Simple monad examples
From HaskellWiki
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Revision as of 02:38, 19 March 2006
This page is designed to show some simple examples of using monads.
I personally found that I reached monad-enlightenment once I contrived this simple example while playing around to see the "guts" of a monadic expression:
Just 5 >>= (\ x -> if (x == 0) then fail "zero" else Just (x + 1) )
Which results in:
Just 6Some simple exercises:
What would the following snippets resolve to?
Just 0 >>= (\ x -> if (x == 0) then fail "zero" else Just (x + 1) ) Nothing >>= (\ x -> if (x == 0) then fail "zero" else Just (x + 1) )
