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Adam 2013-07-03 23:01:47 -07:00
parent 9ad61b5586
commit 8b536513d7
1 changed files with 7 additions and 7 deletions
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@ -367,14 +367,14 @@ main'' = do
putStrLn result
putStrLn "This was all, folks!"
-- The type `IO` is an example of a "monad". The way Haskell uses a monad to do IO allows it to
-- be a purely functional language. Any function that interacts with the outside world (i.e. does IO)
-- gets marked as `IO` in its type signature. This lets us reason about what
-- functions are "pure" (don't interact with the outside world or modify state)
-- and what functions aren't.
-- The type `IO` is an example of a "monad". The way Haskell uses a monad to
-- do IO allows it to be a purely functional language. Any function that
-- interacts with the outside world (i.e. does IO) gets marked as `IO` in its
-- type signature. This lets us reason about what functions are "pure" (don't
-- interact with the outside world or modify state) and what functions aren't.
-- This is a powerful feature, because it's easy to run pure functions concurrently
-- so concurrency in Haskell is very easy.
-- This is a powerful feature, because it's easy to run pure functions
-- concurrently; so, concurrency in Haskell is very easy.
----------------------------------------------------