Subject to fusion
Since 0.3.0
Consume a source with a strict accumulator, in a way piecewise defined
by a controlling stream. The latter will be evaluated until it
terminates.
>>> let f a s = liftM (:s) $ mapC (*a) =$ CL.take a
>>> reverse $ runIdentity $ yieldMany [0..3] $$ mapAccumS f [] (yieldMany [1..])
[[],[1],[4,6],[12,15,18]] :: [[Int]]
mapWhileC with a break condition dependent on a strict
accumulator. Equivalently,
mapAccum as long as the result is
Right. Instead of producing a leftover, the breaking input
determines the resulting accumulator via
Left.
Apply a transformation to all values in a stream.
Apply a transformation to all elements in a chunked stream.
Apply a monadic transformation to all values in a stream.
If you do not need the transformed values, and instead just want the
monadic side-effects of running the action, see mapM_.
Apply a monadic transformation to all elements in a chunked stream.
Apply the action to all values in the stream.
Note: if you want to pass the values instead of
consuming them, use iterM instead.
Apply the action to all elements in the chunked stream.
Note: the same caveat as with
mapM_C applies. If you don't want
to consume the values, you can use
iterM:
iterM (omapM_ f)
Map values as long as the result is Just.
Apply a function to all the input values of a ConduitT.
Since 0.5.0
Apply a monadic action to all the input values of a ConduitT.
Since 1.3.2
Apply a function to all the output values of a
ConduitT.
This mimics the behavior of
fmap for a
Source and
Conduit in pre-0.4 days. It can also be simulated by fusing
with the
map conduit from
Data.Conduit.List.
Since 0.4.1
Same as
mapOutput, but use a function that returns
Maybe values.
Since 0.5.0
mapWhile with a break condition dependent on a strict
accumulator. Equivalently,
mapAccum as long as the result is
Right. Instead of producing a leftover, the breaking input
determines the resulting accumulator via
Left.
Subject to fusion
Apply a transformation to all elements in a chunked stream.
Subject to fusion
Apply a monadic transformation to all values in a stream.
If you do not need the transformed values, and instead just want the
monadic side-effects of running the action, see
mapM_.
Subject to fusion
Apply a monadic transformation to all elements in a chunked stream.
Subject to fusion
Apply the action to all values in the stream.
Note: if you want to
pass the values instead of
consuming them, use
iterM instead.
Subject to fusion
Apply the action to all elements in the chunked stream.
Note: the same caveat as with
mapM_ applies. If you don't want
to consume the values, you can use
iterM:
iterM (omapM_ f)
Subject to fusion
Map values as long as the result is Just.