Safe Haskell | None |
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Language | Haskell98 |
Simple, stateful signal processing.
Scanning implements elementary, step-based accumulating over signal functions by means of an auxiliary function applied to each input and to an accumulator. For comparison with other FRP libraries and with stream processing abstractions, think of fold.
Documentation
sscan :: (b -> a -> b) -> b -> SF a b Source #
Applies a function point-wise, using the last output as next input. This creates a well-formed loop based on a pure, auxiliary function.
sscanPrim :: (c -> a -> Maybe (c, b)) -> c -> b -> SF a b Source #
Generic version of sscan
, in which the auxiliary function produces
an internal accumulator and an "held" output.
Applies a function point-wise, using the last known Just
output to form
the output, and next input accumulator. If the output is Nothing
, the last
known accumulators are used. This creates a well-formed loop based on a
pure, auxiliary function.