this is the same as the function 'fromMaybe' in Data.Maybe. the 'maybe' function in that library is also incredibly useful. On Wed, 12 Nov 2003, Andrew Pimlott wrote:
On Wed, Nov 12, 2003 at 02:54:32PM +0000, Graham Klyne wrote:
I just spotted a possible idiom for something that seems to pop up from time to time:
foldr const
But I can't help feeling that this code is perversely obscure.
Clever. I usually end up with something like
listToMaybe list `orMaybe` default
orMaybe (Just x) _ = x orMaybe Nothing y = y
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