haskell monad
-- Monads are a way of chaining functions in a way
-- that previous computations can have an "effect" on future ones
-- You can model state, non-determinism, IO, partial functions,
-- and tons of other concepts with them.
-- Monads have 2 primary functions associated with them,
return :: Monad m => a -> m a
-- puts a value in the minimal monadic context
(>>=) :: Monad m => m a -> a -> (m b) -> m b
-- allows for a monadic value to be "unwrapped" and passed into
-- another context-creating function
-- for instance, the Maybe type is defined as
data Maybe a = Nothing | Just a
-- the Maybe monad is implemented as
instance Monad Maybe where
-- return :: a -> Maybe a
return x = Just x
-- (>>=) :: Maybe a -> (a -> Maybe b) -> Maybe b
Nothing >>= f = Nothing
(Just x) >>= f = f x
Are there any code examples left?
New code examples in category Haskell
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Haskell 2022-03-17 02:30:14 string to list haskell
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Haskell 2022-03-03 08:10:01 list length haskell
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Haskell 2022-02-27 12:00:37 haskell return false if list empty
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Haskell 2022-02-24 19:15:24 fibnocci code in haskell language
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Haskell 2022-02-10 07:55:04 can't do a reify in the IO monad
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Haskell 2022-01-31 00:20:20 remove nth element from list haskell
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Haskell 2022-01-29 08:16:12 haskell max function
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Haskell 2022-01-27 18:51:21 haskell merge lists
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Haskell 2022-01-22 12:26:49 list comprehension haskell
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Haskell 2021-11-15 16:39:17 cabal package from GitHub