Re: [Haskell-cafe] Re: don't: a 'do' for comonads?

apfelmus:

Donald Bruce Stewart wrote:

...

As seen on #haskell, from an idea by Malcolm,

14:42 ?let top'n'tail = ("<pre>"++) . (++"</pre>") 14:42 lambdabot> Defined. 14:43 dons> > L.top'n'tail "foo me now" 14:43 lambdabot> "<pre>foo me now</pre>" 14:43 mauke> that reminds me, haskell needs don't 14:43 dons> yes! 14:44 pkhuong-> mm. the opposite of do, eh? do for comonads? :)

So now a prize to the person who comes up with the best use for the identifier:

don't :: ?

-- Don

don't :: IO a -> a

example :: () example = don't (do erase "/dev/hda")

I like it! -- Don