Didn't recognize the sameness. Aside from there being many ways to do the same thing, partial application makes the mixup even merrier.
Thanks,
Michael
--- On Tue, 1/26/10, Edward Z. Yang <ezyang@MIT.EDU> wrote:
From: Edward Z. Yang <ezyang@MIT.EDU>
Subject: Re: [Haskell-cafe] Maybe, maybe not.
To: "michael rice" <nowgate@yahoo.com>
Cc: "haskell-cafe" <haskell-cafe@haskell.org>
Date: Tuesday, January 26, 2010, 10:52 PMExcerpts from michael rice's message of Tue Jan 26 21:34:42 -0500 2010:
> fromMaybe d x = case x of {Nothing -> d;Just v -> v}
> fromMaybe z = maybe z id
They're equivalent. Here the definition of
maybe:
maybe :: b -> (a -> b) -> Maybe a -> b
maybe n _ Nothing = n
maybe _ f (Just x) = f x
Cheers,
Edward
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