On Thu, Oct 18, 2007 at 08:39:04PM -0400, David Menendez wrote: > On 10/18/07, Stefan O'Rear <[EMAIL PROTECTED]> wrote: > > On Thu, Oct 18, 2007 at 03:36:01AM -0400, [EMAIL PROTECTED] wrote: > > > (As an aside: The H98 report still list the right-zero law as being > > > a law for MonadPlus, even though most MonadPlus instances don't obey > > > it. That's actually a defect in the report.) > > > > All the MonadPlus I can think of (IO,Maybe,[]) satisfy it. Were you > > thinking of right distribution? > > "print 1 >> mzero" returns the same result as "mzero" (i.e., it throws > an exception), but it has different effects.
Oh, hehe. I thought you meant print 1 `mappend` mzero being equal to print 1. Oops. Stefan
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