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Re: [Haskell-cafe] Data.Tree.Zipper in the standard libraries

Subject: Re: [Haskell-cafe] Data.Tree.Zipper in the standard libraries
From: Jules Bean
Date: Fri, 23 May 2008 16:09:10 +0100
Miguel Mitrofanov wrote:
I think that MonadZero m => ... is better than just Maybe. If you can have more general solution for free, why fight it?

Because Maybe exists and MonadZero doesn't?

Jules
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